PHC管桩结合被动区加固在闽南深厚软土基坑中的应用

PHC Pile combined with Passive Zone strengthen in Deep Soft Soil Foundation Pit in Southern Fujian

本文通过基坑实例,分析了PHC管桩在闽南深厚软土基坑中的应用。基坑深度6m,淤泥厚度达16.5m时,淤泥平均含水量达69%时,采用PHC管桩加锚杆结合被动区加固的支护方式,是可行的。既能保证基坑安全,又能降低造价、节约工期。本文提出了PHC管桩作为围护桩的设计计算控制标准,及设计、施工、监测的要点及注意事项。

Through a pit example, the application of the PHC pile in the deep soft soil foundation pit in southern Fujian. Pit depth is 6m, silt thickness is up to 16.5m, silt average moisture content is 69%, the use of the PHC pile Anchor combined with passive zone reinforcement support is feasible. This method will ensure the pit safety, as well as lower cost, save the construction time. In this paper, the PHC pile design control standards, and points of design, construction, monitoring and precautions were mentioned.