KR102349513B1 - Pile construction method using assistant pile - Google Patents

Abstract

The purpose of the present invention is to provide a pile construction method using an assistant pile, enabling a main pile to be constructed with high quality in a narrow place by using a dual pile formed by connecting the main pile and an assistant pile. To this end, the pile construction method using an assistant pile, applied in a narrow area, comprises: a pile preparation step of preparing a dual pile by connecting a main pile and an assistant pile in a longitudinal direction; a drilling step of making a hole in the ground with equipment to a depth including a foundation bed and a support layer; a pile input step of inserting the dual pile into the hole with the main pile being positioned at a lower part of the dual pile; a hitting step of hitting an end of the dual pile to fix the dual pile to the hole; a quality test step of carrying out multiple tests to determine construction characteristics of the dual pile; a pile separation step of separating the assistant pile from the main pile and removing the same from the hole; and an excavation step of excavating from the ground to the foundation bed.

Description

Pile construction method using assistant piles {Pile construction method using assistant pile}

The present invention relates to a pile construction method using an auxiliary pile, and more particularly, to a pile construction method using an auxiliary pile for a narrow area.

In general, concrete pile foundation construction methods include the PHC pile method, which transports and uses pre-made piles, and the on-site pile construction method, which directly manufactures and constructs piles on site.

Among them, the PHC pile method also includes the driving PHC pile method in which the PHC pile is driven and installed directly on the ground, and the excavation hole is first created using excavation equipment, the PHC pile is inserted into the drilling hole, and then the head is press-fitted or It is divided into the buried PHC pile method, which is installed by hitting, but it is generally selected appropriately depending on the site situation or use.

Here, the PHC pile is a prestressed hollow concrete pile that is molded and manufactured using the centrifugal force generated when the internal steel, spiral reinforcing wire, and high-strength concrete to which tension is applied is put into a circular mold, and the mold is rotated at high speed. It is widely used due to its superior strength characteristics, and peripheral technologies for various improvements and construction convenience have been proposed.

For example, there may be mentioned Patent Registration No. 1226236, the invention is a hollow extending in the longitudinal direction and a member extending in the longitudinal direction comprising a plurality of internal steel materials spaced apart from each other at predetermined intervals along the circumferential direction In the hollow PHC pile, the steel material extending long in the longitudinal direction, the reinforcing steel material is arranged in a plurality of spaced apart from each other at predetermined intervals along the circumferential direction; An annular member comprising: a connecting member coupled to the reinforcing steel to maintain a gap between the reinforcing steels; A hollow PHC pile comprising a; is provided to penetrate through the connection member in the vertical direction, the internal steel material is inserted into the fixing hole can be fixed without moving in the horizontal direction; is disclosed.

In addition, there may be mentioned Registered Patent No. 1521263. The invention is a PHC pile joint in which the piles manufactured through the PHC method are vertically connected along the axial direction so that the caps are fixed on both sides and an empty hollow is formed therein, so that the upper pile and the lower pile are connected by a joint of the same outer diameter and; A plurality of fixing blocks that the joint is raised at equal intervals to form a circle along the circumference of the cap on the upper surface of the lower pile; an upper joint plate mounted on the upper surface of the fixing block and having a hollow portion; a fixing bolt screwed to the cap of the lower pile through the fixing block while the head is caught in the head insertion groove formed on the upper surface of the upper joint plate and does not protrude to the upper surface; A PHC pile joint including a plurality of lock bolts each having a head engaged on a bottom surface of the upper joint plate and screwed to a cap of the upper pile is disclosed.

On the other hand, if we look at the general pile construction method in detail, it is common to first excavate the ground that forms the basement floor to the bottom of the foundation, then drill a hole in the bottom of the foundation, and construct a pile, but in a narrow area like constructing a single building. In the case of constructing a building on the ground floor, after excavating the ground to the bottom of the foundation, there is not enough space to construct the pile, so before excavating the ground, drill the hole and insert the weekend pile into the hole. The method of constructing a weekend pile is carried out.

