JP4142472B2 - Retaining wall protection structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a protective structure for various retaining walls made of concrete or steel that stops collapsed earth and sand such as steep slopes, landslides, and cut surfaces, and stops falling rocks.
[0002]
[Prior art]
Generally, there are gravitation type, standby type, leaning type, etc. in the type of retaining wall, and any type is formed by on-site cochlet.
[0003]
[Problems to be solved by the invention]
All such retaining walls are designed taking into account only the static earth pressure after the collapsed sediment has filled the front of the retaining wall, and the impact force of the collapsed sediment at the time of collapse is not considered.
For this reason, when the impact force of the collapsing earth and sand that collides with the front surface of the retaining wall exceeds the design load capacity of the retaining wall, the retaining wall may fall over or slide, and further the destruction of the concrete may occur. However, there is a problem that it causes damage to the building behind the retaining wall beyond the retaining wall, causing a major disaster.
[0004]
Therefore, in the case of existing retaining walls, there are houses and constructions adjacent to the retaining walls, and it is often difficult to reinforce the concrete by increasing the thickness of the concrete. If the thickness is increased to such a steep slope side, there is a problem that the sediment trapping capacity is greatly reduced.
In the case of a new construction, if the concrete is thickened on the steep slope side, a lot of earth and sand must be excavated, and if it is thickened on the opposite side, there is a problem of affecting adjacent houses and structures.
[0005]
[Means for Solving the Problems]
Therefore, the present invention provides a retaining wall protection structure for reducing the impact of collapsing earth and sand by attaching a shock absorber to the retaining wall, and a rigid body or an elastic body receiving plate and a rigid body or an elastic body substrate. A cushioning material made of an elastic body is disposed between the buffering material, and one side of the cushioning material is fixed to the receiving plate and the other side is fixed to the substrate to form a completely integrated buffering material. It is characterized by being attached to a retaining wall by a substrate .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
First Embodiment FIG. 1 is an explanatory view, in which 1 is a retaining wall, 2 is an installation ground, and 3 is collapsed earth and sand.
[0007]
Reference numeral 4 denotes a shock absorber, which is attached to a portion protruding from the installation ground 2 on the installation ground 2 side (front surface) of the retaining wall 1, as shown in FIG. However, the entire exposed surface up to the upper end of the retaining wall 1 is of course acceptable.
As shown in FIG. 2, the structure of the shock absorber 4 is a structure in which a shock absorber 7 is provided between the shock receiving plate 5 and the substrate 6 so as to be integrally formed. 5, the substrate 6, and the buffer material 7 are bolted, bonded, welded, welded, or the like, but are determined as appropriate according to the materials used for the impact plate 5, the substrate 6, and the buffer material 7.
[0008]
The impact receiving plate 5 is a portion that directly receives the impact of the collapsing earth and sand, and it is preferable that the impact receiving plate 5 is not easily broken by the impact of the collapsing earth. Or a plate made of an elastic material such as rubber.
In addition, as shown in FIG. 3, the receiving plate 5 forms a groove 51 having a V-shaped cross section in a straight line or a horizontally long zigzag shape in parallel with the horizontal direction, thereby clarifying the breakage point and the break load. In this case, the load reducing effect and the energy absorbing effect can be obtained.
[0009]
The substrate 6 is a part for fixing to the retaining wall 1 and is preferably a plate made of a rigid body such as a steel plate, a synthetic resin plate, or an FRP plate, but is not necessarily a rigid body, and is a plate made of an elastic body such as rubber. It may be.
The buffer material 7 is interposed between the receiving plate 5 and the substrate 6 and functions to buffer the impact of the collapsed earth and sand. Therefore, elasticity and plastic deformation are required, and it is conceivable whether the material itself is made of a material having elasticity or deformation, or whether elasticity or deformation occurs depending on the structure.
[0010]
Therefore, in this embodiment, the material is an elastic body such as natural rubber, synthetic rubber, or plastic, and the shape and hardness thereof are appropriately determined. For example, although the drawing shows a cylindrical shape with a constricted shape in the middle, it may not have a constricted shape and may have a prismatic shape.
Furthermore, as shown in FIG. 4, an elastic body having a structure in which a reinforcing material 8 made of woven fabric or nonwoven fabric made of fibers such as natural fibers, synthetic fibers or metal fibers is laminated and embedded may be used.
[0011]
As described above, the cushioning material 7 has its elastic characteristics changed or the number and arrangement of the cushioning material 7 are appropriately selected. Integrate by vulcanization adhesion, welding, etc. FIG. 5 shows an example in which the shock absorber 4 is attached to be inclined.
According to such a configuration, the relationship between the load of the shock absorber 4 and the amount of displacement is as shown in FIG. That is, a indicates a buffer and b indicates concrete as a reference. The areas surrounded by a and b indicate the amount of energy absorbed, and when the same impact energy is loaded, the generated load is large because b is small in change, and a is the amount of displacement compared to b. The generated load is small because of the large. This is the function of the buffer.
[0012]
Below, the attachment method to the structure of the buffer body 4 of the said structure is demonstrated.
7 is an explanatory front view, and FIG. 8 is an explanatory side view.
In the figure, 1 is a retaining wall, 4 is a shock absorber, and 6 is a substrate, which are attached by fixing the periphery of the substrate 6 with anchor bolts 9 provided on the retaining wall 1.
Moreover, as shown in FIGS. 9 and 10, a mounting structure in which only the upper part is fixed by the anchor bolt 9 and suspended may be used.
[0013]
