深基坑开挖引起邻近管线破坏分析  

ANALYSIS OF NEARBY PIPELINE DAMAGE INDUCED BY DEEP EXCAVATION

作　　者：段绍伟[1] 沈蒲生[2] 

机构地区：[1]湖南科技大学土木工程学院,湘潭411201 [2]湖南大学土木工程学院,长沙410082

出　　处：《工程力学》2005年第4期79-83,共5页Engineering Mechanics

基　　金：国家自然科学基金资助项目(10171029);湖南省自然科学基金资助项目(00JJY2055)

摘　　要：利用非线性有限元方法计算了深基坑开挖引起的地表沉降量与墙体侧向挠度。采用有厚度的接触面单元模拟土体与支护墙体、土体与地下管线的相互作用,分析了土体与地下管线接触面的应力应变关系,并建立了接触面上的应力应变方程。探讨了地表沉降、墙体侧向挠度对地下管线拉裂破坏的影响。算例分析表明,深基坑开挖对邻近管线破坏极大,因而提出了深基坑支护结构设计时应采取的具体措施。The ground surface settlement and lateral deflection of retaining wall for deep excavations are calculated using nonlinear finite element method. The interaction of soils and retaining walls, soils and buried pipelines are simulated by an interface element with thickness. The stress and strain equations for the interface are established. The effect of ground settlement and lateral deflection on damage of buried pipelines is studied. Examples show that the damage effect of deep excavations is great, and a method is suggested to resolve the problem in design of retaining structures.

关 键 词：深基坑 地下管线 有限元 接触面单元 地表沉降 

分 类 号：TU433[建筑科学—岩土工程]