JP2015161122A - Construction method of retaining wall and retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfactory reinforce the ground and retaining wall.SOLUTION: The construction method of retaining wall is a method to construct a retaining wall 50 along a plane to be reinforced of the ground (for example, an inclined plane 3) by piling a step structure 51 in plural steps. The step structure 51 of the respective steps includes: a cell assembly 2 of plural flexible cell structures 1 which are arranged in a honeycomb shape and integrated with each other; and a filling material 8 which is filled in the respective cell structures 1 of the cell assembly 2. The construction method includes the steps of: reinforcing the ground by embedding a rod-like ground reinforcement member 100 in the ground; and constructing the retaining wall 50 so that the ground reinforcement member 100 is connected to the retaining wall.

Description

  The present invention relates to a retaining wall construction method and a retaining wall.

  As a method for reinforcing the ground, there is a method called a geocell method. In this construction method, a cell aggregate composed of a plurality of cell structures arranged in a honeycomb shape is used. The cell structure is a lightweight mold made of a flexible material such as a synthetic resin. Each cell structure is filled with a filling material such as earth and sand or crushed stone.

  When a retaining wall is constructed by the geocell construction method to protect the inclined surface of natural ground, cell assemblies filled with filling material are stacked in each cell structure (see Patent Document 1).

  Furthermore, Patent Document 1 describes that a tendon is passed through a cell assembly (a cell structure of the same document), and both ends of the tendon are fixed to a natural ground by binding to anchors placed in the ground. Has been. Patent Document 1 describes that such a structure can firmly fix the retaining wall with respect to the inclined surface of the natural mountain, and can improve the integrity of the stacked cell aggregates.

JP 2013-112966 A

The present inventors considered that the technique described in Patent Document 1 has the following problems.
Since tendon has flexibility, it is difficult for tendon to stabilize the retaining wall sufficiently. In addition, the natural ground protected by the retaining wall may be insufficiently stable. In such a case, it is difficult to secure sufficient stability of the retaining wall even if the tendon is anchored to the natural ground. It is.

The objective of this invention is providing the construction method of the retaining wall which can improve the stability of the structure containing a retaining wall and a natural ground.
Moreover, the objective of this invention is providing the retaining wall structure of the structure which can acquire the high stability of the structure containing a retaining wall and a natural ground.

The present invention
A method of constructing a retaining wall along the surface to be reinforced of the natural ground by laminating stepped structures in multiple stages,
The step structure of each step is a cell assembly made up of a plurality of flexible cell structures arranged in a honeycomb shape and integrated with each other, and each cell structure of the cell assembly is filled. And a filling material,
The construction method is
Reinforcing the natural ground by embedding a rod-shaped natural ground reinforcing material in the natural ground;
Constructing the retaining wall such that the natural ground reinforcement is coupled to the retaining wall;
The construction method of the retaining wall including is provided.

According to the construction method of the retaining wall, the retaining wall can be stably constructed after the natural ground is sufficiently reinforced by the rod-shaped natural ground reinforcing material. And since the natural ground reinforcement is connected with respect to a retaining wall, while being able to ensure the integrity of a retaining wall and a natural ground, a retaining wall can be stabilized further.
In addition, since the retaining wall can be constructed after reinforcing the natural ground with the rod-shaped ground reinforcing material, the retaining wall should be constructed along the natural ground where the inclination angle of the surface to be reinforced is more vertical. Can do. By doing in this way, compared with the case where the inclination angle of the reinforcement target surface of a natural ground is loose, the land can be effectively used.

The present invention also provides:
A retaining wall structure including a retaining wall constructed along a reinforcement target surface of a natural ground by laminating a step structure in a plurality of stages,
The step structure of each step is a cell assembly made up of a plurality of flexible cell structures arranged in a honeycomb shape and integrated with each other, and each cell structure of the cell assembly is filled. And a filling material,
The retaining wall structure is
It has a rod-shaped natural ground reinforcing material that is embedded in the natural ground and reinforces the natural ground,
The natural ground reinforcing material provides a retaining wall structure connected to the retaining wall.

According to the present invention, the stability of the retaining wall can be improved.
Further, according to the present invention, it is possible to provide a retaining wall structure with high stability.

It is a sectional side view of the retaining wall structure which concerns on 1st Embodiment. It is a top view of the retaining wall structure concerning a 1st embodiment. It is the elements on larger scale which show the retaining wall structure concerning a 1st embodiment, among these, Drawing 3 (a) is a top view and Drawing 3 (b) is a sectional view which met an AA line of Drawing 3 (a). It is. 4A and 4B are cross-sectional views showing a series of steps of the retaining wall construction method according to the first embodiment. It is a perspective view of the cell aggregate | assembly which has the some cell structure integrally formed mutually. It is a perspective view which shows the state which deform | transformed the cell assembly so that the opening area of each cell structure may spread. It is the elements on larger scale which show the retaining wall structure which concerns on 2nd Embodiment, Among these, Fig.7 (a) is a top view, FIG.7 (b) is sectional drawing along the AA line of Fig.7 (a). It is. It is the elements on larger scale which show the retaining wall structure which concerns on 3rd Embodiment, among these, Fig.8 (a) is a top view, FIG.8 (b) is sectional drawing along the AA line of Fig.8 (a). It is. It is a sectional side view of the retaining wall structure which concerns on 4th Embodiment. FIGS. 10A and 10B are views for explaining a series of steps of the retaining wall construction method according to the fifth embodiment. Each of FIGS. 11A to 11D is a diagram illustrating an example of a plate unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

[First Embodiment]
FIG. 1 is a side sectional view of a retaining wall structure according to the first embodiment. FIG. 2 is a plan view of the retaining wall structure according to the first embodiment. In FIG. 2, the top end of the retaining wall 50 is not shown. 3 (a) and 3 (b) are partially enlarged views showing the retaining wall structure according to the first embodiment, in which FIG. 3 (a) is a plan view and FIG. 3 (b) is FIG. 3 (a). It is sectional drawing along the AA of. 4A and 4B are cross-sectional views showing a series of steps of the retaining wall construction method according to the first embodiment. FIG. 5 is a perspective view of a cell assembly 2 having a plurality of cell structures 1 integrally formed with each other. FIG. 6 is a perspective view showing a state in which the cell assembly 2 is deformed so that the opening area of each cell structure 1 is expanded.

The construction method of the retaining wall according to the present embodiment is a construction method of constructing the retaining wall 50 along the reinforcement target surface (for example, the inclined surface 3) of the natural ground by stacking the step structures 51 in a plurality of stages. The step structure 51 of each step is formed in a cell assembly 2 composed of a plurality of flexible cell structures 1 arranged in a honeycomb shape and integrated with each other, and in each cell structure 1 of the cell assembly 2. Filled filling material 8.
This construction method includes a step of reinforcing the natural ground by embedding a rod-shaped natural ground reinforcing material 100 in the natural ground, a step of constructing the retaining wall 50 so that the natural ground reinforcing material 100 is connected to the retaining wall, including.

