Deformation Analysis and Prevention Measures of Shallow Buried and Hidden Tunnel in Strongly Weathered Soft Rock

随着交通基础设施建设的推进，强风化软岩浅埋隧道应用增多，但因其特殊地质条件与施工环境，易出现变形问题，影响施工安全与运营稳定。本文通过对玉龙隧道这一典型工程实例的分析，总结了强风化软岩浅埋隧道围岩变形的原因。为此，提出了超前支护、加强初期支护、优化施工方法、等防治措施。研究成果为类似工程的设计和施工提供了重要参考，同时也为后续深入研究强风化软岩浅埋隧道变形机理与防治技术奠定了基础。With the development of transportation infrastructure construction, the application of shallow buried tunnel with strong weathering soft rock is increasing, but due to its special geological conditions and construction environment, deformation problems are easy to occur, affecting the construction safety and operation stability. Based on the analysis of Yulong Tunnel, a typical engineering example, combined with the field monitoring data, this paper deeply analyzes the causes of the deformation of the surrounding rock of the shallow buried tunnel with strong weathering soft rock. It is found that the characteristics of surrounding rock, tunnel depth, construction method are the main factors leading to deformation. To this end, the prevention and control measures such as advance support, strengthening initial support, optimizing construction methods, controlling groundwater and strengthening monitoring and feedback are put forward. Practice has proved that these measures can effectively control tunnel deformation and ensure construction safety and engineering qualitys.