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Overall Design and Key Technologies of Nanjing Jianning West Road Rivercrossing Tunnel Project
(1 .The Second Highway Survey, Design and Research Institute, China Communications, Wuhan 430056;
2. Zhongtian Transportation Construction Investment Group Co. Ltd.，China Communications, Xiangyang 441002)
Abstract Nanjing Jianning West Road is located in the city′s core area, and the cross-river section adopts a twinbore six-lane large-diameter shield tunnel.The paper expounds the control factors and construction conditions of
the project, and introduces the overall design scheme of the tunnel from the aspects of plane, longitudinal section and cross section. By using theoretical analysis, numerical methods and engineering analogy,the key technologies of design and construction for shield tunnelling through the anti-slip group piles of the Changjiang dyke, the long distance crossing through the mixed stratum of soft and hard rock, the shallow covering of fine sand and the tunnelling close to the existing structures are systematically studied, and the optimized final design option is proposed so that the overall function and safety of construction and operation can be best achieved.
Abstract：
Nanjing Jianning West Road is located in the city′s core area, and the cross-river section adopts a twinbore six-lane large-diameter shield tunnel.The paper expounds the control factors and construction conditions of
the project, and introduces the overall design scheme of the tunnel from the aspects of plane, longitudinal section and cross section. By using theoretical analysis, numerical methods and engineering analogy,the key technologies of design and construction for shield tunnelling through the anti-slip group piles of the Changjiang dyke, the long distance crossing through the mixed stratum of soft and hard rock, the shallow covering of fine sand and the tunnelling close to the existing structures are systematically studied, and the optimized final design option is proposed so that the overall function and safety of construction and operation can be best achieved.
WEI Longhai1 WANG Miao2 WU Shuyuan1
.Overall Design and Key Technologies of Nanjing Jianning West Road Rivercrossing Tunnel Project[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(5): 228-236
2022, Vol. 59 