LI Xue, WU Jiuqi, GENG Fengjuan, GENG Aopeng, ZHANG Yushen. CALCULATIONS OF LONGITUDINAL DEFORMATION FOR RIVER-CROSSING SHIELD TUNNELS INDUCED BY SCOUR IN DEEP CHANNEL SECTIONS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 6-10,38. doi: 10.13204/j.gyjzG20112306
Citation:
LI Xue, WU Jiuqi, GENG Fengjuan, GENG Aopeng, ZHANG Yushen. CALCULATIONS OF LONGITUDINAL DEFORMATION FOR RIVER-CROSSING SHIELD TUNNELS INDUCED BY SCOUR IN DEEP CHANNEL SECTIONS[J]. INDUSTRIAL CONSTRUCTION , 2021, 51(7): 6-10,38. doi: 10.13204/j.gyjzG20112306
LI Xue, WU Jiuqi, GENG Fengjuan, GENG Aopeng, ZHANG Yushen. CALCULATIONS OF LONGITUDINAL DEFORMATION FOR RIVER-CROSSING SHIELD TUNNELS INDUCED BY SCOUR IN DEEP CHANNEL SECTIONS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 6-10,38. doi: 10.13204/j.gyjzG20112306
Citation:
LI Xue, WU Jiuqi, GENG Fengjuan, GENG Aopeng, ZHANG Yushen. CALCULATIONS OF LONGITUDINAL DEFORMATION FOR RIVER-CROSSING SHIELD TUNNELS INDUCED BY SCOUR IN DEEP CHANNEL SECTIONS[J]. INDUSTRIAL CONSTRUCTION , 2021, 51(7): 6-10,38. doi: 10.13204/j.gyjzG20112306
CALCULATIONS OF LONGITUDINAL DEFORMATION FOR RIVER-CROSSING SHIELD TUNNELS INDUCED BY SCOUR IN DEEP CHANNEL SECTIONS
1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
2. Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Tongji University, Shanghai 201804, China
Received Date: 2020-11-23Available Online:
2021-11-11
Abstract
The scour and deposition in deep channel sections of a river bed make the longitudinal loads acting on river-crossing tunnels complicated and affect the longitudinal deformation of tunnels. Based on the river-crossing tunnel project of Nanjing Metro, the longitudinal deformation properties of the shield tunnel caused by different scoured depth and thalweg locations were studied. Firstly, the finite element model was constructed to obtain the longitudinal deformation of the tunnel in different scoured conditions. According to the deformation curve, the curvature radius of the tunnel and the opening widths between joints were calculated. The results showed that:1) The radius of curvature of the tunnel and the maximum opening widths of segment joints were related to the scoured depth and range. The larger the scoured range, the greater the rebound of the tunnel and the smaller the corresponding curvature radius, the larger the opening between segements. 2) The position of the maximum opening width was near the thalweg. 3) In the vicinity of change point for tunnel slopes, the opening widths of segments were obviously larger than that of constant slope sections. Therefore, the locations of changing slope for tunnels should be away from the zones of depth variation for thalwegs in design.
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Cited by Periodical cited type(1) 1. 陈孝华，何应道，封坤，郭文琦. 河床冲淤作用下公轨合建盾构隧道纵向力学性能研究. 公路. 2023(01): 391-400 .
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