Experimental research on microscopic and macroscopic damage evolution of artificial frozen sandy gravel

Artificial frozen sandy gravel exhibits the characteristics of wide distribution of particle size and complex composition, which are quite distinct from frozen fine-grained soils such as clay and silt. It may be more accurate to use both macroscopic and microscopic scales to evaluate the damage of a...

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Bibliographic Details
Published in:Bulletin of engineering geology and the environment 2024-04, Vol.83 (4), p.103, Article 103
Main Authors: Wu, Wang, Yan, Qixiang, Liu, Chenyao, Qiu, Yunhui, Zhang, Chuan
Format: Article
Language:English
Subjects:
Clay soils
Compression
Computed tomography
Constitutive relationships
Damage assessment
Earth and Environmental Science
Earth Sciences
Evolution
Experimental research
Fine-grained soils
Foundations
Freezing
Geoecology/Natural Processes
Geoengineering
Geotechnical Engineering & Applied Earth Sciences
Gravel
Ground freezing
Hydraulics
Laboratory experimentation
Mathematical analysis
Microcracks
Nature Conservation
Numerical simulations
Original Paper
Particle size distribution
Plastics
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Summary:Artificial frozen sandy gravel exhibits the characteristics of wide distribution of particle size and complex composition, which are quite distinct from frozen fine-grained soils such as clay and silt. It may be more accurate to use both macroscopic and microscopic scales to evaluate the damage of artificial frozen sandy gravel. Therefore, this paper proposes an investigation on the macro-plastic damage and micro-crack damage of artificial frozen sandy gravel through triaxial compression and X-ray CT scanning tests. The two types of damage are obtained from completely different macro-plastic and micro-crack damage theoretical calculation methods. It can be concluded that the evolution law of the two damages is similar, but the value is different. Moreover, the defined cross-scale modified damage which is fitted through the calculated macro-plastic damage and micro-crack damage is proposed. The fitting functions reveal the evolution law of frozen sandy gravel damage more accurate, which is beneficial to the safety of the artificial ground freezing project and provides a valuable reference for subsequent numerical simulations of the frozen sandy gravel constitutive relationship.
ISSN:1435-9529
1435-9537
DOI:10.1007/s10064-024-03592-2