KR102484234B1 - Precast Self Retaining wall and its construction method - Google Patents

Abstract

The present invention relates to a retaining wall which facilitates construction by applying a precast self-supported retaining wall method. To this end, disclosed is a retaining wall, which comprises: a plurality of piles installed on the ground; a soil retention plate installed at the rear side of each pile; and a wall body panel made of precast concrete to be installed at the front side of each pile. In addition, disclosed in the present invention is a retaining wall construction method, which comprises: a wall body panel manufacturing step of manufacturing a wall body panel by using a precast self-supported retaining wall method; a punching step of forming a plurality of holes on the ground; a pile insertion step of inserting the piles into the holes; an excavation step of excavating the ground at the front side of the piles while installing the soil retention plate at the rear side of the piles after the pile insertion step; a wall body panel installation step of installing the wall body panel at the front side of the piles after the excavation step; and a concrete placing step of placing concrete between the soil retention plate and the wall body panel after the wall body panel installation step.

Description

Self-supporting retaining wall and its construction method {Precast Self Retaining wall and its construction method}

The present invention relates to a self-supporting retaining wall and a construction method thereof, and more particularly, to a retaining wall and a construction method thereof, which are easily constructed by using a precast concrete method and combined with temporary facilities during construction.

Patent Document 001 includes a panel body made of concrete through which a nail hole for coupling a soil nail is formed on one side; fitting grooves and fitting protrusions provided on the upper and lower portions of the panel body, respectively, and stacked in a mutual fitting manner; A reinforcement panel made of FRP material assembled to the front surface of the panel body; A strength-reinforced eco-friendly retaining wall panel including a reinforcing coating layer formed on the rear surface of the panel body is proposed.

Patent Document 002 consists of a plate-shaped bottom plate pre-manufactured in a precast type, and a wall part composed of a front wall and a plurality of buttresses integrally formed on the rear surface of the front wall, and the upper surface of the bottom plate body constituting the bottom plate has the front surface. A shear key groove is formed in which the wall is seated, and when assembling the retaining wall, the lower end of the front wall constituting the wall portion is inserted into and coupled to the shear key groove, and the ends of the main reinforcing bars provided inside the plurality of buttresses are protruded from the bottom of the buttress Head anchors are integrally connected to each other, and anchor holes are formed in a tapered shape so that the cross-sectional area increases from top to bottom through the bottom plate body at a position corresponding to the head anchor, respectively. In the assembly process at the construction site, after assembling the head anchor to be inserted into the anchor hole, mortar is filled in the space inside the anchor hole and hardened, thereby connecting the bottom plate and the wall to each other. A buttress-type precast retaining wall structure is presenting

Patent Document 003 is a concrete panel provided to extend vertically in front of a slope, a reinforcing member whose rear end is inserted into a perforated hole formed in the slope and whose front end is fixed to the concrete panel, and the lower part of the space between the slope and the concrete panel. It includes a concrete filling material filled in the concrete filling material and a soil filling material filled on the upper side of the concrete filling material, and a through hole through which the reinforcing material passes through is formed in the concrete panel, and the front end of the reinforcing material passes through the through hole of the concrete panel. In the cut-out panel-type retaining wall construction structure inserted and fixed so as to further include a protective tube coupled to surround the outside of the reinforcing material exposed to the front of the slope, the inside of the protective tube is filled with a filler, characterized in that A cut-out panel type retaining wall is proposed.

Patent Document 004 includes an embankment portion formed by filling and compacting soil; A panel unit forming a front surface of a retaining wall by stacking a plurality of panels; Suggested is an embankment retaining wall structure including a panel support for fixing and supporting the panel portion by connecting the embankment portion and the panel portion.

KR 10-2428476 B1 (registration date July 28, 2022) KR 10-2290220 B1 (registration date August 10, 2021) KR 10-2137563 B1 (registration date July 20, 2020) KR 10-2395328 B1 (registration date May 02, 2022)

An object of the present invention is to provide a self-supporting retaining wall that is easy to construct by applying a precast concrete method and has a more robust structure and a construction method thereof.

In order to solve the above problems, the self-supporting retaining wall according to an embodiment of the present invention includes a plurality of piles installed on the ground; Earth plate installed at the rear of each pile; and a wall panel made of precast concrete installed in front of each of the piles.

In the self-supporting retaining wall of the present invention, the pile is installed to extend vertically H-beams; Support plate coupled to the lower surface of the H-beam; a lower reinforcing rib formed to protrude downward from the lower surface of the supporting plate; and an upper reinforcing rib formed to connect the lower end of the H-beam and the upper surface of the support plate.

