JPH06336732A - Slope-stabilizing construction method - Google Patents

Abstract

PURPOSE:To improve working efficiency and structural reliability, by making easy the setting-up of steel bars and by accurately arranging main reinforcements inside a stirrup. CONSTITUTION:A spiral stirrup 1 bent spirally is placed on the natural ground of a slope. At least four main reinforcements 2 are arranged inside the stirrup 1 formed spirally and are fastened thereto. Mesh-shaped form plates 3, 3 ar allowed to stand parallel to each other on both sides, left and right, of the stirrup 1. The form plates 3, 3, left and right, are stationarily connected with connecting steel members 4. A hardener such as mortar 6 is placed between the form plates 3, 3. Therefore, since the stirrup 1 is precedently placed and the main reinforcements 2 are arranged at the inside thereof, these form plates can be set up accurately and easily. Since the stirrup 1 is formed of one continuous rod, deformation such as dislocation does not occur and reliability as a reinforcing bar against shear is improved.

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, two pieces of a metal mesh-like form plate a such as a crimp wire mesh are united by connecting them in parallel with a connecting steel material b and placed on a ground, and a plurality of main bars c are arranged above and below the connecting steel material b. After that, the circumference of the main muscle was surrounded by the stirrup muscle d divided into two so as to surround the main muscle c.

[0003]

In the construction method as described above, the mold assembling is simplified by using the unitized mold and the two divided stirrup streaks d are used. It was devised to easily apply stirrup muscles to the main muscles arranged near the mountain surface. However, in such a construction method, since the frame plates a and a are already connected by the connecting steel materials b and b, the main bar c is arranged above or below the connecting steel materials b and b. With such a method of bar arrangement, the main bar c is restricted by the height of the connecting steel members b, b, so that there is a portion that cannot be placed close to the inside of the stirrup bar d.

Conventionally, when arranging the main bar c, in order to float the main bar c from the natural ground to support it and arrange it at an appropriate height,
Had to use assembled rebar. Therefore, extra material was needed accordingly. Further, as shown in FIG. 6, when the stirrup reinforcement d is divided into two parts, the stirrup reinforcement d is easily displaced and the height of the main reinforcement c is also increased when riding on the rebars assembled by the worker during work. Often changed easily. In addition, it is still difficult to arrange the two-piece stirrup streak d under the main streak c in actual construction, 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 preferably 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 bars are fixed to the spiral stirrup by binding or welding. 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. A hardener such as mortar or concrete is placed between the form plates to construct a structure. Only one spiral stirrup bar may be used, or a plurality of spiral stirrup bars may be stacked and used in a spiral shape.

[0008]

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. This spiral stirrup muscle 1 is installed in the ground, and four main muscles 2 are arranged inside the stirrup muscle 1 that draws this 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 muscle 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.

[0011]

Since the present invention has the above-mentioned structure, the following effects can be obtained. Since the main bar is attached to the spiral stirrup bar that has been bent in a spiral shape in advance, it is possible to easily arrange the main bar without using an assembled rebar to save the labor for assembling the rebar and reduce the material cost. 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 arranged and the main stirrup is fixed to this, it is easy to always arrange the stirrup bar as close to the inner side of the stirrup bar, and ideal rebar assembly is possible. Since the stirrup bar is placed in advance and the stirrup bar is placed after this, there is no need for any difficult work such as turning the stirrup bar under the main bar located near the natural ground as in conventional construction. Since the stirrup bar is a single continuous stirrup bar, even if an operator rides on the assembled rebar bar, the stirrup bar will not be displaced and the height of the main bar will not change.

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

Claims (2)

[Claims] 1. A spiral stirrup muscle that is bent in a spiral shape is placed on a natural ground, and at least four main stirrup muscles are arranged in parallel inside the spiral stirrup muscle that draws this spiral. On both sides, stand up in the ground and install wire mesh formwork plates in parallel, connect both left and right formwork plates with connecting steel material, and set a hardening material between the formwork plates to construct a structure Slope stabilization method. 2. The slope stabilizing method according to claim 1, wherein the main bar is arranged inside the spiral stirrup bar that draws a square spiral and is bound.