上海地铁内江路站基坑支护结构设计

上海市轨道交通12号线内江路站紧邻黄浦江,站位所处地层主要为流塑状淤泥质黏土,地下水位埋深约1m,地质条件极差。以该车站基坑支护结构设计为依托,详细阐述采用SAP84有限元程序建立荷载-结构模型对叠合墙体系进行内力增量分步叠加法计算的过程,以及钢筋混凝土与钢管相结合的内支撑体系设计。目前,车站的主体和3个附属结构已经完工,工程进展顺利,说明基坑支护结构设计方案合理。

Structure Design for Foundation Excavation Supporting of Neijianglu Station of Shanghai Metro

Neijianglu Station of Shanghai Metro Line 12 is located on the bank of Huangpu River,where the soil strata are essentially soft flowing mucky clay and the groundwater depth is about 1 m.Taking this project as an example,this article elaborates the scheme of structure design in detail,including the establishment of the load-structure model of the composite wall system by using finite element software SAP84,the calculation of internal force by using the fractional superposition method,and the design of the internal support system in which the concrete is combined with steel tube.Now the main structure and three accessory structures of the station have been constructed smoothly,which proves that the scheme of structure design of foundation pit supporting system is reasonable.