南联络通道基坑支护咬合桩施工技术

Construction technology of foundation pit support bitten pile in South Connection Channel

支护工程施工质量直接关系到基坑的安全,也是基坑施工中必须解决的关键问题。咬合桩用于基坑支护工程中既能支护又能防水,是一种具有广泛应用前景的新型基坑支护形式。为解决基坑支护咬合桩施工问题,结合南联络通道基坑支护工程的成功实践,从基坑支护咬合桩的布置、施工顺序、导向槽施工、埋设护筒、泥浆制备、钻孔施工、安装钢筋笼、灌注砼等方面详细阐述了基坑支护咬合桩施工技术,可供同类工程参考。

The construction quality of the support project is directly related to the safety of the foundation pit,and it is also a key issue that must be solved in the foundation pit construction.The bitten pile can be used for supporting and waterproofing in the foundation pit support project.It is a new type of foundation pit support with wide application prospects.In order to solve the construction problem of the foundation pit support bite pile,combined with the successful practice of the foundation pit support project of the South Connection Channel,this paper elaborates on the construction technology of the foundation pit support bite pile,including the arrangement of the bitten pile from the foundation pit support,the construction sequence,the guide groove construction,the buried casing,the mud preparation,and the drilling,the construction technology,installation of steel cages,pouring concrete,etc.,which can be used as reference for similar projects.