JP3334094B2 - Slope stabilization method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, a free frame method is known as one of slope stabilization methods. In this free frame method, as shown in FIG. 6, a deformable (flexible) wire mesh form 1 and a plurality of reinforcing bars 3 are arranged in a grid on a slope (slope) 5, and each intersection of the reinforcing bars 3 is formed. After the ground anchors are installed, the mortar or concrete is poured on them by spraying method to make the frame 7 as the reinforced concrete structure as shown in FIG. In addition, since the wire mesh form 1 is deformable, it is possible to perform construction even on a slope 5 having irregularities.

[0003]

However, in the conventional blasting work of mortar and concrete in the free frame method, an operator carries a spraying machine and winds a rope lowered from above the slope 5 around the waist. The worker was traveling while moving down the slope 5, which was a heavy labor for the worker.

Therefore, automation of the spraying operation is desired. In the conventional free frame method, mortar or concrete is poured into a wire mesh form 1 or a reinforcing bar 3 projecting from a slope 5 as shown in FIG. Therefore, it is difficult to freely move the spraying machine due to the convex shape of the frame 7, and it has been impossible to automate the spraying operation.

[0005] The present invention has been devised in view of such circumstances, and it is an object of the present invention to improve the conventional free frame method and to provide a slope stabilization method capable of automating the spraying operation of mortar or the like. .

[0006]

In order to achieve the above object, in the slope stabilization method according to the present invention, a groove for forming a frame is formed on the slope in a grid pattern, and a reinforcing bar is inserted into the groove via a spacer. After arranging a wire mesh formwork and spraying mortar or concrete on them, forming a frame as a reinforced concrete structure flush with the slope in the groove, drilling an anchor hole at the intersection of the frame, The grout material is injected, the anchor steel wire is inserted, and then the anchor steel wire is tensioned to form an anchor body in the ground, thereby connecting the frame and the ground.

[0007]

According to the present invention, grooves are formed in a grid on the slope, reinforcing bars and wire mesh forms are arranged in the grooves via spacers, and mortar or concrete is sprayed on these to form grooves in the grooves. After forming a frame as a reinforced concrete structure flush with the slope, drill an anchor hole at the intersection of the frame, and then inject a grout material into the anchor hole and insert a steel wire for anchor. By forming the anchor body in the ground by tensioning the anchor steel wire, the slope can be stabilized.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In FIG. 1, reference numeral 9 denotes a slope on which the method of the present invention is applied. First, the slope 9 is cut using a grooving machine 11 as shown in FIG.
First, a groove 13 is dug in a grid.

The grooving machine 11 digs a groove 13 on the slope 9 by a drum cutter 17 driven by a motor 15.
, A motor 15 and a drum cutter 17 are mounted.
A lever 25 is connected to the drum cutter 17 via an arm 23. By operating the lever 25 in advance, a groove digging depth m by the drum cutter 17 is obtained.
Can be adjusted.

In FIG. 2, reference numeral 27 denotes a weight installed on the tip end side of the base 21, reference numeral 29 denotes a rope for supporting the grooving machine 11 from above the inclined surface 9, and winding and feeding of the rope 29 and drum cutter. The grooving machine 11 moves on the slope 9 by the rotation of 17.

After the lattice-shaped grooves 13 are formed on the inclined surface 9 as described above, the spacers 31 are formed in the grooves 13 as shown in FIG.
And a plurality of reinforcing bars 33 are arranged so as to cross each other.
Further, although not shown, when the formed groove 13 is a ground which is easily collapsed, a wire mesh form similar to that of the related art may be disposed in the groove 13, but the reinforcing bar 33 and the wire mesh form are projected from the slope 9. must not.

Thereafter, a mortar or concrete is poured into the groove 13 in which the reinforcing bars 33 are arranged by a spraying machine to form a frame 35 as a reinforced concrete structure flush with the slope 9 as shown in FIG. . Depending on the situation, the mortar used may be an instantaneous setting.

After the frame 35 is hardened, an anchor hole 37 is drilled at the intersection of the frame 35, a grout material is injected into the anchor hole 37, and a steel wire 39 for anchor is inserted. The frame 39 and the ground are connected by tightening the 39 to form an anchor body in the ground.

