南水北调南干渠边坡有限元稳定性分析  

Finite element stability analysis on slope of South Main Canal of South to North Water Diversion Project

作　　者：张坤勇[1,2] 李广山[1,2] 李旺林[3] 杜伟[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]江苏省岩土工程技术工程研究中心,江苏南京210098 [3]济南大学环境与资源学院,山东济南250022

出　　处：《河北工程大学学报（自然科学版）》2016年第4期27-32,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(51578214);中央高校基本科研业务费专项资金资助项目(2015B17714);中国交通建设股份有限公司科技研发项目(2012-ZJKJ-11)

摘　　要：采用有限元强度折减法,对南水北调南干渠典型断面进行稳定性分析。计算采用邓肯非线性弹性模型,对渠道边坡的实际开挖施工过程进行模拟。以最大水平位移作为失稳判据,建立最大水平位移和折减系数之间关系曲线,得到不同折减系数下土坡应力变形分布规律和边坡安全系数。计算结果表明,有限元强度折减法,能够较真实地考虑土体应力应变关系和施工过程影响,所得边坡稳定系数略大于毕肖普法计算结果,计算断面稳定安全系数满足规范要求。The strength reduction finite element method was used to analyze the stability of the typical section of the South Main Canal of South to North Water Diversion Project. The Duncan - Chang non-linear constitutive model was employed to describe the stress and strain relationship of the soils. The displacement mutation of the maximal horizontal displacement of the slope was used as a criterion for evaluating the instability. The research results based on the FEM reduction stability analysis was veri-fied by traditional simplified Bishop Method. There is good accordance between both methods, which proved that the analysis is reasonable. And both results fulfil the designation requirement.

关 键 词：有限元 强度折减 边坡稳定 南水北调 邓肯模型 

分 类 号：TU43[建筑科学—岩土工程]