复杂条件下多梯度基坑施工力学效应分析  

Construction Mechanical Effects Analysis of Multiple Gradient Foundation Excavation Under Complicated Conditions

作　　者：濮仕坤[1,2] 李二兵[1] 谭跃虎[1] 卞少帅 

机构地区：[1]解放军理工大学国防工程学院,江苏南京210007 [2]河海大学工程岩土科学研究所,江苏南京210098

出　　处：《施工技术》2017年第1期28-31,共4页Construction Technology

摘　　要：分析了某大型多梯度基坑的施工力学性状,其支护结构满足受力及变形要求且模拟数据与实测数据有较好的一致性。将该多梯度基坑进行强度折减分析,对比了无支护无支撑、有支护无支撑、有支护有支撑3种情形的安全系数、塑性变形和位移。结果表明,对于不同的支护情形,塑性区开展越充分,安全系数越大,而经过折减分析后模型产生的变形越大,安全系数越小。The construction mechanics property of a large multiple gradient foundation excavation is studied,its supporting structure satisfies the requirement of the stress and deformation,and the simulation data has good consistency with the test data. The strength reduction method is used to evaluate the safety factor of the foundation excavation in three different kinds of situations. The results show that for different supporting conditions,the plastic zone to develop more fully,safety coefficient is larger,and after reduction analysis model of deformation,the greater the safety coefficient is smaller.

关 键 词：基坑 支护结构 施工力学 强度折减 安全系数 

分 类 号：TU753[建筑科学—建筑技术科学]