In addition, when the buffer material 7 is attached to the substrate 6 with a bolt, the head of the bolt may protrude from the front side of the substrate 6. In that case, a gap is formed between the retaining wall 1 as shown in FIG. Further, since the retaining wall 1 and the substrate 6 are not necessarily in an accurate planar state, a gap is generated when the substrate 6 is attached to the retaining wall 1.
Therefore, sufficient rigidity can be secured by filling such a gap with a filler 10 such as mortar or resin. Further, the substrate 6 and the retaining wall 1 are reinforced, and the substrate 6 and the retaining wall 1 can be reduced in weight accordingly.
[0014]
Moreover, depending on the case, the buffer body 4 can be fixed to the retaining wall 1 only by this filler 10, and it is effective when the anchor bolt 9 cannot be attached.
Further, instead of being fixed by the anchor bolt 9, as shown in FIG. 12, a fixing bracket 11 is attached to the retaining wall 1 at a predetermined interval, and the fixing hole 11 is provided with a locking hole 12 provided in the substrate 6 of the buffer body 4. You may fix so that a latching protrusion may be latched. In this case as well, if there is a gap between the retaining wall 1 and the substrate 6 in the same manner as described above, it is preferable to fill with a filler. Good.
[0015]
FIG. 13 is an explanatory diagram. In FIG. 13, 5 is an impact plate similar to that of the first embodiment, 6 is a substrate similar to that of the first embodiment, and 7 is a buffer. It is a material.
As shown in FIG. 14, the buffer material 7 is a single cylinder body 71 such as a polygonal cylinder such as a hexagon or a cylinder or a cylinder structure 71 in which a plurality of cylinders are combined. It is made of a body or an elastic body such as rubber or synthetic resin or a natural material such as paper or wood.
[0016]
Moreover, as shown in FIG. 14, the impact force loading direction may be used either in the axial direction of the cylindrical structure or in the direction orthogonal to the axial direction.
The structure for attaching the buffer body 4 to the retaining wall 1 is the same as described above.
FIG. 15 is an explanatory view, in which FIG. 5 is an impact plate similar to that of the first embodiment, 6 is a substrate similar to that of the first embodiment, and 7 is a buffer. It is a material.
[0017]
Each of the above embodiments has a structure in which a plurality of cushioning members are attached as the cushioning material 7. In this embodiment, however, the cushioning material 7 is a plate-like body, and the shock absorbing plate 5, the substrate 6, and the like. In this structure, it is solid or has recesses and through holes 72 formed at appropriate intervals as shown in FIG.
The material is made of a rigid body such as synthetic resin, FRP or steel, or an elastic body such as rubber or synthetic resin, or a natural material such as paper or wood. The spring characteristic of FIG. 6 is obtained by causing plastic deformation. Further, in the case where the cushioning material 7 is a material having spring characteristics, a material having a desired elastic characteristic may be used. Further, in the case of rubber or synthetic resin, natural fibers, synthetic fibers, metal fibers, or the like may be used. A structure with a desired elasticity may be used as a structure in which a reinforcing material made of woven fabric or nonwoven fabric is laminated and embedded, and a large energy absorbing ability can be obtained by breaking the reinforcing material, thereby preventing damage to the structure body. .
[0018]
The structure for attaching the buffer body 4 to the retaining wall 1 in this way may be the same as described in the first embodiment.
[0019]
【The invention's effect】
According to the present invention described in detail above, a shock absorber is attached to the front of the retaining wall in various retaining walls made of concrete or iron, which stops steep slopes, landslides, cut surfaces, etc. Thus, the impact force of the collapsing earth and sand against the retaining wall can be reduced, and the retaining wall can be prevented from collapsing and falling. As a result, it has the effect of preventing secondary disasters on the building behind the retaining wall.
[0020]
Moreover, since it becomes possible to make the thickness of a retaining wall thin, it has the effect that construction becomes possible irrespective of the location conditions of a retaining wall.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a first embodiment. FIG. 2 is a cross-sectional explanatory view showing a structure of a shock absorber. FIG. 3 is an explanatory view showing a structure example of an impact plate. FIG. 5 is an explanatory diagram showing another example of the cushioning material. FIG. 6 is an explanatory diagram showing the relationship between the load of the cushioning body and the displacement amount. FIG. 7 is a front view showing an example of mounting the cushioning material on the retaining wall. Explanatory drawing [Fig. 8] Explanatory illustration of the side surface [Fig. 9] Explanatory illustration of a front surface showing an example of attachment of the cushioning material to the retaining wall [Fig. FIG. 12 is an explanatory plan view showing an example of attachment of the cushioning material to the retaining wall. FIG. 13 is an explanatory diagram of the second embodiment. FIG. 14 is an explanatory diagram showing the structure of the cushion. [Explanation of the third embodiment] [Fig. 16] Explanatory drawing showing the structure of the shock absorber [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Retaining wall 2 Installation ground 3 Collapsed earth and sand 4 Buffer body 5 Receiving plate 6 Substrate 7 Buffer material 71 Cylindrical structure 72 Through-hole 8 Reinforcement material 9 Anchor bolt 10 Filler 11 Fixing bracket 12 Locking hole

Claims (3)

In the protective structure of the retaining wall that reduces the impact of collapsing of the collapsed earth and sand by attaching a buffer to the retaining wall,
An elastic cushioning material is disposed between the rigid body or elastic body receiving plate and the rigid body or elastic body substrate. One side of the cushioning material is the above-mentioned receiving plate, and the other side is the above-mentioned A retaining wall protection structure characterized in that it is fixed to each of the substrates and configured as a single unit to form a buffer, and the buffer is attached to the retaining wall by the substrate . 2. The retaining wall protection structure according to claim 1, wherein a groove having a V-shaped cross section is formed in the receiving plate in parallel in the lateral direction .   2. The retaining wall protection structure according to claim 1, wherein a gap between the buffer body and the retaining wall is integrally formed by filling mortar.

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