Innovation and Practice of Cable-Pylon Anchorage Zone Using Group Aggregated Anchor System

Innovation and Practice of Cable-Pylon Anchorage Zone Using Group Aggregated Anchor System

Yonggao Yin, Qian Li, Jiangguo Lv, Zhu Yu

Abstract: With the development of the cable-stayed bridge, the anchorage form on pylon of cable-stayed has been improved and innovated continuously, and the anchorage methods such as circumferential prestressed anchorage, steel anchor beam and steel anchor box have been gradually formed and developed, which further increases the span of cable-stayed bridge and meets the social needs of economic development and environmental integration. The group aggregated anchorage system between cable and pylon is a kind of anchorage form outside the pylon, which has the characteristics of clear force transmission, simple structure and high construction efficiency. It has been successfully applied in Chizhou Yangtze River Bridge for the first time. The main span of Chizhou Yangtze River Bridge is 828m, and the cable-stayed bridge with spatial cable plane of two towers is constructed. Six steel beams are deployed between tower legs to anchor 54 pairs of cables respectively. The steel beams and the concrete tower columns are effectively connected by prestressed anchors, shear nails and short steel bars, which could transfer the cable force to the tower column reliably. This kind of anchoring system has clear force transmission, which could reduce the tensile stress of concrete tower column and the risk of concrete cracking. Meanwhile, the steel beam could be constructed by the engineering manufacture and the field installation, which could reduce the working time at height, further the construction quality and safety could be controlled. Based on the construction of Chizhou Yangtze River Bridge, this paper mainly introduces the proposal, construction, key construction technology and engineering application effect of group aggregated anchorage system. The engineering practice proves that this new type of anchorage could not only meet the basic requirements of the intrinsic safety of the bridge, but integrate with the regional culture to create the beauty of natural harmony as well.

Keywords
Cable-Stayed Bridge, Cable-Pylon Anchorage Zone, Group Aggregated Anchor System, Structure, Construction

Published online 2/20/2021, 8 pages
Copyright © 2021 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Yonggao Yin, Qian Li, Jiangguo Lv, Zhu Yu, Innovation and Practice of Cable-Pylon Anchorage Zone Using Group Aggregated Anchor System, Materials Research Proceedings, Vol. 18, pp 294-301, 2021

DOI: https://doi.org/10.21741/9781644901311-36

The article was published as article 36 of the book Structural Health Monitoring

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] Zhuanghong Lou. Collection of papers on bridges by Zhuanghong Lou [M]. Beijing: China Communications Press, 2004.
[2] Shilin Liu, Zhitao Liang, Jinlong Hou, Fanchao Meng. Cable-stayed Bridge [M]. Beijing: China Communications Press, 2002.
[3] Changpeng Liu, Xigang Zhang, Rengui Wang, Feng Wen. Study on Stress and Structural Characteristics of Cable Tower Anchorage Zone of Composite Structure [J]. Highway, 2012 (1): 117-121.
[4] Qifen Wei, Ying Chang, Wenhai Ye, Kai Bai. Structural Design and Calculation of Cable Tower Anchorage Zone of Edong Yangtze River Highway Bridge [C]. The 20th National bridge Academic Conference, Wu Han, Hu Bei Province, May 15th, 2012.
[5] Industry recommended standards of the People’s Republic of China. Guidelines for Design of Highway Cable—stayed Bridge [S]. Beijing: China Communications Press, 2007.
[6] Lu Shen, Wenliang Qiu. Analysis and Experimental Study on Prestress Loss of Circumferential Steel Tendons in Anchorage Zone of Pylon of Long Span Cable-stayed Bridge [J]. Journal of Water Resources and Architectural Engineering, 2016, 14(2): 97-99.
[7] Yiqiang Xiang, Shaoping Yi, Xiaoqing Du, Xing Xu. Study on Full Scale Model of Cable-stayed Pylon Segment of Nancha Bridge of The Second Nanjing Yangtze River Bridge [J]. China Civil Engineering Journal, 2000, 33(1): 16-22.
[8] Byung-Wan Jo, Yunn-Ju Byun, Ghi-Ho Tae. Structural Behavior of Cable Anchorage Zones in Prestressed Concrete Cable-stayed Bridge[J]. Canadian Journal of Civil Engineering, 2002, 29(1): 171-180. https://doi.org/10.1139/l01-087
[9] Burdet O. Analysis and Design of Anchorage Zones in Post-Tensioned Concrete Bridges[D]. Austin: University of Texasat Austin, 1990.
[10] Xigang Zhang, Yuqing Liu. Anchorage structure of composite cable tower [M]. Beijing: China Communications Press, 2010.
[11] Canwen Yang, Qiang Zhang, Jianhua Shi. Design of Main Navigable Span Bridge of Chizhou Yangtze River Highway Bridge [J]. Bridge Construction, 2016, 46(4): 92-96.
[12] Po Wen, Qiang Zhang, Jianhua Shi. Design of Anchorage Structure for Upper Beam of Main Bridge Tower of Chizhou Yangtze River Highway Bridge [J]. Bridge Construction, 2017, 47(2): 83-88.