深基坑桩锚支护土拱效应及稳定性分析

摘要

Studying on the central commercial plaza in Zhuzhou city. The article adopts the retaining scheme of manual digging bored piles with two prestressed anchors for the deep foundation pit, and three dimensional numerical simulation was carried out by FLAC3D for deep foundation pit, the forming mechanism of arching effect between adjacent piles was analyzed, the horizontal displacement of retaining structure and variation of soil arching effect between adjacent piles in the process of excavation were further studied, so it provides reference to similar retaining design.%以株洲市中央商业广场深基坑为研究对象，采用人工挖孔灌注桩加两道预应力锚杆支护方案，利用FLAC3D对深基坑开挖过程进行三维数值模拟，分析了桩间土拱效应形成机理，并对该基坑开挖过程中支护结构的变形和桩间土拱效应随开挖深度的变化规律进行了研究，为类似基坑工程的支护设计提供参考。