JPH0441724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for constructing a slope frame for protecting a slope.

(Conventional technology) Various methods have been proposed for the method of construction.

One of the most typical of these is that the formwork on both sides is shaped like a wire mesh, which are connected by horizontal sub-reinforcements, and the horizontal sub-bars and reinforcing bars are further connected to form a lattice frame, and mortar is placed inside this formwork. Or, one method is to form a legal frame by spraying concrete, and the other is to form a formwork from water-resistant cardboard or plastic, and then form a legal frame by spraying mortar or concrete into the formwork. This is a typical example.

Each of these typical sill construction methods has its advantages and disadvantages.

In terms of the standards and aesthetics of the finished legal framework, a legal framework made of water-resistant cardboard or plastic formwork is superior, but these do not allow the rebound generated when mortar or concrete is sprayed to scatter, The frame becomes a sandpocket-like frame with no strength, and the reinforcing bars located inside corrode, which poses problems in terms of structural mechanics as a stable foundation.

On the other hand, if a formwork in which wire mesh is connected with horizontal sub-reinforcements is used, the aesthetic appearance of the finished frame will be degraded, but since the frames on both sides have gaps or air bleeds, rebound will scatter through the mesh of the wire mesh. It is possible to form a strong slope frame on the slope surface, and there are no problems in terms of structural mechanics.

(Problems to be Solved by the Invention) The present invention aims to improve the method of constructing a method using a formwork with wire mesh on both sides, which poses no problem in terms of structural mechanics. This is an attempt to improve the problems that conventional wire mesh forms had.

In conventional wire mesh formwork, the formwork on both sides is connected by horizontal sub-rebars, and the reinforcing bars are further connected to the horizontal sub-bars. Construction work such as assembling the formwork and reinforcing bars and connecting them to each other is extremely complicated.Moreover, when trying to align the formwork along the slope, it is difficult to align the reinforcing bars, and it is difficult to align the reinforcing bars along the slope. If you try,
There was a problem with the formwork lifting up and not following the slope.

As described above, the conventional slope construction method using wire mesh formwork has two major drawbacks: workability and difficulty following the unevenness of the slope.

The present inventors, who are engaged in slope protection construction and conducting research, have conducted intensive research to solve the above-mentioned drawbacks of wire mesh formwork. In the case of formwork formed by spraying low-slump mortar or concrete, the wire mesh formwork itself is not subject to the load of mortar, etc., and the present invention was achieved based on the idea that horizontal sub-reinforcement elements are not required. .

(Means for Solving the Problems) That is, the present invention arranges one or several reinforcing bars in a lattice pattern on a slope, and creates a ceiling surface with large openings and both side legs with fine openings. A lattice frame is formed by disposing an overlap formwork whose end face shape is approximately inverted U-shape and which is formed integrally with the same wire rod so as to cover the reinforcing bars, and This method of constructing a legal frame is characterized by forming the legal frame by spraying low-slump mortar or concrete from above the lattice frame.

(Example) On the slope 30, four reinforcing bars 1 with a diameter of around 10 mm are placed at the four corners of the hoop bars 2, arranged in a grid pattern, the overlapping parts are tied with wire, etc., and anchor pins, etc. Fix it with.

Normally, four reinforcing bars are used, but if a considerable degree of strength is required, sometimes six reinforcing bars are arranged in three stages of two bars each, or two or one reinforcing bars are used when strength is not so required. Sometimes only the book is reinforced.

The ceiling surface 4 has a large opening so that mortar or concrete can be poured into it without any problem so as to cover the reinforcing bars arranged in a lattice pattern, and a fine opening (usually 1 cm ² to 3 cm ² ) (Sometimes it is a horizontally long or vertically long rectangle, and the shape is such that the cross-sectional shape of the frame to be formed can be maintained neatly.)
An overlapping formwork 20 is installed, which is a formwork in which both side leg surfaces 5 having a shape are integrally molded from the same wire material, and whose end face shape is approximately an inverted U-shape.

