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Impact of highrise building load on land subsidence in Nantong |
| 1. School of Earth Science and Engineering, Hohai University, Nanjing, Jiangsu 211100, China; 2. Bureau of Geology Mineral Resources Prospecting of Jiangsu Province, Nanjing, Jiangsu 210018, China; 3. Jiangsu Nanjing Institute of Geoengineering Investigation, Nanjing, Jiangsu 210041, China |
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Abstract Aiming at the land subsidence of Quaternary loose sediment layer regions in the Yangtze River caused by highrise building load, based on Biot′s consolidation theory and combined with nonlinear rheological theory of soil, the constitutive relation was extended to viscoelastic plasticity, and the dynamic change relationship of mechanical parameters and hydraulic parameters were also considered. The threedimensional full coupling mathematic model of Nantong among highrise building load, groundwater seepage and deformation of soil settlement was established. Based on identification and verification of the model and with the condition that the exploitation of groundwater in the study area was stopped and existed highrise building load only, the characteristics of each aquifer groundwater flow field and developing tendency of land subsidence were predicted from the end of December 2010 to the end of December 2025. The results show that the maximum land subsidence in Nantong Chongchuan District is 5528 mm with the maximum land subsidence rate of 369 mm·a-1．The maximum land subsidence in Tongzhou urban area is 3887 mm with the maximum land subsidence rate of 259 mm·a-1, and the large land subsidence areas locate in highrise building dense areas.
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2017, Vol. 38 
