KR101407968B1 - Concrete Panel for Retaining Wall, and Reinforcing Method of Inclined Surface, and Constructing Method of Water Channel Wall using such Concrete Panel - Google Patents

Abstract

The present invention relates to a concrete panel for a retaining wall, a reinforcing method using the same, and a waterway reinforcing wall construction method using the same. A concrete panel for a retaining wall includes a transverse connection structure, which enables a plurality of the concrete panels to be stably connected each other in the transverse direction by a linear connection member, and transverse linear change structure, which enables a transverse connection angle between the adjacent concrete plane slopes to be changed as necessary, when reinforcing a slope to prevent the slope from being collapsed or using the concrete panel to construct a waterway reinforcing wall forming a side wall of a waterway in which water flows.

Description

TECHNICAL FIELD [0001] The present invention relates to a precast concrete panel for a retaining wall having a transverse binding structure and a transversely linear variable structure, a slope reinforcing method using the same, and a method for constructing a water retaining wall such Concrete Panel}

The present invention relates to a concrete panel for a retaining wall made of precast concrete and supported by an earth anchor to form a retaining wall, a method for reinforcing a slope using such a concrete panel, More particularly, the present invention relates to a method of constructing a retaining wall by using a concrete panel to reinforce a slope to prevent a slope slope collapse, or to construct a retaining wall by water to form a side wall of a water channel through which water flows, A transversely laterally coupled structure for allowing a plurality of concrete panels to be firmly coupled to each other by a linear binding material and a transverse linear variable structure capable of changing a lateral connection angle between adjacent concrete panels as needed A retaining wall concrete panel, A slope reinforcement method using a panel, and a water retaining wall construction method for forming a waterway using the concrete panel.

Korean Patent Registration No. 10-650392 discloses an example of a conventional technique for constructing a retaining wall by supporting a concrete panel made of precast concrete on an inclined slope by supporting it with an anchor. Concrete panels fabricated from precast concrete members throughout this specification are simply referred to as "panels ". And the width direction of the panel is referred to as "lateral direction " throughout this specification.

In the prior art, a plurality of panels are laterally disposed adjacent to each other to form a single step for reinforcing the inclined surface, and these steps are arranged in a step-like manner. However, in the conventional art, when the panels are disposed adjacent to each other in the lateral direction, since the lateral side of the panel is simply in contact with the plane, due to various factors such as the earth pressure and the design, Often occurs, which in turn leads to weakening of the slope reinforcement function of the corresponding stage. Particularly, in the case of the conventional technique, when a plurality of panels are arranged continuously in the transverse direction, there is no configuration that can change the transverse continuous linear shape as needed. Therefore, If it is necessary to arrange the panels so as to have a linear shape of a curved line in the lateral direction, a gap is generated between the lateral side surfaces of the panel, thereby causing a problem that the back surface gravel flows out to the gaps.

On the other hand, in forming the water channel through which the water flows, conventionally, after slope is cut off, a temporary earth retaining wall is installed by using H file and wood, and the earth retaining wall is supported by an earth anchor After constructing the inverted T type retaining wall structure, the method of removing the temporary retaining wall was used. However, in this case, it takes time and expense to dismantle the temporary earth retaining wall, and the earth anchor supporting the temporary earth retaining wall is installed at a high cost. However, after installing the permanent earth retaining wall, There is a problem in that it is left unattended.

See Korean Patent Registration No. 10-0650392 (Announcement 2006. 11. 27).

The present invention has been developed in order to overcome the limitations and problems of the prior art as described above. Specifically, it is an object of the present invention to provide a method for reinforcing slopes using panels to prevent slope slope collapse, It is possible to prevent steps or the like between the lateral side surfaces of the panel from occurring even when the earth pressure or the like acts, And a plurality of panels can be arranged in a curved line shape of a desired shape in a lateral direction while preventing a gap from being generated in the panel.

In addition, the present invention can construct a water retaining wall corresponding to a side wall of a waterway by using a panel when water channels are formed, thereby eliminating the process of disposing the water retaining wall, which is required in the prior art, And it is an object of the present invention to provide a technique for reducing the time and cost associated with installation of a temporary earth retaining wall.