However, since the pile construction method in a narrow area as described above is constructed in a state in which the weekend pile and the auxiliary pile are separated, there is a disadvantage in that it is not possible to accurately perform a quality check test to check the construction state of the weekend pile.

The present invention has been devised to overcome the disadvantages of the prior art as described above, and pile construction using auxiliary piles that can construct the main pile with high quality in a narrow place using a double pile connecting the main pile and the auxiliary pile The purpose is to provide a method.

In the pile construction method using an auxiliary pile applied to a narrow area to achieve the above object, the pile preparation step of preparing a double pile connecting the main pile and the auxiliary pile in the longitudinal direction; A drilling step of forming a hole in the ground using equipment to a depth including the foundation floor and the support layer; a pile input step of inserting the double pile into the hole so that the main pile is located at the lower part; hitting the end of the double pile to fix the double pile to the hole; A quality test step of performing a plurality of tests to determine the construction characteristics of the double pile; A pile separation step of separating the auxiliary piles from the main piles and removing them from the hole; And it characterized in that it comprises the excavation step of excavating from the ground to the bottom of the foundation.

Preferably, in the pile input step, the end of the double pile is characterized in that it is disposed on the outer surface of the hole.

Preferably, in the pile input step, the upper end of the main pile is characterized in that it is located on the base floor.

Preferably, in the pile preparation step, the main pile includes a plurality of nuts disposed on the upper surface, and the auxiliary pile includes an attachment hole, and a bolt is inserted into the attachment hole and coupled to the nut to form a main pile and It is characterized in that it connects the auxiliary pile.

More preferably, the auxiliary pile is characterized in that it further comprises an operation tool for fastening and separation of the bolt and the nut.

More preferably, the operation tool is connected to the wrench part and the wrench part into which the bolt head is inserted, and includes a long rod coupled to the auxiliary pile to enable transport and rotation in the longitudinal direction and an end formed at the end of the long rod. characterized in that

More preferably, the wrench part is characterized in that an insertion hole into which a separate member is inserted in order to rotate the wrench part is formed.

Preferably, the test performed in the quality test step is characterized in that the dynamic load test and penetration and rebound check-in.

Preferably, the attachment is characterized in that it further comprises a fastening screw for screwing with the inner diameter of the auxiliary pile.

More preferably, the long rod is characterized in that it is coupled with the auxiliary pile by a plurality of supports attached to the outer surface of the auxiliary pile.

Preferably, the attachment hole includes a fastening screw part for screwing with the inner diameter of the auxiliary pile, a connecting part extending to the fastening screw part, a disc part formed at an end of the connecting part, and a coupling hole formed in the disc part, the The long rod is characterized in that it is coupled with the auxiliary pile by a plurality of supports attached to the inner diameter of the auxiliary pile.

In the pile construction method using auxiliary piles according to the present invention, after constructing the main pile on the ground using a double pile including an auxiliary pile connected and coupled with the end of the main pile in advance, the quality test of the main pile is performed with double piles Thus, after fully understanding the characteristics of the construction of the main pile, it proceeds by separating the auxiliary pile, which has the effect of accurately constructing the main pile in a narrow space.

1 is a flowchart of a pile construction method using an auxiliary pile according to the present invention;
Figure 2 is a block diagram of the main pile, auxiliary pile and double pile prepared in the pile preparation step shown in Figure 1,
Figure 3 is another embodiment of the attachment shown in Figure 2,
Figure 4 is a state diagram of Figure 3 coupled to the pile,
Figure 5 is an explanatory view of the drilling step shown in Figure 1,
Figure 6 is an explanatory view of the pile input step shown in Figure 1,
7 is an explanatory view of the putt stage shown in FIG. 1,
Figure 8 is an explanatory view of the pile separation step shown in Figure 1,
9 is an explanatory view of the excavation step shown in FIG. 1 .

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but between each component another component It is to be understood that may also be “connected”, “coupled” or “connected”.

