WO2015174740A1 - Front-end-enlargeable pile, and method for constructing same - Google Patents
Front-end-enlargeable pile, and method for constructing same Download PDFInfo
- Publication number
- WO2015174740A1 WO2015174740A1 PCT/KR2015/004815 KR2015004815W WO2015174740A1 WO 2015174740 A1 WO2015174740 A1 WO 2015174740A1 KR 2015004815 W KR2015004815 W KR 2015004815W WO 2015174740 A1 WO2015174740 A1 WO 2015174740A1
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- Prior art keywords
- pile
- expansion
- tip
- guide
- base member
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
Definitions
- the present invention by using a simple equipment without a separate drill drill to expand the pile ground at the same time quickly by cutting the piling ground in various geometries at the same time to form a pile expansion, the tip expansion type pile and its construction method that can greatly increase the allowable bearing capacity of the pile It is about.
- the pile is to support the load of the upper structure, the process of forming a hole in the ground must be preceded for the pile construction.
- the drilling hole may adopt a variety of construction methods according to the ground conditions or pile diameter, and the deviation of air and construction cost is very large depending on which construction method is adopted.
- the pile supports the structure by the tip support force and the main frictional force, in order to secure a sufficient support force of the pile may be considered to increase the tip support force through the expansion of the pile tip.
- this conventional technology has a lot of input of the equipment used, not only the amount of drilling more than necessary, but also had a disadvantage in that it is difficult to prevent the wall of the enlarged hole from being relaxed or collapsed.
- the slime and the groundwater coexist in the pile enlargement space, it is difficult to guarantee the excellent quality of the concrete.
- the registered patent since the registered patent has a reinforcing plate attached to the bottom of the pile, the tip of the pile itself is already enlarged, so the expanded diameter of the pile tip is difficult to be larger than the diameter of the hole. In addition, it is difficult to apply in the hard ground, and when forming the whole hole with the increased diameter of the pile tip, except for the pile tip is excessively perforated to cause a large increase in air and construction costs.
- the present invention by using a simple equipment without a separate drill drill to expand the pile piling ground at the same time and quickly to form a pile expansion, to increase the permissible bearing capacity of the pile, and the construction method thereof To provide.
- the present invention is to provide a tip expansion type pile and its construction method which is excellent in economic efficiency and quick construction with minimal diameter cutting by a solid expansion body equipped with a cutting tip on the outside diameter-cutting the ground.
- the present invention is to provide a tip expansion-type pile and its construction method that can be prevented from being relaxed or collapsed by the expansion of the pile at the same time the diameter expansion cutting.
- the present invention is to provide a tip expansion type pile and a construction method thereof that can form a pile expansion with a simpler configuration.
- the present invention relates to a front end expansion type pile consisting of a diameter expansion by the pressurized body while being coupled to the pile body, the lower portion of the pile main body is rotated with the rotation of the pile body, A base member; A guide tube which is integrally formed on the upper surface of the center of the base member so that the upper part is opened to allow the press body to enter from the upper part and a plurality of entrance holes are formed on the outer circumferential surface; A coupling member fixedly coupling the guide tube to the pile body; And a base provided between the base member and the lower portion of the pile main body, and a wing having a cutting tool formed at an outer side thereof, and a rear end of the wing unit, one end of which penetrates the entrance hole of the guide tube and is positioned in the guide tube.
- An expansion body consisting of a pressing portion for extending the wing portion by sliding the outside of the guide tube by the outside; Provides a front end expandable pile, characterized in that consisting of.
- the coupling member provides a front end-type pile, characterized in that a plurality of partition members connecting the inner surface of the pile body and the guide tube.
- the pile body is provided with a front end expandable pile, which is divided into a lower member to which an enlarged orifice is coupled and an upper member to be coupled to an upper portion of the lower member.
- a stepped portion is formed inside the upper end of the lower member to provide an extended end-type pile, characterized in that the lower end of the upper member is coupled to be seated on the stepped portion.
- a screw thread is formed on a lower outer circumferential surface of the upper member, and a female thread is formed on a side inner circumferential surface of the stepped portion of the lower member so that the upper member and the lower member are screwed together.
- the coupling member is formed to protrude on the outer circumferential surface of the guide tube, and a thread is formed on the outer circumferential surface, thereby providing a tip-extended pile, which is screwed to a female thread formed on the inner circumferential surface of the pile body.
- the coupling member protrudes on the outer circumferential surface of the guide tube and contacts the inner circumferential surface of the pile body, and provides a tip-expanded pile that is coupled to the pile body by a fastening member outside the pile body.
- the partition member is provided at the position of each expansion body, and the lower end of the partition member protrudes a predetermined length to the bottom of the pile body, and the lower end of the partition member is inserted into the upper surface of the expansion body.
- Expanded guide portion which is a groove portion to be provided in the front expansion type pile, characterized in that formed in the expansion direction of the expansion body.
- a plurality of guide rails which are protrusions or grooves, are formed at a lower end of the pile body, and a groove portion corresponding to the guide rail portion is engaged on an upper surface of the extension body. It provides a tip expansion type pile, characterized in that the expansion guide is formed as a protrusion.
- the present invention relates to a front end expansion type pile consisting of a diameter expansion by the pressurized body while being rotated with the rotation of the pile body is coupled to the pile body, the pile main body, the expansion sphere is A base member; A guide tube which is integrally formed on the upper surface of the center of the base member so that the upper part is opened to allow the press body to enter from the upper part and a plurality of entrance holes are formed on the outer circumferential surface; An upper guide member coupled to an upper portion of the guide tube and having an upper through hole formed at a center thereof; And a wing portion having a cutting hole formed on the outside and a rear end portion of the wing portion provided between the base member and the upper guide member, one end of which penetrates the entrance hole of the guide tube and is located in the guide tube to pressurize the pressure body.
- An expansion body consisting of a pressing portion for extending the wing portion by sliding the outside of the guide tube by the outside; Provides a front end expandable pile, characterized in
- the upper guide member is provided with a tip-extended pile, characterized in that the reinforcing member is fixed to the pile body and coupled to the pile body.
- the present invention according to another preferred embodiment provides a tip-expanded pile, characterized in that a plurality of coupling holes are formed to be coupled to the end of the reinforcing member is inserted around the upper through hole of the upper guide member.
- the present invention according to another preferred embodiment provides a tip-extended pile, characterized in that the gap between the upper guide member and the base member increases toward the outside.
- the base member provides a front end-type pile, characterized in that the inclined surface is inclined upwardly outward.
- At least one or more of the lower surface of the upper guide member or the upper surface of the base member is provided with a guide rail portion that is a protrusion or groove in the expansion direction of the expansion body, and the guide rail portion of the expansion body.
- Corresponding site provides a tip-extended pile, characterized in that the expansion guide is formed in the groove or protrusion engaging the guide rail.
- the present invention according to another preferred embodiment provides a tip-extended pile, characterized in that the lower surface is inclined so that the thickness of the wing portion of the expansion toward the outside.
- the base member provides a tip-extended pile, characterized in that a plurality of support wings protruding outward of the base member is formed at the bottom of each extension to support the bottom of the extension. .
- the present invention according to another preferred embodiment provides a tip-extended pile, characterized in that the thickness of the wing portion of the expansion toward the outside in the expansion direction becomes thicker.
- the cutting tool provides a tip-extended pile, characterized in that the cutting tip or a water jet injection nozzle for spraying any one of high pressure water, flame or hot water.
- the lower end of the base member is formed with a through-hole through which a press body penetrates, and the lower end of the base member is characterized in that the conical inlet is reduced in diameter toward the lower portion thereof.
- an injection hole is formed at a lower end of the conical penetration part, and a stopper is formed in the injection hole to selectively close the injection hole, and the injection hole has a stepped portion formed at the lower part of the injection hole.
- the guide rod is inserted into the injection hole and is formed at the lower end of the guide rod provides a tip-extended pile, characterized in that consisting of the engaging portion is caught in the stepped portion is expanded diameter.
- the conical penetration provides a front-end expansion pile, characterized in that coupled to the base member to be separated from the base member by the pressure inside the expansion sphere.
- the present invention is fitted into the lower through-hole of the base member in the upper end of the conical inlet is formed in the fitting portion formed with a cutout at a position corresponding to the entrance hole of the guide tube, the outside of the lower portion of the fitting It provides a front end-type pile, characterized in that the stopper portion is formed on the lower surface of the base member.
- the present invention according to another preferred embodiment provides a front-end expansion type pile, characterized in that the outer diameter before expansion of the expansion sphere is larger than the outer diameter of the pile body.
- the present invention according to a preferred embodiment relates to a method for constructing the tip expansion type pile, (a) forming a hole in the ground; (b) inserting a tip-expanded pile having an enlarged orifice coupled to the bottom of the pile body into a drilling hole; And (c) inserting a press body into the guide tube while rotating the enlarged sphere to press the end portion of the press unit so that the expander extends out of the enlarged sphere while cutting the ground. It provides a construction method of the tip expansion-type pile, characterized in that comprising a.
- the present invention according to another preferred embodiment relates to a method for constructing the tip expansion type pile, (a) forming a hole in the ground; (b) inserting the enlarged orifice into the lower portion of the drilling hole; (c) inserting a press body into the guide tube while rotating the enlarged orifice to press the end of the press to allow the expander to extend out of the enlarged oral cavity while cutting the ground; And (d) pouring concrete on the enlarged sphere to form a cast-in-place pile; It provides a construction method of the tip expansion-type pile, characterized in that comprising a.
- the present invention according to another preferred embodiment relates to a method for constructing the tip-expansion pile, (a) the expansion-expanded pile coupled to the bottom of the pile main body by any one of the type, press-fit or rotary penetration Inserting; And (b) inserting a press body into the guide tube while rotating the enlarged sphere to press the end portion of the press unit so that the expander extends out of the enlarged sphere while cutting the ground. It provides a construction method of the tip expansion-type pile, characterized in that comprising a.
- the horizontal radially expanding cutting tip can provide a pile enlargement cross section of the designed dimension without excessive cutting, thereby significantly increasing the bearing capacity and the pullout resistance with the minimum amount of cutting work and the minimum number of expansion bodies.
- the conical penetration portion when the conical penetration portion is provided in the lower portion of the base member can prevent the lower slime from flowing into the enlarged sphere at the initial stage of pressurization, it is possible to increase the lower ground density by discharging the filling material through the injection hole after pressing.
- the expansion body is a sliding guide between the lower end of the pile body and the base member, the configuration is simple and easy to manufacture and maintain.
- the lower corner plate of the PHC pile may be used as the upper guide member.
- FIG. 1 is a perspective view of the tip expansion type pile according to the present invention.
- Figure 2 is a perspective view of a portion of the enlarged sphere showing an embodiment of the coupling member.
- FIG 3 is a perspective view of a portion of the enlarged mouth showing other embodiments of the coupling member.
- FIG. 4 is a perspective view of a magnifying sphere showing before and after expansion of the expander
- FIG. 5 is a view showing an embodiment of the present invention the front end-type pile consisting of a pile body separated into upper and lower members.
- Figure 6 is a view showing another embodiment of the present invention the front end-type pile consisting of a pile body separated by upper and lower members.
- FIG 7 and 8 are perspective views showing the coupling relationship between the pile body bottom and the expansion body.
- FIG. 9 is a perspective view showing another embodiment of the enlarged oral cavity.
- FIG. 10 is a cross-sectional perspective view of the present invention the front end-type pile equipped with a reinforcing member.
- 11 is a cross-sectional view showing a coupling relationship between the pile body lower end and the expansion body.
- FIG. 12 is a bottom perspective view of the expander formed with an extension guide.
- Figure 13 is a perspective view of a magnifying glass provided with a support wing.
- FIG. 14 is a bottom perspective view of the expander in which the upper and lower surfaces of the wing are configured in parallel.
- 15 is a cross-sectional view showing a coupling relationship between the pile body lower end and the expansion body.
- 16 is a perspective view of an extension showing various embodiments of a cutting tip.
- 17 is a view showing the present invention the front end expansion pile equipped with a conical penetration.
- FIG. 18 is a longitudinal sectional view of the present invention, the tip expansion type pile showing a conical intrusion dropped by the pressure of the filler.
- the tip expansion type pile of the present invention is composed of a diameter-expanded diameter by the pressure body while being coupled to the pile body, the pile body lower coupled to the pile body, the expansion sphere, the base member;
- a guide tube which is integrally formed on the upper surface of the center of the base member so that the upper part is opened to allow the press body to enter from the upper part and a plurality of entrance holes are formed on the outer circumferential surface;
- a coupling member fixedly coupling the guide tube to the pile body;
- a base provided between the base member and the lower portion of the pile main body, and a wing having a cutting tool formed at an outer side thereof, and a rear end of the wing unit, one end of which penetrates the entrance hole of the guide tube and is positioned in the guide tube.
- An expansion body consisting of a pressing portion for extending the wing portion by sliding the outside of the guide tube by the outside; Characterized in that consists of.
- FIG. 1 is a perspective view of the tip expansion type pile according to the present invention.
- the tip expansion type pile of the present invention is coupled to the pile body 10, the lower portion of the pile body 10 is rotated with the rotation of the pile body 10, the diameter by the pressing body 30 It consists of an enlarged oral diameter (20).
- the pile body 10 may be composed of a ready-made concrete pile or steel pipe pile, the expansion sphere 20 is rotatable in accordance with the rotation of the pile body (10). In this case, with the rotation of the pile body 10, the expansion body 24 of the enlarged orifice 20 expands radially to form a pile expansion portion.
- the pile body 10 may be configured as a cast-in-place pile.
- the diameter of the ground is cut by rotating only the diameter sphere 20 separately from the pile body 10 first, and then the pile body 10 is installed later.
- the enlarged diameter hole 20 is a portion for rapidly forming a pile enlarged portion having a diameter larger than that of the pile body 10 at the tip of the pile without an additional drilling drill, the base member 21, the guide tube 22, and the coupling member ( 23) and the expansion body 24 is comprised.
- the base member 21 is located on the bottom surface of the enlarged oral cavity 20, and as shown in (b) of FIG. 10 to be described later, a lower portion through which the press body 30 penetrates in the center of the base member 21 will be described.
- a ball 214 can be formed.
- the base member 21 and the pile body 10 guide the horizontal expansion of the expansion body 24 provided therebetween.
- the guide tube 22 is formed to protrude integrally on the upper surface of the center of the base member 21, the upper portion is opened so that the press body 30 can enter from the upper portion, and a plurality of entrance holes 221 are formed on the outer circumferential surface.
- the guide tube 22 is fixedly coupled to the inside of the pile body 10 by the coupling member (23).
- the coupling member 23 Various embodiments of the coupling member 23 will be described with reference to FIGS. 2 and 3.
- the expansion body 24 is provided between the base member 21 and the lower portion of the pile body 10, and is composed of a wing part 241 and a pressing part 243.
- the wing 241 and the pressing portion 243 may be integrally or separated from each other, a plurality of expansion bodies 24 may be provided.
- the wing 241 is formed with a cutting tool 242 for diameter-cutting the ground on the outside.
- the pressurizing portion 243 is provided at the rear end of the wing portion 241, and one end thereof passes through the entrance and exit hole 221 of the guide tube 22 and is positioned in the guide tube 22.
- the wing part 241 is expanded to the outside by slidingly moving out of the guide pipe 22 by pressurization.
- the pressurizer 30 presses the pressurizing portion 243 inside the guide tube 22 inside the guide tube 22
- the pressurizing portion 243 slides out of the guide tube 22 through the entrance hole 221.
- the wing portion 241 positioned at the front end of the pressing portion 243 extends together between the upper surface of the base member 21 and the lower end of the pile body 10, the expansion body 24 extends outside the pile body 10. Protrudes to enlarge the diameter of the enlarged sphere (20).
- the expansion body 24 serves as a permanent reinforcement of the pile expansion portion in the expanded state after completion of the pile construction.
- the allowable bearing capacity of the pile is greatly increased by securing the tip bearing capacity, and thus economical construction is possible by minimizing the number of piles and optimizing the drilling depth.
- the expansion body 24 may diameter-cut the ground by using the pressing force caused by the hit or vibration of the pressing body 30 and the rotational force of the pile body 10. Therefore, the ground cutting speed is high, and the ground can be cut in various layers from the soil layer to the rock layer.
- Figure 2 is a perspective view of a portion of the enlarged sphere showing an embodiment of the coupling member.
- the coupling member 23 may be composed of a plurality of partition members connecting the inner surface of the pile body 10 and the outer surface of the guide tube 22.
- the pile body 10 is composed of a steel pipe pile.
- the partition member may be disposed in a vertical direction as in FIG. 2A or in a horizontal direction as in FIG. 2B.
- the partition member has an inner end integrally coupled to the guide tube 22, and the outer end may be welded to the inner surface of the pile body 10 to couple the pile body 10 to the guide tube 22.
- the partition member should be coupled to a position not interfere with the entrance hole 221 formed in the guide tube 22.
- the entrance hole 221 is disposed between the partition member and the base member 21.
- FIG 3 is a perspective view of a portion of the enlarged mouth showing other embodiments of the coupling member.
- the coupling member 23 is formed to protrude on the outer peripheral surface of the guide tube 22
- the screw thread 231 is formed on the outer peripheral surface, female thread formed on the inner peripheral surface of the pile body 10 It can be configured to be screwed on.
- the screw body 231 of the outer peripheral surface of the coupling member 23 and the female thread of the inner circumferential surface of the pile body 10 may be screwed to couple the pile body 10 to the guide tube 22.
- the welding operation can be omitted, thereby eliminating defects due to welding and ensuring the safety of the operator.
- the coupling member 23 is formed to protrude on the outer peripheral surface of the guide tube 22 in contact with the inner circumferential surface of the pile body 10, the fastening member from the outside of the pile body 10 It is also possible to be configured to be coupled to the pile body (10) by.
- a bolt B may be used as an example of the fastening member.
- the pile body 10 has a through-hole formed so that the bolt (B) can penetrate, the outer peripheral surface of the coupling member 23 is a bolt hole formed with a screw thread on the inner peripheral surface so that one end of the bolt (B) can be inserted To form (H).
- FIG. 4 is a perspective view of the enlarged oral cavity showing before and after expansion of the expander.
- the coupling member 23 is a partition member as shown in FIG. 2, the partition member is provided at a position of each expansion body 24, and a lower end of the partition member protrudes a predetermined length below the pile body 10.
