软土深基坑中双排桩临时支护与永久结构结合的应用与探讨

摘要

During water conservancy construction, due to the influence of surrounding buildings, there is no condition to form a foundation pit by large-scale excavation, so the temporary supporting structure is used in this case.Usually the temporary support-ing structure will lose its function when the main project is completed.Through an engineering case of deep soft clay foundation sluice in Guangdong Province, which supporting the temporary foundation pit by double-row piles structure, and also use the doub-le-row pile structure as the foundation of the upstream and downstream wing wall to explore the application experience of combine with double-row piles temporary support structure and permanent structure.Practice has proved that, the calculation model result closer by the measured result, it has reference value for similar project.%水利工程施工中，由于周边建筑物影响，没有场地条件进行自然放坡开挖需要临时支护结构来形成基坑，基坑的临时支护，一般在主体工程完工后，就已完成其功能使命，失去效用。该文以广东某深厚软基水闸工程为例，施工期利用双排桩进行水闸基坑支护，运行期继续作为上下游连接段翼墙的基础部分发挥效用，探讨双排桩临时支护与永久结构相结合的应用经验。实践证明，计算模型结果与实测结果较接近，对类似工程有一定的参考价值。