As shown in Figure 1, the pile construction method using the auxiliary pile according to the present invention is a pile preparation step (S1), a drilling step (S2), a pile input step (S3), a pounding step (S4), a quality test step ( S5), including a pile separation step (S6) and an excavation step (S7).

Hereinafter, each step will be described in detail.

Pile preparation step (S1)

The pile preparation step (S1) is a step of preparing the double pile 50 by connecting the main pile 10 and the auxiliary pile 20 to be constructed with each other.

As the main pile 10, PHC piles may be used as piles used in actual building construction, and if necessary, steel pipe piles may be applied.

However, as shown in FIG. 2 , the main pile 10 is configured in a cylindrical shape and includes a nut 11 to which a bolt can be coupled to both end surfaces.

If the main pile 10 is a PHC pile, it may be a PC nut connected to the inside with a steel wire, and if other piles are used, the nut 11 as described above is mounted.

The nut 11 is preferably disposed in a form that does not protrude from the main pile 10 .

On the other hand, since the auxiliary pile 20 can be used repeatedly, it is preferable to apply a steel pipe pile, and as shown in FIG. 2 , one end is configured to include an attachment port 30 for coupling.

The attachment port 30 includes a cylindrical fastening screw part 31 screwed with the inner diameter of the auxiliary pile 20, a disk part 32 formed at the end of the fastening screw part 31, and the nut 11 and It is configured to include a plurality of coupling holes 34 formed at corresponding positions.

The fastening screw part 31 is for coupling with the inner diameter of the auxiliary pile 20, of course, a screw corresponding to the fastening screw part 31 is formed in the auxiliary pile 20 in the inner diameter.

In addition, it includes an operation tool 40 coupled with the auxiliary pile 20 so as to be transportable and rotatable in the longitudinal direction of the auxiliary pile 20 at the point where the coupling hole 34 is located.

The manipulation tool 40 includes a wrench part 41 for accommodating the bolt head part and a long rod 42 connected to the wrench part 41 , wherein the long rod 42 is in the longitudinal direction of the auxiliary pile 20 . , and is rotatably coupled with the auxiliary pile 20 by a 'U'-shaped support 25 attached to the outer diameter of the auxiliary pile 20 by welding or the like.

In addition, the end 44 of the long rod 42 is configured in a square or hexagonal shape so that the operation tool 40 can be rotated.

On the other hand, since the upper end of the auxiliary pile 20 is then put on, the end 44 is the entire long rod ( 42) set the length.

In addition, a plurality of insertion holes 43 into which a separate member can be inserted in order to rotate the entire operation tool 40 may be formed in the wrench part 41 .

Therefore, when a separate member is inserted into the insertion hole 43 of the wrench part 41 after inserting the bolt into the coupling hole 34 and then rotated, the bolt can be coupled with the nut 11, , the main pile 10 and the auxiliary pile 20 can be combined with each other.

In addition, when the end 44 of the long rod 42 is rotated after coupling the wrench part 41 to the head of the bolt, the coupled bolt can be separated from the nut 11 .

That is, when the main pile 10 and the auxiliary pile 20 are connected, the bolt is fastened using the coupling hole 34 to prepare a double pile 50, and the main pile 10 and the auxiliary pile ( When the 20) is separated, since the double pile 50 is inserted into the ground, the end 44 is operated to remove the bolt.

Of course, when the separation of the bolts is inappropriate, the fastening screw 31 is separated from the auxiliary pile 20 when the auxiliary pile 20 itself is rotated after the operation tool 40 is transferred and fixed in the upward direction, The auxiliary pile 20 may be finally separated.

The configuration of the attachment port 30 as described above is a configuration that is applied when the diameter of the auxiliary pile 20 is smaller than the diameter of the main pile 10, but when the diameter is similar to or larger than the diameter of the main pile 10, see Fig. 3 and 4 can be applied to other types of attachments 30 as shown.

