Mechanics in Engineering ›› 2021, Vol. 43 ›› Issue (1): 26-37.DOI: 10.6052/1000-0879-20-323

• Applied Research • Previous Articles     Next Articles


SHI Gang1),*, ZHU Banghua*, ZHANG Yurong   

  1. *School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;
    School of Business, Zhengzhou University, Zhengzhou 450001, China
  • Received:2020-08-07 Revised:2020-09-02 Published:2021-02-23

Abstract: The limitations of the traditional one-dimensional Terzaghi consolidation theory are more and more felt. In this paper, the unified hardening (UH) constitutive model with consideration of the time effect is used, with the Hansbo's flow model coupled with the consolidation equation of the UH constitutive model, and the consolidation equations based on the UH model and the Hansbo's flow model under several typical cyclic loads are established. Numerical analysis is carried out by using the FlexPDE software, and the reliability of the algorithm is verified by comparing the calculation results with those in the literature. On this basis, the seepage consolidation characteristics of the saturated clay under several typical cyclic loads are studied, and the influence of the model parameters on the consolidation characteristics of the saturated clay is analyzed. The results show that: under the cyclic loading, the average consolidation degree and the settlement of the foundation are always in a cyclic state; the influence of the Hansbo's flow model parameters on the average consolidation degree is greater than that of the Darcy's flow parameters, and the secondary consolidation coefficient in the UH model has a greater influence on the consolidation process. In addition, the influence of the Hansbo's flow parameters and the soil rebound index and permeability index on the consolidation process is mainly reflected in the middle stage, and the later stage of the consolidation process will be in a stable circulation state.

Key words: soft clay, cyclic loading, Hansbo's flow, unified hardening model

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