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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.
Taking Jianfengling Tunnel as a typical example, according to the results of geological survey, a typical measuring hole with typical cross-section layout is selected for monitoring.According to the monitoring data, it is proposed that slope stability will be affected with the tunnel excavation, The water condition is the main factor that affects the stability of the slope and the slope prevention and control measures should be strengthened. The midmas-gts software is used to simulate the tunnel excavation process and the variation of displacement and strain caused by tunnel excavation is analyzed. The results show that: The change of displacement and the change of strain after digging are obviously larger than that of the un-excavated ones. The tunnel mouth section is one of the main sections that cause the collapse and fracture. Therefore, the stability of the slope at the mouth section must be carefully considered in the design and construction of the tunnel And treat the problem.