JPH07180157A - Slope protection method - Google Patents

Abstract

PURPOSE:To eliminate the cutting down of trees already planted on a slope or the excavation of a deep ditch by arranging flexible tubes containing reinforcing materials on a slope to be protected, and anchoring them with anchorage devices. CONSTITUTION:Flexible plastic tubes 4 having insides reinforced with reinforcing materials 3 are arranged on a slope 1 to be protected, and they are anchored with U-shaped anchorage devices 6 to form frames 5. After that, grout 7 is put in the flexible tubes 4. According to the constitution, slope protection work can be executed without excavating any deep ditch in the slope and without cutting down stress planted thereon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope protection method.

[0002]

2. Description of the Related Art A free frame method is a typical example of this type of slope protection method, in which a wire mesh formwork is placed on the slope, steel bars are installed and anchors are attached, and mortar is placed on top of it. Or it is concrete sprayed.

By the way, in such a free frame construction method, since mortar or concrete is sprayed, rebound and other material separation are likely to occur and weak points are likely to occur, and trees on slopes are cut down during construction. However, there are problems such as having to dig deep trenches, damaging the current situation and reducing green.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the problems of the conventional slope protection construction method as described above, to prevent a weak point on the slope after the construction method, and to execute the construction. It is to provide a slope protection method that does not damage the current situation or reduce the greenery because it is not necessary to cut trees on the slopes or dig deep trenches.

[0005]

In order to achieve the above object, the present invention provides a frame in which a flexible tube containing a reinforcing material is arranged on a slope. Is formed, and the frame is formed by fixing this on a slope with a fixing tool, and then grout is injected into the flexible tube. According to a second aspect of the present invention, in the first aspect of the present invention, the frame is a flexible tube having a U shape along the vertical direction on the slope of the slope, and a grout inlet and outlet are provided. It consists of one provided on the bottom or top of the slope. The invention of claim 3 is
In the invention of claim 1 or 2, the reinforcing material is made of steel wire. According to a fourth aspect of the present invention, in any one of the first to third aspects, the flexible tube is a plastic tube. The invention of claim 5 is the invention of any one of claims 1 to 4, wherein the grout is mainly composed of cement. Claim 6
Of the invention, a double flexible tube in which an inner tube formed by winding a spiral reinforcing material around the outer circumference is fitted with an outer tube with a gap in the middle is arranged on the slope and a frame is formed. After being formed on the slope, the primary grout is injected into the inner tube, and then the secondary grout is injected into the outer tube. According to a seventh aspect of the invention, in the sixth aspect of the invention, the inner and outer tubes are made of plastic tubes. The invention of claim 8 is the invention of claim 6 or 7.
In the invention, the grout is made of cement as a main material. According to a ninth aspect of the invention, in the invention according to any of the sixth to eighth aspects, a large number of small holes are provided on the outer circumference of the outer tube. The invention of claim 10 is the invention of claim 6.
In any one of the inventions 1 to 9, a linear reinforcing material is provided on the outer circumference of the inner pipe. The invention of claim 11 is the invention of any one of claims 6 to 10, wherein the helical reinforcing material is made of steel wire or hard fiber wire, and the linear reinforcing material is made of steel wire.

[0006]

In the present invention as described above, the inventions of claims 1 to 6 are such that when the construction is carried out, the planted tree is left as it is without digging a deep groove in the slope and the tree is placed on the slope. With a fairly high density, that is, a small pitch in the middle of the, if the flexible tube is straight or if trees are obstructed, arrange it as a curved line and detour it, and fix it on the slope with a fixing tool and frame it. And then grout is injected into the flexible tube to finish the construction. According to the invention of claims 6 to 10, the inner tube formed by winding a spiral reinforcing material on the outer periphery in place of the flexible tube of the above invention is fitted onto the inner tube with a gap in the middle. This double flexible tube was used to form a frame by arranging this double flexible tube on the slope and fixing it to the slope with a fixing tool. Injection is carried out, and then secondary grout is injected into the outer tube to finish the construction.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the first embodiment of the present invention shown in FIGS. 1 and 2, 1 is a slope on which protection work is applied, 2 is a tree planted there, and a reinforcing material is attached to such slope. A flexible tube 4 containing 3 is placed on the slope 1 to form a frame 5
After being formed and then fixed on the slope 1 by the fixing tool 6, the grout 7 is injected into the flexible tube 4. In this case, the reinforcing material 3 is made of steel wire, the flexible tube 4 is made of plastic tube, the grout 7 is mainly made of cement, and the fixing tool 6 is U-shaped as shown in FIG. Use one.

