JPH1046508A - Construction method of overhung footpath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently use a site on the mountain side, to reduce sediment quantity for backfilling and to reduce cost by providing a footpath on a face of slope of a road-way by using a block for a retaining wall erected from a bottom base part and provided with an inclined part to the valley side on an upper part. SOLUTION: A block 1 for a retaining wall is constituted by integrally forming a bottom base part 2 and a wall plate part 3 having an inclined part 3a largely inlicned to the valley side. The top part of the wall plate part 3 is made as a falling preventive belt 5 provided with a hole 6 of a handrail setting mechanism. At the time of extending a footpath 10 on a face of slope S of a road-way 11, firstly the face of slope S is drilled, secondly grading is carried out, broken stone foundation, concrete subslab foundation, etc., are carried out, and a large number of the blocks 1 for the retaining wall are laid on them by connecting them to each other. Thereafter, backfilling is carried out in a state where the falling preventive belt 5 is projected on the ground, and the footpath 10 is formed by applying pavement. A pole is inserted into the hole 6 of the falling preventive belt 5, fixed with mortar, and a handrail 12 is set. A curb 13 is set on a border with the road-way 11. Consequently, it is possible to efficiently use a site on the mountain side at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of widening a road on a mountain side using a retaining wall block and constructing an overhanging sidewalk in a stepped terrain.

[0002]

2. Description of the Related Art FIGS. 4 and 5 are cross-sectional explanatory views of a sidewalk constructed by a conventional method of constructing an overhanging sidewalk using a retaining wall block. The retaining wall block was constructed where the surface S had been,
It forms a sidewalk. 4 uses a retaining wall block 20 having an L-shaped cross section, and FIG. 5 uses a retaining wall block 30 having a U-shaped cross section.

[0003]

The overhanging sidewalk using the L-shaped retaining wall block 20 shown in FIG. 4 can effectively use the site on the mountain side, but a large amount of backfill soil is required when backfilling the block. Since it is necessary, the construction cost must be high.

As shown in Japanese Utility Model Publication No. 5-38134, the overhanging sidewalk using the U-shaped retaining wall block 30 of FIG. 5 can effectively use the site on the mountain side.
There is an advantage that a small amount of backfill soil is required. However, for example, as shown in FIG. 5, when the width of the sidewalk actually constructed does not match the width of the retaining wall block, the seam 31 appears on the sidewalk and the appearance is poor. In addition, it is inconvenient when it is not desired to expose concrete to the surface of the site on the mountain side (for example, when vegetation is required). The present invention solves this problem by constructing an overhanging sidewalk that can effectively use the mountainside site as a sidewalk, has less backfilling earth and sand, does not expose concrete on the surface of the mountainside site, and can finish any sidewalk surface. It provides a method.

[0005]

SUMMARY OF THE INVENTION The present invention provides a retaining wall block comprising a bottom plate portion and a wall plate portion rising from the bottom plate portion, wherein at least the upper portion of the wall plate portion is an inclined portion inclined toward a valley side. A method for constructing an overhanging sidewalk, comprising connecting and installing a plurality of blocks and backfilling the mountain side of the installed block to form a sidewalk. If a substantially vertical fall prevention band provided with a handrail installation mechanism is provided at the uppermost part of the wall plate portion of the retaining wall block, the installation work of the handrail can be easily performed.

[0006]

According to the method of constructing the overhanging sidewalk of the present invention, at least the upper part of the wall plate portion of the retaining wall block to be used is an inclined portion inclined toward the valley side. Since it is not necessary to backfill the lower side of the wall plate portion, less earth and sand for backfilling is required. After backfilling,
Since no concrete is exposed on the ground on the mountain side, which is the sidewalk, pavement, turf pasting, and free surface treatment can be performed. The width of the sidewalk can be set freely, and there are no seams. Also, compared to the U-shaped block in FIG.
Based on the principle that the hypotenuse of the triangle is shorter than the sum of the other two sides, the amount of concrete and the amount of rebar are small, and the weight and cost of the retaining wall block can be reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing an overhanging sidewalk constructed by the construction method of the embodiment. FIG. 1 is an explanatory sectional view of an overhanging sidewalk constructed by the method of the embodiment, FIG. 2 is a side view of a retaining wall block 1 used in the method of the present invention, and FIG. 3 is a rear view of the retaining wall block 1.

