A numerical simulation study of landslides induced by irrigation in Heifangtai loess area—A case study of Huangci

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Lian, Baoqin^1 ; Wang, Xingang^1,2 ; Zhu, Rongsen^2 ; Liu, Jie^2 ; Wang, Yupeng^2

Key Lab. of Western China's Mineral Resource and Geological Engineering of Ministry of Education, School of Geology Engineering and Surveying, Chang' An University, Xi'an, SHANXI

710054, China^1

State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an

710069, China^2

关键词: Analysis and calculations;    Horizontal displacements;    Long-term irrigations;    Numerical simulation studies;    Potential slip surface;    Saturated state;    Slope surfaces;    Typical landslide;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/3/032064/pdf
DOI  :  10.1088/1755-1315/108/3/032064

来源: IOP

【 摘 要 】

In order to investigate the mechanism underlying the formation of landslides induced by irrigation in Heifangtai loess area, the Phase2 software was used for numerical simulation of the typical profile of Huangci landslide, and conditions of the landslide in natural and saturated states were respectively simulated. The following findings have been obtained through analysis and calculation: In natural state, the maximum shear strain increment is 0.072, and the maximum horizontal displacement is 0.096m, observed on the slope surface; the slope is stable at this point. In saturated state, the maximum shear strain increment is 0.084, and the horizontal displacement on the potential slip surface is especially large, which is 0.168m; the slope is unstable at this point. The Huangci landslide is a typical landslide in the Heifangtai landslide group containing landslides with similar characteristics. It can be preliminarily concluded that Heifangtai landslides are also induced by the increase of moisture content resulting from long-term irrigation.