JPH0156206B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a bed protection work suitable for use as a bed protection work for meandering parts of rivers, drop parts, etc., or as foundation protection work for structures in rivers. This invention relates to a solid block and a bed foundation structure using the same.

[Prior art]

Traditionally, in fast-flowing rivers in mountainous areas, foundation works such as embankments in meandering sections or bridge pier structures erected in the river have been used to prevent the riverbed from lowering due to being scoured by flowing water or gravel in the flowing water. For this reason, for example, rubble root protection work that combines rubble such as natural stone, concrete block foot protection work, etc. are widely adopted.

[Problem that the invention seeks to solve]

By the way, rubble stone foundation work has disadvantages such as not only the processing cost for combining rubble stones such as natural stones is high, but also the transportation cost increases if there is no natural stone to be used as rubble nearby. Although solid construction can reduce costs, it has drawbacks such as poor durability due to severe wear and damage caused by running water and gravel in running water.

Therefore, for example, a type in which H-shaped steel is wrapped in concrete, or a type in which an elastic material such as rubber is stretched over the concrete surface, etc., have been proposed, but the former type depends on the flow velocity of the river. Although the degree of wear and damage prevention is only slightly improved, there is still a problem in terms of durability, and the latter method requires a troublesome work to stretch and fix an elastic body to concrete, and the unit cost also increases. There were problems such as.

[Means for solving problems]

Therefore, in this invention, in order to solve the above-mentioned problems, we focused on a material with excellent wear resistance such as a steel plate and an inexpensive filler such as concrete, and made a steel plate with reinforcing means inside. A highly durable block is formed by filling a box-shaped body with a filler such as concrete and integrally configuring the box-shaped body and the filler, and protecting a large number of blocks formed in this way. By aligning and arranging them in the floor footing, durability is improved and scour is prevented as much as possible.

In this case, it is preferable to provide a stiffener plate, a reinforcing bar, or a slip prevention means inside the box-shaped body as a reinforcing means, since this can improve the adhesion between the box-shaped body and the filler and increase the strength. .

[Effect]

In the bed protection block and the bed protection device using the same according to the present invention, a box-shaped body made of a wear-resistant material acts as a protective surface against gravel, etc. in water flow. .

〔Example〕

Next, preferred embodiments of the bed protection block and bed protection structure using the same according to the present invention will be described in detail with reference to the accompanying drawings.

In FIGS. 1 to 4, the bed protection block A according to the present invention is set to a predetermined thickness in consideration of the topography, flow velocity, etc. of the protected bed protection part to be installed, for example. A box-shaped main body 10 having a substantially rectangular parallelepiped shape is formed from a wear-resistant material made of a steel plate, a reinforcing means 12 is provided inside the box-shaped main body 10, and a filler material, for example, concrete 14 is poured and filled to form an integral structure. It is constructed by forming the

As is clear from FIGS. 2 to 4, the box-shaped main body 10 includes a pair of flat side plates 10a, 10b, a pair of U-shaped side plates 10c, 10d with curved outer edges of each corner, and A box body 16 with an open top is formed by welding the bottom plates 10e to each other, and after filling the box body 16 with concrete 14, a plurality of stud members 17 are arranged on the inner surface of the top plate. 10f, the entire peripheral edge thereof and each of the side plates 10a to 10d are closed by welding, and the welded portion a is chamfered by appropriate means to form a curved shape (see Fig. 4). ). In this case, reinforcing means 12 consisting of stiffener plates 18 arranged at predetermined intervals and reinforcing bars 20 arranged vertically and horizontally in, for example, three stages, are provided in advance on the inner surface of each of the side plates 10a to 10d. The aim is to improve the adhesion between the side panels and the concrete and increase the strength. Further, the upper end portion 18a of each stiffener plate 18 is connected to the top side plate 10f.
When fitted together, the positions are set so that the dimension h between the upper surface of the top plate 10f and the top end of each of the side plates 10a to 10d is the minimum dimension that can be welded (see FIG. 4).

FIG. 5 also shows that the side plates of the box-shaped main body 10 are divided into a pair of U-shaped side plates 11 having curved corner outer edges.
This is another embodiment of the bed reinforcement block according to the present invention formed of parts a and 11b, and in this case, the number of welded parts between the side plates can be reduced, making it possible to simplify manufacturing. .

Further, FIG. 6 shows that the box-shaped main body 10 is formed of a main body 21 made of cast steel and a lid 22, and the main body 21 and the lid are welded together, and a driving hole is formed in the lid 22. This is still another embodiment of the bed protection block according to the present invention, in which concrete is cast and filled from 24, and after the concrete is poured, the casting hole 24 is welded and closed with a closing plate 26. However, in this case, manufacturing can be facilitated.

