南昌商业中心深基坑工程组合支护技术

Composite support for the deep foundation pit of a commercial center in Nanchang

摘要:

以南昌市一商业中心深基坑支护工程实例为背景，通过分析周边环境、地质条件、开挖深度,在保证安全的前提下，充分利用各种因素降低基坑支护造价。在地下水控制上，合理确定坑外地下水位控制标高，采用截水、降水的组合形式。基坑支护采用组合支护结构，在不同部位分别采用土钉墙、锚拉式排桩的支护形式；支护结构上，下部采用不同结构类型的组合。通过设计方案比较与优化，做到安全适用、经济合理。

Abstract:

Taking the deep foundation pit support project of a commercial center in Nanchang as an example, on the premise of ensuring safety, various factors were taken into account to reduce the cost of foundation pit support through analysis of the surrounding environment, geological conditions and excavation depth. In the control of groundwater, water cutting-off was combined with dewatering to control the water table outside the pit at the properly designed elevation. The composite support structure was adopted for foundation pit support with the soil nailing wall and tensional anchor piles used for different parts. Various design alternatives were compared and optimized to attain safety, applicability and proper economics.