According to an aspect of the present invention, there is provided a precast concrete panel comprising a precast concrete plate member and forming a retaining wall for supporting the gypsum on the rear surface, the precast concrete panel having a convex curve shape protruding in the panel direction The curved surface shear-key convex portion having a curved surface is formed to be long in the vertical direction of the panel, and the curved surface shear key concave portion formed in a curved shape so as to insert the curved surface shear key convex portion into the other lateral side of the opposite side is formed long in the vertical direction, The curved surface shear-key convex portion is fitted to the curved surface shear-key concave portion so that the transverse side surfaces are in close contact with each other to be adjacent to each other when the transverse side surfaces are disposed adjacent to each other in the transverse direction, ; Wherein the panel is provided with a transverse horizontal through hole penetrating the panel in the lateral direction so that when the plurality of panels are adjacent to each other in the transverse direction, the binding wire is disposed through the plurality of the panels in the transverse horizontal through- And has a structure which is fixed to the transverse side and thereby is integrally bound; There is provided a precast concrete panel for a retaining wall, characterized in that a front through hole is formed through which an end of an earth anchor passes and is fixed.

In the precast concrete panel for retaining walls according to the present invention, a vegetation box in which a vegetation can be planted, or a vegetation box containing plant seeds, .

According to another aspect of the present invention, there is provided a method of constructing a retaining wall by using the precast concrete panel. In the method of constructing a retaining wall of the present invention, a precast concrete panel may be placed by cutting an inclined surface, Providing a foundation ground; A plurality of precast concrete panels are continuously disposed and integrated in the foundation foundation so that the back surface of the panel faces rearward so that the curved surface shear key convex portions are sandwiched between the adjacent precast concrete panels to the curved surface shear key concave portions A plurality of pre-cast concrete members are disposed on the transverse side surfaces of the plurality of pre-cast concrete panels, and a plurality of pre-cast concrete members are disposed on the lateral side surface of the plurality of precast concrete panels, Disposing the panels integrally in a transverse direction; Installing an earth anchor on the ground of the slope; Placing concrete on the rear surface of the precast concrete panel between the back surface of the panel and the inclined surface to bond the ground of the inclined surface and the precast concrete panel to each other; And an end of the earth anchor through the front through hole to settle at the front face of the precast concrete panel; There is provided a method of constructing a retaining wall using a precast concrete panel, which comprises laminating and filling a drainage layer and a backfill soil layer for drainage between a back surface and a slope surface of a precast concrete panel to the rear of a precast concrete panel.

In order to achieve the above-mentioned object, according to the present invention, there is provided a precast concrete panel comprising a precast concrete plate member and continuously supporting the pre-cast concrete panels supporting the gravel on the rear surface in a transverse direction to form an end of a retaining wall, A plurality of steps of the retaining wall are formed stepwise in addition to the method of constructing the retaining wall; And the front wall of the precast concrete panel is covered with the overlay concrete at the end of the stepped retaining wall so as to be the side wall of the water channel.

In the present invention, since the precast concrete panel has a linear variable structure capable of changing the joining angle between the neighboring precast concrete panels in the transverse direction, the state in which the transverse sides between the precast concrete panels are continuously and tightly bonded The panels can be installed continuously in the horizontal direction so as to bend along the slope topography while maintaining the slope of the slope so that the problems such as the occurrence of the gap between the precast concrete panels and the leakage of the slope can be avoided.

Further, in the present invention, a plurality of bundling wires are arranged to penetrate through a plurality of precast concrete panels, so that a plurality of precast concrete panels are more firmly integrated in the lateral direction by bundling wires.

Further, in the present invention, the water retaining wall is constructed by using the precast concrete panel having the advantages and effects as described above. Therefore, in forming the water channel through which the water flows, it is possible to omit the installation of the temporary earth retaining wall It is possible to save time and cost as much as that, and it is possible to utilize the earth anchor very usefully for supporting the precast concrete panel, and it is possible to economically and effectively construct the retaining wall by water.

Also, in the present invention, the front surface of the precast concrete panel can be easily recorded.

