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Land subsidence caused by internal soil erosion owing to pumping confined aquifer groundwater during the deep foundation construction in Shanghai |
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| Authors: | X-S Zhang J-X Wang H Wong C-J Leo Q Liu Y-Q Tang X-L Yan W-H Sun Z-Q Huang X-H Hao |
| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai, 200092, China 2. Institute of Resources and Environment, North China Institute of Water Resources and Electric Power, Zhengzhou, 450011, China 3. Département Génie Civil et Batiment, Ecole Nationale des Travaux Publics de l’Etat, Université de Lyon, CNRS, FRE 3237, rue Maurice Audin, 69120, Vaulx-en-Velin, France 4. School of Engineering, University of Western Sydney, Locked Bag 1797, Penrith, NSW, 2751, Australia 5. School of Highway, Chang’an University, Middle Section of Nan-er-huan Road, Xi’an, 710064, China |
| Abstract: | Land subsidence is presented in many factors in different areas with urbanization. Internal soil erosion, owing to pumping confined groundwater during the deep foundation pit construction, has contributed to land subsidence. Four governing equations are presented to describe the process of internal soil erosion based on the mathematical–physical model. The finite element computation results, based on practical deep foundation pit engineering consisted of 8 layers of soil of Shanghai area, demonstrate that internal soil erosion will cause the increment of land subsidence and deformation and is related to the hydraulic gradient and the characters of the soils. |
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