主体地下结构与支护结构相结合的复杂深基坑分析.pdf

第 28 卷增刊岩土工程学报 Supp. 2006 年 11 月 Chinese Journal of Geotechnical Engineering Nov., 2006 主体地下结构与支护结构相结合的复杂深基坑分析徐中华 1 王建华 1 王卫东 2 1 . 上海交通大学土木工程系上海 200030 2. 华东建筑设计研究院上海 200002 摘要结合一具体工程对主体地下结构与支护结构相结合的复杂深基坑进行了分析基于土体硬化模型的平面有限元方法对基坑的施工过程进行了模拟结果表明该方法能较好地模拟围护结构的变形和墙后的地表沉降同时主体地下结构的巨大支撑刚度有效地控制了基坑的位移因而基坑开挖对地铁没有产生不利的影响采用考虑梁板共同作用的三维有限元方法分析了变标高的首层水平支撑体系的受力和变形基于切向弹簧边界分析了地下一层水平支撑体系的受力和变形分析结果成功地指导了基坑的设计关键词深基坑主体地下结构有限元分析水平支撑体系硬化模型中图分类号 TU471 文献标识码 A 文章编号 1000 –4548(2006)S0 – 1355 – 05 作者简介徐中华 1976- 男湖北咸宁人博士研究生主要从事基坑工程岩土工程数值分析等研究 Analysis of plicated deep excavations supported by substructures XU Zhong-hua 1 WANG Jian-hua 1 WANG Wei-dong 2 1. Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China; 2. East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China Abstract: The analysis of plicated deep excavation supported by substructures was presented. The plane strain FEM was adopted to model the excavation procedure by using an advanced soil model (hardening soil model). The results show that this method gives good prediction of both the deformation of the soil retaining structures and the settlement of the soils behind th e wall. Effect on the adjacent metro caused by the excavation was also analyzed. It shows that the adjacent metro structures are under go