鸭池河特大桥钢桁梁安装交流介绍
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桥梁建设2017年第47卷第4期(总第245期)Bridge Construction, Vol. 47, No. 4, 2017 (Totally No. 245)107文章编号:1003 —4722(2017)04 —0107 —06贵黔高速鸭池河特大桥钢桁梁施工关键技术于祥敏1,陈德伟1,白植舟1,金兵2(1.同济大学桥梁工程系,上海200092; 2.中交路桥建设有限公司,北京100027)摘要:贵黔高速鸭池河特大桥为主跨800 m的钢桁一混凝土混合梁斜拉桥,中跨钢桁梁采 用“N”形桁架。
受地形、运输和工期等条件限制,该桥采用缆索吊机进行16 m长钢桁梁节段整体 悬臂拼装。
施工中,在边跨增设主动张拉的背索,以抵消缆索吊机对该桥变形的影响;优化接头处 高强螺栓施工的时间和顺序,以防止新节段安装时高强螺栓受剪;重视钢桁梁节段现场的预拼装、测量和误差调整工作,以确保16 m长节段拼装精度;采用等值张拉法和群锚千斤顶张拉,以实现 钢绞线斜拉索的索力均勾性和整体索力控制;优化斜拉索施工索力,以实现合龙口姿态的调整,采 用温度自然合龙法,以实现高精度合龙。
鸭池河特大桥合龙后主梁线形平顺,施工误差满足规范要 求,该桥已于2016年7月建成通车。
关键词:公路桥;斜拉桥;混合梁;钢桁梁;悬臂拼装法;缆索吊机;误差控制;合龙技术;桥梁施工中图分类号:U445. 466;U448. 27 文献标志码:AKey Techniques for Construction of Steel Truss Girder ofYachi River Bridge on Guiyang-Qian^i ExpresswayYU Xiang-min1 , CHEN De-wei1 , BAI Zhi-zhou1 , JIN Bing2(1. Department of Bridge Engineering, Tongji University, Shanghai 200092,China;2. Road Bridge International Co., Ltd., Beijing 100027, China)Abstract:The Yachi River Bridge on Guiyang-Qian^i Expressway is a steel truss and concrete hybrid girder cable-stayed bridge with a main span of800 m and over the main span,the part of the steel truss girder is the N-shape truss.Restricted by the conditions of the topography,transportation and construction time schedule of the bridge,the 16 m long segments of the steel truss girder were integrally cantileveredly assembled at the site,using the cable crane.In the construction,the temporary active tensioning backstays were added to the pylons on the side spans and were used to counteract the influences of the cable crane on the deformation of the truss girder.The construction time and sequences of the high-strength bolts at the joints of the segments were optimized so as to avoid the shear in the bolts as the new segments were being assembled.The special attention was paid to the site preassembling,survey and tolerance adjustment of the segments so as to ensure the assembling accuracy of the segments.The stay cables were tensioned,using the equivalence tensioning method and the group anchor jacks,so as to achieve the uniformity of the steel strand stay cable