长大型深基坑纵向分幅施工技术

Longitudinal Framing Construction Technology of Long and Large Deep Foundation Pit

为确保长大型深基坑施工期间上方道路及地下管线的正常运行,结合上海市中山东二路地下空间开发工程,对长大型深基坑的纵向分幅施工方法进行了研究。通过采用结构顺作方式,先接梁后拆墙再接板,以梁代撑达到封堵墙拆除和结构对接的目的,确保了分幅施工基坑结构受力稳定,有效解决了施工期间交通维持和管线保护的问题,对于中心城区复杂环境下的深基坑施工有显著的借鉴价值和推广意义。

To ensure the normal operation of the above roads and underground pipelines during the construction of the long and large deep foundation pit,combined with the underground space development project of Zhongshang Road(E-2)in Shanghai,the Iongitudinal framing construction method of the long and large deep foundation pit is studied.By adopting the sequential operation mode of structure,the beams are connected first,and then the wall are removed and the plates are connected,and the purpose of blocking the wall removal and structural connection is achieved by using the beam instead of the support.It ensures the stress stability of the foundation pit structure during framing construction,and the problems of traffic maintenanee and pipeline protect!on during the construction are effectively solved.It has sign ificant ref ere nee value and popularization sign ifica nee for the con struction of deep foun datio n pit in the complex environment of central urban area.