Supporting Capacity Anal ysis and Construction Scheme Optimization of Support System for Cast‑in‑Situ Box Girders in High‑Pier Wading Bridges

Authors

GUO Tao, Faculty of Civil Engineering and Mechanics , Kunming University of Science and Technology , Kunming ,Yunnan 650500 , ChinaFollow
YAO Yuchen, Yunnan Yingzhu Construction Equipment Leasing Co ., Ltd., Kunming ,Yunnan 650200 , China
MA Hongze, Faculty of Civil Engineering and Mechanics , Kunming University of Science and Technology , Kunming ,Yunnan 650500 , China
HUANG Xiaomin, Faculty of Civil Engineering and Mechanics , Kunming University of Science and Technology , Kunming ,Yunnan 650500 , China
ZHANG Yongchun, Zhongsheng Hongyu Construction Technology Co ., Ltd., Yunan Branch Co ., Kunming ,Yunnan 650051 , China

Abstract

Although a concrete bridge su pport system is a temporary structure,it still has a supporting capacity.With the development of bridge engineering,concrete bridges with high piers and long spans are gradually applied in deep reservoir areas,and the forces on scaffolding are more and more complex.Traditional manual calculations in structural mechanics can no longer completely reflect the stress-strain states of scaffolding with irregular configurations,special parts,and uncommon conditions.Thus,it is necessary to use a numerical method to calculate the supporting capacity of scaffolding and design construction schemes.This paper took a concrete wading bridge with high piers as an example.An evaluation method based on the finite element method with the Midas civil software is proposed for analyzing the safety of a support system from the aspects of strength,rigidity,stability,and cost-effectiveness.The results show that although disc-type full scaffold structures are simple in construction,with low steel consumption,various stand bars,uniform stress distribution,and small deformation (a maximum deflection of only 2.82 mm ),their strength and stability are not as good as beam support systems.In addition,they have higher requirements for sites.Therefore,when disc-type full scaffold structures are applied to high-piers and large-span bridges,buckling analysis should be carried out on the whole model to prevent instability and collapse.Conversely,beam support systems usually do not suffer from strength and stability failures and have few requirements for sites.However,they are difficult to construct and require high steel consumption.Furthermore,deformation is increased due to the lack of vertical support in the midspan.Therefore,form-finding analysis must be carried out strictly when they are applied to complex bridges involving the “pre-camber ” problem.In addition,on the premise that mechanical indexes are met,measures can be taken to achieve higher cost-effectiveness,such as adjusting the net distance of Bailey beams and strengthening lower chords.In this case,the net distance was adjusted from 80 to 100 cm,which can save about 10% in steel consumption.

Publication Date

6-27-2024

DOI

10.14048/j.issn.1671-2579.2024.03.017

First Page

145

Last Page

152

Submission Date

February 2025

Recommended Citation

Tao, GUO; Yuchen, YAO; Hongze, MA; Xiaomin, HUANG; and Yongchun, ZHANG (2024) "Supporting Capacity Anal ysis and Construction Scheme Optimization of Support System for Cast‑in‑Situ Box Girders in High‑Pier Wading Bridges," Journal of China & Foreign Highway: Vol. 44: Iss. 3, Article 17.
DOI: 10.14048/j.issn.1671-2579.2024.03.017
Available at: https://zwgl1980.csust.edu.cn/journal/vol44/iss3/17

