Research on Unsaturated Soil Slope Stability under the Conditions of Rainfall Infiltration
-
摘要: 降雨，特别是强度大、历时长的暴雨，是引起边坡失稳破坏的主要因素。降雨期间，雨水的大量入渗使边坡土体的饱和度增加，非饱和区基质吸力降低，土体抗剪强度下降。当降雨的强度和持续时间超过一定程度时，便可能导致边坡失稳。在讨论非饱和土强度理论和渗流理论的基础上，探讨了近年来关于非饱和土边坡稳定性研究的进展。Abstract: Rainfall, especially the long-lasting heavy rainstorm, is a major cause of instability and failure of slope.During the rainfall, a large number of rain infiltrations will cause the slope soil saturation increases, the matrices suction of non-saturated region reduces and the soil shear strength decreases.When the rainfall intensity and duration exceeds a certain extent, it may lead to slope instability.Based on the discussion of unsaturated soil strength theory and percolation theory, the progress of unsaturated soil slope stability research in recent years was discussed.
-
Keywords:
- Slope stability /
- unsaturated soils /
- rainfall infiltration
-
-
[1] 熊俊.降雨条件下考虑饱和-非饱和两相流的边坡稳定性分析 [D].武汉:中国科学院武汉岩土力学研究所,2005. [2] Fredlund D G,Morgenstern N R,W ildger R A.The shear strength of unsaturated soils[J].Can.Ge-otech.J.,1978,15(3):313-321.
[3] 朱文彬.公路边坡降雨引起的渗流分析[J].长沙铁道学院学报,2002,20(2):104-108. [4] 黄玲娟,林孝松.滑坡与降雨研究[J].湘潭师范学院学报:自然科学版,2002,24(4):55-62. [5] 谢剑明,刘礼领,殷坤龙,等.浙江省滑坡灾害预警预报的降雨阀值研究[J].地质科技情报,2003,22(4):101-105. [6] 胡明鉴,张平仓,汪稳.降雨对滑坡的激发作用实验研究—以蒋家沟流域滑坡堆积坡地为例 [J].水土保持学报,2001,15(5):116-119. [7] Jagannath J h,I Hiroshi O Stefan M T,et al.日本阿波罗山国有林地降雨引起的滑坡研究 [J].水土保持科技情报,2001(5):10-14. [8] 姜华,尚云飞,王川川.基于三维地质建模技术的滑坡地质灾害评价[J].森林工程,2011(27)2:61-63. [9] 吴俊杰,王成华,李广信.非饱和土基质吸力对边坡稳定的影响[J].岩土力学,2004,25(5):732-737. [10] 朱文彬,刘保深.降雨条件下土体滑坡的有限元数值分析[J].岩石力学与工程学报,2002,21(4):509-512. [11] Sun Y N.A Study on stability analysis of shallow layer slope due to raining pemeation[J].Unsaturated Soils,1995(1):315-320.
[12] 陈守义.考虑入渗和蒸发影响的边坡稳定性分析方法[J].岩石力学,1997,18(2):8-12.
计量
- 文章访问数: 23
- HTML全文浏览量: 0
- PDF下载量: 1
下载:
