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| EVALUATION OF ROADBED DEFORMATION AND TRANSPORTATION SECURITY OF RAILWAYS ABOVE SALT CAVERN GAS STORAGE GROUP |
| KONG Junfeng1，LI Yinping1，YANG Chunhe1，2，YIN Dongliang3，JING Wenjun1，ZHENG Yun1 |
| (1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering，Ministry of Education，Chongqing University，Chongqing 400044，China；3. Jintan Gas Storage Project Department，Sichuan-to-East Natural Gas Transmission Pipeline Branch Company of SINOPEC，Jintan，Jiangsu 213200，China) |
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Abstract It is a key problem for reducing the width of railway safety belt reasonably according to the evaluation result of railway roadbed subsidence and deformation，which determines the feasibility of Hubei Yunying salt cavern gas storage group. The creep contraction of salt cavern volume during operation period is the main cause of ground subsidence. Based on the hypothesis that the subsidence basin volume approximately has a relation of direct ratio with the creep contraction volume，the ground subsidence curve could be fitted as a Gauss function. Two key parameters of volume transfer coefficient and impact angle were introduced；and the formula for ground subsidence above a single cavern was deduced under condition of a certain volume shrinkage. The formula was used in the ground subsidence prediction of planned Hubei Yunying salt cavern storage. Finally，the ground subsidence above the salt cavern gas storage group was forecasted by superposition method. To solve the conflict of railway safety belt and planned salt cavern site，according to different roadbed deformation standards and salt cavern gas storage group ground subsidence above prediction results，the suggestion of reducing width of railway safety belt is given，as well as the control method to reduce the ground subsidence above salt cavern gas storage group and the roadbed subsidence effect.
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Received: 27 April 2012
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DONG Xuechao1, 2, LU Zheng1, 2, ZHENG Qinggang3, JIANG Fan4, LI Jiahang1, 2, GUO Mingwei1, 2*. Numerical simulation method and application for the entire dynamic sinking process of a deep-water super-large caisson foundation[J]. , 2026, 45(6): 1899-1912. |
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2012, Vol. 31 
