WO2015058555A1 - 复式挤扩桩成桩工法及复式挤扩成桩设备 - Google Patents
复式挤扩桩成桩工法及复式挤扩成桩设备 Download PDFInfo
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- WO2015058555A1 WO2015058555A1 PCT/CN2014/081476 CN2014081476W WO2015058555A1 WO 2015058555 A1 WO2015058555 A1 WO 2015058555A1 CN 2014081476 W CN2014081476 W CN 2014081476W WO 2015058555 A1 WO2015058555 A1 WO 2015058555A1
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- pile
- expansion
- enlarged
- extrusion
- drill
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 150000001875 compounds Chemical class 0.000 title claims abstract description 48
- 238000001125 extrusion Methods 0.000 claims abstract description 100
- 238000005553 drilling Methods 0.000 claims abstract description 81
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims description 33
- 239000002689 soil Substances 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 19
- 230000007704 transition Effects 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 4
- 230000006872 improvement Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 241001272720 Medialuna californiensis Species 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 238000013461 design Methods 0.000 description 12
- 230000008901 benefit Effects 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 241000237858 Gastropoda Species 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000009916 joint effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0038—Production methods using an auger, i.e. continuous flight type
-
- 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
-
- 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
- E02D5/56—Screw piles
Definitions
- the invention belongs to the field of civil engineering, and relates to a double-extrusion pile-forming method and a double-extrusion pile-forming device. Background technique
- the piles can be divided into three categories: non-squeezed soil piles, partially soil compacted piles and soil compacted piles.
- the pile shape of the pile can be equal or cross-section, and the shape of the pile and the pile-forming method directly determine the bearing capacity, construction speed, project cost and environmental protection of the pile.
- the generation of the variable section pile greatly improves the side friction resistance of the pile, thereby shortening the pile length, reducing the pile diameter and the number of piles, and the construction cost is greatly
- the geotechnical engineering community has been committed to the development of new piles that are environmentally friendly, highly load-bearing and economical due to the problems of technical, cost and environmental aspects of low-carrying capacity, mud pollution, etc.
- Type and construction method especially for reasonable squeezing type piles that can be piled into piles at one time, because the construction method of the squeezing piles has obvious technical and cost advantages compared with non-squeezing piles. It has the advantages of construction speed, no mud pollution, no vibration, low noise and other construction benefits and environmental protection.
- the trigeminal extrusion and support piles (such as CN201109909Y, CN102021905A) are variable-section cast-in-place piles with pile bodies and knuckles or discs. Compared with the equal-section earth-moving piles, the side resistance and end resistance are greatly improved.
- the pile-forming method is relatively complicated, drilling-extrusion-clearing-clearing-aperture inspection--reinforcing cage-casting concrete, pile-forming process is complicated, increasing the time and cost of single-pile construction, in case of higher groundwater level In the soil layer, the construction is prone to collapse phenomenon, and the soil transportation is easy to cause environmental pollution.
- the subsequent corresponding patents are changes to the extrusion device, which improves the efficiency of the extrusion method, but the method of pile formation is still After the holes are formed into piles.
- the integrated long-spiral squeezed branch pile drill with the publication number CN201334661Y and the integrated long-spiral squeezed branch pile drill similar to the above have new improvements to the pile-forming method of the pile pile, the drill After drilling to the design depth, the pile is formed by extrusion and expansion. When the drilling tool is lifted off the ground, the pile construction is completed. Although the pile forming method becomes simple and fast, the construction process still needs to take the soil, and the soil transportation has the influence on the environmental pollution, and There is a virtual soil at the pile end, and the settlement becomes Large.
- the extrusion arm is at the most unfavorable working angle, and the maximum bending moment is easy to break the root, and when it encounters hard soil, it only relies on the hydraulic cylinder, squeezes and expands. The arm is difficult to open.
- the control precision is high, mechanical failure is easy, the equipment cost is high, and the maintenance cost is large.
- Variable-section threaded piles (such as CN2716480Y, CN102162248A) are squeezing piles, which are full-thread piles.
- the two-way spiral squeezed pile (such as CN101012649A, CN20218431U) is a cylindrical pile with equal section, which belongs to the whole soil compaction pile.
- the advantage of this pile is that the drilling tool is compacted to make the pile side resistance significantly improved, and the disadvantage is that it is hard soil layer.
- the two-way helically squeezed drill bit is used, it is difficult to drill, and the pile is difficult, and the pile formed by the extrusion and the drill has the same outer diameter, so the energy consumption is obvious.
- the semi-screw pile (also known as screw pile, such as CN1254587C, CN1904225A, CN101016743U) is a squeezing pile with variable cross-section.
- the pile machine reasonably compacts the soil according to the sensitivity of the soil, so there is no squeezing.
- the negative effect, the pile-forming method utilizes a simple mechanical principle, so that the direction of the rotating force is consistent with the direction of rotation, which can achieve expansion and convergence, and the bearing capacity of the pile is high.
- Many inventions of the pile and its process have been piled up in the construction field. It is widely used in foundation and foundation treatment.
- Rotary squeezed pile (such as CN101016743A) is a type of squeezing type cast-in-place pile with equal diameter or pile end with enlarged head.
- the construction is realized by synchronous and non-synchronous technology in the pile machine control system. However, it still has certain limitations.
- the formation of the enlarged end of the pile end adopts the principle of expansion bolts.
- the construction drill pipe adopts dual power output, the cost is high, and the mechanical movement during the expansion is more complicated, and it is easy to wear and consume. get over. Summary of the invention
- the object of the present invention is to overcome the above problems and defects existing in the prior art, and to provide a higher bearing capacity, smaller settlement, better pile quality, lower cost, lower energy consumption, and higher work efficiency.
- a double-extrusion pile-forming method comprises the following steps:
- the pile rig After the pile rig equipped with the double squeezing and expanding pile equipment is in place, the pile rig is started, the torque in the clockwise direction and the downward axial pressure are applied, and the drilling tool is used to drill the pile equipment.
- the extrusion hole is expanded into a hole, and the diameter of the pile hole after the extrusion is the outer diameter of the drill pipe, and the drilling tool of the double-extrusion pile-forming device is mechanically squeezed and expanded into a hole until the designed hole depth is reached.
- the pile rig is started, the counter-clockwise rotation and the drilling are carried out, the expansion of the multi-squeeze and expansion into the pile equipment is expanded, and the expansion of the body in the compound squeezing and expanding into the pile equipment is improved.
- the process is always in an expanded state; the concrete pump is started at the same time as the drilling tool of the double-squeeze-expanding pile device starts to be lifted up, and under the pressure of the concrete pump, the inner casing is separated from the outer pipe, and the inner casing is slippery.
- Maintaining the lifting speed is equal to the product of the rotating speed and the thread lead until the pile material is pressed to the top of the pile top to obtain a full-threaded double-extrusion pile.
- the lifting speed is equal to the product of the rotating speed and the end thickness of the screw, and the other steps are similar to obtain a double shallow threaded extruded pile.
- the pile rig is started to rotate counterclockwise, so that the formed hole body is further expanded and squeezed by the enlarged body of the device, forming and equipment. Expanding a part of the cylinder of equal diameter, then lifting the drill and pumping the concrete, keeping the lifting speed no more than the product of the rotating speed and the thickness of the rotating arm until the pile is pressed to the top of the pile to form a double-studded unthreaded pile. .
- the pile rig is started to rotate counterclockwise, so that the enlarged body of the double squeezing and expanding into the pile device is expanded, so that the formed hole body is The enlarged body of the device is further expanded and extruded to form a cylindrical body with a diameter such as an expanded portion of the device, and then the drill is rotated and lifted and continuously pumped concrete.
- the pile drill rig is clockwise in place.
- the expansion body is converted into a convergent state, and the rotation speed and the lifting speed are maintained until the pile material is pressed to the pile top level to form a double-extended and enlarged head pile with an enlarged head.
- the above steps of forming the enlarged head are repeated at any position of the pile hole to form a double-extrusion and enlarged head pile with a plurality of enlarged heads.
- the pile rig is started. Counterclockwise rotation expands the expansion of the compound into a pile device, and the lifting speed and the lifting speed are equal to the product of the rotation speed and the thread lead.
