JP2017025679A - Aseismic embankment structure, and construction method of aseismic embankment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aseismic embankment structure and a construction method for an aseismic embankment that may be realized through simple construction processes and effectively enhance seismic stability of the embankment.SOLUTION: An aseismic embankment structure 100 includes a long member 20 having an end 20a held in a block 1 and integrated with a retaining wall 10, and a covered member 30 fixed on the end 20a of the long member 20 protruding on a wall surface of the retaining wall 10, the cover member being integrated with the retaining wall 10. Therefore, the aseismic embankment structure suppresses collapsing of the retaining wall 10 with the long member 20 that functions as an anchor and suppresses partial squeezing out of the block 1 by the covered member 30 covering the wall surface of the retaining wall 10 when earth pressure of an embankment 50 is exerted on the retaining wall 10, and therefore prevents damage to the retaining wall 10. With the aseismic embankment structure 100 that includes the hard-to-be-damaged retaining wall 10, seismic stability of the embankment 50 may be preferably enhanced. Also, the aseismic embankment structure may be constructed through simpler construction processes compared to a construction method in which the retaining wall is built by casting concrete at a site.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic embankment structure and a method for constructing a seismic embankment.

Conventionally, as a construction method for constructing a vertical retaining wall that reinforces the embankment or a steep retaining wall that is close to the vertical at the time of embankment construction, an RRR construction method (for example, see Patent Document 1) or a tail armee construction method (for example, Patent Document 2). Technology) is known.
In the RRR method, sandbags and geotextiles are installed at the construction site of the embankment, and the embedding material of the sandbag thickness is repeatedly compacted on the geotextile, and a retaining wall is placed on the front of the multistage sandbags stacked to a predetermined height. It is a construction method that is built in place.
The tail arme method is a method of constructing a retaining wall having a predetermined height by repeatedly embedding a strip connected to the rear surface of each panel with a banking material while assembling a plurality of panels to form a retaining wall.

JP-A 64-21122 Special table 2007-508474 gazette

However, in the case of the RRR method, since the retaining wall is built in place on the front surface of the piled sandbags, it is a large-scale construction.
In the case of the tail arme method, it is possible to construct a retaining wall with a relatively small construction by assembling multiple panels, but a strong load (earth pressure) was applied locally to the retaining wall composed of multiple panels. As a result, there is a problem that a part of the panel is pushed out and the retaining wall surface is deformed.

  An object of the present invention is to provide a seismic embankment structure and a construction method for seismic embankment that can be constructed by simple construction and can suitably improve the seismic performance of the embankment.

In order to achieve the above object, one invention according to the present application is an earthquake-proof embankment structure,
Retaining wall formed by stacking multiple blocks on the front side of the embankment,
A long member having one end sandwiched between the blocks and the other end extending in a direction away from the retaining wall and embedded in the embankment;
A covering member that covers the wall surface of the retaining wall and is fixed to one end of the long member protruding from the wall surface;
I was prepared to.

With an earthquake-resistant embankment structure with such a configuration, a retaining wall is formed by stacking multiple blocks, so it can be constructed with simple construction compared to building a retaining wall in place at the construction site. High embankment can be built.
And this seismic embankment embankment structure is composed of a long member whose one end is sandwiched between blocks and integrated with the retaining wall, and a retaining wall fixed to one end of the long member protruding from the wall of the retaining wall. It has an integrated covering member and has a structure in which the retaining wall, the long member and the covering member are integrated, so that it functions as an anchor when the earth pressure of embankment acts on the retaining wall. It is possible to prevent the retaining wall from collapsing due to the long member and to prevent the block from being partially pushed out by the covering member covering the wall surface of the retaining wall, thereby preventing the retaining wall from being damaged. Can do.
That is, since this earthquake-resistant embankment structure is provided with the retaining wall which is hard to damage, the earthquake resistance of embankment can be improved suitably.

Also, preferably
The retaining wall has a substantially vertical wall;
The block has a rectangular front surface exposed as the wall surface, an upper surface having an inclination from the upper edge of the front surface to the embankment side, and is in contact with the lower edge of the front surface and is parallel to the upper surface. A plurality of blocks, and the plurality of blocks are stacked such that the front surface portion is substantially flush with each other.

