西成客专预应力混凝土简支箱梁桥梁体徐变研究  

作　　者：王熙文 李振忠 

机构地区：[1]中国铁路西安局集团公司西安高铁基础设施段,陕西西安710054

出　　处：《科技创新与应用》2021年第29期54-56,共3页Technology Innovation and Application

摘　　要：高速铁路桥梁徐变导致轨道出现连续周期性高低不平顺的现象,影响行车舒适性、安全性。文章以西成高铁某段预应力混凝土简支箱梁桥上线路因桥梁徐变出现二级车载为背景,采用轨道精调的方式对桥梁徐变区段线路进行现场整治,经过分析、对比精调前后线路动态质量,对梁体徐变进行简要研究。经研究发现,该预应力混凝土简支箱梁桥梁端徐变效果明显;桥梁徐变是一个长期发展的过程,需要长期监测;轨道精调是整治桥梁徐变的有效途径。The creep of the high-speed railway bridge leads to the continuous periodic irregularity of the track,which affects the driving comfortability and safety.Based on the second-class vehicle load on the prestressed concrete simply-supported box girder bridge of a section of Xicheng High-speed Railway due to bridge creep,this paper adopts the way of track fine adjustment to renovate the line in the creep section of the bridge,and conducts a study on the beam creep after analyzing and comparing the dynamic quality of the line before and after fine adjustment.Through the study,it is found that the creep effect of the end of the prestressed concrete simply-supported box girder bridge is obvious;bridge creep is a long-term development process,which needs long-term monitoring;and track fine adjustment is an effective way to control bridge creep.

关 键 词：高速铁路 桥梁徐变 现场试验 轨道精调 轨道高低不平顺 

分 类 号：U24[交通运输工程—道路与铁道工程]