- the drill is started to be lifted up while the drilling tool of the double-extrusion pile-forming device starts to be lifted.
- the pile rig is rotated counterclockwise to expand the expansion of the double squeezing into the pile device, and the lifting speed is maintained at a speed equal to the rotation speed and The product of the thick end of the screw, the concrete is continuously pumped while the drilling tool of the double-extrusion pile-forming equipment starts to be lifted up; the tool to be drilled rises to the straight section, the counterclockwise torque is applied, and the body transformation is performed.
- the drill pipe is vertically changed from the ground to the drill pipe and the ground is 0 to 90°, and the other pile-forming scheme is similar to the above technical solution and the improved technical solution, and can be used as a bolt.
- the utility model relates to a compound extrusion-expanding pile device of the above-mentioned double-extrusion pile-forming method, comprising a double-extrusion drilling tool and a control system thereof, the double-extrusion drilling tool comprising a drill pipe, and a plurality of drill bit segments of the drill pipe Enlarged body
- the drill rod comprises a hollow outer sleeve and an inner sleeve disposed in the outer sleeve tube.
- the upper portion of the outer sleeve is connected with a common drill rod, and the bottom of the outer sleeve is provided with more than one boss distributed along the circumference, and the inner sleeve is provided with an inner side of the outer sleeve a sliding groove for linear sliding of the inner sleeve, a valve for pressing the pile material is arranged at the lower part of the inner sleeve, a transition plate is arranged at a position below the inner sleeve valve, and a connecting body is connected to the lower surface of the inner sleeve
- the upper surface of the connecting body has a groove matching the bottom of the outer sleeve boss, and the lower surface of the connecting body is a hexagonal prism boss, and the connecting body is connected with the quadrangular pyramid drill tip through the hexagonal prism boss. According to the design of the present invention
- the enlarged body is disposed on the thread along the Archimedes spiral, and includes an enlarged mother tooth, a rotating arm and a sliding arm, wherein the enlarged mother tooth is a segment of the complete thread, and the two ends of the enlarged mother tooth are provided with a limit device.
- the enlarged female tooth has an enlarged chute, and one end of the enlarged chute has a hinge point, one end of the rotating arm is connected to the enlarged chute, one end is hinged with the sliding arm, one end of the sliding arm is hinged with the rotating arm, and one end is assembled in the chute slide.
- the enlarged body When the drill pipe rotates clockwise, the enlarged body is initially converged; when the drill pipe rotates counterclockwise, under the joint action of the pile machine torque, the geotechnical friction, the pressure, etc., the rotating arm in the enlarged female tooth is turned toward the hinge Slide the point and turn it clockwise with the turning arm until the limit position Expansion status.
- the expanding body in the expanded state is very easy to return to the convergence state under the counterclockwise force.
- the enlarged female teeth of the enlarged body and the thread of the drill thread are arranged at a pitch, and the cross section of the enlarged female tooth is a polygonal shape with a variable cross section, and the root thickness is larger than the thickness of the tooth top.
- One end of the sliding arm of the body has a cylindrical shape and slides in the enlarged sliding groove.
- the thickness of the half moon portion of the rotating arm and the sliding arm is smaller than the thickness of the tooth tip of the enlarged female tooth and smaller than the thickness of the end cylindrical portion.
- the control system adopted by the invention is that the automatic control system completes the dual power of the pile driver _ the matching control of the pressure lifting power and the rotary power of the drill pipe.
- the drill pipe can be controlled by the automatic control system as needed to achieve:
- the double-extrusion pile of the invention is formed into a pile-forming method and a double-extrusion-splitting pile device, and has the following advantages compared with the prior art:
- the double-extrusion pile-forming method of the present invention has the unique technical features of "drilling into a small hole and lifting a large pile", and solves the following defects and problems in the conventional technology:
- the double-extrusion and pile-forming equipment of the invention is scientific in force and resistant to large torque.
- the extrusion method mentioned in the technical background of the present invention operates in the most unfavorable working conditions, and the external resistance is applied to the squeezing device in the form of a bending moment, which requires extremely high material strength.
- the external resistance is applied to the squeezing and expanding device in the form of an axial force, so that the squeezing and expanding device is in the most favorable stress condition.
