大跨度单线铁路混凝土连续梁桥施工合龙方案研究
|
摘要
以某铁路专用线上一座(48+80+48) m连续梁桥为工程背景,研究关于悬臂浇筑施工合龙方案对主桥施工过程中应力与挠度以及成桥线形的影响。根据该桥设计特点以及施工可行性,拟定4种不同的合龙方案,并对其进行有限元仿真研究。研究结果表明:不同的合龙方案对桥梁施工过程以及成桥后的应力、挠度有较大的影响;选择在拆除挂篮后,先边跨后中跨浇筑的合龙方案可以有效地减小桥梁施工过程中主桥应力以及挠度,对成桥线形能更好地控制。在该合龙方案下,考虑温度的影响对其中跨合龙段劲性骨架进行合理设计。研究成果可为该类型连续梁合龙施工方案的选择提供参考。
Taking a(48+80+48) m continuous beam bridge in a railway special line as the engineering background, the influence of the closure scheme on the stress and the deflection in the cantilever construction process and at the finished bridge state is discussed. According to the design features and construction feasibility of the bridge, four different closure schemes have been studied out. The results of finite element simulation analysis of the four different closure schemes show that: Different schemes have great influences on the stress and deflection in bridge construction process and at finished bridge state. After removing the hanging basket, the closure scheme that pouring between two sides firstly and middle secondly can effectively reduce the stress in bridge construction process, and it can also accurately control the deflection better at finished bridge state. The stiff skeleton of the middle closure section is designed for this superior closure scheme. The research of this paper provides a reference for the selection of the construction scheme of this type of continuous beam bridge.
Taking a(48+80+48) m continuous beam bridge in a railway special line as the engineering background, the influence of the closure scheme on the stress and the deflection in the cantilever construction process and at the finished bridge state is discussed. According to the design features and construction feasibility of the bridge, four different closure schemes have been studied out. The results of finite element simulation analysis of the four different closure schemes show that: Different schemes have great influences on the stress and deflection in bridge construction process and at finished bridge state. After removing the hanging basket, the closure scheme that pouring between two sides firstly and middle secondly can effectively reduce the stress in bridge construction process, and it can also accurately control the deflection better at finished bridge state. The stiff skeleton of the middle closure section is designed for this superior closure scheme. The research of this paper provides a reference for the selection of the construction scheme of this type of continuous beam bridge.
引文
[1]李十思.悬臂浇筑连续梁合龙方式对线形及内力的影响分析[J].建筑设计, 2014, 43(5):69-73.LI Shisi. The analysis of the closure method to alignment and the internal force on continuous beam poured by cantilever[J]. Architectural Design, 2014, 43(5):69-73.
[2]周鑫,张雪松,向中富.悬臂施工连续梁桥合龙方案的讨论[J].公路交通技术, 2006, 8(4):96-99.ZHOU Xin, ZHANG Xuesong, XIANG Zhongfu.Discussion on cantilever construction continuous beam bridge final butting plan[J]. Technology of Highway and Transport, 2006, 8(4):96-99
[3]胡丰玲,丁汉山.连续梁桥中跨合龙方案设计[J].淮海工学院学报(自然科版), 2004, 13(1):66-70.HU Fengling. DING Hanshan. A design of joining the middle span of continuous pre-stressed bridges[J].Journal of Huaihai Institute of Technology, 2004, 13(1):66-70.
[4]张隆顺.大跨长联连续梁桥合龙方案研究[D].长沙:中南大学, 2012.ZHANG Longshun. Researches on closure scheme of the long-span and long continuous gider bridge[D]. Changsha:Central South University, 2012.
[5]渠广镇.多跨长联连续梁桥施工控制关键问题研究[D].西安:长安大学, 2010.QU Guangzhen. Research on the key technology in construction control of long multi-span PC continuous beam bride[D]. Xi’an:Chang’an University, 2010.
[6]郑青松.跨廊良路连续梁合龙段施工与体系转换[J].国防交通工程与技术, 2008, 6(5):70-72.ZHENG Qingsong. Construction and system transformation of closure joint section on the continuous beam[J]. National Traffic Engineering and Technology for National Defense, 2008, 6(5):70-72.
[7]章铁军.南水北调丹江口汉江大桥主桥合龙顺序设计研究[C]//第17届全国结构工程学术会议, 2008.ZHANG Tiejun. Design of Danjiankou-Hanjiang bridge in the south-to-north water diversion project with different girder closure sequence[C]//The 17th National Academic Conference on Structural Engineering, 2008.
[8]段斌.多跨长联连续梁桥合龙施工探讨[J].黑龙江交通科技, 2015(7):152.DUAN Bin. The discussion of girder closure on long construction of multi span continuous beam bridge[J].Communication Science and Technology Heilongjiang,2017(7):152.
[9]肖啸.基于不同施工进度下多跨连续梁桥合龙顺序的研究[D].长沙:中南大学, 2014.XIAO Xiao. Optimization of multi-span continuous beam closure sequences under the different construction progress[D]. Changsha:Central South University, 2014.
[10]何军.大跨连续刚构桥施工控制及合龙方案研究[D].西安:长安大学, 2011.HE Jun. The study of closure technics and construction control technology for long span continuous rigid-frame bridge[D]. Xi’an:Chang’an University, 2011.
