KR102610495B1 - Construction method of self-supporting retaining wall - Google Patents

Abstract

The present invention relates to a method of constructing a self-supporting retaining wall with cut sections.
According to the present invention, the strength of the upper part is reinforced by installing anchor fixtures with a simplified structure on the sides and rear of the upper part of the fixed pile constructed on the original ground of the cut section, and the upper strength of the permanent anchor constructed on the original ground immediately behind the fixed pile is improved. The tensile force is maintained to withstand the necessary reinforcing force of the permanent anchor. In addition, the intermediate reinforcing member is horizontally connected and installed between the auxiliary piles constructed on the back ground between the fixed piles and the single strip installed in front of the fixed piles to secure the fixed piles. As the earth pressure moment and shear force displacement acting on are suppressed, the installation interval of fixed piles constructed on the original ground can be widened, which has the effect of shortening the work period and reducing material demand.

Description

{Construction method of self-supporting retaining wall}

The present invention relates to a method of constructing a self-supporting retaining wall in a cut section. In particular, an anchor anchor with a simplified structure is installed on the upper part of a fixed pile constructed in the original ground to improve the tensile force of the permanent anchor so that it can withstand the necessary reinforcing force of the anchor. In addition, intermediate reinforcement members are horizontally connected and installed between the auxiliary piles constructed on the rear original ground between the rear of the fixed pile and the single strip installed on the front of the fixed pile to suppress the earth pressure, moment, and shear force displacement acting on the fixed pile, and construction is performed on the original ground. It is designed to widen the installation interval of fixed files.

In general, retaining wall blocks are the most common structures that resist earth pressure, and are used for optimal use of land due to site limitations such as roads, railways, ports, seawalls, abutments, redevelopment apartments, etc., and are often seen around roads. It is installed on slopes such as residential sites and the foot of mountains that form the border, and has the function of preventing collapse due to natural conditions such as earth pressure and rainwater.

In the case of recent retaining wall blocks, there was a construction method of installing a form equal to the installation height, then placing reinforcing bars on the inside, and pouring concrete. However, recently, various prefabricated retaining wall construction methods using retaining wall blocks manufactured in advance with concrete in unit sizes have been developed. It is becoming.

Prior art regarding the construction method of such a retaining wall block is provided by Registered Patent No. 10-2220613 and Registered Patent No. 10-1628049.

This prior art self-supporting retaining wall construction method involves burying a plurality of steel pipes in the ground at regular intervals and installing them so that they touch the ground. In the self-supporting retaining wall construction method, a circular metal pipe is placed on the ground (GL) where the foundation excavation is made. A steel pipe pile installation step of installing a plurality of steel pipe piles at regular intervals, and forming the portion of the steel pipe pile inserted into the ground deeper than the portion exposed to the ground; A basic concrete forming step of forming basic concrete having insertion holes penetrating the interior at regular intervals on the upper surface; A seismic isolation basic concrete forming step of forming seismic isolation basic concrete by installing a seismic isolation rubber plate on which a steel pipe insertion hole is formed at the same position as the insertion hole of the basic concrete; The rear width is longer than the front width, and it has wedge-shaped slopes on both sides. It has a semicircular coupling groove on one slope and a semicircular coupling protrusion that protrudes outward on the other slope, and an internal penetrating groove in the center of the upper surface. A block forming step of forming a steel pipe insertion hole and forming a block having a pin insertion hole into which a fixing pin is inserted into the outer peripheral surface of the steel pipe insertion hole; A block is inserted into a steel pipe pile driven into the ground with the narrow front facing forward and installed on a seismic isolation rubber plate, and the insertion groove of another block with the long back facing forward is joined to the connecting protrusion of the block to create a steel pipe pile. Blocks that are connected to and blocks that are not connected to the steel pipe pile are repeatedly connected to each other to form a single structure. These are stacked to form a retaining wall in which the blocks are installed under their own weight, and concrete is poured into the inner space of the steel pipe pile to strengthen the retaining wall. Support block installation step; It is characterized in that it consists of a backfilling step of backfilling and compaction at the rear of the retaining wall.

delete

This prior art connects blocks installed under their own weight into a single structure, thereby eliminating twisting or overloading, preventing blocks from moving away, and not using grids, which not only reduces construction costs but also shortens the construction period. By increasing the bearing capacity of the block with steel pipe piles, it prevents the structure from tipping over in the event of a slope collapse, and when seismic design is required, seismic isolation rubber plates are installed on the foundation concrete to absorb the shock of up, down, left, and right shaking during an earthquake, thereby securing a more stable retaining wall. There is an effect.

However, this prior art not only fails to maintain sufficient pressure as it must withstand the earth pressure applied in the vertical direction by burying a large number of steel pipe piles in the ground, but also has structural vulnerabilities that make it vulnerable to pressure generated horizontally. , in order to solve this problem, the gap between steel pipe piles buried underground must be narrowed.

