2010年2月第39卷第2期
施工技术
CONSTRUCTION TECHNOLOCY
宜兴荆邑大桥双套拱塔液压同步竖转提升施工
陈杰，程春阳
（上海同济宝冶建设机募人有限公司，上海200433）
[摘要】宜兴删邑大桥主桥跨径173m，桥宽58.5m/51m。主桥桥塔结构体系为双套拱塔结构。由于其独特的结构造型及现场施工条件的限制，拱桥安装采取在桥面上平面拼装，同步整竖转提升，先利用临时塔架竖转提升主塔，然后利用安装好的主塔作为承重结构，同步竖转提升安装副塔的安装施工工艺。通过对临时结构的设计提出较高要求，保证提升竖转过程中的同步控制精度。同时通过采取有效措施，防止由于竖转的角度过大而导致倾覆的危险。【关键调】桥架工程；液压提升；同步控制；桥塔；竖转
【中图分类号】U445
【文献标识码］A
【文章编号】1002-8498(2010)02-0051-03
Hydraulic SynchronizedVerticallyRotatingElevationConstructionof
Double-layer Arch Tower of Jingyi Bridge in Yixing
Chen Jie, Cheng Chunyang
(Shanghai Tongji Baoye Construction Robot Co, , Lad., Shanghai 200433, China)
Abstract : The master bridge of Jingyi Bridge in Yixing is 173 meters in span diameter, 58. 5 meters or 51 meters in bridge width. Due to its unique structure model and restriction of on-site construction condition, arch bridge is installed by patchwork parallel over the bridge surface, synchronized vertically rotating elevation. First step is vertically to elevate the master tower by means of a makeshift tower stand, and second step is by means of the construction technology, which can synchronized vertically elevate and install the slave tower, it is done on the load-bearing structure based on the installed master tower. By strict requirements on the design of the makeshift structure, the precision synchronized control is ensured in the process of vertically elevation. In the meanwhile, the risk of capsize is prevented by effective measures if the vertically rotating angel is too wide.
Key words : bridge engineering;hydraulic elevation;synchronized control; bridge tower;vertically rotating
1工程概况
宜兴市荆邑大桥主桥采用双套拱斜拉桥形式，跨径173m，主要包括双套拱塔和桥面钢箱梁。桥面钢箱梁在主塔以北为51m宽的整体钢箱梁，主塔区钢箱梁
加宽到58.5m。主塔以南分为三幅桥，其中主线为 27m宽的预应力混凝土桥，两侧为宽度11m的钢箱染辅道。双套拱塔分为主副塔，主塔整体线形为两段直线段+两段椭圆弧线段组成，整体呈倒U形，塔高 73.6m，倾角8°，塔底跨距49m，主塔截面尺寸为4.0m x3.5m。副塔结构整体线形同主塔，塔高61.7m，塔底跨距26.5m。副塔钢箱梁截面尺寸为3.5m×3.0m。主副塔之间通过钢拉杆连接，由下至上设置26道 400mm×600mm矩形装饰横撑；主副塔上共设16对斜拉索。其桥型布置如图1所示。
2施工方案万方数据
E土
宣兴荆宜大桥立体示意
图1：
Fig.1Jingyi Bridge in Yixing
51
由于大桥特殊的结构造型及现场施工条件的限制，常规脚手架散拼的安装方法存在较大困难：①脚手架的高度约70m，长度约55m，脚手管的用量极大；②
【收稿日期】2009-07-29
【作者简介】陈杰，上海同济宝冶建设机器人有限公司工程师，上海市宝山区泰和路1400号2号门201901，电话：（021） 56674729,E-mail :jiechen9929@ 163.com