Reference

[1]交 通 运 输部.2022 年 交 通 运 输 行 业 发 展 统 计 公 报 [EB/OL]. (2022 -06-16) [2022 -10-21].https ://xxgk .mot.gov.cn/2020 /jigou/zhghs/ 202306/t20230615 _3847023 .html .Ministry of Transport .Statistical bulletin of transport industry development in 2022 [EB/OL ]. (2022 -06-16)[2022 -10-21].https ://xxgk .mot.gov.cn/2020 /jigou/zhghs/202306 /t20230615 _3847023 .html .
[2]交 通 运 输 部 .交 通 运 输 标 准 化 “十 四 五 ”发 展 规 划 [EB/OL]. (2021 -10-15) [2022 -10-20].https ://www .mot.gov.cn/zhuanti/shisiwujtysfzgh/ 202201 /t20220112 _3636127 .html .Ministry of Transport .Transport standardization development plan for “the 14th five-year ” plan [EB/OL ].(2021 -10-15)
[2022 -10-20]. https ://www .mot.gov.cn/zhuanti/shisiwujtysfzgh/ 202201 /t20220112 _3636127 .html .
[3]王树良 .圆拱形斜拉桥桥塔超高支架稳定性分析 [J].中外公路 ，2022 ,42（3）:142-148.WANG Shuliang .Stability analysis of tower super-high support of the circular arch cable-stayed bridge [J].Journal of China & Foreign Highway ,2022 ，42(3):142-148.
[4]牛 和 祥 .盘 扣 式 满 堂 支 架 法 现 浇 施 工 结 构 优 化 研 究 [J].黑龙江交通科技 ,2020 ,43(12):84-86.NIIU Hexiang .Study on structural optimization of cast-in-place construction of pantoon-type full fra ming method[J].Communications Science and Technology Heilongjiang ,2020 ,43(12):84-86.
[5]陈颖 .钢管桩支架体系在软基路段现浇箱梁中的应用研究[D].重庆 :重庆交通大学 ,2019 .CHEN Ying .Application research of steel pipe pile support system in cast-in-place box girder of soft foundation section [D].Chongqing :Chongqing Jiaotong University ,2019 .
[6]高 则 彦 .城 市 高 架 桥 现 浇 箱 梁 跨 河 支 架 设 计 与 施 工 [J].城市道桥与防洪 ,2015 (3):109-111,13.GAO Zeyan .Design and construction of crossing-river bracket for cast-in-site box girder of urban elevated bridge[J].Urban Roads Bridges & Flood Control ,2015 (3):109-111,13.
[7]尹 丽 丹 ,马 宁 .黏 弹 性 复 合 防 屈 曲 支 撑 钢 框 架 结 构 抗 震抗风性能分析 [J].自然灾害学报 ,2019 ,28(1):16-23.YIN Lidan ,MA Ning .Analysis of seismic and wind-resistant performance of viscous-elastic buckling-restrained braced frame [J].Journal of Natural Disasters ,2019 ,28(1):16-23.
[8]黄 佳 梅 ,易 伟 建 .近 场 脉 冲 地 震 下 考 虑 模 型 不 确 定 性 的桥梁时变抗震分析 [J].自然灾害学报 ,2021 ,30(1):99-108.HUANG Jiamei ,YI Weijian .Time-dependent seismic performance of bridges considering modeling uncertainties under near-field pulse-like ground motions[J].Journal of Natural Disasters ,2021 ,30(1):99-108.
[9]王一光 ，郑元勋 .某小半径现浇箱梁桥墩梁连接方式受力性能分析 [J].中外公路 ，2022 ,42（3）:64-68.WANG Yiguang ，ZHENG Yuanxun .Finite element analysis of mechanical performance of a small radius cast- in-place box girder bridge pier-beam connection method [J].Journal of China & Foreign Highway ,2022 ，42(3):64-68.
[10]周力毅 ,黄赣萍 ,周鑫 .采用加强型贝雷梁基础的桥梁支架施工工艺 [J].公路工程 ,2012 ,37(5):152-155.ZHOU Liyi ,HUANG Ganping ,ZHOU Xin .Using enhanced bailey girder bridge bracket construction technology of foundation [J].Highway Engineering ,2012 ,37(5):152-155.
[11]陆征然 ,郭超 ,李帼昌 ,等.水平冲击荷载作用下高大满堂支 撑 架 动 力 性 能 研 究 [J].天 津 大 学 学 报 (自 然 科 学 与 工程技术版 ),2017 ,50(增刊 1):68-77.LU Zhengran ,GUO Chao ,LI Guochang ,et al .Study on dynamic performance of tall and full-house support frame under horizontal impact load [J].Journal of Tianjin University (Science and Technology ),2017 ,50(sup 1):68-77.
[12]庄 明 智 ,方 圣 恩 .半 刚 性 钢 框 架 稳 定 理 论 的 扣 件 式 钢 管满 堂 支 撑 体 系 极 限 承 载 力 分 析 [J].福 州 大 学 学 报 (自 然科学版 ),2016 ,44(4):557-562.ZHUANG Mingzhi ,FANG Sheng ’en.Ultimate load-carrying capacity analysis of fastener steel tube full-hall formwork support systems on stability theory of semi-rigid steel frame [J].Journal of Fuzhou University (Natural Science Edition ),2016 ,44(4):557-562.
[13]梁岩 ,高杰 ,陈全兴 .现浇混凝土箱梁满堂支撑体系方案优选分析 [J].施工技术 ,2016 ,45(24):64-67,87.LIANG Yan ,GAO Jie ,CHEN Quanxing .Supporting system scheme optimizing analysis of cast-in-situ concrete box girder [J].Construction Technology ,2016 ,45(24):64-67,87.
[14]翟文静 ,张茂华 .贝雷架在桥梁快速施工中的应用 [J].四川建筑 ,2010 ,30(3):167-169.ZHAI Wenjing ,ZHANG Maohua .Application of bailey frame in bridge rapid construction [J].Sichuan Architecture ,2010 ,30(3):167-169.
[15]刘学明 ,刘世忠 .钢管柱 ‒贝雷梁支架体系施工工艺及设计检算 [J].铁道建筑 ,2016 ,56(9):43-46.LIU Xueming ,LIU Shizhong .Construction technology and design calculation of steel tube column-bailey beam supporting system [J].Railway Engineering ,2016 ,56(9):43-46.