基坑上下同步逆作法设计关键技术研究

Research of Foundation Excavation Using Top-down Method of Synchronous Construction of Superstructures and Underground Structures

上下同步施工逆作法因其施工作业流程与传统的顺作法以及逆作法不同,给地下结构的设计、施工带来众多新的技术问题。在阐述上下同步施工逆作法技术的工艺原理和施工作业流程的基础上,对逆作法设计计算包括基坑围护体系、水平支撑体系、竖向支承体系的设计方法进行了介绍,并结合南京青奥中心工程实例,对基坑上下同步逆作法关键技术进行研究。

The top-down method of synchronous construction of superstructures and underground structures brings some new technical problems about the design and construction of basements because the process is significantly different from the traditional method and the normal down-top construction method. On the basis of the technological principle and construction process of this new method,some key problems are analyzed and introduced,including the design of foundation excavation support,vertical and horizontal support systems. With the background of the project of the Youth Olympic Centre in Nanjing,the techniques of the synchronous construction of top-down method is researched.