|Table of Contents|

Triaxial shear test and constitutive model of saturated frozen soil-steel interface(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年06期
Page:
199-210
Research Field:
岩土工程
Publishing date:

Info

Title:
Triaxial shear test and constitutive model of saturated frozen soil-steel interface
Author(s):
DONG Xuguang;  WANG Zhenbo;  LYU Jiangfei;  TANG Shaorong
(School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, Ningxia, China)
Keywords:
frozen soil-steel interface;  binary media model;  triaxial shear test;  roughness;  constitutive model
PACS:
TU445
DOI:
10.19815/j.jace.2025.03091
Abstract:
In order to reveal the mechanical characteristics and underlying influencing mechanisms of the frozen soil-structure interface under three-dimensional stress states. Cylindrical specimens were prepared by combining preformed steel blocks with an inclined plane and saturated soil. Using a temperature-controlled triaxial apparatus, specimens were subjected to various stress path loading tests. The influence mechanisms of interface roughness, temperature, and confining pressure on the interfacial shear mechanical properties were investigated. The validity of the model was verified by comparing the experimental stress-displacement curve with the constitutive model of saturated frozen soil-steel interface considering the influence of roughness. The results show that shear failure primarily occurs at the interface, and the shear stress-shear displacement curve exhibits strain softening characteristics. The shear strength of the interface increases linearly with both roughness and temperature. The effect of temperature on peak strength is significantly greater than that of residual strength. When the temperature ranges from -2 ℃ to -5 ℃, the influence of roughness on residual strength becomes pronounced, where higher roughness corresponds to greater residual strength. When the temperature ranges from -8 ℃ to -11 ℃, the influence of roughness on residual strength diminishes. The findings can provide valuable reference for engineering projects involving soil-structure interaction in frozen soil regions, such as pile foundations and anchor systems.

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Last Update: 2025-11-25