Experimental Study on Shear Mechanical Properties of Pile–Soil Interface Under Freezing Conditions
Source abstract
Abstract
In order to explore the rules for the variation in the adfreeze shear strength at the interface between frozen soil and a pile foundation, and their influencing factors, a measuring system was developed to estimate the freezing strength at the interface by utilizing a pile-pressing method under a cryogenic environment. Experimental results demonstrate that the maximum vertical pressure on the pile top increased significantly with the decrease in temperature under the same moisture content. The shear stress–shear displacement curves, at the bottom part of the interface, presented strain-softening characteristics, while the strain-hardening phenomenon was observed at the upper part of the interface. The strength parameters of the interface decreased with the increase in the pile depth. Moreover, the influence of temperature on the shear strength of the interface was more significant compared with that of the moisture content. The research results can provide references for the construction of pile foundations, structural design optimization, and for frozen damage prevention and treatment in permafrost regions.
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Research context
OpenAlex topics: Climate change and permafrost · Landslides and related hazards · Geotechnical Engineering and Soil Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
College of Transportation Engineering, Nanjing Tech University, Nanjing 210009, China
Funding
National Natural Science Foundation of China · Open Fund of State Key Laboratory of Frozen Soil Engineering
References (23)
Show source-provided references
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