- the squeezing and expanding mode of the invention is mechanical rather than hydraulic, and the process of extruding into a hole, lifting and expanding, and forming a pile is completed in one time, so that the construction is very simple and rapid.
- the double extrusion-expanding pile device of the invention has the special advantage of continuous extrusion and expansion, and solves the shortcomings of the three-forked squeezed pile and the branch pile which cannot be continuously squeezed and expanded. Even in the construction of the enlarged head, the efficiency of the extrusion is much larger than that of the three-pronged pile, the pile and the pile. It does not need pre-forming holes, and avoids many adverse effects caused by pre-forming holes, such as mud, collapsed holes, and loose soil at the pile end. Therefore, the double extrusion-expanding pile apparatus of the present invention has outstanding substantive features and significant technological advancement.
- the compound extrusion-expansion pile device of the present invention utilizes the special function of the double-extrusion drilling and drilling tool and its automatic control system to realize the matching between the power and the speed to realize a special construction method, and adjust the drilling speed and the lifting speed, which can form a plurality of piles.
- the type of double extrusion pile type It can be adapted to local conditions, avoiding the disadvantages of traditional technology pile type and limited application range.
- the control system of the double-extrusion and expansion pile equipment of the present invention adopts precise synchronization of pressurization and lifting power, which can realize the free opening and convergence of the enlarged body, and ensure the hole formation of different pile-type straight rod segments and thread segments. Pile into piles.
- the double-extrusion pile-expanding method of the present invention in the process of multi-pushing and expanding the drilling tool for more than three times, the multi-type squeeze-drilling tool is used for drilling, lifting and reaming.
- the soil in the pile hole is squeezed into the side wall of the pile hole, so that the effect of compacting the soil around the pile and the soil at the end of the pile is better than that of the existing non-squeezed pile and the squeezed pile, and according to The design needs to expand the pile to form one or more enlarged heads, thereby greatly improving the soil friction resistance of the pile side and the bearing capacity of the pile end soil.
- the double-extrusion pile-forming method of the present invention in the process of drilling and lifting and squeezing and expanding, according to the sensitivity of the soil body, the soil is reasonably compacted, so that it can avoid the non-quenching pile method in the pile-forming process.
- the double-extrusion piles completed by the double-extrusion piles of the present invention have the bearing capacity more than the pile-type piles and the three-forked piles.
- Significant advantages such as high height, smaller settlement, better quality, lower cost, less energy consumption, higher work efficiency and more environmental protection. Therefore, the double-extrusion pile-forming method of the present invention has outstanding substantive features and remarkable technological progress.
- the double-extrusion pile-forming method and the double-extrusion pile-forming device of the invention have faster construction speed, and the double-extrusion pile-forming method and the double-extrusion pile-forming device of the invention, the pile High quality and can be complex in many ways Construction work under quality conditions.
- Figure 1 is a schematic view showing the structure of the double-extrusion drilling and expanding tool of the present invention when it is not opened.
- FIG. 2 is a top plan view of the double extrusion drilling tool of the present invention when it is not opened.
- Figure 3 is an enlarged view of a portion A-A of Figure 1.
- Figure 4 is a schematic view showing the structure of the double extrusion drilling and expanding tool of the present invention.
- Figure 5 is a plan view of the double extrusion drilling tool of the present invention when it is opened.
- Figure 6 is an enlarged view of a portion B-B of Figure 4.
- Figure 7 is an assembly view of a double extrusion drilling tool of the present invention.
- Figure 8 is a cross-sectional view of the double-extrusion drill casing of the present invention separated from the drill tip.
- Figure 9 is a cross-sectional view showing the split of the double extrusion drilling tool casing and the drill tip of the present invention.
- Figure 10 is an enlarged cross-sectional view of the present invention.
- Figure 11 is a schematic cross-sectional view showing the enlarged full thread of the present invention.
- Figure 12 is a schematic cross-sectional view showing a transitional enlarged shallow thread of the present invention.
- Figure 13 is a schematic cross-sectional view of an enlarged shallow thread of the present invention.
- Figure 14 is a schematic cross-sectional view showing the formation of a cylinder in the present invention.
