JPS6261733B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for protecting slopes, etc., which is constructed to prevent the collapse of rocks on slopes such as mountainsides, etc., and relates to materials that can be made relatively small and lightweight. The purpose of the present invention is to provide a construction method that can easily form a beautiful protective layer with a substantially uniform thickness that corresponds to the bending of a slope, etc.

As shown in Figure 1, the conventional protection method of forming a protective layer on the slope of a mountainside, etc. is to place a protective layer made of wood or metal plate on the exposed slope B of the rock of the mountain A. formwork C is installed in a row, and the space D between slope B and formwork C is
For this purpose, a method of filling with mortar, concrete, etc. is used.

With this construction method, if the construction site is located at a steep location high up in the mountains, it becomes extremely difficult to transport and install the formwork C, and in some cases, it may be necessary to install a ropeway for transport. It has the disadvantage of requiring large labor and equipment costs, and furthermore, formwork C
Since it is difficult to adapt the installation surface to the unevenness of the slope C, an unnecessary amount of concrete is used in the areas indicated by symbols E, F, G, etc. in FIG. 1, resulting in waste of materials.

As an alternative to the above-mentioned conventional construction method, for example, as shown in Japanese Patent Publication No. 11011/1982 or Japanese Patent Publication No. 8247/1987, two upper and lower fabrics are sewn into a bag shape, and the inside of the bag is sewn into a plurality of layers. A construction method has also been proposed in which the sections are divided into sections and each section is filled with mortar, concrete, etc., but it is difficult to place reinforcing bars in the layer of filled mortar, concrete, etc., and it is also difficult to apply vibration. In addition, since the lower surface of the bag and the slope are not connected, there is a problem in integrating the slope and the formed protective layer.

As described in the claims, the present invention involves embedding and fixing anchor bolts at regular intervals in the longitudinal and lateral directions on a slope, etc., and then forming numerous pores that allow water to pass through but do not allow cement particles to pass through. A sheet having a shape is connected to the anchor bolt via a connecting body, and the distance between the slope, etc. and the sheet is regulated to a predetermined dimension by the length of the anchor bolt and the connecting body, and the periphery of the sheet is sealed. Then, by filling mortar, concrete, etc. between the sheet and the slope, etc., and hardening it, the formwork is made of a flexible sheet, anchor bolts, etc. Since only the connecting body and the material for sealing the periphery of the sheet are needed, no matter where the construction site is, it is possible to save labor costs, equipment costs, etc. required for transporting and installing the formwork, and it is also easy to install. It can be easily applied regardless of the size of the area, the slope of the slope, the thickness of the protective layer, or the fluidity of mortar, concrete, etc. Furthermore, air can escape along with water from the sheet surface, so there is no air bubbles. In addition to being able to form a protective surface free from scratches, the curing period can be shortened by draining excess moisture, and further, by transferring the sheet surface, the surface of the protective layer can have a diffused reflection function.

In addition, it is not only easy to spread the sheet on-site, but it is also possible to attach reinforcing materials such as reinforcing bars using anchor bolts, and to apply vibration when filling with mortar or concrete. This also has the advantage of requiring almost no leveling of the slope.

The configuration of the present invention will be described below with reference to illustrated examples.

FIG. 2 is a schematic cross-sectional view showing a state in which a protective layer 3 is formed on a slope 2 of a ground 1 by the protection work according to the present invention. The anchor bolts 4 are connected at approximately constant intervals (W).
is embedded and fixed, and has numerous pores that allow water to pass through but do not allow cement particles to pass through. A flexible sheet 5 is connected to the anchor bolt 4 via a connecting body 6. The distance H between the slope 2 and the sheet 5 is regulated to approximately a predetermined dimension by the connecting body 6.

And, between the slope 2 and the sheet 5, the sheet 5
The space between the slope 2 and the sheet 5 is filled with mortar, concrete, etc. 8 and hardened.

FIG. 3 shows an example of a sheet 5 used in the present invention, in which a sheet 9 made of a woven fabric of synthetic fibers with low elasticity has floating tissue portions 10 formed at regular intervals on both the front and back surfaces. In the illustrated example, in the portion 11 between the floating tissues 10, the floating tissues are formed on the back side of the page, and the tissue density of the sheet 9 is set to a density that allows water to pass through but does not allow cement particles to pass through.

FIG. 4 is a schematic cross-sectional view of the state in which the present invention is implemented using the sheet 9 shown in FIG. After embedding and fixing at a constant interval W, the core iron rod 12 is inserted and arranged using the floating tissue part 10 of the sheet 9, and the core iron rod 12 and the hook part 13 of the anchor bolt 4 are connected to a wire rope connected body. 6, and the distance H between the slope 2 and the sheet 9 is the length of the anchor bolt 4 and the connecting body 6.
The figure shows a state in which it has been regulated to approximately a predetermined size.

Figure 5 shows the sheet 9 stretched as shown in Figure 4.
This is an example of a structure for sealing the peripheral edge 14 at the lower end of the structure, in which a concrete foundation 15 is formed on the ground 1, anchor bolts 16 are fixed, and the entire edge 17 of the peripheral edge 14 is sealed.
is passed through the anchor bolt 16 and wound around the pipe 18, and then a square piece of wood 19 is placed through the anchor bolt 16, the remaining end 17 and the end 20 of the sheet 9 are held down, and the nut 21 is screwed. Then, the peripheral edge 14 is brought into close contact with the concrete foundation 15 and sealed.

