JPS62296015A - Simple latticework construction work - Google Patents

Abstract

PURPOSE:To shorten the period of construction as well as cut down the cost of construction by a method in which a net attached with frames in parallel at a given interval in the horizontal direction is laid on a slope, and the frames in the horizontal direction are connected with vertical frames and fixed with anchors. CONSTITUTION:A net 1 with frames 3 with cuts 9 attached in parallel at a given interval in the horizontal direction is combined with vertical frames 4 with cuts 9 on a slope 8 by coupling the cuts 9 mutually to form a latticed frame. The latticed frame is set on and fixed to the slope by anchors 5. A vegetating work such as spraying of seeds, etc., is applied by placing soil or vegetating soil bags are set in the latticed frame in order to stabilize the slope 8 in the earlier period. The operations can thus be simplified and the safety of the slope can be raised.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an application method of slope stabilization method for reducing entanglement in civil engineering work.

(Conventional technology) In recent years, the natural environment has undergone major changes due to road development, housing development, landslides caused by natural disasters, etc., and there is an urgent need to restore destroyed slopes. We have been working on natural restoration by stabilizing the slope using the Hōbō method and the Kakuchimei method. However, there are many slopes that cannot be stabilized with simple greening methods such as seed spraying, and as a countermeasure, there is the Hocho construction method, in which mold pieces are assembled on the slope and concrete is poured in to stabilize the slope using weight. This is a construction method that has a limited scope of application because the construction is too large and the construction cost is high, and the weight of the slope can cause slope collapse on soft ground. Therefore, as a construction method that stabilizes slopes with light weight and relatively low construction costs, the lattice piece method, which divides the slope into small sections, has been widely adopted. This is a slope stabilization method using lightweight lattices that combines the earth retaining effect of the lattice system and the drainage effect of the drainage ditch, and is currently widely used.

Furthermore, C against earth pressure can be made lighter during construction by driving Z into the slope and connecting lattice pieces and P9. This lattice piece is a truly significant construction method. However, even if the lattice pieces are lightweight, they are easy to move on the slope, and it takes time to assemble the grid. Of the construction work for the lattice pieces that sag toward the foot of the slope, assembly and positioning work account for a large amount of labor costs. Furthermore, since the work of assembling and positioning the grid pieces is done on a slope, work on a slope with a slope is different from work on flat ground.
This is a painful task that can cause workers to feel fatigued, so if labor savings such as reduction of construction costs and construction period are achieved by simplifying the work, the lightweight lattice frame construction method will become more popular. It is believed that demand can be created.

(Problems to be solved by the invention) The problems to be solved by the invention are that the work is easy and fast;
Furthermore, it is an object of the present invention to provide a lightweight grid piece that is excellent in safety on slopes.

(Means for solving the problem) The present invention is adopted as a means for solving the above problems.
In this method, in addition to providing a net or a water-permeable sheet in which the horizontal frame members of the lattice are attached in parallel at regular intervals in advance, it can be easily connected to the horizontal luxury materials. The purpose of this invention is to provide a vertical frame of lattice pieces.

(Function) After spreading the net (1) or water-permeable sheet (2) to which the horizontal % coating material (3) is attached on the slope, cut the horizontal q top material (3) and the vertical piece (4) ( 9), and after fixing to the slope (8) with anchors (5), soil (6) is applied and greening methods such as seed spraying (6) are used on the surface.

(Construction Example) The present invention will be explained below according to an example. As shown in Fig. 1, the simple lattice piece construction method of the present invention consists of horizontal frame members (3) having notches (9) arranged in parallel at regular intervals. The net (1) attached to the net (1) and the notch (
By aligning the notches (9) on the slope (8) as shown in Figure 4 with the vertical well (4) having a vertical well (9), a lattice-like loaf is formed and Length 30 pieces ~
This is a construction method in which the case +i is installed on the slope (8) by appropriately fixing it with an anchor (5) of 100α.

The horizontal frame material (3) and Hiroto (4) are made of waste bras such as polyethylene or polypropylene.
As long as it's lightweight and has the same strength as a discarded bra, you don't have to worry about it. The earth retaining thickness of the frame material can be selected from 2crn to 15α depending on the site situation.

Regarding the material of the net (1), it is woven from threads such as polyethylene, polypropylene, etc., and has a structure that can withstand Tonosho with the anchor (5). As long as it is strong enough not to interfere with the assembly and positioning of the material (3) and the vertical frame (4), there are no particular restrictions on the line of the thread, the size of the mesh, or the structure of the net.

Furthermore, after installing the lattice pieces on the slope (8), as shown in Figure 6, after applying soil (6), greening methods such as seed spraying (7) are also used, but instead of soil (6). The slope (8) will be stabilized at an early stage by laying vegetation sandbags within the slope.

In addition, the standard spacing between the horizontal q cold materials (3) is 100ff, but if you want to make the horizontal spacing between the cold materials (3) closer due to memorial services or slopes, use the slope (3) as shown in Figure 8. 8) In the notches (9) of the vertical pieces (4) of the lattice hoof that have already been installed, make the notches (9) of the horizontal strips (3) that are not attached to the net (1) as shown in Figure 2. ), the interval easily becomes 50α.