[11]宋培浩.连续梁合龙顺序分析优化[J].工程技术,2015(8):54-57.SONG Peihao. The analysis and optimization of closure sequences on continuous beam[J]. Engineering Technology, 2015(8):54-57.
[12]郑斐.劲性骨架对悬臂施工桥梁合龙段影响分析[D].西安:长安大学, 2008.ZHENG Fei. The influence analysis of stiff skeleton on the closure section of the bridge by cantilever construction method[D]. Xi’an:Chang’an University,2008.
[13]施建振,虞建成,施为民.连续箱梁桥中跨合龙段劲性骨架优化设计[J].施工技术, 2004, 9(9):3-6.SHI Jianzhen, YU Jiancheng, SHI Weimin. Optimial design of the stiff skeleton at the locking section of the middle span of a continuous box beam brifge[J].Construction Technology, 2004, 9(9):3-6.
[14]尚晋,李东,李博强.悬浇梁合龙段劲性骨架结构分析[J].沈阳大学学报(自然科学版), 2013, 8(4):326-332.SHANG Jin, LI Dong, LI Boqiang. Analysis of the stiff skeleton at the closure section of the bridge by cantilever construction method[J]. Journal of Shenyang University(Natural Science), 2013, 8(4):326-332.
[2]周鑫,张雪松,向中富.悬臂施工连续梁桥合龙方案的讨论[J].公路交通技术, 2006, 8(4):96-99.ZHOU Xin, ZHANG Xuesong, XIANG Zhongfu.Discussion on cantilever construction continuous beam bridge final butting plan[J]. Technology of Highway and Transport, 2006, 8(4):96-99
[3]胡丰玲,丁汉山.连续梁桥中跨合龙方案设计[J].淮海工学院学报(自然科版), 2004, 13(1):66-70.HU Fengling. DING Hanshan. A design of joining the middle span of continuous pre-stressed bridges[J].Journal of Huaihai Institute of Technology, 2004, 13(1):66-70.
[4]张隆顺.大跨长联连续梁桥合龙方案研究[D].长沙:中南大学, 2012.ZHANG Longshun. Researches on closure scheme of the long-span and long continuous gider bridge[D]. Changsha:Central South University, 2012.
[5]渠广镇.多跨长联连续梁桥施工控制关键问题研究[D].西安:长安大学, 2010.QU Guangzhen. Research on the key technology in construction control of long multi-span PC continuous beam bride[D]. Xi’an:Chang’an University, 2010.
[6]郑青松.跨廊良路连续梁合龙段施工与体系转换[J].国防交通工程与技术, 2008, 6(5):70-72.ZHENG Qingsong. Construction and system transformation of closure joint section on the continuous beam[J]. National Traffic Engineering and Technology for National Defense, 2008, 6(5):70-72.
[7]章铁军.南水北调丹江口汉江大桥主桥合龙顺序设计研究[C]//第17届全国结构工程学术会议, 2008.ZHANG Tiejun. Design of Danjiankou-Hanjiang bridge in the south-to-north water diversion project with different girder closure sequence[C]//The 17th National Academic Conference on Structural Engineering, 2008.
[8]段斌.多跨长联连续梁桥合龙施工探讨[J].黑龙江交通科技, 2015(7):152.DUAN Bin. The discussion of girder closure on long construction of multi span continuous beam bridge[J].Communication Science and Technology Heilongjiang,2017(7):152.
[9]肖啸.基于不同施工进度下多跨连续梁桥合龙顺序的研究[D].长沙:中南大学, 2014.XIAO Xiao. Optimization of multi-span continuous beam closure sequences under the different construction progress[D]. Changsha:Central South University, 2014.
[10]何军.大跨连续刚构桥施工控制及合龙方案研究[D].西安:长安大学, 2011.HE Jun. The study of closure technics and construction control technology for long span continuous rigid-frame bridge[D]. Xi’an:Chang’an University, 2011.
[11]宋培浩.连续梁合龙顺序分析优化[J].工程技术,2015(8):54-57.SONG Peihao. The analysis and optimization of closure sequences on continuous beam[J]. Engineering Technology, 2015(8):54-57.
[12]郑斐.劲性骨架对悬臂施工桥梁合龙段影响分析[D].西安:长安大学, 2008.ZHENG Fei. The influence analysis of stiff skeleton on the closure section of the bridge by cantilever construction method[D]. Xi’an:Chang’an University,2008.
[13]施建振,虞建成,施为民.连续箱梁桥中跨合龙段劲性骨架优化设计[J].施工技术, 2004, 9(9):3-6.SHI Jianzhen, YU Jiancheng, SHI Weimin. Optimial design of the stiff skeleton at the locking section of the middle span of a continuous box beam brifge[J].Construction Technology, 2004, 9(9):3-6.
[14]尚晋,李东,李博强.悬浇梁合龙段劲性骨架结构分析[J].沈阳大学学报(自然科学版), 2013, 8(4):326-332.SHANG Jin, LI Dong, LI Boqiang. Analysis of the stiff skeleton at the closure section of the bridge by cantilever construction method[J]. Journal of Shenyang University(Natural Science), 2013, 8(4):326-332.