短线预制箱梁节段线形误差的改进调整法  

Improved adjustment method for linear error of precasting segmental box girder by short-line match method

作　　者：周凌宇[1] 郑恒[1] 侯文崎[1] 尹国伟[1] Zhou Lingyu Zheng Heng Hou Wenqi Yin Guowei(School of Civil Engineering, Central South University, Changsha 410075, China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075

出　　处：《华中科技大学学报（自然科学版）》2016年第9期99-104,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51578546);高速铁路基础研究联合基金资助项目(U1434204)

摘　　要：针对短线预制箱梁节段匹配误差调整中存在的不足,提出一种考虑两坐标系(预制整体坐标系和局部坐标系)空间位置不重合的改进方法,以某在建城市高架轨道交通4×40m连续刚构桥为例进行误差调整分析.基于空间坐标变换的基本原理,将预制局部坐标系中的误差变换到整体坐标系中,提出改进的梁段平面轴线、立面高程误差修正方法,消除了在整体坐标系中直接调整局部坐标系中的误差所造成的影响.研究结果表明:该方法计算的预制线形和理论匹配位置都满足控制要求;相比已有调整方法,其可以考虑两坐标系空间位置不重合的情况,且计算简单、物理意义明确、线形控制精度更高.In view of the shortage of the matching error adj ustment of precasting segments in short-line match method,an improved method was proposed,considering the misalignment for the spatial location of two coordinate system （prefabricated global coordinate system and local coordinate sys-tem）.A 4＆#215;40 m span continous rigid frame bridge of urban elevated rail transit during construction was cited as an example to analyze error adj ustment.Based on the principles of spatial coordinate transformation,the error in the prefabricated local coordinate system directly transformed into the global coordinate system.An improved method whose prefabricated error of segmental beam′s axis and elevation was proposed,since there are some error in the course of the prefabricated error in the local coordinate system directly being superposed in the global coordinate system.The results of the analysis show that the prefabricated line and the theoretical matching position calculated by this im-proved method is controlled within the error limits.Comparing with those already existing methods, the improved method can consider the misalignment of two coordinate system,simplify calculation and has higher precision of the linear control.

关 键 词：短线法 梁段预制 预制线形 几何控制 坐标变换 误差调整 

分 类 号：U239.5[交通运输工程—道路与铁道工程] U24