- Fig. 16, Fig. 17, Fig. 18, Fig. 19, Fig. 20, Fig. 21, Fig. 22, Fig. 23 are flow charts showing the construction of the double-extrusion pile-forming method of the present invention.
- the double extrusion-expanding pile device designed by the present invention comprises a double-extrusion drilling tool and a control system thereof, the double-extrusion drilling tool comprising a drill pipe, and a drill bit in the drill pipe
- the threaded section is provided with a plurality of enlarged bodies;
- the drill rod comprises a hollow outer sleeve 7 and an inner sleeve 9 disposed in the outer sleeve tube, the upper part of the outer sleeve is connected with the ordinary drill rod 19, and the bottom of the outer sleeve is provided with more than one circumferential distribution
- Outer casing boss 8 is provided inside the outer casing a sliding groove 10 for linear sliding of the inner sleeve, a valve 11 for pressing the pile material is arranged at the lower part of the inner sleeve, and a transition plate 12 is arranged at a position below the inner casing valve 11, and the lower surface of the inner sleeve is connected
- a sliding groove 10 for linear
- the drill tip can also be directly designed with more than one one-way valve at the bottom of the drill tip, and the concrete flows directly from the one-way valve.
- the concrete is pumped by the pump truck, enters the drill pipe through the concrete pipe, and is poured into the pile through the hollow concrete pipe to reach the drill tip 16.
- the quadrangular pyramid drill tip 16 may also be an isosceles triangle, a triangular pyramid, a pentagonal pyramid or the like.
- the upper portion of the quadrangular pyramid drill tip is a hexagonal prism groove 17, which is connected to the connecting body 13.
- a plurality of alloy drill teeth 18 are mounted on the ribs and tips of the drill tip.
- the cross-sectional area of the pyramid tip can be increased to accommodate the construction of the harder soil layer.
- the conical transition plate 20 is distributed between the two edges of the drill tip. The conical transition plate 20 makes the drill tip easier to drill, and squeezes the soil to the soil on both sides. When the improved design is adopted, the conical transition plate can be used as a concrete control flow. One-way door.
- the enlarged body is disposed on the thread along the Archimedes spiral, and includes an enlarged female tooth 1, a rotating arm 5 and a sliding arm 6, wherein the enlarged female tooth is a segment of the complete thread, and the enlarged ends of the female tooth are limited
- the position device has an enlarged sliding groove 3 in the enlarged female tooth, and one end of the enlarged sliding groove has a hinge point 4, and the rotating arm 5 is connected to the enlarged sliding groove 3, and one end is hinged with the sliding arm 6, and one end of the sliding arm and the rotating arm Hinged, one end is fitted in the enlarged chute 3 to slide.
- the enlarged body When the drill pipe rotates clockwise, the enlarged body is initially in a convergent state; when the drill pipe rotates counterclockwise, under the joint action of the pile driver torque, the geotechnical friction, the pressure, etc., the rotating arm 5 in the enlarged female tooth 1 is enlarged. Slides toward the hinge point 4 and rotates clockwise with the pivoting arm 5 until the extended state of the extreme position. The expanding body in the expanded state is easy to return to the convergence state under the counterclockwise force.
- the enlarged female teeth of the enlarged body and the thread of the drill thread are arranged at a pitch, and the cross section of the enlarged female tooth is a polygonal cross section, and the root thickness is larger than the thickness of the tooth top, and the enlarged body
- One end of the sliding arm 6 is cylindrical and slides in the enlarged chute 3, and the thickness of the half-moon portion of the rotating arm and the sliding arm is smaller than the thickness of the crest of the enlarged female tooth and smaller than the thickness of the end cylinder.
- the arms are in an enlarged state, the hole-to-hole distance
- Both arms are in an enlarged state, and the two sliders are at an angle.
- the angle between the enlarged bodies is such that the detachment space of the rotating arm 5 and the sliding arm 6 is secured.
- the number of turns formed by the enlarged body should be more than one turn.
- the design uses two enlarged bodies to form an enlarged body group. Each two enlarged body groups are arranged at 30°, and the total number of turns is more than one turn.
- the design uses six enlarged body groups, a total of three and a half circles. The number and arrangement of the bodies along the spiral are similar to the scope of the patent claims.
