Key Technology of Civil Construction Design of Utility Tunnel through Mountains in Coastal Area
The construction of utility tunnel through mountains in coastal area faces severe challenges in safety and protection of surrounding environment.Taking a tunnel through a mountain as an example,this paper sorts out the major and difficult points in engineering civil construction design,and adopts key design technologies in a targeted way.The open-cut foundation pit at two ports adopts the support method of pile foundation with shotcrete anchor,and the occlusion pile at the seaside can effectively cope with the tidal action.The combined strategy of general section controlled blasting and static blasting in sensitive sections is adopted in tunnel excavation.The actual construction monitoring results show that the influence of civil construction and surrounding residential buildings is within the safe and controllable range,which effectively solves the construction problems of this type of pipe corridor.These key technologies can be used as reference cases for similar projects.
coastal areatunnel through the mountainutility tunnelfoundation pit engineeringstatic blasting
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