In the self-supporting retaining wall of the present invention, the lower reinforcing ribs include horizontal ribs and vertical ribs disposed mutually in a '+' shape, and the upper reinforcing ribs are flange reinforcing ribs installed to connect the flange of the H-beam and the support plate And a web reinforcing rib installed to connect the web of the H-beam and the support plate.

In the self-supporting retaining wall of the present invention, the wall panel is a 'c'-shaped first wall panel including a front portion and a flange portion protruding rearward from both ends of the front portion and the front portion of the first wall panel and parallel The '-' shaped second wall panels arranged in such a way are repeatedly installed and configured.

In the self-supporting retaining wall of the present invention, further comprising a connection portion connecting the pile and the wall panel, wherein the connection portion is installed to extend left and right on the front surface of the pile, one side flange is installed to contact the pile, and the other side flange C-beams installed so that they are in contact with the wall panel; and a form tie installed to connect the other flange of the C-beam and the wall panel.

In the self-supporting retaining wall of the present invention, a buried groove is formed on the front surface of the wall panel to accommodate the end of the form tie protruding through the wall panel, and the buried groove is filled with a buried portion covering the end of the form tie.

On the other hand, in order to solve the above problems, the self-supporting retaining wall construction method according to an embodiment of the present invention includes a wall panel manufacturing step of manufacturing a wall panel using a precast concrete method; A drilling step of forming a plurality of holes in the ground; A file insertion step of inserting a file into the hole; After the pile insertion step, an excavation step of installing an earth plate at the rear of the pile while digging the ground in front of the pile; After the excavation step, a wall panel installation step of installing the wall panel in front of the pile; and a concrete pouring step of pouring concrete between the soil plate and the wall panel after the wall panel installation step.

According to the present invention, by using the wall panel manufactured by the precast self-supporting concrete method for both temporary facilities, the installation of formwork at the construction site is minimized, and field work such as reinforcing bars and concrete casting is minimized to shorten the construction period, site safety and ease of construction It has the effect of constructing a retaining wall.

In addition, according to the present invention, since the pile can be firmly fixed to the ground, and the pile and the wall panel can be firmly fixed to each other, there is an effect of providing a retaining wall with a more robust structure. In addition, it is a construction method that can be applied on-site without the application of additional excavation or temporary facilities during construction.

1 is a front view of a retaining wall according to an embodiment of the present invention;
2 is a cross-sectional side view of a retaining wall according to an embodiment of the present invention.
3 is a plan view of a retaining wall according to an embodiment of the present invention.
Figure 4 is a perspective view, a plan view and a bottom view of a pile in a retaining wall according to an embodiment of the present invention.
5 is a flowchart of a retaining wall construction method according to an embodiment of the present invention.
Figure 6 is a flow chart for the pile manufacturing step in the retaining wall construction method according to an embodiment of the present invention.
Figure 7 is a flow chart for the wall panel manufacturing step in the retaining wall construction method according to an embodiment of the present invention.
8 is a flow chart for the pile manufacturing step in the retaining wall construction method according to an embodiment of the present invention.

Hereinafter, the most preferred embodiment of the present invention will be described in detail in order to explain the present invention in detail to the extent that those skilled in the art can easily practice the present invention.

Numbers cited in the examples below are not limited to the referenced subject and can be applied to all examples. An object that exhibits the same purpose and effect as the configuration presented in the embodiment corresponds to an equivalent replacement object. The high-level concept presented in the examples includes sub-concept objects that are not described.

[Example 1-1] The self-supporting retaining wall of the present invention includes a plurality of piles 100 installed in the ground; Earth plate 200 installed at the rear of each pile 100; and a wall panel 300 made of precast concrete installed in front of each of the piles 100. Each of the piles 100 is arranged to be spaced apart from each other, and each lower end is installed so that the ground is driven vertically. The soil plate 200 is formed in a rectangular plate shape, and is provided with a plurality to block the space between the respective piles 100.

[Example 1-2] The self-supporting retaining wall of the present invention, in Example 1-1, includes a reinforcing part 500 connecting the pile 100 and the earth plate 200. The reinforcing part 500 is installed in contact with the rear surface of the pile 100 to support the ends of the two soil plates 200 adjacent to each other.