When the front part of the block that makes up the retaining wall is a vertical surface, the upper surface part that contacts the upper edge of the front part and the lower surface part that contacts the lower edge of the front part are inclined surfaces that are stacked as retaining walls. Since the surface where the upper and lower parts of the block are joined is an inclined surface that goes down to the embankment side, when the earth pressure of the embankment pushes the block, the block is restored due to its own weight. This makes it easy to restore the retaining wall to a predetermined position by sliding down along the inclined surface.
In other words, the block is hard to be pushed out by the earth pressure of the embankment, and the retaining wall is less likely to be damaged. Therefore, if the seismic embankment structure is equipped with this retaining wall, the seismic resistance of the embankment is preferably improved. Can do.

Also, preferably
A plurality of the long members are installed so as to penetrate through the assumed slip surface of the embankment, and a pulling resistance member is disposed at the other end of the long member.

Since the long member is installed so as to penetrate the slip surface of the embankment, the shear resistance of the embankment in the vicinity of the slip surface is increased.
Moreover, since the pulling resistance member is arrange | positioned at the other end part of the elongate member, the function as an anchor of an elongate member can be improved.

Further, another invention according to the present application is a method for constructing an earthquake-resistant embankment,
In order to form a substantially vertical wall surface, the front surface portion that is rectangular and exposed as the wall surface, the upper surface portion that has a slope that goes down from the upper edge of the front surface portion, and the lower edge of the front surface portion are in contact with the front surface portion. A step of stacking a plurality of blocks including a lower surface portion parallel to the upper surface portion so that the front surface portion is substantially flush with each other;
A step of stacking a predetermined block among the plurality of blocks, sandwiching one end portion of the long member between the blocks, and installing the other end portion side of the long member at a position separated from the block; and
A step of throwing embankment material into the back side of the plurality of stacked blocks and embedding the long member,
Installing a covering member so as to cover the front portions of the plurality of stacked blocks, and fixing the covering member to one end of the long member protruding from between the blocks;
It was made to have.

With this method of building an earthquake-resistant embankment, a plurality of blocks are stacked to form a retaining wall, so it can be constructed with simpler construction than building a retaining wall in place at the construction site. A highly embankment can be constructed.
The seismic embankment structure built by this construction method is fixed to one end of a long member that is integrated with the retaining wall with one end sandwiched between the blocks and one end of the long member that protrudes from the wall of the retaining wall. And has a structure in which the retaining wall, the long member and the covering member are integrated, so that the earth pressure of the embankment acts on the retaining wall. In addition to preventing the retaining wall from collapsing with the long member functioning as an anchor, it is possible to prevent the block from being partially pushed out by the covering member covering the wall surface of the retaining wall, and the retaining wall is damaged. Can be prevented.
In other words, since the seismic embankment structure constructed by this construction method has a retaining wall that is not easily damaged, the seismic performance of the embankment can be suitably increased.

Also, preferably
Temporarily fix the lower end of the covering member to the lower block,
In response to the installation of the long member in the process of stacking the blocks, the upper end side of the covering member is pulled up, and the covering member is repeatedly fixed to one end of the long member. The wall surface of the retaining wall made of blocks was covered with the covering member.

  In this way, in the process of stacking the blocks and forming the retaining wall, it is possible to install a covering member that sequentially covers the wall surface of the retaining wall while installing a long member that sandwiches one end portion of the block, so it is efficient A highly earthquake-resistant embankment structure can be constructed.

  ADVANTAGE OF THE INVENTION According to this invention, it can construct | assemble by simple construction and the earthquake-resistant embankment structure which can improve the earthquake resistance of a banking suitably is obtained.

It is a schematic perspective view which shows the earthquake-resistant embankment structure of this embodiment. It is a schematic side view which shows the earthquake-resistant embankment structure of this embodiment. It is explanatory drawing (a)-(c) regarding the construction method of the earthquake-proof embankment structure of this embodiment.

