Journal Published Online: 28 February 2019
Volume 47, Issue 6

Investigation of Macroscopic and Microscopic Behavior of Gravels Using Triaxial Compression Test with CT Scan

CODEN: JTEVAB

Abstract

A large number of studies have been conducted to investigate macroscopic responses of gravelly soils using large-scale triaxial compression tests; however, particle-level responses of gravelly soils under triaxial compression remain poorly explored. Here, we reported a series of large-scale triaxial compression tests on uniformly graded gravels subjected to a low to medium range of confining pressures (200–800 kPa). We further investigated the particle-level responses of the gravels using the combined triaxial compression test with computed tomography (CT) scan. A computer image analysis program was developed to analyze the CT images, providing visualized and quantitative particle displacement and rotation. Based on the experimental results, the stress-strain relationships at different confining pressures and the microscopic characteristics of the gravels (e.g., changes in internal structures) under different deviator stress levels were discussed. The changes in particle-level responses were linked to those in macroscopic responses. From both macroscopic and microscopic analyses, some insights into the underlying mechanism of the stress-strain relationships were provided.

Author Information

Jiang, Jingshan
School of Architectural Engineering, Nanjing Institute of Technology, Nanjing, China
Lin, Cheng
Department of Civil Engineering, University of Victoria, Victoria, BC, Canada
Cheng, Zhanlin
Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan, China
Zuo, Yongzhen
Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan, China
Pages: 15
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: JTE20180547
ISSN: 0090-3973
DOI: 10.1520/JTE20180547