工程地质学报2013，Vol.21Issue(2)：297-303,7.
台风滑坡变形破坏机制模型试验研究
MODEL EXPERIMENTS FOR DEFORMATION AND FAILURE MECHANISM OF TYPHOON INDUCED LANDSLIDE
摘要
Abstract
This paper analyzes the geological hazards induced by typhoon in Wenzhou. The landslide with arbor was most typical. Physical model experiments well reappear the the slope deformation-failure process caused by typhoon. The connection of failure phenomena between bare and arbor slope was analyzed after the induction and summarization on the characteristics of deformation and failure. Then a comprehensive analysis is made. The deformation and failure mechanism of typhoon landside is initially obtained. The results show that the slope is more likely to be damaged coupling typhoon with arbor after soil is softened by stronger rainfall. The main actions of typhoon to slope are the rain wash and softening caused by rainstorm with dynamic effect of gale, which is significantly different from general landside. When arbor roots are above the sliding zone, the roots go against the stability of slope under typhoon calamity. Soil mass failure may be caused in slope front areas. A phenomenon of " wind liquefaction" is found in the model testing. The reason is that soil liquefaction is formed with the cyclic loading of fluctu- ating wind to soil around root. It aggravates the wind throw of trees, makes the slope destruction complicated. Therefore, the deformation and failure mechanism of typhoon landslide is summarized as"the rain wash→soil softening→wind action→arbor swinging→ soil loosening → crack development→ front soil failure→landslide formation".关键词
台风滑坡/乔木类斜坡/模型试验/变形破坏机制/风振液化Key words
Typhoon landslide, Arbor slope, Model test, Deformation and failure mechanism, Wind liquefaction分类
天文与地球科学引用本文复制引用
孔维伟,赵其华,韩俊,王照财..台风滑坡变形破坏机制模型试验研究[J].工程地质学报,2013,21(2):297-303,7.基金项目
国家自然科学基金项目(40772177),国家重点基础研究发展计划(973)项目(2011CB013501),长江学者和创新团队发展计划项目(IRT0812). （40772177）
