A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Shear strength-dilation characteristics of coral sand contained fines
Abstract Coral sand (CS) always contain different contents of fines and consequently cause some changes to shear behavior which is distinct from the regular silicious sand. To examine the effects of stress level (σ3), fines (FS), and relative density (Dr) on shear strength-dilation behaviors of CS, a series of consolidated drained tests and gray correlation analysis were conducted. Results show that peak strength of sandy soil improved by increasing σ3 and Dr but reduced as increasing FS content. However, the peak strength loss rate η increased with an increase of Dr or FS content but decreased as increasing σ3. In addition, strain softening of mixture was aggravated by increasing σ3, Dr, and FS percentage. Particularly, the shear dilatancy of mixture transformed to shear contraction as σ3 increased from 200 to 400 kPa. Maximum angle of dilation has an approximate linear relation with peak-state friction angle. Gray correlation analysis indicated that the influence of stress level and FS content on peak strength and strain-softening of sandy soil is more prominent than Dr. Furthermore, when Dr increased or FS content decreased, the internal friction angle of mixture increased linearly. The cohesion force of mixture has a positive linear relation with Dr while appears a hyperbolic relation with FS content. Based on the concept of equivalent void ratio, the grain contact and mixture phase were discussed. Finally, the modified Mohr-Coulomb criterion of mixture was proposed considering Dr and FS content.
Shear strength-dilation characteristics of coral sand contained fines
Abstract Coral sand (CS) always contain different contents of fines and consequently cause some changes to shear behavior which is distinct from the regular silicious sand. To examine the effects of stress level (σ3), fines (FS), and relative density (Dr) on shear strength-dilation behaviors of CS, a series of consolidated drained tests and gray correlation analysis were conducted. Results show that peak strength of sandy soil improved by increasing σ3 and Dr but reduced as increasing FS content. However, the peak strength loss rate η increased with an increase of Dr or FS content but decreased as increasing σ3. In addition, strain softening of mixture was aggravated by increasing σ3, Dr, and FS percentage. Particularly, the shear dilatancy of mixture transformed to shear contraction as σ3 increased from 200 to 400 kPa. Maximum angle of dilation has an approximate linear relation with peak-state friction angle. Gray correlation analysis indicated that the influence of stress level and FS content on peak strength and strain-softening of sandy soil is more prominent than Dr. Furthermore, when Dr increased or FS content decreased, the internal friction angle of mixture increased linearly. The cohesion force of mixture has a positive linear relation with Dr while appears a hyperbolic relation with FS content. Based on the concept of equivalent void ratio, the grain contact and mixture phase were discussed. Finally, the modified Mohr-Coulomb criterion of mixture was proposed considering Dr and FS content.
Shear strength-dilation characteristics of coral sand contained fines
Li, Xue (author) / Liu, Jiankun (author) / Sun, Zhaohui (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Effect of Fibreglass on Shear Strength and Dilation Characteristics of Sand
| BASE | 2015
Liquefaction Strength Characteristics of Compacted Sand Samples Containing Fines
| British Library Conference Proceedings | 2007
Effect and mechanism of fines content on the shear strength of calcareous sand
| Springer Verlag | 2021