Investigation on Fractal Characteristics of Disintegration Process and Strength of Rockfill under Water Pressure  

作　　者：Hao Cheng Peifeng Han Youwen Su Hao Cheng;Peifeng Han;Youwen Su(School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, China;Research Center on Mountain Torrent and Geologic Disaster Prevention, Ministry of Water Resources, Wuhan, China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang, China)

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

出　　处：《Journal of Geoscience and Environment Protection》2020年第6期20-35,共16页地球科学和环境保护期刊（英文）

摘　　要：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.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.

关 键 词：ROCKFILL Slaking Characteristics Fractal Dimension Value STRENGTH Defor-mation 

分 类 号：TD2[矿业工程—矿井建设]