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| Design and Study on No. 9 Single Turnout of 60 kg/m Rail of Urban Rail Transit |
| LIU Dao-tong，CHENG Bao-qing, TIAN Miao-sheng |
| The Third Railway Survey and Design Institute Group Corporation, Tianjin 300251，China |
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Abstract Research purposes： The No. 9 turnout of 60 kg/m is usually used in urban rail transit s main track and auxiliary track. There are mainly two types of turnouts used in the urban rail transit, namely the turnouts with the straight switch rail and the curve switch rail. The turnout with straight switch rail is available for the siding speed of 30km/h and the turnout with curve switch rail is available for the speed of 35 km/h. In order to improve the service level, the turnout with curve switch rail is used in the new 一 built metro. But the turnout with curve switch rail has its disadvantage，such as the serious wear of the switch rail and many non 一 standard parts. In order to give the paly of the single turnout with straight switch rail, a new type of single turnout available for the siding speed of 35 km/h is presented in this paper, with the features of the simple structure and long service life.
Research conclusions ： (1) This new type of single turnout of the 60 kg/m rail has the straight switch rail，straight frog， and circular curve, with the simple structure. (2) Two switch rails are symmetrical, and can be pulled flexibly.(3)This turnout is available for the siding speed of 35 km/h，with less maintenance. (4) This research result has obvious advantages in the mature technology, reliability and security, and it is available for the metro, light rail and trolley car.
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Received: 20 March 2013
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2013, Vol. 30 
