Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (8): 2583-2591.doi: 10.16285/j.rsm.2018.2047

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Semi-analytical solutions for one-dimensional nonlinear large strain consolidation of structured soft clay

HU An-feng1, 2, ZHOU Yu-shan1, 2, 3, CHEN Yuan1, 2, XIA Chang-qing1, 2, XIE Kang-he1, 2   

  1. 1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China; 2. Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou, Zhejiang 310058, China; 3. The Architectural Design and Research Institute of Zhejiang University Co., Ltd., Hangzhou, Zhejiang 310028, China
  • Received:2018-11-07 Revised:2019-11-15 Online:2020-08-14 Published:2020-10-17
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51778572, 51978612).

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Abstract: In the analysis of consolidation of naturally saturated soft clay with strong structure, the influence of sedimentation on self-weight stress, the nonlinear variation of compressibility and permeability were considered. The one-dimensional large strain consolidation equations under arbitrary loading conditions were derived and solved by a semi-analytical method. Then the solutions were degraded into solutions of a non-structured saturated soft clay consolidation theory. By comparing the degraded semi-analytical solutions with the existing large strain consolidation solutions, the solutions of the one-dimensional large strain consolidation equations were proved to be right. At last, the consolidation behaviours of semi-analytical solutions were compared with the theoretical solutions of small strain consolidation theory and the the theoretical solution of the consolidation theory without considering the structure. The comparison results show that the settlement at any time of large strain consolidation theory is greater than that of the small strain consolidation theory, and the difference between the two increases with the increase of the load. When considering the structure of the soft soil, the settlement of large strain consolidation is smaller than the calculated value without considering the soil structure.

Key words: structured soil, large strain, nonlinear consolidation, semi-analytical solutions

CLC Number: 

  • TU 433
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