重庆红岩村嘉陵江大桥索塔钢锚箱安装测量定位控制技术  

Techniques for Installation,Measuring and Positioning Control of Steel Anchor Boxes in Pylons of Jialingjiang River Bridge in Hongyan Village

作　　者：刘康 邢惟东 曾远 殷文斌 LIU Kang;XING Wei-dong;ZENG Yuan;YIN Wen-bin(China State Construction Bridge Corp.,Ltd.,Chongqing 402260,Chin)

机构地区：[1]中建桥梁有限公司,重庆402260

出　　处：《世界桥梁》2018年第4期36-41,共6页World Bridges

摘　　要：重庆红岩村嘉陵江大桥为高低塔双索面公轨两用钢桁梁斜拉桥,索塔斜拉索锚固采用钢锚箱形式。钢锚箱为箱形结构,最大节段尺寸为6.2m×2.2m×3.0m(长×宽×高),节段最重达26t,吊装高度达160m。首节钢锚箱索导管长达8m,跨越塔柱2个浇筑节段(标准节段高6m)。针对钢锚箱体积大、重量重、吊装高度高和首节钢锚箱索导管超长的特点,采用专用起重设备吊装钢锚箱节段,首节钢锚箱与索导管分离安装,首节钢锚箱索导管通过空间位置放样、初定位、精密定位确保三维坐标精度,采用L10角钢进行加强以防首节钢锚箱变形,剩余节段钢锚箱安装采用导向装置就位。施工中严格控制每节段钢锚箱的平面位置、高程、倾斜度、顶面平整度,实现了钢锚箱安全、优质、快速的施工目标。The Jialingjiang River Bridge in the Hongyan Village, Chongqing, is a rail cure road steel truss girder cable stayed bridge with double cable planes. The two pylons of the bridge have different heights. The stay cables were anchored to the pylons by the steel anchor boxes and the maximum sectional dimension of the anchor box is 6.2 m by 2. 2 m, and 3.0 m in height. The heaviest section weighs up to 26 t and needs a lifting height of 160 m. The cable conduit in the first section of the steel anchor box is 8 m long, which spans two casting sections of the pylon columns （a standard pylon section is 6 m long）. Due to that the steel anchor box is hefty, the lifting height excesses the conventional height and the cable conduit in the first steel anchor box section is very long, the specialized lifting equipment was used to lift and install the sections of the steel anchor box. The first section of the steel anchor box and the cable conduit were installed separately. To ensure the three dimensional coordinate precision of the first section of the steel anchor box, a se ties of measures were taken, including the conduction of the spatial location lofting, rough positio ning and precise positioning. The first section of the steel anchor box was strengthened by the L10 angle steel to prevent deformation. The remaining sections were installed into place with the aid of guiding devices. The plan location, elevation, inclination, top surface flatness of each section of the steel anchor box was strictly controlled, the goal of safe and rapid construction of the steel anchor box was realized, and the construction quality was qualified.

关 键 词：公轨两用桥 斜拉桥 钢锚箱 索导管 定位 测量 安装 施工技术 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U445.4[交通运输工程—道路与铁道工程]