In the second embodiment shown in FIG. 3, two flexible tubes 4 are connected by a connecting portion 10 to form a frame 5, and a U-shaped fixing tool 11 is used to provide both flexibility. It differs from the first embodiment in that it is fixed across the tube 4 and fixed to the slope 1 by a straight nail-shaped fixing tool 12, but there is no difference in other points, so detailed description will be omitted. As described above, the frame 5 can be modified in various ways, and the fixing tool is not limited to the one described in the drawings and has a function similar to those described above.
It goes without saying that it is acceptable to use other materials.

In constructing the above-mentioned first and second embodiments, the tree 2 that has been planted is left as it is without digging a deep groove in the slope 1 and the tree 2 is cut on the slope. When the flexible tube 4 has a straight line or the tree 2 becomes a hindrance with a considerably high density, that is, a small pitch in the middle, the flexible tube 4 is curved to be circumvented to form the frame 5. In any case, the flexible tube 4 can be linear or curved in various lengths depending on the situation. In this case, the flexible tube 4 having a U shape on the slope of the slope along the vertical direction is used, and if the inlet and the outlet of the grout 7 are concentratedly provided on the lower part or the upper part of the slope, The construction can be extremely facilitated, and it is also preferable to use two groups that intersect diagonally at a substantially right angle. Since the flexible tube 4 arranged in this way only has the reinforcing material 3 inside, the injected grout 7 easily passes through the flexible tube 4 and is filled. The use of the grout 7 which hardly causes material separation such as breathing, etc. forms a frame having remarkably improved reliability and facilitates construction. In the frame thus completed, earth pressure is mainly borne by the reinforcing material 3 in the flexible tube 4.

The third embodiment shown in FIGS. 4 to 6 is a double structure in which an outer pipe 16 is fitted to an inner pipe 15 formed by winding a spiral reinforcing material 17 around the outer periphery with a gap in the middle. Flexible tube 14
In the same manner as in the first embodiment, the frame 5 is formed by arranging the frame 5 on the slope 1, and after fixing the frame 5 on the slope 1 by the fixing tool 18, the primary grout 19 is injected into the inner pipe 15. After that, the secondary grout 21 is injected into the outer pipe 16 to finish the construction. The inner and outer pipes 15 and 16 are made of plastic tubes, and the inner pipe 15 is slightly harder than the outer pipe 16.
Both grouts 19 and 21 consist mainly of cement. A large number of small holes 22 are formed on the outer peripheral surface of the outer tube 16. A linear reinforcing material 23 is provided on the outer circumference of the inner pipe 15, the spiral reinforcing material 17 is made of a steel wire or a hard fiber wire such as aramid fiber, and the linear reinforcing material 23 is made of a steel wire.

When constructing such a third embodiment, the same work as in the first and second embodiments is carried out, but the inner pipe 15 has a spiral reinforcing member 17 and a linear reinforcing member. Material
It is reinforced by 23 to avoid cutting damage, such inner pipe
By injecting the primary grout 19 into the 15, the rigidity of the core is given to give strength to resist the earth pressure, and the outer tube 16 is deformed by the injection pressure of the secondary grout 21 performed thereafter. As a result, the secondary grout 21 that comes into close contact with the ground on the slope 1 and leaks from the large number of small holes 22 penetrates into the ground, and the connection between the ground and the frame 5 is strengthened.

