JP4708312B2 - Embankment structure - Google Patents

Description

  The present invention relates to a dam body that absorbs impacts such as falling rocks, avalanches, and collapsed earth and sand, and a dam body structure that can be applied to repair of a river dam body.

  Earth retaining walls and protective walls have been developed that resist the load of falling rocks, avalanches, and collapsible sediments. As these earth retaining walls and protective walls, as disclosed in Japanese Patent Application Laid-Open No. 2006-207174, a formwork is assembled at the site and constructed with concrete made in the field, or Japanese Patent Application Laid-Open No. 7-62675 There are various structures, such as those in which concrete blocks are piled up as disclosed above, or those in which embankments are embanked to reinforce and resist. The issues of these levee bodies are as follows.

(1) A common problem with these conventional structures that resist loads is that the construction period is long and is unsuitable for installation on the site requiring urgency.
(2) In constructions where sandbags were piled up to build a bank, the resistance of each sandbag could not be confirmed, and the design calculation of the entire structure could not be performed.
(3) If the method uses a concrete block, a large construction machine such as a crane is required.
(4) In the case of a reinforced embankment body, the use of various devices was forced to develop the embankment and roll the embankment.
JP 2006-207174 A Japanese Patent Laid-Open No. 7-62675

  The problem to be solved by the present invention is to enable rapid construction. Furthermore, avoid the use of large construction machines and simplify the construction on site. Furthermore, it is providing the bank structure which enables the design calculation of the whole structure.

Embankment structure according to the present invention,
A plurality of agglomerate blocks pre-manufactured by filling the bag material with granular materials;
It is comprised by the connection pillar penetrated and connected between the said several agglomerate blocks arranged in parallel in length and width.
The lower part of the above-mentioned connecting pillar may penetrate into the ground.
There is a case where the end of the connecting column is tensioned and fixed.
Furthermore, a protective fence may be constructed by using a part protruding from the upper part of the block block of the connecting column as a support column.
Alternatively, the auxiliary connecting pillar penetrates into a plurality of agglomerate blocks,
A connecting rope that also serves as a column and an auxiliary connecting column may be connected with a holding rope.
In addition, grout material is injected around the connecting pillars that vertically penetrate the plurality of agglomerate blocks,
A cylindrical expansion buffer may be formed by the granular material which grout material osmose | permeated between the connection pillar and the granular material of the surrounding lump block.

The load resistance wall such as falling rocks according to the present invention can obtain the following effects.
(A) Since the bag body is filled with granular materials to form a lump block, and these are arranged side by side in the vertical and horizontal directions, construction can be performed by human power, and it is also possible to handle construction that requires rapid work.
(B) It can also be installed by manpower, and does not require rolling machines or construction machines such as large cranes, and can be installed on a truck with a crane.
(C) Packing the granular material in the bag and restraining it creates an interlocking effect between the granular materials and maintains the regularity as a dam body, and the granular block itself is designed and calculated as a structural material. Is possible.
(D) The granular material restrained by the bag body meshes with each other, so that each granule block is not easily deformed, and an energy absorbing action by friction generated between the internal granular materials is exhibited.
(E) By burying the constraining rope connected to the upper part of the connecting pillar in the ground and fixing it to the anchor, the resistance to a load such as falling rocks can be increased.
(F) By forming the protective fence using the upper part of the connecting column, it is possible to reduce the number of constituent members and to omit the column erecting operation without requiring a separate column member. Moreover, since the lower part of a connection dispersion | distribution pillar is embed | buried in the ground, a fence is stabilized and a foundation concrete can be abbreviate | omitted.
(G) By injecting the grout material around the connecting column, the connecting column and the resistor can be integrated and the agglomerate blocks stacked up and down can be integrated to increase the strength against the load.
(H) By injecting the grout material, an expansion buffer body in which the grout material hardens in a cylindrical shape is formed around the connecting pillar, and the area receiving the impact is expanded, and the impact energy absorption performance is improved. .
(Li) Further, by curing a part of the granular material with the grout material, the behavior change with the surrounding granular material is reduced, and the energy absorption efficiency is increased.

  The dam body structure according to the present invention is a wall in which structural calculation is possible by filling a cubic or rectangular parallelepiped bag material with sand and other granular materials and arranging them side by side in the vertical and horizontal directions.

<a> Bag body In the figure, 1 is a bag body, which is a restraining member for the granular material 5 to be packed therein. It has a cubic shape. As a material of the bag body 1, a bag made of polyester woven fabric or the like can be adopted. FIG. 2 shows an embodiment of the bag body 1. Three sides of the upper surface 2 can be opened and closed by a fastener, and a pipe 3 penetrating in the vertical direction of the bag body 1 is formed at the center of the bag body 1. It is erected. On the back surface of the upper surface 2, a connecting pipe 4 that can be connected to the pipe 3 is attached. In addition, for opening and closing the bag body 1, a string is passed like a belt through the edge of the woven fabric that is the upper surface of the bag body 1, and after filling the granular material 5, the string is pulled to become the upper surface 2. It is also possible to squeeze the woven fabric like a drawstring bag and tie it in a string. As the bag body 1, a bag having an open top surface can be used.

