工程地质学报2011，Vol.19Issue(4)：541-549,9.
黄土崩塌破坏模式及离散元数值模拟分析
COLLAPSE FAILURE MODES AND DEM NUMERICAL SIMULATION FOR LOESS SLOPES
摘要
Abstract
Loess collapse is a type of very common geological disasters in the loess plateau area of Northwest China. 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 modesare put forward to describe different types of loess collapses. They are tensile crack-falling, tensile crack-toppling,tensile crack-subsiding and tensile crack-sliding. 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. Research findings in the paper are significant to prevention and treatment for loess collapse in the loess plateau area of Northwest China.关键词
垂直节理/黄土崩塌/坡脚侵蚀/破坏机制/离散元数值模拟Key words
Vertical joints/ Loess collapse/ Toe erosion/ Failure mechanism/ DEM numerical simulation分类
天文与地球科学引用本文复制引用
王根龙,张茂省,苏天明,曾庆铭..黄土崩塌破坏模式及离散元数值模拟分析[J].工程地质学报,2011,19(4):541-549,9.基金项目
中国博士后科学基金(20090450565)交通部西部交通建设科技项目(200831822353). （20090450565）