- An expansion guide part 244, which is a groove part into which the lower end of the partition member is inserted, may be formed in the expansion direction of the expansion body 24 on the upper surface of the expansion body 24.
- 4 (a) and 4 (b) show the enlarged diameter spheres 20 before and after expansion of the expander 24, respectively.
- the expansion member 24 may support the partition member. Sliding along, the sliding direction is guided stably.
- FIG. 5 is a view showing an embodiment of the present invention the front-end expansion stake consisting of a pile body separated into upper and lower members.
- the pile body 10 is divided into a lower member 11 to which the enlarged sphere 20 is coupled and an upper member 12 to be coupled to the upper portion of the lower member (11). Can be.
- the partition member is welded to the inside of the lower member 11, and then the lower member 11 and the upper member 12 can be combined. have.
- the upper member 12 and the lower member 11 can also be welded (W) coupled.
- Figure 6 is a view showing another embodiment of the present invention the front end-type pile consisting of a pile body separated into upper and lower members.
- the upper end of the lower member 11 is formed with a stepped portion 111 may be coupled so that the lower end of the upper member 12 is seated on the stepped portion (111).
- the stepped portion 111 stably couples the upper member 12 to the upper portion of the lower member 11.
- the vertical load of the upper member 12 is smoothly transmitted to the lower member 11 by the stepped portion 111.
- a thread 121 is formed on a lower outer circumferential surface of the upper member 12, and a female thread 112 is formed on an inner circumferential surface of the side surface of the stepped portion 111 of the lower member 11 to form an upper member 12 and a lower member. 11 can be screwed.
- FIG 7 and 8 are perspective views showing the coupling relationship between the lower end of the pile body and the expansion body.
- a plurality of guide rails 13 and 14, which are protrusions or grooves, are formed in the lower end of the pile body 10 in the extending direction of the expansion body 24, and the guide rail portion is formed on an upper surface of the expansion body 24.
- extension guide parts 244 and 245 which are grooves or protrusions engaged with each other may be formed.
- the guide rail portion 13 which is a protrusion of the lower end of the pile body 10
- the expansion guide portion 244 which is a groove formed on the upper surface of the expansion body 24, thereby sliding the expansion body 24. You can guide the direction.
- the expansion guide part 245, which is a protrusion formed on the upper surface of the expansion body 24, and the guide rail part 14, which is a groove part of the lower end of the pile body 10, are engaged with each other to slide in the expansion body 24.
- FIG. 9 is a perspective view showing another embodiment of the enlarged oral cavity.
- the tip expansion type pile of the present invention is coupled to the pile body 10, the pile body 10, the lower diameter sphere 20 is expanded by the pressure body 30 while being rotated with the rotation of the pile body (10)
- the enlarged sphere (20) the base member 21
- a guide tube 22 which is formed to protrude integrally with the center upper surface of the base member 21 so that the upper part is opened so that the press body 30 can enter from the upper part and a plurality of entrance holes 221 are formed on the outer circumferential surface thereof
- An upper guide member 25 having an upper through hole 251 formed at the center thereof to be coupled to the upper portion of the guide tube 22;
- a wing portion 241 formed between the base member 21 and the upper guide member 25 at a rear end of the wing portion 241 and the wing portion 241 having a cutting tool 242 formed thereon.
- An expansion body 24 composed of a portion 243; Characterized in that consists of.
- the tip expansion type pile is different from the tip expansion type pile shown in FIG. 1, and as shown in FIG. 9, the enlarged diameter hole 20 has a base member 21, a guide tube 22, an upper guide member 25, and an expansion body. It consists of 24.
- the guide tube 22 may be inserted into an upper through hole 251 of the upper guide member 25 so that a stepped portion may be formed at an upper end thereof to support the upper guide member 25.
- the guide tube 22 and the upper guide member 25 may be screwed or welded.
- the base member 21 and the guide tube 22 may be integrally formed by injection or 3D printer, or the like and may be manufactured by assembling the upper guide member 25 separately.
- the lower sheet may be used as the upper guide member 25.
- FIG. 10 is a cross-sectional perspective view of the present invention the front end type pile equipped with a reinforcing member.
- the upper guide member 25 may be coupled to the reinforcing member 26 is fixed in the pile body 10 is coupled to the pile body 10.
- the reinforcing member 26 may act as a tension material for applying prestress to the pile body 10 in the PHC pile, it may be configured as a steel wire or steel bar.
- the upper guide member 25 may serve as a tip reinforcing plate of the pile body 10.
- the reinforcing member 26 may be provided in plural along the outer circumferential surface of the guide tube 22.
- the lower end of the reinforcing member 26 is coupled to the upper guide member 25 through the coupling hole 252 and the upper end of the reinforcing member 26 is positioned in the pile body 10.
- the coupling hole 252 is the insertion hole and the reinforcing member 26 is inserted into the head portion ) To move horizontally to form a shape in which the fixing hole to which the head is locked is connected.
- the coupling hole 252 can be easily drilled into the upper guide member 25.
- the gap between the upper guide member 25 and the base member 21 may be configured to increase toward the outside.
- the base member 21, the wing portion 241 of the expansion body 24 is received toward the end side of the upper guide member 25 Since there is room in the space between the upper guide member 25, the expansion body 24 can be easily extended outward.
- the base member 21 may have an inclined surface 211 having a lower surface inclined upward.
- the inclined surface 211 can be formed in both the front end-type stake including the expansion sphere shown in FIG.
- FIG. 12 is a bottom perspective view of the expander formed with an extension guide.
- At least one of the lower surface of the upper guide member 25 or the upper surface of the base member 21 may be a guide rail portion that is a protrusion or groove in the expansion direction of the expansion body 24.
- 212 is formed, and an extension guide part 246 which is a groove part or a protrusion which is engaged with the guide rail part 212 may be formed at a portion corresponding to the guide rail part 212 of the extension body 24.
- the tip expansion type pile is expanded while the expansion sphere 20 is rotated while the wing portion 241 of the expansion body 24 cuts the surrounding ground, so the expansion body 24 rotates in the opposite direction of rotation by the resistance of the surrounding ground.
- the ground may not be expanded properly.
- the expansion body 24 forms a straight line in the expansion direction of the pile outer peripheral surface Since it expands, the extension direction of the expansion body 24 can be guided stably.
- FIG. 9 a guide rail portion 212 having a groove shape formed on an upper surface of the base member 21 is illustrated, and in FIG. 12, an extension guide portion 246 having a protrusion shape formed on the bottom surface of the expander 24 is illustrated.
- the guide rail portion 212 may be formed on the lower surface of the upper guide member 25, and the expansion guide portion 246 may be formed on the upper surface of the expansion body 24, and the upper surface and the upper guide member 25 of the base member 21 may be formed. It is also possible to form the guide rail portion 212 on the lower surface, respectively, and to form the extension guide portion 246 on the lower surface and the upper surface of the expansion body 24.
- the wing portion 241 of the expansion body 24 may be configured to be inclined when the thickness becomes thinner toward the outside.
- the cutting speed may be increased during the expansion operation.
- the expansion body 24 is slid out by the impact or vibration of the base member 21 to escape. Can be.
- the end of the wing portion 241 is made thin, in particular, upwardly inclined toward the end of the wing portion 241, it is expanded by the blow or vibration of the base member 21 during the driving operation of the driving pile or the operation of the drilling pile.
- the sieve 24 can be prevented from falling out on its own.
- the shape of the wing portion 241 as described above is applicable to both the tip expansion type pile including the expansion sphere shown in FIG.
- FIG. 13 is a perspective view of an enlarged oral cavity having a support wing
- FIG. 14 is a bottom perspective view of the expander having parallel upper and lower wings
- FIG. 15 is a cross-sectional view illustrating a coupling relationship between the lower end of the pile body and the expander. .
- the base member 21 of the base member 21 in the lower portion of each expansion body 24 to support the lower portion of the expansion body 24 A plurality of support wings 213 protruding outward may be formed.
- the base member 21 is provided only in the lower portion of the expansion body 24 without having a disc shape, and thus the amount of steel required for the enlarged diameter ball 20 can be saved.
- the wing portion 241 of the expansion body 24 is configured to have a thick thickness of the support wing 213 in parallel up and down, as shown in Figure 14, to prevent the support wing 213 from being deformed upwards desirable.
- the configuration of the support wing 213 can be applied to both the tip expansion type pile including the enlarged sphere shown in FIG.
- the wing portion 241 of the expansion body 24 may be configured to become thicker toward the outside in the expansion direction.
- the rigidity is weak. Thereby, the support wing 213 at the time of pile driving can be bent upward, making it difficult to expand the expansion body 24.
- the expansion body 24 can be easily extended outward even if the support blade 213 is deformed.
- 16 is a perspective view of an extension showing various embodiments of a cutting tip.
- the cutting tool 242 is a cutting tip 242a or a water jet injection nozzle 242b for spraying any one of high pressure water, flame or hot water. Can be configured.
- the cutting tool 242 is to diameter-cut the ground, it can be configured as a cutting tip 242a as shown in Fig. 16 (a).
- the cutting tip 242a may be to cut the ground to the desired dimensions, it is possible to form a cross-section of the pile enlargement of the designed dimensions.
- the cutting tool 242 may be configured as a water jet injection nozzle 242b as shown in (b) of FIG. 16, and may be configured to include both the cutting tip 242a and the water jet injection nozzle 242b. Do.
- the water jet injection nozzle 242b receives jet of any one of high pressure water, flame or hot water from the supply line 40 as shown in FIGS. Cut.
- Fig. 17 is a view showing the present invention front end expandable pile provided with conical penetrations
- Fig. 18 is a longitudinal cross-sectional view of the present invention the end extension type pile showing conical penetrations dropped by the filling material.
- a lower through hole 214 through which the press body 30 penetrates is formed at the center of the base member 21, and the base member 21 of the base member 21 is formed.
- the lower portion may be coupled to the conical intrusion 50 is reduced in diameter toward the lower portion.
- the conical inlet 50 is coupled to communicate with the lower through-hole 214 in the center of the base member 21, the side and the bottom is made of a closed cone shape so that the pile can be easily entered into the ground.
- the configuration of the conical penetration 50 is applicable to both the tip expansion type pile including the expansion sphere shown in FIG.
- an injection hole 51 is formed at a lower end of the conical penetration part 50, and an injection hole 51 is formed in the injection hole 51.
- a stopper 52 for selectively closing is provided, wherein the injection hole 51 has a stepped portion 511 formed at the bottom thereof, and the stopper 52 is a guide rod 521 inserted into the injection hole 51. And it is formed on the lower end of the guide rod 521 is characterized in that the diameter is configured to be composed of the engaging portion 522 to be caught on the stepped portion (511).
- the filling material 60 is injected from the inside of the enlarged oral cavity 20 so that the stopper 52 moves to the outside by the pressure of the filling material 60 to open the injection hole 51 (FIG. 17C). )). Accordingly, since the filler 60 flows out through the injection hole 51, the ground density can be increased.
- the conical penetration portion 50 may be fixedly coupled to the base member 21, but the base member 21 and the base member 21 to be separated from the base member 21 by the pressure in the enlarged diameter (20) as shown in FIG. Can be combined.
- the conical penetrating portion 50 In the case of pressurizing the conical penetrating portion 50 with the filling material 60 or pressurizing member 30 in the enlarged diameter sphere 20, the conical penetrating portion 50 is separated from the base member 21.
- 19 is a view showing another embodiment of the conical intrusion.
- the top of the conical penetration portion 50 is fitted into the lower through hole 214 of the base member 21 of the guide tube 22
- a fitting portion 53 having a cutout portion 531 is formed at a position corresponding to the entrance hole 221, and a stopper portion 54 formed on a lower surface of the base member 21 is formed at an outer side of the lower portion of the fitting portion 53.
- the fitting portion 53 When the fitting portion 53 is not present, if the pressure of the filling material 60 is not constant, the conical penetration part 50 may be separated from only one side, and the filling material 60 may be unevenly injected.
- the fitting portion 53 serves to guide the conical penetration portion 50 and the conical penetration portion 50 to be stably separated while at the same time serves to couple the expansion hole (20).
- the cutout 531 is a passage through which the pressurized portion 243 of the expander 24 is moved, and the cutout 531 is a filling material therein before the conical penetration 50 is completely separated from the enlarged oral cavity 20. Allow (60) to be injected early into the lower ground.
- the stopper portion 54 prevents the conical penetration portion 50 from being pushed into the enlarged orifice 20 during penetration.
- the outer diameter before the diameter of the enlarged diameter sphere 20 can be configured to be larger than the outer diameter of the pile body (10).
- the driving pile There are two methods for the construction of the driving pile: a method of constructing the pile with the driving force from the beginning, and a method of drilling the pile through the upper buried layer or the gypsum layer, penetrating the pile to the middle layer, and injecting the pile to the support layer by driving the pile.
- the tip-extended stake of the present invention may form the pile body 10 as a ready-made pile, or may be formed as a cast-in-place pile.
- the construction method of the tip-extended pile of the present invention first (a) to form a drill hole in the ground, (b) the expansion diameter 20 is coupled to the bottom of the pile main body 10 The extended tip pile is inserted into the drilled hole.
- the drilling hole may be formed by various methods such as boring or hitting.
- the pressing body 30 After expansion of the enlarged oral cavity 20, the pressing body 30 is recovered and the construction is completed by a process of filling the filling material in the empty space in the pile.
- the construction method of the tip expansion-type pile can be applied to both the tip expansion-type pile including the expansion sphere shown in FIG.
- the pile body 10 is a cast-in-place pile
- the construction method of the tip expansion type pile of the present invention (a) first to form a hole in the ground, and (b) the expansion hole 20 is inserted into the lower hole installation The step is performed.
- step (d) it is also possible to install reinforcing materials, such as reinforcing steel bars, FRP before concrete placement.
- the construction method of the tip expansion-type pile is applicable to the tip expansion-type pile including the expansion sphere shown in FIG.
- the construction method of the tip expansion type pile of the present invention (a) step of inserting the tip expansion type coupled to the expansion sphere 20 on the bottom of the pile body 10 by any one of the type, press-fit or rotary penetration ; And (b) inserting the press body 30 into the guide tube 22 while rotating the enlarged sphere 20 to press the end portion of the press unit 243 so that the expander 24 cuts the ground and the enlarged sphere 20 ) Extending outwardly; It may be configured to include.
- the construction method of the tip expansion-type pile can be applied to both the tip expansion-type pile including the expansion sphere shown in FIG.
- the present invention can expand the diameter of the diameter of the expansion sphere coupled to the lower pile body without additional drill drill to form a pile expansion at the same time to rapidly cut the pile tip ground in a variety of strata from soil layer to solid rock layer, accordingly
- As the allowable bearing capacity of piles is greatly increased it is possible to minimize the number of piles and to optimize the depth of excavation. Therefore, there is industrial applicability in that it can be widely applied to foundation piles of various construction and civil structures with excellent economic efficiency.
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Abstract
The present invention relates to a front-end-enlargeable pile and a method for constructing same, the front-end-enlargeable pile being capable of forming an enlarged pile part while swiftly cutting in a diameter-enlarging manner the ground around the front end of the pile in various strata by using simple equipment without a separate hole-enlarging drill, thereby significantly increasing the allowable bearing capacity of the pile. The front-end-enlargeable pile according to the present invention comprises: a main pile body; and a diameter-enlarging implement, which is coupled to the bottom of the main pile body, and the diameter of which is enlarged by a pressurizing member as the diameter-enlarging implement is rotated with the rotation of the main pile body, wherein the diameter-enlarging implement comprises: a base member; a guide tube, which integrally protrudes from the central upper surface of the base member, and the upper part of which is open so that the pressurizing member can enter therefrom, and which has a plurality of entry/exit holes formed on the outer circumferential surface thereof; a coupling member for fixing/coupling the guide tube inside the main pile body; and an enlarging member comprising blades, which are provided between the base member and the bottom of the main pile body and have cutting implements formed on the outer sides thereof, and pressurizing parts, which are provided at the rear ends of the blades, have one end positioned inside the guide tube through the entry/exit holes of the guide tube, and slide outside the guide tube by the pressurization of the pressurizing member, thereby enlarging the blades outward.
Description
본 발명은 별도의 확공드릴 없이 간단한 장비를 이용하여 다양한 지층에서 신속하게 말뚝 선단 지반을 확경 절삭함과 동시에 말뚝 확대부를 형성함으로써, 말뚝의 허용지지력을 크게 증가시킬 수 있는 선단 확장형 말뚝 및 이의 시공 방법에 대한 것이다.The present invention by using a simple equipment without a separate drill drill to expand the pile ground at the same time quickly by cutting the piling ground in various geometries at the same time to form a pile expansion, the tip expansion type pile and its construction method that can greatly increase the allowable bearing capacity of the pile It is about.
말뚝은 상부 구조물의 하중을 지지하는 것으로, 말뚝 시공을 위해서는 지반에 천공홀을 형성하는 과정이 선행되어야 한다. The pile is to support the load of the upper structure, the process of forming a hole in the ground must be preceded for the pile construction.
상기 천공홀은 지반 조건이나 말뚝 직경 등에 따라 다양한 시공법을 채택할 수 있으며, 어떤 시공법을 채택하는지에 따라 공기 및 공사비의 편차가 매우 크다. The drilling hole may adopt a variety of construction methods according to the ground conditions or pile diameter, and the deviation of air and construction cost is very large depending on which construction method is adopted.
일반적으로 말뚝은 선단지지력과 주면마찰력에 의하여 구조물을 지지하는데, 말뚝의 충분한 지지력 확보를 위해서는 말뚝 선단부의 확장을 통하여 선단지지력을 증가시키는 방법을 고려할 수 있다.In general, the pile supports the structure by the tip support force and the main frictional force, in order to secure a sufficient support force of the pile may be considered to increase the tip support force through the expansion of the pile tip.
종래 말뚝 선단부 확장을 위해서는 직천공 드릴로 암반층까지 수직천공을 진행하고 별도의 확공드릴로 천공홀의 선단을 확경하는 과정을 필요하다. 이후 천공홀 선단부의 잔여슬라임을 제거하고 확경홀의 공벽 이완을 안정화시킨 다음 말뚝 확대부 공간에 콘크리트를 타설하여 콘크리트 보강부를 형성하여야 한다. In order to extend the conventional tip end portion, it is necessary to proceed vertical drilling to the rock layer with a direct drilling drill and expand the tip of the drilling hole with a separate expansion drill. After that, the remaining slime at the tip of the drilled hole should be removed, and the relaxation of the hollow wall of the enlarged hole should be stabilized, and concrete should be poured into the pile expansion space to form the concrete reinforcement part.
그러나 이러한 종래기술은 사용 장비의 투입이 많고, 천공량이 필요 이상으로 많을 뿐 아니라 확경홀의 공벽이 이완되거나 무너지는 것을 방지하기 어려운 단점이 있었다. 또한, 말뚝 확대부 공간에 슬라임과 지하수가 공존하므로 콘크리트의 우수한 품질을 보장하기 어려웠다. However, this conventional technology has a lot of input of the equipment used, not only the amount of drilling more than necessary, but also had a disadvantage in that it is difficult to prevent the wall of the enlarged hole from being relaxed or collapsed. In addition, since the slime and the groundwater coexist in the pile enlargement space, it is difficult to guarantee the excellent quality of the concrete.
한편, 콘크리트기둥 하단에 PC강선의 일단이 관통되도록 콘크리트기둥 보다 큰 외경의 보강판을 결합함으로써, 말뚝 자체의 선단을 확장하는 보강판이 일체화된 PHC 파일에 대한 기술이 있다(등록특허 제 10-1150854호).On the other hand, by combining the reinforcement plate of the outer diameter larger than the concrete column so that one end of the PC steel wire penetrates the bottom of the concrete pillar, there is a technology for the PHC pile integrated with the reinforcement plate to extend the tip of the pile itself (Registration 10-1150854). number).
그러나 상기 등록특허는 말뚝 하부에 보강판이 부착된 것이어서, 말뚝 자체의 선단이 이미 확대되어 있으므로 말뚝 선단의 확장 지름이 천공홀의 지름보다 커지기 어려운 한계가 있다. 또한 단단한 지반에서는 적용이 곤란하고, 말뚝 선단의 증가된 직경으로 천공홀 전체를 형성하는 경우 말뚝 선단을 제외한 부분은 과대 천공이 되어 공기와 공사비를 크게 증가시키는 원인이 된다.However, since the registered patent has a reinforcing plate attached to the bottom of the pile, the tip of the pile itself is already enlarged, so the expanded diameter of the pile tip is difficult to be larger than the diameter of the hole. In addition, it is difficult to apply in the hard ground, and when forming the whole hole with the increased diameter of the pile tip, except for the pile tip is excessively perforated to cause a large increase in air and construction costs.
이에 드릴 몸통과 동일한 직경의 수직천공과 단계별 천공홀 확장이 가능한 지반 굴착용 드릴을 이용하여 말뚝 선단을 부분적으로 확공할 수 있는 기술이 제안되었다(공개특허 제10-2013-0057161호). In this regard, a technique for partially expanding the tip of the pile by using a ground drilling drill capable of vertical drilling and drill hole expansion in stages having the same diameter as the drill body has been proposed (Publication Patent No. 10-2013-0057161).
그러나 상기 공개특허의 기술을 이용하여 지반을 굴착하는 경우, 시간이 오래 걸리고 장비가 대형으로 협소한 장소에서 진행하기 어려운 단점이 있다.However, when the ground is excavated using the technique of the above patent, it takes a long time and has a disadvantage that it is difficult to proceed in a place where equipment is large and narrow.
본 발명은 별도의 확공드릴 없이 간단한 장비를 이용하여 다양한 지층에서 신속하게 말뚝 선단 지반을 확경 절삭함과 동시에 말뚝 확대부를 형성함으로써, 말뚝의 허용지지력을 증가시킬 수 있는 선단 확장형 말뚝 및 이의 시공 방법을 제공하고자 한다. The present invention by using a simple equipment without a separate drill drill to expand the pile piling ground at the same time and quickly to form a pile expansion, to increase the permissible bearing capacity of the pile, and the construction method thereof To provide.
본 발명은 외측에 절삭팁이 장착된 견고한 확장체가 지반을 확경 절삭함으로써, 최소한의 확경 절삭으로 경제성이 뛰어나고 신속한 시공이 가능한 선단 확장형 말뚝 및 이의 시공 방법을 제공하고자 한다. The present invention is to provide a tip expansion type pile and its construction method which is excellent in economic efficiency and quick construction with minimal diameter cutting by a solid expansion body equipped with a cutting tip on the outside diameter-cutting the ground.
본 발명은 확경 절삭과 동시에 말뚝 확대부가 형성되어, 확경홀의 공벽이 이완되거나 무너지는 것을 방지할 수 있는 선단 확장형 말뚝 및 이의 시공 방법을 제공하고자 한다.The present invention is to provide a tip expansion-type pile and its construction method that can be prevented from being relaxed or collapsed by the expansion of the pile at the same time the diameter expansion cutting.
본 발명은 보다 간단한 구성으로 말뚝 확대부를 형성할 수 있는 선단 확장형 말뚝 및 이의 시공 방법을 제공하고자 한다.The present invention is to provide a tip expansion type pile and a construction method thereof that can form a pile expansion with a simpler configuration.
바람직한 실시예에 따른 본 발명은 말뚝 본체, 말뚝 본체 하부에 결합되어 말뚝 본체의 회전과 함께 회전되면서 가압체에 의해 지름이 확장되는 확경구로 구성되는 선단 확장형 말뚝에 관한 것으로, 상기 확경구는, 베이스부재; 상기 베이스부재 중앙 상면에 일체로 돌출 형성되는 것으로 상부에서 가압체가 진입할 수 있도록 상부가 개방되고 외주면에 복수의 진출입공이 형성된 가이드관; 상기 가이드관을 말뚝 본체 내부에 고정 결합하는 결합부재; 및 상기 베이스부재와 말뚝 본체 하부 사이에 구비되는 것으로 외측에 절삭구가 형성된 날개부 및 상기 날개부 후단에 구비되어 일단이 상기 가이드관의 진출입공을 관통하여 가이드관 내에 위치하는 것으로 가압체의 가압에 의해 가이드관 외부로 슬라이딩 이동함으로써 날개부를 외부로 확장하는 가압부로 구성되는 확장체; 로 구성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.The present invention according to a preferred embodiment relates to a front end expansion type pile consisting of a diameter expansion by the pressurized body while being coupled to the pile body, the lower portion of the pile main body is rotated with the rotation of the pile body, A base member; A guide tube which is integrally formed on the upper surface of the center of the base member so that the upper part is opened to allow the press body to enter from the upper part and a plurality of entrance holes are formed on the outer circumferential surface; A coupling member fixedly coupling the guide tube to the pile body; And a base provided between the base member and the lower portion of the pile main body, and a wing having a cutting tool formed at an outer side thereof, and a rear end of the wing unit, one end of which penetrates the entrance hole of the guide tube and is positioned in the guide tube. An expansion body consisting of a pressing portion for extending the wing portion by sliding the outside of the guide tube by the outside; Provides a front end expandable pile, characterized in that consisting of.
다른 바람직한 실시예에 따른 본 발명은 상기 결합부재는 말뚝 본체 내면과 가이드관 외면을 연결하는 복수의 격벽부재인 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the coupling member provides a front end-type pile, characterized in that a plurality of partition members connecting the inner surface of the pile body and the guide tube.
다른 바람직한 실시예에 따른 본 발명은 상기 말뚝 본체는 확경구가 결합되는 하부부재와 상기 하부부재 상부에 결합되는 상부부재로 분할되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another exemplary embodiment of the present invention, the pile body is provided with a front end expandable pile, which is divided into a lower member to which an enlarged orifice is coupled and an upper member to be coupled to an upper portion of the lower member.
다른 바람직한 실시예에 따른 본 발명은 상기 하부부재의 상단 내측에는 단턱부가 형성되어 상기 상부부재의 하단이 단턱부에 안착되도록 결합되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, a stepped portion is formed inside the upper end of the lower member to provide an extended end-type pile, characterized in that the lower end of the upper member is coupled to be seated on the stepped portion.
다른 바람직한 실시예에 따른 본 발명은 상기 상부부재의 하부 외주면에는 나사산이 형성되고, 상기 하부부재의 단턱부 측면 내주면에는 암나사산이 형성되어 상부부재와 하부부재가 나사 결합되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.In accordance with another aspect of the present invention, a screw thread is formed on a lower outer circumferential surface of the upper member, and a female thread is formed on a side inner circumferential surface of the stepped portion of the lower member so that the upper member and the lower member are screwed together. To provide.
다른 바람직한 실시예에 따른 본 발명은 상기 결합부재는 가이드관 외주면에 돌출 형성된 것으로 외주면에 나사산이 형성되어, 말뚝 본체 내주면에 형성된 암나사산에 나사 결합되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the coupling member is formed to protrude on the outer circumferential surface of the guide tube, and a thread is formed on the outer circumferential surface, thereby providing a tip-extended pile, which is screwed to a female thread formed on the inner circumferential surface of the pile body.
다른 바람직한 실시예에 따른 본 발명은 상기 결합부재는 가이드관 외주면에 돌출 형성된 것으로 말뚝 본체 내주면에 접하고, 말뚝 본체 외부에서 체결부재에 의해 말뚝 본체와 결합되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the coupling member protrudes on the outer circumferential surface of the guide tube and contacts the inner circumferential surface of the pile body, and provides a tip-expanded pile that is coupled to the pile body by a fastening member outside the pile body.
다른 바람직한 실시예에 따른 본 발명은 상기 격벽부재는 각 확장체의 위치에 구비되되, 상기 격벽부재의 하단은 말뚝 본체 하부로 일정 길이 돌출되고, 상기 확장체의 상면에는 상기 격벽부재의 하단이 삽입되는 홈부인 확장안내부가 확장체의 확장 방향으로 형성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another exemplary embodiment of the present invention, the partition member is provided at the position of each expansion body, and the lower end of the partition member protrudes a predetermined length to the bottom of the pile body, and the lower end of the partition member is inserted into the upper surface of the expansion body. Expanded guide portion which is a groove portion to be provided in the front expansion type pile, characterized in that formed in the expansion direction of the expansion body.
다른 바람직한 실시예에 따른 본 발명은 상기 말뚝 본체의 하단에는 확장체의 확장 방향으로 돌부 또는 홈부인 복수의 가이드레일부가 형성되고, 상기 확장체의 상면에는 상기 가이드레일부에 대응되어 맞물리는 홈부 또는 돌부인 확장안내부가 형성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another exemplary embodiment of the present invention, a plurality of guide rails, which are protrusions or grooves, are formed at a lower end of the pile body, and a groove portion corresponding to the guide rail portion is engaged on an upper surface of the extension body. It provides a tip expansion type pile, characterized in that the expansion guide is formed as a protrusion.
아울러 바람직한 실시예에 따른 본 발명은 말뚝 본체, 말뚝 본체 하부에 결합되어 말뚝 본체의 회전과 함께 회전되면서 가압체에 의해 지름이 확장되는 확경구로 구성되는 선단 확장형 말뚝에 관한 것으로, 상기 확경구는, 베이스부재; 상기 베이스부재 중앙 상면에 일체로 돌출 형성되는 것으로 상부에서 가압체가 진입할 수 있도록 상부가 개방되고 외주면에 복수의 진출입공이 형성된 가이드관; 상기 가이드관 상부에 결합되는 것으로 중앙에 상부관통공이 형성된 상부가이드부재; 및 상기 베이스부재와 상부가이드부재 사이에 구비되는 것으로 외측에 절삭구가 형성된 날개부 및 상기 날개부 후단에 구비되는 것으로 일단이 상기 가이드관의 진출입공을 관통하여 가이드관 내에 위치하여 가압체의 가압에 의해 가이드관 외부로 슬라이딩 이동함으로써 날개부를 외부로 확장하는 가압부로 구성되는 확장체; 로 구성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.In addition, the present invention according to a preferred embodiment relates to a front end expansion type pile consisting of a diameter expansion by the pressurized body while being rotated with the rotation of the pile body is coupled to the pile body, the pile main body, the expansion sphere is A base member; A guide tube which is integrally formed on the upper surface of the center of the base member so that the upper part is opened to allow the press body to enter from the upper part and a plurality of entrance holes are formed on the outer circumferential surface; An upper guide member coupled to an upper portion of the guide tube and having an upper through hole formed at a center thereof; And a wing portion having a cutting hole formed on the outside and a rear end portion of the wing portion provided between the base member and the upper guide member, one end of which penetrates the entrance hole of the guide tube and is located in the guide tube to pressurize the pressure body. An expansion body consisting of a pressing portion for extending the wing portion by sliding the outside of the guide tube by the outside; Provides a front end expandable pile, characterized in that consisting of.
다른 바람직한 실시예에 따른 본 발명은 상기 상부가이드부재에는 말뚝 본체 내에 정착되어 말뚝 본체와 결합되는 보강부재가 결합되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the upper guide member is provided with a tip-extended pile, characterized in that the reinforcing member is fixed to the pile body and coupled to the pile body.
다른 바람직한 실시예에 따른 본 발명은 상기 상부가이드부재의 상부관통공 주위에는 상기 보강부재의 단부가 삽입되어 결합되는 복수의 결합공이 형성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.The present invention according to another preferred embodiment provides a tip-expanded pile, characterized in that a plurality of coupling holes are formed to be coupled to the end of the reinforcing member is inserted around the upper through hole of the upper guide member.
다른 바람직한 실시예에 따른 본 발명은 상기 상부가이드부재와 베이스부재 사이 간격은 바깥쪽으로 갈수록 커지는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.The present invention according to another preferred embodiment provides a tip-extended pile, characterized in that the gap between the upper guide member and the base member increases toward the outside.
다른 바람직한 실시예에 따른 본 발명은 상기 베이스부재는 하면이 외측으로 상향 경사진 경사면이 형성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the base member provides a front end-type pile, characterized in that the inclined surface is inclined upwardly outward.
다른 바람직한 실시예에 따른 본 발명은 상기 상부가이드부재 하면 또는 베이스부재의 상면 중 적어도 어느 하나 이상에는 확장체의 확장 방향으로 돌부 또는 홈부인 가이드레일부가 형성되고, 상기 확장체의 상기 가이드레일부에 대응되는 부위에는 상기 가이드레일부에 맞물리는 홈부 또는 돌부인 확장안내부가 형성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another exemplary embodiment of the present invention, at least one or more of the lower surface of the upper guide member or the upper surface of the base member is provided with a guide rail portion that is a protrusion or groove in the expansion direction of the expansion body, and the guide rail portion of the expansion body. Corresponding site provides a tip-extended pile, characterized in that the expansion guide is formed in the groove or protrusion engaging the guide rail.
다른 바람직한 실시예에 따른 본 발명은 상기 확장체의 날개부는 외측으로 갈수록 두께가 얇아지도록 하면이 경사진 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.The present invention according to another preferred embodiment provides a tip-extended pile, characterized in that the lower surface is inclined so that the thickness of the wing portion of the expansion toward the outside.
다른 바람직한 실시예에 따른 본 발명은 상기 베이스부재는 확장체의 하부를 지지하도록 각 확장체의 하부에 베이스부재의 외측으로 돌출되는 복수의 지지날개가 형성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the base member provides a tip-extended pile, characterized in that a plurality of support wings protruding outward of the base member is formed at the bottom of each extension to support the bottom of the extension. .
다른 바람직한 실시예에 따른 본 발명은 상기 확장체의 날개부는 확장 방향인 외측으로 갈수록 두께가 두꺼워지는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.The present invention according to another preferred embodiment provides a tip-extended pile, characterized in that the thickness of the wing portion of the expansion toward the outside in the expansion direction becomes thicker.
다른 바람직한 실시예에 따른 본 발명은 상기 절삭구는 절삭팁이거나 고압력수, 화염 또는 열수 중 어느 하나를 분사하는 워터제트 분사노즐인 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the cutting tool provides a tip-extended pile, characterized in that the cutting tip or a water jet injection nozzle for spraying any one of high pressure water, flame or hot water.
다른 바람직한 실시예에 따른 본 발명은 상기 베이스부재의 중앙에는 가압체가 관통되는 하부관통공이 형성되고, 상기 베이스부재의 하부에는 하부로 갈수록 지름이 작아지는 원추형관입부가 결합되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the lower end of the base member is formed with a through-hole through which a press body penetrates, and the lower end of the base member is characterized in that the conical inlet is reduced in diameter toward the lower portion thereof. To provide.
다른 바람직한 실시예에 따른 본 발명은 상기 원추형관입부의 하단에는 주입공이 관통 형성되고, 상기 주입공에는 주입공을 선택적으로 폐쇄하는 마개가 구비되되, 상기 주입공은 하부에 단턱부가 형성되고, 상기 마개는 상기 주입공에 삽입되는 가이드봉 및 상기 가이드봉 하단에 형성되는 것으로 지름이 확대되어 상기 단턱부에 걸리는 걸림부로 구성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another exemplary embodiment of the present invention, an injection hole is formed at a lower end of the conical penetration part, and a stopper is formed in the injection hole to selectively close the injection hole, and the injection hole has a stepped portion formed at the lower part of the injection hole. The guide rod is inserted into the injection hole and is formed at the lower end of the guide rod provides a tip-extended pile, characterized in that consisting of the engaging portion is caught in the stepped portion is expanded diameter.
다른 바람직한 실시예에 따른 본 발명은 상기 원추형관입부는 확경구 내부에서의 가압에 의해 베이스부재와 분리되도록 베이스부재와 결합되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.According to another preferred embodiment of the present invention, the conical penetration provides a front-end expansion pile, characterized in that coupled to the base member to be separated from the base member by the pressure inside the expansion sphere.
다른 바람직한 실시예에 따른 본 발명은 상기 원추형관입부 상단에는 베이스부재의 하부관통공에 끼움 결합되는 것으로 상기 가이드관의 진출입공에 대응되는 위치에 절개부가 형성된 끼움부가 형성되고, 상기 끼움부 하단 외측에는 베이스부재 하면에 걸리는 스토퍼부가 형성되는 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.The present invention according to another preferred embodiment is fitted into the lower through-hole of the base member in the upper end of the conical inlet is formed in the fitting portion formed with a cutout at a position corresponding to the entrance hole of the guide tube, the outside of the lower portion of the fitting It provides a front end-type pile, characterized in that the stopper portion is formed on the lower surface of the base member.