In addition, the prior art method of constructing a self-supporting retaining wall structure is a method of constructing a retaining wall structure by constructing a support block on an embankment slope or a cut slope, which includes a fixed block having two or more insertion holes penetrating up and down, and the fixed block. Constructing the blocks by alternately arranging them between the blocks; When inserting and fixing a fixed beam into the ground after passing it through the insertion hole of the fixed block, inserting the fitting wing formed on the fixed beam to fit into the wing receiving groove formed on the fixed block; and pouring concrete or mortar into the insertion hole formed in the fixing block, wherein the construction step includes forming two or more insertion holes in the fixing block and two adjacent insertion holes formed in the fixing block. It is characterized in that it is constructed so that the distance between the insertion hole formed in the fixing block and the insertion hole formed in another fixing block adjacent to the insertion block is maintained constant.

This prior art improves the bearing capacity of the block itself, which can support the pressure applied from the slope, by constructing the fixing block and the fitting block to be mutually engaged, and also improves the spacing of the fixing beam that is inserted and fixed into the ground through the fixing block. By keeping it constant using fitting blocks, it not only ensures a constant bearing capacity at any point in the longitudinal direction of the retaining wall, but also solves the problem of over-reinforcement that may occur due to uneven spacing of fixed beams.

However, this prior art is configured to resist the pressure applied from the slope simply by being coupled to an adjacent fixed block without directly installing support means such as fixed beams and fixed anchors, so that it can be installed vertically and horizontally on the retaining wall structure. It has the problem of being vulnerable to applied earth pressure.

Registered Patent No. 10-2220613 (2021.02.22.) Registered Patent No. 10-1628049 (2016.06.01.)

The present invention was devised to solve such conventional problems. The purpose of the present invention is to improve the tensile force of the permanent anchor by installing an anchor anchor with a simplified structure on the upper part of the fixed pile constructed in the original ground, thereby providing the necessary security for the anchor. It is designed to withstand strong forces, and an intermediate reinforcement member is horizontally connected and installed between the auxiliary pile constructed on the rear base between the rear of the fixed pile and the single strip installed on the front of the fixed pile to reduce the earth pressure, moment, and shear force acting on the fixed pile. The purpose is to provide a method of constructing a self-supporting retaining wall with cut sections configured to suppress displacement and widen the installation interval of fixed piles constructed on the original ground.

A means of solving the problem to achieve this goal includes the steps of drilling a pile hole in the original ground by maintaining a gap on the left and right, and then constructing a fixed pile inside the pile hole to hide it; After excavating the original ground at the rear of the fixed pile and installing anchor anchors on the side and rear of the upper part of the fixed pile, drilling an anchor installation hole in the excavation space, and constructing a permanent anchor in the anchor installation hole and anchor anchorage; ; An auxiliary pile hole is drilled in the digging space in the rear area between the left and right sides of the fixed pile, the lower part of the auxiliary pile to which the intermediate reinforcement anchor is fixed is inserted in the front of the auxiliary pile hole, and then concrete is poured into the auxiliary pile hole to create an auxiliary pile. A construction step; first cutting the front surface of the original ground to expose the fixed piles to the outside, and installing an earthen plate between the exposed fixed piles; Installing a single strip on the front of the fixed pile, then installing and tensioning the intermediate reinforcement between the single strip and the intermediate reinforcement anchoring port on the front of the auxiliary pile; It is characterized in that it consists of the steps of pulling the permanent anchor installed in the anchor installation hole and the anchor fixing hole upward, then cutting the front surface of the original ground twice to expose the fixed pile to the outside, and installing an earthen plate between the fixed piles.

delete

According to the present invention, the strength of the upper part is reinforced by installing anchor fixtures with a simplified structure on the sides and rear of the upper part of the fixed pile constructed on the original ground of the cut section, and the upper strength of the permanent anchor constructed on the original ground immediately behind the fixed pile is improved. The tensile force is maintained to withstand the necessary reinforcing force of the permanent anchor. In addition, the intermediate reinforcing member is horizontally connected and installed between the auxiliary piles constructed on the back ground between the fixed piles and the single strip installed in front of the fixed piles to secure the fixed piles. As the earth pressure moment and shear force displacement acting on are suppressed, the installation interval of fixed piles constructed on the original ground can be widened, which has the effect of shortening the work period and reducing material demand.

