铁道科学与工程学报2018，Vol.15Issue(7)：1738-1746,9.DOI:10.19713/j.cnki.43-1423/u.2018.07.015
大曲率短线匹配连续刚构桥空间几何线形控制
Spacial geometric alignment control for short-line matching continuous rigid frame bridge with large curvature
摘要
Abstract
Aiming to the geometric alignment control of short-line matching continuous rigid frame bridge with large curvature, based on the space coordinate system, considering the length and the angle error of the segment girder, the transverse grade error and the translation error, a type of 3D geometric alignment control method was proposed. The method is applicable to both straight and large curvature precasting and assembling bridges. Through this method, the error accumulation could be avoided and the precasting and assembling alignment of each segment could be modified in time, thus the high precision geometric alignment control could be realized. Comparing the results obtained from the proposed method and the existing method, the former reflects the facts that the relative position relationship between the cast-in-place segmental girder and the corresponding matched segmental girder would keep unchanged during the procedure. Therefore, the alignment control accuracy could be guaranteed. Applying the proposed method to the practical engineering example, a short-line matching continuous rigid frame bridge with small radius curve (804.2 m), the alignment control effects are satisfactory. Comparing the actual measured and the designed alignments, the axis deviation is no more than 6mm and the height deviation is no more than 11 mm, both of them are far less than the limiting value in the corresponding codes. Thus, the correctness and accuracy of the proposed geometric control method are verified.关键词
几何线形控制/大曲率/短线匹配/误差/修正Key words
geometric alignment control/large curvature/short-line matching method/error/correction分类
建筑与水利引用本文复制引用
罗锦,侯文崎,崔大鹏..大曲率短线匹配连续刚构桥空间几何线形控制[J].铁道科学与工程学报,2018,15(7):1738-1746,9.基金项目
国家自然科学基金青年科学基金资助项目(51208513) （51208513）
中铁五局科技计划资助项目(ZTWJ-广铁(2014)018号) （ZTWJ-广铁(2014）
中南大学研究生自主探索创新资助项目(2016zzts422) （2016zzts422）