In addition, the retaining wall structure according to the present embodiment includes a retaining wall structure including a retaining wall 50 constructed along a reinforcement target surface (for example, the inclined surface 3) of the natural ground by stacking the step structure 51 in a plurality of stages. It is. The step structure 51 of each step is formed in a cell assembly 2 composed of a plurality of flexible cell structures 1 arranged in a honeycomb shape and integrated with each other, and in each cell structure 1 of the cell assembly 2. Filled filling material 8.
The retaining wall structure has a rod-shaped ground reinforcing material 100 that is embedded in a natural ground and reinforces the natural ground, and the natural ground reinforcing material 100 is connected to the retaining wall 50.

  In the construction method according to the present embodiment, for example, a cell assembly 2 as shown in FIGS. 5 and 6 is used. The cell assembly 2 has a plurality of cell structures 1 arranged in a honeycomb shape and integrally formed with each other.

  The cell assembly 2 has three or more long strip members 7 made of a flexible material. These strip members 7 are arranged in parallel with each other. The arrangement direction (arrangement direction) of these strip members 7 is the arrow A direction, and the longitudinal direction of these strip members 7 is the arrow B direction. The pair of strip members 7 adjacent to each other are joined to each other at each of the joining portions 13 arranged at regular intervals in the longitudinal direction (the direction of arrow B). Among these joint portions 13, individual cell structures 1 are formed by a pair of strip members 7 ranging from one joint portion 13 to another joint portion 13 positioned next to the one joint portion 13 in the direction of arrow B. Is configured. The first strip material 7 and the second strip material 7 adjacent to each other among the plurality of strip materials 7 are joined portions 13 (first joints) arranged at regular intervals in the longitudinal direction (arrow B direction). Are joined together. The second strip material 7 and the third strip material 7 adjacent to the second strip material 7 on the opposite side of the first strip material 7 are in the longitudinal direction (direction of arrow B). Are joined to each other at each of the joint portions 13 (second joint portions) arranged at regular intervals. The position of each 2nd junction part in the arrangement direction (arrow B direction) of a 2nd junction part is set to the middle position of the 1st junction part which adjoins. Similarly, the position of each 1st junction part in the arrangement direction (arrow B direction) of a 1st junction part is set to the intermediate position of the adjacent 2nd junction part.

  The strip material 7 is made of a resin material such as high density polyethylene. Adjacent strip members 7 are welded to each other at the joint 13 by, for example, thermocompression bonding.

  The number of cell structures 1 (number of cells) included in one cell aggregate 2 is arbitrary. Note that the cell aggregate 2 shown in FIG. 5 and the cell aggregate 2 shown in FIG. 6 have different numbers of cells.

Each of the cell structures 1 is formed by a pair of flexible strips 11 and 12. The pair of strips 11 and 12 are integrated by being joined to each other at the joints 13 disposed at both ends in the longitudinal direction, thereby forming the cell structure 1.
That is, the strips 11 and 12 are formed of a part of the pair of strip members 7 in the longitudinal direction. The strip 11 is a structure shared by a plurality of cell structures 1 partitioned from each other by the strip 11. Similarly, the belt-like body 12 is a structure shared by a plurality of cell structures 1 partitioned from each other by the belt-like body 12.

  A plurality of drain holes (not shown) may or may not be formed in the strips 11 and 12.

  By deforming the cell assembly 2 so that the intermediate portions between both ends of the band-like bodies 11 and 12 of each cell structure 1 are separated from each other, the cell assembly is expanded so that the opening area of each cell structure 1 is expanded. 2 can be extended (FIG. 6). Here, as shown in FIG. 6, the positions of the joint portions 13 are set so that the joint portions 13 are arranged in a staggered manner in a plan view in a state where the cell aggregate 2 is stretched. For this reason, a plurality of cell structures 1 are arranged in a honeycomb shape in a state where the cell aggregate 2 is stretched. FIG. 6 shows a state in which some of the cell structures 1 are filled with the filling material 8 and the remaining cell structures 1 are not filled with the filling material 8.

  As shown in FIGS. 1 and 2, the retaining wall 50 is disposed, for example, along the inclined surface 3 of the natural ground to protect (reinforce) the inclined surface 3. The inclined surface 3 is formed between the lower flat surface 4 and the upper flat surface 5, for example. The slope 3 includes cut, bank, existing bank, natural slope, ground (cut slope, bank slope, existing bank slope, road slope, slope on industrial grounds such as industrial parks, rivers Embankments, coastal embankments, reservoir pond bodies, railway slopes), ruins of collapse, and steep slopes.

  The retaining wall 50 is constructed by stacking the step structure 51 in a plurality of steps. The stage structure 51 of each stage is formed, for example, by connecting a plurality of cell assemblies 2 in the horizontal direction. For each stage structure 51, cell structures 1 that are adjacent to each other in the horizontal direction are connected to each other to form a cell structure 1 at the joint between the cell assemblies 2. By forming the cell structure 1 at the joint between the cell assemblies 2, each step structure 51 receives a force as a surface without being biased with respect to the load from above. As a result, uneven settlement of each step structure 51 is suppressed.

  The position of the step structure 51 of each step shifts in the depth direction of the retaining wall 50 (the natural mountain side), for example, as the upper step structure 51 so that the retaining wall 50 has a shape along the inclined surface 3. ing. That is, the retaining wall 50 has, for example, a shape that is inclined backward to the natural ground side as a whole (see FIG. 1). However, the retaining wall 50 may be constructed by stacking the step structures 51 of each step in the vertical direction.

  Each cell structure 1 is filled with a filling material 8. The filling material 8 is earth and sand such as locally generated soil, crushed stone, sandbag, concrete or mortar.

Here, the middle packing material 8 filled in the cell structure 1 of each stage structure 51 so that the particle size of the filling material 8 filled therein becomes larger in the lower stage structure 51. You may choose the type. Thereby, the lower the retaining wall 50, the better the drainage.
Specifically, the inside of each step structure 51 constituting the lower part of the retaining wall 50 is filled with crushed stone as the filling material 8, and the inside of each step structure 51 constituting the upper part of the retaining wall 50. Can be filled with locally generated soil as the filling material 8.

  Before the retaining wall 50 is constructed, the natural ground is reinforced by the bar-shaped natural ground reinforcing material 100 being embedded in the natural ground in advance.

  The natural ground reinforcing material 100 is embedded in the hole 110 formed in the natural ground. The hole 110 is open to the inclined surface 3. The natural ground reinforcing material 100 is formed in a columnar shape (for example, a cylindrical shape). The natural ground reinforcing material 100 can be disposed so as to be inclined, for example, such that the portion on the inclined surface 3 side (left side in FIG. 1) is high and decreases toward the back side (right side in FIG. 1) of the natural ground. . However, the natural ground reinforcing material 100 may be disposed horizontally. That is, the inclination angle in the longitudinal direction of the natural ground reinforcing material 100 can be, for example, 0 ° or more and 45 ° or less with respect to the horizontal plane.

  The natural ground reinforcing material 100 includes, for example, a core material 120 inserted into the hole 110 and a filling solidified material 130 filled into the hole 110. The filling solidified material 130 is solidified and integrated with the core material 120 and the natural ground around the hole 110.

