JP2003166243A - Construction method of reinforcing earth cast-in-place wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the mutual relation with the adjacent structure having a perpendicular wall face and prevent vegetation on a slope face from growing thickly and secure stability against earthquakes or the like. <P>SOLUTION: A slope face member is laid on the ground and the other end side of a netting structure of which one end side is connected to the slope face member is developed in the direction separating from the slope face member and installed on the ground. Fill is charged in the rear face side of the slope face member and on the upper side of the netting structure and rolled to construct a first soil layer. The slope face member and the netting structure is placed on the first soil layer and the fill is charged and rolled. In this way, the second soil layer and the following layers are constructed upwards in sequence to form a reinforcing soil. A resistance member is embedded to be substantially parallel with the slope face. The other end side of a tensile member of which one side end is connected to the resistance member is projected out of the slope face and connected to a joint member. A wall member covering the slope face of the reinforcing soil is placed to embed the joint member and construct the cast-in-place wall. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a cast-in-place reinforced soil wall, and more particularly to a method for constructing a reinforced soil cast-in-place wall, which can simplify connection with an adjacent structure having a vertical wall surface. Field of the Invention The present invention relates to a method for constructing a reinforced soil cast-in-place wall capable of preventing the overgrowth of vegetation on the surface and ensuring stability against earthquakes and the like. 2. Description of the Related Art Conventionally, when constructing a structure by embankment, a slope material or a sandbag is used as a slope member, and an embankment is put on the back side of the slope member to steep the slope. There is a construction method of constructing a reinforcing wall having a steep wall surface where the slope is greened with vegetation. [0003] Further, in the construction of a conventional embankment structure, a rigid integral wall work and a net-like member having one end connected to the wall are used to fill the embankment into the back of the wall. There is a construction method of burying a net-like member and constructing an anti-earth pressure structure having a vertical wall surface. [0004] However, in the method of constructing a steeply reinforced wall for greening the slope with vegetation using a slope material or sandbag, the vegetation is growing on the slope. There is a problem that requires long-term maintenance
There is a problem that complicated processing is required for the connection with the adjacent vertical wall structure. Further, in a construction method of constructing a vertical anti-earth pressure structure using a rigid integral wall work and a net-like member, consideration is given to the wall work being integrated with the embankment reinforcing material and the temporary holding material. There is a problem that it is necessary to perform a well-constructed construction, there is a problem that it is not possible to quantitatively evaluate the integrity of the wall work and the embankment reinforcing material, and to use the integrated wall work, lay the planar reinforcement densely in the vertical direction There is a need. Further, in the conventional construction of the embankment, if a reinforced earth wall having a precast wall surface is constructed on a soft ground or an arch culvert pit where large uneven settlement is caused by an embankment load, cracks or breakage on the precast wall surface will occur. May occur. When the unequal settlement is large as described above, it is desirable to construct a steep slope or a vertical slope by a method frame material having a good deformation followability or a reinforced soil wall using a sandbag and a mesh member. [0007] In order to eliminate the above-mentioned disadvantages, the present invention provides a net-like member having a slope member installed on the ground and one end connected to the slope member. The end side is stretched in the direction away from the slope member and installed on the ground, and the first soil layer is constructed by charging and rolling an embankment on the back side of the slope member and the upper side of the mesh member. The slope member and the net-like member are placed above the first soil layer, and the embankment is charged and rolled to construct the second and subsequent soil layers sequentially upward to form a reinforced soil. A resistance member is buried in the embankment substantially in parallel with the slope, and the other end of the tensile member having one end connected to the resistance member is projected from the slope of the reinforcing soil to connect the connection member. Wall material for covering the slope of the reinforced soil so as to bury a connecting member And a cast-in-place wall is constructed. [0008] A method for constructing a reinforced soil cast-in-place wall according to the present invention comprises installing a slope member and a mesh member having one end connected to the slope member on the ground, The first soil layer is constructed by charging and compacting the embankment on the back side and the upper side of the mesh member, and the second and subsequent soil layers are sequentially constructed upward on the first soil layer to form the reinforcing soil. The resistance member is buried in the embankment of the reinforcing soil, and the other end of the tensile member having one end connected to the resistance member is projected from the slope of the reinforcing soil to connect the connecting member. By embedding the wall material that covers the slope of the reinforced soil so that the members are buried after the deformation of the embankment has converged and constructing a cast-in-place wall, the reinforced soil using a net-like member that is highly deformable Cracks due to uneven settlement of cast-in-place walls with steep or vertical slopes And can be built without any damage
Simplify the interaction with the reinforcing soil, which is an adjacent structure with vertical walls, prevent the growth of vegetation from the slope, and eliminate the need for long-term maintenance of vegetation. In addition, since the constant earth pressure is stable as the reinforcing soil, the stability of the cast-in-place wall in an earthquake or the like can be secured by the pull-out resistance of the resistance member, and by using the connecting member and the resistance member. The stability of the cast-in-place wall can be evaluated quantitatively.
