临时围檩与永久结构结合的应用与探讨

Application and Discussion of Temporary Pile and Permanent Structure Combination

在临轨地区,深基坑支护采用地下连续墙+水平支撑的方式,常规水平支撑随下部结构施工依次拆除,特殊工况下需水平支撑上部结构施工完成后,返回拆除水平支撑,即板底闷拆。文章以苏州新区污水处理厂项目基坑工程的设计和实施为背景,对支撑围檩与永久结构的连接以及施工缝的防水施工技术的设计、实施做了比较详细的介绍,为同类工程的实施提供借鉴和参考。

In the area adjacent to the rail,the pattern"diaphragm wall+horizontal support"is adopted for deep foundation pit shoring.The conventional horizontal support is dismantled accordingly with the construction of lower structure.Under special working conditions,after the construction of upper structure above horizontal support is completed,the horizontal support then can be demolished,that is to say,"Closed Dismantling of Slab-Bottom".The paper takes the design and implementation of foundation pit project of sewage treatment plant in Suzhou New Area as researchbackground,and introduces in detail the connection between supporting pile waling and permanent structure as well as the design and implementation of waterproof construction technology of construction joints,which provides reference for the implementation of similar projects.