다른 바람직한 실시예에 따른 본 발명은 상기 확경구의 확경 전 외경은 말뚝 본체의 외경보다 큰 것을 특징으로 하는 선단 확장형 말뚝을 제공한다.The present invention according to another preferred embodiment provides a front-end expansion type pile, characterized in that the outer diameter before expansion of the expansion sphere is larger than the outer diameter of the pile body.
또한, 바람직한 실시예에 따른 본 발명은 상기 선단 확장형 말뚝을 시공하는 방법에 관한 것으로, (a) 지반에 천공홀을 형성하는 단계; (b) 말뚝 본체 저면에 확경구가 결합된 선단 확장형 말뚝을 천공홀 내부에 삽입하는 단계; 및 (c) 확경구를 회전시키면서 가이드관 내에 가압체를 삽입하여 가압부의 단부를 가압하여 확장체가 지반을 절삭하면서 확경구 외부로 확장되도록 하는 단계; 를 포함하여 구성되는 것을 특징으로 하는 선단 확장형 말뚝의 시공 방법을 제공한다.In addition, the present invention according to a preferred embodiment relates to a method for constructing the tip expansion type pile, (a) forming a hole in the ground; (b) inserting a tip-expanded pile having an enlarged orifice coupled to the bottom of the pile body into a drilling hole; And (c) inserting a press body into the guide tube while rotating the enlarged sphere to press the end portion of the press unit so that the expander extends out of the enlarged sphere while cutting the ground. It provides a construction method of the tip expansion-type pile, characterized in that comprising a.
다른 바람직한 실시예에 따른 본 발명은 상기 선단 확장형 말뚝을 시공하는 방법에 관한 것으로, (a) 지반에 천공홀을 형성하는 단계; (b) 확경구를 천공홀 하부에 삽입 설치하는 단계; (c) 확경구를 회전시키면서 가이드관 내에 가압체를 삽입하여 가압부의 단부를 가압하여 확장체가 지반을 절삭하면서 확경구 외부로 확장되도록 하는 단계; 및 (d) 상기 확경구 상부에 콘크리트를 타설하여 현장타설말뚝을 형성하는 단계; 를 포함하여 구성되는 것을 특징으로 하는 선단 확장형 말뚝의 시공 방법을 제공한다.The present invention according to another preferred embodiment relates to a method for constructing the tip expansion type pile, (a) forming a hole in the ground; (b) inserting the enlarged orifice into the lower portion of the drilling hole; (c) inserting a press body into the guide tube while rotating the enlarged orifice to press the end of the press to allow the expander to extend out of the enlarged oral cavity while cutting the ground; And (d) pouring concrete on the enlarged sphere to form a cast-in-place pile; It provides a construction method of the tip expansion-type pile, characterized in that comprising a.
다른 바람직한 실시예에 따른 본 발명은 상기 선단 확장형 말뚝을 시공하는 방법에 관한 것으로, (a) 말뚝 본체 저면에 확경구가 결합된 선단 확장형 말뚝을 타입, 압입 또는 회전관입 중 어느 하나에 의해 지중에 삽입하는 단계; 및 (b) 확경구를 회전시키면서 가이드관 내에 가압체를 삽입하여 가압부의 단부를 가압하여 확장체가 지반을 절삭하면서 확경구 외부로 확장되도록 하는 단계; 를 포함하여 구성되는 것을 특징으로 하는 선단 확장형 말뚝의 시공 방법을 제공한다.The present invention according to another preferred embodiment relates to a method for constructing the tip-expansion pile, (a) the expansion-expanded pile coupled to the bottom of the pile main body by any one of the type, press-fit or rotary penetration Inserting; And (b) inserting a press body into the guide tube while rotating the enlarged sphere to press the end portion of the press unit so that the expander extends out of the enlarged sphere while cutting the ground. It provides a construction method of the tip expansion-type pile, characterized in that comprising a.
본 발명에 따르면 다음과 같은 효과가 있다. According to the present invention has the following effects.
첫째, 별도의 확공드릴 없이 말뚝 본체 하부에 결합되는 확경구의 지름을 확대시켜 토사층에서 단단한 암반층까지 다양한 지층에서 신속하게 말뚝 선단 지반을 확경 절삭함과 동시에 말뚝 확대부를 형성할 수 있다. 이에 따라 말뚝의 본당 허용지지력이 크게 증가되므로, 말뚝 수량의 최소화 및 굴착 심도의 최적화가 가능하다. 따라서 뛰어난 경제성으로 각종 건축·토목 구조물의 기초용 말뚝에 광범위하게 적용할 수 있다.First, by expanding the diameter of the enlarged sphere coupled to the bottom of the pile body without a separate drill drill, it is possible to rapidly expand the pile tip ground in a variety of strata from the soil layer to the solid rock layer to form a pile enlargement. Accordingly, the allowable bearing capacity of the pile is greatly increased, thereby minimizing the number of piles and optimizing the drilling depth. Therefore, it can be widely applied to foundation piles of various construction and civil engineering structures with excellent economic efficiency.
둘째, 말뚝 확대부 체적만큼만 국부적으로 확장 천공할 수 있어 지반 천공량을 최소로 할 수 있다. 또한, 수평 방사상 확장되는 절삭팁에 의하여 과도한 절삭 없이 설계된 치수의 말뚝 확대부 단면을 제공해 줄 수 있으므로, 최소의 절삭작업량과 최소의 확장체 수량으로 지지력과 인발저항력을 크게 증가시킬 수 있다. Secondly, it is possible to locally drill only as much as the volume of the pile expansion part, so the ground drilling amount can be minimized. In addition, the horizontal radially expanding cutting tip can provide a pile enlargement cross section of the designed dimension without excessive cutting, thereby significantly increasing the bearing capacity and the pullout resistance with the minimum amount of cutting work and the minimum number of expansion bodies.
셋째, 확장체에 결합된 절삭팁이 지반을 확경 절삭하는 동안 경질의 연속된 말뚝 확대부가 시공되므로, 작업 중 확경홀의 공벽이 이완되거나 무너지지 않는다.Third, since the hard continuous pile enlargement is constructed while the cutting tip coupled to the expander cuts the ground, the hollow wall of the enlarged hole does not relax or collapse during operation.
넷째, 콤팩트한 장비의 사용으로 공간의 효율적 이용이 가능하다.Fourth, the use of compact equipment enables efficient use of space.
다섯째, 베이스부재 하부에 원추형관입부가 구비되는 경우에는 가압 초기에 하부 슬라임이 확경구 내로 유입되는 것을 방지할 수 있고, 가압 후 주입공을 통하여 채움재를 배출함으로써 하부 지반 밀도를 증가시킬 수 있다. Fifth, when the conical penetration portion is provided in the lower portion of the base member can prevent the lower slime from flowing into the enlarged sphere at the initial stage of pressurization, it is possible to increase the lower ground density by discharging the filling material through the injection hole after pressing.
여섯째, 확장체가 말뚝 본체 하단과 베이스부재 사이에서 슬라이딩 가이드 되므로, 구성이 간단하여 제작 및 유지·관리가 용이하다.Sixth, because the expansion body is a sliding guide between the lower end of the pile body and the base member, the configuration is simple and easy to manufacture and maintain.
일곱째, 확경구의 베이스부재와 가이드관을 일체로 형성하고 상부가이드부재를 별도로 제작하여 조립하는 경우, PHC 파일의 하부 마구리판을 상부가이드부재로 활용할 수 있다.Seventh, when the base member and the guide tube of the enlarged oral cavity is integrally formed and the upper guide member is manufactured and assembled separately, the lower corner plate of the PHC pile may be used as the upper guide member.
여덟째, 베이스부재 하면에 외측으로 갈수록 상향 경사진 경사면을 형성하는 경우 항타시 관입이 용이하다. 또한, 확장체의 날개부를 외측으로 갈수록 두께가 얇아지도록 하면이 경사지게 구성하는 경우 절삭 속도 증가와 함께 확장체의 탈락을 방지할 수 있다.Eighth, when the inclined surface is inclined upward toward the outer side of the base member it is easy to penetrate during driving. In addition, when the lower surface is inclined so as to become thinner toward the outside of the wing portion of the expansion body can be prevented from falling off with an increase in cutting speed.
아홉째, 베이스부재에 확장체의 하부를 지지하는 지지날개를 형성하는 경우, 확경구 제작에 소요되는 강재량을 절약할 수 있어 경제적이다.Ninth, when forming a support wing for supporting the lower portion of the expansion member in the base member, it is economical to save the amount of steel required for the manufacture of expansion balls.
열째, 확경구의 확경 전 외경을 말뚝 본체의 외경보다 크게 하는 경우, 말뚝 본체와 주변지반 사이에 일정한 공간이 형성되므로, 말뚝 본체의 회전에 의한 확경 작업이 용이하다.Tenth, when the outer diameter before the expansion diameter of the enlarged diameter sphere is larger than the outer diameter of the pile body, a constant space is formed between the pile body and the surrounding ground, it is easy to increase the diameter work by the rotation of the pile body.
도 1은 본 발명 선단 확장형 말뚝의 사시도.1 is a perspective view of the tip expansion type pile according to the present invention.
도 2는 결합부재의 실시예가 도시된 확경구 일부의 사시도.Figure 2 is a perspective view of a portion of the enlarged sphere showing an embodiment of the coupling member.
도 3은 결합부재의 다른 실시예들이 도시된 확경구 일부의 사시도. 3 is a perspective view of a portion of the enlarged mouth showing other embodiments of the coupling member.
도 4는 확장체의 확장 전후를 나타내는 확경구의 사시도.4 is a perspective view of a magnifying sphere showing before and after expansion of the expander;
도 5는 상하부부재로 분리된 말뚝 본체를 포함하여 구성되는 본 발명 선단 확장형 말뚝의 실시예를 도시하는 도면.5 is a view showing an embodiment of the present invention the front end-type pile consisting of a pile body separated into upper and lower members.
도 6은 상하부부재로 분리된 말뚝 본체를 포함하여 구성되는 본 발명 선단 확장형 말뚝의 다른 실시예를 도시하는 도면.Figure 6 is a view showing another embodiment of the present invention the front end-type pile consisting of a pile body separated by upper and lower members.
도 7 및 도 8은 말뚝 본체 하단과 확장체의 결합 관계를 도시하는 사시도.7 and 8 are perspective views showing the coupling relationship between the pile body bottom and the expansion body.
도 9는 확경구의 다른 실시예를 도시하는 사시도.9 is a perspective view showing another embodiment of the enlarged oral cavity.
도 10은 보강부재가 구비된 본 발명 선단 확장형 말뚝의 단면사시도.10 is a cross-sectional perspective view of the present invention the front end-type pile equipped with a reinforcing member.
도 11은 말뚝 본체 하단과 확장체 사이의 결합 관계를 도시하는 단면도. 11 is a cross-sectional view showing a coupling relationship between the pile body lower end and the expansion body.
도 12는 확장안내부가 형성된 확장체의 저면사시도.12 is a bottom perspective view of the expander formed with an extension guide.
도 13은 지지날개가 구비된 확경구의 사시도.Figure 13 is a perspective view of a magnifying glass provided with a support wing.
도 14는 날개부 상하면이 평행하게 구성되는 확장체의 저면사시도.14 is a bottom perspective view of the expander in which the upper and lower surfaces of the wing are configured in parallel.
도 15는 말뚝 본체 하단과 확장체 사이의 결합 관계를 도시하는 단면도.15 is a cross-sectional view showing a coupling relationship between the pile body lower end and the expansion body.
도 16은 절삭팁의 다양한 실시예들을 도시하는 확장체의 사시도.16 is a perspective view of an extension showing various embodiments of a cutting tip.
도 17은 원추형관입부가 구비된 본 발명 선단 확장형 말뚝을 도시하는 도면.17 is a view showing the present invention the front end expansion pile equipped with a conical penetration.
도 18은 채움재의 가압에 의하여 탈락되는 원추형관입부를 도시하는 본 발명 선단 확장형 말뚝의 종단면도.18 is a longitudinal sectional view of the present invention, the tip expansion type pile showing a conical intrusion dropped by the pressure of the filler.
도 19는 원추형관입부의 다른 실시예를 도시하는 도면.19 shows another embodiment of the conical penetration.
본 발명의 선단 확장형 말뚝은 말뚝 본체, 말뚝 본체 하부에 결합되어 말뚝 본체의 회전과 함께 회전되면서 가압체에 의해 지름이 확장되는 확경구로 구성되는 것으로, 상기 확경구는, 베이스부재; 상기 베이스부재 중앙 상면에 일체로 돌출 형성되는 것으로 상부에서 가압체가 진입할 수 있도록 상부가 개방되고 외주면에 복수의 진출입공이 형성된 가이드관; 상기 가이드관을 말뚝 본체 내부에 고정 결합하는 결합부재; 및 상기 베이스부재와 말뚝 본체 하부 사이에 구비되는 것으로 외측에 절삭구가 형성된 날개부 및 상기 날개부 후단에 구비되어 일단이 상기 가이드관의 진출입공을 관통하여 가이드관 내에 위치하는 것으로 가압체의 가압에 의해 가이드관 외부로 슬라이딩 이동함으로써 날개부를 외부로 확장하는 가압부로 구성되는 확장체; 로 구성되는 것을 특징으로 한다.The tip expansion type pile of the present invention is composed of a diameter-expanded diameter by the pressure body while being coupled to the pile body, the pile body lower coupled to the pile body, the expansion sphere, the base member; A guide tube which is integrally formed on the upper surface of the center of the base member so that the upper part is opened to allow the press body to enter from the upper part and a plurality of entrance holes are formed on the outer circumferential surface; A coupling member fixedly coupling the guide tube to the pile body; And a base provided between the base member and the lower portion of the pile main body, and a wing having a cutting tool formed at an outer side thereof, and a rear end of the wing unit, one end of which penetrates the entrance hole of the guide tube and is positioned in the guide tube. An expansion body consisting of a pressing portion for extending the wing portion by sliding the outside of the guide tube by the outside; Characterized in that consists of.
이하, 첨부한 도면 및 바람직한 실시예에 따라 본 발명을 상세히 설명한다. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
도 1은 본 발명 선단 확장형 말뚝의 사시도이다.1 is a perspective view of the tip expansion type pile according to the present invention.
도 1에 도시된 바와 같이, 본 발명의 선단 확장형 말뚝은 말뚝 본체(10), 말뚝 본체(10) 하부에 결합되어 말뚝 본체(10)의 회전과 함께 회전되면서 가압체(30)에 의해 지름이 확장되는 확경구(20)로 구성된다.As shown in Figure 1, the tip expansion type pile of the present invention is coupled to the pile body 10, the lower portion of the pile body 10 is rotated with the rotation of the pile body 10, the diameter by the pressing body 30 It consists of an enlarged oral diameter (20).
상기 말뚝 본체(10)는 기성콘크리트 말뚝 또는 강관 말뚝으로 구성할 수 있으며, 상기 확경구(20)는 말뚝 본체(10)의 회전에 따라 회전 가능하다. 이 경우 말뚝 본체(10)의 회전과 함께 확경구(20)의 확장체(24)가 방사상으로 확장하여 말뚝 확대부를 형성한다.The pile body 10 may be composed of a ready-made concrete pile or steel pipe pile, the expansion sphere 20 is rotatable in accordance with the rotation of the pile body (10). In this case, with the rotation of the pile body 10, the expansion body 24 of the enlarged orifice 20 expands radially to form a pile expansion portion.
또한, 상기 말뚝 본체(10)는 현장타설말뚝으로 구성할 수 있다. 이 경우, 말뚝 본체(10)와 별도로 확경구(20)만 먼저 회전시켜 지반을 확경 절삭한 다음, 말뚝 본체(10)를 나중에 설치한다.In addition, the pile body 10 may be configured as a cast-in-place pile. In this case, the diameter of the ground is cut by rotating only the diameter sphere 20 separately from the pile body 10 first, and then the pile body 10 is installed later.
상기 확경구(20)는 별도의 확공드릴 없이 말뚝 선단에 말뚝 본체(10)보다 지름이 확장된 말뚝 확대부를 신속하게 형성하는 부분으로, 베이스부재(21), 가이드관(22), 결합부재(23) 및 확장체(24)를 포함하여 구성된다. The enlarged diameter hole 20 is a portion for rapidly forming a pile enlarged portion having a diameter larger than that of the pile body 10 at the tip of the pile without an additional drilling drill, the base member 21, the guide tube 22, and the coupling member ( 23) and the expansion body 24 is comprised.
상기 베이스부재(21)는 확경구(20)의 저면에 위치되는 것으로, 후술할 도 10의 (b)에 도시된 바와 같이 베이스부재(21)의 중앙에는 가압체(30)가 관통되는 하부관통공(214)이 형성될 수 있다.The base member 21 is located on the bottom surface of the enlarged oral cavity 20, and as shown in (b) of FIG. 10 to be described later, a lower portion through which the press body 30 penetrates in the center of the base member 21 will be described. A ball 214 can be formed.
상기 베이스부재(21)와 말뚝 본체(10)는 그 사이에 구비된 확장체(24)의 수평 방향 확장을 가이드 한다.The base member 21 and the pile body 10 guide the horizontal expansion of the expansion body 24 provided therebetween.
상기 가이드관(22)은 베이스부재(21) 중앙 상면에 일체로 돌출 형성되는 것으로 상부에서 가압체(30)가 진입할 수 있도록 상부가 개방되고 외주면에 복수의 진출입공(221)이 형성된다.The guide tube 22 is formed to protrude integrally on the upper surface of the center of the base member 21, the upper portion is opened so that the press body 30 can enter from the upper portion, and a plurality of entrance holes 221 are formed on the outer circumferential surface.
상기 가이드관(22)은 결합부재(23)에 의하여 말뚝 본체(10) 내부에 고정 결합된다. 결합부재(23)의 다양한 실시예는 도 2 및 도 3을 참고하여 설명한다.The guide tube 22 is fixedly coupled to the inside of the pile body 10 by the coupling member (23). Various embodiments of the coupling member 23 will be described with reference to FIGS. 2 and 3.
상기 확장체(24)는 상기 베이스부재(21)와 말뚝 본체(10) 하부 사이에 구비되는 것으로, 날개부(241)와 가압부(243)로 구성된다.The expansion body 24 is provided between the base member 21 and the lower portion of the pile body 10, and is composed of a wing part 241 and a pressing part 243.
