文献类型：期刊文献

英文题名：Failure mechanism of joint-separated granite reinforced by three-dimensional printed bolt

作者：Feng, X.[1]; Xue, F.[2]; Liu, X.[2]; Wang, M.[2]

机构：[1] State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou, China; [2] College of Civil Engineering, Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Shaoxing University, Shaoxing, China

年份：2021

卷号：11

期号：4

起止页码：270

外文期刊名：Geotechnique Letters

收录：EI(收录号：20215111364334)、Scopus(收录号：2-s2.0-85121313814)

基金：This study was financially supported by the National Natural Science Foundation of China (51804296) and the Natural Science Foundation of Zhejiang Province (LQ20E080006).

语种：英文

外文关键词：3D printers - Bearing capacity - Bearings (machine parts) - Bolts - Granite - Reinforcement - Shearing

外文摘要：This technical note uses bolt-reinforced jointed granite to investigate the relationship between the joint angle and the reinforcing effects of bolt. Three-dimensional-printed (3DP) bolts were manufactured with a real bolt as the model prototype, the dimensions and surface geometries were scaled down, and the mechanical properties were similar to those of the prototype bolt. The cylindrical granite specimens were prepared with each separated by a through-going inclined joint plane, the bolt and the granite were combined by way of bonding agent and nuts. The bearing capacity of the system, the loading status of the bolt, and the displacement/strain changing patterns on the surface of the granite were comprehensively investigated. The results indicated that granite tended to crack when the joint angle was small and that a higher joint angle weakened the bearing capacity of the system, even with the reinforcement of the bolt. For specimens with joint angles of 45 and 60°, a shearing tendency and strain concentration zones nearby the joint plane were clearly observed. This study provides a new methodology for analysing the anti-shearing behaviour of bolt in fractured hard rock. ? 2021 ICE Publishing. All rights reserved.