宜万铁路高阳寨隧道出口段为破碎堆积体，在如此复杂的地形条件下修建双线大跨隧道难度极大，监控量测为快速施工提供了依据和安全保障；介绍了监测实施方案，分析了监测成果，论证了在破碎堆积体中修建双线大跨隧道的可行性。

The exit portion of Gaoyangzai tunnel on Yiwan railway is located in fractured accumulative ground. It is of great difficulty to build largespanned doubletrack railway tunnels under such difficult geological conditions. Monitoring and measurement provide basis and safety guarantees for the rapid construction of the tunnel. The article presents the execution plan of the monitoring and measurement, analyses the monitoring results and expatiates on the feasibility of building largespanned doubletrack tunnel in fractured accumulative ground.