KR102082333B1 - Prestressed pile and Self reliance retaining wall construction method using the same - Google Patents

Abstract

The present invention relates to a pre-stressed H-pile and a one-column self-reliance retaining wall construction method using the same, which enables easy separation of a pre-stressing means for adjusting tension according to ground conditions to support earth pressure against the rear surface thereof and form tension on the H-pile, thereby facilitating drawing for recycling of the H-pile. Provided are the pre-stressed H-pile comprising: an H-pile; and the pre-stressing means coupled to the H-pile to form tension and having a structure for easing the separation thereof, and the one-column self-reliance retaining wall construction method using the same. Tension is applied to the H-pile, thereby requiring no support material, having constructability, and reducing construction costs and a construction period, and being capable of adjusting the tension according to the ground conditions, and the pre-stressing means can be easily separated from the H-pile constituting the pre-stressed H-pile, thereby increasing workability and reducing costs.

Description

Prestressed pile and Self reliance retaining wall construction method using the same}

The present invention by using the prestress thumb pile to adjust the tension force in accordance with the ground conditions to support the back earth pressure while the prestressing means for forming the tension force on the thumb pile can be easily separated to facilitate the drawing work for recycling the thumb pile The present invention relates to a prestressed thumb pile and a one-row self-supporting earth retaining method using the same.

Known self-supporting earthquake method is a method to reduce the bending moment caused by the back earth pressure by applying a tension after installing a steel bar or steel wire in the pile. This construction method has the advantage that the installation process of the support material is omitted, compared to other earthquake construction method, it is possible to reduce the air shortage and construction cost by the progress of the smooth excavation work.

As a prior art, Korean Patent Registration No. 10-1609805 (hereinafter referred to as 'Patent Document 1') has proposed a 'prestress-induced thumb pile and a self-standing temporary construction method using the same'.

The patent document 1 introduces a pre-stress to a predetermined length of the rear portion of the H-beam first to produce a thumb pile, and drills the ground into a root entrance that can be sufficiently fixed to the excavation bottom, and after the thumb pile into the drill hole In order to secure the required compressive force by introducing the prestress from the thumb pile secondarily, and to support the back pile pressure that is gradually increased during the excavation surface excavation, the pre-stressed thumb pile is used to support the self-supporting structure. Deep excavation depths were made possible.

However, Patent Document 1 is the upper and lower fixing device for the introduction of the prestress is formed in the thumb pile to introduce the prestress after the entrance of the thumb pile, after the construction is completed in the process of drawing to recycle the thumb pile The buried lower fixing device becomes difficult to draw the thumb pile due to friction with the ground, so that the thumb pile cannot be drawn or deformed even when the thumb pile is pulled out.

Prestress thumb pile according to the present invention for solving the above problems and a one-stage self-supporting earthwork method using the same by sufficiently supporting the earth pressure on the back by introducing a tension force to the thumb pile by the prestressing means formed on the prestress thumb pile The purpose is to provide a prestressed thumb pile and a one-stage self-supporting earthquake construction method using the same, which can be applied to the site with excellent construction properties because it does not require separate support materials, and can be applied to a site with no space. have.

Still another object of the present invention is to construct a curved strand for introducing the tension to the prestressing means for forming a tension in the thumb pile constituting the prestress thumb pile and a straight strand for adjusting the tension force to the tension force according to the ground conditions By adjusting it, it is possible to efficiently form tension force without deformation of the thumb pile.

Another object of the present invention is that the anchorage of the prestressing means for introducing the tension force to the thumb pile constituting the prestress thumb pile is maintained in the state coupled to the thumb pile by the strand wire, so After releasing the coupling, it is possible to easily pull out the thumb pile and the strand, so that the air shortening and the cost reduction according to the drawing of the thumb pile can be recycled without deformation of the thumb pile, thereby reducing the overall cost.

The present invention is sufficient to support the earth pressure of the back by introducing a tension force to the thumb pile by the prestressing means formed on the prestress thumb pile, and requires no additional support material, excellent workability, and can be applied to the site without air, as well as air Shorten construction costs can be reduced.

In addition, by forming a tension strand in the prestressing means for forming the tension in the thumb pile constituting the prestress thumb pile and a straight strand for adjusting the tension force by adjusting the tension force according to the ground conditions Tension force can be formed efficiently without deformation.

In addition, since the anchorage of the prestressing means for introducing tension to the thumb pile constituting the prestressed thumb pile is kept coupled to the thumb pile by the strand, the strands are released from the anchorage when the thumb pile is pulled out. It is a useful invention that can be easily drawn out of the thumb piles and strands and can be recycled without deformation of the thumb pile with the air shortening and the resulting cost reduction according to the drawing of the thumb pile is a useful invention that can reduce the overall cost.