1 and 2 are perspective views schematically showing a panel according to an embodiment of the present invention, as viewed from different directions.
FIGS. 3 and 4 are schematic perspective views showing a process of assembling a plurality of panels laterally in the present invention, and a process of assembling the panels in the lateral direction. FIG.
5 is a schematic perspective view showing a configuration in which panels are continuously arranged in a bent shape so as to have a predetermined angle in a lateral direction in the present invention.
6 and 7 are schematic front views showing a state in which a plurality of panels are continuously arranged in the lateral direction in the present invention.
8 and 9 are schematic perspective views showing a process of assembling and installing the vegetation box on the front surface of the panel according to the present invention, and a state after assembling the vegetation box.
10 to 14 are schematic perspective views showing respective steps of a method for reinforcing a slope by constructing a retaining wall using the panel according to the present invention.
FIG. 15 is a schematic cross-sectional view in a water channel longitudinal direction showing a water retaining wall constructed using panels according to the present invention. FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby.

1 and 2 are schematic perspective views showing a panel 1 according to an embodiment of the present invention, viewed from different directions.

In the present specification, the rear side of the panel 1, that is, the rear direction of the panel 1 in which the gravel is filled is referred to as "rear", and the opposite direction is referred to as "front". Also, the rear surface of the panel 1 facing rearward is denoted as "back surface ", and the front surface of the panel 1 facing forward is denoted as" front surface ".

As shown in the figure, the panel 1 according to the present invention is constituted by a precast concrete plate member supporting a gravel-like material on an inclined surface to form a retaining wall. At the lower end thereof, the panel 1 is stably placed on the ground, There may be a horizontal part 11 made of a horizontal plate to function. The horizontal portion 11 may be formed to protrude forward as shown in the drawing.

In the present invention, a curved surface shear-key convex portion 12 having a convex curved shape in the direction of the adjacent panel and protruding in the panel direction is formed on one lateral side of the panel 1 in the height direction of the panel 1 And a curved surface shear key concave portion 13 formed in a curved shape so that the curved surface shear key convex portion 12 is inserted is formed on the other lateral side surface of the opposite side of the panel 1 in a vertical direction Respectively. In the panel 1, a transverse horizontal through hole 14 penetrating the panel in the lateral direction is formed. The horizontal through hole 14 may exist in plural.

On the other hand, in the panel 1 of the present invention, the front through hole 15 is formed so that the earth anchor 2 penetrates from the rear and the end of the earth anchor 2 can be fixed on the front surface of the panel 1. [ A stud bolt 5 may be provided on the front surface of the panel 1 for integrating the vegetation box with the concrete to be installed thereon. The stud bolts 5 may be attached to the bolt holes in accordance with necessity in a state where only the bolt holes are formed on the front surface of the panel 1. [ Particularly, the bolt hole may be formed as a through hole and used as a passage through which the ground water from the rear of the panel 1 is drained. Instead of the stud bolts 5, reinforcing bars embedded in the panel 1 may be exposed on the front surface of the panel 1 in order to reinforce the panel 1 to perform the functions of the stud bolts 5 It is possible.

Hereinafter, a process of arranging the panels 1 according to the present invention having the above-described configuration in the lateral direction and assembling them will be described. FIGS. 3 and 4 are schematic perspective views showing a process of assembling a plurality of panels 1 in a transverse direction and a process of assembling the panels 1, respectively. FIG. 5 is a perspective view of the panel 1, And FIG. 5B is a perspective view showing a perspective view showing a shape continuously arranged in a bent shape so as to have a predetermined angle in a direction of FIG.

The curved surface shear-key convex portion 12 is fitted in the curved surface shear-key concave portion 13 when the plurality of panels 1 are disposed adjacent to each other in the transverse direction so that their lateral sides are mutually continuous. As described above, in the present invention, between the panels 1 arranged next to each other in the transverse direction, the lateral side thereof has a linear variable structure by insertion of the curved surface shear key convex portion 12 and the curved surface shear key concave portion 13, Since the curved surface shear key convex portion 12 and the curved surface shear key concave portion 13 have a curved surface, the neighboring panels 1 can be folded along the curved surface in a state in which their lateral side surfaces are in close contact with each other. In other words, since the panel 1 of the present invention has a structure (linear variable structure) that can be folded while maintaining a state in which the side surfaces are kept in close contact with each other, the topography on which the panel is to be installed is not a straight line in the lateral direction, The panel 1 may be continuously arranged in the transverse direction in conformity with the linear shape of the terrain as shown in Fig. 5 by bending the transverse side so as to have a predetermined angle while maintaining the continuous continuous state. As pointed out earlier, in the prior art, conventional panels having a planar transverse side are only linearized when coupled to each other in the transverse direction, so that the plurality of panels are arranged so as to have a curved linear shape in the lateral direction There is a problem that gaps are generated between the lateral side surfaces of the panel so that the lateral side surfaces are separated from each other and the back surface gravel flows out to the gap. However, since the present invention has a linear variable structure that can vary the angle of coupling between the adjacent panels in the lateral direction as described above, it is possible to solve the problems of the related art. That is, in the present invention, the panels can be installed continuously in the horizontal direction so as to bend along the terrain of the slope while maintaining the state in which the lateral sides of the panels are closely adhered to each other continuously. Therefore, So that there is no problem.