The bed protection blocks according to the present invention configured in this way are arranged in rows and columns at a downstream position C, which is a predetermined distance away from the pier B, that is, in the protected bed protection part, as shown in FIG. 7, for example. By doing so, a foundation reinforcement structure for the pier is constructed. In this case, the position C can also be constructed by slightly excavating the river bed, providing a base made of, for example, a steel plate, and arranging the foot protection blocks on this base.

In the bed protection structure constructed in this way, the box-shaped body 10 forming each bed protection block A acts as a protective surface against wear caused by gravel, and prevents scouring of the riverbed as a whole. Can be done.

[Effects of the Invention] As mentioned above, according to the bed protection block according to the present invention, a steel box-shaped body with excellent wear resistance is used, and the outer edges of each corner of this box-shaped body are Since the portion is formed in a curved shape, it is possible to avoid problems such as damage to the joint portion, that is, the welded portion, and to dramatically improve durability. Also,
The box-shaped body, which also functions as a formwork, is simply poured and filled with concrete and sealed, making manufacturing easier. Reinforcing means are also provided inside the box-shaped body, making it easy to pour concrete or It has the advantage of being able to maintain sufficient strength against falling rocks, etc., and furthermore, the bed foundation structure using such bed foundation blocks has the advantage of being able to withstand scouring by water flow or gravel, etc. It has various advantages such as being able to prevent as much as possible.

The preferred embodiments of the bed protection block and the bed protection structure using the same according to the present invention have been described above, but the present invention is not limited to these examples. As the wear-resistant material that forms the box-shaped body as a solid block, we use a steel plate with stainless steel, ceramic, etc. on the surface, and as a filler, we use natural stone, earth and sand near the installation site, or mortar on these materials. You can use mixed materials as appropriate, or set the planar shape of the box-shaped body to various shapes such as circular, oval, and cross shapes.
Furthermore, after arranging box-shaped bodies with open bottoms at the installation location, these box-shaped bodies are poured and filled with concrete to form a direct integral part with the river bed or foundation, thereby constructing a bed protection structure. or, as shown in FIG. 8, within the scope of the present invention, such as constructing a bed protection structure by arranging a large number of cross-shaped bed protection blocks around the pier, etc. Of course, various design changes can be made.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a box-shaped main body forming a bed protection block according to the present invention, and Fig. 2 shows the box-shaped main body shown in Fig. 1 filled with concrete to form a bed protection block. Vertical cross-sectional view of the state, Figure 3 is the second
FIG. 4 is a sectional view of the main part of the bed foundation block shown in FIG. 2, and FIG. 5 is a box of the bed foundation block according to the present invention. FIG. 6 is a partially cutaway perspective view showing another embodiment of the bed foundation block according to the present invention, and FIGS. 7 and 8 are cross-sectional views of another embodiment of the shaped body. FIG. 2 is an explanatory plan view showing the relationship between a river and a bed protection structure formed using such a bed protection block. 10... Box-shaped main body, 12... Reinforcement means, 14...
... Concrete, 16 ... Box body, 17 ... Stud member, 18 ... Stiffener plate, 20 ...
Reinforcing bar, 21... Main body, 22... Lid body, 24... Driving hole, 26... Closure plate.

Claims (1)

[Scope of Claims] 1. A bed protection root characterized by filling a wear-resistant box-shaped body with a reinforcing means therein with a filler and temporarily forming the box-shaped body and the filler. Solid block. 2. The bed footing block according to claim 1, wherein the reinforcing means are stiffener plates arranged at predetermined intervals along the inner wall of the box-shaped main body. 3. The bed footing block according to claim 1, wherein the reinforcing means are reinforcing bars arranged vertically and horizontally on the inner wall of the box-shaped main body. 4. Claims 1 to 3, characterized in that the outer edge of the corner of the box-shaped main body is formed into a curved shape.
A bed protection block as described in any of the paragraphs. 5 A wear-resistant box-shaped body with reinforcing means inside is filled with a filler, and a large number of block bodies made by integrally forming this box-shaped body and the filler are used to secure the foundations of protected riverbeds. A bed protection structure characterized by being arranged and arranged in sections. 6. The bed protection structure according to claim 5, wherein the reinforcing means are stiffener plates arranged at predetermined intervals along the inner wall of the box-shaped main body. 7. The bed reinforcement structure according to claim 5, wherein the reinforcing means are reinforcing bars arranged vertically and horizontally on the inner wall of the box-shaped main body. 8. Claims 5 to 7, characterized in that the outer edge of the corner of the box-shaped main body is formed into a curved shape.
The bed foundation structure described in any of the paragraphs. 9. The bed reinforcement structure according to any one of claims 5 to 8, wherein a large number of block bodies are arranged in alignment on a base provided in the protected bed foundation part.