forces and the control of the whole cable forces.The stay cable forces in the construction were optimized so as to facilitate the adjustment of the state of the closure gap.The truss girder was closed,using the temperature natural closure method,so as to close the girder in high accuracy.The final alignment of the closed truss girder of the bridge was smooth,the construction tolerance could meet the relevant requirements in the codes and the bridge was completed and open to the traffic in Ju ly, 2016.收稿日期:2016 —11 一23作者筒介:于祥敏,博士生,E-mail:1510002@. cii。
世界桥梁 2021年第49卷第3期(总第212期)World Bridges , Vol. 49, No. 3, 2021 (Totally No. 212)51成贵铁路鸭池河特大桥主梁现浇弹性吊架设计与安装梁伟12(1.中铁大桥局集团有限公司,湖北武汉430050; 2.桥梁结构健康与安全国家重点实验室,湖北 武汉430034)摘 要:成贵铁路鸭池河特大桥主桥为主跨436 m 中承式提篮拱桥,拱上主梁为单箱三室预应力混凝土箱梁,分为两端边跨34 m 区域、两端中跨无吊杆32 m 区域、中跨有吊杆204 m 区域。
中跨有吊杆区域拱上主梁采用吊索多点弹性支撑满跨吊架技术进行施工,即利用接长主拱吊杆搭设满跨通长现浇吊架来浇筑拱上主梁混凝土&吊索弹性吊架由底模系统、承重系统、 预紧锁定结构、限位结构等组成,通过锚筋预张拉,实现拱上主梁与吊架端横梁预紧,完成节段预紧锁定;在端横梁上限位结构与拱上主梁之间抄紧,实现吊架横向限位,与承重系统和预紧锁定结构共同协作横向抗风;吊架和主体结构的设计和变形计算结果均满足要求&施工中,吊架吊装单元现场组拼后,利用缆索吊机起吊安装;通过节段预紧锁定、吊架预抛高及拱上主梁长节段对称浇筑等技术,控制主梁现浇线形;拱上主梁混凝土全部浇筑完成后拆除吊架&关键词:拱桥;箱形梁;预应力混凝土结构;现浇;吊索弹性吊架;结构设计;安装技术中图分类号:U448. 22;U445.4文献标志码:A 文章编号:1671 —7767(2021)03 —0051 —071 工程概况成贵铁路鸭池河特大桥主桥为有推力中承式 钢一混结合提篮拱桥「门。
大桥全长971 m,桥跨组 成为 8X32. 7 m 简支梁 + (32. 7 +2 X 61. 75) m T构梁+ 336 m 拱上主梁 + (2 X 61. 75 + 32. 7) m T 构梁+ 2X24.7 m 简支梁(见图1)。
桥梁建设2020年第50卷第5期(总第266期)16Bridge Construction,Vol.50,No.5,2020(Totally No.266)文章编号!003—4722(2020)05—0016—06成贵铁路鸭池河特大桥主桥施工技术李艳哲12(1.中国中铁大桥局集团有限公司,湖北武汉430050;2.桥梁结构健康与安全国家重点实验室,湖北武汉430034)摘要:成贵铁路鸭池河特大桥为主跨436m的钢一混凝土结合拱桥,两拱肋和交界墩采用一体式拱座基N,拱肋采用钢桁一混凝土结合结构,主梁采用单箱三室预应力混凝土结构。
拱座采用分台阶斜向推移式连续浇筑工艺施工;拱座先预留锚栓区,拱脚节段整体在支架上精定位后,锚栓区与拱座混凝土一起浇筑;拱肋节段利用缆索吊机起吊,斜拉扣挂法安装,拱段在组拼场内和拱顶二次横移到位,施工时增设了临时抗风横联;双侧拱肋采用大节段同步配切合龙技术合龙;拱肋外包段混凝土从下往上分两环、逐段施工,结合段混凝土采用分节段现浇施工,施工时保留部分扣索、锚索,并二次张拉;有吊杆区长204m主梁采用分节段全吊架法施工。
