文献类型：期刊文献

英文题名：Failure Mechanism of Joint-separated Granite Reinforced by 3D printed bolt

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

机构：[1]China Univ Min & Technol, Sch Mines, State Key Lab Coal Resources & Safe Min, Xuzhou 221116, Jiangsu, Peoples R China;[2]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Coll Civil Engn, Shaoxing 312000, Peoples R China

年份：2021

卷号：11

期号：4

外文期刊名：GEOTECHNIQUE LETTERS

收录：SCI-EXPANDED(收录号：WOS:000729133800008)、、WOS

语种：英文

外文关键词：Anchors & anchorages; Rocks/rock mechanics; Strength & testing of materials

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. 3D-printed (3DP) bolts were manufactured with a real bolt as the model prototype, the dimensions and surface geometries were scaled up, 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 via 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 degrees and 60 degrees, a shearing tendency and strain concentration zones nearby the joint plane were clearly observed. This study provide a new methodology for studying the anti-shearing behaviour of bolt in fractured hard rock.