KR102341509B1 - Thumb pile for diaghragm wall and retaining wall construction method using of the same - Google Patents

Abstract

According to the present invention, rotation of thumb piles can be suppressed due to casing removal during installation of thumb piles, and rigidity is reinforced by increasing the cross-section, so that the structural stability of the continuous retaining wall is improved. Provided are a thumb pile for a column-type pile wall and a construction method of a continuous retaining wall using the same.
Thumb piles for column-type pile walls according to a suitable embodiment of the present invention, in the thumb-piles for column-type pile walls used to construct continuous retaining walls, the front and rear surfaces of both sides facing each other in parallel over a certain length A steel beam consisting of a beam flange, a beam web connecting the front and rear beam flanges, and a pair of beam reinforcements joined by welding with the beam web symmetrically on the front beam flange of the steel beam are installed; The beam reinforcement is characterized in that it consists of a vertical reinforcement vertically welded to the front beam flange, and a horizontal reinforcement plate integrally formed at a right angle with the vertical reinforcement and one end welded to the beam web side.

Description

Thumb pile for diaghragm wall and retaining wall construction method using of the same}

The present invention relates to a thumb pile and a method of constructing a continuous retaining wall using the same, and in particular, it is possible to suppress rotation of the thumb pile due to the removal of the casing during installation of the thumb pile, and the rigidity is reinforced by increasing the cross section, so that the structural stability of the continuous retaining wall It is improved, the effect of suppressing the displacement of the adjacent ground is excellent, and it relates to a thumb pile for a column-type pile wall which enables quick construction, and a construction method of a continuous retaining wall using the same.

In general, the cast-in-place pile construction method using a casing is to install a casing at a measured location on the ground, then internal excavation is made, and after inserting the pile into the casing, concrete is poured and the casing is pulled out. work is done Since casing drawing is done before the concrete is cured, the pile is rotated in one direction during drawing. In this case, after the concrete is cured after the casing is pulled out, it is difficult to separate the filling of the grooves in order to install the wale on the pile.

Therefore, there is a need for a technical alternative that can suppress the rotation of the pile when the casing is pulled out in the cast-in-place pile method using auger drilling or casing.

As the background technology of the present invention, as Korean Patent Registration No. 10-0927186, a 'continuous wall construction method for retaining and waterproofing' is proposed. This is a method of constructing a continuous wall using a continuous casing method using a guide. After inserting the casing through the casing guide installed in the ground, excavating the inside of the casing, pulling out the casing while inserting the pile, and connecting the piles with mortar By dismantling the casing guide, one continuous wall structure was built. In this construction method, the casing guide only enables the insertion of the casing, and there is no means or method for suppressing the rotation of the pile when the casing is pulled out.

Korean Patent Registration No. 10-0927186

The present invention is capable of suppressing rotation of a thumb pile due to the removal of the casing during installation of the thumb pile, and the structural stability of the continuous retaining wall is improved by reinforcing the rigidity by increasing the cross-section, the effect of suppressing the displacement of the adjacent ground is excellent, and quick construction is possible An object of the present invention is to provide a thumb pile for a column-type pile wall and a construction method of a continuous retaining wall using the same.

Thumb piles for column-type pile walls according to a suitable embodiment of the present invention, in the thumb-piles for column-type pile walls used to construct continuous retaining walls, the front and rear surfaces of both sides facing each other in parallel over a certain length A steel beam consisting of a beam flange, a beam web connecting the front and rear beam flanges, and a pair of beam reinforcements joined by welding with the beam web symmetrically on the front beam flange of the steel beam are installed; The beam reinforcement is composed of a vertical reinforcement vertically welded to the front beam flange, and a horizontal reinforcement plate integrally integrated with the vertical reinforcement at right angles to one end welded to the beam web side, and the front beam flange has the center of the steel beam A front arc-shaped reinforcing plate having a certain radius is installed from the rear beam flange, and a rear arc-shaped reinforcing plate having the same radius is installed.

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In addition, the front arc-shaped reinforcing plate and the rear arc-shaped reinforcing plate are characterized in that each of the spiral protrusions is further provided to reduce friction during drawing with the casing.

