JPH0581320U - Steel erosion control structure using cushioning material - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a steel erosion control structure having a simple structure capable of withstanding an instantaneous impact force caused by gravel or driftwood. [Structure] A plurality of curved steel pipes are horizontally arranged in an arch shape, and both ends of each steel pipe are fixed via cushioning materials.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a steel erosion control structure which has a function of obstructing debris flow and driftwood that are generated and flown down in a mountain stream and mitigating impact force acting on the structure due to collision thereof.

[0002]

[Prior Art]

 Conventionally, various types of steel erosion control structures have been proposed.A frame-type erosion control dam in which shaped steel is assembled into a frame shape and filled with stones etc. and arranged in a dam-like structure, and a steel material is a cylinder. Cell-type erosion control dam (Japanese Patent Laid-Open No. 62-55319, Japanese Utility Model Laid-Open No. 1-160022) in which the inside is assembled into a shape and filled with earth and sand, and a grid type erosion control dam that combines steel pipe members 188631), a steel slit dam (JP-A-51-58536), an arch type erosion control dam (JP-A-1-94104), and the like.

[0003]

[Problems to be solved by the device]

 However, in the conventional steel erosion control structures using steel pipe members, in consideration of the fact that excessive impact force is instantaneously generated in the entire structure or steel pipe members due to collision of debris, gravel, or driftwood, The size and frame structure of the building were studied and designed to withstand it.

It has been considered that the steel pipe members are inevitably increased in size and complexity by using such a structure having high rigidity, but today, steel erosion control structures are constructed. Since the area is often in an inconvenient area or where it is difficult for materials to be transported and workers to enter and leave, structures that are as simple as possible and require little maintenance are being demanded. An object of the present invention is to provide a steel erosion control structure having a simple structure capable of withstanding an impact force which is instantaneously applied by collision of gravel or driftwood.

[0005]

[Means for Solving the Problems]

 Since erosion control structures are subject to impact forces, it is generally considered to use cushioning materials.First, with conventional steel slit dams and lattice type erosion control dams, steel pipe members and foundations per dam width must be used. Since there are many fixed ends, if the structure is to be supported via cushioning materials, the number of locations where cushioning materials are required will increase. This not only complicates the structure, but also increases the number of maintenance steps. Furthermore, there was not only the question of whether such a cushioning material could withstand the impact of debris, but the specific structure for that was not clear.

[0006] The inventors of the present invention have made various investigations in order to achieve the above-mentioned problems against the background of such technical problems, and as a result, fixed to the dam sleeve concrete or the foundation concrete. By adopting a horizontal arch structure to reduce the number of edges, and by partially absorbing the impact force in the arch structure itself, unexpectedly normal rubber materials and spring materials etc. The present invention has been achieved based on the knowledge that impact force can be absorbed even by using the above-mentioned cushioning material and that a more effective sand control structure can be realized than before.

The gist of the present invention is a steel erosion control structure in which a plurality of horizontal steel arch members are arranged, and both ends of each horizontal arch member are fixed via cushioning materials. According to a preferred embodiment of the present invention, the horizontal arch members arranged in a plurality of stages described above are further connected to each other in the vertical direction by using a vertical member, and the legs of the vertical member are fixed via a cushioning material. ..

As the above-mentioned cushioning material, several forms are conceivable, but in the simplest case, an elastic material such as rubber material or spring material may be interposed, but the mechanical strength is further enhanced. By combining with the roller bearing mechanism, it is possible to withstand a considerably large impact force.

[0009]

[Operation] Next, the operation of the present invention will be described. Considering the case where a debris flow or driftwood that flows down from the upstream side collides with a horizontal arch member made of steel pipe made of curved steel pipe according to the present invention and an impact force acts, the horizontal arch member made of steel pipe itself. The impact absorbing force partially absorbs the impact force, and the shock absorbing material connected to the end of the steel pipe horizontal arch member further absorbs the energy due to the impact force transmitted from the steel pipe arch member, and the steel pipe member And, the impact force acting on the entire structure is more effectively mitigated and reduced.

Further, since the arch member is used in the present invention, the reaction force is concentrated on a small number of fixed ends, so that the number of cushioning materials to be installed is reduced, and the labor and maintenance of construction can be saved. Furthermore, if necessary, by combining with roller bearings, it becomes possible to control the displacement of the structure that causes harmful strain, more reliable effect can be expected, and it can be constructed as a large sabo structure.

[0011]

【Example】

 FIG. 1 is a schematic perspective view of a erosion control structure according to the present invention. In the figure, a plurality of horizontal arch members 1 made of steel pipe in which curved steel pipes are installed in an arch shape are provided, and an appropriate vertical member is provided. 3 is connected to the horizontal arch member 1 via a flange joint 2 to reinforce the horizontal arch member 1. The end portion 7 of the horizontal arch member is fixed to the dam sleeve concrete 9 via the cushioning material 8, while the vertical member 3 is also fixed to the foundation concrete 5 via the cushioning material 6 via the leg member 4 of the vertical member. Has been done.