- the control system adopted by the invention uses an advanced automatic control system to complete the dual power of the pile driver _ the matching control of the pressure lifting power and the rotary power of the drill pipe.
- the pressure boosting power controls the speed at which the drill pipe is drilled (or lifted), and the rotary power controls the drill pipe speed.
- the pile formed by the poured pile material is threaded; when the drill pipe is raised or lowered by one lead S, the number of revolutions is several turns,
- the pile body formed by pouring the pile material is substantially cylindrical.
- Different numbers of threads are within the scope of this patent claim.
- the automatic reversal of the drill pipe can be controlled by an automatic control system as needed: 1) the drill pipe is reversing, 2) the expansion body is passively converged and expanded. 3) The speed at which the drill pipe is lifted V maintains a different mathematical relationship with the drill pipe speed w to achieve the following four basic pile shapes:
- the above 1) to 4) list the four node velocities. On the basis of this, by infinitely changing the speed V and the rotational speed w, theoretically, a myriad of transition shapes can be formed. The n types of double-extrusion piles according to the present invention can be formed by free combination of the above different pile shapes.
- the pile forming method of the double extrusion-expansion pile device comprises the following steps:
- the pile rig is started, the torque in the clockwise direction and the downward axial pressure are applied, and the drilling tool is used to drill the pile equipment.
- the extrusion hole is expanded into a hole, and the diameter of the pile hole after the extrusion is the outer diameter of the drill pipe, and the drilling and expansion of the drilling tool of the double-pushing pile device is squeezed into a hole until the device is reached. The hole is deep.
- the process is always in an expanded state; the concrete pump is started at the same time as the drilling tool of the double-squeezing and expanding pile equipment starts to be lifted up, and the inner casing 9 is separated from the outer duct 7 under the pressure of the concrete pump, the inner casing 9 slides in the chute 10 until the limit pin hole 2, at this time in a separated state; the concrete passes through the hollow concrete conveying pipe, rushes out from the inner casing valve 11, and quickly fills the drill tip and buryes the regulation Above the height; during the lifting of the drill for the compounding and expanding into the pile equipment, the concrete is continuously pumped and always above the specified valve height.
- the lifting speed is equal to the product of the rotation speed and the end thickness of the screw, and the double-squeezed shallow-threaded pile is obtained (see FIG. 17).
- the inner diameter of the drill pipe thread is ch, the outer diameter d 2 , the pitch S; when the pile is piled, the enlarged shallow thread pile inner diameter d 2 , outer diameter d 2 + L, pitch c.
- the pile rig is started to rotate counterclockwise, so that the formed hole body is further expanded and squeezed by the enlarged body of the device, forming and equipment. Expanding a part of the cylinder of equal diameter, then lifting the drill and pumping the concrete, keeping the lifting speed no more than the product of the rotating speed and the thickness of the rotating arm until the pile is pressed to the top of the pile to form a double-studded unthreaded pile. (Figure 18).
- the inner diameter of the drill pipe thread is ch, the outer diameter d 2 , the pitch S; when the pile is piled, the enlarged outer diameter of the cylinder is d 2 + L, and no screw.
- the pile rig is started to rotate counterclockwise, so that the formed hole body is further expanded and squeezed by the enlarged body of the device, forming and equipment. Expanding a part of the cylinder of equal diameter, then drilling and lifting the drill and continuously pumping the concrete.
- the pile rig rotates clockwise in place to convert the enlarged body into a convergent state, keeping Rotation speed and lifting speed until the pile material is pressed to the top of the pile top to form a double-extrusion pile with an enlarged head ( Figure 19).
- the inner diameter of the drill pipe thread is ch, the outer diameter d 2 , the pitch S; when the pile is piled, the outer diameter of the pile is ch, the outer diameter of the enlarged head is d 2 + L, and there is no screw.
- the above steps of forming the enlarged head are repeated at any position of the pile hole, and the double-extended and enlarged head pile with a plurality of enlarged heads of the pile body can be formed (Fig. 20).
- the pile body has n (n ⁇ l) enlarged heads, and the sum of the enlarged head heights is smaller than the pile length.
