土工基础

›› 2013, Vol. 27 ›› Issue (2): 89-92.

• 工程实录 • 上一篇    下一篇

考虑降雨入渗的玄武岩残积土边坡稳定性分析

康厚荣   

  1. (贵州省交通建设人才基地,贵阳 550001)
  • 收稿日期:2012-12-28 出版日期:2013-04-20 发布日期:2013-04-26
  • 作者简介:康厚荣（1963-），男，贵州遵义人，博士，研究方向为交通科技与科研。
  • 基金资助:

    交通部西部交通建设科技项目（No. 2009 318 802 074）

Slope Stability Analysis of Basaltic Residual Soils Considering Rainfall Infiltrations

KANG Hourong   

  1. (Communication Infrastructure Construction Expert Base of Guizhou Province, Guiyang, 550001)
  • Received:2012-12-28 Online:2013-04-20 Published:2013-04-26

摘要： 针对玄武岩残积土裂隙性和渗透性特点，引入土壤优势流概念，利用流固耦合有限元方法对多种支护方案下玄武岩残积土边坡稳定性进行分析。计算结果表明：采用片石混凝土挡墙、预应力锚索和锚杆挂网喷射混凝土等联合处治措施，能够确保玄武岩残积土边坡在极端降雨条件下的稳定性；降雨入渗对边坡失稳影响明显，考虑土壤优势流获取的边坡稳定性安全系数偏低，可作为边坡设计的安全储备。

关键词: 降雨入渗, 优势流, 玄武岩残积土, 安全系数

Abstract: The fissures and the high permeability are the characteristics of the basaltic residual soils. This paper presents the finite element analysis of the stability problems of the basaltic residual soil slopes strengthened by different supporting methods using preferential flow and fluidstructure interaction concept. The results show that, under the combination of concrete retaining wall panels, prestressed ground anchors with the shotcrete on the steel nettings, the basaltic residual slopes could stay stable under extreme rainfall conditions. The results also indicate that the precipitation has a significant adverse effect on the safety factor of the treated residual soil slopes.

Key words: Rainfall Infiltration, Preferential Flow, Basaltic Residual Soils, Safety Factors