地铁调线调坡工程治理实践研究
Research on the practical engineering control of route and grade alignment for metro
张奔 1田苗盛1
作者信息
- 1. 中国铁路设计集团有限公司,天津 300251
- 折叠
摘要
调线调坡是地铁施工、运营阶段为解决平纵断面偏差的工程治理方法.文章通过工程实例分析主动、被动2种调线调坡方法,总结提出调线调坡设计流程,对地铁施工中发生严重侵限时采用的线路调整方案做出方案分析,并得出以下结论:调线调坡设计时通过适当增加结构尺寸,留足100 mm施工误差,可以在轨道减振地段大幅度减少工程侵限风险;车站、运营区间发现大范围侵限或集中的侵限突变时,需对特殊断面以环宽为单位加密测量,避免侵限点遗漏;施工测量中如发现侵限过大,施工方应避免自行调整纠偏,以防造成洞体严重侵限突变;圆形盾构区间减振轨道铺设地段需严格保证轨道结构高度,同时考虑土建施工正误差影响,建议设计时对结构底板进行下沉预留,满足轨道铺设条件.通过研究,文章介绍的方法可在地铁工程建设、运营阶段发生类似问题时提供参考.
Abstract
Route and grade alignment is an engineering treatment method used to solve the deviation of horizontal and vertical sections during the construction and operation stages of rail transit.The article analyzes two methods of route and grade alignment,active and passive,through engineering examples,summarizes and proposes the design process of route and grade alignment,an alyzes the line alignment plan adopted when serious limit beyond occurs in metro construction,and draws the following conclusion:by appropriately increasing the structure dimensions and sufficiently reserving 100 mm for construction error,that the risk of engineering limit beyond can be greatly reduced in the track vibration reduction sections during route and grade alignment design;When a large-scale or concentrated beyond limit is found in a station or operating section,special sections need to be measured intensively in units of its ring width to avoid missing limit beyond points;If excessive beyond limit is found during construction measurement,the construction units should avoid self alignment and correction to prevent serious limit beyond increasing of the tunnel body;The installation of vibration reduction tracks in circular shield tunnel sections must strictly ensure the height of the track structure,while considering the impact of civil construction positive errors.It is recommended to reserve the sinking of the structure bottom plate during design to meet the conditions for track installation.Through research,the methods introduced in the article can provide reference for similar issues that occur during the construction and operation stages of metro engineering.
关键词
地铁/调线调坡/线路设计/工程治理Key words
metro/route and grade alignment/track alignment design/engineering control引用本文复制引用
基金项目
中国铁路设计集团有限公司科技开发课题(2022A02158005)
出版年
2024
NETL
NSTL
万方数据