Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (8): 2350-2359.doi: 10.16285/j.rsm.2022.1380

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Soil-water characteristics and hysteresis effects of loess considering deformation

GAO Xu-long1, 2, ZHANG Yu-chuan1, 2, HUANG Hong-wei1, 2, LIU Dong-fa1, 2, LIU Zhi-Fan1, 2   

  1. 1. School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, China; 2. Key Laboratory of Mechanics on Disaster and Environment in Western China of the Ministry of Education, Lanzhou University, Lanzhou, Gansu 730000, China
  • Received:2022-09-06 Accepted:2022-11-28 Online:2023-08-21 Published:2023-08-21
  • Supported by:
    This work was supported by the Department of Housing and Urban-Rural Development of Gansu Province Scientific Research Project (JK2020-16).

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Abstract: A three-dimensional soil-water characteristic surface model considering deformation is established to study the effect of deformation on the soil-water characteristics and the hysteresis effect of unsaturated loess. It is established by first constructing a relationship between water content and pore ratio under constant suction conditions, and then introducing the effect of suction. The model can describe the change of water content with pore ratio and suction during wetting or drying of loess with different initial pore ratios. Wetting and drying tests on loess show that the water content under constant suction conditions is linearly related to the pore ratio, which verified the theoretical assumptions of the model. Additionally, soil-water characteristics of equal pore ratio state can be determined from the model, and by comparing them with the experimental results, it is found that the deformation caused by suction in the drying path has a greater influence on soil-water characteristics, which will reduce the characteristic parameters and suppress the hysteresis effect.

Key words: unsaturated loess, deformation, soil-water characteristic surface, hysteresis effects

CLC Number: 

  • TU 43
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