Effect of gradation curve and dry density on collapse deformation behavior of a rockfill material

Rockfill material, such as other coarse grained materials, undergoes rapid or sudden settlements of relatively large values, without any changes in the applied loads and only because of submerging. In the literature this phenomenon is called collapse deformation. The effects of gradation curve and d...

Full description

Saved in:
Bibliographic Details
Published in:KSCE journal of civil engineering 2015, 19(3), , pp.631-640
Main Authors: Tabibnejad, Ahmadreza, Heshmati, Aliakbar, Salehzadeh, Hossein, Tabatabaei, Saeed Hashemi
Format: Article
Language:English
Subjects:
Civil Engineering
Collapse
Deformability
Deformation
Deformation effects
Density
Dry density
Drying
Elasticity
Engineering
Formability
Friction reduction
Geotechnical Engineering
Geotechnical Engineering & Applied Earth Sciences
Industrial Pollution Prevention
Internal friction
Reduction
Rockfill
Saturation
Shear strength
Submerging
Volumetric strain
토목공학
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Rockfill material, such as other coarse grained materials, undergoes rapid or sudden settlements of relatively large values, without any changes in the applied loads and only because of submerging. In the literature this phenomenon is called collapse deformation. The effects of gradation curve and dry density on the collapse deformation behavior of a rockfill material were explored and the changes in the strength and deformability parameters of this material caused by submerging were determined. Two large scale triaxial equipments with three different sample diameters of 20, 30 and 80 cm were employed and a set of dry-saturated tests were conducted. Specimens with different gradation curves and various initial dry densities were tested. The results indicate that in all of the dry-saturated tests, sudden reductions in the shear strengths and volumes of the specimens were observed during the submerging process. The effects of material maximum particle size, fines content and initial dry density on the value of sudden shear strength reduction, internal friction angle reduction caused by saturation (Δ ϕ c ), the change in elasticity modulus of the material due to submerging, i.e., ( E wet / E dry ), and also the saturation-induced sudden volumetric strain ( ε vc ) were evaluated and discussed.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-013-0682-5