상기 날개부(241)와 가압부(243)는 상호 일체 또는 분리 구성 가능하며, 확장체(24)는 복수 개 구비될 수 있다.The wing 241 and the pressing portion 243 may be integrally or separated from each other, a plurality of expansion bodies 24 may be provided.
상기 날개부(241)는 외측에 지반을 확경 절삭하는 절삭구(242)가 형성된다.The wing 241 is formed with a cutting tool 242 for diameter-cutting the ground on the outside.
상기 가압부(243)는 상기 날개부(241) 후단에 구비되어 일단이 상기 가이드관(22)의 진출입공(221)을 관통하여 가이드관(22) 내에 위치하는 것으로, 가압체(30)의 가압에 의해 가이드관(22) 외부로 슬라이딩 이동함으로써 날개부(241)를 외부로 확장한다. The pressurizing portion 243 is provided at the rear end of the wing portion 241, and one end thereof passes through the entrance and exit hole 221 of the guide tube 22 and is positioned in the guide tube 22. The wing part 241 is expanded to the outside by slidingly moving out of the guide pipe 22 by pressurization.
따라서 가이드관(22) 내측에서 가압체(30)가 가압부(243)를 가압하면, 가압부(243)가 진출입공(221)을 통하여 가이드관(22) 외부로 슬라이딩 된다. 이에 따라 베이스부재(21) 상면과 말뚝 본체(10) 하단 사이에서 가압부(243) 전단에 위치하는 날개부(241)가 함께 외부로 확장하므로, 확장체(24)가 말뚝 본체(10) 외부로 돌출되어 확경구(20)의 지름을 확대한다.Therefore, when the pressurizer 30 presses the pressurizing portion 243 inside the guide tube 22, the pressurizing portion 243 slides out of the guide tube 22 through the entrance hole 221. Accordingly, since the wing portion 241 positioned at the front end of the pressing portion 243 extends together between the upper surface of the base member 21 and the lower end of the pile body 10, the expansion body 24 extends outside the pile body 10. Protrudes to enlarge the diameter of the enlarged sphere (20).
상기 확장체(24)는 말뚝 시공 완료 후 확대된 상태로 말뚝 확대부의 영구적인 보강재 역할을 한다. The expansion body 24 serves as a permanent reinforcement of the pile expansion portion in the expanded state after completion of the pile construction.
이로써, 선단지지력 추가 확보로 말뚝의 본당 허용지지력이 크게 증가되므로, 말뚝 수량의 최소화 및 굴착 심도의 최적화로 경제적인 시공이 가능하다. 아울러 말뚝 확대부 체적만큼만 국부적으로 확장 천공되므로 지반 천공량을 최소로 할 수 있다. 따라서 뛰어난 경제성으로 각종 건축·토목 구조물의 기초용 말뚝에 광범위하게 적용할 수 있다.As a result, the allowable bearing capacity of the pile is greatly increased by securing the tip bearing capacity, and thus economical construction is possible by minimizing the number of piles and optimizing the drilling depth. In addition, it is possible to minimize the amount of ground perforation since it locally expands and drills only the volume of the pile expansion part. Therefore, it can be widely applied to foundation piles of various construction and civil engineering structures with excellent economic efficiency.
상기 확장체(24)는 가압체(30)의 타격 또는 진동에 의한 가압력과 말뚝 본체(10)의 회전력을 이용하여 지반을 확경 절삭할 수 있다. 따라서 지반 절삭 속도가 빠르고, 토사층에서 암반층까지 다양한 지층에서 지반을 확경 절삭할 수 있다.The expansion body 24 may diameter-cut the ground by using the pressing force caused by the hit or vibration of the pressing body 30 and the rotational force of the pile body 10. Therefore, the ground cutting speed is high, and the ground can be cut in various layers from the soil layer to the rock layer.
도 2는 결합부재의 실시예가 도시된 확경구 일부의 사시도이다.Figure 2 is a perspective view of a portion of the enlarged sphere showing an embodiment of the coupling member.
도 2의 (a) 내지 (b)에서 볼 수 있는 바와 같이, 상기 결합부재(23)는 말뚝 본체(10) 내면과 가이드관(22) 외면을 연결하는 복수의 격벽부재로 구성할 수 있다.As can be seen in (a) to (b) of Figure 2, the coupling member 23 may be composed of a plurality of partition members connecting the inner surface of the pile body 10 and the outer surface of the guide tube 22.
이 경우 말뚝 본체(10)는 강관 말뚝으로 구성된다.In this case, the pile body 10 is composed of a steel pipe pile.
상기 격벽부재는 도 2의 (a)에서와 같이 수직 방향으로 배치되거나, 도 2의 (b)에서와 같이 수평 방향으로 배치될 수 있다.The partition member may be disposed in a vertical direction as in FIG. 2A or in a horizontal direction as in FIG. 2B.
상기 격벽부재는 내측 단부가 가이드관(22)에 일체로 결합되며, 외측 단부를 말뚝 본체(10) 내면에 용접하여 말뚝 본체(10)와 가이드관(22)을 결합할 수 있다.The partition member has an inner end integrally coupled to the guide tube 22, and the outer end may be welded to the inner surface of the pile body 10 to couple the pile body 10 to the guide tube 22.
상기 격벽부재는 가이드관(22)에 형성된 진출입공(221)과 서로 간섭되지 않는 위치에 결합되어야 한다. 도 2의 실시예에서 진출입공(221)은 격벽부재와 베이스부재(21) 사이 부분에 배치하였다.The partition member should be coupled to a position not interfere with the entrance hole 221 formed in the guide tube 22. In the embodiment of FIG. 2, the entrance hole 221 is disposed between the partition member and the base member 21.
도 3은 결합부재의 다른 실시예들이 도시된 확경구 일부의 사시도이다.3 is a perspective view of a portion of the enlarged mouth showing other embodiments of the coupling member.
도 3의 (a)에서 볼 수 있는 바와 같이, 상기 결합부재(23)는 가이드관(22) 외주면에 돌출 형성된 것으로 외주면에 나사산(231)이 형성되어, 말뚝 본체(10) 내주면에 형성된 암나사산에 나사 결합되도록 구성할 수 있다.As can be seen in Figure 3 (a), the coupling member 23 is formed to protrude on the outer peripheral surface of the guide tube 22, the screw thread 231 is formed on the outer peripheral surface, female thread formed on the inner peripheral surface of the pile body 10 It can be configured to be screwed on.
따라서 결합부재(23) 외주면의 나사산(231)과 말뚝 본체(10) 내주면의 암나사산을 나사 결합하여 말뚝 본체(10)와 가이드관(22)을 결합할 수 있다.Therefore, the screw body 231 of the outer peripheral surface of the coupling member 23 and the female thread of the inner circumferential surface of the pile body 10 may be screwed to couple the pile body 10 to the guide tube 22.
이 경우 도 2의 실시예와는 달리 용접 작업을 생략할 수 있으므로, 용접으로 인한 결함을 배제하고 작업자의 안전을 확보할 수 있다.In this case, unlike the embodiment of FIG. 2, the welding operation can be omitted, thereby eliminating defects due to welding and ensuring the safety of the operator.
아울러 도 3의 (b)에서 볼 수 있는 바와 같이, 상기 결합부재(23)는 가이드관(22) 외주면에 돌출 형성된 것으로 말뚝 본체(10) 내주면에 접하고, 말뚝 본체(10) 외부에서 체결부재에 의해 말뚝 본체(10)와 결합되도록 구성하는 것도 가능하다.In addition, as can be seen in Figure 3 (b), the coupling member 23 is formed to protrude on the outer peripheral surface of the guide tube 22 in contact with the inner circumferential surface of the pile body 10, the fastening member from the outside of the pile body 10 It is also possible to be configured to be coupled to the pile body (10) by.
상기 체결부재의 일례로 볼트(B)를 이용할 수 있다.As an example of the fastening member, a bolt B may be used.
이 경우, 말뚝 본체(10)에는 볼트(B)가 관통할 수 있도록 관통홀을 형성하며, 결합부재(23)의 외주면에는 볼트(B)의 일단이 삽입될 수 있도록 내주면에 나사산이 형성된 볼트홀(H)을 형성하도록 한다.In this case, the pile body 10 has a through-hole formed so that the bolt (B) can penetrate, the outer peripheral surface of the coupling member 23 is a bolt hole formed with a screw thread on the inner peripheral surface so that one end of the bolt (B) can be inserted To form (H).
도 4는 확장체의 확장 전후를 나타내는 확경구의 사시도이다.4 is a perspective view of the enlarged oral cavity showing before and after expansion of the expander.
도 2에서와 같이 결합부재(23)가 격벽부재인 경우, 상기 격벽부재는 각 확장체(24)의 위치에 구비되되, 상기 격벽부재의 하단은 말뚝 본체(10) 하부로 일정 길이 돌출되고, 상기 확장체(24)의 상면에는 상기 격벽부재의 하단이 삽입되는 홈부인 확장안내부(244)가 확장체(24)의 확장 방향으로 형성될 수 있다.When the coupling member 23 is a partition member as shown in FIG. 2, the partition member is provided at a position of each expansion body 24, and a lower end of the partition member protrudes a predetermined length below the pile body 10. An expansion guide part 244, which is a groove part into which the lower end of the partition member is inserted, may be formed in the expansion direction of the expansion body 24 on the upper surface of the expansion body 24.
도 4의 (a)와 (b)는 각각 확장체(24)의 확장 전과 후의 확경구(20)를 도시한다. 4 (a) and 4 (b) show the enlarged diameter spheres 20 before and after expansion of the expander 24, respectively.
도 4의 (a)와 (b)에서 볼 수 있는 바와 같이, 격벽부재의 하단을 확장체(24)의 확장안내부(244) 부분까지 하부로 연장하면, 확장체(24)가 격벽부재를 따라 슬라이딩 되므로 슬라이딩 방향이 안정적으로 가이드 된다.As shown in (a) and (b) of FIG. 4, when the lower end of the partition member extends downward to the portion of the extension guide portion 244 of the expansion member 24, the expansion member 24 may support the partition member. Sliding along, the sliding direction is guided stably.
도 5는 상하부부재로 분리된 말뚝 본체를 포함하여 구성되는 본 발명 선단 확장형 말뚝의 실시예를 도시하는 도면이다.5 is a view showing an embodiment of the present invention the front-end expansion stake consisting of a pile body separated into upper and lower members.
도 5 및 도 6에서 볼 수 있는 바와 같이, 상기 말뚝 본체(10)는 확경구(20)가 결합되는 하부부재(11)와 상기 하부부재(11) 상부에 결합되는 상부부재(12)로 분할될 수 있다.As can be seen in Figures 5 and 6, the pile body 10 is divided into a lower member 11 to which the enlarged sphere 20 is coupled and an upper member 12 to be coupled to the upper portion of the lower member (11). Can be.
도 2에서와 같이 결합부재(23)가 격벽부재인 경우, 격벽부재의 외측 단부는 말뚝 본체(10) 내부에 용접 결합되어야 한다.2, when the coupling member 23 is a partition member, an outer end of the partition member must be welded to the inside of the pile body 10.
따라서 말뚝 본체(10)를 상부부재(12)와 하부부재(11)로 분할하면, 하부부재(11) 내부에 격벽부재를 용접한 후 하부부재(11)와 상부부재(12)를 결합할 수 있다.Therefore, when the pile body 10 is divided into the upper member 12 and the lower member 11, the partition member is welded to the inside of the lower member 11, and then the lower member 11 and the upper member 12 can be combined. have.
도 5의 (b)에 도시된 단면도에서 볼 수 있는 바와 같이, 상기 상부부재(12)와 하부부재(11)도 용접(W) 결합 가능하다.As can be seen in the cross-sectional view shown in Figure 5 (b), the upper member 12 and the lower member 11 can also be welded (W) coupled.
도 6은 상하부부재로 분리된 말뚝 본체를 포함하여 구성되는 본 발명 선단 확장형 말뚝의 다른 실시예를 도시하는 도면이다.Figure 6 is a view showing another embodiment of the present invention the front end-type pile consisting of a pile body separated into upper and lower members.
도 6에서와 같이, 상기 하부부재(11)의 상단 내측에는 단턱부(111)가 형성되어 상기 상부부재(12)의 하단이 단턱부(111)에 안착되도록 결합될 수 있다.As shown in Figure 6, the upper end of the lower member 11 is formed with a stepped portion 111 may be coupled so that the lower end of the upper member 12 is seated on the stepped portion (111).
상기 단턱부(111)는 상부부재(12)를 하부부재(11) 상부에 안정적으로 결합한다.The stepped portion 111 stably couples the upper member 12 to the upper portion of the lower member 11.
상기 상부부재(12)의 수직하중은 단턱부(111)에 의해 하부부재(11)에 원활하게 전달된다.The vertical load of the upper member 12 is smoothly transmitted to the lower member 11 by the stepped portion 111.
아울러 상기 상부부재(12)의 하부 외주면에는 나사산(121)이 형성되고, 상기 하부부재(11)의 단턱부(111) 측면 내주면에는 암나사산(112)이 형성되어 상부부재(12)와 하부부재(11)가 나사 결합될 수 있다.In addition, a thread 121 is formed on a lower outer circumferential surface of the upper member 12, and a female thread 112 is formed on an inner circumferential surface of the side surface of the stepped portion 111 of the lower member 11 to form an upper member 12 and a lower member. 11 can be screwed.
이 경우 도 6의 (b)에 도시된 단면도에서와 같이, 상부부재(12)와 하부부재(11)가 간단하게 나사 결합되므로, 용접 결합에 의한 용접 결함이나 변형 등의 문제가 발생하지 않는다.In this case, since the upper member 12 and the lower member 11 are simply screwed together, as in the cross-sectional view shown in FIG. 6 (b), problems such as welding defects or deformation due to welding coupling do not occur.
도 7 및 도 8은 말뚝 본체 하단과 확장체의 결합 관계를 도시하는 사시도이다.7 and 8 are perspective views showing the coupling relationship between the lower end of the pile body and the expansion body.
상기 말뚝 본체(10)의 하단에는 확장체(24)의 확장 방향으로 돌부 또는 홈부인 복수의 가이드레일부(13, 14)가 형성되고, 상기 확장체(24)의 상면에는 상기 가이드레일부(13, 14)에 대응되어 맞물리는 홈부 또는 돌부인 확장안내부(244, 245)가 형성될 수 있다.A plurality of guide rails 13 and 14, which are protrusions or grooves, are formed in the lower end of the pile body 10 in the extending direction of the expansion body 24, and the guide rail portion is formed on an upper surface of the expansion body 24. 13 and 14, extension guide parts 244 and 245 which are grooves or protrusions engaged with each other may be formed.
따라서 도 7에서와 같이, 확장체(24) 상면에 형성된 홈부인 확장안내부(244)에 말뚝 본체(10) 하단의 돌부인 가이드레일부(13)가 삽입되어, 확장체(24)의 슬라이딩 방향을 가이드 할 수 있다.Therefore, as shown in FIG. 7, the guide rail portion 13, which is a protrusion of the lower end of the pile body 10, is inserted into the expansion guide portion 244, which is a groove formed on the upper surface of the expansion body 24, thereby sliding the expansion body 24. You can guide the direction.
또는 도 8에서와 같이, 확장체(24)의 상면에 형성된 돌부인 확장안내부(245)와 말뚝 본체(10) 하단의 홈부인 가이드레일부(14)가 맞물려 확장체(24)의 슬라이딩 방향을 가이드 할 수 있다.Alternatively, as shown in FIG. 8, the expansion guide part 245, which is a protrusion formed on the upper surface of the expansion body 24, and the guide rail part 14, which is a groove part of the lower end of the pile body 10, are engaged with each other to slide in the expansion body 24. Can guide.
도 9는 확경구의 다른 실시예를 도시하는 사시도이다.9 is a perspective view showing another embodiment of the enlarged oral cavity.
본 발명의 선단 확장형 말뚝은 말뚝 본체(10), 말뚝 본체(10) 하부에 결합되어 말뚝 본체(10)의 회전과 함께 회전되면서 가압체(30)에 의해 지름이 확장되는 확경구(20)로 구성되는 것으로, 상기 확경구(20)는, 베이스부재(21); 상기 베이스부재(21) 중앙 상면에 일체로 돌출 형성되는 것으로 상부에서 가압체(30)가 진입할 수 있도록 상부가 개방되고 외주면에 복수의 진출입공(221)이 형성된 가이드관(22); 상기 가이드관(22) 상부에 결합되는 것으로 중앙에 상부관통공(251)이 형성된 상부가이드부재(25); 및 상기 베이스부재(21)와 상부가이드부재(25) 사이에 구비되는 것으로 외측에 절삭구(242)가 형성된 날개부(241) 및 상기 날개부(241) 후단에 구비되는 것으로 일단이 상기 가이드관(22)의 진출입공(221)을 관통하여 가이드관(22) 내에 위치하여 가압체(30)의 가압에 의해 가이드관(22) 외부로 슬라이딩 이동함으로써 날개부(241)를 외부로 확장하는 가압부(243)로 구성되는 확장체(24); 로 구성되는 것을 특징으로 한다.The tip expansion type pile of the present invention is coupled to the pile body 10, the pile body 10, the lower diameter sphere 20 is expanded by the pressure body 30 while being rotated with the rotation of the pile body (10) To be configured, the enlarged sphere (20), the base member 21; A guide tube 22 which is formed to protrude integrally with the center upper surface of the base member 21 so that the upper part is opened so that the press body 30 can enter from the upper part and a plurality of entrance holes 221 are formed on the outer circumferential surface thereof; An upper guide member 25 having an upper through hole 251 formed at the center thereof to be coupled to the upper portion of the guide tube 22; And a wing portion 241 formed between the base member 21 and the upper guide member 25 at a rear end of the wing portion 241 and the wing portion 241 having a cutting tool 242 formed thereon. Pressing through the entrance and exit hole 221 of the 22 to be located in the guide tube 22 to slide the outside of the guide tube 22 by the pressure of the pressing body 30 to expand the wing portion 241 to the outside An expansion body 24 composed of a portion 243; Characterized in that consists of.
이 경우 선단 확장형 말뚝은 도 1에 도시된 선단 확장형 말뚝과는 달리, 도 9에서와 같이 확경구(20)가 베이스부재(21), 가이드관(22), 상부가이드부재(25) 및 확장체(24)로 구성된다.In this case, the tip expansion type pile is different from the tip expansion type pile shown in FIG. 1, and as shown in FIG. 9, the enlarged diameter hole 20 has a base member 21, a guide tube 22, an upper guide member 25, and an expansion body. It consists of 24.
