深厚软土地区深基坑支护优化设计与分析

Optimized design of supporting for deep foundation pit located in deep soft soil

沙井泵站基坑位于深厚软土地区,淤泥层厚,开挖深度大。通过用加虚拟拉力的方法对基坑原支护方案进行模拟计算,认为原方案中局部支护桩的位移和弯矩不能满足规范要求,为此对支护方案设计提出优化建议。将现场施工监测数据与该基坑的计算数据进行对比分析,证明优化后方案的合理性。

The foundation pit of Shajing pumping station, which is with a deep silt layer and deep excavation, locates in the deep thick soft ground area and. The simulated calculation for the support scheme by adding virtual tension indicates that the internal stress bending moment can＇ t meet the requirement for the retaining pile of deep foundation pit stipulated in the code. So, we propose an optimized scheme for the foundation pit. By the comparative analysis of the site construction monitoring data and the calculation data, we prove the reasonableness of optimized program