JPH0522009B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a construction method for constructing a structure such as a road embankment by heaping earth and sand on a foundation ground.

[Technical background of the invention and its problems]

When building a road embankment, it is common to first pile up earth and sand on the foundation ground to form a layered embankment, and then compact this embankment to form an embankment.
Depending on the nature and condition of the foundation ground, the stability of the embankment may be poor, resulting in subsidence or slipping. In order to prevent this, it is common practice to lay sandbags or futon baskets on the foundation ground in advance, and to pile up earth and sand on top of them. However, such a method requires a considerable amount of labor since it is necessary to bring the sandbags and futon baskets to the construction site and arrange them one by one at predetermined positions.

Therefore, the applicant spread a net of an appropriate length on the areas corresponding to both sides of the embankment, filled the net with earth and sand so that a margin remained on the outside of the net, and then filled the margin with earth and sand. The first stage of foundation embankment is formed by bending it to the top side and covering the side part (slope part) of the earth and sand, and then the second, third, or higher foundations are built on top of it in the same way. We developed a method of forming embankments in stages and constructing embankments using these foundation embankments. According to this method, there is no need to use sandbags or futon baskets.
A stable embankment can be easily constructed.

However, even in the case of an embankment constructed in this way, since the side parts are only covered with mesh, over a long period of time, the side parts bulge outward and reach the center part of the upper surface of the embankment. There was a problem that uneven settlement occurred.

[Purpose of the invention]

The present invention has been made with attention to these points, and its purpose is to prevent the deformation of the side parts of the embankment and reliably suppress uneven settlement in the central part over a long period of time. The purpose of the present invention is to provide a method for constructing road embankments, etc., which allows for

[Summary of the invention]

That is, in the present invention, a mesh body is spread out on the foundation ground, earth and sand is piled up on this mesh body so as to leave margins on both sides, and then each of the above-mentioned margins is spread from the sides of the earth and sand to the top surface. The first stage of foundation embankment is formed by enveloping the entire earth and sand by bending, and the foundation embankment is similarly formed step by step on top of this first stage of foundation embankment, and the side parts of these foundation embankments are A concrete side wall material is provided, and a filament is inserted and latched from the side wall material to the foundation embankment of each level.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

First, on the foundation ground a of the construction site, as shown in Fig. 1, mesh fabrics 1a, 1b, 1c, etc. of appropriate dimensions are placed.
are spread so that their peripheral edges overlap, and the overlapping portions are connected using coiled connectors 2, etc., to form an integral netting body 1. Then, earth and sand 4 is piled up to a certain thickness on the upper surface of this mesh body 1 so as to leave margins 3, 3 on both sides thereof (Fig. 2A). After that, the margins 3, 3 of the mesh body 1 are bent inward, and placed along the top surface of the earth and sand 4 to cover the entire earth and sand 4, and compacted to form the first stage of foundation embankment 5a. form [Figure B]. Note that the earth and sand 4 may be compacted and then covered with the mesh body 1.

On the foundation ground a at the construction site, side wall foundations 6, 6 are previously provided with concrete or the like at portions corresponding to both sides of the foundation embankment 5a. After forming the foundation embankment 5a, side wall materials 7a, 7 made of precast concrete etc. are placed on these side wall foundations 6, 6.
Install a. From these side wall materials 7a, 7a,
Anchor bolts 8, 8 are inserted as linear bodies toward the foundation embankment 5a, and these anchor bolts 8, 8
The side wall materials 7a, 7a are pressed and fixed to the side surfaces of the foundation embankment 5a.

After forming the first stage of foundation embankment 5a in this way, the mesh body 1 is spread on the top surface of this foundation embankment 5a in the same way as the first stage, and earth and sand 4 is piled up [see figure C]. The margins 3, 3 of the mesh body 1 are bent to cover the earth and sand 4, and compacted to form the second stage foundation embankment 5b, and the second stage foundation embankment 5b is
Based on the first stage side wall materials 7a, 7a, second stage side wall materials 7b, 7b similar to the first stage side wall materials 7a, 7a are installed on both sides of the structure, and are fixed via anchor bolts 8, 8, respectively [FIG. . Thereafter, the foundation embankments 5c, 5c and side wall materials 7c, 7c of the third and fourth stages are similarly installed step by step to construct an embankment of a predetermined height [FIG. 4E].

According to such a method, the entire earth and sand 4 of each stage is covered and integrated with the mesh body 1, and both sides of the earth and sand 4 are reinforced with side wall materials 7a, 7b...
As a result, deformation of the side portions of the embankment is prevented, and accordingly, the central portion becomes robust, thereby making it possible to reliably suppress uneven settlement of that portion over a long period of time.

In addition, as shown in FIG. 3, the side wall material 7a disposed on the lowest layer may be fixed to the side wall foundation 6 using bar steel anchors 10, or as shown in FIG. may be formed in advance, and the lower end edge of the side wall material 7a may be fitted into this groove 11 to fix the side wall material 7a to the side wall foundation 6. In addition, as shown in Fig. 5, the foundation embankment 5a...
One side wall material 7a placed on both sides of... is passed through its foundation embankment 5a... to the other side wall material 7a...
A PC strand or wire rope 12... is inserted as a filament into..., and both ends thereof are hooked to the side wall materials 7a, 7a... by wedges or mortar injection, and the side wall materials 7a, 7a... are used as a foundation. It may be fixed to the embankment 5a... Furthermore, after building the foundation embankment 5a, concrete may be placed on the sides thereof, and the concrete may constitute an integral side wall material.

〔Effect of the invention〕

As explained above, according to the present invention, the constituent earth and sand of the embankment are integrated with the mesh body, and the side parts are reinforced with concrete side wall materials, so that deformation of the side parts can be prevented. This has the effect of reliably suppressing uneven settlement of the central portion of the embankment over a long period of time.

Since the stripes are inserted and hooked from the side wall material provided on the side of the foundation embankment to the foundation embankment of each level, the side wall materials and the foundation embankment are firmly connected to each other by each stripe. This prevents displacement of the side wall material relative to the foundation embankment and uneven settlement between the foundation embankment and the side wall material, making it possible to construct an even more robust embankment.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a plan view of the mesh body laid on the foundation ground, Fig. 2 is a sectional view showing the work process of embankment construction in order, and Fig. 3 is a side wall construction. FIG. 4 is a cross-sectional view showing a means for fixing the side wall material to the foundation; FIG. 4 is a cross-sectional view showing another means; FIG.
The figure is a sectional view showing the means for fixing the side wall material to the foundation embankment. 1... Net body, 3... Margin, 4... Earth and sand, 5
a, 5b, 5c, 5d...foundation embankment, 7a, 7
b, 7c, 7d...Side wall materials.

Claims (1)

[Claims] 1. Spread a net on the foundation ground, fill it with earth and sand so as to leave margins on both sides of the net, and then bend each of the above margins from the sides of the earth and sand to the top. The first stage of foundation embankment is formed by covering the whole of the foundation embankment, and on top of this first stage of foundation embankment, foundation embankment is similarly formed in stages, and concrete side walls are installed on both sides of these foundation embankments. 1. A method of constructing a structure such as a road embankment, which comprises: providing a material for a road embankment, and inserting and hanging a filament from the side wall material to the foundation embankment of each level.