摘要
对于降雨诱发的顺层岩质滑坡,当滑坡后缘有裂隙存在时,水通过裂隙渗入坡体内部导致滑带土的软化和抗剪强度减小,同时,由于裂隙水的静水压力以及扬压力的影响,滑坡体稳定性随降雨而动态变化;对于降雨诱发的土质滑坡,坡体的增重和滑面的抗剪强度降低使滑坡体稳定性不断变化。通过考虑岩质滑坡后缘裂隙静水压力、扬压力、滑面软化的动态变化过程以及土质滑坡浸润面高度、软化作用的动态变化过程建立了这两类滑坡的稳定性系数预警模型,并验证了模型在顺层岩质滑坡中的准确性。
For rainfall induced bedding rock slope,when the back landslide has fissures,water leads to sof-tening sliding zone and reduce shearing strength.Because of the influence of fissure water hydrostatic pressure and uplift pressure,the stability of the landslide have dynamic change with rainfall;for the soil landslide induced by rainfall,the slope body weight increase and the shear strength reduction makes the stability of the landslide chan-ging.By considering the dynamic change process of hydrostatic pressure,uplift pressure,soften sliding surface in rock landslide and phreatic surface height,softening effect in soil landslide to establish the stability coefficient early warning model of the two kinds of landslide,and validate the model accuracy in layered rock landslide.
出处
《灾害学》
CSCD
2015年第3期38-42,共5页
Journal of Catastrophology
基金
国家重点基础研究发展计划(2013CB733200)
中国地质调查局地质调查项目(水[2014]02-028-004)
四川省科技支撑计划(2012SZ0066)
关键词
滑坡
降雨
顺层岩质
土质力学模型
预警
landslide
rainfall
layered rock
soil mechanical model
early warning