- the pile driller is rotated counterclockwise to expand the expansion body of the double-extrusion pile-forming device, and the lifting speed is maintained at a speed equal to the rotation speed and The product of the thread lead, the concrete is continuously pumped while the drilling tool of the double-extrusion pile-forming equipment starts to be lifted up; the part to be drilled rises to the straight section, the counterclockwise torque is applied, and the enlarged body is converted into the expansion State; when the space in which the enlarged body is placed is extruded into a cylinder, and the concrete is filled, the torque in the clockwise direction is continued; the lifting speed of the drilling tool is not greater than the product of the rotating speed and the thickness of the rotating arm until the pile is pressed Until the top of the pile is raised, a double-studded full-thread screw pile is formed (Fig.
- the pile type is the upper part of the straight rod is threaded, or the upper part is the lower part of the thread is a straight rod, and the length of the two is adjustable.
- the inner diameter of the drill pipe thread is ch, the outer diameter d 2 , the pitch S;
- the outer diameter of the straight rod section is d 2 + L, the inner diameter of the thread segment ch, the outer diameter of the thread segment d 2 + L , pitch S.
- the pile rig is rotated counterclockwise to expand the expansion of the double squeezing into the pile device, and the lifting speed is maintained at a speed equal to the rotation speed and The product of the thick end of the screw, the concrete is continuously pumped while the drilling tool of the double-extrusion pile-forming equipment starts to be lifted up; the tool to be drilled rises to the straight section, the counterclockwise torque is applied, and the body transformation is performed.
- the inner diameter of the drill pipe thread is ch, the outer diameter d 2 , the pitch S; when the pile is piled, the outer diameter of the straight rod section is d 2 + L, the inner diameter of the threaded section is d 2 , and the outer diameter of the threaded section is d 2 + L, pitch c.
- the drill pipe is vertically changed from the ground to a certain angle of the drill pipe and the ground course, and other pile forming schemes are similar to the above technical solutions and improved technical solutions, in particular, the improved technology of the present invention is applied.
- the program can be used as a bolt at 3 o'clock. ( Figure 23)
Abstract
Description
Claims
Priority Applications (2)
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US15/032,564 US9816244B2 (en) | 2013-10-27 | 2014-07-02 | Pile-forming method for compound extruded and expanded pile and pile-forming equipment for compound extruded and expanded pile |
JP2016550916A JP6335319B2 (ja) | 2013-10-27 | 2014-07-02 | 複合型押し拡げ杭の杭形成工法及び複合型押し拡げ杭の杭形成設備 |
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CN201310515642.0A CN103556625B (zh) | 2013-10-27 | 2013-10-27 | 复式挤扩桩成桩工法及复式挤扩成桩设备 |
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CN106400788A (zh) * | 2016-09-18 | 2017-02-15 | 浙江华展工程研究设计院有限公司 | 一种混合灌注桩成桩装置与成桩方法 |
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CN106759302A (zh) * | 2017-01-17 | 2017-05-31 | 上海智富建设工程有限公司 | 一种膨胀抗拔桩及其施工机械和施工工艺 |
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CN109025809A (zh) * | 2018-10-11 | 2018-12-18 | 李广信 | 多动力导位联动复合钻具、制备方法及桩型 |
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CN114232609A (zh) * | 2021-12-09 | 2022-03-25 | 中国一冶集团有限公司 | 灌注桩钢筋笼抗浮装置及其施工方法 |
CN115125938A (zh) * | 2022-07-05 | 2022-09-30 | 刘守进 | 一种内置预制管桩的复合桩施工方法 |
CN115125938B (zh) * | 2022-07-05 | 2023-12-29 | 刘守进 | 一种内置预制管桩的复合桩施工方法 |
CN115387337A (zh) * | 2022-08-16 | 2022-11-25 | 浙江大学 | 具有桩侧自膨胀扩大器的预制管桩施工方法 |
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JP2016535187A (ja) | 2016-11-10 |
US9816244B2 (en) | 2017-11-14 |
US20160244932A1 (en) | 2016-08-25 |
CN103556625A (zh) | 2014-02-05 |
JP6335319B2 (ja) | 2018-05-30 |
CN103556625B (zh) | 2015-06-03 |
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