Abstract: Recently, as the construction of Chinese traffic infrastructure is expanding step by step, there are more and more tunnels of highway, in which there are some over length tunnels. The Hei Shiling tunnel, of Zhang-Shi Highway in Hebei Province, is 7590m long. It is constructed in New Austrian Tunneling Method (NATM). It is an one-way and double lane tunnel with disjunctive up and down lines. It is a long and large rocked tunnel. The grades of surrounding rock mainly are grade III, grade IV and grade V. In this paper, the Three-Dimensional Numerical Simulation of GTS method is adopted to dynamic analysis about the stability of construction when the tunnel is over the faultage. By the study, after the tunnel is timbered as the original designation, the plastic scope of the surrounding rock’s distortion is controlled obviously, and the stability of surrounding rock is strengthened. This research not only has instruction function to actual construction, but also saves investment and improves economic efficiency

Key words: tunnel of highway, numerical simulation, faultage, analysis of stability

摘要： 近年来，随着我国交通基础设施建设规模的逐步扩大，公路隧道修建的数量也日益增多，其中不乏有一些超长隧道。按“新奥法”施工的河北张石高速黑石岭隧道全长7 590m，为上、下行分离的双洞单行双车道，属于长大岩石高速公路隧道，围岩级别主要为III、IV、V三级。本文采用GTS三维数值模拟方法，对张石高速黑石岭隧道在穿越断层时的施工稳定性进行了动态分析研究。通过研究认为，隧道按原设计方案支护后，围岩的变形及塑性区范围得到明显控制，增强了长子面围岩的稳定性。该研究不仅对实际施工具有一定的指导作用，而且可以节约投资，增加经济效益。

关键词: 公路隧道, 数值模拟, 断层, 稳定性分析