Journal of Shandong University(Engineering Science) ›› 2025, Vol. 55 ›› Issue (4): 118-126.doi: 10.6040/j.issn.1672-3961.0.2025.046

• Civil Engineering • Previous Articles    

Experimental study on deformation characteristics of soil-structure interface under seepage conditions

LI Guang1, LIU Jian2, ZHOU Lizhi2, LI Xiaohan2, LÜ Gaohang2, XIE Quanyi2*   

  1. LI Guang1, LIU Jian2, ZHOU Lizhi2, LI Xiaohan2, LÜ
    Gaohang2, XIE Quanyi2*(1. Haihe River, Huaihe River and Xiaoqinghe River Basin Water Conservancy Management and Service Center of Shandong Province, Jinan 250014, Shandong, China;
    2. School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China
  • Published:2025-08-31

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Abstract: In order to solve the problem that it was difficult to determine the deformation condition of the soil-structure interface under seepage, an experimental device for studying seepage-induced deformation at this interface was designed. This study investigated the distribution characteristics of interface deformation, soil surface deformation, and internal soil deformation, as well as their evolution with increasing hydraulic gradient under seepage action. The influence mechanism of different interface types and soil types on interface seepage failure was analyzed. The main conclusions were as follows:(1)the horizontal deformation of the contact surface was symmetrical in the test, the internal deformation of soil in the direction perpendicular to the contact surface showed a nonlinear decreasing trend with the increase of distance;(2)The seepage failure process of soil structure interface could be divided into three stages, stability, transition and failure, the deformation of the contact surface and the permeability coefficient of the contact surface showed the trend of linear increase, nonlinear increase and sharp increase in the three stages respectively;(3)The strains at the sand-structure interface were generally about 9.0%, strains at the silt-structure interface ranged from 7.9% to 9.1%, while strains at the low-liquid-limit clay-structure interface ranged from 5.2% to 6.5%.

Key words: seepage, soil-structure contact surface, deformation, evolution law, hydraulic gradient

CLC Number: 

  • TU43
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