The core material 120 is, for example, a steel wire, a steel stranded wire, a steel rod such as a reinforcing bar, an FRP (Fiber Reinforced Plastics) rod, or the like.
The filling solidified material 130 is made of a solidified material such as cement milk, resin solidified material, or mortar, for example. Or the filling solidification material 130 may be comprised when the mixture of such a solidification material and excavated earth and sand solidifies.

The core material 120 of the natural ground reinforcing material 100 includes a linear rod-shaped core material 121 arranged along the longitudinal direction of the natural ground reinforcing material 100. It is preferable that the core material 121 is disposed along the central axis of the natural ground reinforcing material 100. The core material 121 is a steel wire, a steel stranded wire, a steel rod such as a reinforcing bar, an FRP rod, or the like.
A part of the core material 121 constitutes a protruding portion 121b protruding from the inclined surface 3. That is, the natural ground reinforcing material 100 has a protruding portion 121 b protruding from the inclined surface 3. The natural ground buried portion 121 a which is the remaining portion of the core material 121 is buried in the hole 110.

  In the case of this embodiment, the protrusion 121b penetrates the retaining wall 50 from the back surface (surface facing the inclined surface 3 side) of the retaining wall 50 to the front surface (surface opposite to the back surface). That is, the tip of the protrusion 121 b protrudes from the retaining wall 50, and the portion other than the tip of the protrusion 121 b is embedded in the retaining wall 50.

  A portion embedded in the retaining wall 50 in the protruding portion 121 b also functions as a reinforcing material that reinforces the retaining wall 50. Therefore, it can be said that a rod-shaped reinforcing material is embedded in the retaining wall 50 and that the reinforcing material and the natural ground reinforcing material 100 are integrally and coaxially arranged with each other.

  A plate-like portion (second plate-like portion) 210 that presses the inclined surface 3 is fixed to the protruding portion 121b. The plate-like portion 210 is disposed along the inclined surface 3. The plate-shaped part 210 is formed in a flat plate shape, for example. Although the material of the plate-shaped part 210 is not specifically limited, For example, the plate-shaped part 210 can be comprised with resin, steel materials, or concrete.

Further, a plate-like portion 220 that presses the retaining wall 50 against the inclined surface 3 side is fixed to the tip portion of the protruding portion 121b. The plate-like portion 220 is the same as the plate-like portion 210. That is, the plate-like part 220 is formed in a flat plate shape, for example. Although the material of the plate-shaped part 220 is not specifically limited, For example, the plate-shaped part 220 can be comprised with resin, steel materials, or concrete. The plate-like portion 220 faces the inclined surface 3 and the plate-like portion 210, for example, in parallel.
Since the plate-like portion 220 is fixed to the distal end portion of the protruding portion 121b, the natural ground reinforcing material 100 is connected to the retaining wall 50.

As shown in FIGS. 3A and 3B, the plate-like portion 210 is in surface contact with the end surface 100 a of the columnar natural ground reinforcing material 100 embedded in the hole 110. The end surface 100a is an end surface of the solidified filling solidified material 130, for example.
Here, the area of the plate-like portion 210 is larger than the area of the end surface 100 a of the natural ground reinforcing material 100, and the portion of the plate-like portion 210 that protrudes around the end surface 100 a presses the inclined surface 3.

  The plate-like portions 210 and 220 are formed with insertion holes (not shown) through which the protruding portions 121 b are inserted, and the protruding portions 121 b are inserted through the insertion holes of the plate-like portions 210 and 220. The plate-like portion 210 is fixed at a predetermined position in the longitudinal direction of the protruding portion 121b by a fixing member 240. Similarly, the plate-like portion 220 is fixed to a predetermined position in the longitudinal direction of the protruding portion 121b by a fixing member 250. For example, a male screw (not shown) is formed on the peripheral surface of the core member 121, and each of the fixing members 240 and 250 is a nut that engages with the male screw on the peripheral surface of the core member 121.

More specifically, for example, with respect to the plate-like portion 210, the fixing member 240 is pressed against the surface of the plate-like portion 210 opposite to the inclined surface 3 side by tightening the fixing member 240. As a result, the plate-like portion 210 is sandwiched and positioned between the fixing member 240 and the end surface 100a and the inclined surface 3 of the natural ground reinforcing material 100.
Further, for the plate-like portion 220, for example, the fixing members 250 are screwed into the protruding portions 121b on both sides of the plate-like portion 220, and the fixing members 250 are tightened in a direction approaching each other. As a result, the plate-like portion 220 is positioned by being sandwiched between the pair of fixing members 250.

  In the example shown in FIGS. 3A and 3B, the area of the plate-like portion 210 is larger than the area of the plate-like portion 220. However, the area of the plate-like portions 210 and 220 is not particularly limited, and the size relationship between the plate-like portion 210 and the plate-like portion 220 is not limited to this example.

  It is preferable that a plurality of natural ground reinforcing materials 100 are embedded in the natural ground protected by the retaining wall 50. Similarly, it is preferable that a plurality of protrusions 121b are embedded in the retaining wall 50 (see FIG. 2). The arrangement of the protruding portions 121b when the retaining wall 50 is viewed from the front can be a houndstooth arrangement (see FIG. 2) or a square arrangement.

  In the retaining wall 50, a rod-shaped retaining wall reinforcing material 300 may be provided separately from the projecting portion 121b.

  The retaining wall reinforcing material 300 includes, for example, a first retaining wall reinforcing material 310 disposed so that the longitudinal direction extends in the vertical direction, and a second retaining wall disposed so that the longitudinal direction extends in the horizontal direction. The reinforcing member 320 includes a connecting member 330 that connects the first retaining wall reinforcing member 310 and the second retaining wall reinforcing member 320 at each other intersection.

  In addition, in FIG. 1 etc., as the 2nd retaining wall reinforcement material 320 extended in a horizontal direction, only the thing extended in the direction away from a natural ground is shown, but in addition to the inclined surface 3 of a natural ground It is preferable to provide the 2nd retaining wall reinforcement 320 extended in parallel with respect (it extends in the depth direction of FIG. 1).

  It is preferable that the first retaining wall reinforcing material 310 is disposed so as to penetrate through the multi-layered step structure 51 adjacent to each other.

  As the first retaining wall reinforcing material 310 and the second retaining wall reinforcing material 320, a steel wire, a steel stranded wire, a steel rod such as a reinforcing bar, an FRP rod, or the like can be used, respectively. As the coupling tool 330, for example, a cross clip can be used.

  The retaining wall reinforcing material 300 contributes to the maintenance of the cell shape of each cell structure 1 and the improvement of the unity between the adjacent stage structures 51.

  In addition, the protrusion part 121b and the retaining wall reinforcement 300 may be mutually connected, and do not need to be connected. When the protrusion 121b and the retaining wall reinforcing member 300 are connected to each other, the stability of the retaining wall 50 and the integrity of the retaining wall 50 and the ground are improved. When the protrusion 121b and the retaining wall reinforcement 300 are not connected to each other, the workability of the retaining wall 50 is good.