关键词:铁路桥;拱桥;钢一混凝土结合拱;整体定位;合龙;外包;全吊架法;施工技术中图分类号:U44&22;U445.4文献标志码:AKey Construction Techniques for Main Bridge of YachiRiver Bridge on Chengdu-Guiyang RailwayLI Yan-zhe1'2(1.China Railway Major Bridge Engineering Group Co..Ltd..Wuhan430050,China; 2.State KeyLaboratoryforHealthandSafetyofBridgeStructures#Wuhan430034#China)Abstract:The Yachi River Bridge on Chengdu-Guiyang Railway is a steel-concrete composite arch bridge spanning436m.The arch seats act as integral foundations for the arch ribs and juncturepiers.Thearchribsaresteeltruss-concretecompositestructures#andthe main girder consists of prestressed concrete boxes with three ce l s.The arch seat was continuously cast like forming a staircase structure and obliquely progressed.Anchoragezone was first reserved on the archseat#aftertheaccuratepositioningofarchspringsegmentsintegra l yonthesca f olds#the anchoragezonewascasttogetherwiththeconcretingofthearchseats.Thearchribsegmentswere hoisted by cable cranes#and insta l ed into position by a stay cable fastening system.The arch segmentsintheassembly yard andthearch crown segment were movedinto position aftera second-roundtransverse movement.Duringtheconstruction process#temporary wind-resistant lateralbracingswereadded.Thelargeclosuresegmentsforthetwoarchribs wereloweredinto position by the matching and cu t ing technique.The concrete encasing the arch ribs were cast in tworings(anupperringandalowerring)andsegmentbysegment.Theconcreteinthejoint segment was cast in sections#somefastening stays and anchor cables were remained in the constructionprocess#andthehangershadtoexperiencesecond-roundtensioning.The204m-long maingirderwithhangerswereerectedsegmentbysegmentusingafu l setofliftingframe.收稿日期:2019—03—26基金项目:中铁大桥局集团有限公司科学技术研究与幵发项目(2014—03—重大,2017—04—重点)ProjectsofScienceand Technology Researchand DevelopmentofChina Railway MajorBridgeEngineering Group Co.Ltd.2014-03-KeyProject2017-04-KeyProject)作者简介:李艳哲,教授级高工,E-mail:29239015@ Q研究方向:桥梁施工及施工结构设计。
世界桥梁2016年第M 卷第4期(总第182期)71贵黔高速鸭池河大桥主梁结构受力行为分析吴游宇\邓淑飞2(1.中交第二公路勘察设计研究院有限公司,湖北武汉430056;2.国家林业局昆明勘察设计院,云南昆明650216)摘要:贵黔高速鸭池河大桥采用主跨800 m 的钢桁一混凝土梁混合梁斜拉桥,主跨主梁为正交异性钢桥面板结合钢桁梁,边跨主梁为预应力混凝土边箱梁,主跨钢桁梁与边跨混凝土箱梁间采用钢箱过渡。
为明确大跨度混合梁斜拉桥主梁受力特 点,确保结构安全,对该桥主梁结构进行整体计算,并对其重点部位进行局部应力分析。
计算结果表明:主梁结构整体刚度 大,各项设计计算指标均满足规范要求,局部构造受力性能佳;该类型主梁能适应类似的主跨大、边主跨比小的混合梁斜拉桥 体系。
关键词:斜拉桥;钢桁梁;混合梁;正交异性钢桥面板;有限元法;应力;刚度中图分类号:U448. 27;U441. 5文献标志码:A文章编号:1671 — 7767(2016)04 — 0071 — 051 工程概况贵黔高速鸭池河大桥是贵阳至黔西高速公路上的一座控制性桥梁工程[1],为主跨800 m 的双塔双 索面半飘浮体系混合梁斜拉桥,跨径布置为(7 2十 72 + 76 + 800 + 76 + 72 + 72) m ,是目前世界上跨度 最大的钢桁一混凝土梁混合梁斜拉桥(见图1)。