Figure 1 is a process diagram showing a cut-out self-supporting retaining wall construction method according to the present invention.
Figure 2 is a configuration diagram showing a method of constructing a self-supporting retaining wall in a cut section according to the present invention, where a is a state diagram in which fixed piles are concealedly constructed in the original ground, and b and c are a diagram showing the original ground on the back of the fixed piles being excavated and fixed. This is the state diagram in which the anchor was constructed, d and e are the state diagrams in which the auxiliary pile with the intermediate reinforcement fixed to the trench surface was constructed, f and g are the state diagrams in which the earth plate was installed after first cutting the original ground, and h and i are the intermediate piles. This is a state diagram in which the reinforcement is tensioned to the front, and j is a state diagram in which the permanent anchor is tensioned upward after the original ground is cut secondarily.
Figure 3 is a configuration diagram showing another embodiment of the cut section self-supporting retaining wall construction method according to the present invention. This is a diagram showing the state in which the original ground was excavated and the front and rear fixing anchors were constructed. b is a diagram showing the state in which the front and rear auxiliary piles with the intermediate reinforcement fixed to the excavation surface were constructed, and c is the state in which the earth plate is installed after the original ground is first cut. This is a state diagram, where d is a state diagram in which the intermediate reinforcement is connected to the intermediate reinforcement of the front and rear auxiliary piles and tensioned to the front and rear, and e is a state diagram in which the original ground is cut twice and the front and rear permanent anchors are tensioned upward. This is a state diagram, and f is a configuration diagram showing another example of front and rear auxiliary pile construction and intermediate reinforcement member connection installation.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the attached drawings.

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

The attached Figure 1 is a process diagram showing the cut-out self-supporting retaining wall construction method according to the present invention.
As shown, the cut-out self-supporting retaining wall construction method according to the present invention involves leveling the original ground and drilling a pile hole by maintaining appropriate spacing on the left and right, and then concealing a fixed pile made of an H beam inside the pile hole. Construction steps; After excavating the original ground behind the fixed pile, installing anchor anchors on the side and rear of the upper part of the fixed pile, drilling an anchor installation hole in the excavation space, and constructing a permanent anchor in the anchor installation hole and anchor anchorage hole; ; Drill an auxiliary pile hole in the digging space in the rear area between the left and right sides of the fixed pile, insert the lower part of the auxiliary pile made of an H beam with an intermediate reinforcement anchor fixed to the front of the auxiliary pile hole, and then pour concrete into the auxiliary pile hole. A step of constructing auxiliary piles; Exposing the fixed piles to the outside by cutting the entire surface of the original ground, and installing an earthen plate between the exposed fixed piles; Installing a single strip on the front of the fixed pile, then installing and tensioning the intermediate reinforcement between the single strip and the intermediate reinforcement anchoring port on the front of the auxiliary pile; It consists of the steps of pulling the permanent anchor installed in the anchor installation hole and the anchor fixture upward, cutting the entire surface of the original ground to expose the fixed pile to the outside, and installing an earthen plate between the fixed piles.

The step of installing the anchor fixture and constructing the permanent anchor involves securing space by excavating the original ground at the rear of the fixed pile, then installing internal reinforcement plates on the left and right sides of the upper part of the fixed pile, and moving them to the left and right sides of the upper rear of the fixed pile. An anchor anchor installation step of installing an angle pedestal with a bump and installing an acupressure plate on the upper part of the anti-movement angular pedestal, drilling an anchor installation hole in the trench space at the rear of the fixed pile, and inserting the lower part of the permanent anchor into the anchor installation hole. Next, a permanent anchor construction step is performed in which grout is injected into the anchor installation hole to fix the permanent anchor, and the grout hose and strand of the permanent anchor are fixed to the tension block fastened to the upper part of the acupressure plate.

The intermediate reinforcement installation and tensioning step includes installing a short strip on the front of the fixed pile and forming an assembly hole to face it, and horizontally drilling the front of the cut original ground to check the intermediate reinforcement anchorage on the front of the auxiliary pile. It consists of connecting the intermediate reinforcement to the intermediate reinforcement anchorage on the front of the auxiliary pile through the assembly hole of the short strip and drilling the original ground, and then tensioning the intermediate reinforcement to the front.

The cut-section self-supporting retaining wall construction constructed in this manner will be briefly described with reference to the attached drawings.

As shown in Figure 2a, after leveling the original ground using heavy equipment such as an excavator, a plurality of pile holes (1a) are drilled by maintaining appropriate intervals on the left and right, and then a plurality of H-beams are formed inside the pile holes (1a). The fixed pile (2) is constructed in a concealed manner.

Next, as shown in Figure 2b, excavation is performed on the original ground at the rear of the fixed pile (2) to secure space, and anchor anchors (30) are installed on the sides and rear of the upper part of the fixed pile (2), and then excavated. After drilling a plurality of anchor installation holes (3a) in the space and inserting the lower part of the permanent anchor (4) through the anchor installation holes (3a), grout is injected into the anchor installation holes (3a) to install the permanent anchor (4). ) is fixed, and the tension block (9) is fastened to the upper part of the acupressure plate (33) of the anchor fixture (30) to fix the strand (8) of the permanent anchor (4).

