分步开挖过程中基坑支护结构的变形和土压力性状研究  

Studies on displacements and earth pressures of pit-retaining structure during excavation by steps

作　　者：高伟[1] 窦远明[2] 周晓理[2] 彭芳乐[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]河北工业大学土木工程系,天津300132

出　　处：《岩土工程学报》2006年第B11期1455-1459,共5页Chinese Journal of Geotechnical Engineering

摘　　要：针对基坑分步开挖过程中支护结构的变形及土压力的性状进行了有限元分析,介绍了有限元建模和计算的过程,成功地计算出在分步开挖各个阶段,支护结构变形和主动区土压力的分布情况,并与实际监测数据和经验结果进行了比较。另外,还系统研究了基坑分步开挖的计算方法和过程,较详细地分析了基坑开挖荷载的形成情况,提出了一种适合工程实际的开挖荷载计算方法。In view of displacement and earth pressure behavior of pit-retaining structure during the process of deep foundation, finite element program was performed. FEM model and calculation process were analyzed. Displacement and active earth pressure distribution of pit-retaining structure were successfully calculated in every stage of excavation by steps, and the results were compared with the measured and empirical results. At the same time, the calculation progress and method of foundation excavation by steps were carefully studied. With the analysis of the formation of excavation load, the calculating method for excavation loads, suitable for engineering practices, was put forward.

关 键 词：基坑支护结构 分步开挖 土压力分布 开挖荷载 

分 类 号：TU476[建筑科学—结构工程]