Analysis of mechanism and mechanical characteristics of landslide disaster
YANG Guanghua1，2，3，ZHONG Zhihui1，3，4，ZHANG Yucheng1，2，FU Xudong3
(1. Guangdong Research Institute of Water Resources and Hydropower，Guangzhou，Guangdong 510610，China；2. Geotechnical Engineering Technology Center of Guangdong Province，Guangzhou，Guangdong 510640，China；3. School of Civil and Architectural Engineering，Wuhan University，Wuhan，Hubei 430072，China；4. Department of Civil Engineering，Guangdong Construction Polytechnic，Guangzhou，Guangdong 510425，China)
Abstract：Landslide disaster mainly means that the sliding body suddenly produces massive soil sliding. Great sliding force could destroy construction，which would cause great losses. The variable-modulus strength reduction method is adopted to analyze displacement process before landslide sliding. It is found that the displacement of retrogressive landslide is more mutational than displacement of thrust load-caused landslide. The retrogressive landslide causes landslide disaster much easier. In contrast，thrust load-caused landslide has obvious warning displacement；therefore，the concept of plastic slope is proposed. Plastic slope can avoid or reduce landslide disaster. In addition，analysis results of calculation examples show that in retrogressive landslide or when the stress level in different part of sliding surface is very different，safety factor by the traditional limit equilibrium method has risk of overestimation. The above conclusions would give new research ideas to avoid or reduce landslide disaster.
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2016, Vol. 35 