At this time, the permanent anchor (4) includes a plurality of expansion sliders (5) connected to be expandable outward when stretched, as shown in Figure 2c; An upper cap (6) and a lower fixture (7) fixed in communication with the upper and lower parts of the expansion slider (5); A plurality of strands (8) that pass through the upper cap (6) and whose lower ends are fixed to the lower fixture (7); It is made up of a tension block (9) that is fastened to the top of the anchor fixture (30) fixed to the top of the fixed pile (2) and secures the upper part of the strand (8), and passes through the tension block (9) and the upper cap (6). The grout hose (10) is inserted inside the expansion slider (5) to fill the inside of the expansion slider (5) with grout.

The anchor fixture 30 includes an internal reinforcing plate 31 that is vertically inserted and fixed to the left and right sides of the upper part of the fixed pile 2; An angle pedestal (32) fixed vertically at a distance between the upper rear left and right sides of the fixed pile (2) and having a movement prevention bump (32a); It consists of an acupressure plate 33 having a through hole 33a fixed to the upper part of the angle pedestal 32 to prevent separation by the movement barrier 32a (see Figure 2b).

In this state, as shown in Figure 2d, a number of auxiliary pile holes (13) are drilled in the rear area digging space between the left and right sides of the fixed pile (2), and the intermediate reinforcement anchorage (24) is made of an H beam fixed to the front. The auxiliary pile (14) is inserted into the auxiliary pile hole (13), and then concrete is poured inside the auxiliary pile hole (13) to construct the auxiliary pile (14).

At this time, as shown in Figure 2e, the intermediate reinforcement anchorage 24 is vertically finished between the inclined plates 21a and 21b fixed inwardly at both ends of the front of the auxiliary pile 14, and the inclined plates 21a and 21b. It consists of a vertical finishing plate 22 and a vertical groove 23 formed in the central area of the vertical finishing plate 22.

Next, as shown in Figure 2f, the front surface of the original ground is first cut to expose the fixed piles (2) to the outside, and an earthen plate (11) is installed between the exposed fixed piles (2) to create a gap between the fixed piles (3). is finished (see Figure 2g).

In this state, as shown in FIGS. 2h and 2i, a short strip 12 is installed on the front of the fixed pile 2, and then between the short strip 12 and the intermediate reinforcement anchorage 24 on the front of the auxiliary pile 14. The horizontal strength is reinforced by fastening and fixing the intermediate reinforcement (28).

That is, a single strip 12 is installed on the front of the fixed pile 2, an assembly through hole 15a is formed through the single strip 12, and an intermediate reinforcement anchor 24 is fixed to the front of the auxiliary pile 14. In order to check, a horizontal long hole (24a) is drilled horizontally on the front of the cut original ground, and then the intermediate reinforcement anchorage (24) is formed through the assembly hole (15a) of the short strip (12) and the horizontal long hole (24a) of the original ground. Insert the inside of the fastening bolt (25) of the intermediate reinforcement (28) into the vertical groove (23) formed in the central area of the vertical finishing plate (22), tightly attach the fixing nut (26) fastened to the inside, and then tighten the fastening bolt. The tightening force of the tightening nut (27) fastened to the outside of (25) is generated to generate a tensile force toward the front.

In this state, as shown in Figure 2j, the strand (8) inserted into the tension block (9) fastened and fixed to the upper part of the acupressure plate (33) is stretched upward using a tensioner (not shown) to extend the extension slider (5) to the outside. By expanding it to improve the reinforcing power, the front of the original ground is cut secondarily to expose the fixed piles (2) to the outside, and when the earth plate (11) is installed between the exposed fixed piles (2), one row of cut parts Construction of the retaining wall is completed (see Figure 2g).

In this constructed state, it can be used as a temporary guard, and a formwork can be installed in front of the fixed pile (2) and concrete can be poured to use it as a wall.

Meanwhile, the content shown in Figures 3a to 3f is another embodiment of the cut-out self-supporting retaining wall construction method shown in Figures 1 and 2 (a to j), and the construction method for this is to smooth the original ground and build the left and right sides. And drilling a pile hole while maintaining the gap at the front and back, and then constructing front and rear piles made of H beams inside the pile hole in a concealed manner; After excavating the original ground on the back and front of the front and rear piles, installing anchor anchors on the sides, rear, and front of the upper front and rear piles, drilling anchor installation holes in the excavation space, and drilling anchor installation holes and anchor fixing holes. A step of constructing front and rear permanent anchors in between; An auxiliary pile hole is drilled in the trench space in the rear and front areas between the left and right sides of the front and rear piles, and the lower part of the front and rear auxiliary piles, which are made of H beams with intermediate reinforcement anchors fixed to the front and rear, are inserted into the auxiliary pile holes. Next, pouring concrete into the auxiliary pile hole to construct front and rear auxiliary piles; Cutting the back and front of the original ground to expose the front and rear piles to the outside, and installing an earthen plate between the exposed front and rear piles; Steps of installing front and rear short strips horizontally on the front and rear of the front and rear piles, and connecting and tensioning the intermediate reinforcement between the front and rear short strips and the intermediate reinforcement anchors on the front and rear of the front and rear auxiliary piles. ; This is the step of pulling the front and rear permanent anchors installed in the anchor installation hole and anchor fixture upward, cutting the front and back of the original ground to expose the front and rear piles to the outside, and installing an earthen plate between the front and rear piles. It comes true.

