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山区铁路在既有线改建或增建二线建设时,往往需修建临时便线保证既有线列车正常运营。结合襄渝铁路增建二线施工中临时便线工程实例,分析了西南山区铁路复曲线型临时便线和直线切圆处理2种临时便线线型设计方法。提出在满足安全、适用、经济、可靠、操作性强的前提下,山区铁路临时便线可采用特殊线型设计,以适应各种复杂的外部条件。
When the existing railways are reconstructed or the second-line construction is to be built, the mountainous railways often need to construct temporary convenience lines to ensure the normal operation of the existing line trains. Combined with the case of the temporary meridian project in the construction of the second line of Xiangyu-Yuzhou Railway, the paper analyzes two kinds of linear design methods of temporary complex lines and straight tangent circles for complex curves of railway in southwest mountainous area. It is proposed that the special design of temporary railway line in mountainous railway should be adopted to meet various complicated external conditions under the premise of meeting the requirements of safety, application, economy, reliability and operability.