施工技术 2013年10月上 22 CONSTRUCTION TECHNOLOGY 第42卷第19期 D0I:10.7672/sgjs2013190022 某工程软土基坑支护设计及钢斜撑的应用 郭学伟，庞爱红，徐明 (中国建筑第八工程局有限公司，北京100097) [摘要]天津奕聪花园工程地下室平面设计与基坑支护相结合，软土基坑采用灌注桩分级支护.钢斜撑在两级灌 注桩间增加侧向刚度，明确钢斜撑处结构施工与土方开挖之间的顺序.采用三轴搅拌桩进行止水帷幕和基坑内设 大口井降水的方法进行基坑降水.通过重点监控地下室水平和竖向后浇带节点防水施工质量，满足地下室无渗漏 要求.工程实践表明，采用此技术降低了施工成本，提高了施工效益. [关键词]地下工程；深基坑；支护；钢斜撑；设计；施工 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2013)19-0022-04 Design of Soft Soil Foundation Excavation Support in Some Project and Application of Steel Brace Guo Xuewei Pang Aihong Xu Ming China Construction Eighth Engineering Division Co.Lid.Beijing 100097 China) Abstract:Design of basement bined with foundation excavation supports is adopted in some project in Tianjin and the soft soil foundation excavation adopts classified support with bored piles.Steel brace was used among bored piles to improve the lateral stiffness and the construction process of steel brace and earth excavation were determined.Three axes agitating pile was used for waterproof curtain and big well was used for dewatering.Waterproofing construction quality was ensured by monitoring.Engineering practice shows that application of the technology reduces the cost and improves construction benefit. Key words:underground;deep foundation excavation;supports;steel brace;design;construction 1工程概况 2.2水文地质条件 天津奕聪花园工程位于天津市南开区，北至奥 场区水文地质条件（渗透性指标）如表2所示. 城住宅和奥城商业广场、东至奥维拉住宅区、南至 场区地下潜水埋深1.33-1.75m 年变幅0.5~ 红旗南路、西至彩虹花园居住区.其中，酒店式公 1.0m.微承压水含水层为⑤，层粉砂层，其上④层 寓2栋，为5 6号楼，分别为32 38层，带2层地下 粉质黏土为隔水顶板...
某工程软土基坑支护设计及钢斜撑的应用.pdf