The installation of the earth anchor is performed by a known method. In the conventional free frame method shown in FIG. 6, the earth anchor is installed before the mortar is cast. However, in this embodiment, if the anchor holes are drilled and the anchor steel wires 39 are inserted before the mortar is cast, the anchor steel wires 39 protrude from the slope 9, As will be described later, this will hinder the automation of the spraying operation, which is the purpose of the present embodiment.

Therefore, in the present embodiment, as described above, the ground anchor is installed after the frame 35 is formed.
Then, as shown in FIG. 5, by covering the anchor steel wire 39 and covering the fixing portion with the cap 41, the construction of this embodiment is completed.

As described above, according to this embodiment, similarly to the conventional free frame method, the frame 35 as the reinforced concrete structure can be formed even on the uneven slope 9 and the slope 9 can be stabilized by the frame 35. However, in the present embodiment, the frame 35 is mounted on the slope 9
When the mortar or the like is sprayed into the groove 13, the reinforcing bars 33 and the wire mesh form placed in the groove 13 do not protrude from the slope 9. Then, since the construction of the earth anchor was performed after the formation of the frame 35, when the mortar or the like was sprayed, the anchor steel wire 3 was used.
9 does not protrude from the slope 9, as a result, the spraying machine can move freely on the slope 9.

Therefore, according to the slope stabilization method according to the present embodiment, it is possible to automate the spraying machine, which was difficult with the conventional free frame method, and to reduce the burden on the operator.

In the above embodiment, the groove 13 is formed on the slope 9 by using the grooving machine 11, but the means for digging the groove 13 is not limited to the above embodiment.

[0019]

As described above, according to the method of the present invention, grooves for forming a frame are formed in a grid on a slope, and a reinforcing bar and a wire mesh form are arranged in the grooves via spacers. After mortar or concrete is sprayed to form a frame as a reinforced concrete structure in the groove flush with the slope, an anchor hole is drilled at the intersection of the frame, grout material is injected into the anchor hole, and a steel wire for anchor is used. After that, by connecting the frame and the ground by forming the anchor body in the ground by tensioning the anchor steel wire, the conventional free frame method according to the present invention In the same manner as described above, a frame as a reinforced concrete structure can be formed even on a slope having irregularities, and the frame can stabilize the slope. When spraying mortar or the like into the groove, the spraying machine cuts the slope because the reinforcing steel, wire mesh formwork, steel wire for anchors, etc. arranged in the groove do not protrude from the slope. It is possible to move freely.

Therefore, according to the slope stabilization method according to the present invention, it is possible to automate the spraying machine, which has been difficult with the conventional free frame method, and to reduce the burden on the operator.

[Brief description of the drawings]

FIG. 1 is a perspective view of a slope formed with a groove according to an embodiment of the method of the present invention.

FIG. 2 is a side view of the grooving machine.

FIG. 3 is a perspective view of a slope having reinforcing bars arranged in a groove.

FIG. 4 is a perspective view of a slope having mortar sprayed into a groove.

FIG. 5 is a perspective view of a slope on which a frame is formed.

FIG. 6 is a perspective view of a slope showing a construction state of a conventional free frame method.

FIG. 7 is a perspective view of a slope on which a frame is formed.

[Explanation of symbols]

 9 Slope 11 Grooving machine 13 Groove 31 Spacer 33 Reinforcing bar 35 Frame 37 Anchor hole 39 Steel wire for anchor 41 Cap

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 17/20 104 E02D 17/20 106

Claims (1)

(57) [Claims] 1. A groove for forming a frame is formed in a grid on a slope, and a reinforcing bar or a wire mesh form is arranged in the groove via a spacer, and mortar or concrete is sprayed on these to form a reinforced concrete structure in the groove. After forming the object frame flush with the slope, drill an anchor hole at the intersection of the frame, inject a grout material into the anchor hole, insert a steel wire for anchor, and then, A slope stabilization method characterized by connecting the frame and the ground by creating an anchor body in the ground by straining the ground.