[Example 1-3] In the self-supporting retaining wall of the present invention, in Example 1-1, a drainage channel 330 is formed in the wall panel 300. The drainage passage 330 is formed to pass through the wall panel 300 in front and back. The drain 330 may be formed in plurality along the left and right lengthwise and heightwise directions of the wall panel 300 . The drain 330 may be formed by inserting a pipe made of PVC (Polyvinyl Chloride) into the wall panel 300 when the wall panel 300 is manufactured using a precast concrete method.

[Example 2-1] In the self-supporting retaining wall of the present invention, in Example 1-1, the pile 100 includes H-beams 110 installed to extend vertically; Support plate 120 coupled to the lower surface of the H-beam 110; A lower reinforcing rib 130 formed to protrude downward from the lower surface of the support plate 120; and an upper reinforcing rib 140 formed to connect the lower end of the H-beam 110 and the upper surface of the base plate 120. The support plate 120 is made of a circular plate material and is welded to the lower surface of the H-beam 110.

[Example 3-1] In the self-supporting retaining wall of the present invention, in Example 2-1, the lower reinforcing ribs 130 include horizontal ribs 131 and vertical ribs 132 arranged in a '+' shape. The upper reinforcing rib 140 includes a flange reinforcing rib 141 installed to connect the flange 111 of the H-beam 110 and the base plate 120, and the web 112 of the H-beam 110 ) and a web reinforcing rib 142 installed to connect the support plate 120.

Two flange reinforcing ribs 141 are provided and installed on the two flanges 111 of the H-beam 110 toward the outside of the H-beam 110. Two web reinforcing ribs 142 are provided and installed on both sides of the web 120 of the H-beam 110, respectively. The lower reinforcing rib 130 and the upper reinforcing rib 140 may be coupled to the support plate 120 and the H-beam 110 by welding. The pile 100 can be stably fixed to the ground by the lower reinforcing rib 130, and the pile 100 has a solid structure by the upper reinforcing rib 140.

[Example 4-1] In the self-supporting retaining wall of the present invention, in Example 1-1, the wall panel 300 has a front part 311 and a plan protruding backward from both ends of the front part 311 A 'c' shaped first wall panel 310 including a branch 312 and a '-' shaped second wall panel 320 disposed in parallel with the front part 311 of the first wall panel 310 ) is repeatedly installed and configured.

That is, the wall panel 300 has a structure in which a '-'-shaped second wall panel 320 is installed between the 'c'-shaped first wall panel 310. In addition, the first wall panel 310 and the second wall panel 320 may be made of a structure divided into two or more vertically.

[Example 4-2] In the self-supporting retaining wall of the present invention, in Example 4-1, one side of the first wall panel 310 extends along the vertical direction of the first wall panel 310. A coupling groove 313 is formed, and a first coupling protrusion 314 extending along the vertical direction of the first wall panel 310 is formed on the other side of the first wall panel 310, and the second wall panel 310 is formed. On one side of the panel 320, a second coupling groove 321 extending along the vertical direction of the second wall panel 320 and into which the first coupling protrusion 314 of the first wall panel 310 is inserted is formed. And, on the other side of the second wall panel 320, the second coupling extends along the vertical direction of the second wall panel 320 and is inserted into the first coupling groove 313 of the first wall panel 310. A protrusion 322 is formed.

According to the configuration as in Example 4-2, the plurality of first wall panels 310 and the plurality of second wall panels 320 constituting the wall panel 300 can be firmly installed in mutually accurate positions. .

[Example 4-3] In Example 4-2, the self-supporting retaining wall of the present invention is a water expansion resistant material interposed between adjacent portions of the first wall panel 310 and the second wall panel 320 (not shown) city), including

[Example 5-1] In Example 1-1, the self-supporting retaining wall of the present invention further includes a connection part 400 connecting the pile 100 and the wall panel 300, but the connection part 400 ) is installed to extend left and right on the front surface of the pile 100, one flange is installed to contact the pile 100, and the other flange is installed to contact the wall panel 300 C-beam 410; and a form tie 420 installed to connect the other flange of the C-beam 410 and the wall panel 300.

A plurality of the C-beams 410 are installed along the vertical longitudinal direction of the pile 100. The C-beam 410 may be welded to the pile 100. The C-beam 410 is spaced apart from the pile 100 and the wall panel 300 so that a space in which concrete is poured is secured between the pile 100 and the wall panel 300. As the form tie 420, various form ties used to fix a formwork or the like at a construction site may be selected and applied.

[Example 6-1] In the self-supporting retaining wall of the present invention, in Example 5-1, the front surface of the wall panel 300 has an end of the form tie 420 protruding through the wall panel 300 A buried groove 340 is formed, and the buried portion 350 covering the end of the form tie 420 is filled in the buried groove 340 .