In the conventional steel erosion control structure, the vertical member leg portion 4 and the horizontal arch member end portion 7 are directly fixed to the foundation concrete 5 and the dam sleeve concrete 9, and the collision energy of gravel, driftwood, etc. is steel. It acted as an extremely large impact force on the sand control structure, the foundation that supports it, and the sleeve concrete. Also, with steel slit dams, etc., there are extremely many installation locations on basic concrete, and it is difficult to provide a cushioning material for each.

However, in the present invention, since the horizontal arch member 1 made of steel pipe is provided, the cushioning material 6 and the cushioning material 8 absorb the collision energy more effectively. It is possible to reduce the impact force that acts on the concrete. Moreover, since the horizontal arch member is used, the number of cushioning materials to be installed is smaller than that of the slit dam and the installation is easy. The cushioning materials 6 and 8 may be covered with steel plate or concrete in order to prevent wear and deformation.

FIG. 2 is a schematic plan view of FIG. 1, which explains how the horizontal arch member 1 is impacted by gravel, driftwood, etc., and the impact force at that time is absorbed. FIG. 2 shows an example in which a tie rod is provided. If the reaction force in the direction perpendicular to the axis is small, the tie rod may not be provided.

Although not shown, according to the present invention, the cushioning material may be provided on both ends of the horizontal arch member, and the cushioning material may be provided on the legs of the vertical members. Specific configurations of the cushioning material 6 in these cases are shown in FIGS. 3 and 4. FIG. 3 shows an example of the structure without the tie rod, and FIG. 4 shows an example of the structure with the tie rod.

In FIG. 3, the buffer member 6 is attached to both ends of the horizontal arch member 1 via fixing flange plates 13. In this case, the cushioning material is rubbery. FIG. 4 shows the mounting structure of the horizontal arch member 1 when the tie rod 11 is provided, so that the end of the horizontal arch member 1 is appropriately attached to the cushioning member 6 by the joint 15 via the fixed flange plate 13. .. In this case as well, the cushioning material is made of rubber.

FIG. 5 is a schematic plan view (partial perspective view) of another structural example of FIG. In FIG. 5, the arch member that receives an external force is restrained from moving in the supporting direction by the roller bearing, but is allowed to move in the rising direction by the cushioning material. That is, the cushioning material absorbs the impact force in the rise direction. In the illustrated example, the cushioning material is provided on both ends of the horizontal arch member, and the cushioning material is also provided on the legs of the vertical members.

Specific configurations of the cushioning material 6 and the cushioning material 8 in these cases are shown in FIGS. 6 and 7. It should be noted that each of these shows an example provided in combination with a roller support mechanism. According to these structural examples, a larger impact force can be absorbed as compared with the cases of FIGS. 3 and 4. FIG. 6 shows an example of the structure of the cushioning material 8 when it is supported at a certain angle such as when it is provided at both ends of the horizontal arch member.

In the case of supporting the sleeve concrete 9 at a certain angle like the end 7 of the horizontal arch member 1, the supporting surface is divided into two, a coil spring 12 on one side and a roller on the other side. A bearing 14 is provided. The mechanism for supporting the roller is not particularly limited, and a conventional one may be used. The roller 16 is interposed on the contact surface with the foundation, and is connected to the end portion 7 by the pivot 18.

As described above, the end portion 7 is supported by the roller bearing and is also supported by the coil spring or an elastic material such as rubber. On the other hand, FIG. 7 is an explanatory view showing an example of the structure of the cushioning member 6 when it is supported in the vertical direction such as when it is provided at the end of the vertical member. It is supported by the foundation 5 via bearings 14. In this case, the coil panel 12 is provided on the side surface of the leg portion 4. The structure of each member itself may be the same as that of FIG.

[0021]

【The invention's effect】

 According to the present invention, compared to the structure using a structure having a conventional cross-sectional performance, fatigue and permanent deformation of the structure / member are reduced, so that the service life of the structure is increased and the impact Since the force is relieved, it is possible to reduce the amount of materials used.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a steel sand control structure using a cushioning material according to the present invention.

FIG. 2 is a plan view illustrating the operation of the present invention.

FIG. 3 is a side view showing the structure of the cushioning material of FIG.

FIG. 4 is a side view showing another structural example of the cushioning material of FIG.

FIG. 5 is a plan view illustrating the operation of the present invention according to another aspect.

FIG. 6 is a side view showing the structure of the cushioning material of FIG. 5 in a partial cross section.

FIG. 7 is a side view showing a partial cross-section of another structural example of the cushioning material of FIG.

[Explanation of symbols]

 1: Horizontal arch member 2: Flange joint 3: Vertical member 4: Vertical member leg 5: Basic concrete 6: Buffer material 7: Horizontal arch member end 8: Buffer material 9: Dam sleeve concrete

Claims (3)

[Scope of utility model registration request] 1. A plurality of horizontal arch members made of steel are arranged,
A steel erosion control structure in which both ends of each horizontal arch member are fixed via cushioning materials. 2. The horizontal arch members arranged in a plurality of stages,
The steel sand erosion control structure according to claim 1, wherein the vertical members are connected in the vertical direction and the legs of the vertical members are fixed via a cushioning material. 3. The both ends or the leg portions are fixed by using a roller bearing together with the cushioning material.
Described steel erosion control structure.