On-site full-scale test research for difference of anti-pull bearing characteristics between single anchor and group anchors foundation of transmission lines

• Published in: 地质科技通报 Vol. 43; no. 6; pp. 114 - 124
• Main Authors: Wenxiang ZHANG, Qiang CUI, Haoci QIU, Zhou LU, Banglu XI, Zhenhua ZHANG
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Bulletin of Geological Science and Technology 01.11.2024
• Subjects: anchor foundation; anchor rock bond strength; bearing test; distributed optical fiber; on-site full-scale test; transmission line
• ISSN: 2096-8523
• DOI: 10.19509/j.cnki.dzkq.tb20240221

Objective To investigate the differences in anti-pull bearing characteristics between single anchor and group anchors foundations of transmission lines, Methods this study employs a combination of theoretical analysis and field experiments. First, based on the structural characteristics, the bearing mechanisms of singleand group anchors were analyzed in terms of force and deformation. The full-length bonded anchors, commonly used in transmission line projects, were selected as the research object, with the granite ground in Quanzhou selected as the test site. On-site full-scale tests were conducted on three single anchors and four group anchors. Displacement sensors were used to monitor foundation and ground deformation, while optical frequency domain reflectometry (OFDR) recorded the strain in the anchor rods. The load-displacement curve of the test foundation and the internal force distribution along the anchor interface were obtained. Finally, a comparative analysis of the deformation and failure mechanism