采用钢内导管的斜拉桥索导管精确定位技术研究

发布时间：2018-01-14 09:42

本文关键词：采用钢内导管的斜拉桥索导管精确定位技术研究　出处：《世界桥梁》2015年05期 　论文类型：期刊论文

【摘要】：为提高斜拉桥索导管空间定位的精度,进一步推动测量定位技术的实用化,对采用钢内导管装置的斜拉桥索导管精确定位技术进行研究。钢内导管是由一根半圆柱体形状的细长轴(中心线处开有微小V形槽)相连双半圆法兰盘的一种装置,其中一端与半圆法兰盘平齐,另一端穿过半圆法兰盘。斜拉桥索导管定位时,在初步定位的基础上,将钢内导管穿入索导管中,利用钢内导管将出塔点坐标和理论锚点坐标由虚点转化为实点,对索导管进行直接精确复测定位,再利用两坐标点所在空间直线方程对实测点进行判别。将该技术应用于台州市椒江二桥上,实践结果表明该技术能简单快速地实现斜拉桥塔端索导管的精确定位,精度能达到5mm以内。
[Abstract]:In order to improve the spatial location of the cable-stayed bridge cable conduit precision measurement technology further promote the practicability of the cable-stayed bridge cable duct positioning technology for steel tube device is studied. The steel tube is composed of slender shaft of a semi cylindrical shape (the center line is opened at the micro V slot) a a device connected double semicircle flange, one end of the flange and semi flush, the other end through the semicircle flange. The cable duct positioning of cable-stayed bridge, based on preliminary positioning, the steel inner catheter into the cable duct, using steel catheter will be out of the tower point coordinates and the coordinates by the virtual anchor theory point into reality, on the cable duct directly and accurately retest positioning, using two point linear equation where the space of the measured point discrimination. This technology is applied to the city of Taizhou Jiaojiang bridge, the practice shows that this technique can easily and quickly. The accurate positioning of the cable ducts at the end of the present cable-stayed bridge tower can reach less than 5mm.

【作者单位】：中铁大桥局集团桥科院有限公司;中交路桥建设有限公司;安徽省交通控股集团有限公司;
【分类号】：U445.4
【正文快照】： 1引言塔柱索导管定位施工属于高空作业,施工空间狭小,尤其是斜塔柱,另外在塔柱施工中钢筋、劲性骨架、环向预应力、其它预埋件及索导管的制造误差、运输发生的局部变形以及温度等因素的影响,无疑增加了索导管精确定位的难度[1]。目前索导管定位采用先由出塔点坐标和理论锚点坐

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