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上海浦东国际机场江镇河泵闸软土基坑边坡工程采用旋喷桩支护技术,为泵闸底板、闸墩的施工提供安全、无水的施工条件,实践证明是一种经济有效的施工措施。一、工程概况和地质条件1.工程概况江镇河泵闸工程位于浦东新区江镇河,是浦东国际机场二级排水工程中的主体工程。该工程底板埋置较深,若基坑采用大开挖方式施工,会对机场北端的931大堤的稳定有很大的影响。为避免此影响和减少工程建设征地费,采用边坡支护结构为泵闸施工提供场地。由于场地内存在一层透水性很大的砂质粉土,极易产生流砂或管涌现象,因此,设计支护结构除考虑墙体稳定性外还考虑了防止流砂及管涌。
Pudong International Airport, Shanghai Pudong International Airport Jiang Zhenhe soft soil foundation pit slope engineering using rotary jetting pile support technology for the pump floor, pier construction to provide safe and dry conditions, the practice proved to be a cost-effective Construction measures. I. Project Overview and Geological Conditions 1. Project Overview Jiang Zhenhe Pumping Gate Project is located in Pudong New Area, Jiangzhen River, Pudong International Airport is the second stage of the main drainage works. The engineering floor buried deeper, if the excavation of large excavation of the way, the northern end of the airport will have a great impact on the stability of the 931 embankment. In order to avoid this influence and reduce the land acquisition fee for construction, the slope support structure is adopted to provide the site for pump and dam construction. Due to the existence of a layer of sandy soil with large water permeability, it is very easy to produce runoff or pipe surge. Therefore, the design and support structure is not only considered for the stability of the wall, but also for preventing runoff and piping.