东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (11): 1646-1649.DOI: 10.12068/j.issn.1005-3026.2014.11.028

• 机械工程 • 上一篇    下一篇

考虑二维降雨入渗的非饱和土边坡稳定性分析

付建新1,2，谭玉叶1,2，宋卫东1,2   

  1. (1北京科技大学 金属矿山高效开采与安全教育部重点实验室， 北京100083；2北京科技大学 土木与环境工程学院， 北京100083)
  • 收稿日期:2013-09-12 修回日期:2013-09-12 出版日期:2014-11-15 发布日期:2014-07-03
  • 通讯作者: 付建新
  • 作者简介:付建新(1986-)，男，河北沧州人，北京科技大学博士研究生;宋卫东(1966-)，男，河北廊坊人，北京科技大学教授.
  • 基金资助:
    国家自然科学基金资助项目(51274023);中央高校基本科研业务费专项资金资助项目(FRF-SD-12-003A).

Analysis on Stability of Unsaturated Soil Slope Considering Two Dimensional Rainfall Infiltration

FU Jianxin1,2， TAN Yuye1,2， SONG Weidong1,2   

  1. 1. State Key Laboratory of HighEfficient Mining and Safety of Metal Mines， Ministry of Education， University of Science and Technology Beijing， Beijing 100083， China; 2. School of Civil and Environment Engineering， University of Science and Technology Beijing， Beijing 100083， China.
  • Received:2013-09-12 Revised:2013-09-12 Online:2014-11-15 Published:2014-07-03
  • Contact: TAN Yuye
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摘要： 以非饱和土边坡体积含水率为控制变量，基于非饱和土水分运移基本方程建立了二维降雨入渗计算模型，并编制了计算程序.充分考虑降雨中的水平和垂直入渗及降雨过程中土体入渗能力的变化，建立了可考虑体积含水率变化的非饱和土边坡稳定性分析模型，实现了边坡稳定性的实时分析，并可搜索最危险滑裂面.通过具体工程案例的分析可知，边坡中的体积含水率与边坡的稳定性有密切的关系，其中边坡初始含水率影响最大，而降雨强度则较小.降雨对浅层边坡稳定性影响较大，随着降雨时间的增加，含水率由浅到深逐渐减小，而最危险滑裂面则逐渐向浅层移动.

关键词: 二维降雨入渗, 非饱和土边坡, 瞬态含水率, 稳定性分析, 程序设计

Abstract: Based on the basic equations of moisture migration in unsaturated soil， the twodimensional infiltration model of unsaturated soil that uses volumetric water content as control variable was proposed， and is programmed. The program could take the horizontal and vertical infiltration and infiltration capacity in the process rainfall into account. The numerical model for stability analysis of unsaturated soil slope that considering the changes of volumetric water content was constructed， in which the instantaneous moisture was timely imported in order to achieve realtime analysis of slope stability， and to search for the most dangerous slip surface. The engineering applications show that slope stability are closely related with volumetric water content， influence of initial moisture content is the greatest and the rainfall intensity is smaller. With the increase in the time of rain， the moisture content decreases from shallow to deep gradually while the most dangerous slip surface move gradually to shallow.

Key words: twodimensional rainfall infiltration, unsaturated soil slope, transient moisture content, stability analysis, programming

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