Thermal and settlement analyses under a riverbank over permafrost |
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| Institution: | 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;2. Gansu Provincial Transportation Research Institute Co., Ltd, Lanzhou, Gansu 730000, China;3. Guangdong Provincial ChangDa Highway Engineering Co., Ltd, Guangzhou, Guangdong 510000, China;1. School of Highway, Chang''an University, Xi''an, Shaanxi 710064, China;2. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;3. CCCC First highway Consultants CO.Ltd, Xi''an, Shaanxi 710075, China;1. College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China;2. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;3. South China Institution of Geotechnical Engineering, South China University of Technology, Guangzhou 510640, China;1. Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing, China;2. Qinghai Research and Observation Base, Key Laboratory of Highway Construction & Maintenance Technology in Permafrost Regions, Ministry of Transport, Xining, Qinghai, China |
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| Abstract: | Thermal regime evolution and settlement behavior of a riverbank over ice-rich permafrost in 20 years were estimated by numerical simulation and layerwise summation calculation. The results show that the permafrost under the riverbank will undergo a thawing process at a dramatically rate under the conditions of practical geology and construction structure, which is responsible for a remarkable settlement. The cases on different conditions of concrete hydration, backfilled soil temperature, seepage and mean annual ground temperature were also discussed, suggesting that these factors have the capability in improving the riverbank performance, among them seepage may be of the most importance. |
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| Keywords: | Riverbank Permafrost region Thermal stability Thaw settlement Numerical simulation Layerwise summation method |
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