  Moreover, you may arrange | position a sheet | seat material (not shown) in the boundary surface of the step structure 51 of an adjacent step | paragraph as needed. This sheet material is preferably water-permeable. Examples of the water-permeable sheet material include those made of a nonwoven fabric or the like, or those having a network structure. Specifically, for example, on the step structure 51 filled with the filling material 8 having a relatively large particle diameter, the step structure 51 filled with the filling material 8 having a relatively small particle diameter is provided. When stacked, a sheet material can be disposed on the boundary surface between these step structures 51. Thereby, it is possible to prevent the filling material 8 having a small particle size from entering the layer filled with the filling material 8 having a large particle size. As a result, the clogging of the layer filled with the medium filling material 8 having a large particle size can be suppressed, and the drainage of the layer can be maintained. In addition, as needed, a cylindrical drainage material, a three-dimensional drainage material, a plate-like drainage material, or a drainage material formed by laminating plate-like drainage materials is arranged at the boundary between adjacent step structure bodies 51. Or may be arranged inside the step structure 51.

  The retaining wall 50 may have a sandbag 63. For example, the sandbag 63 is provided on the uppermost step structure 51 of the retaining wall 50 and is fixed to the step structure 51 by an anchor pin 64. After the installation of the sandbag 63, the top end portion of the retaining wall 50 is formed by filling the filler 5a on the step structure 51 and the upper flat surface 5 on the back side. By providing the sandbag 63, when water such as rain water that has flowed through the top end of the retaining wall 50 flows down from the slope side end portion at the top of the retaining wall 50 along the slope portion, It is possible to prevent the filler 8 from flowing out. In addition, turning up of the step structure 51 when the snow slides down from the slope side end portion at the top end of the retaining wall 50 can be suppressed. Examples of the sandbag 63 include vegetation sandbags for greening or those made by filling a permeable bag with crushed stone as a filling material.

  In order to stabilize the retaining wall 50, for example, the lower portion of the retaining wall 50 is embedded in a groove 61 formed in the ground. That is, the retaining wall 50 is embedded. Specifically, for example, the lowermost step structure 51 of the retaining wall 50 is embedded in the groove 61. The side surface of the lowermost stage structure 51 is supported by the side wall of the groove 61.

  Hereinafter, with reference to FIG. 4 etc., the construction method of the retaining wall which concerns on this embodiment is demonstrated.

  Here, an example in which the retaining wall 50 is constructed along the inclined surface 3 will be described.

  First, as shown in FIG. 4A, the natural ground is reinforced by embedding a natural ground reinforcing material 100 in the natural ground.

  Specifically, first, a hole 110 that opens to the inclined surface 3 is formed in the natural ground using a drill or the like. Next, the core material 120 (including the core material 121) is inserted into the hole 110. Next, the filled solidified material 130 is filled into the hole 110, and the filled solidified material 130 is solidified. Thereby, the natural ground reinforcing material 100 can be formed.

  While the core material 120 and the filling solidified material 130 are integrated, the ground solid is reinforced by the natural ground reinforcing material 100 by integrating the filled solidifying material 130 and the natural ground around the hole 110.

  Here, the natural ground reinforcing material 100 is embedded in the natural ground so that a part of the natural ground reinforcing material 100 becomes the protruding portion 121b protruding from the inclined surface 3. That is, the core material 121 is inserted into the hole 110 so that a part of the core material 121 in the longitudinal direction becomes a protruding portion 121 b protruding from the inclined surface 3.

The filling solidified material 130 is made of a solidified material such as cement milk, resin solidified material, or mortar, for example.
Or the filling solidification material 130 may be comprised when the mixture of such a solidification material and excavated earth and sand solidifies. In this case, after excavating and stirring the ground using a hollow stirring rod (not shown), the solidified material is discharged from the hollow stirring rod and the like, and then the core material 120 is inserted into the mixture of the solidified material and the excavated earth and sand. And the natural ground reinforcement 100 can be formed by solidifying a solidification material.
As described above, the order of performing the step of inserting the core material 120 into the hole 110 and the step of filling (and solidifying) the filling solidified material 130 into the hole 110 may be first. Further, the step of forming the hole 110 and the step of filling the filled solid material 130 into the hole 110 may be performed in parallel.

  As described above, the step of reinforcing the natural ground by embedding the rod-shaped ground reinforcing material 100 in the natural ground includes the step of forming the hole 110 opened in the inclined surface 3 in the natural ground, and the rod-shaped core material 121. Including a step of inserting the core material 121 into the hole portion 110 so that a part of the protrusion portion 121b protrudes from the inclined surface 3 and becomes a protrusion portion 121b, and a step of filling the hole portion 110 with the filling solidified material 130.

  As shown in FIG. 4A, at the stage where the natural ground reinforcing material 100 is embedded in the natural ground, the natural ground embedded portion 121 a of the core material 121 is embedded in the natural ground, and the protruding portion 121 b protrudes from the inclined surface 3. It becomes a state.

  Moreover, the plate-like part 210 which presses down the inclined surface 3 is fixed to each protrusion part 121b. That is, the protruding portion 121 b is inserted into the plate-like portion 210 and the plate-like portion 210 is fixed by the fixing member 240. The plate-like portion 210 may be fixed to the projecting portion 121b every time each individual ground reinforcing material 100 is embedded in the natural ground, or after all the natural ground reinforcing materials 100 are embedded in the natural ground. Also good.

  In the state where the natural ground is reinforced by the natural ground reinforcing material 100 as described above, the retaining wall 50 can be easily constructed along the inclined surface 3.

  Next, the retaining wall 50 is constructed as shown in FIG. The retaining wall 50 is constructed in such a manner that the tip of the protruding portion 121b protrudes from the retaining wall 50 and a portion other than the tip of the protruding portion 121b is embedded in the retaining wall 50.

  First, a flat groove 61 is formed at a location adjacent to the inclined surface 3 on the lower flat surface 4. The groove 61 extends along the lower end portion of the inclined surface 3 (extends in the depth direction of FIG. 4B and FIG. 1).

  Next, the lowermost step structure 51 is formed in the groove 61.

  In order to form the stage structure 51 of each stage, first, a plurality of cell assemblies 2 constituting the stage structure 51 are expanded, and these cell assemblies 2 are arranged in a horizontal direction. At this time, the plurality of cell assemblies 2 are arranged such that the spaces formed between the pair of strips 11 and 12 constituting each cell structure 1 of each cell assembly 2 are open in the vertical direction. Place. In addition, the horizontal direction said here is not necessarily limited to the direction along a horizontal surface exactly | strictly. The horizontal direction mentioned here may be a substantially horizontal direction (lateral direction), and may be a direction inclined to the extent that the retaining wall 50 can be stably formed by the step structure 51.

  Next, among the cell structures 1 positioned at the ends of the cell assemblies 2 adjacent in the horizontal direction (ends in the direction of arrow B in FIGS. 5 and 6), the cell structures 1 corresponding to each other are mutually connected. Link. That is, among the cell structures 1 included in the cell assembly 2, each of the plurality of cell structures 1 located at the end in the arrow B direction, and the corresponding cell structure 1 of the adjacent cell assembly 2, Are interconnected individually.

