2010年10月第39卷第10期
施工技术
CONSTRUCTION TECHNOLOGY
钢管混凝土刚性系杆拱桥施工监控技术
王治均’李年维沈超明’李三珍
（1.江苏科技大学土木工程与建筑学院江苏镇江212003； 2.上海林同炎李国豪土木工程咨询有限公司上海200092)
[摘要］尼尔森体系钢管混凝土刚性系杆拱桥能提供较大的纵向刚度、良好的动力性能来满足铁路重载和高速运行的要求。某桥采用先拱后梁、系梁悬臀现浇方法施工·重点阐述了在各个施工阶段拱肋及系梁控制截面的施工监控要点拱脚位移监测、吊杆力监测及基础沉降监测方法并对系染线形、拱助及系染关键截面处应力误差提出
预警机制及调整原则确保施工精度从而使工程施工质量满足设计和施工规范要求，[关键词]刚性系杆拱桥：钢管混凝土先拱后梁：尼尔森体系：施工监控
[中图分类号】U445;U448.22
[文献标识码]A
[文章编号】1002-8498(2010)10-0063-04
ConstructionMonitoringforConcrete-filledSteel
Tube Rigid Tied Bar Arch Bridge
Wang Zhijun', Li Nianwei', Shen Chaoming'Li Sanzhen
( 1. School of Cizil Engineering and Architecture , Jiangsu U/nirersity of Science and Technology ,
Zhenjiang , Jiangsu212003 China;
2. Lin Tung-yen & Li Guo-hao Consultants Lid. , Shanghai , Shanghai 200092 , China)
Abstract: Nielsen system concrete-filled steel tube rigid tied bar arch bridge can meet the demands of heavy haul railway and high speed with large longitudinal stiffness and superior dynamic performance. The bridge adopts the construction method of arch first and beam later and cantilever construction technique for tied girder. Key points of construction monitoring on arc-rib and tied girder controlling sections at every construction stage , monitoring methods of arch-foot displacement , hanger force , and base subsidence were described. The errors and the adjustment measures about alignment of tied girder and stress of tied girder and arc-rib at controlling sections were proposed to assure construction precision and to meet the reguirements of the design and construction code
Key words: rigid tied bar arch bridge; concrete-filled steel tube; arch first and beam late; Nielsen system; construction monitoring
1工程概况
本桥为高速铁路桥梁采用钢管混凝土系杆拱桥，计算跨径96m桥长100m桥梁全宽17.1m。主桥系杆拱拱轴线线形为悬链线拱肋平面内矢高19.2m，失跨比1/5。主桥总体布置如图1a所示。
钢管混凝士拱助截面为哑铃形高3.0m沿程等高布置由2根外径100cm壁厚16mm钢管卷制而成中间以16mm厚缓板连接构成,每隔一段距离在两腹板间焊接拉筋。拱肋钢管采用Q345-D钢钢管内灌注 C55无收缩混凝士拱助上横向设置3道“K"形风撑，风撑用Q235钢。拱肋截面如图1b所示。
系梁按整体箱形梁布置，采用单箱三室预应力混凝土截面。吊点处设横梁厚0.4~0.6m。系梁内设
63
16根19-7Φ5环氧钢绞线系杆，锚固在系梁梁端实体段系杆箱内。同时系梁纵向设62束12-7$5预应力筋及4束4-75预应力筋横向在底板上设3-7$5横向预应力筋横隔板上设4束9-7$5预应力筋。系梁尺寸及系杆位置如图2所示。
吊样布置采用尼尔森体系该体系拱桥能提供较
大纵向刚度具有良好的动力性能来满足铁路重载和高速运行的要求。吊杆间距为8m两交叉吊杆之间的
[收稿日期】2009-12-01；【修订日期】2010-03-44
【基金项目】江苏省自然科学基金资助项目（BK2009723)；江苏科技大学舶舶与海洋工程学院青年基金资助项目( 2005 CH031J)
[作者简介】王治均江苏科技大学土木工程与建筑学院讲师，江苏省镇江市梦溪路2号土建学院115号信籍212003，电话： 13952882410 ,E-mail: zhishi6598@ 163. com