The step of installing the anchor anchor and constructing the front and rear permanent anchors involves securing space by excavating the original ground at the back and front of the front and rear piles, and then installing internal reinforcing plates on the left and right sides of the upper front and rear piles. , An angle pedestal with a movement prevention bump is installed on the left and right sides of the front and rear tops of the front and rear piles, an anchor anchorage installation step of installing an acupressure plate on the top of the movement prevention angle pedestal, and an anchor anchorage installation step in the excavation space at the rear and front of the front and rear piles. Drill an anchor installation hole, insert the lower parts of the front and rear permanent anchors into the anchor installation hole, then inject grout into the anchor installation hole to fix the front and rear permanent anchors, and secure the tension plate to the upper part of the acupressure plate. It consists of a permanent anchor construction stage in which the grout hoses and strands of the front and rear permanent anchors are fixed to the block.

The intermediate reinforcement installation and tensioning step includes installing front and rear end strips on the front and back of the front and rear piles and forming assembly through holes in opposition, and checking the intermediate reinforcement anchorages on the front and rear of the front and rear auxiliary piles. For this purpose, the intermediate reinforcement is connected to the intermediate reinforcement anchorage at the front and rear of the front and rear auxiliary piles through the steps of horizontally drilling the front and rear of the cut original ground, and through the assembly hole of the short strip and drilling of the original ground, and then connecting the intermediate reinforcement to the front and rear. It consists of the step of tensioning the intermediate reinforcement.

delete

In the front and rear auxiliary pile construction and intermediate reinforcement connection installation and tensioning steps, a central pile hole is drilled in the excavation space in the rear and front center areas between the left and right sides of the front and rear piles, and the intermediate reinforcement anchorage is installed in the central pile hole at the front and rear. A step of constructing a central auxiliary pile by inserting the lower part of the central auxiliary pile made of an H beam fixed to the are installed, forming assembly through holes in opposition, drilling horizontally through the front and back of the cut original ground to check the intermediate reinforcement anchorage at the front and rear of the central auxiliary pile, and then through the assembly through holes of the single wale and drilling into the original ground. This consists of connecting the intermediate reinforcement to the intermediate reinforcement anchorage at the front and rear of the central auxiliary pile, and then tensioning the intermediate reinforcement to the front and rear.

The cut-section self-supporting retaining wall construction method constructed in this way is another embodiment of the cut-section self-supporting retaining wall construction method shown in FIGS. 1 and 2 (a to j), and the same drawings, names, and symbols are used jointly. Let's use it to explain.

As shown in Figure 3a, the original ground is flattened using heavy equipment such as an excavator, then a plurality of pile holes (1a) are drilled while maintaining the distance between the left and right sides and the front and rear sides, and then an H-beam is formed inside the pile holes (1a). Multiple front and rear piles (2a) (2b) are constructed concealed.

At this time, the front and rear permanent anchors (4a) (4b) include a plurality of expansion sliders (5) connected to be able to expand outward when tensioned; An upper cap (6) and a lower fixture (7) fixed in communication with the upper and lower parts of the expansion slider (5); A plurality of strands (8) that pass through the upper cap (6) and whose lower ends are fixed to the lower fixture (7); It consists of a tension block (9) fastened to the upper part of the anchor fixture (30) fixed to the upper part of the fixed pile (2) to secure the upper part of the strand (8) (see Figure 5c).

At this time, the front and rear permanent anchors (4a) (4b) include a plurality of expansion sliders (5) connected to be able to expand outward when tensioned; An upper cap (6) and a lower fixture (7) fixed in communication with the upper and lower parts of the expansion slider (5); A plurality of strands (8) that pass through the upper cap (6) and whose lower ends are fixed to the lower fixture (7); It consists of a tension block (9) fastened to the upper part of the anchor fixture (30) fixed to the upper part of the fixed pile (2) to secure the upper part of the strand (8) (see Figure 2c).

In this state, the tension block (9) is fastened and fixed to the pressure plate (33) of the anchor fixture (30), and then the strand (8) and the grout are passed through the through hole (33a) of the pressure plate (33) and through the tension block (9). The hose 10 is inserted upward (see Figure 5b).