<B> Granular Material The above-described bag material 1 is filled with the granular material 5. As the granular material 5, a granular material that is not easily compressed and disintegrated in a state where the bag 1 is filled can be widely used, and various materials such as crushed stone, earth and sand, concrete glass, and molten slag can be used. In addition, particles treated with various wastes can be widely used. These granular materials 5 are filled and restrained in the bag material 1 to form cubic agglomerate blocks 6. The agglomerate block 6 is produced in advance and stocked at a place other than the site. The size of the agglomerate block 6 is not uniform, and various different sizes are stocked, and those having an appropriate size are selected and used according to the situation at the site.

<C> Connecting column The connecting column 7 can use various materials made of metal or concrete, and the length of the connecting column 7 is longer than the length penetrating the plurality of agglomerate blocks 6. . The lower end portion of the connecting column 7 is, for example, a screw-shaped anchor 8. Such an anchor 8 of the connecting column 7 is embedded in the ground, and the top is raised from an intermediate portion of the connecting column 7 protruding to the ground. A grout material is injected into the ground and fixed.

<D> Accumulation of agglomerate block A plurality of agglomerate blocks 6 are accumulated through the connecting pillar 7 through the pipe 3 of the agglomerate block 6. Alternatively, after the agglomerate block 6 is first stacked, the lower part may be embedded in the ground through the connecting column 7 so as to penetrate the agglomerate block 6. The agglomerate blocks 6 are not only arranged in the vertical direction, but may be arranged in succession on the left and right sides, and may be arranged in the front and back. The dam body structure A is constituted by the agglomerate blocks 6 stacked and arranged in this manner. In addition, the agglomerate blocks 6 can be arranged freely in front, rear, left, and right, and can be arranged freely corresponding to curves, complex curves, and corners. In addition, even when the surface of the terrain has irregularities, the agglomerate block 6 can be installed corresponding to the irregularities, and the construction freedom is exceptional. When the bag bodies 1 having the shape with the upper surface opened are stacked, a lump block 6 having a sealed upper surface is placed on the top to form a bank structure A.

<E> Integrated Structure with Connecting Columns As described above, the stacked granule blocks 6 are integrated by connecting the connecting columns 7 penetrating in the vertical direction across the plurality of agglomerate blocks 6. The external force applied to each block 6 by the connected plurality of agglomerate blocks 6 can be distributed and transmitted to all the blocks. That is, the bank body structure A is an aggregate of a large number of agglomerate blocks 6, but can function as a pseudo-integral structure as a whole.

<F> Connection in Lateral Direction As shown in FIGS. 6 to 8, the granule block 6 may be integrated by a connecting member 18 such as a steel rod that penetrates between adjacent granule blocks 6. By connecting also in the lateral or front-rear direction, the function as the above-described aggregate is further improved, and functions better as a quasi-monolithic structure.

<G> Impact Action Since the granular material 5 in the granule block 6 is restrained by the bag 1, the granular material 5 produces an interlocking effect by friction with each other, and the regularity as the granular block 6 To maintain. That is, the shape can be maintained without changing the shape of the bank body structure A which is the aggregate. When impacts such as falling rocks and avalanches act on the levee body structure A, the granular materials 5 mesh with each other and the blocks 6 become stiff. That is, even if an impact acts, it does not easily deform and break. Further, the impact energy can be absorbed by the internal friction of the granular material 5 packed in the agglomerate block 6, and it can withstand a large impact or load. Furthermore, it becomes a structure that resists a large impact or load due to the weight of the dam structure A itself that is a pseudo-integral structure.

<H> Protective fence A wire fence 9 is stretched on the protruding portion of the connecting column 7 from the agglomerate block 6 to form a protective fence 10. FIG. 6 shows that a connecting rope 12 such as a steel wire is connected to the upper part of the connecting column 7 and is embedded in a hole 13 formed in a natural mountain and fixed with a grout material 14 or the like. This is a case where the anchor 15 is used. In this embodiment, the protective fence 10 is formed. However, the protective fence 10 may not be installed, and the granule block 6 may be stacked up to the top to form the bank structure A.

<I> Other Integration of Levee Structure The above Example 1 is a case where a plurality of agglomerate blocks 6 are integrated using the connecting pillar 7, but a belt is attached to the plurality of agglomerate blocks 6. It is possible to tie them together and unite them. Alternatively, belts may be attached to the individual bags 1 in advance, and the adjacent blocks 6 may be connected by connecting the belts to be integrated as the bank structure A.

