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    Chinasfirstunderseashieldtunnelconstructionandtechnologicalacevementsreacheheintertioladvanc

    文章来源:黄翠东 时间:2020-03-09

      Chinas first undersea shield tunnel construction and technological achievements reached the international advanced level Chinese Academy of Engineering Qian Qihu on behalf of the Group of Experts on the 1st "Key Construction Technology Research and Application subway undersea tunnel complex environment geological conditions Xiamen waters," science and technology achievement appraisal meeting held in Xiamen, said Xiamen Metro Line 2 tunnel through the sea comprehensive integration innovative research has reached the international advanced level, for the Channel tunnel construction in China has accumulated valuable experience in the future, to make major technical reserves.Xiamen Metro Line 2 Cross Harbor Tunnel is Chinas first cross-harbor Metro Shield Tunnel.Shield segment 2784 m total length, two-hole wire, using two composite slurry shield machine construction, the diameter of shield 7.043 meters.February 2016 shield tunneling machine origin, March 2020 through two-lane tunnel.Line 2 is the longest and most difficult of key control project.Xiamen Metro Line 2 through sea tunnel construction site.Liu Fuchang photo Central Railway 14th Bureau Group Co., construction technology research and shield tunnel under the seabed "Sea complex environmental and geological conditions of China Railway 14th Bureau Group Co., Ltd. Grand Shield Engineering, Southwest Jiaotong University, China Ocean University and other units completed application of "project outcomes, including complete sets of equipment adaptively configured shield technology, site-sea boulders blasting technology, static blasting shield machine with pressure, hydraulic sawing, boulders comprehensive approach positions within hydraulic fracturing, etc., high frequency band Jincang pressure safety control technology, undersea tunnel connecting passage to freeze construction technology.Xiamen Metro Line 2 through sea tunnel construction site.Liu Fuchang Photo Railway 14th big shield project leader Wang Xiaoqiong introduction, Xiamen undersea tunnel project through the stratum set of soft soil, hard rock, soft down hard, and Soft, arch intrusion of sand, two fault zones, etc. , known as the "geological Museum", rock nearly 200 MPa maximum strength, tunnels Futuhoudu 8.7-65.7 m range, maximum pressure 6 times atmospheric pressure, difficult, high risk.During shield tunneling machine seabed, with total pressure Jincang 3475 cartridge, manual cleaning boulders more than 1000 m3, sea blasting boulder 2520 m3, the seabed soil reinforcement broken stratum 64,916 m3, the seabed 712 with pressure ATC in order to cross the submarine subway 3 minutes with a time of 4 years finally dig through the tunnel, which is rare in the history of tunnel construction in China.Xiamen Metro Line 2 construction site through sea tunnel, encountered stone.Liu Fuchang taken Experts believe that the implementation of this countrys first cross-shield tunnel project, to achieve the first time at sea boulders and bedrock are embossed, the first time the seabed freezing construction, the first domestic use of the slurry shield Heng shield mud packing and other six construction technology innovation, provide valuable practical experience for the future construction of similar projects.

    Chinas first undersea shield tunnel construction and technological achievements reached the international advanced level

    Chinas first undersea shield tunnel construction and technological achievements reached the international advanced level

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