主 跨主梁为正交异性钢桥面板结合钢桁梁,边跨主梁 为预应力混凝土边箱梁,主、边跨采用钢箱过渡。
主 梁在桥塔下横梁、辅助墩处设置多向(双向)球型钢 支座,过渡墩处设置1个单向活动支座和1个双向 活动支座,桥塔处设横向抗风支座,每个塔梁连接处 顺桥向安装4套粘滞阻尼器。
该桥主要技术标准有:双向4车道高速公路,路基宽24. 5 m ,设计车速80 km /h ,公路一I 级荷载 等级,设计地震基本加速度〇. 〇54g ,设计基本风速 25. 2 m /s ,设计基准期100年。
贵黔高速鸭池河特大桥钢桁梁合龙施工控制技术于祥敏;陈德伟【期刊名称】《桥梁建设》【年(卷),期】2017(047)006【摘要】The Yachi River Bridge on Guiyang-Qian′xi Expressway is a hybrid girder cable-stayed bridge with the main span of 800 m.The main span of the bridge is the steel truss girder w hile the side spans are the prestressed concrete box girders.T he steel truss girder of the main span was integrally cantileveredly assembled segment by segment,using the cable carne and was finally closed,using the natural closure method.In the construction of the bridge,the method of optimizing the tensioning forces of the stay cables was used to fulfill the adjustment of the closure gap,that was,the stay cables No.22~24 were respectively tensioned to the 70%,60% and 50%of the cable forces of the completed bridge and after the truss girder was closed,the supplementary tensioning of the cables was then carried out so as to accommodate the closure alignment require-ment.T he spacing,level,axial lines,atmospheric temperatures and the chord temperatures of the closure gap were observed continuously for 48h and the closure temperature and placement temper-ature of the closure segment w ere determined to be respectively 17°C and 19°C.T he match cut-ting length of the chords on the upstream and downstream sides was respectively 8 114 mm and 8 136 mm.The closure segment was fixed,usingthe temporary supports of the steel pipes and I-steel so as to prevent deformation of the segment in the transportation and installation.The bridge presently has been closed in high accuracy.The alignment of the closed main girder is smooth and the tolerances can satisfy the relevant requirements in the codes.%贵黔高速鸭池河特大桥为主跨800 m的混合梁斜拉桥,中跨为钢桁梁,边跨为预应力混凝土箱梁.该桥采用缆索吊机进行钢桁梁节段整体悬臂拼装施工,中跨钢桁梁采用自然合龙法施工.