In this state, the tension block (9) is fastened and fixed to the pressure plate (33) of the anchor fixture (30), and then the strand (8) and the grout are passed through the through hole (33a) of the pressure plate (33) and through the tension block (9). The hose 10 is inserted upward (see Figure 2b).

Next, as shown in Figure 3b, a number of auxiliary pile holes (13) are drilled in the digging space in the rear and front areas between the left and right sides of the front and rear piles (2a) (2b), and the intermediate reinforcement anchorage (24) is installed on the front and rear sides. ) is inserted into the front and rear auxiliary piles (14a) (14b) made of fixed H beams into the auxiliary pile hole (13a), and then concrete is poured into the auxiliary pile hole (13) to create the front and rear auxiliary piles ( 14a)(14b) are fixed.

At this time, the intermediate reinforcement anchorage 24 includes inclined plates 21a and 21b fixed inwardly at both front ends of the front and rear auxiliary piles 14a and 14b; A vertical finishing plate (22) positioned vertically between the inclined plates (21a) (21b); It consists of a vertical groove 23 formed in the central area of the vertical finishing plate 22 (see Figure 2e).

In this state, as shown in Figure 3c, the front and rear sides of the original ground are first cut to expose the front and rear piles (2a) (2b) to the outside, and an earthen plate is placed between the exposed front and rear piles (2a) (2b). (11) is installed to close the space between the front and rear piles (2a) and (2b) (see Figure 2g).

Next, as shown in Figure 3d, install the front and rear end strips (12a) (12b) on the front and rear of the front and rear piles (2a) (2b), and then install the front and rear end strips (12a) (12b). ) and the intermediate reinforcement anchorage 24 on the front and rear of the front and rear auxiliary piles 14a and 14b, the intermediate reinforcement 28 is fastened and fixed to enhance strength.

That is, the front and rear end strips (12a) (12b) are installed on the front and rear of the front and rear piles (2a) (2b), and the assembly holes (15a) are installed in the front and rear end strips (12a) (12b). In order to penetrate and confirm the intermediate reinforcement anchorage 24 fixed to the front and rear of the front and rear auxiliary piles 14a and 14b, a horizontal long hole 24a is drilled horizontally through the front and rear of the cut ground. , a vertical groove (23) formed in the central area of the vertical finishing plate (22) of the intermediate reinforcement anchorage (24) through the assembly hole (15a) of the front and rear end strips (12a) (12b) and the horizontal long hole (24a) of the original ground. Insert the inside of the fastening bolt (25) of the intermediate stiffener (28) into close contact with the fixing nut (26) fastened on the inside, and then apply the tightening force of the tightening nut (27) fastened to the outside of the fastening bolt (25). This generates a tensile force to the front (see Figure 2i).

In this state, as shown in Figure 3e, the strand (8) inserted into the tension block (9) fastened to the upper part of the acupressure plate (33) is stretched upward as a tensioner to expand the expansion slider (5) outward. To improve strength, the front and rear piles (2a) (2b) are exposed to the outside by cutting the front and rear sides of the original ground, and an earth plate (11) is installed between the exposed front and rear piles (2a) (2b). Once installed, the construction of the two-row retaining wall in the cut section is completed (see Figure 2g).

Meanwhile, as shown in Figure 6f, when explaining the construction status of another embodiment of the front and rear auxiliary pile construction and intermediate reinforcement connection installation steps, on the embankment surface in the rear central area between the left and right sides of the front and rear piles (2a) (2b) After drilling the central pile hole (41a) and inserting the lower part of the central auxiliary pile (40) to which the intermediate reinforcement anchor (24) is fixed into the central pile hole (41a), concrete is poured into the central pile hole (41a). After constructing the central auxiliary pile (40), install the front and rear end strips (12a) (12b) horizontally on the front and rear of the front and rear piles (2a) (2b), and install the assembly hole (15a) in opposition. In order to check the intermediate reinforcement anchorage 24 at the front and rear of the central auxiliary pile 40, a horizontal long hole 24a is drilled horizontally on the front and rear sides of the cut original ground, and then a single wale assembly hole 15a is formed. The intermediate reinforcement (28) is connected to the intermediate reinforcement anchorage (24) of the central auxiliary pile (40) through the horizontal long hole (24a), and then the intermediate reinforcement (28) is stretched to the front and rear to reinforce the horizontal strength. .