  A method for connecting the cell structures 1 to each other is not particularly limited. However, it is preferable to connect the cell structures 1 to each other by using a resin connector or a connector made of a composite material containing a resin so that corrosion in the soil is suppressed. As a suitable example of such a connection tool, a binding band or a string-like body connected by binding the cell structures 1 to each other can be cited. Examples of the string-like body include a stranded wire of a synthetic fiber or a stranded wire of a synthetic fiber and a fine metal wire.

  When all the cell structures 1 of the adjacent cell aggregates 2 are connected to each other, each cell structure 1 is filled with a filling material 8 such as earth and sand or crushed stone and compacted.

  Here, the width of the retaining wall 50 (the dimension in the left-right direction in FIG. 2 and the dimension in the depth direction in FIGS. 1 and 4B) is adjusted to an arbitrary dimension according to the width of the inclined surface 3. According to the width of the retaining wall 50, the number of cell assemblies 2 arranged side by side in the width direction of the retaining wall 50 is adjusted. By connecting all the cell assemblies 2 aligned in the width direction of the retaining wall 50 and filling the cell structure 1 of each cell assembly 2 with the filling material 8, a one-stage stage structure 51 is formed.

Thereafter, the step structures 51 of each step are sequentially stacked. The necessary number of step structures 51 are stacked until the upper surface of the uppermost step structure 51 is substantially flush with the upper flat surface 5. Thereby, the retaining wall 50 can be constructed.
Thus, in the step of constructing the retaining wall 50, the step of arranging the cell assembly 2 such that the space formed between the pair of strips 11 and 12 is open in the vertical direction, and the cell The step structure 51 of each step is formed through the step of filling the cell structure 1 of the assembly 2 with the filling material 8.
By shifting the upper stage structure body 51 toward the natural mountain side, the portion of the retaining wall 50 made of the laminated structure of the stage structure body 51 can be constructed in a shape inclined along the inclined surface 3.

  Here, the cell aggregate 2 constituting the stage structure 51 of each stage needs to be arranged while avoiding interference with the protruding part 121b. Therefore, if necessary, an insertion hole (not shown) for inserting the protruding portion 121b is formed in the strip material 7 constituting each cell assembly 2, and the protruding portion 121b is inserted into the insertion hole. However, each cell assembly 2 is arranged. In this case, the protrusion 121b is engaged with the portion around the insertion hole in the strip material 7, whereby the protrusion 121b and the cell assembly 2 are connected to each other, and the protrusion 121b and the cell assembly 2 are connected. , And by extension, the integrity of the natural ground and the retaining wall 50 is improved.

  By filling the filling material 8 into the cell structure 1 of the cell assembly 2 through which the protrusion 121 b is inserted, the protrusion 121 b is embedded in the step structure 51 including the cell assembly 2. By constructing the step structure 51 of each step, each protruding portion 121b is embedded in the retaining wall 50 except for the tip portion. The retaining wall 50 is reinforced by the protrusions 121b.

  Here, it is preferable that each protrusion 121b penetrates the multi-layered step structure 51 adjacent to each other. That is, it is preferable to construct the retaining wall 50 so that each protruding part 121b penetrates the multi-layered step structure 51 adjacent to each other.

  A plate-like portion 220 that presses the retaining wall 50 against the inclined surface 3 is fixed to the tip of each protruding portion 121b. That is, the tip portion of the protruding portion 121 b is inserted into the plate-like portion 220, and the plate-like portion 220 is fixed by the fixing member 250. The plate-like portion 220 may be fixed to the projecting portion 121b every time construction of the step structure 51 corresponding to the tip of each projecting portion 121b is completed in the retaining wall 50, or all the step structure bodies. It may be performed after the construction of 51 is completed.

Further, in the retaining wall 50, a rod-shaped retaining wall reinforcing material 300 may be provided separately from the projecting portion 121b. That is, in the step of constructing the retaining wall 50, the retaining wall 50 may be constructed such that the rod-shaped retaining wall reinforcing material 300 is embedded in the retaining wall 50.
For example, as the retaining wall reinforcement member 300, a first retaining wall reinforcement member 310 that extends in the vertical direction and a second retaining wall reinforcement member 320 that extends in the horizontal direction are used. And the second retaining wall reinforcement member 320 can be connected to each other by the connecting tool 330.
The construction of the first retaining wall reinforcing material 310, the second retaining wall reinforcing material 320, and the coupler 330 constituting the retaining wall reinforcing material 300 is performed as needed in the process of constructing the retaining wall 50.

  In addition, the protrusion part 121b and the retaining wall reinforcing material 300 may be connected to each other or may not be connected.

  Moreover, it is preferable to fill the gap 6 between the inclined surface (surface to be reinforced) 3 and the retaining wall 50 with mortar or concrete 6a. By doing in this way, the integrity of the retaining wall 50 and the natural ground can be improved. More specifically, for example, every time the step structure 51 is stacked one stage, the gap between the inclined surface 3 and the step structure 51 is filled with mortar or concrete 6a, whereby the inclined surface 3 and the retaining wall 50 are separated. The gap 6 can be filled with mortar or concrete 6a.

  When the construction of the step structure 51 is completed up to the uppermost stage, a sandbag 63 is arranged on the uppermost stage structure 51, and the sandbag 63 is fixed to the stage structure 51 by an anchor pin 64. Thereafter, the filler 5 a is filled on the step structure 51 and the upper flat surface 5 on the back side of the sandbag 63. Thereby, the top end part of the retaining wall 50 can be formed.

  In this way, the retaining wall structure shown in FIG. 1 can be constructed.

According to the first embodiment as described above, the retaining wall construction method includes the step of reinforcing the natural ground by embedding the rod-shaped natural ground reinforcing material 100 in the natural ground, and the natural ground reinforcing material 100 Constructing the retaining wall 50 to be coupled to the wall 50.
Since the natural ground reinforcing material 100 is a rigid body, the natural ground reinforcing material 100 can effectively stabilize the natural ground. And since the retaining wall 50 is constructed in a state in which the natural ground is reinforced by the rod-shaped ground reinforcing material 100, the retaining wall 50 can be constructed easily and stably.
In addition, since the natural ground reinforcing material 100 is connected to the retaining wall 50, the integrity of the retaining wall 50 and the natural ground can be secured, and the retaining wall 50 can be further stabilized.
In addition, since the retaining wall 50 can be constructed after reinforcing the natural ground with the rod-shaped natural ground reinforcing material 100, the retaining wall 50 is arranged along the natural ground where the inclination angle of the inclined surface 3 is closer to the vertical. Can be built. By doing in this way, compared with the case where the inclination angle of the inclined surface 3 is loose, the land can be effectively used.

