土工基础

›› 2019, Vol. 33 ›› Issue (3): 359-362.

• 工程实录 • 上一篇    下一篇

降雨作用下堆积层滑坡渗流特性及稳定性分析

喻 兴1，刘林洁2   

  1. （1.中建交通建设集团有限公司河南分公司，郑州 450052；2.郑州电力职业技术学院，郑州 451450）
  • 收稿日期:2019-02-25 修回日期:2019-03-08 出版日期:2019-06-20 发布日期:2019-08-16
  • 作者简介:喻 兴（1992-），男，助理工程师，硕士，研究方向为岩土工程。

Seepage and Stability Analyses of a Landslide in Colluvium under Precipitations

YU Xing1, LIU Linjie2   

  1. (1.Henan Branch of China Construction Communications Construction Group Co., Ltd., Zhengzhou 450052;
    2.Zhengzhou Electric Power Technology College, Zhengzhou 451450)
  • Received:2019-02-25 Revised:2019-03-08 Online:2019-06-20 Published:2019-08-16

摘要： 结合毕节市威宁县一滑坡实例，以饱和-非饱和土体渗流理论为依据，并运用seep模拟软件研究降雨入渗条件下不同时刻、不同高程上滑坡堆积层中孔隙水压力的变化情况以及滑坡稳定性系数的变化。结果表明，滑坡的稳定性系数在持续降雨及降雨结束过程中表现为先下降后回升；浅层滑坡的稳定性系数最低点发生在暴雨结束时刻，深层滑坡的稳定性系数最低点发生在暴雨停止后的一段时间，降雨入渗存在一定的滞后性。

关键词: 堆积层, 渗流, 孔隙水压力, 稳定性

Abstract: A landslide in Weining County of Bijie City was studied with SEEP software based on the saturatedunsaturated seepage theory in soils. The factor of safety in the stability analysis was obtained with various seepage time, pore water pressure at various locations in the slope. The results indicated that, during and after an extended precipitation, the factor of safety for the slope stability decrease first and then increase. The lowest factor of safety for the surficial slide model is at the end of the rainfall and the factor of safety for the deepseated slope stability occurred at time after the precipitation event.

Key words: Colluvium Soils, Seepage, Pore Water Pressures, Slope Stability