On the other hand, according to the construction method of the continuous retaining wall using the thumb pile for the column-type pile wall of the present invention, (a) designate the back and excavation surfaces as the center of the reference line, and make casing perforations at regular intervals on the rear surface with the reference line as the center. carrying out; (b) inserting the thumb pegs 10 for the column-type pile wall into the perforated hole formed by the casing perforation and then performing a pounding; (c) removing the casing after injecting cement paste or mortar into the drilling hole; (d) forming an SCW wall construction space by performing multi-axial auger excavation between the thumb piles for adjacent column-type pile walls; (e) forming the SCW wall by injecting cement milk, bentonite, and hardening material into the SCW wall construction space during drawing of the multi-axial auger and mixing and agitating with the original ground soil at the same time;

According to the thumb pile for a column-type pile wall of the present invention and the construction method of a continuous retaining wall using the same, the thumb pile is provided with an arc-shaped reinforcing plate so that rotation can be suppressed when the casing is pulled out, and the rigidity is reinforced by increasing the cross section. In addition, the structural stability of the continuous retaining wall is improved by the installation of the thumb pile with an increased cross section, and the effect of suppressing the displacement of the adjacent ground is excellent. In addition, it is possible to quickly construct the SCW wall by mixing and stirring the original soil and soil.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings It should not be construed as being limited.
1A and 1B are a perspective view and a plan enlarged view of a thumb pile according to an embodiment of the present invention.
Figures 2a and 2b is a perspective view and a plan enlarged view of a thumb pile according to another form of the present invention.
3A and 3B are a perspective view of a thumb peg according to another form of the present invention and an enlarged view of part 'A'.
4 and 5 are construction flow charts of a continuous retaining wall to which a thumb pile of one embodiment of the present invention is applied.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

Thumb piles 10 for column-type pile walls according to the present invention are used to construct the retaining wall 200 as shown in (d) of FIG. 5 . In particular, the thumb pile 10 for the column-type pile wall is installed with a reinforcing structure to resist the main earth pressure in the retaining wall 200 .

As shown in FIG. 1 , the thumb pile 10 for a columnar pile wall includes a steel beam 12 and a pair of beam reinforcement 14 joined to the steel beam 12 .

The steel beam 12 is made of steel over a certain length and consists of front and rear beam flanges 121 and 122 on both sides facing in parallel, and a beam web 123 connecting the front and rear beam flanges 121 and 122. As such, the steel beam 12 is composed of front and rear beam flanges 121 and 122 and a beam web 123 to have an H-shaped cross-sectional structure.

A pair of beam reinforcement 14 reinforces the cross section of the steel beam 12, in particular, increases the bending strength. A pair of beam reinforcement 14 is installed by welding the beam web 123 symmetrically to the front beam flange 121 of the steel beam 12 .

The pair of beam reinforcements 14 are all made of steel. The beam reinforcement 14 is a vertical reinforcement 141 vertically welded to the front beam flange 121, and is integrated at a right angle to the vertical reinforcement 141, and one end of the horizontal reinforcement is welded to the beam web 123 side. It consists of a plate (142). As such, the beam reinforcement 14 is made of a vertical reinforcement 141 and a horizontal reinforcement plate 142 at right angles to have a T-shaped structure.

As such, the pair of beam reinforcement 14 is installed on the steel beam 12, in particular, the front beam flange 121 side is reinforced, and the bending strength of the thumb pile 10 for the column-type pile wall is increased, so that it safely resists earth pressure. can do.

On the other hand, the front beam flange 121, as shown in Figure 2, the front arc-shaped reinforcing plate 16 having a predetermined radius (R) from the center of the steel beam 12 may be further installed. In addition, a rear arc-shaped reinforcing plate 18 having the same radius (R) may be further installed on the rear beam flange 122 .

Here, when either or both of the front arc-shaped reinforcing plate 16 and the rear arc-shaped reinforcing plate 18 are installed, when the casing is pulled out in the construction process of the retaining wall, due to abnormal rotation of the thumb pile 10 for the main column type pile wall distortion can be prevented. Therefore, there is no need to worry about poor construction of the thumb pile 10 for the column-type pile wall.

On the other hand, as shown in Figure 3, the front arc-shaped reinforcing plate 16 and the rear arc-shaped reinforcing plate 18 have spiral protrusions 161 and 181, respectively, to reduce friction with the casing 100 when the casing 100 is drawn out. can The spiral protrusions 161 and 181 minimize the contact area with the casing 100 to prevent rotational failure of the thumb pile 10 for the column-type pile wall when the casing 100 is pulled out.

