城市轨道交通14号道岔结构设计方案及其性能分析
方东周华龙王小韬周昌盛刘宇航
Structural Design Scheme and Performance Analysis of Urban Rail Transit No.14 Turnout
FANG DongZHOU HualongWANG XiaotaoZHOU ChangshengLIU Yuhang
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作者信息:中铁二院工程集团有限责任公司，610031，成都
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Affiliation:China Railway Eryuan Engineering Group Co., Ltd., 610031, Chengdu, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.03.029
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中图分类号/CLCN:U231.2
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栏目/Col:研究报告
摘要:
［目的］既有城市轨道交通线路道岔存在侧向过岔速度偏低进而影响折返能力的问题。为使地铁8节编组A型车在远期具备30对/h的能力，需要设计可满足高速过岔要求的道岔结构方案，使道岔侧向过岔速度达到67km/h。［方法］以钢轨质量规格为60kg/m的14号道岔(以下简称“14号道岔”)为研究对象，提出了14号道岔及其交叉渡线的结构设计方案。根据现行的相关标准和规范，运用道岔转换计算理论，对所提设计方案进行了岔尖轨转换计算。建立了无缝道岔有限元模型，对14号无缝道岔的设计方案进行了静力学仿真分析。［结果及结论］该设计方案的道岔转换力、不足位移最大值、轮缘槽宽最小值均满足控制指标要求，道岔钢轨强度、传力部件强度、可动部分纵向位移值均满足规范要求。
Abstracts:
［Objective］ Existing urban rail transit turnouts suffer from low lateral crossing speed, which adversely affects turn-back capacity. To enable 8-car A-type metro trains to achieve a capacity of 30 pairs per hour in the long term, it is necessary to design a turnout structure scheme that can meet high-speed crossing requirements, with a lateral crossing speed of up to 67 km/h. ［Method］ The research takes a No.14 turnout with a rail mass specification of 60 kg/m (hereinafter referred to as ′No.14 turnout′) as research object, and a structural design scheme for the No.14 turnout and its diamond crossing is proposed. Based on current relevant standards and specifications, the turnout conversion calculation theory is employed to perform switch rail conversion calculations for the proposed design scheme. A seamless turnout finite element model is established to conduct static simulation analysis for the design scheme of No.14 seamless turnout. ［Result & Conclusion］ The proposed design scheme meets the required control indicators for turnout conversion force, maximum allowable displacement, and minimum wheel flange groove width. Furthermore, the strength of the turnout rails, force transmission components, and longitudinal displacement of movable parts are all compliant with the specifications.
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