JP3142409B2 - Structure of anchor reinforced earth wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an anchor reinforced earth wall, and in particular, can use a viscous soil as a backing material for a wall material, facilitate a design calculation for stability, and reduce a width. The present invention relates to a structure of an anchor reinforced earth wall capable of realizing a solid structure, facilitating construction and reducing costs.

[0002]

2. Description of the Related Art FIG.
There are the following. In FIG. 6, 102 is the ground, 10
4 is a wall material and 106 is an embankment. Wall material block 10
The wall material 104 formed by placing the 4a in the horizontal direction and being vertically stacked is erected on the ground 102 with the lowermost part supported by the foundation 108, and each wall material block 1
One end of a tensile member 112 such as a reinforcing bar is attached to a back surface 110 of the cover 04a with a fixture 114. Tensile member 112
Is attached to a resistance member 116 such as an anchor plate buried in the embankment 106 by a fixture 118.

In constructing the wall material 104, first, a tensile member 116 is attached to a plurality of wall material blocks 104a placed horizontally in the lowermost part and a resistance member 116, and the embankment 106 is charged and compacted. The embankment 10 is placed on the plurality of wall material blocks 104a stacked horizontally on the lowermost wall material block 104a and the resistance member 116.
The work of loading the embankment 106 by attaching the tensile member 116 on the 6 and performing the rolling is performed sequentially from the lower part to the upper part in layers. Wall material 104 constructed in this way
Reduces the earth pressure acting on the back surface 110 to a plurality of resistance members 116.
It is supported by the pull-out resistance.

[0004] The embankment 106 between the wall member 104 and the resistance member 116 has a main earth pressure portion 120 for generating a horizontal main earth pressure on the wall member 104 and a passive earth pressure for generating a pull-out resistance in the resistance member 116. And a part 122.

[0005] The resistance of the resistance member 116 is determined by the shearing-out resistance by the passive earth pressure portion 122 of the resistance member 116 as shown in FIG. 7 or the active earth pressure by the active earth pressure portion 120 of the resistance member 116 as shown in FIG. Passive earth pressure part 122
And the differential pressure from the passive earth pressure. The wall member 104 supports the earth pressure acting on the back surface 110 by the resistance of the resistance member 116, and forms an anchor reinforcing earth wall 124 between the wall member 104 and the resistance member 116.

[0006]

However, in the structure of the conventional anchor reinforced soil wall 124, when cohesive soil is used as a backing material for the wall material 104, the resistance member 116 is used.
There is a problem that creep deformation occurs when a tensile load is constantly applied to the steel. However, for such a problem, there was an inconvenience that cohesive soil could not be used as a backfill material because safety was not confirmed.
In addition, sufficient internal stability cannot be obtained due to insufficient rigidity, and as shown in FIG. 5, there is a possibility that shear deformation may occur due to the earth pressure P, and there is a disadvantage that a rigid structure cannot be realized.

In the structure of the conventional anchor reinforcing earth wall 124, since the earth pressure acting on the back surface 110 of the wall member 104 is supported by the pull-out resistance of the plurality of resistance members 116, the internal stability and the external stability are maintained. In both cases, the setting of the dynamic model was complicated, and there was an inconvenience that the design calculation for stability was difficult.

Further, the resistance of the support member 112 due to the structure of the conventional anchor reinforced soil wall 124 is determined by the width A of the embankment 106 between the wall material 104 and the resistance member 112. Therefore, in order to obtain sufficient resistance, embankment 10
6, the width A needs to be increased. For this reason, there has been an inconvenience that construction becomes difficult and costs increase.

[0009]

SUMMARY OF THE INVENTION In order to solve such inconveniences, the present invention provides a method in which one end of a plurality of tensile members is mounted on a rear surface of a wall member in a horizontal and vertical direction. The embankment is arranged by vertically arranging the other end of the tension member, one end of which is vertically arranged on the back surface of the wall member among the plurality of tension members, substantially parallel to the back surface of the wall material. The tension member is attached to a plurality of resistance members embedded in the tension member so as to intersect with each other.

