IN-SITU MONITORING & NUMERICAL ANALYSIS ON RESIDUAL SOIL SLOPE INFILTRATION
More than 60 high residual soil slopes are excavated as the construction of a highway at southeast China. The highest slope is over 60 meters while annual rainfall in this area is 1882-2208 mm, and the amount in rainy season (from May to August) is about 70％. So the slopes stability in rainy season is a big problem in the project. In order to find out how deep in the slope the infiltration can reach and how the slope stability varies with infiltration process, in-situ monitoring and numerical analysis are carried out. A typical slope is selected in which the infiltration process is in-situ monitored. The monitoring system includes suction measurements, displacement measurements, ground water measurements, etc. Monitoring results show that suction of the soil deeper than 4m does not reduce during infiltration. The soil water characteristics curve (SWCC) and other parameters of soil are determined by laboratory tests. Unsteady-unsaturated seepage FEM analysis is carried out. Numerical analysis results show that the maximum depth infiltration reached is related to infiltration duration and soil parameters. The strength distribution in the slope is related to the suction distribution which can be predicted by seepage analysis. Then the slope stability is analyzed by FEM. The results show that the slope stability reduces along with the maximum depth infiltration reached,viz. the infiltration duration and soil parameters.
Junping Yuan Zongze Yin
Geotechnical Research Institute of Hohai University, Nanjing 210098, P.R.China
国际会议
南京
英文
637-642
2007-04-21（万方平台首次上网日期，不代表论文的发表时间）