The attachment port 30 includes a cylindrical fastening screw part 31 coupled with the inner diameter of the auxiliary pile 20, a connecting part 33 extending in the vertical direction from the end of the fastening screw part 31, and the connecting part 33 Including a plurality of coupling holes 34 formed at positions corresponding to the nut 11 at the disc part 32 formed at the end and the connecting part 33 in the disc part 32 is not formed. is composed

In addition, in the attachment port 30 as described above, the manipulation tool 40 is located in the inner diameter of the auxiliary pile 10, and also in the inner diameter of the auxiliary pile 10, a 'U'-shaped support member 25 A plurality of are installed to couple the operation tool 40 so as to be vertically transportable and rotatable.

In addition, if necessary, a separate annular plate may be added to the inner diameter part of the end of the fastening screw part 31, and a hole into which the long rod 42 is inserted is formed in the plate, and the hole is the coupling hole 34. to be formed in the same position as

Even in the case of applying the attachment port 30 as described above, the coupling and separation of the main pile 10 and the auxiliary pile 20 is the same as the method of applying the previous attachment hole 30 .

perforation step (S2)

When the double pile 50 is prepared through the pile preparation step (S1), as shown in FIG. 5, a drilling step (S2) of forming a hole (2) in the vertical direction to the ground (1) through a friendly operation (S2) is performed

The drilling operation is performed using equipment such as an auger screw, and the hole (2) is formed to a depth passing through the base floor (4) and the support layer (3).

The foundation floor 4 is a depth for forming a building underground space, and in general, the floor of the lowest basement floor is located on the foundation floor 4 .

In addition, the auger screw may, if necessary, put cement or the like into the lower end of the hole 2 formed through a drilling operation.

On the other hand, the hole 2 is composed of a diameter that can accommodate the double pile 50, the depth is formed in a size that allows some of the double pile 50 to protrude out of the ground.

The drilling step (S2) is generally performed before excavating the ground, unlike the method in which the ground 1 is first excavated to the foundation floor 4, so it is possible to overcome the disadvantage of not being able to use separate equipment according to the narrow place. can

Pile input step (S3)

The pile input step (S3) is a process of putting the double pile 50 prepared through the preparation step (S1) into the hole 2 formed through the drilling step (S2).

At this time, the double pile 50 is such that the main pile 10 is arranged in the downward direction, and the auxiliary pile 20 is located at the top.

The double pile 50 is put into the hole 2 using equipment such as a separate crane, as shown in FIG. 6 .

Putting Step (S4)

The putting step (S4) is a process of hitting the upper end of the double pile 50 input through the pile input step (S3) using a drop hammer, etc., as shown in FIG. 7, to seat it in the hole 2 to be.

In addition, if necessary, if there is insufficient cement at the bottom of the hole (2), it is possible to add cement milk between the inside of the hole (2) and the main pile (10).

In addition, the hammer may be applied in a method other than the drop type.

Quality test step (S5)

The quality test step (S5) is a process of performing a test on the double pile 50 constructed through the pounding step (S4).

At this time, the test is performed with respect to the double pile 50 in which the main pile 10 and the auxiliary pile 20 are combined, in particular, hitting the drop hammer at the end of the double pile 50, that is, the end of the auxiliary pile 20. while performing the necessary tests.

The test performed through the quality test step (S5) includes a dynamic load test and a penetration and rebound check, and, if necessary, other additional tests are also possible.

Through the quality test, it is possible to accurately check the construction state of the main pile 10 .

Pile separation step (S6)

After confirming the good construction state of the main pile 10 through the quality test step (S5) in the pile separation step (S6), as shown in FIG. 8, the auxiliary pile attached to the top of the main pile 10 ( 20) is separated and removed from the hole (2).

At this time, when the long rod 42 of the auxiliary pile 20 is manipulated so that the wrench part 41 is coupled to the bolt head, and the end 44 of the long rod 42 is rotated, the bolt fastened to the nut 11 . Since they are separated, the auxiliary pile 20 can be separated from the main pile 20 .