<J> Injection of grout material FIG. 3 shows another embodiment of the present invention. As the pipe 3 of the bag material 1, a member having a large number of holes or a fiber member that exudes grout is used. The grout material 11 is injected into the filler 5 of the granule block 6 through the pipe 3 so that the connecting column 7 and the granule block 6 are integrated. Thus, the strength as the dam body structure A is increased by integrating the connecting column 7 and the granule block 6 with the grout material 11. FIG. 4 and FIG. 5 show the specific action inside the agglomerate block 6 by the grout material 11, and the grout material 11 is hardened around the connecting pillar 7 to be integrated with the granular material 5. The structural member which should also be called the cylindrical expansion buffer B is formed. The function of the expansion buffer B can enhance the connecting function between the blocks 6 in the vertical direction, and can achieve an integrated organization between the blocks 6.

<K> Function of Expansion Buffer Since the expansion buffer B is formed in a thicker columnar shape around the connection column 7, its diameter is larger than the diameter of the connection column 7. In other words, the length of the outer periphery of the expansion buffer B is much longer than the length of the outer periphery of the connecting column 7. The receiving area S ₂ of the expansion buffer B is larger than the receiving area S ₁ when the impact F of the connecting column 7 is applied, and the impact is received over a wide area and distributed and received. Thus, a buffering effect is exhibited. Moreover, the buffer layer hardened by the grout material 11 around the center connecting pillar 7 having high hardness, the uncured granular material 5 around the center, and the granular material 5 when receiving an impact force toward the center. The behavioral change of becomes less. Thus, the energy absorption effect, that is, the buffering effect was enhanced by reducing the behavior change of the granular material 5.

<I> Improvement of resistance force FIG. 7 shows a rectangular parallelepiped shape as the bag material 1, and the length in the width direction of the dam body structure A is increased to increase the resistance force to the load. It is a thing. Moreover, the lower part of the auxiliary | assistant connection pillar 16 which penetrates the granule block 6 up and down similarly is embed | buried under the ground rather than the connection pillar 7 in the ground. The upper end of the auxiliary connecting column 16 and the upper end of the connecting column 7 are connected by a holding rope 17 such as a steel wire, and the falling moment of the protective fence 10 can be countered using the weight of the block. In addition, it is not necessary to install anchors on natural ground.

<M> Connection of Adjacent Resistors FIGS. 8 to 10 show that a connecting material 18 such as a PC steel rod is passed between adjacent block blocks 6 and a nut or the like is screwed at a desired position. This is an example of connection. In this way, by connecting the agglomerate blocks 6 arranged in the lateral direction, the integration of the entire resistance wall A is enhanced, and even if a load acts on the agglomerate block 6, resistance is achieved depending on the strength of the entire resistance wall A. Will do.

  In the embodiment shown in FIG. 3, it is adopted that a hook-like pressing member 19 is passed through the exposed portion of the connecting column 7 and a nut 20 is screwed onto and fixed in a state where a prestressing force is applied. ing. Thereby, the effect of promoting the integration of the upper and lower agglomerate blocks 6 can be obtained.

It is a perspective view of the resistance wall constructed | assembled using the grain block. It is a perspective view of a bag. It is sectional drawing at the time of inject | pouring grout material in a bank body structure. It is sectional drawing of the state which formed the expansion buffer body with the grout material. It is a horizontal sectional view of an expansion buffer. It is sectional drawing of the state which connected the upper end of the connection pillar to the anchor of a natural ground. It is sectional drawing of the state which arranged the auxiliary | assistant connection pillar on the natural ground side of the connection pillar. It is a front view of the state which penetrated the connection material to the adjacent resistor. It is sectional drawing of the state which penetrated the connection material. It is sectional drawing of the state which penetrated the connection material.

Explanation of symbols

A: Bank body structure B: Expansion buffer body 1: Bag body 2: Upper surface 3: Pipe 4: Connecting pipe 5: Granular material 6: Grain block 7: Connecting pillar 8: Anchor 9: Wire net 10: Guard fence 11: Grout material 12: Retaining rope 13: Hole 14: Grout material 15: Anchor 16: Auxiliary connecting pillar 17: Retaining rope 18: Connecting material 19: Presser member 20: Nut

Claims (6)

A plurality of agglomerate blocks pre-manufactured by filling the bag material with granular materials;
An embankment structure constituted by connecting pillars that penetrate and connect between the plurality of agglomerate blocks arranged side by side in the vertical and horizontal directions.   The dam body structure according to claim 1, wherein a lower portion of the connecting column penetrates into the ground. Embankment structure according to claim 1, characterized in that fixed under tension to the end portions of the connecting post.

  2. The bank body structure according to claim 1, wherein a protection fence is constructed by using a part protruding from the upper part of the block block of the connecting column as a support column.   The levee body structure according to claim 4, wherein the auxiliary connecting pillar is inserted into the plurality of agglomerate blocks, and the connecting pillar also serving as the support and the auxiliary connecting pillar are connected by a holding rope.   A grout material is injected around a connecting column penetrating a plurality of agglomerate blocks up and down, and the granular material penetrated by the grout material between the connecting column and the granular material of the surrounding agglomerate block has a cylindrical shape. 2. An embankment structure according to claim 1, wherein an expansion buffer is formed.

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