发达隧道施工阶段大变形监测及补强方案介绍

广西百色至罗村口高速公路发达隧道因地形、地质、水文条件的影响，隧身结构受到浅埋、偏压、滑坡、地下水等不良地质的综合作用，开工前设计补充技术措施，掘进后对地表、洞身结构跟踪监测，积累了完整翔实的第一手资料，掘进100多米后，考虑山体、地表、洞身严重变形等情况，再次采取补强措施，使隧身变形情况得到控制，保证了结构质量和工程的顺利开展。可为同类地形、地质条件的隧道选址、设计、施工提供参考。

Large Deformation Detection and Reinforcement Scheme of Fada Tunnel in Construction Stage

Because of the impact of terrain, geology and hydrological condition on Fada tunnel in Guangxi provincial Baise-Luocunkou expressway, the tunnel structure bears the synthetical effect of defective geological condition such as shallow burying, eccentric compression, landslide, groundwater, and so on. By designing supplementary technical measures before the starting of construction and tracking detecting ground surface and cave body of tunnel structure, the full and accurate first-hand data is accumulated. After more than 100 meters tunneling is completed, considering the severe distortion of mountain body, ground surface and cave body, reinforcing measures is adopted again, thereby the deformation of tunnel body is controlled, and the structural safety and normal process of engineering are guaranteed. The practice can provide references for site selection, design and construction of tunnels in homogeneous terrain and geology condition.