JPH057492B2 - - 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 frame construction method.

Typical of these is that the formwork on both sides is shaped like a wire mesh, these are connected by horizontal sub-reinforcements, and the horizontal sub-reinforcements are further connected to form a lattice frame, and mortar or One is to form a legal frame by spraying concrete, the other is to form a formwork from water-resistant cardboard or plastic, and one is to form a legal frame by spraying mortar or concrete into the formwork. It is representative.

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 that occurs when mortar or concrete is sprayed to scatter, The frame becomes sandpocket-like, resulting in a weak legal frame, 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 difficult.Moreover, it is difficult to align the reinforcing bars when trying to align the formwork 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 problem) That is, the present invention stretches a wire mesh on the slope, arranges one or several reinforcing bars in a lattice pattern on top of the wire mesh, and creates a ceiling surface with large gaps. A cover formwork, which is a formwork formed by integrally molding both side leg surfaces made of mesh plates with fine mesh with the same wire material and whose end face shape is approximately inverted U-shape, is used to cover the reinforcing bars. This slope stabilizing slope frame construction method is characterized in that a lattice frame is formed by disposing the lattice frame, and a slope frame is formed by spraying mortar or concrete from above the lattice frame.

(Example) A wire mesh 1 with a mesh size of around 5 cm is stretched over the entire surface of the slope 30, and a wire mesh 1 with a length of 9 mm in diameter is installed at one place every 1 to 3 ^m2.
A trench of about 30 cm is excavated, a wire mesh is wrapped in the trench, and an anchor pin with a diameter of 16 mm and a depth of 40 cm is driven in and fixed.

Next, place four reinforcing bars 2 with diameters of around 10 mm on top of the wire mesh, placing them at the four corners of the hoop bars 3, and arrange them in a grid pattern.The overlapping parts are tied with wire, etc., and fixed with anchor pins 4, etc. To go.

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. There are cases where only the book is reinforced.

To cover the reinforcing bars arranged in a lattice pattern, the ceiling surface 4 has a gap large enough to allow mortar or concrete to be injected without any problem, and a fine mesh (usually 1 cm ² to 3 cm ² , but sometimes (It may be 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 6 having the same wire are integrally formed with the same wire material, and whose end face shape is approximately an inverted U-shape.

The lower ends of the leg surfaces on both sides made of mesh plates of this cover formwork are attached to the second
As shown in the figure, there is also a case where the lower end is formed into a comb-like shape 7 with about 5 cm protruding.

In addition, for the Kabuse formwork, the vertical part of the slope is long and is first installed only in the vertical direction, and the horizontal part is
Generally, a method of forming a lattice frame by butting a short overlay form against a vertical overlay form is extremely easy to construct, but it is not limited to this method.

Incidentally, the cross-sectional shape of the cover 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 8 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 practice 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 provides the following advantages:
On top of that, one or several reinforcing bars are arranged in a lattice pattern, and the ceiling surface with large gaps and the leg surfaces on both sides made of mesh plates with fine mesh are integrally molded with the same wire material. A lattice frame is formed by arranging a cover formwork whose end face shape is approximately an inverted U-shape to cover the reinforcing bars, and mortar or concrete is sprayed from above the lattice frame. Since it is a slope stabilizing slope construction method that is characterized by forming slope frames by using the slopes, it is possible to provide slope frames that are strong, meet standards, and have 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]

FIGS. 1 and 2 are perspective views showing the cover formwork. FIG. 3 is a sectional view showing the construction method of the present invention. Figure 4 is a plan view showing the lattice frame installed. In the diagram, 1 is wire mesh, 2 is reinforcing bar, 3 is hoop bar, 4
is an anchor pin, 5 is a ceiling part surface with a large gap, 6 is a both side leg part surface with a fine mesh, 7
is the lower end of the comb-like shape, 8 is the part surrounded by the frame, 20
3 is the Kabuse formwork and 30 is the slope.

Claims (1)

[Scope of Claims] 1 A wire mesh is stretched on the slope, and one or several reinforcing bars are arranged in a lattice pattern on top of the wire mesh, and the ceiling surface has large gaps and the mesh board has fine mesh. A lattice frame is formed by disposing an overlapping formwork, which is a formwork formed by integrally molding both side leg surfaces of the same wire material and whose end face shape is approximately an inverted U-shape, so as to cover the reinforcing bars. A slope stabilizing slope frame construction method characterized in that a slope frame is formed by spraying mortar or concrete from above the lattice frame. 2. The slope stabilization method as set forth in claim 1, wherein the lower ends of both side leg surfaces of the mesh plate of the cover formwork having a substantially inverted U-shaped end face shape are comb-teeth shaped. 3. When arranging overlay formwork to form a lattice frame, 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 slope stabilizing slope frame construction method according to claim 1, which uses a butting method.