In addition, for the Kabuse formwork, the vertical part of the legal frame is made into a long formwork, and only the vertical direction is installed first, and the horizontal part is created by using short Kabuse formwork on the vertical Kabuse formwork. The method of butting together to form a lattice frame is generally used because it has extremely good workability, but it is not limited to this method.

Note that the cross-sectional shape of the overlay formwork when installed is usually trapezoidal, but it may also be square or rectangular.

Once the above work is completed, low slump mortar or concrete is sprayed over the Kabuse formwork to complete the legal form.

The cross-sectional shape of the slope frame to be formed depends on the situation of the slope, but the bottom width is 20 cm, the top width is 15 cm, and the height is 15 cm.
The width is 60 cm at the bottom, the width at the top is 30 cm, and the height is 30 cm.
They can be made in a wide variety of sizes up to 1.2 cm, and the size of the frame is often 1 to 2 meters square.

In this case, in order to prevent the rebound that scatters during the spraying of mortar or concrete from having an adverse effect on the greening method that will be carried out later within the framework, the greening area 6 surrounded by the framework should be covered with vinyl sheets, pieces of paper cloth, etc. In some cases, a rectangular covering may be stretched first.

Once the legal framework has been formed, in order to green the area within the legal framework, it is common to spray plant seeds and vegetation materials to a thickness of approximately 5 cm using a power sprayer to form a vegetation base layer and to lay down vegetation sandbags. It is true.

(Effects of the Invention) As described above, the present invention arranges one or several reinforcing bars in a lattice pattern on a slope, and creates a ceiling surface with a large opening and a leg surface on both sides with a fine opening. A lattice frame is formed by arranging a cover frame formed by integrally molding the same wire material and having a substantially inverted U-shaped end face shape to cover the reinforcing bars, This method of constructing a legal frame is characterized by forming the legal frame by spraying low-slump mortar or concrete from above, so it is possible to provide a legal frame that is strong, meets standards, and has an aesthetic appearance.

Furthermore, by using Kabuse formwork, construction is extremely easy compared to conventional formwork construction methods, and furthermore, by using Kabuse formwork that is long in the vertical direction of the slope, short Kabuse formwork is used in the horizontal direction. If you take the matching method,
It has the advantage of being easier to construct and shortening the construction period.

Furthermore, unlike conventional methods, the reinforcing bars and formwork are not integrated, so both reinforcing bars and formwork can be placed along the unevenness of the slope, providing a slope that is integrated with the slope. can.

Furthermore, since the formwork is integrally molded from the same wire material, it has the advantage of low manufacturing costs, and when installing it on a slope,
It has many remarkable effects, such as making it relatively easy to bend or cut both side leg surfaces of the formwork in order to follow the unevenness of the slope.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the cover formwork. FIG. 2 is a sectional view showing the construction method of the present invention. Figure 3 is a plan view showing the lattice frame installed. In the figure, 1 is a reinforcing bar, 2 is a hoop reinforcement, 3 is an anchor pin, 4 is a ceiling surface with a large opening, 5 is a side leg surface with a fine opening, 6 is a part surrounded by a legal frame, and 20 is a The cover formwork, 30, is a slope.

Claims (1)

[Claims] 1. One or several reinforcing bars are arranged in a lattice pattern on the slope, and the ceiling surface with large openings and the leg surfaces on both sides with fine openings are integrated with the same wire rod. A lattice frame is formed by disposing a cover formwork whose end face is approximately inverted U-shaped to cover the reinforcing bars, and a low slump formwork is formed from above the lattice frame. A method for constructing a legal framework, characterized by forming the legal framework by spraying mortar or concrete. 2. When forming a lattice frame by arranging overlay formwork, a long overlay formwork is used in the vertical direction of the slope, and a short horizontal overlay formwork is used as a vertical overlay formwork. A method for constructing a legal frame according to claim 1, which uses a butting method.