A plurality of the buried grooves 340 are formed in the back body panel 300 to correspond to the structure in which the C-beams 410 are arranged. The embedding part 350 may be formed by filling the embedding groove 340 with mortar after the form tie 420 is installed.

[Example 7-1] The self-supporting retaining wall construction method of the present invention includes a wall panel manufacturing step (S20) of manufacturing a wall panel 300 using a precast concrete method; A drilling step (S30) of forming a plurality of holes 10 in the ground; A file insertion step (S40) of inserting a file 100 into the hole 10; After the pile insertion step (S40), an excavation step (S50) of installing an earth plate 200 at the rear of the pile while digging the ground in front of the pile 100; After the excavation step (S50), a wall panel installation step (S60) of installing the wall panel 300 in front of the pile 100; and a concrete pouring step (S70) of placing concrete between the earth plate 200 and the wall panel 300 after the wall panel installation step (S60).

[Example 7-2] The self-supporting retaining wall construction method of the present invention, in Example 7-1, includes a pile manufacturing step (S10) of manufacturing piles 100 before the drilling step (S30).

[Example 7-3] In the self-supporting retaining wall construction method of the present invention, in Example 7-2, the pile manufacturing step (S10) includes an H-beam preparation step (S11) of preparing the H-beam 110; A support plate coupling step (S12) of coupling the support plate 120 to the lower surface of the H-beam 110; A lower reinforcing rib coupling step (S13) of coupling the lower reinforcing rib 130 to the lower surface of the support plate 120; and an upper reinforcing rib coupling step (S14) of coupling the upper reinforcing rib 140 to connect the lower end of the H-beam 110 and the upper surface of the base plate 120.

[Example 7-4] In the self-supporting retaining wall construction method of the present invention, in Example 7-1, the wall panel manufacturing step (S20) is a mold preparation step of preparing a mold for manufacturing the wall panel 300 (S21); An insert installation step (S23) of installing an insert inside the mold; A concrete injection step (S24) of injecting concrete into the mold; and a curing step (S25) of curing the concrete injected into the mold.

In the insert installation step (S23), the reinforcing bar and the PVC pipe insert for forming the drainage channel 330 are installed inside the mold.

[Example 7-5] In the self-supporting retaining wall construction method of the present invention, in Example 7-4, the wall panel manufacturing step (S20) is to coat the inside of the mold with a release agent before the insert installation step (S23) A release agent coating step (S22) is included.

The release agent coating step (S22) may consist of a process of applying a liquid release agent to the inner surface of the mold.

According to the release agent coating step (S22), after the curing step (S25), the manufactured wall panel 300 can be easily separated from the mold.

[Example 7-6] In the self-supporting retaining wall construction method of the present invention, in Example 7-4, the concrete injection step (S24) includes a mold vibration step of vibrating the mold during the process of pouring concrete into the mold do.

According to the mold vibrating step, since the air mixed with the concrete can be smoothly discharged and the density of the concrete can be increased, a more robust wall panel 300 can be manufactured.

[Example 7-7] In the self-supporting retaining wall construction method of the present invention, in Example 7-4, the concrete injection step (S24) is performed using non-shrinkage concrete.

As described above, if the non-shrinkage concrete is used, it is possible to prevent shrinkage of the concrete during the curing step (S25), thereby preventing cracks and deformation of the wall panel 300, and making the wall panel 300 of the correct specification. can be produced

[Example 7-8] In the self-supporting retaining wall construction method of the present invention, in Example 7-4, the curing step (S25) includes a mold temperature control step of controlling the temperature of the mold.

The mold temperature control step consists of a process of partially controlling the temperature of the mold while maintaining a constant temperature of the mold using heaters installed in various places of the mold. According to this, by maintaining different curing temperatures according to the thin and thick parts of the wall panel 300, it is possible to minimize the difference in shrinkage and the difference in curing rate of concrete due to the difference in thickness.

[Example 7-9] The self-supporting retaining wall construction method of the present invention, in Example 7-1, includes a hole-filling step of filling the hole 10 after the pile insertion step (S40).

In the hole filling step, the pile 100 is firmly fixed to the ground by filling the space between the hole 10 and the pile 100 with soil, mortar, concrete, or the like.

