铁道建筑

为满足国家铁道试验中心小环线线路改造项目小环线与大环试验线的连接需求，本文设计了可实现列车高速过岔的同侧曲线道岔，研究内容包括平面线形和结构设计。对比29号、35号、39号同侧曲线道岔的平面布置、岔后线形、既有线改造难度及工程量，结合结构安全与运营需求综合分析，确定采用39号同侧曲线道岔方案。基于车辆-道岔耦合动力学模型，对该39号同侧曲线道岔开展动力响应仿真分析。结果表明：列车以200 km/h速度大环逆向、150 km/h速度小环逆向通过道岔时，轮重减载率、脱轨系数、车体垂向和横向振动加速度均处于安全限值范围内。该道岔解决了既有东西一千连接装置不具备自动转换功能的问题，提升了试验中心的综合试验能力与安全性，并填补了国内大号码高速同侧曲线道岔工程应用空白。

To meet the connection demand between the small loop line and the large loop test line in the small loop track reconstruction project of the National Railway Test Center, this paper designs a same-side curved turnout enabling high-speed train passing, with research contents covering horizontal alignment and structural design.By comparing the layout, turnout rear curve, reconstruction difficulty of existing lines and engineering quantity of No.29, No.35 and No.39 same-side curved turnouts, and conducting comprehensive analysis combining structural safety and operation requirements, the scheme of No.39 same-side curved turnout is determined.Based on the vehicle-turnout coupling dynamic model, dynamic response simulation analysis is carried out on this No.39 same-side curved turnout.The results show that when trains pass through the turnout in reverse direction at 200 km/h on the large loop and 150 km/h on the small loop, the wheel load reduction rate, derailment coefficient, vertical and lateral vibration acceleration of carbody are all within the safety limit range.The turnout solves the problem that the original east-west fixed connecting device cannot realize automatic switching, improves the comprehensive test capacity and safety of the test center, and fills the domestic blank in the engineering application of large-number high-speed same-side curved turnouts.