  Hereinafter, with reference to drawings, the embodiment of the construction method of an earthquake-proof embankment structure and an earthquake-proof embankment concerning the present invention is described in detail. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

FIG. 1 is a schematic perspective view showing an earthquake-resistant embankment structure 100 of the present embodiment, and FIG. 2 (a) is a schematic side view thereof.
As shown in FIG. 1 and FIG. 2, the earthquake-resistant embankment structure 100 includes a retaining wall 10 formed by stacking a plurality of blocks 1 on the front side of the embankment 50, and one end portion 20 a sandwiched between the block 1 and the other end portion. The long member 20 extending in a direction away from the retaining wall 10 and embedded in the embankment 50 and the wall surface of the retaining wall 10 are fixed to one end portion 20a of the long member 20 protruding from the wall surface. Covering member 30 is provided.
This seismic embankment structure 100 reinforces the embankment 50 which is constructed by putting a embankment material on the back side of the block 1 (retaining wall 10) while stacking a plurality of blocks 1 to form a retaining wall 10. It is a structure built to enhance

The retaining wall 10 is a concrete block stacked retaining wall having a vertical wall or a steep wall surface near the vertical. The retaining wall 10 receives the earth pressure from the embankment 50 on the back surface of the retaining wall 10 and reinforces the embankment 50.
Each of the concrete blocks 1 constituting the retaining wall 10 has a front surface portion 1a that is rectangular and exposed as a wall surface, an upper surface portion 1b that has an inclination descending from the upper edge of the front surface portion 1a toward the embankment 50, and a front surface portion 1a. And a lower surface portion 1c parallel to the upper surface portion 1b. The front surface portions 1a of the blocks 1 are stacked so as to be substantially flush with each other.
Note that the block 1 as a single unit has a front surface portion 1a having a rectangular shape, and when the front surface portion 1a is a vertical surface, the upper surface portion 1b in contact with the upper edge of the front surface portion 1a is away from the front surface portion 1a. The lower surface portion 1c contacting the lower edge of the front surface portion 1a is an inclined surface parallel to the upper surface portion 1b. The left and right side surfaces in contact with the front surface portion 1a, the upper surface portion 1b, and the lower surface portion 1c of the block 1 are parallel to each other.
The block 1 of the present embodiment has a shape exhibiting a substantially parallelogram when viewed from the side, and the front surface portion 1a of the block 1 is aligned vertically in the same direction, and the upper block is aligned with the upper surface portion 1b of the lower block 1 1, the front surface 1a of the block 1 is substantially flush and a substantially vertical wall surface is formed.

In the present embodiment, a concrete foundation structure 11 made of concrete is embedded in the ground G, and the retaining wall 10 is constructed on the foundation structure 11.
When the lowermost block 1 is stacked on the foundation structure 11, the upper surface 11a of the foundation structure 11 has an upper surface 1b and a lower surface of the block 1 so that the front surface 1a of the block 1 becomes a vertical surface. It is an inclined surface corresponding to the portion 1c.

The long member 20 is an anchor member made of, for example, a reinforcing bar or a PC steel rod and connected in a direction perpendicular to the retaining wall 10.
One end 20a of the long member 20 is sandwiched between the blocks 1 and protrudes from the wall surface of the retaining wall 10, and a covering member 30 is attached to the one end 20a by a fastening member B such as a bolt.

A plurality of the long members 20 are provided so as to penetrate the sliding surface P assumed in the embankment 50 in the left-right direction. In other words, the longer long member 20 is installed in the deeper position of the embankment 50, and the longer elongate member 20 is installed in the shallower position of the embankment 50. Each long member 20 is assumed to be a slip of the embankment 50. It penetrates the surface P in the left-right direction.
A pulling resistance member 21 is disposed at the other end 20 b of the long member 20.

The pull-out resistance member 21 is, for example, a flat plate-like member that is vertically attached to the long member 20, and has a function as an anchor that resists the long member 20 being pulled out toward the retaining wall 10. The pull-out resistance member 21 may be a rod-like member that is attached to the elongate member 20 perpendicularly.
Since the pulling resistance member 21 is disposed on the long member 20, it becomes difficult for the long member 20 to be pulled out from the embankment 50, and the proof stress of the retaining wall 10 to which the long member 20 is connected is improved. In other words, if the retaining wall 10 is connected to the long member 20 provided with the pull-out resistance member 21, the resistance against the earth pressure of the embankment 50 is improved, so that the embankment 50 can be suitably reinforced. .

The covering member 30 is a member that can cover the wall surface of the retaining wall 10 such as a reinforcing net or a reinforcing sheet, and the fastening member B is attached to one end portion 20a of the long member 20 protruding from the wall surface of the retaining wall 10. It is attached.
The covering member 30 may be made of resin or metal as long as it has a high strength and weather resistance. The resin reinforcing net and the reinforcing sheet can be manufactured by weaving or knitting a plurality of strings made of resin fibers. Metal reinforcing nets and reinforcing sheets can be produced by weaving or knitting a plurality of wires or wire strands.
By disposing the covering member 30 that covers the wall surface of the retaining wall 10, it is possible to prevent the block 1 from being partially pushed out by the earth pressure of the embankment 50.

