某桩锚支护基坑的设计计算及监测

Design,Calculation and Monitoring of Deep Foundation Pit with Pile-Anchor Retaining Structure

某大型基坑工程位于广州市珠江新城CBD核心区,具有基坑开挖深度大、土层情况差以及周边环境复杂等特点。介绍了该深基坑工程的概况以及设计方案,并对其中采用人工挖孔桩+预应力锚杆支护的A-A区段进行了有限元分析,同时与设计计算结果以及现场实测结果进行对比,验证了设计方案的合理性及可靠性,为同类工程提供参考。

The deep foundation pit was located in the CBD region in Zhujiang Newtown in Guangzhou,which had the following characteristics,the high excavation depth,the poor property of soil and the complex around environment.The general situation and design of this deep foundation pit was introduced,which included two support structures：the manual hole digging pile and prestressed anchor retaining structure and the manual hole digging pile and concrete internal bracing support structure,and the Finite element method analysis was used to calculate the effect of manual hole digging pile and prestressed anchor retaining structure.The rationality and reliability of design was verified by the comparison between FEM analysis data and monitoring data.