Of course, the separated auxiliary pile 20 is reusable.

excavation step (S7)

The excavation step (S7) is a process of excavating the ground to the foundation floor (4) when the auxiliary pile (20) is separated through the pile separation step (S6).

When the process is completed, as shown in FIG. 9 , the formation of the underground space for the formation of the stratum is completed, and thereafter, the construction is performed in the same manner as in the normal building construction.

What has been described above is only an embodiment for implementing the pile construction method using the auxiliary pile according to the present invention, and the present invention is not limited to the above embodiment, and departs from the gist of the present invention claimed in the claims below. Without this, anyone with ordinary knowledge in the technical field to which the present invention belongs will say that the technical spirit of the present invention exists to the extent that it can be implemented with various modifications.

1: Ground 2: Hall
3: foundation floor 4: support layer
10: main stake 11: nut
20: auxiliary pile 25: support
30: mounting hole 31: number of fastening screws
32: disk part 33: connection part
34: coupling hole 40: operation tool
41: wrench part 42: long rod
43: insertion hole 44: end
50: double pile S1: pile preparation stage
S2: drilling step S3: pile loading step
S4: Putting Stage S5: Quality Testing Stage
S6: Pile separation stage S7: Excavation stage

Claims (11)

In the pile construction method using an auxiliary pile applied to a narrow area,
A pile preparation step of preparing a double pile connecting the main pile and the auxiliary pile in the longitudinal direction;
A drilling step of forming a hole in the ground using equipment to a depth including the foundation floor and the support layer;
A pile input step of inserting the double pile to be seated in the hole so that the main pile is located in the lower part;
hitting the end of the double pile to fix the double pile to the hole;
A quality test step of performing a plurality of tests to determine the construction characteristics of the double pile;
A pile separation step of separating the auxiliary piles from the main piles and removing them from the hole; and
An excavation step of excavating from the ground to the bottom of the foundation,
In the pile preparation step, the main pile includes a plurality of nuts disposed on the upper surface,
The auxiliary pile includes an attachment hole, and a bolt is inserted into the attachment hole and coupled to the nut to connect the main pile and the auxiliary pile,
The auxiliary pile is a pile construction method using an auxiliary pile, characterized in that it further comprises a manipulation tool for fastening and separating the bolt and the nut.
The method according to claim 1, wherein the end of the double pile in the pile input step is pile construction method using an auxiliary pile, characterized in that disposed on the outer surface of the hole.
The method according to claim 1, wherein the upper end of the main pile in the pile input step is a pile construction method using an auxiliary pile, characterized in that located on the base floor.
delete delete The method according to claim 1, wherein the manipulation tool is connected to the wrench part and the wrench part into which the bolt head is inserted, and comprising a long rod coupled to the auxiliary pile to enable transport and rotation in the longitudinal direction and an end formed at the end of the long rod. A pile construction method using an auxiliary pile, characterized in that.
The method of claim 6, wherein the wrench unit has an insertion hole into which a separate member is inserted to rotate the wrench unit.
The method according to claim 1, wherein the test performed in the quality test step is a pile construction method using an auxiliary pile, characterized in that the dynamic load test, penetration and rebound check-in.
The method according to claim 6, wherein the attachment hole pile construction method using an auxiliary pile, characterized in that it further comprises a fastening screw for screwing with the inner diameter of the auxiliary pile.
The method according to claim 9, wherein the long rod is a pile construction method using an auxiliary pile, characterized in that coupled to the auxiliary pile by a plurality of support members attached to the outer surface of the auxiliary pile.
The method according to claim 9, wherein the attachment hole comprises a fastening screw portion screwed with the inner diameter of the auxiliary pile, a connecting portion extending to the fastening screw portion, a disk formed at an end of the connecting portion, and a coupling hole formed in the disk portion, The long rod is a pile construction method using an auxiliary pile, characterized in that coupled to the auxiliary pile by a plurality of supports attached to the inner diameter of the auxiliary pile.

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