1 is a front view showing a prestressed thumb pile according to the present invention.
2 is a cross-sectional view taken along AA of FIG. 1.
Figure 3 is a state diagram showing a step of forming a hole in the present invention.
Figure 4 is a state diagram showing a prestress thumb pile indentation step in the present invention.
Figure 5 is a state diagram showing the prestress thumb pile tension step after the hole filling step in the present invention.
Figure 6 is a state diagram showing an excavation step in the present invention.
Figure 7 is a state diagram showing the structure construction step in the present invention.
Figure 8 is a state diagram showing a thumb pile drawing step in the present invention.
Figure 9 is a state diagram showing a construction completion step of completing the construction by removing the strand in the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

▣ Prestress Thumb Pile

Prestress thumb pile 50 in the present invention is composed of a prestressing means 20 for forming a tension in the thumb pile 10 and the thumb pile (10).

First, as shown in FIGS. 1 and 2, the thumb pile 10 has an excavation surface side horizontal member 11, a back side horizontal member 12, and a vertical member 13 having an H shape like the conventional thumb piles. It consists of an H beam with a cross section.

Next, the prestressing means 20 is configured to tension the thumb pile 10 as described above so that prestressing can be formed.

The prestressing means 20 is composed of two anchorages 21 and wedges 22 and strands 23 coupled to the anchorages 21.

More specifically, the fixing unit 21 described above is the excavation surface side horizontal member 11 and the vertical member at a position corresponding to the excavation surface side horizontal member 11 and the vertical member 13 constituting the thumb pile 10 to one side. Coupling groove 21a is formed in the shape of a groove thicker than the thickness of 13, and a plurality of wedge coupling holes 21b are formed inside.

Such a fixture 21 is made of two places, one is arranged at one end (top) of the thumb pile 10, the other is disposed at the position (bottom) symmetrical.

In addition, the wedge 22 is a conventional cone shape, and detailed description thereof will be omitted.

Here, the above-described strand 23 is fixed to the anchorage 21 by the wedge 22 formed in the anchorage 21, the wedge coupled to the anchorage 21 is disposed on both ends of the thumb pile 10 ( While maintaining a fixed state by 22) is configured to form a tension force on the thumb pile (10).

Particularly, in the present invention, the wedge coupling holes 21b formed in the above-described fixing tool 21 are respectively provided with two wedge coupling holes on both sides of the excavation surface side horizontal member 11 constituting the thumb pile 10. 21b).

That is, the two wedge coupling holes 21a arranged in a straight line are coupled to the wedge coupling hole 21b in the excavation direction based on the excavation surface side horizontal member 11, and to the wedge coupling hole 21b on the opposite side. The two curved strands 23b arranged in a curved shape are coupled, but the strand strands 23b are further formed in the horizontal member 12 on the rear side of the thumb pile 10, and then the curved strands 23b are formed. It is configured to couple to the strand connecting hole (14).

▣ Earthing method

In the present invention, the retaining method is formed in a position corresponding to the horizontal pile and vertical member of the excavation surface side horizontal member and the rear side horizontal member and the vertical member is formed with the H-shaped cross-section, the horizontal member and the vertical member of the thumb pile A pair of anchorages are formed symmetrically arranged on the upper and lower ends of the thumb pile in which a groove is formed in the shape of a groove thicker than the thickness of the horizontal member and the vertical member. Combination of the anchorage constituting the prestressing means for assembling the prestressed thumb pile consisting of a wedge coupled to the coupling hole and a prestressing means composed of a strand wire coupled to both ends of the wedge coupled to a pair of anchorages formed on the upper and lower ends of the thumb pile. Combine the grooves into the horizontal and vertical members of the thumb pile, and settle two places Is placed on both ends of the thumb pile, the connection of the stranded wire to the wedge coupled to the anchorage and tension the portion of the strand to keep the anchorage fixed to both ends of the thumb pile to complete the assembly of the prestress thumb pile Assembling the rest thumb pile, forming a punching hole for forming a prestress thumb pile in the ground, and a prestress thumb for inserting a prestress thumb pile into the drilling hole formed in the drilling hole forming step. Pre-stressing by tensioning the pile of the pre-stressing means of the pile indentation step, the hole-filling step of filling the perforated hole in which the prestressed thumb pile is entered, and the prestressed thumb pile in the drilled hole. Prestress thumb pile tension step forming, prestress Excavation step of excavating the space formed through the pile to the planned excavation depth, the structure construction step of constructing the structure in the planned space in the excavation step, and the construction of the structure through the structure construction step of the prestressed thumb pile After cutting the strand in the anchorage constituting the prestressing means formed at the top, remove the anchorage of the prestressing means coupled to the top of the thumb pile, and pull out the thumb pile to separate the thumb pile from the anchorage that is coupled to the bottom of the thumb pile. At the same time, the prestressed thumb pile drawing step for drawing the thumb pile and the strands constituting the prestressing means after the prestressed thumb pile drawing step are applied to remove the stranded wire connected to the anchorage coupled to the bottom of the thumb pile. Completed It will be written, including the ball completion.

