特大断面浅埋隧道围岩变形控制技术研究

Research on Surrounding Rock Deformation Control Technology for Shallow Tunnel with Extra Large Section

摘要: 贵州省贵安新区腾讯七星数据中心隧道群属特大断面隧道，施工和变形控制难度最大，需进行支护方案优化，控制围岩变形，确保开挖安全。本文通过岩石力学实验、支护设计、变形监测等手段验证了浅埋隧道支护设计合理性。由研究可知：通过监测数据可知，岩石的两侧收敛位移较小，拱顶沉降位移较大，浅埋隧道应着重满足竖直方向受力要求，施工过程中，应重点关注拱顶变形。同时，通过该研究也为同类型工程施工提供了借鉴。

Abstract: The Tencent Seven Star Data Center Tunnel Group in Guizhou’s Gui’an New District is a large-section tunnel. The construction and deformation control is the most difficult. It is necessary to optimize the support scheme to control the surrounding rock deformation and ensure the safety of excavation. In this paper, the rationality of shallow tunnel support design is verified by rock mechanics experiment, support design and deformation monitoring. It can be known from the research that through the monitoring data, the convergence displacement of the rock is small, the settlement displacement of the arch is large, and the shallow tunnel should focus on the vertical direction. During the construction process, the dome deformation should be paid attention to. At the same time, through this research, it also provides reference for the same type of engineering construction.