儿童图画故事文章编号：1009-4539 (2020) 09-0088-03•桥梁工程•
谢以顺
(中铁二十四局集团江苏工程有限公司江苏南京210028)
摘要：为了解决跨越既有轶路桥梁施工中施工空间狭小、施工干扰大及既有线施工封锁时间短等问题，针对夹北 线大山一号、二号特大桥改建工程跨越京沪铁路48 m钢桁架施工，提出了一种少支架大跨径整体横向拖拉施工方 法，从而避免了支架搭设、拆除等大范围、长时间的既有线施工作业，减少了对既有京沪铁路的影响，降低了大型临 时设施的施工投入。采用有限元软件，对横向拖拉滑移过程中的整体拖拉支架及滑道梁进行了受力分析，结果表 明整体横向拖拉支架及滑道梁的应力和变形均满足施工要求，并通过滑道梁现场应力监测结果也进一步验证了其 受力安全性，可为同类桥梁施工提供参考与借鉴。 关键词：钢桁架桥横向拖拉跨既有线有限元分析应力监测
中图分类号：U445.461 文献标识码：A DOI ：10.3969/j. issn. 1009-4539. 2020.09.020
Study on Large-span Lateral Hauling Construction Technology for Steel Truss
饭没了秀2009Bridges Across Existing Beijing-Shanghai Railway
杭州中泰垃圾焚烧厂>甲基异丁酮XIE Yishun
(C h i n a R a i l w a y 24t h B u r e a u G r o u p Jiangsu Engineering Co. Ltd,, Nanj i n g Jiangsu 210028,C h i n a)
A bstract：In order to solve the problems of narrow construction space, large construction interference and short blockade
time of existing railway bridge construction, aiming at the construction of 48 m steel truss across Beijing-Shanghai Railway in reconstruction project of Dashan No. 1and No. 2 super large bridges on Jiabei line, this paper puts forward a construction method of overall horizontal dragging with less support and large span, so as to avoid large-scale and long-term support erection and removal. The construction of the existing line reduces the impact on the existing Beijing-Shanghai Railway and the construction investment of large-scale temporary facilities. Using Midas finite element software, the stress analysis of the overall drag support and slide beam in the process of transverse dragging and
sliding is carried out. The results show that the stress and deformation of the overall transverse drag support and slide beam meet the construction requirements. In addition, the stress monitoring results of the slide beam also further verify its stress safety, which can provide reference for similar bridge construction.密特朗总统
Key w ords：steel truss bridge；lateral hauling；across existing railway；finite element analysis；stress monitoring
1前言
随着我们社会经济发展，铁路交通路网建设日趋收稿日期：2020-07-03
基金项目：中铁二十四局集团江苏工程有限公司科技研发计划项目(2017-01号）
valsalva动作作者简介：谢以顺（1982 -)，男，江苏盐城人，高级工程师，主要从事桥梁施工及管理工作；E-mail: 120550916@q q.c o m 密集交错，跨越既有铁路钢桁架桥建设十分普遍[>3]，其施工具有施工空间狭小、施工安全压力大 及既有线施工封锁时间短等特点，其跨越施工多采用 顶推施工[4~5]和拖拉施工[6_8]两种形式。拖拉施工 作为跨既有线铁路钢桁架架设施工的主要方法，具有 对既有线影响时间相对较短，且施工防护难度小等优 点，在跨越繁忙路线工程中其优越性更加突显。以往
88铁道建筑技术RAILWAY CONSTRUCTION TECHNOLOGY 2020(09)
豫公网安备41160202000603
站长QQ:729038198
关于我们
投诉建议