超小净距浅埋暗挖法综合管廊设计措施研究

Study on Design Measures for Utility Tunnel by Ultra-small Clear-distance Shallow Buried-tunneling Method

以深圳地区某超小净距浅埋暗挖法施工的管廊项目为依托,建立三维数值力学模型,研究不同控制条件下土体与结构的变形和稳定性,探讨浅埋暗挖法近接工况下的关键设计施工措施。其内容主要包括地下水控制、地层预加固技术、超前管棚预支护和正台阶分部开挖工法等。

Relying on a utility tunnel project constructed by the ultra-small clear distance shallow buried-tunneling method in Shenzhen,a three-dimensional numerical mechanical model is established to study the deformation and stability of soil body and structure under the different control conditions,and to explore the key design and construction measures of shallow buried-tunneling method under the close working conditions.Its contents mainly include the methods of groundwater control,stratum pre-reinforcement technology,advance pipe shed pre-support and excavation by steps.