The construction method of the continuous retaining wall using the thumb pile 10 for the columnar pile wall constructed as described above will be sequentially described.

First, as shown in Fig. 4 (a), the base line CL is designated as the back and the excavation surface as the center, and the casing 100 is drilled at regular intervals on the back surface with the reference line CL as the center.

Then, as shown in FIG. 4 (b), the thumb peg 10 for the column-type pile wall is inserted into the perforation hole 102 formed by the perforation of the casing 100, and then putt is performed. Thereafter, the casing 100 is removed after injecting cement paste or mortar into the drilling hole 102 . At this time, it is possible to prevent rotation when using the thumb pile 10 for the column-type pile wall having the front arc-shaped reinforcing plate 16 and the rear arc-shaped reinforcing plate 18.

Then, as shown in Fig. 5 (c), a multi-axis auger excavation is performed between the adjacent thumb piles 10 and 10 for column-type pile walls. Accordingly, the SCW wall construction space portion 5 is formed.

Then, as shown in FIG. 5(d), when the multi-axis auger is drawn out, cement milk, bentonite, and hardening material are injected into the SCW wall construction space 5 and mixed with the original ground soil and agitation to form the SCW wall 11. construct

As described above, according to the present invention, the thumb pile 10 and the SCW wall 11 for the column-type pile wall are continuous, so that the construction of the continuous retaining wall 200 is made. According to this construction method, the thumb pile 10 for the column-type pile wall is reinforced, and thus the effect of suppressing the displacement of the adjacent ground is excellent. In addition, since the SCW wall 11 is made using a multi-axis auger, quick construction is possible. In addition, rotation is suppressed when the casing is removed during construction of the column-type pile wall thumb pile 10, thereby preventing defective construction.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various modifications and modified inventions without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such variations and modifications, but only by the claims appended hereto.

10: Thumb stakes for column-type pile walls
11: SCW wall
12: steel beam
14: beam reinforcement
16: front arc-shaped reinforcing plate
161,181: spiral projection
18: rear arc-shaped reinforcing plate

Claims (5)

In the thumb pile 10 for the column-type pile wall used to construct the retaining wall 200,
A steel beam 12 consisting of a beam web 123 connecting the front and rear beam flanges 121 and 122, the front and rear beam flanges 121 and 122 on both sides facing each other in parallel over a certain length,
A pair of beam reinforcements 14 are installed on the front beam flange 121 of the steel beam 12 symmetrically to the beam web 123 and joined by welding;
The beam reinforcement 14 is a vertical reinforcement 141 vertically welded to the front beam flange 121, and is integrated at a right angle to the vertical reinforcement 141, one end of which is welded to the beam web 123 side. Consists of a reinforcing plate 142,
A front arc-shaped reinforcing plate 16 having a predetermined radius R from the center of the steel beam 12 is installed on the front beam flange 121,
Thumb piles for column-type pile walls, characterized in that a rear arc-shaped reinforcing plate 18 having the same radius (R) is installed on the rear beam flange 122 . delete delete The method of claim 1,
Thumb piles for column-type pile walls, characterized in that the front arc-shaped reinforcing plate 16 and the rear arc-shaped reinforcing plate 18 are further provided with spiral protrusions (161, 181), respectively, to reduce friction during drawing with the casing. (a) designating the rear surface and the excavation surface as the center of the reference line (CL), and performing the casing 100 perforation at regular intervals on the rear surface centering on the reference line (CL);
(b) inserting the thumb pile 10 for a column-type pile wall according to claim 1 into the drilling hole 102 formed by the casing 100 perforation, and then performing a pounding;
(c) removing the casing 100 after injecting cement paste or mortar into the drilling hole 102;
(d) performing multi-axis auger excavation between the adjacent column-type pile wall thumb piles (10 and 10) to form an SCW wall construction space (5);
(e) forming the SCW wall 11 by injecting cement milk, bentonite, and hardening material into the SCW wall construction space 5 and mixing and stirring the original ground soil and soil during drawing of the multi-axis auger; A method of constructing a continuous retaining wall using thumb piles for column-type pile walls.

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