There is no need to densely lay planar reinforcing materials in the vertical direction of the slope to integrate the reinforced soil and the cast-in-place wall, and the volume of the cast-in-place wall can be reduced. The force can be reduced. Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the present invention. In FIG. 1, 2 is the ground, 4 is the foundation, 6 is the reinforced soil, and 8 is the cast-in-place wall. The reinforcing soil 6 is obtained by installing a slope member 10 and a mesh member 12 on the foundation 4 of the ground 2 and embankment 1.
4, the soil layer L is constructed, and the soil layer L is formed by sequentially laminating and constructing the soil layer L upward. On the vertical slope 16 of the reinforcing soil 6, a cast-in-place wall 8 is constructed. The cast-in-place wall 8 is the slope 1 of the reinforced soil 6
6 is constructed by casting a wall material 18 such as concrete.
The cast-in-place wall 8 includes a resistance member 20 buried in the embankment 14 of the reinforcing soil 6, a tensile member 22 having one end connected to the resistance member 20, and protruding from a slope 16 of the tensile member 22. The support member 6 is supported by the connecting member 24 connected to the other end side. Next, the operation will be described. In constructing the cast-in-place wall 8 of the reinforcing soil 6, as shown in FIG. 4, a foundation 4 is formed on the ground 2, and the slope members 10 are arranged on the foundation 4 of the ground 2 in a horizontal direction. The mesh member 12 is installed. The mesh member 12 has one end connected to the slope member 10 by a connecting tool (not shown),
The other end is extended and installed in a direction away from the slope member 10. The back side of the installed slope member 10 and the mesh member 1
On the upper side of 2, the embankment 14 is charged and compacted, and the first soil layer L
Perform 1 [0013] A second soil layer L2 is formed above the first soil layer L1. The second soil layer L2 includes the slope member 10.
Is connected horizontally to the embankment 14 of the first soil layer L while connecting the lower end of the first soil layer L1 to the upper end of the slope member 10 of the first soil layer L1. The other end side of the member 12 is extended in a direction away from the slope member 10 and installed on the ground 4. On the back side of the installed slope member 10 and on the upper side of the mesh member 12, the embankment 14 is charged and rolled to construct the second soil layer L2. Similarly, on the second soil layer L2, the third soil layer L3 and the subsequent layers are successively arranged upward to the uppermost soil layer. In this embodiment, as shown in FIG. 5, the first soil layer L1 is shifted from the first soil layer L1 to the uppermost tenth soil layer L1.
Work sequentially up to 0. Thus, the soil layer L is constructed on the foundation 4 of the ground 2 by the embankment 14 using the slope member 10 and the mesh member 12, and the soil layers L are sequentially stacked upward. To form the reinforced soil 6 having the vertical slope 16. When forming the reinforcing soil 6, first to first
The resistance member 20 and the tensile member 22 are embedded in the embankment 14 of an arbitrary soil layer L of the zero soil layers L1 to L10. In this embodiment, as shown in FIG. 5, the third soil layer L3 and the eighth
When forming the soil layer L8, the resistance member 20 is inserted into the embankment 14.
And the tensile member 22 are embedded. The resistance member 20 is embedded in the embankment 14 so as to be substantially parallel to the vertical slope 16 as shown in FIG. One end of a tensile member 22 is connected to the resistance member 20. As shown in FIG. 3, the tensile member 22 has the other end protruding from the slope 16 of the reinforcing soil 6, and connects the connecting member 24 to the protruding tip. Note that the connecting member 24 is
Is connected to the other end side of the tensile member 22 via the second member. As shown in FIG. 1, a wall material 18 made of concrete or the like covering the slope 16 is cast on the slope 16 of the reinforcing soil 6 so as to embed the connecting member 24 therein. Construction of the wall 8 is completed. In addition, the cast-in-place wall 8
After the completion of the reinforcing soil 6, after confirming that the deformation due to uneven settlement or the like has converged, the wall material 18 is cast and constructed. As described above, the method of constructing the cast-in-place wall 8 of the reinforcing soil 6 is as follows. The slope member 10 and the mesh member 12 having one end connected to the slope member 10 are installed on the ground 2, and the slope member 1
And the first soil layer L1 is constructed by charging the embankment 14 on the back side of the mesh layer 12 and the upper side of the mesh member 12 to perform the first soil layer L1.
