Collapse Failure Modes and Dem Numerical Simulation for Loess Slopes
详细信息
- 责任者：Wang Genlong (Xi’an Center of Geological Survey ; China Geological Survey ; Xi’an 710054 ; China) ; Zhang Maosheng
- 刊名：Journal of Engineering Geology
- 出版年：2011
- 卷期：19(4)
- 关键词：黄土类土 ; loessial soil ; 崩塌 ; avalanches
- 页码：p.541-549
- 图表：20 illus., 1 table, 15 refs.
- 分类号：1800
- 出版序号：1448
- issnNo：ISSN1004-9665
- isbnNo：CN11-3249/P
摘要
At first, this paper studies loess topography, loess type and structure, loess vertical joints, slope erosion, rainfall and human activities. The results show that both the vertical joints in loess and erosion at the toe of slope are the main causes of loess collapse. Secondly, based on field investigation and analysis on the geological phenomena, four typical failure modes are put forward to describe different types of loess collapses. By means of discrete element method, a typical loess slope of Heilonggou is simulated. The failure process of loess collapse includes erosion flaking, local recessing, vertical joints opening, drop breakup, accumulation at the toe of the slope.