Particularly, in the present invention, when the panels 1 are continuously arranged in the transverse direction, the bundling wires 3 in the transverse direction are arranged across the plurality of panels 1, so that the plurality of panels 1 are more firmly And has a transverse binding structure for integrating them. As described above, the panel 1 of the present invention is provided with the horizontal horizontal through holes 14 passing through the panel in the lateral direction. A plurality of binding wires 3 such as stranded wires and steel rods are arranged in a state in which a plurality of the panels 1 are arranged so as to be in contact with each other in the lateral direction so as to be in contact with each other, Both ends of the bundling wire 3 are arranged in such a manner that both ends of the bundling wire 3 are arranged on the transverse side of the panel 1 positioned on the outermost side of the panel 1, Respectively. It is preferable that a tension force is introduced into the bundling wire 3 when forming the transverse binding structure in which the bundling wire 3 penetrates the plurality of panels 1 to integrate the panel 1. [ That is, in the transverse coupling structure of the panel 1, the binding wire 3 is arranged so as to penetrate the panel 1, and both ends of the binding wire 3 are fixed on the lateral side of the panel 1 So that the panels 1 can maintain a stronger bond. The curved surface shear key convex portion 12 and the curved surface shear key concave portion 13 are formed so that the fixed end of the binding wire 3 does not protrude from the surface of the curved surface shear key convex portion 12 or the surface of the curved shear key concave portion 13, It is preferable that recessed fixing grooves for fixing the end portions of the binding wire 3 are formed.

On the other hand, in the present invention, it is also preferable that a plurality of binding wires 3 are arranged so as to be offset from each other in integrating the panel 1 with the bundling wires 3 passing through the plurality of panels 1. 6 and 7 show a schematic front view showing a state in which a plurality of panels 1 are continuously arranged in a transverse direction. For the sake of convenience, when viewed from the drawing, the first panel 1a, The second panel 1b, the third panel 1c, the fourth panel 1d and the fifth panel 1e. The first binding wire 3a, the second binding wire 3b and the third binding wire 3c are respectively referred to as a plurality of binding wires to be separately described.

As shown in Fig. 6, for example, the first bundling wire 3a is disposed by horizontally penetrating three panels of the first panel 1a, the second panel 1b and the third panel 1c The first and second panels 1b and 1c are fixed to the outer side surfaces of the first panel 1a and the third panel 1c respectively and the second binding wire 3b is fixed to the second panel 1b, The first and second panels 1b and 1d are arranged in such a manner that the first panel 1b and the second panel 1c are disposed in the lateral direction of the second panel 1b and the fourth panel 1d, Three panels of the first panel 1c, the fourth panel 1d and the fifth panel 1e are disposed so as to pass through in the lateral direction and the opposite ends of the third panel 1c and the fifth panel 1e, The plurality of binding wires 3 may be arranged so as to be offset from each other with respect to the plurality of the panels in the form of being fixed to the side surface. Of course, as shown in Fig. 7, the first bundling wire 3a is disposed by horizontally passing three panels of the first panel 1a, the second panel 1b and the third panel 1c, And the second binding wire 3b is fixed to the lateral side surfaces of the first panel 1a and the third panel 1c while the two panels of the third panel 1c and the fourth panel 1d are fixed in the lateral direction And the both ends of the third binding wire 3c are fixed to the outer lateral sides of the third panel 1c and the fourth panel 1d respectively and the third binding wire 3c is fixed to the fourth panel 1d and the fifth panel 1e And a plurality of binding wires 3 are arranged on the outer side of the fourth panel 1d and on the lateral side of the fifth panel 1e, As shown in Fig. That is, in the present invention, when the plurality of bundling wires 3 are arranged to be offset from each other with respect to a plurality of the panels, the interlaced shapes can be freely deformed. As described above, when the plurality of binding wires 3 are integrally bound to each other with the plurality of binding wires 3 being staggered with respect to the plurality of the panels, the lateral coupling relationship between the panels is further strengthened.

