Experimental study on remodeling strength of granular materials under different loads and lengths of time

• Published in: Journal of Central South University Vol. 22; no. 7; pp. 2783 - 2790
• Main Authors: Han, Liu, Zhou, Wei, Cai, Qing-xiang, Shu, Ji-sen, Jing, Hong-wen, Li, Xin
• Format: Journal Article
• Language: English
• Published: Changsha Central South University 01.07.2015
• Subjects: Engineering; Metallic Materials; shear strength; remodeling; granular materials; time; load
• ISSN: 2095-2899; 2227-5223
• DOI: 10.1007/s11771-015-2809-y

Remodeled clay and sand rock specimens were prepared by designing lateral confinement and water drainage experiments based on the stress exerted on granular materials in a waste dump. An in situ test was conducted in an internal waste dump; the physical and mechanical parameters of the remodeled rock mass dumped at different time and depths were measured. Based on statistics, regression analysis was performed with regard to the shearing stress parameters acquired from the two tests. Other factors, such as remodeling pressure (burial depth), remodeling time (amount of time since waste was dumped), and the corresponding functional relationship, were determined. Analysis indicates that the cohesion of the remodeled clay and its remodeling pressure are correlated by a quadratic function but are not correlated with remodeling time length. In situ experimental results indicate that the shear strength of reshaped granular materials in the internal dump is positively correlated with burial depth but poorly correlated with time length. Cohesion C and burial depth H follow a quadratic function, specifically for a short time since waste has been dumped. As revealed by both in situ and laboratory experiments, the remodeling strength of granular materials varies in a certain pattern. The consistency of such materials verifies the reliability of the remodeling experimental program.