岩土力学Issue(2)：487-494,8.DOI:10.16285/j.rsm.2015.02.026
缓倾软硬岩互层边坡变形破坏机制模型试验研究
Model experimental study of deformation and failure mechanism of low-angled slopes with interbedding of soft and hard rocks
摘要
Abstract
A lab model experiment of low-angled slope with interbedding of soft and hard rock is designed on the basis of geological analysis and similarity theory. The lab test is based on Peng Jiawan slope at Yi-Ba highway which has interbedding of soft and hard rocks with low dip angle. In the model tests, slope excavation tests are used to simulate the engineering excavation (or valley incision); and the water injection softening processes are used to simulate the rainfall infiltration. The results show: under both excavation and rainfall infiltration conditions, the deformation modes of the slope are sliding-tension at first and overall creep-slippage in the latter; and the failure mode is overall slip failure along the sliding zone of deep soft rock. Strictly speaking, the deformation of hard rock strata differs from the deformation of soft rock strata. Hard rock deforms mainly in sliding-tension but soft rock deforms mainly in overall creep-slippage. Changes of the condition of deep soft rock affect the total stability of the interbedding slope mostly. Both excavation and rainfall infiltration would lead to decline of stability of the slope. The free surfaces and micro-fissures induced by excavationare the basis triggering slope failure, and the rainfall provides incentives to the slope failure .关键词
缓倾软硬岩互层/模型试验/开挖/注水/变形破坏机制Key words
low-angled slope with interbedding of soft and hard rocks/model experiment/excavation/water injection/deformation and failure mechanism分类
建筑与水利引用本文复制引用
宋娅芬,陈从新,郑允,夏开宗,欧哲,夏天游,周意超..缓倾软硬岩互层边坡变形破坏机制模型试验研究[J].岩土力学,2015,(2):487-494,8.基金项目
西部交通科技项目（No.2009353342540）。 （）