Meanwhile, in the present invention, a vegetation box 6 for greening can be assembled on the front surface of the panel 1. FIGS. 8 and 9 show a process of assembling and installing the vegetation box 6 on the front surface of the panel 1, respectively, and a perspective view of the plant after the assembly and installation thereof. As described above, the panel 1 of the present invention may be provided with a stud bolt 5 protruding from the front. The vegetation box 6, which is formed in the form of a box, may be hooked on the stud bolt 5, And can be installed on the front surface of the panel 1 by connecting with a wire or the like. It is possible to record the plant front surface of the panel 1 by allowing plants to grow in the vegetation box 6 by containing a cultivated soil capable of planting vegetation or a vegetation blanket containing plant seeds.

In the panel 1, there may be a drain hole for drainage of groundwater from the soil gypsum. When the vegetation box 6 is installed at the position where the drain hole is provided, the groundwater discharged through the drain hole is used for the vegetation of the plant There are advantages to be able to. The drain hole may be used as a hole for installing the stud bolt 5 if necessary. Instead of the stud bolts 5, as described above, reinforcing bars embedded in the panel 1 are exposed on the front surface of the panel 1 in order to reinforce the panel 1, so that the function of the stud bolts 5 . In addition to the method of installing the vegetation box 6 on the front surface of the panel 1 as described above, the vegetation fiber cloth is covered on the front surface of the panel 1 and fixed to the stud bolts 5, It is also possible to make a recording by making it grow and grow.

Next, a method of reinforcing the slope by constructing a retaining wall on the inclined surface using the panel 1 of the present invention having the above-described structure will be described. 10 to 14 are schematic perspective views sequentially showing respective steps of a slope reinforcement method by building a retaining wall. First, as shown in FIG. 10, a slope is cut to form a foundation foundation portion on which the panel 1 can be placed To be established. It is also preferable to excavate and cut the inclined plane and then lay the foundation concrete to flatten the position where the panel 1 is to be placed. As shown in Fig. 11, the panel 1 is disposed on the foundation ground portion such that the back surface of the panel 1 faces rearward. As shown in Fig. 12, the plurality of panels 1 are continuously integrated Respectively. The arrangement of the plurality of panels 1 in a continuous and integrated manner in the transverse direction is advantageous in that the linear variable structure and the binding wire 3 due to the coupling between the curved surface shear key convex portion 12 and the curved surface shear key concave portion 13, And a transverse binding structure in which the transversal binding members are arranged in a transverse direction to be coupled to the panels 1.

On the other hand, the earth anchor 2 is provided on the ground of the inclined surface in parallel with, or before or after, the operation of disposing the panel 1 and integrating a plurality of the panels 1 in the transverse direction. After the installation of the earth anchor 2 is completed and the work for arranging the panels 1 and integrating the plural pieces in the transverse direction is completed, the rear surface of the panel 1 is provided with a predetermined And the panel 1 is joined to the ground of the inclined surface by placing the concrete C in the height direction of the panel 1. The edge of the earth anchor 2 is passed through the front through hole 15 of the panel 1, (See Fig. 13). At this time, after the earth anchor 2 is strained, it is fixed on the front surface of the panel 1. 14, a drainage layer for drainage and a backfill soil layer are stacked and filled between the rear surface of the panel 1 and the inclined surface to the rear of the panel 1, Covering the front surface of the panel (1) by placing the covering concrete or installing a vegetation mat or vegetation box. At this time, it is preferable to install the stud bolts in advance before the overlay concrete is poured.

Through the above-described process, one retaining wall is formed on the inclined surface by the panel 1, and if necessary, the above-described retaining wall steps are formed stepwise along the inclined surface to reinforce and stabilize the inclined surface.

