JPH0678636B2 - Construction method of slope protection structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a slope protection structure for preventing collapse of a slope, and more particularly to a method for constructing a slope protection structure which is easy to construct.

[0002]

2. Description of the Related Art The applicant of the present application filed Japanese Patent Application No. 61-142322.
The invention disclosed in Japanese Patent Laid-Open No. 63-533 is disclosed. According to the invention, the formwork is installed on the slope in a grid pattern,
Further, a formwork is installed at the grid-like intersection so as to surround it. Hardening material such as concrete is cast on the formwork to construct a grid-like method frame and crossing haunches. The haunch part protects the intersection where stress is concentrated to form a slope protection structure with high strength.

[0003]

A problem with such an invention is that it takes time and effort to construct the haunch portion. It is cumbersome and labor-intensive to tie the formwork for the four haunch parts to the formwork for constructing the legal form part on site. Further, when the frame forming the haunch portion is formed of a wire mesh-like member, the strength may be low and the haunch portion may bulge greatly, and a structure as designed may not be obtained.

The present invention has been made to solve the above problems, and an object thereof is to provide a method for constructing a slope protection structure which is easy to construct and enables construction of a structure as designed. To do.

[0005]

SUMMARY OF THE INVENTION The present invention uses a haunch form having a ring-shaped streak and a porous dam plate stretched thereon to facilitate construction. The ring-shaped streaks are arranged vertically in parallel, and a porous weir plate is stretched between the ring-shaped streaks at appropriate intervals to form a haunch form. The haunch formwork may be assembled in a ring shape in advance at the factory, but it may be assembled on site with a porous dam plate stretched between two reinforcing bars to form a ring shape. Each gap of the porous dam plate is formed on all four sides of the haunch form, and the normal form frame is inserted into the gaps in parallel with each other. The legal formwork inserted from all sides is butted in the haunch formwork. A cement-based hardening material is placed in the haunch form and the method form to construct the haunch part and the method frame part.

[0006] First, the legal form frames are arranged in the vertical and horizontal directions on the ground and assembled on the slope in a grid pattern. After that, ring-shaped streaks are arranged in the vertical direction so as to surround the intersecting portion in the legal form. The ring-shaped streaks are arranged horizontally with respect to the ground by passing through the holes of the porous dam plate of the standard formwork. It is also possible to construct a haunch formwork by stretching a porous dam plate between the upper and lower ring-shaped streaks so as to cover the corners of the normal formwork. Expanded metal or crimp wire mesh can be used as the porous dam plate as described above.

[0007]

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, 1 is a haunch form,
It is composed of ring-shaped streaks 2 and 2 arranged vertically and a porous dam plate stretched between them. In the embodiment, a crimp wire net 3 is used as the porous dam plate. The haunch formwork 1 may be preliminarily configured into a ring shape at the factory, or a crimp wire net 3 may be stretched by welding or the like between two rebars and bent into a ring shape on site. You can also do it. The crimp wire nets 3 are stretched at appropriate intervals, and gaps 4 between the crimp wire nets 3 are opened in four directions of the haunch formwork 1.

From each gap of the haunch formwork 1, a legal formwork 6 in which the crimp wire nets 5, 5 are erected upright is inserted in parallel to the left and right. Before inserting the legal form 6, a lower end reinforcing bar 7 to be reinforced between the legal forms 6 is arranged in advance along the ground. The legal formwork 6 is made to abut in the haunch formwork 1, so that the legal formwork 6 extends in all directions of the haunch formwork. After that, the space between the left and right crimp wire nets 5, 5 of the legal form 6 is held by a spacer, and the upper end reinforcing bar 8 is arranged along the legal form 6. Concrete 9 which is a cement-based hardening material is placed in the haunch formwork 1 and the method formwork 6,
The method frame portion 10 as shown in FIG. 4 extends in a grid pattern in the ground,
A slope protection structure in which a haunch portion 11 is formed at the intersection is constructed.

