2022 Volume 17 Issue 2 Pages 227-245
The stability analysis for sliding collapse of hillside residential land, which is regulated by laws and regulations, should be performed by the two-dimensional slice method according to the national technical guidelines. Sliding collapse damage can occur by landslide deformation, which is a residual deformation phenomenon, as well as by slip failure. Therefore, creating an appropriate model according to the causal factors of predicted damage forms is a challenge for stability analysis. In order to predict the occurrence of landslide deformation accurately, the present study examined a method for constructing a practical stability analysis model that takes into consideration the causal factors of landslide deformation. In the hillside residential lands where landslide deformation occurred in Sendai City, soil and groundwater characteristics were evaluated and causal factors were analyzed to help establish a model of banking section that properly reflects those factors having a large impact on fluctuations. In addition, the concept of appropriate excess pore water pressure ratio and strength parameters in the stability analysis is presented in consideration of the response acceleration spectrum and safety factors obtained from the simulation analysis based on the dynamic effective stress FEM and the circular slip method.