In particular, after the panel 1 is installed as described above and the retaining wall end is formed on a slope in a plurality of layers by calculation, the front face of the panel 1 is covered with overlay concrete to construct a retaining wall with water, do. Fig. 15 is a schematic sectional view in the water channel longitudinal direction showing a state in which a water retaining wall is constructed using the panel 1. Fig. As described in connection with the prior art, in forming a water channel through which water flows, conventionally, an inverted T-type retaining wall structure corresponding to a side wall of a waterway is constructed in a state of supporting a temporary earth retaining wall by using an earth anchor, The time and expense required for construction and dismantling of the temporary earth retaining wall and the use of earth anchor have been a problem. However, according to the present invention, there is no need to install a permanent earthen wall, And it is possible to use the earth anchor very usefully for supporting the panel, thus making it possible to economically and efficiently construct the retaining wall with water.

1: Panel
2: Earth anchor
3: Bond wire
12: curved surface shear-
13: curved shear key recess

Claims (4)

A precast concrete panel (1) comprising a precast concrete plate member and forming a retaining wall for supporting gravel on the back surface,
The curved surface shear-key convex portion 12 having a convex curved shape and protruding in the panel direction is formed to be long in the vertical direction of the precast concrete panel 1, and on the other lateral side of the opposite side, The curved surface shear key concave portion 13 formed to be concave in a curved shape so as to insert the convex portion 12 is formed long in the vertical direction so that the adjacent precast concrete panels 1 are arranged in the transverse direction The curved surface shear key convex portion 12 is fitted to the curved surface shear key concave portion 13 so that the transverse side is closely attached to the curved surface shear key convex portion 12 when the curved surface shear key convex portion 12 and the curved surface shear key concave portion 13 are disposed adjacent to each other. It is possible to change the angle in the transverse direction by being bent along the close curved surface of the base 13,
The precast concrete panel 1 is provided with a horizontal horizontal through hole 14 penetrating the panel in the lateral direction so that when the plurality of precast concrete panels 1 are adjacent to each other in the lateral direction, The bundling wire (3) is inserted into the through hole (14) through a plurality of precast concrete panels (1) and both ends are fixed to the lateral side to be integrally connected. The end of the bundling wire (3) The fixed end of the bundling wire 3 is fixed to the curved surface shear-key convex portion 12 or the curved surface shear-key concave portion 13 of the pre-cast concrete panel 1, 13) so that an end of the bundling wire (3) is fixed in the fixing groove;
And a front through hole (15) through which an end of the earth anchor (2) penetrates and is fixed is formed in the precast concrete panel (1).
The method according to claim 1,
A vegetation box 6 in which a vegetation can be planted and a vegetation cell containing plant seeds is placed on the front surface of the precast concrete panel 1 so that greening can be performed on the front surface of the precast concrete panel 1 Wherein the precast concrete panel comprises a plurality of pre-cast concrete panels.
A method of constructing a retaining wall by a precast concrete panel (1) comprising a precast concrete plate member and supporting soil gravel on the back surface,
The curved surface shear-key convex portion 12 protruding in the direction of the precast concrete panel with a convex curved shape on one lateral side of the precast concrete panel 1 is elongated in the vertical direction of the precast concrete panel 1 And a curved surface shear key concave portion 13 formed in a curved shape so as to insert the curved surface shear key convex portion 12 is formed in the other lateral side of the opposite side in a vertical direction, A horizontal through hole 14 is formed and a front through hole 15 through which the end portion of the earth anchor 2 passes and is fixed is formed and the precast concrete panels 1 adjacent to each other are provided with lateral sides The curved surface shear key convex portion 12 is fitted into the curved surface shear key concave portion 13 so that the curved surface shear key convex portion 12 and the curved surface convex portion 12 Kkeokyige is along the contact surface of the key recess 13 has a configuration in which the angle at which a row in the lateral direction can be changed;
When the plurality of precast concrete panels 1 are continuous in the transverse direction, the precast concrete panel 1 located at the outermost side is formed such that the ends of the bundling wire 3 are curved surface shear-key convex portions 12 or curved surface shear- A concave fixing groove is formed in the curved surface shear-key convex portion 12 or the curved surface shear-key concave portion 13 so as to be fixed without being projected to the surface of the portion 13;
