大断面黄土隧道初支作用机理及变形控制技术研究

Study on Primary Support Mechanism and Deformation Control Technology of the Loess Tunnel with Large Sections

通过对已建设完成的黄土隧道工程的数据统计,利用计算机技术进行数值模拟计算,对大断面黄土隧道断面的力学特性和初支机理进行研究分析,同时根据初支机理,依托郑西线黄土隧道工程对大断面黄土隧道的沉降变形特性、影响因素进行系统深入的研究,并通过实践证明得到沉降变形的关键控制技术。

Through data statistics of the completed construction in loess tunnel engineering, we use computer technology for numerical simulation,and study the mechanical properties of the big cross section of loess tunnel profile and the primary support mechanism. According to the primary support mechanism, relying on research of deformation characteristics, and influencing factors of the loess tunnel with large cross sections in Zheng-Xi engineering, the paper finds the key to the settlement control technology through practice.