  Next, the construction method of the earthquake-proof embankment structure 100 of this embodiment is demonstrated.

First, as shown in FIG. 3A, the foundation structure 11 is embedded in the ground G in a range where the retaining wall 10 is constructed, and the lowermost block 1 is stacked on the foundation structure 11. At this time, the blocks 1 are stacked so that the front surface 1a is a vertical surface.
Then, the lower end portion of the covering member 30 is temporarily fixed to the lower block 1.
Moreover, a banking material is thrown into the back side of the piled block 1, and the banking 50 is constructed.

Next, as shown in FIG. 3B, the plurality of blocks 1 are stacked so that the front surface portion 1a of the block 1 is substantially flush.
When a predetermined block 1 is stacked among the plurality of blocks 1, one end 20 a of the long member 20 is sandwiched between the blocks 1, and the other end 20 b side of the long member 20 is separated from the block 1. Install in position. In addition, after installing the elongate member 20, you may fix the extraction resistance member 21 to the other end part 20b of the elongate member 20, and the elongate member which fixed the extraction resistance member 21 to the other end part 20b previously. 20 may be installed.

Further, as shown in FIG. 3B, in response to the installation of the long member 20 in the process of stacking the blocks 1, the upper end portion side of the covering member 30 whose lower end portion is temporarily fixed is pulled up, and the block The covering member 30 disposed on the wall surface so as to cover the front surface portion 1a of the first member is fixed to the one end portion 20a of the long member 20 protruding from between the blocks 1 using the fastening member B.
Moreover, a banking material is thrown into the back side of the stacked block 1 and the long member 20 is embedded in the banking 50.

And as shown in FIG.3 (c), when the several block 1 is further piled up and the predetermined block 1 is piled up, the end part 20a is inserted | pinched between the blocks 1, and the elongate member 20 is installed. Then, the covering member 30 pulled up so as to cover the front surface portion 1 a of the block 1 is fixed to one end portion 20 a of the long member 20, and a banking material is thrown into the back side of the stacked block 1 to form the long member 20. The seismic embankment structure 100 (see FIG. 2) in which the wall surface of the retaining wall 10 composed of the plurality of blocks 1 is covered with the covering member 30 is constructed in accordance with the construction of the embankment 50. .
The seismic embankment structure 100 constructed in accordance with the construction of the embankment 50 thus reinforces the embankment 50 and enhances the seismic resistance.

As described above, the earthquake-resistant embankment structure 100 of the present embodiment includes the retaining wall 10 formed by stacking the plurality of blocks 1 on the front surface side of the embankment 50 and the one end portion 20a sandwiched between the blocks 1 and integrated with the retaining wall 10. And a covering member 30 that is fixed to one end portion 20 a of the long member 20 protruding from the wall surface of the retaining wall 10 and integrated with the retaining wall 10. .
Such a seismic embankment embankment structure 100 can be constructed by simple construction as compared to the construction by placing the retaining wall in place at the construction site, and the embankment 50 on the back side of the retaining wall 10 is reinforced to embankment. 50 earthquake resistance can be improved.

And since this seismic-proof embankment structure 100 has the structure where the retaining wall 10, the elongate member 20, and the coating | coated member 30 were integrated, when the earth pressure of the embankment 50 acts on the retaining wall 10, an anchor The retaining member 10 is prevented from collapsing by the long member 20 and the pulling-out resistance member 21 functioning as a block, and the block 1 is prevented from being partially pushed out by the covering member 30 covering the wall surface of the retaining wall 10. It is possible to prevent the retaining wall 10 from being damaged.
That is, since this earthquake-resistant embankment structure 100 is provided with the retaining wall 10 which is hard to damage, the earthquake resistance of the embankment 50 can be improved suitably.