Cutting the slopes to form a foundation foundation in which the precast concrete panel 1 can be laid;
A plurality of precast concrete panels (1) are successively arranged in the lateral direction so as to be integrated in the foundation ground portion so that the back surface of the precast concrete panel (1) faces backward, and between the adjacent precast concrete panels The curved surface shear-key convex portion 12 is sandwiched between the curved surface shear-key concave portion 13 and the angle formed by the transverse direction is bent so as to match the topographic shape of the slope and the transverse direction horizontal through- (1) through a plurality of precast concrete panels (1) and fixing both ends of the precast concrete panels (1) on lateral sides to bind the plurality of precast concrete panels (1) in a transverse direction integrally;
Providing an earth anchor (2) on the ground of the inclined plane;
Placing concrete (C) between the back surface and the inclined surface of the precast concrete panel (1) to the rear of the precast concrete panel (1) and joining the precast concrete panel (1) to the ground of the inclined surface; And
An end of the earth anchor 2 is passed through the front through hole 15 to fix it on the front surface of the precast concrete panel 1; And a step of laminating and filling a drainage layer and a backfill soil layer for drainage between the back surface and the inclined surface of the precast concrete panel (1) to the rear of the precast concrete panel (1) Construction method.
The precast concrete panel 1 is composed of precast concrete plate members and supports the gravel on the back surface. The precast concrete panels 1 are continuously arranged in the transverse direction to form the ends of the retaining walls. The ends of the retaining walls are formed in a stepwise manner to form the side walls As a method of constructing a water retaining wall,
The precast concrete panel 1 has curved surface shear-key convex portions 12 protruding in the panel direction with a convex curved shape on one side lateral side thereof being elongated in the vertical direction of the precast concrete panel 1 , A curved surface shear key groove (13) formed concavely in a curved shape so as to insert the curved surface shear key convex part (12) on the other lateral side of the opposite side is formed long in the vertical direction, and a horizontal horizontal A through hole 14 is formed and a front through hole 15 through which the end portion of the earth anchor 2 passes and is fixed is formed so that the adjacent precast concrete panels 1 are connected to each other When the curved surface shear key convex portion 12 is fitted into the curved surface shear key concave portion 13 so that the curved surface shear key convex portion 12 and the curved surface shear key concave portion 13 are in close contact with each other And has a configuration in which the angle in the transverse direction can be changed by being bent along the curved surface;
When the plurality of precast concrete panels 1 are continuous in the transverse direction, the precast concrete panel 1 located at the outermost side is formed such that the ends of the bundling wire 3 are curved surface shear-key convex portions 12 or curved surface shear- A concave fixing groove is formed in the curved surface shear-key convex portion 12 or the curved surface shear-key concave portion 13 so as to be fixed without being projected to the surface of the portion 13;
Cutting the slopes to form a foundation foundation in which the precast concrete panel 1 can be laid;
A plurality of precast concrete panels (1) are successively arranged in the lateral direction so as to be integrated in the foundation ground portion so that the back surface of the precast concrete panel (1) faces backward, and between the adjacent precast concrete panels The curved surface shear-key convex portion 12 is sandwiched between the curved surface shear-key concave portion 13 and the angle formed by the transverse direction is bent so as to match the topographic shape of the slope and the transverse direction horizontal through- ) Are disposed in a plurality of precast concrete panels (1), and both ends of the binding wire (3) are fixed in concave fixing grooves formed on lateral sides of the outermost precast concrete panel (1) Placing the precast concrete panel 1 in a bundled state in a transverse direction;
Providing an earth anchor (2) on the ground of the inclined plane;
Placing concrete (C) between the back surface and the sloped surface of the panel (1) to the rear of the precast concrete panel (1) and joining the precast concrete panel (1) to the ground of the sloped surface; And
An end of the earth anchor 2 is passed through the front through hole 15 to fix it on the front surface of the precast concrete panel 1; Forming an end of a retaining wall by inclining the rear surface of the precast concrete panel (1) to the rear of the precast concrete panel (1);
After a plurality of steps of the retaining wall are formed stepwise;
And the front wall of the precast concrete panel (1) is covered with overlay concrete at the end of the stepped retaining wall so as to be a side wall of the water channel.

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