深基坑工程中的长短双排桩加锚索组合支护结构

Combined Retaining Structure of Long Short Double Row Piles and Anchor Cables in Deep Foundation Pit Engineeringt

为保证湿陷性地质条件下基坑支护和降水的安全,介绍了一种长短双排桩再加一道旋喷桩锚索的设计、施工实例的应用。阐述了长短双排桩加锚索设计理论的计算模式及支护体系的施工、监测、降水工艺。项目应用结果表明,该支护体系结合了双排桩与锚索各自的受力特点与优点,达到了预期受力变形的使用效果,为复杂条件下深基坑的支护提供了成功案例。

In order to ensure the safety of foundation pit support and dewatering under collapsible geological conditions,this paper introduces the design and application of a long short double row piles and a jet grouting pile anchor cable.The calculation model of the design theory of long short double row piles with anchor cables and the construction,monitoring and dewatering technology of the support system are described.The application results of the project show that this support system combines the stress characteristics and advantages of double row piles and anchor cables,achieves the expected stress deformation effect,and provides a successful case for the support of deep foundation pit under complex conditions.