基坑工程中双排桩支护结构的应用分析

Application Analysis of Retaining Structure with Double-row Piles in Excavation Engineering

应用ABAQUS有限元分析软件对影响双排桩支护效果的关键因素进行了数值分析,研究了排距、连梁刚度和被动区土体加固对双排桩影响的规律,结合工程实例,将理论计算结果与实测资料对比分析。结果表明,增大排距、提高连梁刚度和加固被动区土体能有效改善双排桩支护效果,进一步揭示了开挖深度与适宜排距的关系,为双排桩设计施工提供参考。

With the numerical method,the key factors such as top-beam stiffness and the distance between rows of piles which influence the effect of the double-row pile retaining structure are analyzed,and the rules of how these factors work are studied.Base on a case study,the data of theoretical calculation are compared with the measured one.The results show that increasing the distance between rows,strengthening the top-beam stiffness and reinforcing the passive zone soil can effectively improve the effect of the double-row piles retaining structure.The relationship been cutting depth and suitable distance been rows has been revealed which can be used for the optimum design reference.