[0010]

According to the structure of the present invention, the other end of the tensile member, which is vertically arranged on the rear surface of the wall material and has one end attached thereto, is vertically arranged substantially parallel to the rear surface of the wall material. A plurality of resistance members buried in the embankment are mounted and provided so that the axes of the tensile members intersect with each other. Virtual walls of parallel resistors can be formed. Thereby, it is possible to form a structure in which the anchor reinforcing earth wall is provided between the wall material and the virtual wall, and this structure can exhibit a function of resisting the earth pressure from the outside as a block. it can.

The other end of the tensile member, which is horizontally arranged on the back of the wall material and has one end attached thereto, is vertically arranged substantially parallel to the back of the wall material and buried in the embankment. A structure formed by providing an anchor reinforcing earth wall between a wall material and a virtual wall of a resistance member portion by providing and attaching a plurality of resistance members so that respective axes of the tensile member intersect with each other. Sufficient shear resistance can be obtained.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of the present invention. In FIG. 1, 2 is the ground, 4 is the wall material, and 6 is the embankment. The wall material 4 is formed by placing the wall material blocks 4a in the horizontal direction and vertically stacking them and connecting them by connecting means (not shown). You. On the back surface 10 of the wall member 4 formed by placing and stacking the wall member block 4a, one end side of a tensile member 12 such as a plurality of reinforcing bars is attached by a fixture 14. The other end sides of the plurality of tensile members 12 are arranged in a horizontal direction and a vertical direction substantially parallel to the back surface 10 of the wall material 4 and a plurality of resistance members 16 embedded in the embankment 6.
, Respectively, which are provided by mounting with mounting members 18.

The plurality of resistance members 16 are arranged in the horizontal direction and the vertical direction substantially in parallel with the back surface 10 of the wall material 4 and buried in the embankment 6. Of the plurality of tension members 12 each having one end attached to the back surface 10 of the wall member 4, the tension member 1 having one end attached to the rear surface 10 of the wall member 4 in the up-down direction.
The other end of 2 is arranged in a vertical direction substantially parallel to the back surface 10 of the wall material 4 and a plurality of resistance members 16 embedded in the embankment 6,
Each of the tension members 12 is attached and provided so that each axis C intersects.

In this embodiment, the back surface 10 of the wall material 4
One of the mounting members 14 is provided such that one end sides of the two tensile members 12 are attached together, and the other end sides of the two tensile members 12 are vertically connected so that the respective axes C intersect. And is mounted on each of the two mounting members 18 of the two vertically adjacent resistance members 16 embedded in the embankment 6 at a portion facing the one mounting member 14.

Also, one of the resistance members 16 has a mounting member 18 attached thereto.
The other ends of the two tensile members 12 are attached together and provided,
One end side of these two tensile members 12 is vertically expanded so that each axis C intersects, and the back surface 10 of the wall member 4 at a portion opposed to the mounting member 18 of the one resistance member 16 is formed. It is provided by being attached to each of two vertically adjacent mounting members 14.

The mounting of the plurality of tensile members 12 to the wall member 4 and the resistance member 16 is performed alternately with the filling and compaction of the embankment from the lower part to the upper part of the wall member 4 to support the wall member 4. I do.

Next, the operation will be described.

In constructing the wall material 4, first, a plurality of wall material blocks 4a are placed horizontally at the bottom and connected by connecting means (not shown), and one of the back surfaces 10 of these wall material blocks 4a is attached. One end of each of the two tension members 12 is attached to the tool 14 so as to be fitted together, and the other ends of these two tension members 12 are vertically expanded so that the axes C intersect.

One of the two tensile members 12, which is mounted so as to be directed downward, has the other end buried in the embankment 6 at a portion opposed to the one mounting member 14. Of the two vertically adjacent resistance members 16, the lowermost resistance member 16 is attached to and attached to the mounting member 18.

The tensile member 12 attached to the lowermost wall member block 4a so as to face downward is attached to all of the plurality of wall member blocks 4a and the resistance member 16 placed in the horizontal direction. The embankment 6 is loaded onto the tensile member 12 attached downward and rolled.

Next, the lowermost wall material block 4a
Out of the two tension members 12 attached to the fixture 14 of the first embodiment, one of the tension members 12
Is mounted on the compacted embankment 6 by a mounting member 18 of the resistance member 16 arranged above the lowermost resistance member 16.

