地铁车站抗拔桩设计与施工存在的问题及对策

Problems and Countermeasures in the Design and Construction of Uplift Piles in the Subway Station

抗拔桩作为地铁车站永久结构的一部分,其设计使用年限为100年,是抵抗地铁车站在水浮力等外力作用下产生整体向上位移的主要构造措施。为此,文章结合地铁建设设计、施工工作经验,从桩型选择、承载力计算及影响因素、耐久性设计、可靠性设计四个方面对地铁车站抗拔桩设计问题,从试桩施工问题、施工质量控制问题两个方面对地铁车站抗拔桩施工问题进行了探讨。

As a part of permanent structure of the subway station, the uplift pile has a design life of 100 years, which is the main structural measure to resist the overall upward displacement of the subway station under the action of water buoyancy and other external forces. Therefore, combined with the subway construction design and construction work experience, this paper discusses the design of uplift pile in subway station from four aspects of pile type selection, bearing capacity calculation and influencing factors, durability design and reliability design, and discusses the construction of uplift pile in subway station from two aspects of test pile construction and construction quality control.