根据北京的城市气候特点，在露天的道岔处设置融雪装置，以便有效地解决冬季大量降雪导致的道岔积雪、结冰、不能可靠锁闭等问题，保证列车能安全、正常地运行。以北京地铁15号线工程为例，论述在地铁道岔处设置融雪装置的必要性，介绍道岔融雪系统设备的原理及设计方案。

According to the climate characteristics of Beijing， setting snow-melting devices in the open air at turnouts can effectively solve the problems caused by accumulated snow and ice on the turnouts and unreliable lock，thus ensure the safe and normal running of trains． Taking turnout snow-melting device on Beijing metro Line 15 as an example，this paper introduces the principles and design scheme of this device，as well as the necessity of its application．

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