沪苏通长江公铁大桥塔梁同步施工线形测量技术  

Alignment Measurement Technology for Synchronous Construction of Plyon and Girder of Shanghai-Suzhou-Nantong Yangtze River Rail-cum-Road Bridge

作　　者：顾惠明[1] GU Huiming(China Railway Major Bridge Engineering Group Co.Ltd.,Wuhan 430050,China)

机构地区：[1]中铁大桥局集团有限公司,武汉430050

出　　处：《铁道建筑》2022年第11期90-94,共5页Railway Engineering

摘　　要：以沪苏通长江公铁大桥主航道桥塔梁同步施工为工程背景,介绍了施工阶段超高主塔及大悬臂钢梁线形测量重难点和塔梁同步施工线形测量实施路线。从测量控制网的建立、塔偏测量施工控制点布置与坐标推算、主塔远距离测量和基于图像识别的塔偏测量四个方面介绍了主塔线形监测方法,从大节段钢梁悬臂架设、合龙阶段梁段三桁上下弦轴偏和合龙口姿态测量两个方面介绍了钢梁线形测量方法。最后通过实测数据验证了塔梁同步施工线形测量技术的可靠性。Taking the synchronous construction of plyon and girder of the main channel bridge of Shanghai-SuzhouNantong Yangtze River rail-cum-road bridge as the engineering background,this paper introduced the key and difficult points in the alignment measurement of the super high main plyon and large cantilever steel girder during the construction phase and the implementation route of the alignment measurement of the plyon and girder during the synchronous construction.This paper introduced the main plyon alignment monitoring method from four aspects of the establishment of measurement control network,plyon deviation measurement construction control point layout and coordinate calculation,remote measurement of the main plyon and plyon deviation measurement based image recognition,and introduced the steel girder alignment measurement method from two aspects of axial deviation of upper chord and lower chord of three trusses of girder segment in cantilever erection stage and closure stage of large segment steel girders and closure posture measurement.Finally,the reliability of alignment measurement technology for plyon and girder synchronous construction was verified by the measured data.

关 键 词：公铁两用桥梁 塔梁同步施工 测试分析 线形测量 桥塔 钢梁 塔偏 轴偏 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]