Research Status of Green Tunnel Construction and Maintenance Technology
With the steady advancement of the national strategy'dual-carbon',the concept of green development has become more deeply rooted in people's minds.As an important infrastructure for enhancing the efficiency of transportation and the level of service,green tunnel is receiving more attention.The national policy requirements related to green transportation and the research of green tunnel technology are analyzed.The connotation and extension of green tunnels are analyzed from the perspectives of green concept,ecological environmental protection,intensive and economical use of resources,energy saving,carbon reduction and emission reduction,comfort and convenience,intelligence and efficiency,etc.The definition of green tunnels is given.Based on the technology characteristics of green tunnels during construction and maintenance periods,the relevant research and development status are sorted out and summarized such as prefabricated assembly technology,ground-source heat pump technology,low-carbon concrete material invention,environmentally friendly tunnel routing,green design of tunnel entrances and gates,construction wastewater treatment technology,reuse of cave slag,invention of low resilient shotcrete material,energy-saving technology for lighting,energy-saving technology for ventilation,active and passive noise reduction measures,intelligent inspection system for operating tunnels,and automated detection of diseases and accurate identification technology.Considering the shortcomings and development trend of tunnel greening technology comprehensively,the future development of green tunnels is elaborated from the aspects of standardized tunnel construction complete sets of technology,engineering application of low-carbon structural materials,whole life cycle tunnel information modeling technology,evaluation of negative ecological effect and ecological environmental protection and restoration,resourceful use of waste and harmless discharge,intelligent control machine of electromechanical system using green auxiliary technology,intelligent equipment,etc.The study can provide certain reference for the green transformation of tunnels.
tunnel engineeringgreen technologyreviewecological and environmental protectionenergy saving and low carbonresource conservation
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