The tensile member 12 attached to the lowermost wall material block 4a so as to face upward is attached to all of the plurality of wall material blocks 4a and the resistance member 16 mounted in the horizontal direction, and is provided. The embankment 6 is loaded on the tensile member 12 attached upward and rolled.

Thereafter, the plurality of wall material blocks 4a are stacked on the lowermost wall material block 4a and connected in a horizontal direction, and the tensile member 12 is connected to the wall material block 4a in the same manner as described above. Attach to member 16. The work of attaching the tensile member 12 to the wall material block 4a and the resistance member 16 and loading and compacting the embankment 6 are sequentially performed from the lower part to the upper part by the lamination of the wall material block 4a. Lumber 4
It ends when it reaches the top of.

As a result, the wall member 4 erected on the ground 2 with the lowermost part supported by the foundation 8 is attached to the rear surface 10 of the wall member 4.
The rear surface 1 of the wall member 4 of the plurality of tensile members 12 having one end attached and arranged substantially horizontally and vertically in substantially parallel to
Tensile member 12 having one end attached and arranged in the vertical direction at 0
Are mounted on a plurality of resistance members 16 buried in the embankment 6 by being arranged in a vertical direction substantially parallel to the back surface 10 of the wall material 4 so that the respective axes C of the tensile members 12 intersect. And supported by the tension member 12 and the resistance member 16 to form the anchor reinforcing earth wall 24.

The back surface 10 of the wall material 4 thus constructed
As shown in FIG. 2, pull-out resistance is applied to each of the resistance members 16 attached to the other ends of the tension members 12 such that the axes C of the plurality of tension members 12 each having one end attached thereto intersect. A pressure bulb 20 is generated. These pressure bulbs 20 continue to interfere with each other.

As a result, the resistance member 16 is located at the position shown in FIG.
As shown in the figure, the wall material 4 reaching the upper portion from the lower portion of the wall material 4
A virtual wall 22 of a resistor substantially parallel to the above is formed.

For this reason, the wall material 4 and the virtual wall 22 formed at the resistance member 16 are formed by the wall material 4 and the virtual wall 22.
Thus, a structure 26 having an anchor reinforcing earth wall 24 is formed. This structure 26 has the same form as the double sheet pile cell.

The internal stability of the structure 26 is determined so that the wall material 4 and the imaginary wall 22 are not destroyed by the pressure applied equally to the wall material 4 and the imaginary wall 22 by the anchor reinforcing earth wall 24. It is obtained by resistance by the tensile member 12 connecting the virtual wall 4 and the virtual wall 22.

Therefore, the external stability of the structure 26 is such that the structure 26 can resist the earth pressure F from the outside of the structure 26 as a block. All that is needed is a weight that can be resisted.

As a result, the structure 26 formed by providing the anchor reinforcing earth wall 24 between the wall material 4 and the imaginary wall 22 formed at the resistance member 16 portion is not affected by the earth pressure F from the outside. It has a structure that can exhibit the function of resisting as a block.

For this reason, according to the structure of the anchor reinforced soil wall 24, a viscous soil can be used as a backing material for the wall material 4. In other words, the conventional structure shown in FIG. 6 has a problem in that, when cohesive soil is used, a creep deformation occurs due to the constant application of a tensile load to the resistance member 116. Has not been confirmed.

However, according to the structure of the anchor reinforced soil wall 24, since the backfill material is restrained by the virtual wall 22 formed at the resistance member 16, it can be applied to clay soil. Become.

According to the structure of the anchor reinforcing earth wall 24, the tension member 12 is attached to the wall member 4 and the resistance member 16 so that the axes C of the plurality of tension members 12 intersect. Thereby, sufficient shear resistance can be obtained for the structure 26 formed by providing the anchor reinforcing earth wall 24 between the wall material 4 and the virtual wall 22, and internal stability can be increased.