Here, a plurality of wedge engaging holes are formed in the anchorage constituting the prestressing means of the prestressed thumb pile in the prestressed thumb pile assembly, and two wedge coupling holes are formed around the excavation surface side horizontal member, respectively, and excavated. Wedge coupling holes in the direction in which the ground is excavated centering on the horizontal member on the face side are coupled with a straight strand, and curved strands are coupled to the wedge coupling hole on the opposite side, and a strand wire coupling hole is further formed in the rear horizontal member of the thumb pile. After the strand is characterized in that the coupling to the strand connecting hole.

Hereinafter, to look at in detail the earth blocking method of the present invention using the drawings.

1. Prestress Thumb Pile Assembly

This step is a step for assembling the prestressed thumb pile 50 by combining the thumb pile 10 and the prestressing means 20 described above.

To this end, in the state in which the thumb pile 10 is laid on the ground, the coupling groove 21a of the fixing unit 21 to which the wedges 22 constituting the prestressing means 20 are coupled to both ends (upper and lower). The horizontal members 11 and the vertical members 13 of the excavation surface side of the thumb pile 10 are to be positioned.

Then, one end of the strand 23 is to be coupled to the wedge 22 is coupled to the anchorage 21 is coupled to any one position, the other end of the strand 23 is anchored 21 in the other position The wedge 22 is coupled to the wedge 22, and then the tension line 23 is partially tensioned enough to maintain the state in which the anchorages 21 are coupled to the thumb pile 10, thereby completing the assembly of the prestressed thumb pile 50. do.

Particularly, in this step, the wedge coupling holes 21b formed in the above-described anchorage 21 are respectively provided with two wedge coupling holes on both sides of the excavation surface side horizontal member 11 constituting the thumb pile 10 ( 21b), the wedge engaging hole 21b in the direction in which the excavation is made based on the excavation surface side horizontal member 11 is coupled to the straight strand 23a, and the curved wedge engaging hole 21b on the opposite side. Coupling the strand type wire 23b, and further to form a strand wire coupling hole 13 in the rear side horizontal member 12 of the thumb pile 10 to couple the curved strand wire 23b to the strand wire coupling hole (14). do.

2.Perforation Hole Formation Step

This step is to form a punching hole (1) for inserting the prestressed thumb pile 50 in the planned ground to implement the earthen fence as shown in Figure 3 auger for each position where the prestressed thumb pile 50 will be entered This step can be completed by drilling the ground using the ground drilling equipment 2 for forming a perforation on the ground.

Here, the depth of drilling when the drilling hole 1 is formed through the ground drilling equipment 2 is prestressing means 20 coupled to one end (top) of the thumb pile 10 constituting the prestressed thumb pile 50. It is preferable to drill to a depth such that the fixing unit 21 of) can be exposed to the ground.

3. Prestress thumb pile entry stage

This step is a step of entering the prestress thumb pile 50 using the conventional crane equipment (3) to the drilling hole (1) formed in the drilling hole forming step as shown in FIG.

4.fill hole

In this step, as shown in FIG. 4, when the prestressed thumb pile 50 is entered into the drilled hole 1 through the prestressed thumb pile indentation step, the prestressed thumb pile 50 is supported to support the prestressed thumb pile 50. The step of filling the filling material (4) inside.

Here, the filling material 4 may finish the present step by filling all the spaces of the drilling hole 1 by using the earth or sand discharged to the ground during the drilling of the ground as the filling material (4).

Here, the above-mentioned prestressed thumb pile indentation step and the drilling hole filling step are sequentially performed according to the number of the drilling holes 1 formed.

5. Prestressed Thumb Pile Tension Stage

This step is a step for forming a tension force on the prestressed thumb pile 50 is fixed to the ground through the hole filling step as shown in Figure 4, although not shown in detail in the drawing can stretch the strand 23 When the strand wire 23 is tensioned through a means such as a hydraulic jack, the wire connecting hole is formed at the center of the wedge 22 and the thumb pile 10 of the anchorage 21 coupled to both ends of the thumb pile 10. Tension force is generated in the thumb pile 10 by the strand wire 14 connected to (14) is formed a prestressing force.