상기 가이드관(22)은 상부가이드부재(25)의 상부관통공(251)에 끼워져 상부가이드부재(25)를 지지하도록 상단에 단턱부가 형성될 수 있다. The guide tube 22 may be inserted into an upper through hole 251 of the upper guide member 25 so that a stepped portion may be formed at an upper end thereof to support the upper guide member 25.
상기 가이드관(22)과 상부가이드부재(25)는 나사 또는 용접 결합할 수 있다. The guide tube 22 and the upper guide member 25 may be screwed or welded.
특히, 나사 결합의 경우에는 상부가이드부재(25)의 상부관통공(251) 내측과 가이드관(22)의 상부 외측면에 상호 대응되는 형상으로 나사산을 형성하고 이들을 상호 나사 결합할 수 있다.In particular, in the case of screw coupling, it is possible to form a screw thread in a shape corresponding to each other on the inner side of the upper through hole 251 of the upper guide member 25 and the upper outer surface of the guide tube 22 and screw them together.
제작 편의상 상기 베이스부재(21)와 가이드관(22)은 사출 또는 3D 프린터 등에 의하여 일체로 형성하고, 상부가이드부재(25)를 별도로 제작하여 조립할 수 있다.For the convenience of production, the base member 21 and the guide tube 22 may be integrally formed by injection or 3D printer, or the like and may be manufactured by assembling the upper guide member 25 separately.
원심 성형법에 의하여 공장 생산되는 고강도 프리스트레스트 콘크리트 말뚝인 PHC 파일(prestressed high-strength concrete pile)의 경우, 하부 마구리판을 상부가이드부재(25)로 활용할 수 있다.In the case of PHS pile (prestressed high-strength concrete pile), which is a high-strength prestressed concrete pile produced by a centrifugal molding method, the lower sheet may be used as the upper guide member 25.
도 9에 도시된 확경구 및 이를 포함하여 구성되는 선단 확장형 말뚝은 결합부재(23) 대신 상부가이드부재(25)가 이용되는 것을 제외하고는 다른 구성 및 각 구성의 역할은 앞서 도 1에서 설명한 바와 동일하다.9 and other expansion and role of each configuration is the same as that described in FIG. same.
도 10은 보강부재가 구비된 본 발명 선단 확장형 말뚝의 단면사시도이다.10 is a cross-sectional perspective view of the present invention the front end type pile equipped with a reinforcing member.
도 10의 (b)에서 볼 수 있는 바와 같이, 상기 상부가이드부재(25)에는 말뚝 본체(10) 내에 정착되어 말뚝 본체(10)와 결합되는 보강부재(26)가 결합될 수 있다.As can be seen in Figure 10 (b), the upper guide member 25 may be coupled to the reinforcing member 26 is fixed in the pile body 10 is coupled to the pile body 10.
상기 보강부재(26)는 PHC 파일에서 말뚝 본체(10)에 프리스트레스를 가하기 위한 긴장재 역할을 할 수 있으며, 강선 또는 강봉 등으로 구성 가능하다.The reinforcing member 26 may act as a tension material for applying prestress to the pile body 10 in the PHC pile, it may be configured as a steel wire or steel bar.
이 경우 상기 상부가이드부재(25)는 말뚝 본체(10)의 선단보강판 역할을 할 수 있다. In this case, the upper guide member 25 may serve as a tip reinforcing plate of the pile body 10.
상기 보강부재(26)는 가이드관(22)의 외주면을 따라 복수 개 구비될 수 있다.The reinforcing member 26 may be provided in plural along the outer circumferential surface of the guide tube 22.
도 10의 (a)에서 볼 수 있는 바와 같이, 상기 상부가이드부재(25)의 상부관통공(251) 주위에는 상기 보강부재(26)의 단부가 삽입되어 결합되는 복수의 결합공(252)이 형성될 수 있다.As can be seen in Figure 10 (a), around the upper through hole 251 of the upper guide member 25 a plurality of coupling holes 252 is inserted into the end of the reinforcing member 26 is coupled Can be formed.
따라서 보강부재(26)의 하단은 결합공(252)을 관통하여 상부가이드부재(25)에 결합하고 보강부재(26)의 상단은 말뚝 본체(10) 내부에 위치시킨다.Therefore, the lower end of the reinforcing member 26 is coupled to the upper guide member 25 through the coupling hole 252 and the upper end of the reinforcing member 26 is positioned in the pile body 10.
이때, 도 10의 (b) 및 도 11에서 볼 수 있는 바와 같이, 보강부재(26) 하단에는 확대된 헤드부를 형성하고, 상기 결합공(252)은 상기 헤드부가 삽입되는 삽입공과 보강부재(26)를 수평 이동하여 상기 헤드부가 걸림되는 고정공이 연접된 모양으로 형성할 수 있다. At this time, as can be seen in Figure 10 (b) and 11, the bottom of the reinforcing member 26 to form an enlarged head portion, the coupling hole 252 is the insertion hole and the reinforcing member 26 is inserted into the head portion ) To move horizontally to form a shape in which the fixing hole to which the head is locked is connected.
전술한 바와 같이, 베이스부재(21)와 상부가이드부재(25)는 분리 제작 가능하므로, 상부가이드부재(25)에 결합공(252)을 쉽게 천공할 수 있다.As described above, since the base member 21 and the upper guide member 25 can be manufactured separately, the coupling hole 252 can be easily drilled into the upper guide member 25.
도 11은 말뚝 본체 하단과 확장체 사이의 결합 관계를 도시하는 단면도이다.It is sectional drawing which shows the coupling relationship between the pile body lower end and an expansion body.
상기 상부가이드부재(25)와 베이스부재(21) 사이 간격은 바깥쪽으로 갈수록 커지도록 구성할 수 있다.The gap between the upper guide member 25 and the base member 21 may be configured to increase toward the outside.
즉, 도 11에서 볼 수 있는 바와 같이 t1 < t2가 되도록 구성하는 경우, 상부가이드부재(25)의 단부 측으로 갈수록 확장체(24)의 날개부(241)가 수납되는 베이스부재(21)와 상부가이드부재(25) 사이 공간에 여유가 생기므로, 확장체(24)가 바깥으로 쉽게 확장될 수 있다.That is, when it is configured to be t 1 <t 2 as can be seen in Figure 11, the base member 21, the wing portion 241 of the expansion body 24 is received toward the end side of the upper guide member 25 Since there is room in the space between the upper guide member 25, the expansion body 24 can be easily extended outward.
아울러 상기 베이스부재(21)는 하면이 외측으로 상향 경사진 경사면(211)이 형성될 수 있다.In addition, the base member 21 may have an inclined surface 211 having a lower surface inclined upward.
상기 경사면(211)에 의하여 항타시 하부 흙이 주변으로 밀려나므로, 지반에 관입하기 용이하다.Since the lower soil is pushed to the periphery by the inclined surface 211, it is easy to penetrate into the ground.
상기 경사면(211)은 도 1 또는 도 9에 도시된 확경구를 포함하는 선단 확장형 말뚝에 모두 형성 가능하다.The inclined surface 211 can be formed in both the front end-type stake including the expansion sphere shown in FIG.
도 12는 확장안내부가 형성된 확장체의 저면사시도이다.12 is a bottom perspective view of the expander formed with an extension guide.
도 9, 도 12에서 볼 수 있는 바와 같이, 상기 상부가이드부재(25) 하면 또는 베이스부재(21)의 상면 중 적어도 어느 하나 이상에는 확장체(24)의 확장 방향으로 돌부 또는 홈부인 가이드레일부(212)가 형성되고, 상기 확장체(24)의 상기 가이드레일부(212)에 대응되는 부위에는 상기 가이드레일부(212)에 맞물리는 홈부 또는 돌부인 확장안내부(246)가 형성될 수 있다.9 and 12, at least one of the lower surface of the upper guide member 25 or the upper surface of the base member 21 may be a guide rail portion that is a protrusion or groove in the expansion direction of the expansion body 24. 212 is formed, and an extension guide part 246 which is a groove part or a protrusion which is engaged with the guide rail part 212 may be formed at a portion corresponding to the guide rail part 212 of the extension body 24. have.
상기 선단 확장형 말뚝은 확경구(20)가 회전하여 확장체(24)의 날개부(241)가 주변지반을 절삭하면서 확장되므로, 주변지반의 저항에 의해 회전 반대 방향으로 확장체(24)가 회전하여 지반이 제대로 확경되지 않을 수 있다.The tip expansion type pile is expanded while the expansion sphere 20 is rotated while the wing portion 241 of the expansion body 24 cuts the surrounding ground, so the expansion body 24 rotates in the opposite direction of rotation by the resistance of the surrounding ground. The ground may not be expanded properly.
그러나 상기와 같이 상기 가이드레일부(212)와 확장안내부(246)가 서로 맞물리게 구성하면, 확장체(24)가 말뚝 외주면 확장 방향으로 정확하게 일직선을 이루며 확장되므로 확장체(24)의 확장 방향을 안정적으로 가이드할 수 있다.However, when the guide rail portion 212 and the expansion guide portion 246 is configured to engage with each other as described above, the expansion body 24 forms a straight line in the expansion direction of the pile outer peripheral surface Since it expands, the extension direction of the expansion body 24 can be guided stably.
도 9에서는 베이스부재(21) 상면에 형성된 홈부 형상의 가이드레일부(212)가 도시되고, 도 12에서는 확장체(24) 하면에 형성된 돌부 형상의 확장안내부(246)가 도시된다.In FIG. 9, a guide rail portion 212 having a groove shape formed on an upper surface of the base member 21 is illustrated, and in FIG. 12, an extension guide portion 246 having a protrusion shape formed on the bottom surface of the expander 24 is illustrated.
물론 상부가이드부재(25) 하면에 가이드레일부(212)를 형성하고 확장체(24) 상면에 확장안내부(246)를 형성할 수 있으며, 베이스부재(21) 상면과 상부가이드부재(25) 하면에 각각 가이드레일부(212)를 형성하고 확장체(24)의 하면과 상면에 확장안내부(246)를 형성하는 것도 가능하다.Of course, the guide rail portion 212 may be formed on the lower surface of the upper guide member 25, and the expansion guide portion 246 may be formed on the upper surface of the expansion body 24, and the upper surface and the upper guide member 25 of the base member 21 may be formed. It is also possible to form the guide rail portion 212 on the lower surface, respectively, and to form the extension guide portion 246 on the lower surface and the upper surface of the expansion body 24.
도 12에서와 같이, 상기 확장체(24)의 날개부(241)는 외측으로 갈수록 두께가 얇아지도록 하면이 경사지게 구성될 수 있다.As shown in Figure 12, the wing portion 241 of the expansion body 24 may be configured to be inclined when the thickness becomes thinner toward the outside.
날개부(241)의 단부를 얇게 하면 확장 작업시 절삭 속도를 증가시킬 수 있다.When the end of the wing 241 is thinned, the cutting speed may be increased during the expansion operation.
또한, 날개부(241) 하면에 경사가 없거나 날개부(241) 단부로 갈수록 하향 경사지도록 형성하면, 베이스부재(21)의 타격 또는 진동에 의하여 확장체(24)가 외부로 미끄러져 나가 이탈할 수 있다. In addition, if there is no inclination on the lower surface of the wing portion 241 or is formed to be inclined downward toward the edge of the wing portion 241, the expansion body 24 is slid out by the impact or vibration of the base member 21 to escape. Can be.
그러나 날개부(241)의 단부를 얇게 하되, 특히 날개부(241) 단부로 갈수록 상향 경사지게 형성하면, 항타말뚝의 항타 작업 또는 천공말뚝의 경타 작업시 베이스부재(21)의 타격 또는 진동에 의해 확장체(24)가 저절로 탈락되는 것을 방지할 수 있다.However, if the end of the wing portion 241 is made thin, in particular, upwardly inclined toward the end of the wing portion 241, it is expanded by the blow or vibration of the base member 21 during the driving operation of the driving pile or the operation of the drilling pile. The sieve 24 can be prevented from falling out on its own.
상기와 같은 날개부(241)의 형상은 도 1 또는 도 9에 도시된 확경구를 포함하는 선단 확장형 말뚝에 모두 적용 가능하다.The shape of the wing portion 241 as described above is applicable to both the tip expansion type pile including the expansion sphere shown in FIG.
도 13은 지지날개가 구비된 확경구의 사시도이고, 도 14는 날개부 상하면이 평행하게 구성되는 확장체의 저면사시도이며, 도 15는 말뚝 본체 하단과 확장체 사이의 결합 관계를 도시하는 단면도이다.FIG. 13 is a perspective view of an enlarged oral cavity having a support wing, and FIG. 14 is a bottom perspective view of the expander having parallel upper and lower wings, and FIG. 15 is a cross-sectional view illustrating a coupling relationship between the lower end of the pile body and the expander. .
도 13의 (a) 내지 (b)에서 볼 수 있는 바와 같이, 상기 베이스부재(21)는 확장체(24)의 하부를 지지하도록 각 확장체(24)의 하부에 베이스부재(21)의 외측으로 돌출되는 복수의 지지날개(213)가 형성될 수 있다.As can be seen from (a) to (b) of Figure 13, the base member 21 of the base member 21 in the lower portion of each expansion body 24 to support the lower portion of the expansion body 24 A plurality of support wings 213 protruding outward may be formed.
즉, 베이스부재(21)를 원판 형상으로 하지 않고 확장체(24) 하부에만 구비하여, 확경구(20) 제작에 소요되는 강재량을 절약할 수 있다.That is, the base member 21 is provided only in the lower portion of the expansion body 24 without having a disc shape, and thus the amount of steel required for the enlarged diameter ball 20 can be saved.
이 경우 확장체(24)의 날개부(241)는 도 14에서와 같이 지지날개(213) 부분을 상하 평행하게 두께가 두껍도록 구성하여, 지지날개(213)가 상부로 변형되는 것을 방지함이 바람직하다.In this case, the wing portion 241 of the expansion body 24 is configured to have a thick thickness of the support wing 213 in parallel up and down, as shown in Figure 14, to prevent the support wing 213 from being deformed upwards desirable.
상기 지지날개(213)의 구성은 도 1 또는 도 9에 도시된 확경구를 포함하는 선단 확장형 말뚝에 모두 적용 가능하다.The configuration of the support wing 213 can be applied to both the tip expansion type pile including the enlarged sphere shown in FIG.
도 15에서 볼 수 있는 바와 같이, 지지날개(213)가 구비되는 경우, 상기 확장체(24)의 날개부(241)는 확장 방향인 외측으로 갈수록 두께가 두꺼워지도록 구성할 수 있다.As can be seen in Figure 15, when the support wing 213 is provided, the wing portion 241 of the expansion body 24 may be configured to become thicker toward the outside in the expansion direction.
상기 복수의 지지날개(213)는 각각 서로 분리되어 있으므로 강성이 약하다. 이에 따라 말뚝 항타시 지지날개(213)가 상부로 휘어 확장체(24)의 확장을 곤란하게 할 수 있다.Since the plurality of support wings 213 are separated from each other, the rigidity is weak. Thereby, the support wing 213 at the time of pile driving can be bent upward, making it difficult to expand the expansion body 24.
따라서 t3 < t4가 되도록 확장체(24)의 날개부(241)를 경사지게 구성하면, 지지날개(213)가 변형되어도 확장체(24)가 쉽게 바깥으로 확장될 수 있다.Therefore, when the wing portion 241 of the expansion body 24 is inclined such that t 3 <t 4 , the expansion body 24 can be easily extended outward even if the support blade 213 is deformed.
도 16은 절삭팁의 다양한 실시예들을 도시하는 확장체의 사시도이다.16 is a perspective view of an extension showing various embodiments of a cutting tip.
도 16의 (a) 내지 (b)에서 볼 수 있는 바와 같이, 상기 절삭구(242)는 절삭팁(242a)이거나 고압력수, 화염 또는 열수 중 어느 하나를 분사하는 워터제트 분사노즐(242b)로 구성할 수 있다.As shown in FIGS. 16A to 16B, the cutting tool 242 is a cutting tip 242a or a water jet injection nozzle 242b for spraying any one of high pressure water, flame or hot water. Can be configured.
상기 절삭구(242)는 지반을 확경 절삭하는 것으로, 도 16의 (a)에서와 같은 절삭팁(242a)으로 구성할 수 있다. 상기 절삭팁(242a)은 원하는 치수대로 지반을 절삭하도록 할 수 있으며, 이에 따라 설계된 치수의 말뚝 확대부 단면을 형성하는 것이 가능하다.The cutting tool 242 is to diameter-cut the ground, it can be configured as a cutting tip 242a as shown in Fig. 16 (a). The cutting tip 242a may be to cut the ground to the desired dimensions, it is possible to form a cross-section of the pile enlargement of the designed dimensions.
상기 절삭구(242)는 도 16의 (b)에서와 같이 워터제트 분사노즐(242b)로 구성할 수 있으며, 절삭팁(242a)과 워터제트 분사노즐(242b)을 모두 구비하도록 구성하는 것도 가능하다.The cutting tool 242 may be configured as a water jet injection nozzle 242b as shown in (b) of FIG. 16, and may be configured to include both the cutting tip 242a and the water jet injection nozzle 242b. Do.
상기 워터제트 분사노즐(242b)은 도 4의 (a) 내지 (b) 또는 도 5 등에서 볼 수 있는 공급라인(40)으로부터 고압력수, 화염 또는 열수 중 어느 하나를 공급받아 제트 분사하여 주변지반을 절삭한다. The water jet injection nozzle 242b receives jet of any one of high pressure water, flame or hot water from the supply line 40 as shown in FIGS. Cut.
도 17은 원추형관입부가 구비된 본 발명 선단 확장형 말뚝을 도시하는 도면이고, 도 18은 채움재의 가압에 의하여 탈락되는 원추형관입부를 도시하는 본 발명 선단 확장형 말뚝의 종단면도이다.Fig. 17 is a view showing the present invention front end expandable pile provided with conical penetrations, and Fig. 18 is a longitudinal cross-sectional view of the present invention the end extension type pile showing conical penetrations dropped by the filling material.