Meanwhile, as shown in Figure 3f, when explaining the construction status of another embodiment of the front and rear auxiliary pile construction and intermediate reinforcement connection installation steps, on the embankment surface in the rear central area between the left and right sides of the front and rear piles (2a) (2b) After drilling the central pile hole (41a) and inserting the lower part of the central auxiliary pile (40) to which the intermediate reinforcement anchor (24) is fixed into the central pile hole (41a), concrete is poured into the central pile hole (41a). After constructing the central auxiliary pile (40), install the front and rear end strips (12a) (12b) horizontally on the front and rear of the front and rear piles (2a) (2b), and install the assembly through holes (15a) facing each other. In order to check the intermediate reinforcement anchorage 24 at the front and rear of the central auxiliary pile 40, a horizontal long hole 24a is drilled horizontally on the front and rear sides of the cut original ground, and then a single wale assembly hole 15a is formed. The intermediate reinforcement (28) is connected to the intermediate reinforcement anchorage (24) of the central auxiliary pile (40) through the horizontal long hole (24a), and then the intermediate reinforcement (28) is stretched to the front and rear to reinforce the horizontal strength. .

The method of constructing a cut-out self-supporting retaining wall according to the present invention described above is not limited to the above-described embodiment, and can be used by those skilled in the art in the field to which the present invention pertains without departing from the gist of the present invention claimed in the following claims. Anyone who grows up will tell you that the technical idea is to the extent that various changes can be implemented.

Claims (17)