Further, in the step of reinforcing the natural ground, the natural ground reinforcing material 100 is embedded in the natural ground so that a part of the natural ground reinforcing material 100 becomes the protruding portion 121b protruding from the inclined surface 3.
The step of constructing the retaining wall 50 constructs the retaining wall 50 so that the tip of the protruding portion 121b protrudes from the retaining wall 50 and a portion other than the tip of the protruding portion 121b is embedded in the retaining wall 50. And a step of fixing the plate-like portion 220 that presses the retaining wall 50 to the inclined surface 3 side to the tip portion of the protruding portion 121b.
Therefore, the natural ground reinforcing material 100 can be connected to the retaining wall 50 by the protruding portion 121 b and the plate-like portion 220. Since the protrusion 121b and the natural ground reinforcing material 100 are integral, good integrity between the retaining wall 50 and the natural ground reinforcing material 100, and hence good integrity between the retaining wall 50 and the natural ground, are obtained.
Moreover, the stability of the retaining wall 50 can be improved by pressing the retaining wall 50 against the inclined surface 3 side by the plate-like portion 220.
Moreover, since the rod-shaped protrusion 121b is embedded in the retaining wall 50, the retaining wall 50 can be reinforced by the protrusion 121b itself. Since the protrusion 121b is a rigid body, the retaining wall 50 can be effectively reinforced by the protrusion 121b.

  In addition, the step of reinforcing the natural ground includes the step of fixing the plate-like portion 210 that presses the inclined surface 3 to the protruding portion 121b, so that the stability of the natural ground can be improved by the plate-like portion 210.

  Further, the step of reinforcing the natural ground includes the step of forming the hole 110 opened in the inclined surface 3 in the natural mountain, and the core so that a part of the rod-shaped core 121 protrudes from the inclined surface 3 to become the protruding portion 121b. A step of inserting the material 121 into the hole 110 and a step of filling the solidified material 130 into the hole 110. Therefore, the natural ground can be reinforced by the natural ground reinforcing material 100 having a structure including the core material 120 and the filling solidified material 130.

  Further, in the step of constructing the retaining wall 50, the retaining wall 50 is constructed such that the protruding portion 121b penetrates the multi-layered step structure 51 adjacent to each other. Thereby, the multi-layered step structures 51 adjacent to each other can be coupled to each other via the protruding portion 121b, so that the integrity of the multi-layered step structures 51 adjacent to each other can be improved.

  In the step of constructing the retaining wall 50, the retaining wall 50 is constructed by the rigid retaining wall reinforcing material 300 by constructing the retaining wall 50 so that the rod-shaped retaining wall reinforcing material 300 is embedded in the retaining wall 50. Can be reinforced.

  As the retaining wall reinforcing member 300, a first retaining wall reinforcing member 310 extending in the vertical direction and a second retaining wall reinforcing member 320 extending in the horizontal direction are used. By connecting the two retaining wall reinforcement members 320 to each other by the coupler 330, the entire integrity of the retaining wall reinforcement member 300 can be obtained, and the retaining wall 50 can be favorably reinforced by the retaining wall reinforcement member 300. be able to.

  In addition, by filling the gap 6 between the inclined surface 3 and the retaining wall 50 with mortar or concrete 6a, the integrity of the retaining wall 50 and the natural ground can be improved.

  Here, every time the step structure 51 is laminated, the mortar in the gap 6 between the inclined surface 3 and the retaining wall 50 is filled by filling the gap 6 between the inclined surface 3 and the retaining wall 50 with mortar or concrete 6a. Or the filling property (filling rate) of the concrete 6a can be made favorable.

  In the step of reinforcing the natural ground, the retaining wall 50 can be more easily constructed by reinforcing the natural ground so that the safety factor of the natural ground is 1.0 or more.

In addition, the retaining wall structure according to the present embodiment includes a bar-shaped ground reinforcing material 100 that is embedded in a natural ground and reinforces the natural ground, and the natural ground reinforcing material 100 is connected to the retaining wall 50. .
Since the natural ground reinforcement 100 is a rigid body, the natural ground is effectively stabilized by the natural ground reinforcement 100. In addition, since the natural ground reinforcing material 100 is connected to the retaining wall 50, good integrity between the retaining wall 50 and the natural ground can be obtained, and a retaining wall structure in which the retaining wall 50 and the natural ground have high stability can be obtained. realizable.

[Second Embodiment]
FIG. 7 is a partially enlarged view showing the retaining wall structure according to the second embodiment, in which FIG. 7 (a) is a plan view, and FIG. 7 (b) is along the AA line of FIG. 7 (a). FIG. The retaining wall structure and retaining wall construction method according to the present embodiment are different from the retaining wall structure and retaining wall construction method according to the first embodiment described above in the points described below. This is the same as the retaining wall structure and retaining wall construction method according to the first embodiment.

In the first embodiment, as illustrated in FIGS. 3A and 3B, the example in which the area of the plate-like portion 210 is larger than the area of the plate-like portion 220 has been described. On the other hand, in the present embodiment, the area of the plate-like portion 210 and the area of the plate-like portion 220 are equal to each other (equal to each other).
According to the second embodiment as described above, the same effect as that of the first embodiment can be obtained.

[Third Embodiment]
FIG. 8 is a partially enlarged view showing the retaining wall structure according to the third embodiment, in which FIG. 8 (a) is a plan view, and FIG. 8 (b) is along the AA line of FIG. 8 (a). FIG. The retaining wall structure and retaining wall construction method according to the present embodiment are different from the retaining wall structure and retaining wall construction method according to the first embodiment described above in the points described below. This is the same as the retaining wall structure and retaining wall construction method according to the first embodiment.

In the first embodiment, as shown in FIGS. 3A and 3B, the protruding portion 121 b protrudes from the front surface of the retaining wall 50, and the plate-shaped portion 220 inclines the front surface of the retaining wall 50. The example which pressed down to the surface 3 side was demonstrated. On the other hand, in the present embodiment, the protruding portion 121 b is embedded in the retaining wall 50 and does not protrude from the retaining wall 50, and the plate-shaped portion 220 is also embedded in the retaining wall 50.
That is, in the retaining wall structure according to the present embodiment, a part of the natural ground reinforcing material 100 is a protruding portion 121b protruding from the inclined surface 3, and a plate-like portion facing the inclined surface 3 is provided at the tip of the protruding portion 121b. 220 is fixed, and the protruding portion 121 b and the plate-like portion 220 are embedded in the retaining wall 50. In the case of this embodiment, the natural ground reinforcing material 100 is connected to the retaining wall 50 by the projecting portion 121 b and the plate-like portion 220 being embedded in the retaining wall 50.
The plate-like portion 220 and the fixing member 250 are preferably arranged so as not to interfere with the cell assembly 2. That is, it is preferable that the plate-like portion 220 and the fixing member 250 are arranged in any one of the cell structures 1 or between any one of the plurality of adjacent cell assemblies 1.

  In the retaining wall construction method according to the present embodiment, in the step of reinforcing the natural ground, the natural ground reinforcing material 100 is placed in the natural ground so that a part of the natural ground reinforcing material 100 becomes the protruding portion 121b protruding from the inclined surface 3. The step of constructing the retaining wall 50 is embedded in the step of fixing the plate-like portion 220 facing the inclined surface 3 to the tip of the protruding portion 121b, and the protruding portion 121b and the plate-like portion 220 in the retaining wall 50. Building the retaining wall 50 to be buried.

According to the third embodiment as described above, the same effect as that of the first embodiment can be obtained.
Moreover, since the protrusion part 121b and the plate-shaped part 220 are embed | buried in the retaining wall 50, it can be set as the structure without a protrusion in the front surface of the retaining wall 50. FIG. Moreover, since the operation | work which penetrates the protrusion part 121b to the cell assembly 2 becomes easy compared with 1st Embodiment, the workability | operativity of the retaining wall 50 improves.

