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Abstract

The newly built Minjiang Bridge in Meishan City, Sichuan Province applies the concept of cable-assisted girder bridge. P4 steel arch tower combined with three-stage balanced double-plane cable and P3 and P5 auxiliary towers combined with thin cable of single cable plane were used to assist the load on the beam body, making the 2.5 m-high concrete main beam meet the requirements of the main span of 2 × 120 m. Through the analysis of the bearing force, the angle between the double-limb arch tower was 43.6°, and two pairs of cables were set in the auxiliary tower to achieve the design purpose of balanced load on the beam body and the steel arch tower. The restraint system adopted the P4 arch tower for tower and beam separation and P3 and P5 auxiliary towers for tower and beam consolidation and pier and beam separation. The whole 8-span bridge totalling 500.5 m was an integrated layout, achieving comprehensive optimal performance such as structural safety, driving comfort, and convenient maintenance in the later period. The main girder was designed with a one-box four-chamber flat concrete box girder according to the full prestressed structure. Edge anchorage and web anchorage were adopted on the main girder for the main tower and auxiliary tower cable, respectively. P4 double-limb steel arch tower used a rotary hinge and “synchronous symmetrical vertical rotation” construction method to rotate the joint arch platform into place and constituted the bridge through the concrete joint section and the special-shaped tower in the concrete space.

Publication Date

7-14-2023

DOI

10.14048/j.issn.1671-2579.2023.03.022

First Page

139

Last Page

145

Submission Date

March 2025

Reference

[1] 邓文中.索辅梁桥[J].桥梁，2008（4）：1‑3. DENG W Z. Cable-assisted girder bridge[J]. Bridge, 2008(4):1-3. [2]邓文中.重庆两江大桥设计理念[J].桥梁，2009（6）：40‑43. DENG W Z. Design concept of Chongqing Liangjiang Bridge[J]. Bridge, 2009(6):40-43. [3] MA Zhendong，JIANG Zhonggui，LIU Anshuang.Shenyang Sanhao bridge[C]// Third International FIB Congress 2010，1：763‑771. [4] 陈军, 程华强, 高云, 等. 独塔斜拉桥钢拱塔竖转方案设计与施工[J]. 交通科技, 2017(1): 83-86. CHEN Jun, CHENG Huaqiang, GAO Yun, et al. Scheme and construction design for vertical rotation of steel arch pylon of single tower cable-stayed bridge[J]. Transportation Science & Technology, 2017(1): 83-86. [5] 肖汝诚. 桥梁结构体系[M]. 北京: 人民交通出版社, 2013. XIAO Rucheng. Bridge structural systems[M]. Beijing: China Communications Press, 2013. [6] 武电坤, 冯鹏程, 吴晓勤, 等. 大吨位摩擦摆支座在空腹式连续梁桥中的应用[J]. 中外公路, 2021, 41(6): 161-166. WU Diankun, FENG Pengcheng, WU Xiaoqin, et al. Application of large-tonnage friction pendulum bearing in open-spandrel continuous beam bridge[J]. Journal of China & Foreign Highway, 2021, 41(6): 161-166. [7] 李志强, 王浩铭, 王大千. 基于摩擦摆支座的大跨度双拱塔斜拉桥减隔震研究[J]. 世界桥梁, 2018, 46(6): 36-40. LI Zhiqiang, WANG Haoming, WANG Daqian. Study of vibration mitigation and isolation for long-span cable-stayed bridge with double arch pylons based on friction pendulum bearings[J]. World Bridges, 2018, 46(6): 36-40. [8] WANG Yanhua, FENG Yan, WU Jing. A simplified simulation method of friction pendulum bearings[J]. Journal of Southeast University (English Edition), 2018, 34(4): 480-487. [9] 臧朔. 基于摩擦摆支座的大跨度连续箱梁桥抗震性能提升[D]. 石家庄: 石家庄铁道大学, 2022. ZANG Shuo. Improvement of seismic performance of long-span continuous box girder bridge based on friction pendulum bearing[D]. Shijiazhuang: Shijiazhuang Tiedao University, 2022. [10] 刘斌, 李瑜. 南洞庭胜天大桥塔上钢锚梁受力性能研究[J]. 中外公路, 2021, 41(3): 194-199. LIU Bin, LI Yu. Study on mechanical behavior of steel anchor beam on tower of Shengtian bridge in South Dongting Lake[J]. Journal of China & Foreign Highway, 2021, 41(3): 194-199. [11] 陈璐, 陈小佳. 多段索异形塔斜拉桥施工阶段索力计算[J]. 中外公路, 2021, 41(1): 143-148. CHEN Lu, CHEN Xiaojia. Discussion on cable tensile forces calculation of multi-segmental special-shaped cable-stayed bridges in contruction stages[J]. Journal of China & Foreign Highway, 2021, 41(1): 143-148. [12] 林元培. 斜拉桥[M]. 北京: 人民交通出版社, 2004. LIN Yuanpei. Cable-stayeb bridge[M]. Beijing: China Communications Press, 2004. [13] 交通运输部. 公路钢筋混凝土及预应力混凝土桥涵设计规范: JTG 3362—2018[S]. 北京: 人民交通出版社, 2018. Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts: JTG 3362—2018[S]. Beijing: China Communications Press, 2018. [14] 吉姆辛. 缆索承重桥梁: 构思与设计[M]. 北京: 人民交通出版社, 1992. JIM G N. Cable supported bridges concept and design[M]. Beijing: China Communications Press, 1992. [15] 马振栋, 陈家勇, 赖亚平. 索辅梁拱塔斜拉桥体系受力研究[J]. 公路交通技术, 2021, 37(2): 71-77. MA Zhendong, CHEN Jiayong, LAI Yaping. Study on the stress of cable-stayed bridge system of cable auxiliary beam arch tower[J]. Technology of Highway and Transport, 2021, 37(2): 71-77.

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