摘要
坡沟系统是黄土高原的特有问题,目前有关坡沟系统重力侵蚀的研究相对较少,针对这种情况,采用了国际上最为通用的大型有限元分析软件ANSYS,结合强度折减理论,对碾庄沟流域坡沟系统概化模型在不同典型淤积厚度下的边坡稳定进行了计算,分析了随着流域淤地坝系淤积至不同的典型淤积厚度时坡沟系统的第一主应力和Y方向位移的变化云图,建立了稳定系数和淤积厚度、滑塌体积与淤积厚度的相关方程,揭示了随着淤积厚度的增加,坡沟系统稳定性逐渐增大,重力侵蚀量或侵蚀潜力显著减少的规律.
Slope-gully system is a peculiar problem in the Loess Plateau. The study on gravity erosion of slope-gully systems is relatively small. Aiming at this situation,and by means of ANSYS software and strength reduction theory, the slope stability under different typical deposition thickness is calculated by slope-gully systems physical model of Nianzhuang vally. The mutati.ve figure first principal stress and displacement of Y direction under different typical deposition thickness are analyzed. The relationship of stability factor and deposition thickness, volume slump and deposition thickness are respectively established. Law of stability of slope-gully systems gradually increasing and gravity erosion significant reduction with increasing of deposition thickness was revealed.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2009年第6期856-861,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家重点基础研究发展计划项目(2007CB407206)
"十一五"国家科技支撑项目(2006BAD09B02-01)
西部环境教育部重点实验室开放基金项目
关键词
重力侵蚀
坡沟系统
黄土高原
淤地坝
有限元强度折减法
gravity erosion
slope-gully systems
Loess Plateau
check dam
FEM strength reduction theory