Here, in the present invention, the strand 23 is composed of a straight string strand 23a and a curved strand 23b is able to form a variety of tension according to the conditions of the ground.

6. Excavation Step

This step is a general step of excavating the excavation space using a conventional excavator 6 as shown in FIG.

Here, although not shown in detail in the drawing, while proceeding the excavation step, this step may be additionally constructed in the space between the prestress thumb pile 50 buried in the ground and the like.

7. Structure construction stage

This step is to install the projected structure (7) in the excavated space as shown in Figure 7 to omit the detailed description.

8.Prestressed Thumb Pile Drawing Step

This step is to remove the prestressed thumb pile 50 installed for the earthquake method after the construction of the structure 7 is completed to recycle.

To this end, in the present invention, as shown in FIG. 8, the strand 23 is separated from the anchorage 21 exposed to the ground constituting the prestressing means 20 coupled to the thumb pile 10 to separate the anchorage 23. After that, the thumb pile 10 is drawn.

Here, the prestressing means 20 according to the present invention forms a tension force on the thumb pile 10 through two anchorages 21 coupled to both ends (upper and lower ends) of the thumb pile 10, thereby reducing the earth pressure on the back surface. On the other hand, when the thumb pile 10 is drawn out, the thumb pile 10 is formed by a fixing unit 21 coupled to one end (lower end) of the thumb pile 10 embedded in the drilling hole 1. It becomes difficult to draw the cost of drawing the excessively according to the drawing of the thumb pile 10, or the situation that does not draw the thumb pile 10 occurs.

However, the two anchorages 21 constituting the prestressing means 20 according to the present invention do not maintain the self-coupled state to the thumb pile 10, but the strands couple to the two anchorages 21. Since it is maintained in the state coupled to the thumb pile 10 by the (23) when removing the strand 23 from the anchorage 21 coupled to the upper end of the thumb pile 10 as described above the lower end of the thumb pile 10 Fixing with the fixing unit 21 is coupled to the release is to be able to easily be drawn alone only the thumb pile (10).

9. Construction completion stage

In this step, after the extraction of the thumb pile 10 in the prestressed thumb pile drawing step, the thumb pile 10 is drawn and a strong blow is applied to the strand 23 remaining on the ground, which is the remaining space. At the same time to separate the strand 23 from the wedge 22 coupled to the) it is possible to complete the construction by drawing.

As described above, the present invention effectively applies the prestressing force by controlling the tension force on the thumb pile 10 by simultaneously applying the two types of the strand 23 and the curved strand 23a to the curved strand 23a to effectively respond to the earth pressure on the rear surface. Can be.

In particular, the present invention even if the construction in a single row by a self-supporting method to form a sufficient support force, thereby the support material is unnecessary, and excellent construction, it is possible to reduce the construction cost and shorten the air.

In addition, by applying the tension force effectively to the thumb pile (10) can be applied in the site without the site margin, of course, by controlling the two types of straight strands (23a) and curved strands (23b) according to the ground conditions to suppress the effective displacement You can do it.

That is, while forming a tension force for supporting the basic back earth pressure through the curved strand line (23b), through the linear strand line (23a) it is possible to form an efficient tension force by finely adjusting the tension force in accordance with the ground conditions.

In particular, since the above-mentioned prestressed thumb pile 50 fills the filling material 5 after entering the drilling hole 1, the thumb pile during the drawing work of the thumb pile 10 after the formation of the structure 7 through the construction of the earthenware Although the drawing of the thumb pile 10 is difficult due to the frictional resistance between the fixing unit 21 and the filling material 5 coupled to the lower end of the 10, the present invention is embedded in the lower portion only by separating the strand 23. Since the fixing unit 21 is separated from the thumb pile 10, the thumb pile 10 can be easily drawn out, thereby improving the workability according to the drawing of the thumb pile 10 and reducing the cost, When the thumb pile 10 is drawn out, the deformation of the thumb pile 10 does not occur, and thus the reuse is possible, thereby greatly reducing the cost.

Although the above-described embodiments have been described with respect to the most preferred embodiments of the present invention, it is not limited to the above embodiments, and various modifications are possible within the scope without departing from the technical spirit of the present invention. It is obvious to the engineers.

