[1]徐浩,乔建春,林红松,等.节间纵梁支座更换对钢桁梁上轨道的影响研究[J].高速铁路技术,2020,11(06):58-62.[doi:10.12098/j.issn.1674-8247.2020.06.011]
　XU Hao,QIAO Jianchun,LIN Hongsong,et al.Study on the Influence of the Replacement of Intersegment Longitudinal Beam Support on the Track on Steel Truss Beam[J].HIGH SPEED RAILWAY TECHNOLOGY,2020,11(06):58-62.[doi:10.12098/j.issn.1674-8247.2020.06.011]
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节间纵梁支座更换对钢桁梁上轨道的影响研究()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
11卷
期数:
2020年06期
页码:
58-62
栏目:
出版日期:
2020-12-28

文章信息/Info

Title:
Study on the Influence of the Replacement of Intersegment Longitudinal Beam Support on the Track on Steel Truss Beam
文章编号:
1674—8247(2020)06—0058-05
作者:
徐浩;  乔建春;  林红松;  蔡文锋
中铁二院工程集团有限责任公司, 成都 610031
Author(s):
XU Hao;  QIAO Jianchun;  LIN Hongsong;  CAI Wenfeng
China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China
关键词:
连续钢桁梁桥|节间纵梁|支座|无砟轨道|扣件
Keywords:
continuous steel truss bridge|intersegment longitudinal beam|support|ballastless track|fastener
分类号:
U213.5+3
DOI:
10.12098/j.issn.1674-8247.2020.06.011
文献标志码:
A
摘要:
为研究孟加拉帕德玛大桥节间纵梁支座更换对桥上轨道受力的影响，本文通过建立轨道-桥梁一体化计算模型，分析了连续钢桁梁桥下横梁两侧节间纵梁顶升高度和扣件松开范围对桥上无砟轨道系统受力的影响规律。结果表明：（1）钢轨和扣件系统受力随顶升高度的增大而增大；（2）在相同的顶升高度下，随着扣件松开个数的增大，钢轨和扣件系统受力减小；（3）节间纵梁顶升高度大于1 mm且不松开扣件，扣件系统所受上拔力超过20 kN；（4）节间纵梁顶升10 mm，下横梁上扣件全部松开，同时伸缩缝左右两侧各松开1个扣件，此时扣件上拔力为3.2 kN；（5）考虑养护维修方便，建议节间纵梁支座更换时，节间纵梁顶升高度10 mm，并松开下横梁上全部扣件及伸缩缝左右两侧各1个扣件。本研究成果可为大跨连续钢桁梁桥上节间纵梁支座更换提供参考。
Abstract:
In order to study the influence of replacement of intersegment longitudinal beam support of Padma Bridge in Bangladesh on the stress of the track on the bridge, this paper analyzes the influence law of the jacking height of intersegment longitudinal beam on both sides of the lower beam of the continuous steel truss bridge and the loosening range of fasteners on the stress of ballastless track system on the bridge by establishing the integrated calculation model of track and bridge. The results show that: (1) The stress of rail and fastener system increases with the increase of jacking height. (2) Under the same jacking height, with the increase of the number of fasteners loosened, the stress of rail and fastener system decreases. (3) When the jacking height of the intersegment longitudinal beam is greater than 1 mm and the fastener is not loosened, the uplift force on the fastener system exceeds 20 kN. (4) When the intersegment longitudinal beam is lifted up to 10 mm, all fasteners on the lower beam are loosened, and 1 fastener is loosened on the left and right sides of the expansion joint at the same time, the uplift force on the fastener is 3.2 kN. (5) Considering the convenience of maintenance, it is suggested that when the support of intersegment longitudinal beam is replaced, the jacking height of intersegment longitudinal beam should be 10 mm, and all fasteners on the lower beam and 1 fastener on the left and right sides of expansion joint should be loosened. The research results can provide a reference for the replacement of the upper intersegment longitudinal beam support of long-span continuous steel truss bridge.

备注/Memo

备注/Memo:
作者简介:徐浩(1989-),男,高级工程师。基金项目:中国科协青年人才托举工程项目（2019QNRC001）；中铁二院科技开发计划（KYY2017055（17-20））引文格式:徐浩, 乔建春, 林红松, 等. 节间纵梁支座更换对钢桁梁上轨道的影响研究[J]. 高速铁路技术, 2020, 11(6):58-62.XU Hao, QIAO Jianchun, LIN Hongsong, et al. Study on the Influence of the Replacement of Intersegment Longitudinal Beam Support on the Track on Steel Truss Beam[J]. High Speed Railway Technology, 2020, 11(6):58-62.
更新日期/Last Update: 2020-12-28