Author(s)

Hao Cheng¹, Peifeng Han^1,2,3*, Youwen Su¹

¹School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, China.
²Research Center on Mountain Torrent and Geologic Disaster Prevention, Ministry of Water Resources, Wuhan, China.
³Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang, China.

The paper aimed to investigate internal mechanics between disintegration of the rockfill material and stability of the dam, and further provide scientific evidence for the design of rockfills, through the conducted disintegration of water pressure and triaxial test to analyze fractal characteristics, strength and deformation of the rockfill in whole disintegration procedure. As the results that the water pressure was low 0.2 MPa, the increasing water pressure would delay the disintegration rate of rockfill; while the water pressure was above 0.2 MPa, it would promote the disintegration rate of the rockfill. In addition, in the disintegration process, the cohesion force of rockfill rapidly slowed down at the beginning and then gradually increased. The internal friction angle increased gradually during the whole disintegration process. Furthermore, when the water pressure increased from 0 MPa to 0.6 MPa, the partial stress firstly decreased to a minimum level when the water pressure was 0.2 MPa, and then increased gradually with water pressure.

Rockfill, Slaking Characteristics, Fractal Dimension Value, Strength, Defor-mation

Cheng, H. , Han, P. and Su, Y. (2020) Investigation on Fractal Characteristics of Disintegration Process and Strength of Rockfill under Water Pressure. Journal of Geoscience and Environment Protection, 8, 20-35. doi: 10.4236/gep.2020.86003.