The left and right edges of the stretched sheet 9 may be sealed with the structure shown in FIG. 5, or side plates with a width corresponding to the distance H between the slope 2 and the sheet 9 may be arranged,
The left and right edges may be fixed and sealed to this side plate,
There are no particular limitations on the sealing structure around the periphery of the sheet 9.

Between the sheet 9 stretched and sealed as shown in FIGS. 4 and 5 and the slope 2, mortar or is filled with concrete 22 and hardened. Although the sheet 9 is shown in a bulged state in FIG. 6 due to its elongation, this degree of bulge can be reduced by reducing the elongation of the sheet 9.

As is clear from FIG. 6, only the anchor bolts 4 and the connecting body 6 are present between the slope 2 and the sheet 9, so reinforcing bars, laths, etc. are interposed in this space, and a protective layer is formed. It is easy to strengthen it, and it is also possible to use a vibrator.

Since the sheet 9 has countless pores that allow water to pass through, air between the slope 2 and the sheet 9 is effectively degassed during filling with the concrete 22, and air bubbles are formed on the concrete surface in contact with the sheet 9. Moreover, since excess moisture is also drained away, the initial strength of the concrete 22 is high and the curing period is shortened.

After the concrete 22 hardens, the sheet 9 is peeled off, and in the illustrated example, the floating structure 1
Peeling is performed by first cutting 0.

After peeling, the texture of the sheet 9 is similar to that of the concrete 2.
It is transferred to the surface of 2, producing the effect of diffusely reflecting light rays. Since the peeled sheet 9 is turned over and used again, it is possible to utilize the material.

FIG. 7 shows another embodiment, in which the anchor bolt 4 is embedded and fixed in the slope of the ground 1, which is the same as the above-mentioned embodiment, but in the connection structure between the sheet 23 and the anchor bolt 4, the above-mentioned This is different from the embodiment.

That is, in this embodiment, a group of bag portions 24 are formed in a flexible sheet 23 having countless pores that allow water to pass through but not cement particles. A plate material 25 such as a flexible plate is inserted, and a retaining bolt 27 connected to the anchor bolt 4 via a wire 26 is inserted into the plate material 25.
is penetrated and fixed, and then projected to the surface side of the sheet 23, and the presser pipes 28 and 29 are brought into contact with the surface of the sheet 23, and the position is regulated with a washer 30.
By tightening with nuts 31, a reinforcing material is formed on the surface of the sheet 23. Holder pipe 28, 2
9 is fixed to the ground 1 side at both ends of the sheet 23 in the width direction with another anchor bolt or the like. In this embodiment, due to the presence of the holding pipes 28 and 29,
Since it can supplement the strength of the wire 26, retaining bolt 27, and sheet 23, it is effective when the distance between the slope 2 and the sheet 23 is extremely long.
This allows the surface shape of the connecting portion to be flat.

The present invention has the structure and operation described above, and only the flexible sheet, anchor bolts, connecting body, and material for sealing the periphery of the sheet are used as the formwork. Therefore, regardless of the location of the construction site, the labor and equipment costs required for transporting and installing the formwork can be reduced.
In addition, it can be easily constructed regardless of the size of the construction area, the slope of the slope, the thickness of the protective layer, or the fluidity of the mortar, concrete, etc. Furthermore, it allows air to escape along with water from the sheet surface. Therefore, a bubble-free protective surface can be formed, and the curing period can be shortened by draining excess moisture, and furthermore, the protective layer surface can have a diffused reflection function by transferring the sheet surface.

In addition, it is not only easy to spread the sheet on-site, but also reinforcing materials such as reinforcing bars can be attached using anchor bolts, and vibration can be applied when filling mortar or concrete. Furthermore, it also has the advantage of requiring almost no leveling of the slope.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional view showing the protective layer formed by the conventional method, Fig. 2 is a schematic longitudinal cross-sectional view showing the protective layer formed by the method of the present invention, and Fig. 3 is a schematic longitudinal cross-sectional view showing the protective layer formed by the method of the present invention. FIG. 4 is a plan view of an example of a sheet, FIG. 4 is a schematic longitudinal cross-sectional view of only the main parts showing the stretched state of the sheet in an example of the implementation of the present invention, and FIG. 5 is an example of a sealing structure around the sheet periphery. FIG. 6 is a schematic vertical cross-sectional view showing the structure of a protective layer formed according to the present invention, and FIG. It is a schematic longitudinal cross-sectional view. 2... Slope, 3... Protective layer, 4... Anchor bolt,
5... Sheet, 6... Connecting body, 7... Periphery, 8... Concrete, H... Distance between slope and sheet.

Claims (1)

[Claims] 1 After embedding and fixing anchor bolts at approximately constant intervals in the vertical and horizontal directions on a slope, etc., a flexible sheet with countless pores that allows water to pass through but does not allow cement particles to pass through is attached to the connecting body. The distance between the slope, etc. and the sheet is regulated to approximately a predetermined dimension by the length of the anchor bolt and the connecting body, and the periphery of the sheet is sealed. A method of protecting slopes, etc., characterized by filling mortar, concrete, etc. between the slopes, etc. and letting it harden.