[Example 7-10] In the self-supporting retaining wall construction method of the present invention, in Example 7-1, the wall panel installation step (S60) is to mount the C-beam 410 on the front of the pile 100 C-beam mounting step (S61); A wall panel arrangement step (S62) of arranging the wall panel 300 in front of the C-beam 410 so that the position of the C-beam 410 and the position of the buried groove 340 of the wall panel 300 coincide; A form tie fastening step (S63) of fastening the form tie 420 to fix the C-beam 410 and the wall panel 300; and a buried portion forming step (S64) of forming the buried portion 350 in the buried groove 340 of the wall panel 300.

According to the self-supporting retaining wall and the construction method of the present invention configured as described above, the effect that the self-supporting retaining wall can be easily constructed without the installation of formwork at the construction site using the wall panel 300 manufactured by the precast concrete method there is

In addition, according to the self-supporting retaining wall and its construction method of the present invention, since the pile 100 can be firmly fixed to the ground, and the pile 100 and the wall panel 300 can be firmly fixed to each other, more robust There is an effect that can provide a self-supporting retaining wall of the structure.

100: pile 110: H-beam
111: flange 112: web
120: support plate 130: lower reinforcing rib
131: horizontal rib 132: vertical rib
140: upper reinforcing rib 141: flange reinforcing rib
142: web reinforcing rib 200: earth plate
300: wall panel 310: first wall panel
311: front part 312: flange part
313: first coupling groove 314: first coupling protrusion
320: second wall panel 321: second coupling groove
322: second coupling protrusion 330: drain
340: landfill groove 350: landfill part
400: connection part 410: C-beam
420: form tie 500: reinforcement

Claims (7)

A plurality of piles 100 installed on the ground;
Earth plate 200 installed at the rear of each pile 100; and
In a self-supporting retaining wall including a wall panel 300 made of precast concrete installed in front of each pile 100
The pile 100 includes an H-beam 110 installed to extend vertically, a support plate 120 coupled to the lower surface of the H-beam 110, and a lower reinforcing rib 130 formed to protrude downward on the lower surface of the support plate 120 ), an upper reinforcing rib 140 formed to connect the lower end of the H-beam 110 and the upper surface of the base plate 120;
The lower reinforcing rib 130 includes a horizontal rib 131 and a vertical rib 132 disposed in a '+' form, and the upper reinforcing rib 140 is the flange 111 of the H-beam 110 And a flange reinforcing rib 141 installed to connect the support plate 120, and a web reinforcing rib 142 installed to connect the web 112 of the H-beam 110 and the support plate 120; Forming,
The connection part 400 connecting the pile 100 and the wall panel 300 is installed to extend left and right on the front surface of the pile 100, so that one side flange comes into contact with the pile 100. A C-beam 410 installed so that the other flange is in contact with the wall panel 300, and a form tie 420 installed to connect the other flange of the C-beam 410 and the wall panel 300; self-supporting retaining wall.
delete delete According to claim 1,
The wall panel 300 is
The front part 311 and the 'c' shaped first wall panel 310 including the flange part 312 protruding backward from both ends of the front part 311 and the first wall panel 310 A self-supporting retaining wall, characterized in that the '-' shaped second wall panel 320 disposed in parallel with the front part 311 is repeatedly installed.
delete According to claim 1,
The front surface of the wall panel 300 is formed with a buried groove 340 in which the end of the form tie 420 protruding through the wall panel 300 is accommodated,
The self-supporting retaining wall, characterized in that the buried portion 350 covering the end of the form tie 420 is filled in the buried groove 340.
A wall panel manufacturing step (S20) of manufacturing a wall panel (300) using a precast concrete method, a drilling step (S30) of forming a plurality of holes (10) in the ground, a pile (100) in the hole (10) A pile insertion step (S40) of inserting a pile, a trench excavation step (S50) of installing an earth plate 200 at the rear of the pile while digging the ground in front of the pile 100 after the pile insertion step (S40), the trench After the step (S50), the wall panel installation step (S60) of installing the wall panel (300) in front of the pile (100) and the earth plate (200) and the wall panel (300) after the wall panel installation step (S60) In the self-supporting retaining wall construction method of claim 1 including the concrete casting step (S70) of placing concrete between the
Before the drilling step (S30), a file production step (S10) of producing a file (100);
The pile manufacturing step (S10) includes an H-beam preparation step (S11) of preparing the H-beam 110;
A support plate coupling step (S12) of coupling the support plate 120 to the lower surface of the H-beam 110;
A lower reinforcing rib coupling step (S13) of coupling the lower reinforcing rib 130 to the lower surface of the support plate 120;
and an upper reinforcing rib coupling step (S14) of coupling the upper reinforcing rib 140 to connect the lower end of the H-beam 110 and the upper surface of the base plate 120 (S14).

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