FIG. 5 and FIG. 6 show another construction method. First, the method form 6 is assembled in a vertical and horizontal grid pattern on the ground.
The ring-shaped streaks 2 are arranged vertically so as to surround the intersection of the vertical and horizontal formwork. The ring-shaped streaks 2 are to be maintained horizontally through the holes of the dam plate of the legal form 6, that is, the mesh of the crimp wire net 5 in the embodiment, and the ring-shaped streaks 2 and 2 are supported by the crimp wire net 5. Will be. A crimp wire mesh 3 is stretched between the upper and lower ring-shaped streaks 2 and 2 so as to cover the corners of the normal formwork 6 and 6. The height of the crimp wire mesh 3 is set to be slightly higher than the interval between the ring-shaped streaks 2 and 2, and the crimped wire net 3 is stretched from the inside of the ring-shaped streaks 2 and fixed by welding or the like.

FIG. 7 and FIG. 8 show another embodiment,
The ring-shaped muscle 2 of the haunch form 1 is bent into an octagon so that the haunch portion 11 becomes a triangle. In addition, the ring-shaped streak 3 may be another polygon such as a quadrangle.

According to the above configuration, the haunch form 1
Since a porous dam plate is stretched over the ring-shaped streaks 2.2, the construction at the site is remarkably easy and the shape of the haunch formwork 1 is not changed by the ring-shaped streaks 2.2 due to the weight of the hardening material. . Further, the porous dam plate of the legal form 6 is deeply inserted into the central portion of the haunch form 1. This means that the cover of the hardening material on the dam plate at that portion becomes large, and the dam plate of the legal formwork 6 sufficiently functions as a structural material in the haunch portion 11. Therefore, the strength of the intersecting portion where the stress is concentrated remarkably increases together with the haunch portion 11 and the dam plate therein.

[0012]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned construction, the haunch formwork is assembled by using the upper and lower ring-shaped streaks, and the work on site can be remarkably reduced and the construction can be simplified. Further, since the shape of the haunch form is maintained by the ring-shaped streaks, the haunch form is not deformed by the weight of the hardening material, and the construction can be performed as designed. Since the weir plate of the legal form enters the haunch portion and functions as a structural material, the strength of the portion where stress is concentrated becomes extremely large.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a construction state of a slope protection structure according to the present invention.

FIG. 2 is a perspective view showing a state in which a mold is assembled.

FIG. 3 is a plan view thereof.

FIG. 4 is an overall view of a slope protection structure.

FIG. 5 is a plan view of another construction example.

FIG. 6 is a sectional view taken along the line AA.

FIG. 7 is a perspective view of a haunch formwork.

FIG. 8 is a plan view thereof.

[Explanation of symbols] 1 haunch form 2 ring-shaped streak 3 crimp wire net 4 gap 5 crimp wire net 6 method formwork 7 bottom rebar 8 upper end rebar 9 concrete 10 method frame part 11 haunch part 4

Claims (4)

[Claims] 1. A porous weir plate having a porous weir plate stretched at appropriate intervals between upper and lower ring-shaped streaks is installed on the ground, and the porous weir plate is opened on all four sides of the haunch form frame. From each gap between them, insert a legal form in which the porous weir plates are erected in parallel to the left and right, but abut in the haunch form, and place a cement-based hardening material in the haunch form and the form. Construction method of slope protection structure that constructs haunch part and slope frame part. 2. A legal formwork in which porous dam plates are erected in parallel to the left and right are arranged vertically and horizontally on a slope, and ring-shaped streaks are formed so as to surround the intersection of the legal formwork. The haunch formwork is constructed by arranging bars vertically through the holes of the weir plate and stretching a porous weir plate so as to cover the corners of the legal formwork. A construction method for slope protection structures in which a cement-based hardening material is placed inside to construct a haunch part and a slope frame part. 3. The method for constructing a slope protection structure according to claim 1, wherein expanded metal is used as the porous dam plate. 4. The method for constructing a slope protection structure according to claim 1, wherein a crimp wire net is adopted as the porous dam plate.