In addition, in the present invention, the embodiment is a horizontal frame member (3)
and! The connection with lr@-(4) is by fitting in the notch (9), but instead of fitting in, a separate connector may be used. 3
), the notch (9) is not necessarily required in the horizontal frame member (3) attached to the Neff (1) or the water-permeable sheet (2). Moreover, instead of the net (1), depending on the conditions of the slope (gradient, legal requirements, soil quality, etc.), a water-permeable sheet (2) as shown in FIG. 7 may be used.

(Effects) As described above, according to the simple lattice frame construction method of the present invention, by simply rolling out the net (1) or the permeable sheet (2) from the shoulder of the slope onto the slope (8), surveying and anchors (5 ), the horizontal position of the frame material (3) can be determined without fixing the frame material.
The position where the vertical q (4) should be installed is automatically determined just by working on the shoulder of the slope, and what's more, the horizontal frame material (3) and the vertical J bamboo (4) can be easily determined. In addition to saving labor and significantly reducing construction costs because they are combined,
Even on steep slopes where conventional Kakusensho could not be constructed, it is now possible to use Mekaku+jfl=, which can be easily constructed, on slopes where it was not possible due to the budget or because of the steep slope. It is thought that it will have a great industrial effect because it will create demand for. - As an example, when we calculate the labor costs for the 10α Atsuki Soil method on a cut slope with soft soil in a comparison of 10% latticework, we find that with a conventional concrete lattice frame, 1o
Approximately 30 people per orn, and even lightweight plastic grids with relatively low construction costs cost approximately 13 per 100 m.
It takes a human ball. In comparison, in the simple lattice frame of the present invention, the labor cost is about 9.0 man-hours per 100 rn'.

Furthermore, with the conventional lattice grid, it is assembled from below according to the foundation block and fixed with anchors (5), otherwise it will shift downward, so a separate foundation block is required, but the simple lattice of the present invention Rather than constructing the frame from the bottom,
If the net (1) or permeable sheet (2) is deployed from the shoulder of the slope, there is no need to worry about the horizontal pieces (3) shifting downward, so foundation blocks are not required during construction, making the construction process cheaper. This is done.

Furthermore, on slopes with poor conditions, the simple lattice frame construction method of the present invention halves the horizontal spacing of the frame members (3), and in addition to the effect of directly retaining earth and sand, the slope (8 ) In addition, it is possible to increase the earth retaining effect by reducing the velocity of rainwater flowing on the surface layer with simple work. If you use the 1st risk construction method, compared to the conventional lattice J volume, drainage will be carried out over the entire surface, so
Because it has excellent drainage effect, the synergistic effect of the earth retaining effect of the frame material and the drainage effect of the permeable sheet (2') allows it to be used on long slopes and soft slopes that were considered impossible to stabilize with conventional lattice structures. The simple lattice frame construction method of the present invention can shorten the construction period and reduce construction costs because it can be constructed on unstable slopes such as ground, steep slopes, and slopes in areas with particularly high rainfall. , on steep slopes where it is difficult to work with conventional lattice frames (gradients of 8 minutes and up)
In addition to improving workability (6 minutes), the safety of slopes, which cannot be stabilized with conventional lattice knees, can be stabilized due to the synergistic effect of the earth retaining effect and drainage effect.
This is a truly significant invention as it will create a huge new demand.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a state in which a net to which horizontal strips of the lattice frame according to claim 1 are attached is unfolded on a slope. 2) A perspective view of a horizontal frame member according to claim 4. FIG. 3 is a perspective view of the vertical fastening described in claim 1. FIG. 4 is a front view showing a state in which the simple lattice leaf according to claim 1 is assembled on a slope and fixed with anchors. FIG. 5 is a sectional view taken along line AA in FIG. 4. 6th
The figure is a longitudinal sectional view showing a state in which the simple lattice pieces described in claim 1 are assembled on a slope, fixed with anchors, and then soil is added and the surface is subjected to a greening method. FIG. 7 is a vertical cross-sectional view showing a state in which the simple lattice pieces described in claim 2 are assembled on a slope surface, fixed with anchors, and then soil is added and a greening method is applied to the surface. FIG. 8 is a front view showing a state in which horizontal σ frame members are arranged more densely after the lattice frame according to claim 1 is assembled on a slope. Explanation of symbols 1...Net 2...Water permeable sheet 3...Horizontal tightening 4...Vertical beam 5...Anchor 6...・Relief soil 7...Press spraying 8...Slope surface 9...Incision Patent applicant Nissin Sangyo Co., Ltd.'i4sriJ

Claims (2)

[Claims] (1) After the horizontal frame members of the earth retaining lattice frame are installed in parallel at regular intervals on the slope, the vertical frames are already set on the slope. By connecting to the frame material in the direction, a frame is assembled in a grid pattern on the slope,
A simple lattice frame construction method in which the lattice frame is fixedly installed on a slope by appropriately fixing the lattice frame with anchors. (2) A simple lattice frame construction method using a water-permeable sheet instead of the net described in claim 1.