도 10의 (b) 및 도 17 등에서 볼 수 있는 바와 같이, 상기 베이스부재(21)의 중앙에는 가압체(30)가 관통되는 하부관통공(214)이 형성되고, 상기 베이스부재(21)의 하부에는 하부로 갈수록 지름이 작아지는 원추형관입부(50)가 결합될 수 있다. As shown in (b) and 17 of FIG. 10, a lower through hole 214 through which the press body 30 penetrates is formed at the center of the base member 21, and the base member 21 of the base member 21 is formed. The lower portion may be coupled to the conical intrusion 50 is reduced in diameter toward the lower portion.
상기 원추형관입부(50)는 베이스부재(21) 중앙의 하부관통공(214)과 연통되도록 결합되는 것으로, 측면 및 하면이 폐쇄된 원추 형상으로 이루어져 말뚝이 지반에 쉽게 근입될 수 있도록 한다.The conical inlet 50 is coupled to communicate with the lower through-hole 214 in the center of the base member 21, the side and the bottom is made of a closed cone shape so that the pile can be easily entered into the ground.
상기 원추형관입부(50)의 구성은 도 1 또는 도 9에 도시된 확경구를 포함하는 선단 확장형 말뚝에 모두 적용 가능하다.The configuration of the conical penetration 50 is applicable to both the tip expansion type pile including the expansion sphere shown in FIG.
도 17의 (a) 내지 (c)에서 볼 수 있는 바와 같이, 상기 원추형관입부(50)의 하단에는 주입공(51)이 관통 형성되고, 상기 주입공(51)에는 주입공(51)을 선택적으로 폐쇄하는 마개(52)가 구비되되, 상기 주입공(51)은 하부에 단턱부(511)가 형성되고, 상기 마개(52)는 상기 주입공(51)에 삽입되는 가이드봉(521) 및 상기 가이드봉(521) 하단에 형성되는 것으로 지름이 확대되어 상기 단턱부(511)에 걸리는 걸림부(522)로 구성되는 것을 특징으로 한다.As shown in (a) to (c) of FIG. 17, an injection hole 51 is formed at a lower end of the conical penetration part 50, and an injection hole 51 is formed in the injection hole 51. A stopper 52 for selectively closing is provided, wherein the injection hole 51 has a stepped portion 511 formed at the bottom thereof, and the stopper 52 is a guide rod 521 inserted into the injection hole 51. And it is formed on the lower end of the guide rod 521 is characterized in that the diameter is configured to be composed of the engaging portion 522 to be caught on the stepped portion (511).
이에 따라 말뚝 관입 시에는 마개(52)의 걸림부(522)가 주입공(51)의 단턱부(511)에 걸려, 하부 슬라임이 확경구(20) 내로 유입되는 것을 방지한다(도 17의 (b)).Accordingly, during pile penetration, the locking portion 522 of the stopper 52 is caught by the stepped portion 511 of the injection hole 51 to prevent the lower slime from flowing into the enlarged orifice 20 (FIG. 17 ( b)).
그리고 말뚝 관입 후에는 확경구(20) 내부에서 채움재(60)를 주입하여 채움재(60)의 압력에 의해 마개(52)가 외측으로 이동하여 주입공(51)을 개방한다(도 17의 (c)). 이에 따라 주입공(51)을 통하여 채움재(60)가 외부로 유출되므로, 지반 밀도를 증가시킬 수 있다.In addition, after the pile penetration, the filling material 60 is injected from the inside of the enlarged oral cavity 20 so that the stopper 52 moves to the outside by the pressure of the filling material 60 to open the injection hole 51 (FIG. 17C). )). Accordingly, since the filler 60 flows out through the injection hole 51, the ground density can be increased.
상기 원추형관입부(50)는 베이스부재(21)와 고정 결합할 수 있으나, 도 18에서와 같이 확경구(20) 내부에서의 가압에 의해 베이스부재(21)와 분리되도록 베이스부재(21)와 결합할 수 있다.The conical penetration portion 50 may be fixedly coupled to the base member 21, but the base member 21 and the base member 21 to be separated from the base member 21 by the pressure in the enlarged diameter (20) as shown in FIG. Can be combined.
상기 확경구(20) 내부에서 원추형관입부(50)를 채움재(60)로 가압하거나 가압체(30)로 가압하는 등의 경우, 원추형관입부(50)가 베이스부재(21)로부터 분리된다.In the case of pressurizing the conical penetrating portion 50 with the filling material 60 or pressurizing member 30 in the enlarged diameter sphere 20, the conical penetrating portion 50 is separated from the base member 21.
그러면 분리된 틈으로 채움재(60)가 말뚝 하부 지반까지 유입되므로, 말뚝 하부 지반의 밀도가 증가하여 단단한 구근을 형성할 수 있다.Then, since the filler 60 is introduced into the separated lower ground into the separated gap, the density of the lower pile is increased to form a hard bulb.
도 19는 원추형관입부의 다른 실시예를 도시하는 도면이다.19 is a view showing another embodiment of the conical intrusion.
도 19의 (a) 내지 (b)에서 볼 수 있는 바와 같이, 상기 원추형관입부(50) 상단에는 베이스부재(21)의 하부관통공(214)에 끼움 결합되는 것으로 상기 가이드관(22)의 진출입공(221)에 대응되는 위치에 절개부(531)가 형성된 끼움부(53)가 형성되고, 상기 끼움부(53) 하단 외측에는 베이스부재(21) 하면에 걸리는 스토퍼부(54)가 형성될 수 있다.As can be seen in Figure 19 (a) to (b), the top of the conical penetration portion 50 is fitted into the lower through hole 214 of the base member 21 of the guide tube 22 A fitting portion 53 having a cutout portion 531 is formed at a position corresponding to the entrance hole 221, and a stopper portion 54 formed on a lower surface of the base member 21 is formed at an outer side of the lower portion of the fitting portion 53. Can be.
상기 끼움부(53)가 없는 경우, 채움재(60)의 압력이 일정하지 않으면 원추형관입부(50)가 일측만 분리되어 채움재(60)의 주입이 불균등하게 이루어질 수 있다.When the fitting portion 53 is not present, if the pressure of the filling material 60 is not constant, the conical penetration part 50 may be separated from only one side, and the filling material 60 may be unevenly injected.
상기 끼움부(53)는 원추형관입부(50)를 확경구(20)와 결합시키는 역할을 함과 동시에 원추형관입부(50)가 안정적으로 하향 분리되도록 가이드 역할을 한다.The fitting portion 53 serves to guide the conical penetration portion 50 and the conical penetration portion 50 to be stably separated while at the same time serves to couple the expansion hole (20).
상기 절개부(531)는 확장체(24)의 가압부(243)가 이동되는 통로로, 절개부(531)는 원추형관입부(50)가 완전히 확경구(20)로부터 분리되기 전에 내부의 채움재(60)가 조기에 하부 지반으로 주입되도록 한다.The cutout 531 is a passage through which the pressurized portion 243 of the expander 24 is moved, and the cutout 531 is a filling material therein before the conical penetration 50 is completely separated from the enlarged oral cavity 20. Allow (60) to be injected early into the lower ground.
상기 스토퍼부(54)는 관입시 원추형관입부(50)가 확경구(20) 내로 밀려들어가는 것을 방지한다.The stopper portion 54 prevents the conical penetration portion 50 from being pushed into the enlarged orifice 20 during penetration.
한편, 도 1, 도 11, 도 17 등에서 볼 수 있는 바와 같이, 상기 확경구(20)의 확경 전 외경은 말뚝 본체(10)의 외경보다 크도록 구성할 수 있다.On the other hand, as can be seen in Figures 1, 11, 17, etc., the outer diameter before the diameter of the enlarged diameter sphere 20 can be configured to be larger than the outer diameter of the pile body (10).
항타말뚝의 시공 방법은 처음부터 항타로 말뚝을 시공하는 방법과 상부 매립층이나 전석층 등을 통과하여 중간층까지 천공하고 말뚝을 중간층까지 근입한 후 항타에 의해 말뚝을 지지층까지 관입하는 방법이 있다.There are two methods for the construction of the driving pile: a method of constructing the pile with the driving force from the beginning, and a method of drilling the pile through the upper buried layer or the gypsum layer, penetrating the pile to the middle layer, and injecting the pile to the support layer by driving the pile.
일반적으로 항타말뚝에서 말뚝 본체(10)를 회전시켜 확경구(20)를 회전시키는 경우, 말뚝 본체(10)와 주변지반 사이에 공간이 없어 말뚝 깊이가 길어질수록 말뚝 본체(10)를 회전시키는 것이 어렵다. In general, when rotating the expansion sphere 20 by rotating the pile main body 10 in the driving pile, there is no space between the pile main body 10 and the surrounding ground to increase the pile depth 10 as the pile depth increases It is difficult.
이 경우 확경구(20)의 외경을 말뚝 본체(10)의 외경보다 크게 하면 말뚝 본체(10) 외주면과 주변지반 사이에 공간이 형성되므로, 말뚝 본체(10)의 회전에 의한 확경 작업이 용이하다.In this case, when the outer diameter of the enlarged diameter sphere 20 is larger than the outer diameter of the pile main body 10, a space is formed between the outer circumferential surface of the pile main body 10 and the surrounding ground, so that the enlarged diameter work by the rotation of the pile main body 10 is easy. .
다음으로, 본 발명의 선단 확장형 말뚝의 시공 방법에 대하여 살펴본다.Next, look at the construction method of the tip expansion type pile of the present invention.
본 발명의 선단 확장형 말뚝은 말뚝 본체(10)를 기성말뚝으로 형성할 수도 있고, 현장타설말뚝으로 형성할 수도 있다.The tip-extended stake of the present invention may form the pile body 10 as a ready-made pile, or may be formed as a cast-in-place pile.
말뚝 본체(10)가 기성말뚝인 경우, 본 발명의 선단 확장형 말뚝의 시공 방법은 먼저 (a) 지반에 천공홀을 형성하고, (b) 말뚝 본체(10) 저면에 확경구(20)가 결합된 선단 확장형 말뚝을 천공홀 내부에 삽입하는 순서로 진행된다.When the pile main body 10 is a ready-made pile, the construction method of the tip-extended pile of the present invention first (a) to form a drill hole in the ground, (b) the expansion diameter 20 is coupled to the bottom of the pile main body 10 The extended tip pile is inserted into the drilled hole.
이때, 천공홀은 보링 또는 타격 등 다양한 방법에 의해 형성 가능하다.In this case, the drilling hole may be formed by various methods such as boring or hitting.
이후, (c) 확경구(20)를 회전시키면서 가이드관(22) 내에 가압체(30)를 삽입하여 가압부(243)의 단부를 가압하여 확장체(24)가 지반을 절삭하면서 확경구(20) 외부로 확장되도록 한다.Subsequently, (c) while inserting the press body 30 into the guide tube 22 while rotating the enlarged diameter hole 20 to press the end portion of the pressurized portion 243, the expander 24 cuts the ground, 20) to extend outside.
상기 확경구(20)의 확장 후에는 가압체(30)를 회수하고 말뚝 내 빈 공간에 채움재를 충전하는 과정을 거쳐 시공을 마무리한다.After expansion of the enlarged oral cavity 20, the pressing body 30 is recovered and the construction is completed by a process of filling the filling material in the empty space in the pile.
상기 선단 확장형 말뚝의 시공 방법은 도 1 또는 도 9에 도시된 확경구를 포함하는 선단 확장형 말뚝에 모두 적용 가능하다.The construction method of the tip expansion-type pile can be applied to both the tip expansion-type pile including the expansion sphere shown in FIG.
아울러 말뚝 본체(10)가 현장타설말뚝인 경우, 본 발명의 선단 확장형 말뚝의 시공 방법에서는 먼저 (a) 지반에 천공홀을 형성하고, (b) 확경구(20)를 천공홀 하부에 삽입 설치하는 단계가 진행된다.In addition, when the pile body 10 is a cast-in-place pile, in the construction method of the tip expansion type pile of the present invention (a) first to form a hole in the ground, and (b) the expansion hole 20 is inserted into the lower hole installation The step is performed.
그리고 (c) 확경구(20)를 회전시키면서 가이드관(22) 내에 가압체(30)를 삽입하여 가압부(243)의 단부를 가압하여 확장체(24)가 지반을 절삭하면서 확경구(20) 외부로 확장되도록 한다.And (c) inserting the press body 30 into the guide tube 22 while rotating the enlarged diameter hole 20 to press the end portion of the pressurizing portion 243 so that the expander 24 cuts the ground and the enlarged diameter mouth 20 ) To expand outward.
마지막으로 (d) 상기 확경구(20) 상부에 콘크리트를 타설하여 현장타설말뚝을 형성한다. Finally (d) the concrete is placed in the upper diameter sphere 20 to form a cast-in-place pile.
상기 (d) 단계에서는 콘크리트 타설 전에 철근망, FRP 등의 보강재를 설치하는 것도 가능하다.In the step (d) it is also possible to install reinforcing materials, such as reinforcing steel bars, FRP before concrete placement.
상기 선단 확장형 말뚝의 시공 방법은 도 9에 도시된 확경구를 포함하는 선단 확장형 말뚝에 적용 가능하다.The construction method of the tip expansion-type pile is applicable to the tip expansion-type pile including the expansion sphere shown in FIG.
또한, 본 발명의 선단 확장형 말뚝의 시공 방법은 (a) 말뚝 본체(10) 저면에 확경구(20)가 결합된 선단 확장형 말뚝을 타입, 압입 또는 회전관입 중 어느 하나에 의해 지중에 삽입하는 단계; 및 (b) 확경구(20)를 회전시키면서 가이드관(22) 내에 가압체(30)를 삽입하여 가압부(243)의 단부를 가압하여 확장체(24)가 지반을 절삭하면서 확경구(20) 외부로 확장되도록 하는 단계; 를 포함하도록 구성할 수도 있다.In addition, the construction method of the tip expansion type pile of the present invention (a) step of inserting the tip expansion type coupled to the expansion sphere 20 on the bottom of the pile body 10 by any one of the type, press-fit or rotary penetration ; And (b) inserting the press body 30 into the guide tube 22 while rotating the enlarged sphere 20 to press the end portion of the press unit 243 so that the expander 24 cuts the ground and the enlarged sphere 20 ) Extending outwardly; It may be configured to include.
상기 선단 확장형 말뚝의 시공 방법은 도 1 또는 도 9에 도시된 확경구를 포함하는 선단 확장형 말뚝에 모두 적용 가능하다.The construction method of the tip expansion-type pile can be applied to both the tip expansion-type pile including the expansion sphere shown in FIG.
본 발명은 별도의 확공드릴 없이 말뚝 본체 하부에 결합되는 확경구의 지름을 확대시켜 토사층에서 단단한 암반층까지 다양한 지층에서 신속하게 말뚝 선단 지반을 확경 절삭함과 동시에 말뚝 확대부를 형성할 수 있으며, 이에 따라 말뚝의 본당 허용지지력이 크게 증가되므로 말뚝 수량의 최소화 및 굴착 심도의 최적화가 가능하다. 따라서 뛰어난 경제성으로 각종 건축·토목 구조물의 기초용 말뚝에 광범위하게 적용할 수 있다는 점에서 산업상 이용가능성이 있다.The present invention can expand the diameter of the diameter of the expansion sphere coupled to the lower pile body without additional drill drill to form a pile expansion at the same time to rapidly cut the pile tip ground in a variety of strata from soil layer to solid rock layer, accordingly As the allowable bearing capacity of piles is greatly increased, it is possible to minimize the number of piles and to optimize the depth of excavation. Therefore, there is industrial applicability in that it can be widely applied to foundation piles of various construction and civil structures with excellent economic efficiency.
Claims (27)
- 말뚝 본체(10), 말뚝 본체(10) 하부에 결합되어 말뚝 본체(10)의 회전과 함께 회전되면서 가압체(30)에 의해 지름이 확장되는 확경구(20)로 구성되는 선단 확장형 말뚝에 관한 것으로,Regarding the tip main body 10, the tip expansion-type pile coupled to the lower portion of the pile main body 10 is composed of an enlarged diameter hole 20 is expanded by the pressure body 30 while being rotated with the rotation of the pile main body 10 In that,상기 확경구(20)는, 베이스부재(21); 상기 베이스부재(21) 중앙 상면에 일체로 돌출 형성되는 것으로 상부에서 가압체(30)가 진입할 수 있도록 상부가 개방되고 외주면에 복수의 진출입공(221)이 형성된 가이드관(22); 상기 가이드관(22)을 말뚝 본체(10) 내부에 고정 결합하는 결합부재(23); 및The enlarged sphere 20, the base member 21; A guide tube 22 which is formed to protrude integrally with the center upper surface of the base member 21 so that the upper part is opened so that the press body 30 can enter from the upper part and a plurality of entrance holes 221 are formed on the outer circumferential surface thereof; A coupling member 23 fixedly coupling the guide tube 22 to the pile body 10; And상기 베이스부재(21)와 말뚝 본체(10) 하부 사이에 구비되는 것으로 외측에 절삭구(242)가 형성된 날개부(241) 및 상기 날개부(241) 후단에 구비되어 일단이 상기 가이드관(22)의 진출입공(221)을 관통하여 가이드관(22) 내에 위치하는 것으로 가압체(30)의 가압에 의해 가이드관(22) 외부로 슬라이딩 이동함으로써 날개부(241)를 외부로 확장하는 가압부(243)로 구성되는 확장체(24); 로 구성되는 것을 특징으로 하는 선단 확장형 말뚝.It is provided between the base member 21 and the lower portion of the pile main body 10 and is provided at the rear end of the wing portion 241 and the wing portion 241 formed with a cutting tool 242 on the outside of the guide tube 22. Pressing part which penetrates the entrance hole 221 of the inside) and is located in the guide pipe 22, and expands the wing part 241 to the outside by slidingly moving out of the guide pipe 22 by the pressurizing of the press body 30. An expander 24 composed of 243; Extended tip pile, characterized in that consisting of.
- 제1항에서,In claim 1,상기 결합부재(23)는 말뚝 본체(10) 내면과 가이드관(22) 외면을 연결하는 복수의 격벽부재인 것을 특징으로 하는 선단 확장형 말뚝.The coupling member 23 is a front end expansion type pile, characterized in that a plurality of partition member connecting the inner surface of the pile body 10 and the guide tube 22.
- 제2항에서,In claim 2,상기 말뚝 본체(10)는 확경구(20)가 결합되는 하부부재(11)와 상기 하부부재(11) 상부에 결합되는 상부부재(12)로 분할되는 것을 특징으로 하는 선단 확장형 말뚝.The pile body 10 is a front end expandable pile, characterized in that divided into a lower member (11) to which the expansion sphere 20 is coupled and the upper member (12) coupled to the upper portion of the lower member (11).