[Fourth Embodiment]
FIG. 9 is a side sectional view of the retaining wall structure according to the fourth embodiment. The retaining wall structure and retaining wall construction method according to the present embodiment are different from the retaining wall structure and retaining wall construction method according to the first embodiment described above in the points described below. This is the same as the retaining wall structure and retaining wall construction method according to the first embodiment.

  In the first embodiment, the first retaining wall reinforcement 310 and the second retaining wall reinforcement 320 of the retaining wall reinforcement 300 are steel wires, steel strands, steel bars such as reinforcing bars, FRP rods, and the like. The example in which the first retaining wall reinforcement 310 and the second retaining wall reinforcement 320 are connected by the connector 330 has been described.

On the other hand, in the present embodiment, the retaining wall reinforcing material 300 is made of H steel. In addition, in the example of FIG. 9, although the 1st retaining wall reinforcement material 310 which consists of H steel is shown vertically, the 2nd retaining wall reinforcement material (not shown) which consists of H steel is further shown horizontally. It may be arranged.
Further, the retaining wall reinforcing material 300 made of H steel and the retaining wall reinforcing material 300 made of a steel wire, a steel stranded wire, a steel rod such as a reinforcing bar, an FRP rod or the like may coexist.

  In the case of the present embodiment, the gap 6 between the inclined surface 3 and the retaining wall 50 is filled with crushed stone 6b, and the top of the crushed stone 6b is filled with concrete or mortar. A seal portion 6c is formed.

  According to the fourth embodiment as described above, the same effect as that of the first embodiment can be obtained.

[Fifth Embodiment]
FIGS. 10A and 10B are views for explaining a series of steps of the retaining wall construction method according to the fifth embodiment. 10A is a cross-sectional view, and FIG. 10B is a perspective view of the vicinity of the connecting portion between the retaining wall side core member 140 and the core member 121. The retaining wall structure and retaining wall construction method according to the present embodiment are different from the retaining wall structure and retaining wall construction method according to the first embodiment described above in the points described below. This is the same as the retaining wall structure and retaining wall construction method according to the first embodiment.

  In the first embodiment, the example in which the protruding portion 121b of the core member 120 penetrates the retaining wall 50 and reinforces the retaining wall 50 has been described. On the other hand, in this embodiment, the protrusion 121b does not penetrate the retaining wall 50. Instead, the retaining wall side core member 140 is connected to the core member 120 so as to be positioned coaxially with the core member 120, and the retaining wall 50 is reinforced by the retaining wall side core member 140.

  The retaining wall side core member 140 is, for example, a steel wire, a steel stranded wire, a steel rod such as a reinforcing bar, an FRP rod, or the like, similarly to the core member 120.

  As shown in FIG. 10B, the retaining wall side core member 140 and the protruding portion 121b of the core member 120 are connected using a fixing member 240 that is a nut. That is, the outer peripheral surface of the end portion of the retaining wall side core member 140 and the outer peripheral surface of the projecting portion 121 b are respectively formed into male threads, and the end portion of the retaining wall side core member 140 and the projecting portion 121 b are connected to the fixing member 240. The retaining wall side core member 140 and the core member 120 can be coaxially connected to each other by screwing into the fixing member 240 from both sides.

  Furthermore, in this embodiment, the plate unit 200 is used to position the core member 120 at the center of the hole 110.

  Each of FIGS. 11A to 11D is a diagram illustrating an example of the plate unit 200. The plate unit 200 includes the plate-like portion 210 described in the first embodiment and a guide portion 230 that is inserted into the hole portion 110. In the center of the plate-like portion 210, an insertion hole 211 through which the protruding portion 121b is inserted is formed through the front and back of the plate-like portion 210. The outer diameter of the guide 230 is set to be approximately equal to the inner diameter of the hole 110 formed in the natural ground.

  11 (a) and 11 (b), the guide part 230 is a guide pipe made of an SGP steel pipe or the like, and one end thereof is fixed to one surface of the plate-like part 210 by welding or the like. Yes. In FIG. 11A, the guide portion 230 is made of a straight tube and can be fixed more firmly to the hole portion 110. On the other hand, in the example of FIG. 11B, the other end portion of the guide portion 230 is cut obliquely to form a taper shape, and can be smoothly inserted into the hole portion 110.

  In the example of FIG. 11C, the guide part 230 is composed of a reinforcing bar wound spirally, that is, a spiral bar. In the example of FIG. 11D, the guide unit 230 includes a plurality of (for example, four) guide pieces 231 that are evenly arranged along a virtual cylindrical circumferential surface. In the example of FIG. 11D, the outer diameter of the guide portion 230 is a virtual cylindrical outer diameter. In the examples of FIGS. 11C and 11D, a material cost reduction effect can be expected as compared with the examples of FIGS. 11A and 11B.

  Hereinafter, the construction method of the retaining wall in the case of this embodiment is demonstrated.

  After the hole 110 is formed in the natural ground as in the first embodiment, the core material 120 (including the core material 121) is inserted into the hole 110. Next, the filling portion 130 is filled into the hole 110. Further, the protruding part 121 b of the core member 121 is inserted into the insertion hole 211 of the plate-like part 210 of the plate unit 200, and the guide part 230 of the plate unit 200 is inserted into the hole part 110. Thereby, the core material 121 can be positioned at the center of the hole 110. Thereafter, the filling solidified material 130 is solidified. Thereby, the natural ground reinforcing material 100 can be formed.

  Further, the retaining wall side core member 140 is connected to the protruding portion 121 b of the core member 121 using the fixing member 240. In addition, the direction of the spiral of the external thread formed on the retaining wall side core member 140 and the protrusion so that the retaining wall side core member 140 and the protruding portion 121b can be connected by rotating the fixing member 240 around the axis in one direction. It is also preferable to set the direction of the spiral of the male screw formed in the part 121b to be opposite to each other. The fixing member 240 can be tightened using a torque wrench, chain wrench, wrench, hydraulic jack, or the like. Alternatively, the fixing member 240 may be tightened using an impact wrench, an electric hydraulic jack, or the like.

  Thereafter, the retaining wall 50 is constructed in the same manner as in the first embodiment. Thereby, the retaining wall structure which concerns on this embodiment is obtained.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, by using the plate unit 200, the core member 121 can be easily positioned at the center of the hole 110. In addition, since the retaining wall side core member 140 that reinforces the retaining wall 50 is provided by adding to the core member 121 that reinforces the natural ground, there is no need to handle and transport a long core member. , Transportation workability is improved.

  In each of the above-described embodiments, the example in which the retaining wall 50 is inclined has been described. However, the retaining wall 50 may be upright, or may be constructed with a steep slope close to upright. By constructing the retaining wall 50 after reinforcing the natural ground with the natural ground reinforcing material 100 as described above, it is possible to easily and stably construct the upright retaining wall 50 or the steep retaining wall 50 close to the upright. Can do.

  In the first to fourth embodiments, the plate unit 200 described in the fifth embodiment may be used instead of the plate-like portion 220.

