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Software development for simulating and predicting deep foundation pit dewatering and land subsidence |
1.School of Earth Science and Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2.Jiangsu Nanjing Institute of GeoEngineering Investigation, Nanjing, Jiangsu 210012, China |
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Abstract Based on Terzaghi consolidation theory, a three dimensional full coupling model between deep foundation pit dewatering and land subsidence was established. The computer program of calculating process was compiled by FORTRAN95 language, and the visualization operational software was established by VB 6.0 to predict and simulate deep foundation pit dewatering and land subsidence. With graphical interface mode, the relationship between deep foundation pit dewatering and land subsidence was simulated and expressed to propose an optimal plan of dewatering. Taking deep foundation pit dewatering of Liuzhou East Road Station of Nanjing Metro Line3 as example, the software was used to simulate the deep foundation pit dewatering. The results show that an optimal project is obtained by adopting 15 dewatering wells for 10 days, and the water table of pit is maintained 1.0 m below the floor with depth of 20.8 m. After 66 days later, the land subsidence is less than 0.015 m at 100.0 m away from the pit, which meets the control requirements of settlement.
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Received: 17 September 2015
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