9号单开道岔尖轨平面线型方案研究

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摘要研究目的：在城市轨道交通9号单开道岔中，尖轨平面线型是影响尖轨使用寿命、行车安全和道岔尺寸的重要因素。为指导9号单开道岔的结构设计，需建立尖轨线型的设计计算方法，在分析尖轨线型对道岔平面尺寸影响的基础上，研究提出9号单开道岔合理的尖轨平面线型。

研究结论：(1)增加相离值能减小列车逆向进入道岔侧股时对尖轨的冲击和增加尖轨直线段长度，能提高尖轨使用寿命；(2)适当增加半切断面角度，能缩短道岔全长和增加尖轨直线段长度；(3)在道岔基本参数不变的的情况下，使半切断面支距等于轮对最大游间时的相离值最合理；(4)当道岔基本参数与现有28．3 m 长道岔一致，基本轨前端长分别为2．620 m、2．020 m时，其最合理的相离值分别为16 mm、23 mm；(5)本文研究成果对9号单开道岔的结构设计具有一定的参考意义。

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	全顺喜

关键词 ： 9号单开道岔, 尖轨平面线型, 相离值, 半切断面

Abstract：Research purposes：Horizontal alignment of switch rail has important effect on the service life of switch rail， driving safety and size of turnout in the No．9 turnout of urban mass transit．In order to guide the structure design of the No．9 turnout．the design calculation method of switch rail horizontal alignment should be established．The reasonable switch rail horizontal alignment of No．9 simple turnout should be proposed by analyzing the influence of switch rail alignment on the plane size of turnout．

Research conclusions：(1)Impact on switch rail is decreasing when the train passing through the turnout on the adverse route and the straightway length of switch rail is increasing with the increasing of disjoint value．Increasing the disjoint value can improve the service life of switch rail．(2)Increasing the half cut surface appropriately will shorten the length of turnout and increase the straightway length of switch rail．(3)The disjoint value is reasonable when the offset of half cut surface is equal to the maximum clearance of wheel-set under the condition of basic parameters of turnout are fixed． (4)The reasonable disjoint values are 16 mm and 23 mm when the basic parameters are consistent with current No． 28．3 m long turnout．which front lengths of basic rail are 2．620 m and 2．020 m．(5)This paper studies has some reference significance to the structure design of the No．9 turnout．

Key words： No．9 simple turnout horizontal alignment of switch rail disjoint value half cut surface

收稿日期: 2013-07-24

PACS:

U211

作者简介: 全顺喜，1984年出生，男，工程师

引用本文:

全顺喜. 9号单开道岔尖轨平面线型方案研究[J]. 铁道工程学报, 2013, 30(12): 29-32.
QUAN Shun-xi. Research on Project of Horizontal Alignment of Switch Rail for No．9 Simple Turnout. 铁道工程学报, 2013, 30(12): 29-32.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2013/V30/I12/29

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