For this reason, even under the condition that the shear resistance by the backfill material cannot be sufficiently obtained, the internal stability can be obtained, and the shear deformation can be avoided. Therefore, even when the backfill material is cohesive soil or when the width A of the anchor reinforcing soil wall 24 cannot be made sufficiently large, it is possible to obtain a sufficient internal stability and to build a solid structure. Become.
In other words, the internal stability can be increased without increasing the width A of the anchor reinforcing earth wall 24, and a solid structure can be realized.

Further, according to the structure of the anchor reinforced soil wall 24, since a simple dynamic model can be set for both the internal stability and the external stability, the design calculation for the stability can be facilitated.

Further, according to the structure of the anchor reinforced soil wall 24, the resistance to the earth pressure F from the outside is determined by the own weight B and the width A. If the resistance to the internal deformation is sufficient, the width A Need not be too large. For this reason. Since the width A of the anchor reinforcing earth wall 24 can be reduced, the construction can be facilitated and the cost can be reduced.

The tension member 12 is, as shown in FIG.
Can also be installed. That is, one end of the two tensile members 12 is attached to one mounting member 14 of the back surface 10 of the wall member 4 so that the other ends of the two tensile members 12 are separated from each other. Then, the embankment 6 at the portion facing the one mounting fixture 14
And mounted on each of the fixtures 18 of the two resistive members 16 located above and below one resistive member 16 embedded therein.

The mounting member 18 of the resistance member 16 has
The other ends of the two tension members 12 are attached and provided, and one end of each of the two tension members 12 is separated so that a portion of the one resistance member 16 which faces the attachment 18 is It can also be provided by being attached to each of two fittings 14 located above and below one fitting 14 on the back surface 10 of the wall material 4.

That is, the tensile member 12 is attached to every other fixture 1 on the back surface 10 of the wall member 4 so that the axes C intersect.
4 and mounting fixtures 18 of every other resistance member 16 embedded in the embankment 6, respectively. As a result, sufficient internal stability can be obtained,
Construction of a solid structure becomes possible. In other words, it is possible to construct a solid structure capable of obtaining sufficient internal stability without increasing the width A of the anchor reinforcing earth wall 24.

[0041]

As described above, according to the present invention, a virtual wall can be formed in a resistance member portion buried in an embankment by being directed in a vertical direction substantially parallel to the back surface of the wall material. It is possible to form a structure in which the anchor reinforcing earth wall is provided between the virtual wall and the virtual wall, and furthermore, it is possible to obtain sufficient shear resistance for the formed structure and increase the internal stability. This allows
With this structure, a function of resisting the earth pressure from the outside as a block can be exhibited.

For this reason, the viscous soil can be used as a backfill material for the wall material, and the design calculation for stability can be facilitated.
The width can be reduced, a solid structure can be realized, construction can be facilitated, and costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a structure of an anchor reinforced earth wall showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a pressure bulb.

FIG. 3 is an explanatory sectional view of a structure formed by wall materials and virtual walls.

FIG. 4 is a sectional view showing another attachment state of the tensile member.

FIG. 5 is a cross-sectional view showing a shear deformation of a structure of a conventional anchor reinforced soil wall.

FIG. 6 is a cross-sectional view of a structure of a conventional anchor reinforced earth wall.

FIG. 7 is an explanatory diagram of resistance by a resistance member.

FIG. 8 is an explanatory diagram of another resistance by a resistance member.

[Explanation of symbols]

 2 Ground 4 Wall material 6 Embankment 8 Foundation 10 Back surface 12 Tensile member 14 Attachment 16 Resistance member 18 Attachment 20 Pressure bulb 22 Virtual wall 24 Anchor reinforced soil wall 26 Structure

Continuation of the front page (56) References JP-A-3-125720 (JP, A) JP-A-57-38849 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 17 / 18 E02D 5/80 103 E02D 29/02 303

Claims (1)

(57) [Claims] 1. A plurality of tension members which are arranged in the horizontal and vertical directions on the back surface of a wall material and are provided on one end side of the plurality of tension members, and which are vertically arranged on the back surface of the wall material among the plurality of tension members. The other end of the tensile member having one end attached thereto is arranged in a vertical direction substantially parallel to the back surface of the wall material so that each axis of the tensile member intersects a plurality of resistance members embedded in the embankment. The structure of the anchor reinforced earth wall, which is provided by being attached to a wall.