微型钢管桩超前加固在某土钉墙支护工程中的应用

Micro Steel Pipe Piles in Advance Reinforcement in Some Soil Nailing Wall Engineering

土钉墙是应用最广泛的基坑支护方法之一,其经济适用性在很多基坑工程中得到了证明,但是土钉墙支护也有位移偏大、整体刚度差等缺点。在工程实践中,可利用微型桩与土钉墙组成复合支护结构以减少位移同时提高其整体稳定性。本文通过对广州市某采用土钉墙支护的基坑工程出现的问题进行分析,提出增加微型钢管桩进行超前加固的措施,经过理论计算和实践证明其处理效果良好,为同类工程的设计提供了参考。

Soil nailing wall is the most widely used method for foundation pit supporting, the economic applicability in many excavations have been proved, but the soil nailing wall also has some disadvantages like large displacement, stiffness and so on. In engineering practice, the micro pile and soil nailing wall can be composed of composite supporting structure to reduce the displacement and improve its overall stability. Through analyzing problems of the Guangzhou some soil-nailed retaining wall in foundation pit engineering, we put forward to increase micro steel tube pile of advance reinforcement measures, and achieved good results, so this article provide a certain basis for the design of similar projects.