苏州市演艺中心二期基坑支护设计与实测研究

Study on Support Design and Monitoring of Deep Foundation Pit in Suzhou Performing Arts Center Phase Ⅱ

在深基坑开挖施工中,钻孔灌注桩加混凝土内支撑具有挡土作用,而水泥土搅拌桩和压密注浆形成的双层止水帷幕则具有止水作用。以苏州市演艺中心二期基坑工程为实例,根据基坑开挖施工过程中的实测数据,分析和研究了支护结构的变形、地下水位以及周边建筑物沉降的变化,对此基坑工程支护结构以及止水帷幕的设计施工方案进行验证。结果表明:利用上述技术措施效果良好,对苏州地区类似基坑围护设计和施工具有一定的借鉴意义。

During excavation of deep foundation pit, the bored piles combined with concrete struts have a positive role in retaining soil, while double waterproof curtain formed by cement-soil mixing piles and dense-compacted grouting can effectively cut off water. Based on the project of Suzhou performing arts center phase Ⅱ , measured datas in the process of excavation are given. Then the deformation of retaining structure, change of underground water , settlement of surrounding buildings are also analyzed and studied to verify design and construction projects of support structure and waterproof curtain of this example. The results show that these measures achieve good implementation. It could provide references and suggestions for similar foundation pit projects in Suzhou area.