In particular, the block 1 constituting the retaining wall 10 has an upper surface portion 1b in contact with the upper edge of the front surface portion 1a and a lower surface portion 1c in contact with the lower edge of the front surface portion 1a when the front surface portion 1a is a vertical surface. Since the surface where the upper surface portion 1b and the lower surface portion 1c of the block 1 stacked as the retaining wall 10 are joined is an inclined surface that goes down to the embankment 50 side, the earth pressure of the embankment 50 causes the block 1 to When acting so as to push out, the block 1 is easily restored to a predetermined position of the retaining wall 10 by sliding down along the inclined surface by a restoring force caused by its own weight.
That is, the block 1 is not easily pushed out by the earth pressure of the embankment 50, and the retaining wall 10 is less likely to be damaged. Therefore, the embankment 50 is suitably used in the earthquake-resistant embankment structure 100 including the retaining wall 10. Can be reinforced and its earthquake resistance can be enhanced.

  Further, in the earthquake-resistant embankment structure 100 of the present embodiment, when the front surface portion 1a is a vertical surface, the upper surface portion 1b that is in contact with the upper edge of the front surface portion 1a and the lower surface portion 1c that is in contact with the lower edge of the front surface portion 1a are inclined. Since it is possible to construct a vertical retaining wall 10 that reinforces the embankment 50 or a steep retaining wall 10 that is steeply close to the vertical by building up the blocks 1 that are the faces, A wide area for the upper surface of the embankment 50 can be secured.

  In the above embodiment, the upper end of the covering member 30 is pulled up in response to the installation of the long member 20 in the process of stacking the blocks 1, and the covering member 30 is connected to one end of the long member 20. Although the fixing to 20a is repeated and the wall surface of the retaining wall 10 composed of the plurality of blocks 1 is covered with the covering member 30, the present invention is not limited to this. For example, the covering member 30 that covers the wall surface may be installed after the retaining wall 10 is completed, and the covering member 30 may be fixed to the one end 20 a of the long member 20.

  Further, the covering member 30 is not limited to covering the wall surface of the retaining wall 10 with a single covering member 30, and the retaining member 10 is supported with a plurality of covering members 30 so that the range in which the retaining wall 10 extends along the embankment 50 is divided into a plurality of parts. The wall surface of the wall 10 may be covered.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Block 1a Front part 1b Upper surface part 1c Lower surface part 10 Retaining wall 20 Long member 20a One end part 20b Other end part 21 Pull-out resistance member 30 Cover member 50 Embankment 100 Earthquake-resistant embankment structure G Ground P Sliding surface

Claims (5)

Retaining wall formed by stacking multiple blocks on the front side of the embankment,
A long member having one end sandwiched between the blocks and the other end extending in a direction away from the retaining wall and embedded in the embankment;
A covering member that covers the wall surface of the retaining wall and is fixed to one end of the long member protruding from the wall surface;
An earthquake-proof embankment structure characterized by comprising The retaining wall has a substantially vertical wall;
The block has a rectangular front surface exposed as the wall surface, an upper surface having an inclination from the upper edge of the front surface to the embankment side, and is in contact with the lower edge of the front surface and is parallel to the upper surface. The earthquake-resistant embankment structure according to claim 1, further comprising a lower surface portion, wherein the front surface portion is stacked so as to be substantially flush with each other.   The said long member is installed in multiple numbers so that the slip surface of the said embankment may be penetrated, and the extraction resistance member is arrange | positioned at the other end part of the long member. The earthquake-resistant embankment structure described in 1. In order to form a substantially vertical wall surface, the front surface portion that is rectangular and exposed as the wall surface, the upper surface portion that has a slope that goes down from the upper edge of the front surface portion, and the lower edge of the front surface portion are in contact with the front surface portion. A step of stacking a plurality of blocks including a lower surface portion parallel to the upper surface portion so that the front surface portion is substantially flush with each other;
A step of stacking a predetermined block among the plurality of blocks, sandwiching one end portion of the long member between the blocks, and installing the other end portion side of the long member at a position separated from the block; and
A step of throwing embankment material into the back side of the plurality of stacked blocks and embedding the long member,
Installing a covering member so as to cover the front portions of the plurality of stacked blocks, and fixing the covering member to one end of the long member protruding from between the blocks;
A method for constructing an earthquake-resistant embankment characterized by comprising: Temporarily fix the lower end of the covering member to the lower block,
In response to the installation of the long member in the process of stacking the blocks, the upper end side of the covering member is pulled up, and the covering member is repeatedly fixed to one end of the long member. The method for constructing an earthquake-resistant embankment according to claim 4, wherein a wall surface of a retaining wall made of a block is covered with the covering member.

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