As shown in FIG. 2 and the like, the retaining wall block 1 comprises a bottom plate 2 and a wall plate 3 which are integrally formed. The wall plate portion 3 rises from the bottom plate portion 2, and the upper portion thereof is an inclined portion 3a which is largely inclined toward the valley side. A pillar-shaped or beam-shaped reinforcing portion 4 is integrally formed on the back surface of the wall plate portion 3 for reinforcement. The uppermost part of the wall plate part 3 is a fall prevention band 5 formed substantially vertically. A hole 6 is provided in the fall prevention band 5 as a handrail installation mechanism.

As a preparation for installing the retaining wall block, an appropriate land operation such as excavation, leveling, splitting, and abandoned concrete operation is usually performed on the location. Block 1 for retaining wall
Are connected and laid on the local business, for example, as shown in FIG. FIG. 1 shows that a sidewalk 10 is added by constructing a retaining wall block 1 on a slope S of a roadway 11. After laying the retaining wall block,
Has been backfilled to project above the ground and paved to make it a sidewalk. A pole is inserted into the hole 6 of the fall prevention band 5 and fixed with mortar, and a handrail 12 is provided. 13 in the figure
Is a curb.

The wall plate portion of the retaining wall block used in the present invention can be inclined not only at the upper part but also at the entire valley side. When the height of the wall is high, it is preferable that only the upper portion be an inclined portion as in the embodiment. In the embodiment, the position where the wall plate portion of the bottom slab stands is almost at the center as shown in FIG. 2, but this can be changed depending on the situation.
It can also be raised from the right end of the bottom plate portion in FIG. The reinforcing portion 4 can be provided on the opposite front side. In some cases, the thickness of the wall plate portion is further increased to increase the strength, and the reinforcing portion 4 can be omitted.

[0011]

According to the present invention, the site on the mountain side can be used effectively, and the amount of earth and sand for backfilling can be reduced. After backfilling, no concrete is exposed on the ground side of the mountain, so that paving, turf pasting, and surface finishing of the sidewalk can be freely selected. The width of the sidewalk can be set freely, and there are no seams. Further, compared to the case of using a conventional U-shaped block, the amount of concrete and reinforcing bars in the block can be reduced, and the weight and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of an overhanging sidewalk constructed by the method of the present invention.

FIG. 2 is a side view of the retaining wall block 1. FIG.

FIG. 3 is a rear view of the retaining wall block 1. FIG.

FIG. 4 is an explanatory sectional view of an overhanging sidewalk constructed by a conventional method.

FIG. 5 is an explanatory sectional view of an overhanging sidewalk constructed by a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Retaining wall block 2 Bottom plate part 3 Wall plate part 3a Inclined part 4 Reinforcement part 5 Fall prevention band 6 Hole 10 Sidewalk 11 Roadway 12 Handrail 13 Curbstone 20 Retaining wall block 30 Retaining wall block 31 Joint

Claims (2)

[Claims] 1. A plurality of retaining wall blocks comprising a bottom plate portion and a wall plate portion rising from the bottom plate portion, wherein at least an upper portion of the wall plate portion is an inclined portion inclined toward a valley side, and is connected and installed. Method for constructing a sidewalk by backfilling the mountain side of a damaged block to form a sidewalk 2. The method for constructing an overhanging sidewalk according to claim 1, wherein the retaining wall block has a substantially vertical fall prevention band provided with a handrail installation mechanism at an uppermost portion of the wall plate portion. Method of constructing an overhanging sidewalk by installing handrails