JP2538528B2 - 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 stabilizing method for stabilizing a slope, and relates to a slope stabilizing method for constructing a structure on the ground to prevent the ground from collapsing. Is.

In order to prevent the ground from collapsing and stabilize the ground, a structure is assembled on the ground and a hardening material is cast to construct a structure, and the structure raises the ground. Construction methods have been developed to prevent trying. However, it is very difficult to assemble a mold on a slope, and in order to construct such a structure, a mold as shown in FIG. 6 has been adopted. That is, first, a plurality of main bars c are arranged so as to be parallel to each other, and the main bars c are surrounded from above and below the main bars by a stirrup d that is divided into two in a U shape,
A metal mesh-like form plate a was erected on the right and left sides and connected by a connecting steel material b.

[0003]

The greatest problem of the above-mentioned conventional construction method is to dispose the long main bars c while keeping them parallel to each other. That is, it is extremely difficult to dispose the long main bars c in parallel without sagging, and it is necessary to dispose the main bars c while supporting them with something, and the construction work requires a lot of labor.

This is also due to the use of the above-mentioned two-divided stirrup muscles d, so that the overlapped portion of the stirrup muscles d becomes longer along with the loosened main muscles c, and the stirrup muscles d extend vertically It was contracted, and the height was lower than the design, and it was sometimes impossible to construct a structure as designed. Also,
When a worker rides on the reinforcing bar assembled during the work, the stirrup bar d may be easily displaced, and the height of the main bar c may be easily changed more than it is loosened. In addition, since the two split stirrup reinforcements d are arranged after the main reinforcement c is arranged first, it is difficult to arrange the lower half under the main reinforcement c and the workability is not so good.

Further, the biggest problem with the two-divided stirrup bar d is that it is structurally unreliable as a shear reinforcing bar. In other words, the two split stirrup streaks d and d adopted a method called an overlap joint in which the overlapped part is solidified with mortar sprayed around and the function as a single reinforcing bar is exhibited. However, sprayed mortar and concrete have low adhesive strength and do not have sufficient strength to solidify the overlapped portions. Therefore, the overlap joint part could not be calculated as a single shear reinforcing bar, and such a double split stirrup bar could not be evaluated and calculated as a structural material in terms of design.

The present invention has been made in order to solve the above problems. It is remarkably easy to construct, does not use an extra material, and structurally solves all the conventional problems. The purpose is to provide a slope stabilization method.

[0007]

The slope stabilizing method according to the present invention uses a spiral reinforcing bar as a stirrup bar. The spiral stirrup bar used in this method is a single reinforcing bar bent in a spiral shape, and the spiral is bent so as to draw a square spiral. This spiral stirrup bar is first placed on the ground, and this is also used as an assembled rebar, and at least four main bars are arranged inside the spiral of this spiral stirrup bar. The main muscles are tied together and fixed to the spiral stirrup muscles. On the left and right sides of this stirrup, wire mesh form plates are erected in parallel. A crimp wire mesh or expanded metal can be used as the wire mesh form plate. The left and right formwork plates are connected and fixed by a connecting steel material. Placing a hardening material such as mortar or concrete between the form plates,
Build a structure. Although only one spiral stirrup bar may be used, a plurality of spiral stirrup bars may be arranged so that the spirals overlap.

[0008]

[Operation] First, the main muscle is bound and arranged on a single stirrup muscle bent in a square spiral shape. As a result, the main bars can be arranged accurately without sagging and extremely easily. The stirrup muscle is bent in a rectangular shape and does not contract vertically or horizontally or bend. Therefore, the main bars bound to this can always be arranged accurately and a structure as designed can be constructed. Since the spiral stirrup muscle has one bent in a rectangular shape and is arranged before the main muscle, it has no overlapping portion and can be extremely effectively used as a shear reinforcing muscle.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on an embodiment shown in the drawings. In the figure, reference numeral 1 denotes a spiral stirrup streak, which is bent in a rectangular spiral shape. First, the spiral stirrup muscle 1 is installed in the ground, and four main muscles 2 are arranged inside the stirrup muscle 1 that draws the spiral. The spiral stirrup streak 1 is placed on the spacer block 7 placed on the ground and installed. The respective main bars 2 are arranged so as to be located at the four corners of the rectangular spiral shape. This main line 2
Is bound and fixed to the spiral stirrup muscle 1.

On the left and right sides of the spiral stirrup streak 1, wire mesh form frame plates 3, 3 are erected in parallel. A crimp wire mesh is used as the wire mesh form plate 3. The left and right wire mesh formwork plates 3, 3 are connected and fixed by a rod-shaped connecting steel member 4, 4. As the connecting steel member 4, a bent end having a hook shape may be used and hooked in a mesh, and the end may be bent and fixed.

The formwork as described above is assembled in a lattice shape extending vertically and horizontally on the ground surface of the slope, and the ground anchor 5 is preliminarily set at the intersection. Mortar 6 is cast into this formwork to construct a structure. Prestressing force is applied to the anchor 5 to hold the structure against the ground and prevent the slope from rising.

[0012]

Since the present invention has the above-mentioned structure, the following effects can be obtained. Since the main bar is attached to one spiral stirrup muscle that has been bent in a square spiral shape in advance, it is not necessary to support the main bar at a certain height in order to prevent slack, and the work of arranging the reinforcing bar becomes remarkable. Further, since the spiral stirrup muscle is bent in a square spiral shape, if the main muscle is bound at a predetermined position, it can be accurately maintained at an appropriate position and width, and the work of arranging is accurate and easy. Since one rigid spiral stirrup muscle bent in a square spiral shape is used, the main bar always maintains an accurate width and height, no slack etc. occurs, and an accurate structure as designed can be constructed . Also, even if a worker rides on the assembled reinforcing bar, the height of the main bar does not change as the length of the overlap does not change like the conventional stirrup bar and the part does not go down. Nothing. Since it is a single continuous stirrup bar, this stirrup bar tightly surrounds the main bar, which is highly reliable as a shear reinforcing bar and can be sufficiently evaluated and calculated as a shear reinforcing bar by design. Since the stirrup bar is placed in advance and placed on the main stirrup after this, there is no need for any difficult work such as turning the stirrup streak under the main stirrup arranged near the natural ground as in conventional construction.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view showing a state in which stirrup streaks are installed on the ground.

FIG. 3 is a cross-sectional view showing a state where main bars are arranged.

FIG. 4 is a cross-sectional view of a state where the wire mesh form plate is fixed.

FIG. 5 is a perspective view of a structure constructed by the construction method according to the present invention.

FIG. 6 is a cross-sectional view of a conventional mold assembly.

[Explanation of symbols]

 1 Spiral stirrup bar 2 Main bar 3 Wire mesh form plate 4 Connection steel 5 Ground anchor 6 Mortar 7 Spacer block

Claims (1)

(57) [Claims] 1. A spiral stirrup bar bent so as to draw a rectangular spiral is placed on the ground, and at least four main bars are arranged in parallel inside the spiral stirrup bar that draws this spiral, and the main bar is spiral. Bundling to the stirrup muscle, standing on the ground on both sides of this spiral stirrup muscle, installing wire mesh formwork plates in parallel, connecting both left and right formwork plates with connecting steel material, formboard A slope stabilization method in which a hardening material is placed in between to build a structure.