JPH0352821Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is a retaining wall to prevent the collapse of a cut surface or embankment surface, especially a corner retaining wall installed at a corner, to prevent it from sliding due to earth pressure. It is related to the structure of

[Conventional technology]

Conventionally, there are retaining walls of this type as shown in FIGS. 3 and 4. That is, a foundation material A such as chestnut stone, concrete B, and mortar C are sequentially laminated on the ground to be laid, and a corner retaining wall D is installed on top of this, and standard type retaining walls are installed on the left and right sides of the corner retaining wall D. After connecting the straight retaining walls E, the front sides of the upright versions F and G of each retaining wall D and E are filled with soil H to the depth of penetration, and the back sides of the upright versions F and G are filled with soil H. This is a structure in which soil I is piled up to the top of F and G.

However, as shown in the figure, in this corner retaining wall D, since the adjacent upright plates F each receive horizontal earth pressure P1, the resultant force P is greater than the earth pressure P1 against the straight retaining wall E, and moreover, the corner retaining wall D Retaining wall D
If the length of the bottom plate J was the same as the length of the bottom plate K of the straight section retaining wall E, there was a risk of sliding.

Therefore, in order for the corner retaining wall D to resist earth pressure to the same extent as the straight retaining wall E, the corner retaining wall D must:
It is necessary to take measures to increase the sliding resistance.

As a device employing such means, there is an invention disclosed in Japanese Patent Application Laid-open No. 10335/1983 as shown in FIG.

This is a method of increasing sliding resistance by connecting a mesh plate C to the bottom plate B of the corner retaining wall A in the direction of the earth pressure resultant force.

As the mesh plate C, a mesh-like material such as a metal plate such as an expanded band or punching metal, plastic, or chemical fiber net is used.
The pins D are connected to each other by connecting each other with a wire E or the like. Therefore, the mesh plate C strengthens the engagement with the back soil, and since it is connected to the bottom plate B, the frictional force acting on the mesh plate C further increases the sliding resistance of the corner retaining wall A.

Another conventional example is a device disclosed in Japanese Utility Model Application No. 61-130653 as shown in FIG. That is, an auxiliary plate D made of precast, which horizontally engages with the bottom plate C of the straight-line retaining wall B adjacent to the corner retaining wall A, is connected to the bottom plate E of the corner retaining wall A.

In addition, as shown in Fig. 7, the corner retaining wall A
An auxiliary plate C made of precast is brought into horizontal contact with the open surface of the front wall B that is open on the opposite side to the direction of the earth pressure resultant force, and is integrally connected to the bottom plate B. Publication No. 135950).

Furthermore, as shown in Fig. 8, the corner retaining wall A
An auxiliary plate D having a length connecting the end C of the front wall B of
is installed perpendicularly to the earth pressure direction on the bottom slab E of the corner retaining wall A, and is integrally attached to the bottom slab E and the end C of the front wall B (Utility Model 61).
-169155).

[Problem that the invention attempts to solve]

However, in the case shown in FIG. 5 above, the mesh plate C, which is a member connected to the bottom plate B of the corner retaining wall A, is easily deformed, so even if it can resist sliding, the corner retaining wall A is slid and deformed. The disadvantage is that the amount is large, and in the case of the ones shown in Figures 6 and 7, it is difficult to install the precast auxiliary plate without lifting it from the mortar that has been cast and hardened in advance. However, there is a problem in that if it lifts up even a little, the sliding resistance decreases.

Furthermore, the one shown in FIG. 8 has a complicated structure and is heavy, causing problems in terms of transportation and cost.

[Means for solving problems]

The present invention was developed in order to solve the above-mentioned drawbacks, and it connects the reinforcing bars by welding or binding to the reinforcing bars that protrude from the edges formed at the top corner of the bottom plate of the corner retaining wall. By assembling the concrete and pouring concrete onto the assembled reinforcing bars and integrally forming an auxiliary plate that protrudes in the direction opposite to the direction of the resultant earth pressure, the sliding resistance is increased and landslides are reliably prevented. The purpose of this invention is to provide an anti-slip structure for corner retaining walls.

[Example of the present invention]

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. Note that FIG. 1 is a perspective view of a corner retaining wall structure according to the present invention, and FIG. 2 is a longitudinal sectional view of the same retaining wall.

