JPS6315408B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slope protection method for the purpose of reinforcing and protecting slopes that are prone to collapse, such as mountains and cut slopes.

In recent years, with the progress of building land and road development in mountainous areas, hilly areas, etc., slopes that are at risk of collapse are forming in various places. If these slopes are not completely civil engineered, the collapse of the slopes will lead to serious accidents, so effective slope protection methods are desired in various fields.

Traditionally, this slope protection work has been carried out using various methods depending on the topography and geology of the site, or the local climate, but the conventional method is to lay a ready-made concrete frame on the slope. The most common method was to construct a legal framework by pouring concrete or pouring concrete on-site. These methods have no particular problems when the slope is relatively gentle and the altitude is low and there are no undulations on the slope surface, but since the situation of the slope varies depending on each site, the following methods are applicable. This often results in difficulties such as:

In other words, with the method of laying a ready-made concrete frame as described above, if the slope is extremely undulating, the ground must be leveled before construction, and if the slope is steep or high, the weight Construction was extremely difficult as large concrete frames had to be lifted and laid.

Another method is to install a metal frame such as steel instead of a concrete frame, but in this case as well, construction is not possible unless the undulations of the slope are leveled.
This required a great deal of effort and expense. In addition, when using these ready-made concrete frames, metal frames, etc., it is difficult to firmly attach the legal frame to the ground, and there are cases where gaps are created between the legal frame and the ground. Ta.

On the other hand, the method of forming a legal framework by pouring concrete on site requires the installation of formwork for concrete pouring, so in addition to the assembly and installation of the formwork and the work of arranging reinforcing bars, removal of the
Eradication work was also required, which required a great deal of time, effort, and cost. Moreover, in this case as well, the undulations of the slope had to be leveled to some extent before the formwork was installed.

In addition, when pouring concrete slope frames, instead of installing formwork, core materials such as reinforcing bars and wires are stretched over the area where the slope is to be formed, and then concrete or mortar is poured by spraying, etc. There is also a construction method in which a legal framework is formed. However, in this method of pouring concrete without using formwork, since the area to be poured is not regulated by the formwork, concrete and mortar may spill out and adhere to unnecessary areas, which can be uneconomical. , there is a drawback that the appearance of the legal frame is also poor.

The present invention aims to eliminate the drawbacks of conventional construction methods as described above, and provides a method for constructing slope protection works with excellent appearance and strength using a simple and economical method that avoids complicated construction methods. It was done with the intention of In other words, the slope protection method of the present invention involves forming a plurality of frames made of polygonal strips with appropriate rigidity and fixing short pipes at the corners of the frames by placing a plurality of frames on the slope at required intervals. The gist is to install a slope protection member inside a frame that is fixed and surrounded by the strips, and then to pour concrete between the frames to form a slope. Hereinafter, the details of the configuration of the present invention will be explained based on the embodiments shown in the drawings.

FIG. 1 is a plan view showing one embodiment of a frame body used in the construction method of the present invention, and FIG. 2 is an enlarged side view taken along line A-A in FIG. As seen in the figure, the frame 1 is constructed by forming strips 2 into a polygonal shape and fixing short tubes 3 on the outside of each corner of the polygon. The strip 2 is installed on the slope as described below and has appropriate rigidity to hold the slope protection member inside the frame, and is made of metal or hard synthetic resin, such as a round bar, a square bar, or a band. Although materials such as steel or pipe materials may be used, it is generally preferable to use a metal round bar such as a hot-rolled steel bar having a required diameter in consideration of conditions such as strength, weight, price, and workability. The figure shows an example in which the strip 2 made of metal round bars is formed into a square shape, but this shape is not particularly limited to a square, and depends on the situation of the slope where the construction will be performed. It can be made into any shape, such as a rectangle, trapezoid, rhombus, or triangle, depending on the situation.

Strip material 2 formed into the required polygonal shape as described above
A short pipe 3 is fixed to the outside of each corner by means such as welding. This short pipe 3 may also be made of metal or hard resin, but from the viewpoint of strength, durability, etc., it is preferable to use a metal pipe such as a carbon steel pipe. As shown in Figure 2, the outer surface is welded and fixed. The length (height) of the short pipe 3 is appropriately set according to the height of the slope to be formed, the thickness of the slope protection member described below, etc. The second position is also an appropriate position to hold the slope protection member, but usually the second position is
As shown in the figure, it is welded near the top of the short tube 3.

A plurality of frames 1 configured as described above are fixed on a slope at required intervals, a slope protection member is installed inside the frame 1 surrounded by the strips 2, and a slope protection member is installed inside the frame 1 surrounded by the strips 2. A legal frame is formed by pouring concrete into the space between the frame body 1 and the frame body 1. Fig. 3 is a plan view showing one embodiment of a slope constructed by the construction method of the present invention, Fig. 4 is an enlarged cross-sectional view taken along the line B-B in Fig. 3, and Fig. 5 is a cross-sectional view taken along the line C-C. It is.

