摘要
通过模型试验,研究不同材料堆积体在降雨作用下的滑坡机理。模型试验中,针对凹形堆积体边坡进行了不同堆积材料的试验。试验结果分别记录了黏性土、砂土以及碎石土边坡随降雨时效的坡面变形特征、边坡内部孔隙水压力变化特征,并对监测结果进行了分析。试验结果表明:孔压的变化规律与坡面变形规律具有一致性,降雨通过影响边坡内部孔隙水压力的变化来影响边坡的稳定性。同时,拟合了降雨量与边坡位移的关系,并对比了不同堆积材料对边坡稳定性的影响。
Most of the landslides were triggered by earthquakes. Loose deposits are often in critical stable states. Factors such as rainfall may reactivate slopes to slide once more. In this paper,by using the model box and raining equipment,we conducted experiments on deposit slopes with different soils,concluding clay,sand and gravel. The deformation and pore water pressure were timely recorded during the test. The results show that the deformation and pore water pressure change in the same trend,indicating that rainfall affect slope stability by changing the pore water pressure. Regression equations on the relation between rainfall and displacement of the slope surface were obtained. The influences of slope stability on the permeability of the deposit were also studied.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2016年第4期135-140,共6页
Hydrogeology & Engineering Geology
基金
国家自然科学基金项目(41372272)
"十二五"国家科技计划支撑计划(2012BAJ11B04)
