超深大型基坑支护结构的位移与受力特征分析

Character Analysis on Displacements and Forces of Retaining Structure in Super-Deep Foundation Pit Excavation

王府园3期基坑工程开挖深度大,达到20.0 m～24.0 m,面积约27 000 m2,没有采用地下连续墙作为支护结构,而采用常规的钻孔灌注桩加4层钢筋混凝土支撑的支护形式,取得了非常满意的效果。文章通过对支护结构监测数据的总结,较细致的分析了支护结构的位移与受力特征,并结合变化过程曲线总结了位移与受力的变化规律,对类似工程支护结构的设计、施工过程中对变形的控制、环境的保护等具有十分有益的参考意义。

The Foundation project＇s depth of Wangfuyuan is about 27000 Square meters deep, and reaches from 20.0 meters to 24.0 meters. We don＇t adopt underground sequence wall but the supporting structure of bored hole grouting pile and four layers of reinforced concrete, and we acquire satisfying effect. This paper analyzes the displacements and forces of retaining structure by summarizing the inspect data, and summs up the changing rule combining changing curve. It will benefit similar projects on the design of supporting structure, the control of deformation and protecting of environment.