_两墙合一_深基坑工程设计中的若干技术问题及对策------施工栈桥的设计.pdf

T TU473.2 A 2006)S0159006 (1980 ) Design of dual-purpose diaphragm walls in deep foundation pits SONG Qing-jun, WANG Wei-dong, WENG Qi-ping East China Architectural Design Research Institute Co., Ltd., Shanghai 200002, China Abstract: Diaphragm walls are commonly used as retaining structures in many deep foundation pits, especially when the environment protection is severe. The design of dual-purpose diaphragm walls means that the walls are used as retaining walls as well as outside walls of the basement. It has been proved that the dual-purpose diaphragm walls are economic. The foundation pit of Shimao North Beach Hotel project has an area of 12000 m2 and depth of 14.3~15.3 m. Dual-purpose diaphragms are applied successfully in this deep foundation pit. Some special technologies such as junction of diaphragm walls and temporary retaining structures, design of T-shape diaphragm walls, brace designed as trestle and so on are applied. These solutions provide a good reference for other similar projects. Key words: dual-purpose diaphragm wall; T-shape diaphragm; brace designed as trestle 34 34 2 15.3 m 12000 m 14.2 m 45 2