In the above drawing, reference numeral 1 denotes a corner retaining wall, and this corner retaining wall 1 is composed of upright plates 2 and 3 and a bottom plate 4 connected to both upright plates 2 and 3.

The top corner of the bottom plate 4 is cut into an L shape to form an edge, and the ends of the reinforcing bars 5 buried inside are exposed at the edges 4a and 4b of the edge.

Reference numeral 6 denotes an auxiliary plate connected to the end surfaces 4a and 4b of the bottom plate 4, and this auxiliary plate 6 is assembled by connecting reinforcing bars to the exposed ends of the reinforcing bars 5 by welding or bundling, etc. in a lattice shape. It is formed by pouring concrete 8 onto auxiliary reinforcing bars 7.
The reference numeral 9 denotes a standard straight retaining wall, which is composed of an upright plate 10 and a bottom plate 11.

"Operation of the embodiment" First, on the ground to be laid, the foundation material 12 such as chestnut stone, the concrete 13 and the mortar 14 are laid.
etc. are laminated one after another, and the corner retaining wall 1 is installed on the slightly hardened layer, and the corner retaining wall 1 is
A straight retaining wall 9 is connected to the left and right connecting surfaces.

Next, at the site, the end surfaces 4a, 4 of the bottom plate 4 are
An auxiliary reinforcing bar 7, which is a separate member, is connected to the end of the reinforcing bar 5 exposed from b by welding, bundling, etc., and assembled.

Then, by pouring concrete 8 to a predetermined thickness on this auxiliary reinforcing bar 7, an auxiliary plate 6 integrated with the bottom plate 4 is formed. At this time, the upper surface of the auxiliary plate 6 and the upper surface of the bottom plate 4 of the corner retaining wall 1 are formed on the same plane. In addition, it is desirable that the left and right width of the auxiliary plate 6 is the same as the width between both end surfaces 4a and 4b, and if it is made larger than the width of both end surfaces 4a and 4b, the straight portion retaining wall 9 End surface 11 of bottom plate 11 of
It is necessary to avoid contact with a.

After the above work is completed, soil 15 is filled up to the depth of penetration on the front side of the upright plates 2, 3, 10 of each retaining wall 1, 9, and on the back side of the upright plates 2, 3, 10. ,
Back soil 16 is piled up to the upper ends of the upright plates 2, 3, and 10.

[Effect of idea]

As described above, the present invention is assembled by connecting the reinforcing bars 7 by welding or bundling to the reinforcing bars 5 protruding from the edges 4a and 4b formed at the top corners of the bottom plate 4 of the corner retaining wall 1. An auxiliary plate 6 is formed integrally with the bottom plate 4 by pouring concrete 8 onto reinforcing bars 7 and protruding in a direction opposite to the direction of the resultant earth pressure.

Therefore, since the back soil 16 acts on the entire surface of the auxiliary plate 6, the frictional force against sliding is large, and the bottom plate 4 and the auxiliary plate 6 are connected to the reinforcing bars 5 in the corner retaining wall 1, the auxiliary reinforcing bars 7, and Since they are firmly connected by the concrete 8, the sliding resistance against the corner retaining wall 1 is increased, and slipping can be reliably prevented. In particular, since the auxiliary plate 7 is bonded to the mortar or the like on its lower surface, a synergistic effect such as further increase in sliding resistance can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a corner retaining wall structure according to the present invention, Fig. 2 is a vertical cross-sectional view of the same retaining wall, Fig. 3 is a perspective view of a conventional corner retaining wall structure, and Fig. 4 is the same retaining wall structure. FIG. 5 is a perspective view of another conventional corner retaining wall structure, and FIGS. 6 to 8 are perspective views showing still other different conventional corner retaining wall structures. . 1... Corner retaining wall, 2, 3... Upright version, 4
... Bottom plate, 4a, 4b ... Edge end face, 5 ... Reinforcement bar, 6 ... Auxiliary plate, 7 ... Auxiliary reinforcing bar, 8 ... Cast-in-place concrete, 9 ... Straight section retaining wall, 10 ...
Upright version, 11...bottom version.

Claims (1)

[Scope of utility model registration request] Assemble the reinforcing bars protruding from the edge formed at the top corner of the bottom plate of the corner retaining wall by welding or bundling, and pour concrete onto the assembled reinforcing bars in the opposite direction to the direction of the resultant earth pressure. An anti-slip structure for corner retaining walls characterized by a protruding auxiliary plate integrally formed with the bottom plate.