1 Cell structure 2 Cell assembly 3 Inclined surface (surface to be reinforced)
4 Lower flat surface 5 Upper flat surface 5a Filler 6 Crevice 6a Mortar or concrete 6b Crushed stone 6c Sealing portion 7 Strip material 8 Filling material 11, 12 Band 13 Joint portion 50 Retaining wall 51 Step structure 61 Groove 63 Dirt 64 Anchor pin 100 Ground mountain reinforcing material 100a End face 110 Hole portion 120 Core material 121 Rod-shaped core material 121a Ground mountain embedded portion 121b Protruding portion 130 Filling solidified material 140 Retaining wall side core material 200 Plate unit 210 Plate-shaped portion 211 Insertion hole 220 First Two plate-like parts 230 Guide part 231 Guide piece 240 Fixing member 250 Fixing member 300 Retaining wall reinforcing material 310 First retaining wall reinforcing material 320 Second retaining wall reinforcing material 330 Connecting tool

Claims (17)

A method of constructing a retaining wall along the surface to be reinforced of the natural ground by laminating stepped structures in multiple stages,
The step structure of each step is a cell assembly made up of a plurality of flexible cell structures arranged in a honeycomb shape and integrated with each other, and each cell structure of the cell assembly is filled. And a filling material,
The construction method is
Reinforcing the natural ground by embedding a rod-shaped natural ground reinforcing material in the natural ground;
Constructing the retaining wall such that the natural ground reinforcement is coupled to the retaining wall;
Retaining wall construction method including In the step of reinforcing the natural ground, the natural ground reinforcing material is embedded in the natural ground so that a part of the natural ground reinforcing material becomes a protruding portion protruding from the surface to be reinforced,
The step of constructing the retaining wall includes
Constructing the retaining wall such that a tip portion of the projecting portion projects from the retaining wall and a portion other than the tip portion of the projecting portion is embedded in the retaining wall;
Fixing the plate-like portion that presses the retaining wall against the reinforcement target surface side to the tip of the protruding portion;
The construction method of the retaining wall of Claim 1 containing this. In the step of reinforcing the natural ground, the natural ground reinforcing material is embedded in the natural ground so that a part of the natural ground reinforcing material becomes a protruding portion protruding from the surface to be reinforced,
The step of constructing the retaining wall includes
Fixing the plate-like portion facing the reinforcement target surface to the tip of the protruding portion;
Constructing the retaining wall such that the protruding portion and the plate-like portion are embedded in the retaining wall;
The construction method of the retaining wall of Claim 1 containing this.   The method of constructing a retaining wall according to claim 2 or 3, wherein the step of reinforcing the natural ground further includes a step of fixing a second plate-like portion that presses the surface to be reinforced to the protruding portion. The step of reinforcing the ground is as follows:
Forming a hole opening in the surface to be reinforced in the natural ground;
Inserting the core material into the hole so that a part of the rod-shaped core material protrudes from the surface to be reinforced and becomes the protruding portion;
Filling the hole with a filling solidifying material;
The construction method of the retaining wall as described in any one of Claims 2 thru | or 4 containing these.   The retaining wall according to any one of claims 1 to 5, wherein, in the step of constructing the retaining wall, the retaining wall is constructed such that the protruding portion penetrates the plurality of layers of the step structures adjacent to each other. Wall construction method.   The construction of the retaining wall according to any one of claims 1 to 6, wherein, in the step of constructing the retaining wall, the retaining wall is constructed so that a rod-shaped retaining wall reinforcing material is embedded in the retaining wall. Construction method.   As the retaining wall reinforcing material, a first retaining wall reinforcing material extending in the vertical direction and a second retaining wall reinforcing material extending in the horizontal direction are used, and the first retaining wall reinforcing material and the second retaining wall material are used. The construction method of the retaining wall according to claim 7, wherein the retaining wall reinforcing material is connected to each other by a connector.   The construction method of the retaining wall as described in any one of Claims 1 thru | or 8 including the process of filling the clearance gap between the said reinforcement object surface and the said retaining wall with mortar or concrete.   The construction method of the retaining wall according to claim 9, wherein the mortar or the concrete is filled in a gap between the surface to be reinforced and the stepped structure every time the stepped structure is stacked one step.   The method for constructing a retaining wall according to any one of claims 1 to 10, wherein, in the step of reinforcing the natural ground, the natural ground is reinforced so that a safety factor of the natural ground is 1.0 or more. Each of the cell structures is formed by a pair of flexible strips,
The pair of strips are integrated by being joined to each other at joints arranged at both ends in the longitudinal direction to form the cell structure,
In the step of constructing the retaining wall,
Arranging the cell aggregate so that the space formed between the pair of belt-like bodies is in an attitude in which each space is opened in the vertical direction;
Filling each cell structure of the cell assembly with a filling material;
The construction method of the retaining wall as described in any one of Claims 1 thru | or 11 which forms the said step structure body of each step through. The cell assembly includes three or more strip members arranged in parallel to each other, and a pair of strip members adjacent to each other is mutually connected at each of joint portions arranged at regular intervals in the longitudinal direction. Each of the cell structures by the pair of strip members in a range from one of the joints to another joint located next to the one joint in the longitudinal direction of the pair of strip members. The body is composed,
Among the strip materials, the first strip material and the second strip material adjacent to each other are joined to each other at each of the first joint portions arranged at regular intervals in the longitudinal direction thereof,
The second strip material and the third strip material adjacent to the second strip material on the opposite side of the first strip material are arranged at regular intervals in the longitudinal direction thereof. Bonded to each other in each of the second joints,
The position of each 2nd junction part in the arrangement direction of the said 2nd junction part is set to the intermediate position of the said 1st junction part adjacent, The retaining wall as described in any one of Claims 1 thru | or 12 Construction method. A retaining wall structure including a retaining wall constructed along a reinforcement target surface of a natural ground by laminating a step structure in a plurality of stages,
The step structure of each step is a cell assembly made up of a plurality of flexible cell structures arranged in a honeycomb shape and integrated with each other, and each cell structure of the cell assembly is filled. And a filling material,
The retaining wall structure is
It has a rod-shaped natural ground reinforcing material that is embedded in the natural ground and reinforces the natural ground,
A retaining wall structure in which the natural ground reinforcement is connected to the retaining wall. A part of the natural ground reinforcing material is a protruding portion protruding from the surface to be reinforced,
A tip portion of the protruding portion protrudes from the retaining wall, and a portion other than the tip portion in the protruding portion is embedded in the retaining wall,
The retaining wall structure according to claim 14, wherein a plate-like portion that presses the retaining wall against the reinforcement target surface side is fixed to the tip portion of the projecting portion. A part of the natural ground reinforcing material is a protruding portion protruding from the surface to be reinforced,
A plate-like portion facing the reinforcement target surface is fixed to the tip of the protruding portion,
The retaining wall structure according to claim 14, wherein the protruding portion and the plate-shaped portion are embedded in the retaining wall.   The retaining wall structure according to claim 15 or 16, wherein a second plate-like portion that presses against the reinforcement target surface is fixed to the protruding portion.

Images