To fix the frame 1 on the slope, insert an anchor bolt (anchor pin) 4 into the short pipe 3, drive it into the slope 5, and attach the head 6 to the short pipe 3.
This is done by hooking it on the top and fixing the short tube 3. FIG. 5 shows a situation in which the short tube 3 of the frame body 1 is fixed in this manner.

As the slope protection member installed inside the frame 1 surrounded by the strips 2, a large number of sandbags are usually used, but in some cases, concrete blocks or cobblestones with appropriate dimensions and shapes are used. It is also possible to use a vegetated sandbag with plant seeds attached to the inner surface of the bag in advance. FIG. 3 shows a situation where a large number of sandbags 7 are installed inside the frame 1.

Next, concrete (or mortar) is placed between the frames 1 fixed on the slope 5 in this way to form the slope 8. The pouring may be done by known means such as spraying or pouring, but in this case, the sandbags 7 are held and aligned on the inner surface of the strips 2 of the frame 1, so the outer surface of the sandbags 7 forms a mold for concrete pouring. The frame serves its purpose, the concrete does not flow out into unnecessary areas, and the legal frame 8 is formed in an orderly manner. In addition,
It goes without saying that a core material such as a reinforcing bar or wire may be stretched in the space between the frames 1 prior to the pouring.

The sandbags 7 do not necessarily need to be installed on the entire surface inside the frame 1, and may be installed only on the peripheral edge portions that contact the inner surface of the strips 2, and the sandbags 8 may be placed.
In this case, the slope 5 at the center of the frame 1, which remains without the sandbag 7, may be covered with soil, vegetation, etc. after the sandbag 7 is formed. Note that it is also possible to apply vegetation to the upper surface of the sandbag 7, such as spraying mud mixed with plant seeds, if necessary.

The slope protection method of the present invention is constructed as described above, and has a very remarkable effect of overcoming the drawbacks of the conventional methods as described above.

That is, in the construction method of the present invention, a plurality of frames 1 having a simple structure as described above are fixed on a slope, and a large number of slope protection members such as sandbags 7 installed inside the frames are used instead of formwork to form concrete. is poured to form the legal frame 8. Since the frame 1 used in this construction method is extremely lightweight and easy to handle, it can be easily constructed even when the slope 5 is steep and has a high slope, shortening the construction period and reducing construction costs. . In addition, since the strips 2 forming the frame 1 are made of thin round rods, they are flexible, and even if there are irregularities in the slope, the short pipes 3 at the corners can be connected to the ground using anchor bolts or the like. By fixing it to the mountain, it can be installed to fit the shape of the ground, so the slope frame 8 can be formed in close contact with the surface of the slope 5. Furthermore, since the concrete of the legal frame 8 is regulated by the frame body 1, sandbags 7, etc., a well-ordered legal frame with a good appearance can be obtained.

Although the embodiment shown in FIG. 3 shows an example in which square frames are arranged in a vertical and horizontal lattice pattern, the construction process can be changed by arbitrarily selecting the shape of the frames and their arrangement. It is possible to form a law frame in any form that is adapted to the situation of the power slope. Furthermore, in the present invention, since the part of the slope 5 where the slope 8 is not formed is covered with a protective member such as a sandbag 7, the slope can be sufficiently protected until the vegetation takes hold.

As described above, the present invention does not require the use of ready-made slope frames or formwork as in conventional construction methods, and can easily form highly reliable slope frames according to the topography, effectively improving the slope surface. We were able to provide an extremely superior construction method that can protect the area.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the frame used in the construction method of the present invention, Figure 2 is an enlarged side view taken along line A-A in Figure 1, and Figure 3 is a method constructed using the construction method of the present invention. FIG. 4 is an enlarged sectional view taken along the line BB in FIG. 3, and FIG. 5 is an enlarged sectional view taken along the line CC in FIG. 1... Frame body, 2... Strip material, 3... Short pipe, 4...
Anchor bolt, 5...Slope, 6...Head, 7...
...Sandbag, 8... Law frame.

Claims (1)

[Scope of Claims] 1. A plurality of frames made of strips having appropriate rigidity formed into a polygonal shape and short pipes fixed to the corners thereof are fixed on a slope at required intervals, A slope protection construction method characterized in that a slope protection member is installed inside a frame surrounded by the strips, and further concrete is poured between the frames to form a slope. 2. The slope protection method according to claim 1, wherein the strip is a metal round bar, the short tube is a metal tube, and the short tube is fixed to the strip by welding. 3. Slope protection according to claim 1 or 2, wherein the frame is fixed on the slope by driving anchor bolts inserted through short pipes into the slope ground. Construction method. 4. The slope protection method according to any one of claims 1 to 3, which uses a large number of sandbags as slope protection members.