Drilling a pile hole in the original ground by maintaining a gap to the left and right, and then constructing a fixed pile inside the pile hole to hide it;
After excavating the original ground at the rear of the fixed pile and installing anchor anchors on the side and rear of the upper part of the fixed pile, drilling an anchor installation hole in the excavation space, and constructing a permanent anchor in the anchor installation hole and anchor anchorage; ;
An auxiliary pile hole is drilled in the digging space in the rear area between the left and right sides of the fixed pile, the lower part of the auxiliary pile to which the intermediate reinforcement anchor is fixed is inserted in the front of the auxiliary pile hole, and then concrete is poured into the auxiliary pile hole to create an auxiliary pile. A construction step;
first cutting the front surface of the original ground to expose the fixed piles to the outside, and installing an earthen plate between the exposed fixed piles;
Installing a single strip on the front of the fixed pile, then installing and tensioning the intermediate reinforcement between the single strip and the intermediate reinforcement anchoring port on the front of the auxiliary pile;
Cutting, characterized in that it consists of the step of pulling the permanent anchor installed in the anchor installation hole and the anchor fixing hole upward, then cutting the front surface of the original ground twice to expose the fixed pile to the outside, and installing an earthen plate between the fixed piles. Construction method of a partially self-supporting retaining wall. The method of claim 1, wherein the anchor anchor installation and permanent anchor construction steps include:
After excavating the original ground at the rear of the fixed pile to secure space, internal reinforcing plates are installed on the left and right sides of the upper part of the fixed pile, and an angle pedestal with a movement prevention bump is installed on the left and right sides of the rear upper part of the fixed pile, and an angle to prevent movement is installed. An anchor anchor installation step of installing an acupressure plate on the upper part of the pedestal;
Drill an anchor installation hole in the digging space at the rear of the fixed pile, insert the lower part of the permanent anchor into the anchor installation hole, then inject grout into the anchor installation hole to fix the permanent anchor, and fasten it to the upper part of the pressure plate. A cut-out self-supporting retaining wall construction method, characterized in that it consists of a permanent anchor construction step of fixing the grout hose and strand of the permanent anchor to the fixed tensile block. The method of claim 1, wherein the intermediate reinforcement installation and tensioning steps include:
Installing a single strip on the front of the fixed pile and forming an assembly hole to face it;
A step of horizontally drilling the front of the cut original ground to check the intermediate reinforcement anchorage on the front of the auxiliary pile;
A cut-section self-supporting retaining wall construction method comprising the steps of connecting the intermediate reinforcement to the intermediate reinforcement anchorage on the front of the auxiliary pile through the assembly hole of the short strip and the drilling of the original ground, and then tensioning the intermediate reinforcement to the front. According to paragraph 1,
Drilling a pile hole in the original ground by maintaining a gap on the left and right and at the front and rear, and then constructing the front and rear piles inside the pile hole in a concealed manner;
After excavating the original ground on the back and front of the front and rear piles, installing anchor anchors on the sides, rear, and front of the upper front and rear piles, drilling anchor installation holes in the excavation space, installing anchor installation holes and anchors A step of constructing front and rear permanent anchors between anchorages;
An auxiliary pile hole is drilled in the excavation space in the rear and front areas between the left and right sides of the front and rear piles, the lower parts of the front and rear auxiliary piles with intermediate reinforcement anchors fixed to the front and rear of the auxiliary pile hole are inserted, and then the auxiliary pile holes are inserted. Constructing front and rear auxiliary piles by pouring concrete into the ball;
Cutting the back and front of the original ground to expose the front and rear piles to the outside, and installing an earthen plate between the exposed front and rear piles;
Installing front and rear short strips horizontally on the front and rear of the front and rear piles, and connecting and tensioning the intermediate reinforcement between the front and rear short strips and the intermediate reinforcement anchors at the front and rear of the front and rear auxiliary piles. and;
Tensing the front and rear permanent anchors installed in the anchor installation hole and the anchor fixture upward, cutting the front and rear of the original ground to expose the front and rear piles to the outside, and installing an earth plate between the front and rear piles. A cut-out self-supporting retaining wall construction method characterized by consisting of. The method of claim 4, wherein the anchor anchor installation and front and rear permanent anchor construction steps are
After securing space by excavating the original ground at the back and front of the front and rear piles, internal reinforcing plates are installed on the left and right sides of the upper front and rear piles, and movement barriers are installed on the left and right sides of the front and rear upper front and front piles. An anchor anchor installation step of installing an angle pedestal and installing an acupressure plate on the upper part of the angular pedestal;
Drill anchor installation holes in the trench space at the back and front of the front and rear piles, insert the lower parts of the front and rear permanent anchors into the anchor installation holes, and then inject grout into the anchor installation holes to install the front and rear permanent anchors. A method of constructing a self-supporting retaining wall in a cut section, characterized in that it consists of a permanent anchor construction step of fixing the grout hoses and strands of the front and rear permanent anchors to the tension block fastened to the upper part of the acupressure plate. The method of claim 4, wherein the intermediate reinforcement installation and tensioning steps are
Installing front and rear end strips on the front and rear sides of the front and rear piles and forming assembly holes to face each other,
Horizontally drilling the front and rear sides of the cut original ground to check the intermediate reinforcement anchors on the front and rear sides of the front and rear auxiliary piles;
A self-supporting cut section characterized by connecting the intermediate reinforcement to the intermediate reinforcement anchorage at the front and rear of the front and rear auxiliary piles through the assembly hole of the single strip and the drilling of the original ground, and then tensioning the intermediate reinforcement to the front and rear. Retaining wall construction method. The method of claim 4, wherein the front and rear auxiliary pile construction, intermediate reinforcement connection installation, and tensioning steps are
A central pile hole is drilled in the excavation space in the rear and front center area between the left and right sides of the front and rear piles, the lower part of the central auxiliary pile with intermediate reinforcement anchors fixed to the front and rear is inserted into the central pile hole, and the central pile hole is inserted into the central pile hole. A step of constructing a central auxiliary pile by pouring concrete inside,
Front and rear end strips are installed horizontally on the front and rear sides of the front and rear piles, and assembly through holes are formed in opposition, and the front and rear sides of the original ground cut to check the intermediate reinforcement anchorage in front and rear of the central auxiliary piles. After drilling horizontally, the intermediate reinforcement is connected to the intermediate reinforcement anchorage at the front and rear of the central auxiliary pile through the assembly hole of the short strip and the drilling of the original ground, and then tensioning the intermediate reinforcement to the front and rear. Construction method of self-supporting retaining wall with cut section. The method of claim 1 or 4, wherein the intermediate reinforcement anchorage (24) is
Between the slant plates 21a and 21b, which are inclined inward and fixed to both front and rear ends of the auxiliary pile 14 or front and rear auxiliary piles 14a and 14b, and slant plates 21a and 21b. It consists of a vertical finishing plate (22) and a vertical groove (23) formed in the central area of the vertical finishing plate (22),
The intermediate reinforcement (28) is
A vertical finishing plate (22) that passes through the assembly hole (15a) of the single strip (12) or the front and rear single strips (12a) (12b) and the horizontal long hole (24a) of the original ground and constitutes the intermediate reinforcement anchorage (24). A fastening bolt (25) whose inner outer periphery is inserted into the vertical groove (23) of
A fixing nut (26) fastened to the inside of the fastening bolt (25) and in close contact with the inner surface of the vertical groove (23) of the vertical finishing plate (22),
It is fastened and fixed to the outside of the fastening bolt (25) as a tightening force, and is provided by the short strip (12) and the auxiliary pile (14) or the front and rear short strips (12a) (12b) and the front and rear auxiliary piles (14a) (14b). A method of constructing a self-supporting retaining wall in a cut section, characterized in that it consists of a tightening nut (27) to reinforce the horizontal strength between them. The method of claim 1 or 4, wherein the anchor anchorage (30) is
An internal reinforcement plate (31) vertically inserted and fixed to the left and right sides of the upper part of the fixed pile (2) or the front and rear piles (2a) (2b);
An angle pedestal (32) fixed vertically at a distance between the upper and rear left and right sides of the fixed pile (2) or the front and rear piles (2a) (2b), and having a movement barrier (32a);
A cut-out self-supporting retaining wall construction method, characterized in that it consists of an acupressure plate (33) having a through hole (33a) fixed to the upper part of the angle pedestal (32) to prevent separation by the movement barrier (32a). delete delete delete delete delete delete delete delete

Images