【摘要】 本文在以前工作和上海时空软土工程研究咨询中心多年的研究成果的基础上,提出了在软土地区基坑围护结构设计中,考虑时空效应的空间计算模型以及有限元子结构解法,并编制了相应的增量法程序。通过某基坑围护实例的分析,表明了本文所述的方法简便可行、安全可靠,不但能较好地反映基坑开挖过程中支护结构的受力和变形情况,而且能考虑支撑系统中节点位移引起的次应力,对研究环境保护对策有重要指导意义。更多还原

【Abstract】 In this paper, the space computation model on frame bracing system by using the rule of Time-Space Effect(TSE) ,and its finite element sub-structure technique are proposed based on the previous work~[3] and the many years results of Shanghai Time-Space Soft Soil Engi-neering Research & Consultant Center~[1-2] The computer codes which discribe the incremen-tal process have been programmed. With the application of the method to a practical engi-neering example, it is indicated that present model can be utilized to simulate the excavation process with high efficiency and to give good results of the stress and deformation distribu-tions in the braced structure. Also the secondary stress of bracing system induced by the de-formation of nodes can be considered. This work is significant to the study of controlling ground movement around deep excavation in Shanghai soft soil.更多还原