- 제3항에서,In claim 3,상기 하부부재(11)의 상단 내측에는 단턱부(111)가 형성되어 상기 상부부재(12)의 하단이 단턱부(111)에 안착되도록 결합되는 것을 특징으로 하는 선단 확장형 말뚝.The stepped portion 111 is formed inside the upper end of the lower member 11 so that the lower end of the upper member 12 is coupled to be seated on the stepped portion 111.
- 제4항에서,In claim 4,상기 상부부재(12)의 하부 외주면에는 나사산(121)이 형성되고, 상기 하부부재(11)의 단턱부(111) 측면 내주면에는 암나사산(112)이 형성되어 상부부재(12)와 하부부재(11)가 나사 결합되는 것을 특징으로 하는 선단 확장형 말뚝.A thread 121 is formed on a lower outer circumferential surface of the upper member 12, and a female thread 112 is formed on an inner circumferential surface of the side surface of the stepped portion 111 of the lower member 11 so that the upper member 12 and the lower member ( 11) Extended tip pile, characterized in that the screwed.
- 제1항에서,In claim 1,상기 결합부재(23)는 가이드관(22) 외주면에 돌출 형성된 것으로 외주면에 나사산(231)이 형성되어, 말뚝 본체(10) 내주면에 형성된 암나사산에 나사 결합되는 것을 특징으로 하는 선단 확장형 말뚝.The coupling member 23 is formed to protrude on the outer circumferential surface of the guide tube 22, the thread 231 is formed on the outer circumferential surface, characterized in that the screw screw is coupled to the female thread formed on the inner circumferential surface of the pile body (10).
- 제1항에서,In claim 1,상기 결합부재(23)는 가이드관(22) 외주면에 돌출 형성된 것으로 말뚝 본체(10) 내주면에 접하고, 말뚝 본체(10) 외부에서 체결부재에 의해 말뚝 본체(10)와 결합되는 것을 특징으로 하는 선단 확장형 말뚝.The coupling member 23 is formed on the outer circumferential surface of the guide tube 22 and is in contact with the inner circumferential surface of the pile body 10, and is coupled to the pile body 10 by a fastening member from the outside of the pile body 10. Expandable pile.
- 제2항 내지 제5항 중 어느 한 항에서,The method according to any one of claims 2 to 5,상기 격벽부재는 각 확장체(24)의 위치에 구비되되, 상기 격벽부재의 하단은 말뚝 본체(10) 하부로 일정 길이 돌출되고, 상기 확장체(24)의 상면에는 상기 격벽부재의 하단이 삽입되는 홈부인 확장안내부(244)가 확장체(24)의 확장 방향으로 형성되는 것을 특징으로 하는 선단 확장형 말뚝.The partition member is provided at the position of each expansion body 24, the lower end of the partition member protrudes a predetermined length to the lower portion of the pile body 10, the lower end of the partition member is inserted into the upper surface of the expansion body 24 An expansion guide part 244, which is a groove part, is formed in the direction of expansion of the expansion body 24.
- 제1항 내지 제7항 중 어느 한 항에서,The method according to any one of claims 1 to 7,상기 말뚝 본체(10)의 하단에는 확장체(24)의 확장 방향으로 돌부 또는 홈부인 복수의 가이드레일부(13, 14)가 형성되고, 상기 확장체(24)의 상면에는 상기 가이드레일부(13, 14)에 대응되어 맞물리는 홈부 또는 돌부인 확장안내부(244, 245)가 형성되는 것을 특징으로 하는 선단 확장형 말뚝.A plurality of guide rails 13 and 14, which are protrusions or grooves, are formed in the lower end of the pile body 10 in the extending direction of the expansion body 24, and the guide rail portion is formed on an upper surface of the expansion body 24. 13, 14 is a front end expansion type pile, characterized in that the expansion guide portion (244, 245) that is a groove or protrusion to be engaged.
- 말뚝 본체(10), 말뚝 본체(10) 하부에 결합되어 말뚝 본체(10)의 회전과 함께 회전되면서 가압체(30)에 의해 지름이 확장되는 확경구(20)로 구성되는 선단 확장형 말뚝에 관한 것으로,Regarding the tip main body 10, the tip expansion-type pile coupled to the lower portion of the pile main body 10 is composed of an enlarged diameter hole 20 is expanded by the pressure body 30 while being rotated with the rotation of the pile main body 10 In that,상기 확경구(20)는, 베이스부재(21); 상기 베이스부재(21) 중앙 상면에 일체로 돌출 형성되는 것으로 상부에서 가압체(30)가 진입할 수 있도록 상부가 개방되고 외주면에 복수의 진출입공(221)이 형성된 가이드관(22); 상기 가이드관(22) 상부에 결합되는 것으로 중앙에 상부관통공(251)이 형성된 상부가이드부재(25); 및The enlarged sphere 20, the base member 21; A guide tube 22 which is formed to protrude integrally with the center upper surface of the base member 21 so that the upper part is opened so that the press body 30 can enter from the upper part and a plurality of entrance holes 221 are formed on the outer circumferential surface thereof; An upper guide member 25 having an upper through hole 251 formed at the center thereof to be coupled to the upper portion of the guide tube 22; And상기 베이스부재(21)와 상부가이드부재(25) 사이에 구비되는 것으로 외측에 절삭구(242)가 형성된 날개부(241) 및 상기 날개부(241) 후단에 구비되는 것으로 일단이 상기 가이드관(22)의 진출입공(221)을 관통하여 가이드관(22) 내에 위치하여 가압체(30)의 가압에 의해 가이드관(22) 외부로 슬라이딩 이동함으로써 날개부(241)를 외부로 확장하는 가압부(243)로 구성되는 확장체(24); 로 구성되는 것을 특징으로 하는 선단 확장형 말뚝.It is provided between the base member 21 and the upper guide member 25 and is provided at the rear end of the wing portion 241 and the wing portion 241 is formed with a cutting tool 242 on the outside of the guide tube ( The pressurizing part which penetrates the entrance / exit hole 221 of 22 and is located in the guide pipe 22, and expands the wing part 241 to the outside by slidingly moving out of the guide pipe 22 by the pressurization of the press body 30. An expander 24 composed of 243; Extended tip pile, characterized in that consisting of.
- 제10항에서,In claim 10,상기 상부가이드부재(25)에는 말뚝 본체(10) 내에 정착되어 말뚝 본체(10)와 결합되는 보강부재(26)가 결합되는 것을 특징으로 하는 선단 확장형 말뚝.The upper guide member 25 is fixed to the pile main body 10 is a front end expansion type piling characterized in that the reinforcing member 26 is coupled to the pile main body 10 is coupled.
- 제11항에서,In claim 11,상기 상부가이드부재(25)의 상부관통공(251) 주위에는 상기 보강부재(26)의 단부가 삽입되어 결합되는 복수의 결합공(252)이 형성되는 것을 특징으로 하는 선단 확장형 말뚝.Tip expansion type pile, characterized in that a plurality of coupling holes 252, the end of the reinforcing member 26 is inserted and coupled around the upper through hole 251 of the upper guide member 25 is formed.
- 제10항에서,In claim 10,상기 상부가이드부재(25)와 베이스부재(21) 사이 간격은 바깥쪽으로 갈수록 커지는 것을 특징으로 하는 선단 확장형 말뚝.Tip expansion type pile, characterized in that the gap between the upper guide member 25 and the base member 21 increases toward the outside.
- 제1항 또는 제10항에서,The method of claim 1 or 10,상기 베이스부재(21)는 하면이 외측으로 상향 경사진 경사면(211)이 형성되는 것을 특징으로 하는 선단 확장형 말뚝.The base member 21 is a front end-type stake, characterized in that the inclined surface 211 is inclined upwardly outward.
- 제10항에서,In claim 10,상기 상부가이드부재(25) 하면 또는 베이스부재(21)의 상면 중 적어도 어느 하나 이상에는 확장체(24)의 확장 방향으로 돌부 또는 홈부인 가이드레일부(212)가 형성되고, 상기 확장체(24)의 상기 가이드레일부(212)에 대응되는 부위에는 상기 가이드레일부(212)에 맞물리는 홈부 또는 돌부인 확장안내부(246)가 형성되는 것을 특징으로 하는 선단 확장형 말뚝.At least one of the lower surface of the upper guide member 25 or the upper surface of the base member 21 is formed with a guide rail portion 212 that is a protrusion or groove in the expansion direction of the expansion body 24, the expansion body 24 At the portion corresponding to the guide rail portion 212 of the front end expansion type, characterized in that the expansion guide portion 246 that is a groove or protrusion engaging the guide rail portion 212 is formed.
- 제1항 또는 제10항에서,The method of claim 1 or 10,상기 확장체(24)의 날개부(241)는 외측으로 갈수록 두께가 얇아지도록 하면이 경사진 것을 특징으로 하는 선단 확장형 말뚝.The wing portion 241 of the expansion body 24 is a front end-type stake, characterized in that the lower surface is inclined so as to become thinner toward the outside.
- 제1항 또는 제10항에서,The method of claim 1 or 10,상기 베이스부재(21)는 확장체(24)의 하부를 지지하도록 각 확장체(24)의 하부에 베이스부재(21)의 외측으로 돌출되는 복수의 지지날개(213)가 형성되는 것을 특징으로 하는 선단 확장형 말뚝.The base member 21 of the base member 21 in the lower portion of each expansion body 24 to support the lower portion of the expansion body 24 Tip expansion type piling characterized in that a plurality of support wings 213 protruding outward is formed.
- 제17항에서,The method of claim 17,상기 확장체(24)의 날개부(241)는 확장 방향인 외측으로 갈수록 두께가 두꺼워지는 것을 특징으로 하는 선단 확장형 말뚝.The wing portion 241 of the expansion body 24 is a tip expansion type pile, characterized in that the thickness becomes thicker toward the outside in the expansion direction.
- 제1항 또는 제10항에서,The method of claim 1 or 10,상기 절삭구(242)는 절삭팁(242a)이거나 고압력수, 화염 또는 열수 중 어느 하나를 분사하는 워터제트 분사노즐(242b)인 것을 특징으로 하는 선단 확장형 말뚝.The cutting tool 242 is a cutting tip (242a) or extended jet type nozzle characterized in that the water jet injection nozzle (242b) for spraying any one of high pressure water, flame or hot water.
- 제1항 또는 제10항에서,The method of claim 1 or 10,상기 베이스부재(21)의 중앙에는 가압체(30)가 관통되는 하부관통공(214)이 형성되고, 상기 베이스부재(21)의 하부에는 하부로 갈수록 지름이 작아지는 원추형관입부(50)가 결합되는 것을 특징으로 하는 선단 확장형 말뚝.In the center of the base member 21 is formed a lower through hole 214 through which the press body 30 penetrates, and the lower portion of the base member 21 has a conical penetration 50 having a smaller diameter toward the lower portion. Tip expandable pile, characterized in that coupled.
- 제20항에서,The method of claim 20,상기 원추형관입부(50)의 하단에는 주입공(51)이 관통 형성되고, 상기 주입공(51)에는 주입공(51)을 선택적으로 폐쇄하는 마개(52)가 구비되되, 상기 주입공(51)은 하부에 단턱부(511)가 형성되고, 상기 마개(52)는 상기 주입공(51)에 삽입되는 가이드봉(521) 및 상기 가이드봉(521) 하단에 형성되는 것으로 지름이 확대되어 상기 단턱부(511)에 걸리는 걸림부(522)로 구성되는 것을 특징으로 하는 선단 확장형 말뚝.An injection hole 51 is formed through the lower end of the conical penetration part 50, and the injection hole 51 is provided with a stopper 52 for selectively closing the injection hole 51. ) Is formed in the lower step portion 511, the stopper 52 is formed in the guide rod 521 and the guide rod 521 is inserted into the injection hole 51 and the lower end diameter is expanded Tip expansion type pile, characterized in that consisting of the engaging portion 522 is caught on the stepped portion (511).
- 제20항에서,The method of claim 20,상기 원추형관입부(50)는 확경구(20) 내부에서의 가압에 의해 베이스부재(21)와 분리되도록 베이스부재(21)와 결합되는 것을 특징으로 하는 선단 확장형 말뚝.The conical inlet 50 is the tip expansion type, characterized in that coupled to the base member 21 to be separated from the base member 21 by the pressure in the expansion sphere (20).
- 제22항에서,The method of claim 22,상기 원추형관입부(50) 상단에는 베이스부재(21)의 하부관통공(214)에 끼움 결합되는 것으로 상기 가이드관(22)의 진출입공(221)에 대응되는 위치에 절개부(531)가 형성된 끼움부(53)가 형성되고, 상기 끼움부(53) 하단 외측에는 베이스부재(21) 하면에 걸리는 스토퍼부(54)가 형성되는 것을 특징으로 하는 선단 확장형 말뚝.The incision 531 is formed at a position corresponding to the entrance hole 221 of the guide tube 22 to be fitted into the lower through hole 214 of the base member 21 at the upper end of the conical penetration part 50. Tip portion 53 is formed, the front end expansion type pile, characterized in that the stopper portion 54 is formed on the lower side of the base portion (21) is formed on the lower side of the fitting portion (53).
- 제1항 또는 제10항에서,The method of claim 1 or 10,상기 확경구(20)의 확경 전 외경은 말뚝 본체(10)의 외경보다 큰 것을 특징으로 하는 선단 확장형 말뚝.Expanded diameter outer diameter of the expansion sphere 20 is the tip expansion type pile, characterized in that larger than the outer diameter of the pile body (10).
- 제1항 또는 제10항에 의한 선단 확장형 말뚝을 시공하는 방법에 관한 것으로,It relates to a method of constructing the tip expansion type pile according to claim 1,(a) 지반에 천공홀을 형성하는 단계;(a) forming a hole in the ground;(b) 말뚝 본체(10) 저면에 확경구(20)가 결합된 선단 확장형 말뚝을 천공홀 내부에 삽입하는 단계; 및(b) inserting the tip-extended pile having the expansion diameter 20 coupled to the bottom of the pile body 10 into the drilling hole; And(c) 확경구(20)를 회전시키면서 가이드관(22) 내에 가압체(30)를 삽입하여 가압부(243)의 단부를 가압하여 확장체(24)가 지반을 절삭하면서 확경구(20) 외부로 확장되도록 하는 단계; 를 포함하여 구성되는 것을 특징으로 하는 선단 확장형 말뚝의 시공 방법.(c) The diameter sphere 20 is inserted while the expansion body 24 cuts the ground by inserting the pressing body 30 into the guide tube 22 while rotating the enlarged diameter mouth 20 to press the end portion of the pressing portion 243. Allowing it to expand outwardly; Construction method of the distal end-type pile, characterized in that comprising a.
- 제10항에 의한 선단 확장형 말뚝을 시공하는 방법에 관한 것으로,Regarding the method of constructing the tip expansion type pile according to claim 10,(a) 지반에 천공홀을 형성하는 단계;(a) forming a hole in the ground;(b) 확경구(20)를 천공홀 하부에 삽입 설치하는 단계;(b) inserting and installing the enlarged diameter hole 20 under the drilled hole;(c) 확경구(20)를 회전시키면서 가이드관(22) 내에 가압체(30)를 삽입하여 가압부(243)의 단부를 가압하여 확장체(24)가 지반을 절삭하면서 확경구(20) 외부로 확장되도록 하는 단계; 및(c) The diameter sphere 20 is inserted while the expansion body 24 cuts the ground by inserting the pressing body 30 into the guide tube 22 while rotating the enlarged diameter mouth 20 to press the end portion of the pressing portion 243. Allowing it to expand outwardly; And(d) 상기 확경구(20) 상부에 콘크리트를 타설하여 현장타설말뚝을 형성하는 단계; 를 포함하여 구성되는 것을 특징으로 하는 선단 확장형 말뚝의 시공 방법.(d) placing concrete on top of the enlarged sphere 20 to form a cast-in-place pile; Construction method of the distal end-type pile, characterized in that comprising a.
- 제1항 또는 제10항에 의한 선단 확장형 말뚝을 시공하는 방법에 관한 것으로,It relates to a method of constructing the tip expansion type pile according to claim 1,(a) 말뚝 본체(10) 저면에 확경구(20)가 결합된 선단 확장형 말뚝을 타입, 압입 또는 회전관입 중 어느 하나에 의해 지중에 삽입하는 단계; 및(a) inserting the tip-extended pile, in which the enlarged orifice 20 is coupled to the bottom of the pile body 10, into the ground by any one of type, press-fit or rotary penetration; And(b) 확경구(20)를 회전시키면서 가이드관(22) 내에 가압체(30)를 삽입하여 가압부(243)의 단부를 가압하여 확장체(24)가 지반을 절삭하면서 확경구(20) 외부로 확장되도록 하는 단계; 를 포함하여 구성되는 것을 특징으로 하는 선단 확장형 말뚝의 시공 방법.(b) Inserting the press body 30 into the guide tube 22 while rotating the enlarged diameter hole 20 to press the end portion of the pressurizing portion 243 so that the expander 24 cuts the ground and the enlarged diameter hole 20 Allowing it to expand outwardly; Construction method of the distal end-type pile, characterized in that comprising a.
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KR1020140057529A KR20150065129A (en) | 2013-12-03 | 2014-05-14 | Self-extending piles and construction method thereof |
KR10-2014-0057529 | 2014-05-14 | ||
KR20140144764 | 2014-10-24 | ||
KR10-2014-0144764 | 2014-10-24 | ||
KR10-2015-0066858 | 2015-05-13 | ||
KR1020150066858A KR20150131995A (en) | 2014-05-14 | 2015-05-13 | Piles with an extended head and construction method thereof |
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KR20050110099A (en) * | 2004-05-17 | 2005-11-22 | 이엑스티 유한회사 | Variable extension member of pile with an extended head |
KR20100121109A (en) * | 2009-05-08 | 2010-11-17 | 주식회사 백산공영 | Pile with head of extending wedge type |
KR101027963B1 (en) * | 2010-12-29 | 2011-04-13 | (주)삼일이엔씨 | Construction method for concreting enlarged drill hole for piles and tention members |
KR20130002731A (en) * | 2011-06-29 | 2013-01-08 | 이대동 | Extended pile |
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