JPS5998933A - Prevention of landslide - Google Patents

Abstract

PURPOSE:To prevent the occurrence of landslide by forming landslide preventive piles in the ground in the right-angled direction of the slope. CONSTITUTION:Steel tubular piles are driven in the right-angled direction to a slope into strong ground 2b of the grounds 2a-2b covering the slide line 4 of the ground 2 with the slope 1. Holes are drilled by an auger and concrete is placed into the holes and hardened. The landslide of the ground 2a can be prevented by the shear rigidity of the drivn landslide preventive piles.

Description

[Detailed description of the invention] The present invention relates to a landslide prevention method.

As seen in flood disasters, the soil on a slope, which has become heavier and heavier due to heavy rains, cannot withstand its own weight and becomes a landslide, swallowing houses below the slope. The dog washes away, causing a lot of damage to human life and property. It is also a well-known fact that similar landslides occur due to earthquake pressure. The present invention is intended to prevent this type of disaster.

Figure 1 is a cross-sectional view of a slope, where 1 shows the slope, 2 shows the ground that makes up the slope, and 3 shows houses and other structures below the slope.

When a large amount of rain falls concentratedly in a short period of time in a place with such topography, a ground 2a that contains a large amount of rainwater and whose strength has decreased is formed, and the ground 2b that does not contain water and whose strength has not decreased is formed. A slip line 4 occurs between them, and the ground 2a turns into a landslide and flows out in the direction of the arrow 5, washing away houses 3 downstream or burying these houses 3 in the sand, resulting in damage to human life and property. cause damage. Therefore, it is an object of the present invention to provide a landslide prevention method that prevents these landslides.

A feature of the present invention is that steel pipe piles are installed in the slope soil in a direction approximately perpendicular to the slope. Conc'J consists of piles, noil cement pillars, etc., and is designed to proactively prevent landslides by forming slope K landslide prevention piles that take a break when a landslide occurs.

Embodiments of the present invention will be described in detail below with reference to the drawings.

L-shankoku FIG. 2 is a perspective view showing an embodiment of the present invention.

In FIG. 2, 6 is in a suitable manner as described below.

These are landslide prevention piles such as steel pipe piles, concrete piles, and noil cement columns, which are formed between the ground 2a and 2b with the slip line 4 in a direction substantially perpendicular to the slope soil.

The ground 2a, which has absorbed a large amount of rainwater due to the torrential rain and has increased in weight and decreased in strength, tends to flow out in the direction of the arrow 5 as a landslide along a certain slip line 4. On the other hand, the landslide prevention pile 6, which has sufficient shear rigidity and is penetrated into the strong ground 2b, exhibits the effect of preventing landslides in the ground 2a due to its shear rigidity.

Note that the landslide prevention pile 6 is formed in a direction substantially perpendicular to the slope by the following method.

Steel pipe piles and concrete piles are driven with a pile driver.

With cast-in-place piles, a hole is made with an auger and concrete is poured into the hole. If the fill cement column is torn, cement mortar is injected while rotating and pulling out the rotor blade that has penetrated to the required depth.

Furthermore, the landslide prevention pillars or piles 6 may be arranged within the slope 1 by any method such as a staggered arrangement in a square grid as shown in FIG. 3, 1.2VC.

Furthermore, the landslide prevention piles 6 may be formed continuously up to the ground surface as shown by the broken line in FIG. 2. In short, according to the present invention, steel pipe piles, concrete piles, By forming fill-cement pillars, etc., landslides are prevented due to the bending properties of the bow pipes and pillars.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a normal mountain slope, Fig. 2 is a sectional view showing an embodiment of the present invention, and Figs. 1...Slope, 2...Ground, 2a...
...Ground whose strength has decreased, 2b...Ground whose strength has not decreased. 3...house, 4...slip line, 6...
...Landslide prevention piles.

Claims (1)

[Claims] Steel pipe piles, concrete piles,
A landslide prevention method characterized by forming soil-cement pillars.