软弱围岩浅埋大断面隧道下穿村庄施工控制技术

Construction Control Technology of Shallow Buried Tunnel with Weak Surrounding Rock and Large Section Under-passing the Village

通过分析爆破振动速度测试、地表量测、地表裂缝的产生机制及发展规律以及施工控制及防治技术,指导和组织娄邵铁路扩能改造工程金石冲隧道在浅埋软弱地层中下穿村庄施工。通过优化爆破施工参数设计、加强支护措施,施工过程中及时变换施工方法和处理方案,以适应动态设计、动态施工、动态管理,并在施工过程中加强超前地质预报和监控量测工作,大力推行信息化施工技术,总结形成软弱围岩条件下大断面浅埋隧道施工综合控制技术,可为以后的隧道建设施工提供借鉴。

In the paper, the blasting vibration velocity test, ground surface measurement, the formation and development mechanism referring surface cracks, construction control, as well as prevention technology were studied. The guidance and organization to the Loudi-Shaoyang Railway reconstruction project concerning the shallow buried and large section Jinshich- ong Tunnel with weak surrounding rock beneath the village were carried out. The paper optimized the parameters design of blasting construction and strengthened the supporting measures, coupled with flexible and changeable construction and treatment methods during construction, so as to adapt dynamic design, dynamic construction and dynamic management. A- part from that, it was contributed by strengthening advanced geological forecasting, enhancing monitoring and measurement work, as well as vigorously promoting the information construction technology in the construction process, the integrated construction control technology of shallow buried and large section tunnel with weak surrounding rock could be summed up, which would bear certain significance for the reference of tunnel construction in the future.