The second soil layer L2 and the subsequent layers are sequentially constructed upward in the upper portion to form a reinforced soil 6. The method of constructing the cast-in-place wall 8 of the reinforced soil 6 is as follows. Member 20
And the other end of the tensile member 22 having one end connected to the resistance member 20 is projected from the slope 16 of the reinforcing soil 6 to connect the connecting member 24 so that the connecting member 24 is embedded. A cast-in-place wall 8 is constructed by casting a wall material 18 covering the slope 16 of the reinforced soil 6. Thus, the cast-in-place wall 8 of the reinforcing soil 6
Is a cast-in-place wall 8 having a vertical slope 16 by a reinforcing soil 6 using a net-like member 12 which is rich in deformation followability.
Can be constructed without causing cracks or breakage due to uneven settlement, can be simplified with the reinforcing soil 6 which is an adjacent structure having vertical wall surfaces, and the growth of vegetation from the slope 16 can be reduced. It is possible to prevent long-term maintenance of vegetation overgrowth. In the method of constructing the cast-in-place wall 8 of the reinforcing soil 6, since the earth pressure at all times is stable as the reinforcing soil 6, the stability of the cast-in-place wall 8 in an earthquake or the like is reduced by the resistance member 20.
, And the stability of the cast-in-place wall 8 can be quantitatively evaluated by using the connecting member 24 and the resistance member 20.
Since it is not necessary to lay a planar reinforcing material densely in the vertical direction of the slope 16 for the integration of the reinforcing soil 6 and the cast-in-place wall 8, the volume of the cast-in-place wall 6 can be reduced. The inertial force during an earthquake can be reduced. FIGS. 6 and 7 show a first specific example. In the first specific example, as shown in FIG. 6, a slope member 10 made of a welded wire mesh including an inclined slope portion 10a and a bottom surface portion 10b parallel to the ground 2 is used. One end side of the mesh member 12 is connected to a locking projection 10c formed on the portion 10b by a connecting member 28. The method of constructing the cast-in-place wall 8 of the first embodiment is shown in FIG.
b is fixed to the ground 2 with the fixing member 30, and the other end of the mesh member 12, one end of which is connected to the locking protrusion 10 c of the bottom surface 10 b by the connecting member 28, is connected to the slope member 10.
And is fixed to the ground 2 by the fixture 30, and is installed on the ground 2.
The first soil layer L1 is constructed by charging and compacting the embankment 14 on the upper side of the second soil layer L2.
The subsequent steps are sequentially laminated upward and constructed to form the reinforcing soil 6 having the steep slope 16. Thereafter, similarly to the first embodiment, the resistance member 20 and the tensile member 22 are buried in the embankment 14 of the reinforcing soil 6, and after the deformation of the reinforcing soil 6 converges, the steep slope of the reinforcing soil 6 is obtained. The in-place wall 8 supported by the resistance member 20, the tensile member 22, and the connecting member 24 is constructed on the slope 16 of the first embodiment. Thus, the cast-in-place wall 8 of the reinforcing soil 6
According to the construction method described above, the cast-in-place wall 8 having the steep slope 16 can be constructed by the reinforcing soil 6 using the net-like member 12 having high deformation followability without generating cracks or breakage due to uneven settlement. Thus, the same effects as in the first embodiment can be obtained. FIGS. 8 and 9 show a second specific example. In the second specific example, as shown in FIG. 8, a slope member 1 made of a perforated rope (expanded metal) composed of an inclined slope 10a and a bottom 10b parallel to the ground 2.
0, and a cable staying member 32 for connecting the slope portion 10a and the bottom portion 10b is provided.
