A Repairing Method for the Clay Landslide in Shaoguan of Guangdong Province
A slope in Shaoguan of Guangdong province is composed of soils with high water adsorption. Rainstorms usually decrease strength parameters of soils and lead to great landslide with severe soil disturbance. A popular unloading and anti-sliding supporting m
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A REPAIRING METHOD FOR THE CLAY LANDSLIDE IN SHAOGUAN OF GUANGDONG PROVINCE Jian Gao, Jiaoli Zhu and Jian Pan School ofCivil and Traffic Engineering, South China University of Technology, Guangzhou 510640, China A slope in Shaoguan ofGuangdong province is composed ofsoils with high water adsorption. Rainstorms usually decrease strength parameters of soils and lead to great landslide with severe soil disturbance. A popular unloading and anti-sliding supporting method usually couldn't achieve a good treatment effect. The closely spaced steel-tube and compressive grouting method, with two or more line steel flower tubes drilling into anti-sliding section of sliding mass and compressive grouting, can reinforce the soil around steel tubes. The steel tubes and around soil can form a solid continuous integrality acts as a retaining wall. Steel-tube and compressive grouting improve the mechanical capability of soil obviously so that the stability of slope is recovered with special unloading along slope and drain measures together. INTRODUCTION Landslide is a geological hazard. Its frequent occurrence is often followed by sudden traffic block, waterway obstruction and village destruction, causing great losses. Thus the prevention of landslide has always been a world-wide concern. Measures like retaining wall, anti-sliding piles, stabilizing piles with prestressed anchor cables, prestressed anchor cable pier, anchor-rope and groundsill, anchor cable frame and micro- piles group (Xie Xiao hua, 200 I; Xia Xiong, 2002; WeiShi zhuo, 2003; Zhao Weichu, 2005; Zhu Bao long, 2005; DengJian tiao, 2006; Zhou Bei, 2006) , have turned out to be effective in prevention against landslide. However, improvements have to be made to face landslides in complex geological conditions of various projects. Some landslides are too poor in soil conditions to be prevented by one anti-sliding retaining structure; therefore the combination of two or more techniques may become a necessity. This paper studies a new landslide treatment method: a new supporting structure -Steel-tube Bored Grouting Anti-sliding Retaining Wall by the joint use of steel-tube micro-piles (group) and grouting, with the remediation of landslide in Shaoguan of Guangdong Province as an example. THE STEEL TUBE BORED GROUTING ANTI-SLIDING RETAINING WALL (SBGARW) SBGARW is the joint use of grouting and steel-tube micro-piles group. The combination of
the steel-tube piles and grouting can be regarded in the stress analysis as an anti-sliding wall. What is most striking is that part of sliding mass is reinforced to be an anti-sliding mass to achieve the landslide treatment effect. With two or more line steel flower tubes drilling into anti-sliding section of sliding mass and compressive grouting, SBGARW can reinforce the sliding mass around steel tubes, rocks and soil on the surface of slide and under it. The closely spaced steel flower micro-tubes and around soil can form a solid integrality acting as a retaining wall. The distribution of steel-tube piles in the section and on the pl
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