【摘要】 以尖峰岭隧道作为典型工程实例,根据地质勘查成果选择典型断面布置合理的测孔进行监测.通过对监测数据进行分析,提出随着隧道的开挖,边坡稳定性一定会受到影响,边坡含水状态是影响其稳定性的主要因素,要加强边坡防治措施.利用midmas-gts软件对隧道开挖过程进行数值模拟,分析了隧道开挖导致的位移和应变的变化规律,结果表明:开挖后的位移变化和应变变化比未开挖时要显著增大,隧道洞口段是引起崩塌、裂缝破坏的主要地段之一,故洞口段边坡的稳定性是隧道设计和施工时必须认真考虑和对待的问题.更多还原

【Abstract】 This study took Jiafengling tunnel as the typical study case.According to the geological exploration results,this paper chose the typical sections to layout the rational measuring holes for monitoring.The monitoring data were analyzed and put forward that the slope stability was affected with the tunnel excavation and the slope water state is the main factors of the slope stability.Numerical simulation for tunnel excavation was carried out by using MIDAS-GTS software,the tunnel excavation in displacement and strain change rules was analyzed,and the result shows that the excavation of the displacement and strain change is significantly more than that of not excavation,and tunnel portal section is the most important one of the area of collapse and crack failure,therefore,the tunnel portal stability is the critical problem in tunnel design and construction.更多还原