[0012]

The present invention is as described above. According to the invention of claim 1, a flexible tube containing a reinforcing material is arranged on the slope and then fixed on the slope by a fixing tool. After that, since grout is injected into the flexible tube, there is no weak point on the slope after construction method, and it is necessary to cut down trees on the slope and dig deep trenches during construction. Without
The present invention has the effect of not damaging the present condition and reducing the amount of green, and the invention of claim 2 uses a frame in which a flexible tube is U-shaped along the vertical direction on the slope of the slope. However, since the grout inlet and outlet are provided in the lower portion or the upper portion of the slope, there is an effect that the construction can be extremely facilitated. Claims 3, 4,
In the invention of 5, since the reinforcing material is made of steel wire, the flexible tube is made of plastic tube, and the grout is mainly made of cement, the price is low and the handling is easy. It also has the effect of being highly durable. According to the invention of claim 6, a double flexible tube in which an outer tube is fitted to the inner tube formed by winding a spiral reinforcing material around the outer tube with a gap in the middle, is formed on the slope. After arranging and forming a frame, after fixing this on the slope with a fixing tool,
Since the primary grout is injected into the inner pipe and then the secondary grout is injected into the outer pipe, the inner pipe is reinforced by the spiral reinforcing member and the straight reinforcing member to avoid cutting damage. By injecting the primary grout, the rigidity of the core material is given to provide rigidity and resist the earth pressure, and the injection pressure of the secondary grout performed after that deforms the outer tube, It has the effect of closely adhering to the ground. According to the inventions of claims 7, 8, 10 and 11, the inner and outer pipes are made of plastic tubes, and the grout is made of cement as a main material.
Since a straight reinforcing material is provided on the outer circumference of the inner pipe, and the spiral reinforcing material is made of steel wire or hard fiber wire, and the straight reinforcing material is made of steel wire, it is inexpensive and easy to handle. Yes,
In addition, the invention of claim 9 has the effect of being highly durable. Furthermore, since the outer tube has a large number of small holes, the secondary grout that leaks from the outer holes penetrates into the ground and the ground and the frame. This has the effect of strengthening the bond with.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a construction state of a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a fixing state by the fixing tool of the above.

FIG. 3 is a partially cutaway perspective view of a second embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view of a third embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a state at the time of primary grout injection in the above.

FIG. 6 is a cross-sectional view showing a state at the end of construction of the above construction.

[Explanation of symbols]

 1 Slope 2 Tree 3 Reinforcement 4 Flexible tube 5 Frame 6 Fixing tool 11 Fixing tool 12 Fixing tool 14 Double flexible tube 15 Inner tube 16 Outer tube 17 Reinforcing material 18 Protrusion reinforcing material 19 Primary grout reinforcing material 21 Secondary grout reinforcement 23 Reinforcement

Claims (11)

[Claims] 1. A flexible tube containing a reinforcing material is arranged on a slope to form a frame, and the frame is fixed with a fixing tool, and then grout is injected into the flexible tube. A slope protection method characterized by that. 2. The frame uses a flexible tube which is U-shaped along the vertical direction on the slope of the slope,
The slope protection method according to claim 1, wherein the grout inlet and outlet are provided at a lower portion or an upper portion of the slope. 3. The slope protection method according to claim 1, wherein the reinforcing material is a steel wire. 4. The slope protection method according to claim 1, wherein the flexible tube is a plastic tube. 5. The slope protection method according to claim 1, wherein the grout is mainly composed of cement. 6. A double flexible tube in which an outer tube is fitted to an inner tube formed by winding a spiral reinforcing material around the outer tube with a gap in the middle, and the double flexible tube is arranged on the slope. A slope protection method characterized by forming a frame, fixing it on the slope with a fixing tool, then injecting primary grout into the inner pipe, and then injecting secondary grout into the outer pipe. 7. The slope protection method according to claim 6, wherein the inner and outer tubes are plastic tubes. 8. The slope protection method according to claim 6 or 7, wherein the grout is mainly composed of cement. 9. The slope protection method according to claim 6, wherein a large number of small holes are provided on the outer circumference of the outer tube. 10. The slope protection method according to claim 6, wherein a linear reinforcing material is provided on the outer circumference of the inner pipe. 11. The slope protection method according to claim 10, wherein the spiral reinforcing material is made of steel wire or hard fiber wire, and the linear reinforcing material is made of steel wire.