DESCRIPTION OF SYMBOLS 1 Drilling hole 2 Ground drilling equipment 3 Crane equipment 4 Filling material 5 Excavator
7: Structure
10: Thumb pile
11: Excavation surface side horizontal member 12: Back side horizontal member 13: Vertical member
14: stranded connection hole
20 prestressing means
21: anchorage 21a: coupling groove 21b: wedge coupling hole
22: wedge
23: stranded wire 23a: straight stranded wire 23b: curved stranded wire
50: prestressed thumb pile

Claims (4)

A thumb pile having an excavation surface side horizontal member and a rear side horizontal member and a vertical member formed with an H-shaped cross section extending;
It is formed in the position corresponding to the horizontal member and the vertical member of the excavation surface side horizontal member of the thumb pile to form a coupling groove consisting of a groove shape having a thickness larger than the thickness of the excavating surface side horizontal member and the vertical member, the inner side of the wedge coupling hole is formed It consists of a pair of anchorages symmetrically arranged on the upper and lower ends of one thumb pile, wedges coupled to the wedge coupling holes of the anchorage, and a strand connecting both ends to a pair of wedges coupled to the pair of anchorages formed on the upper and lower ends of the thumb pile. It comprises a pre-stressing means,
While the tension is adjusted to the thumb pile by tensioning the strand of the prestressing means, the anchorage constituting the prestressing means for forming the tension is fixed to the thumb pile by the tension of the strand,
A plurality of wedge coupling holes are formed in the anchorage constituting the prestressing means, and two wedge coupling holes are formed around the horizontal surface excavation surface side, and the wedge coupling in the direction in which the ground is excavated around the horizontal surface excavation surface side member. The straight strands arranged in a straight line are coupled to the holes, and the wedge joining holes on the opposite side are coupled to the curved strands arranged in a curved form, and the strand strands are further formed in the horizontal member on the back side of the thumb pile. Prestressed thumb pile characterized by coupling the wires to the strand connecting holes.
delete An excavation surface side horizontal member, a back side horizontal member, and a vertical member formed at a position corresponding to a thumb pile having an H-shaped cross section extending, and an excavation surface side horizontal member and a vertical member of the thumb pile; A coupling groove is formed in the shape of a groove having a thickness thicker than that of the vertical member, and a pair of anchorages symmetrically disposed on the upper and lower ends of the thumb pile having the wedge coupling hole therein and the wedge coupling hole of the anchorage. The coupling groove of the anchorage constituting the prestressing means for assembling the prestressed thumb pile consisting of a prestressing means consisting of a wedge coupled to the pair of anchorages formed at both ends coupled to a pair of anchorages formed on the upper and lower ends of the thumb pile. Combine to fit the horizontal and vertical members of the pile, but thumb the two anchorages After placing on both ends of the stack, prestressed thumb to complete the assembly of the prestressed thumb pile by connecting the stranded wire to the wedge coupled to the anchorage and tensioning a part of the stranded wire to keep the anchorage fixed to both ends of the thumb pile Pile assembly step;
A drilling hole forming step of forming a drilling hole for entering the prestressed thumb pile into the ground;
A prestressed thumb pile indentation step of injecting the prestressed thumb pile into the drilled hole formed in the drilling hole forming step;
Drilling hole filling step of filling the hole punched the prestressed thumb piles;
A prestress thumb pile tension step of tensioning the thumb pile to form a prestress by tensioning the strand of the prestressing means constituting the prestress thumb pile recessed in the perforation hole;
An excavation step of digging a space formed through the prestressed thumb pile to a planned excavation depth;
A structure construction step of constructing a structure in a space planned in the excavation step;
When the construction of the structure is completed through the construction step of the structure, the strands are cut from the anchorage constituting the prestressing means formed on the upper end of the prestressed thumb pile, and then the thumb pile is removed at the same time as removing the anchorage of the prestressing means coupled to the top of the thumb pile. A pre-stressed thumb-pull drawing step of drawing the thumb-pile while separating the thumb-pile from the anchorage which was drawn to the lower end of the thumb-pile;
After completion of the prestress thumb pile drawing step is completed by the thumb pile is drawn to hit the strands constituting the prestressing means in the remaining space to remove the strand wire connected to the anchorage coupled to the bottom of the thumb pile to complete the construction; Including but not limited to
In the prestress thumb pile assembly step, a plurality of wedge coupling holes are formed in the anchorage constituting the prestressing means of the prestress thumb pile, and each of the two wedge coupling holes is formed around the excavation surface side horizontal member, and the excavation surface side horizontal Wedge joining holes in the direction in which the ground is excavated around the members are coupled to the straight strands arranged in a straight line, and wedge joining holes on the opposite side are joined to the curved strands arranged in a curved form, but the horizontal member on the back side of the thumb pile A one-stage self-supporting earth retaining method using prestressed thumb piles, characterized in that the additional strand coupling holes are formed in and the curved strands are coupled to the strand connecting holes. delete

Images