JPS5858493B2 - Slope protection method - Google Patents

Description

Detailed Description of the Invention This invention uses an expanded metal frame with high bending rigidity to suppress slope collapse, and also uses this expanded metal frame to form a concrete slope. This relates to a slope protection method that aims to stabilize the slope.

Conventionally, there have been various types of slope stabilization frames, but all of these have disadvantages.

For example, a type that uses a flexible but non-rigid frame has very good adaptability to the ground, but the slope is finished step by step, the frame and reinforcing bars are assembled, and concrete is sprayed, which hardens. Sufficient rigidity cannot be obtained until later, and fixation using rock anchors or the like cannot be achieved.

As a result, there is a lot of work left on hand, which greatly reduces construction efficiency.

If you try to use H-shaped steel or channel steel to suppress the slope, it is not suitable for working on the slope due to its large weight, and it also has poor adaptability to the ground, making it difficult to use concrete. Adhesion is also not good.

Furthermore, when a beam is made by spraying concrete using a steel frame like this, the concrete becomes porous and cannot achieve the required strength because there is no place for air to escape.

The slope protection method of this invention was invented in view of the above-mentioned circumstances, and will be explained below based on the illustrated embodiments.

FIGS. 1 and 2 show an expanded metal frame (hereinafter referred to as frame 1) used in the present invention, which is formed by processing a large expanded metal with high bending rigidity into a groove-shaped cross section.

The rigidity of this frame 1 is set to be sufficient to suppress the slope.

The cross-sectional shape may be a groove-shaped one that is open upward as shown in FIG. 1A, or a groove-shaped one that is closed upward as shown in FIG.

Since these frames 1 are bent into a groove shape, any number of frames 1 can be successively stacked on top of each other (see FIGS. 4a and 4b).

Furthermore, in addition to the linear intermediate frame 1a as shown in Fig. 2a, the intersecting frame 1b having an intersecting shape as shown in Fig. 2a is used at the point portion of the lattice-like slope frame, which improves construction efficiency. can be raised.

As shown in FIG. 3, the construction procedure is to cut the upper part of the tsuzu washing tub, and after shaping the slope, arrange the above-mentioned frames 1 in a lattice pattern with the bottom surface touching the washing tub.

At this time, the frame 1 is fixed to a rock having a supporting capacity using a hard 2u rock anchor 2.

Therefore, due to the tension of the rock anchor 2, the slope surface layer is tightened between the rock mass and the frame 1 and collapses 75 (see Fig. 3a).

When the frames 1 are arranged in a lattice shape as shown in FIGS. 4 and 5, the straight intermediate frames 1a are intersected between the case points of the lattice, and the case points intersect at the center of the case points. The intersection frame 1b formed in the following manner is used.

After cutting and shaping the slope, the intermediate frame 1a is turned down, and the intersection frame 1/- frame 1b is installed on top of it so that the respective frames are overlapped at their connecting ends. The frame 1b is fixed to the rock with rock anchors 2.

Next, all steps of the slope are cut and shaped, and the frame 1 is fixed in the same way (see Figure 4).

Thereafter, by spraying or placing mortar or concrete 3 on all steps of the slope while suppressing the collapse of the slope as described above, the intersection frame 1 is
The intermediate frame 1a around b is also fixed to the slope at the same time, and the entire slope can be held down evenly.

Further, the joint portions of the frames 1a and 1b formed at this time become an integrated beam structure by taking a predetermined joint length.

The inside of the legal framework, which is formed in a grid pattern, is usually covered with vegetation or filled with chestnut stone or other materials.

The present invention has the above configuration and has the following advantages and features.

(1) The expanded metal frame has high strength and rigidity against shearing and bending, so it can be directly fixed to the slope with rock anchors to prevent collapse without concrete pouring or spraying. .

(2) By fixing the expanded metal frame to the slope using rock anchors and then spraying mortar or concrete to form beams, the strength of the legal framework can be further increased and the stability of the slope can be increased.

(3) Since the expanded metal frame and rock anchor can be constructed in succession first and then spraying can be started, construction efficiency is high and safety during construction is high.

(4) Extended metal frames can also be used as a substitute for reinforcing bars, so high strength can be obtained without reinforcement.

By further arranging reinforcement, the strength can be further increased.

(5) Since the expanded metal frame is firmly fixed to the rock anchor in advance, there is no need to fix the legal frame again.

(6) Since the expanded metal frame has a groove shape, it can be stacked arbitrarily.

(7) Expanded metal frames have good adhesion with concrete, so they become completely integrated, and since spraying allows air that sometimes occurs to escape to the outside of the frame, uniform concrete with a specified strength can be obtained, making it ideal for reinforced concrete beams. Demonstrates its strength to the fullest.

(8) By fixing the intersection frame with a lock anchor, the peripheral intermediate frame can also be automatically fixed.

[Brief explanation of the drawing]

Figures 1a and 1b show an embodiment of the invention of the bag.
/i Cross-sectional view of expanded memel frame, Figure 2a,
b is a perspective view, Fig. 3 atbtc is a sectional view showing the construction procedure, Fig. 4 a is a perspective view showing the connection of the expanded metal frame, the same is the A-Al1 side view, and the same C is the same l-
B sectional view and FIG. 5 are longitudinal sectional views of the connecting portion. 1, Ia, 1b...exband metal frame, 2...rock anchor, 3...
・Mortar size concrete, 4... mountain surface, 5... bedrock line.

Claims (1)

[Claims] 1 When arranging expanded metal frames with high bending rigidity processed into a groove-shaped cross section in a lattice pattern on a slope, an intermediate frame formed in a straight line is used between the case points, and an intermediate frame formed in a straight line is used between the case points. arranging intersecting frames formed so as to intersect at point centers, overlapping their connection ends with the intermediate frame below and the intersecting frame upward;
A slope protection method characterized by fixing the intersection frame with anchors to hold down the slope, and then spraying or pouring mortar residue or concrete to form a slope frame.