One end of the net-like member 12 is connected to the locking projection 34 fixed to Ob by a connection tool 28. As shown in FIG. 9, the method of constructing the cast-in-place wall 8 of the second specific example is to fix the bottom portion 10b of the slope member 10 with the fixture 30 and install it on the ground 2,
The other end of the mesh member 12, one end of which is connected to the locking protrusion 10 c fixed to the bottom surface 10 b by the connecting member 28, is extended in a direction away from the slope member 10 and is fixed by the fixing member 30 to fix the ground 2. The embankment 14 is put on the back side of the slope member 10 and the upper side of the mesh member 12 and is compacted by rolling.
1 and the second soil layer L2 and subsequent layers are sequentially stacked upward on the first soil layer L1 to form a reinforced soil 6 having a steep slope 16. Thereafter, as in the first embodiment, the reinforcing soil 6
A resistance member 20 and a tensile member 22 are buried in the embankment 14, and after the deformation of the reinforcing soil 6 converges, the resistance member 20, the tensile member 22, the connecting member 24 To build a cast-in-the-wall 8 supported by. Thus, the cast-in-place wall 8 of the reinforcing soil 6
According to the construction method described above, the cast-in-place wall 8 having the steep slope 16 can be constructed by the reinforcing soil 6 using the net-like member 12 having high deformation followability without generating cracks or breakage due to uneven settlement. Thus, the same effects as in the first embodiment can be obtained. In the above-described specific example, the reinforcing soil 6 is formed by using the slope member 10 made of a welded wire mesh or a perforated rope, but a sandbag or a rope form is used as the slope member 10. It can be used to form the reinforcing soil 6. Also,
The mesh member 12 is generally made of a rope or plastic, but may be a geosynthetics, in particular, a mesh member made of a geogrid and a rope. As described above, the method of constructing a reinforced soil cast-in-place wall according to the present invention is directed to a cast-in-place wall having a steep or vertical slope by a reinforced soil using a net-like member having a high deformation followability. Can be constructed without cracks or breakage due to unequal settlement, and it can be simplified with reinforcement soil, which is an adjacent structure with vertical walls, to reduce the growth of vegetation from the slope. It can prevent long-term maintenance of vegetation overgrowth, and the constant earth pressure is stable as reinforcing soil, so it resists the stability of cast-in-place walls in the event of an earthquake. It can be secured by the pull-out resistance of the member, and the stability of the cast-in-place wall can be quantitatively evaluated by using the connecting member and the resistance member. There is no need to densely lay the planar reinforcing material in the vertical direction of the slope, and the volume of the cast-in-place wall can be reduced, so that the inertial force during an earthquake can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of a method of constructing a reinforced soil cast-in-place wall. FIG. 2 is an enlarged side view of a resistance member and a tensile member. FIG. 3 is an enlarged sectional view of a cast-in-place wall. FIG. 4 is a cross-sectional view of a reinforcing soil being formed. FIG. 5 is a sectional view of the completed reinforcing soil. FIG. 6 is a perspective view of a slope member and a net-like member showing a first specific example of a method of constructing a reinforced soil cast-in-place wall. FIG. 7 is a cross-sectional view of a reinforced soil cast-in-place wall using a slope member and a mesh member. FIG. 8 is a perspective view of a slope member and a net-like member showing a second specific example of the method of constructing a reinforced soil cast-in-place wall. FIG. 9 is a cross-sectional view of a reinforced soil cast-in-place wall using a slope member and a mesh member. [Description of Signs] 1 Ground 4 Foundation 6 Reinforced soil 8 Cast-in-place wall 10 Slope member 12 Net-like member 14 Filling 16 Slope 18 Wall material 20 Resistance member 22 Tensile member 24 Connection member 26 Insertion member

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Jun Nishimura             3-39-10 Yushima, Bunkyo-ku, Tokyo Mitsui Chemicals             In the capital company F-term (reference) 2D044 CA04

Claims (1)

Claims 1. A ground member having a slope member installed on the ground and the other end of a mesh member having one end connected to the slope member extending in a direction away from the slope member. And embankment is applied and rolled on the back side of the slope member and above the mesh member to construct a first soil layer, and the slope member and the mesh member are installed above the first soil layer. Then, the embankment is injected and compacted, and the second and subsequent soil layers are successively constructed upward to form a reinforced soil, and a resistance member is buried in the embankment of the reinforced soil substantially in parallel with the slope. The other end of the tensile member having one end connected to the resistance member is projected from the slope of the reinforcing soil to connect the connecting member, and covers the slope of the reinforcing soil so as to embed the connecting member. Reinforced soil cast-in-place, characterized by casting wall material to construct cast-in-place wall How to build a wall.