施工中,采用优化斜拉索张拉索力的方法实现合龙口姿态的调整,即对22~24号斜拉索分别按70%、60% 和50% 的成桥索力张拉,合龙后再补张拉,以满足合龙线形要求;对钢桁梁合龙口的间距、标高、轴线、气温和弦杆温度等进行48 h连续观测,确定合龙段的合龙温度和放置温度分别为17 ℃和19 ℃,上、下游弦杆的配切长度分别为8114 mm和8136 mm;采用钢管和工字钢等临时支撑固定合龙段,以防止其运输和吊装过程中变形.该桥已完成高精度合龙,合龙后主梁线形平顺,误差满足规范要求.【总页数】5页(P101-105)【作者】于祥敏;陈德伟【作者单位】同济大学桥梁工程系,上海200092;同济大学桥梁工程系,上海200092【正文语种】中文【中图分类】U448.27;U445.46【相关文献】1.成贵铁路五通岷江特大桥钢桁梁合龙施工关键技术 [J], 张建金2.贵黔高速鸭池河特大桥缆索吊机荷载试验研究 [J], 于祥敏;陈德伟3.成贵铁路贵州鸭池河特大桥r钢桁拱肋顺利合龙 [J], 尹光顺;陶路4.贵黔高速鸭池河特大桥钢桁梁施工关键技术 [J], 于祥敏;陈德伟;白植舟;金兵5.贵黔高速鸭池河特大桥施工控制 [J], 于祥敏;陈德伟因版权原因,仅展示原文概要,查看原文内容请购买。
向别人介绍贵州鸭池河大桥的作文在贵州的大地上,有一座让人惊叹不已的大桥——鸭池河大桥。
这座桥啊,可真是个了不起的存在!我第一次亲眼见到鸭池河大桥的时候,被它那雄伟的身姿给震撼得说不出话来。
那天,天气特别好,蓝天白云下,大桥就像一条巨龙横跨在鸭池河上。
我站在远处的山坡上,远远地望着它,心里充满了好奇和期待。
我迫不及待地走近它,想要好好看看这座神奇的大桥。
当我真正站在桥底下的时候,那种震撼的感觉更加强烈了。
巨大的桥墩高高耸立,仿佛要直插云霄。
桥身的钢铁结构密密麻麻,交织在一起,充满了力量感。
我抬头往上看,脖子都酸了,还看不到桥顶。
我顺着引桥慢慢地走上了大桥,脚下的路面平坦而宽阔。
桥上的车辆来来往往,川流不息。
我靠在桥边的栏杆上,往下看去,只见鸭池河的河水在桥下奔腾流淌。
河水碧绿碧绿的,打着漩涡,发出“哗哗”的声响。
远处的山峰连绵起伏,和这座大桥相互映衬,构成了一幅绝美的画面。
桥上的风呼呼地吹着,把我的头发都吹乱了。
我闭上眼睛,感受着这风,心里特别舒畅。
这时候,旁边走过一群游客,他们一边走一边兴奋地说着话。
一个大叔大声说道:“这桥建得可真牛啊!以前要绕好大一圈才能过去,现在可方便太多啦!”一个阿姨接着说:“可不是嘛,听说这桥的建造难度可大了,咱们国家的工程师真是厉害!”我听着他们的话,心里也不由得升起一股自豪感。
我继续往前走,仔细观察着桥上的每一个细节。
桥面上的标线清晰可见,路边的路灯整齐排列。
还有那些防护栏,做得又结实又美观。
走着走着,我看到了一块介绍牌,上面写着鸭池河大桥的各种数据和建造过程。
原来,这座桥全长一千多米,主跨达到了八百米,是世界上最大跨径的钢桁梁斜拉桥之一。
在建造过程中,工程师们克服了无数的困难,采用了各种先进的技术和工艺。
看着这些介绍,我对这座桥的敬佩之情又增添了几分。
走到桥的中间,我停了下来,望着远处的风景。
阳光洒在河面上,波光粼粼,就像无数颗星星在闪烁。
河岸两边是茂密的树林,绿色的树叶在风中摇曳,仿佛在向这座大桥致敬。
2023/06总第568期山区大跨径长节段钢桁梁拼装方案优化及快速拼装施工技术孙战赢(中交一公局第九工程有限公司,广东广州 511300)[摘要]鸭池河大桥为双塔双索面正交异性钢桥面板结合钢桁梁斜拉桥,主跨钢桁梁长800m,采用N形桁架结构。
桥址处于深切峡谷中,瞬时风力可达11级,且场地极为狭窄,给钢桁梁拼装等施工组织带来极大的挑战。
为选取合适的钢桁梁拼装方案,文章对桥面回转吊机拼装方案和缆索吊悬臂拼装方案进行了安全、技术、经济等多方面比选分析,确定了采用350t缆索吊悬臂拼装钢桁梁方案,对主梁拼装重量、拼装场地、主梁高栓平台等进行了优化,并论证了钢桁梁快速施工技术,为山区大跨径斜拉桥长节段钢桁梁施工提供了参考和借鉴。
[关键词]大跨径;钢桁梁;缆索吊;快速拼装[中图分类号]U445 [文献标识码]B [文章编号]1001-554X(2023)06-0045-04Rapid assembly construction technology of long section steel truss beams of long span cable-stayed bridge in mountainous areaSUN Zhan-ying我国钢结构桥梁建设要追溯至20世纪80年代,因其材料高强匀质性、良好的抗震性以及较好的韧性和延性等特点,被越来越多设计师们所青睐。
早期钢桁梁杆件连接为铆接结构,如外白渡桥、成昆铁路迎水村大桥。
随着钢桁梁结构材料性能、制作工艺及施工技术的进步,钢桁架进一步发展为栓焊结构和全焊结构,设计师们设计并建成了一大批结构新颖、技术复杂、设计和施工难度大、现代化品位和科技含量高的大跨径钢结构桥梁,如平潭海峡公铁两用大桥[1]、上海闵浦二桥[2]、九江长江大桥、芜湖长江大桥等[3]。
钢桁梁也从单根杆件散拼安装施工发展为大节段整体预制后整节段施工,施工环境和技术要求日益苛刻,给桥梁建设质量、安全、工期等带来了新的挑战。