400 km/h高速铁路道岔选型探讨-《高速铁路技术》

文章信息/Info

Author(s):: HU Hongjun; XU Jingmang; 1. China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, China;
2. Southwest Jiaotong University, Chengdu 610031, China

Keywords:: high-speed turnout|number selection|lateral speed|railway operation

摘要:: 开展400 km/h高速铁路设计、建造、运营、维护成套技术研究，推动中国高速铁路技术实现新提升，打造一条400 km/h新建高速铁路示范线是当下新的战略任务。道岔是铁路线路中引导列车换线运行的关键设备，本文基于高速道岔设计理论，开展400 km/h高速铁路道岔选型研究，从道岔结构、站场条件、工程投资、铁路运输、道岔应用等方面对道岔号数选择及侧向过岔速度建议值进行深入探讨。结果表明：（1）考虑过岔安全性及平稳性要求，18号道岔的直向容许通过速度不建议提高至400 km/h；（2）考虑工程投资需要，可采用21号道岔降低固有结构不平顺变化率，提升直向过岔速度；（3）为保证3.5 min列车运行间隔时间要求及满足到发线有效长不变的条件，21号道岔侧向速度建议为100 km/h。

Abstract:: Presently, our new strategic task is to study the packaged technologies of 400 km/h high-speed railway for its design, construction, operation, and maintenance, promote the Chinese high-speed railway technology to a new stage, and create a new 400 km/h high-speed railway demonstration line. Turnout is a key device that guides the trains for line change in railway operation. Based on the design theory of high-speed turnouts, this paper studies the selection of turnouts for 400 km/h high-speed railway and has an in-depth discussion on the selection of turnout numbers and the recommended values of lateral crossing speed in terms of turnout structure, station yard conditions, project investment, railway transportation, and turnout applications. The results show that:(1) Considering the safety and stability requirements for passing the turnout, it is not recommended to increase the allowable straight crossing speed of No.18 turnout to 400 km/h. (2) Considering the project investment needs, No.21 turnout can be used to reduce the rate of change of inherent structural irregularities and improve the straight crossing speed. (3) It is recommended to set the lateral speed of No.21 turnout to 100 km/h to ensure the 3.5 min train running interval and keep the effective length of the arrival-departure track unchanged.