考虑施工及软土地基固结过程的填土岸坡稳定性分析方法  

Stability Analysis Method of Filled Soil Bank Slope Considering Construction and Consolidation Process of Soft Soil Foundation

作　　者：李亚生[1,2,3] 周翠英[1,2] 张惠明[2] 

机构地区：[1]中山大学工学院,广东广州510275 [2]中山大学岩土工程与信息技术研究中心,广东广州510275 [3]中水珠江规划勘测设计有限公司,广东广州510610

出　　处：《水电能源科学》2011年第10期67-70,共4页Water Resources and Power

基　　金：国家自然科学基金资助重点项目(41030747);国家自然科学基金资助项目(40672194);国家高技术计划(863计划)基金资助项目(2007AA11Z112)

摘　　要：针对填土岸坡是在固结完毕的地基土上填筑而成的特点,利用有限元软件,分别模拟了岸坡填筑及软土地基土固结两个施工阶段,采取基于三点位移突变判据为主的有限元强度折减法分析其稳定性;并研究了填土后地基土强度的增长对岸坡稳定性影响。结果表明,考虑填土施工过程的岸坡稳定性分析较符合工程实际,填后地基土强度的增长使岸坡稳定性提高,但提高的幅度小于地基土增长的幅度,因而考虑地基土强度增长后的岸坡稳定性分析更接近工程实践。Considering the two construction phases of bank slope constructing and soft soil foundation consolidation, the strength reduction finite element method mainly basing on the criterion of uncontrolled displacement at three charac teristie nodes is used to analyze the stability of bank slop by using finite element software. Then, the stability increase of bank slope caused by the strength increase of foundation soil is studied. The result shows that the bank slope stability analysis method accords with engineering practice for considering filled soil construction; the stability of bank slope increases because of the strength increase of foundation soil, but the increase amplitude of bank slope stability is smaller than the increase amplitude of foundation soil strength. Therefore, the bank slope stability analysis method more accords with engineering practice with considering the strength increase of foundation soil.

关 键 词：有限元 强度折减法 填土过程 强度增长 岸坡稳定分析 

分 类 号：TU452[建筑科学—岩土工程] TU457[建筑科学—土工工程]