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| Analysis on hyperbolic model and exponential model for post-construction settlement of soft soil |
1. Department of Civil Engineering, Shaoxing College of Art and Science, Shaoxing, Zhejiang 312000, China; 2. Research Institute of Geotechnical Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 3. Research Institute of Geoteehnieal Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, China）
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Abstract Typical prediction models of the post-construction settlement and their deficiencies are analyzed. Exponential settlement model is used on the basis of one-dimension Terzaghi consolidation theory ; but field engineering can not satisfy the theory＇s postulates. So hyperbolic model and exponential model have considerable predicting errors. Mathematic proof shows that the value of exponential model is greater than the corresponding value of hyperbolic model under the conditions of the same initial settlement rates and the same final settlements. The mathematical conclusion is confirmed by the settlement predictions of one case history. Finally, mathematical property of ideal post-construction settlement model is discussed.
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2008, Vol. 29 
