城市轨道交通单渡线曲线道岔设置及改建方案研究

摘要

在城市轨道交通工程中,小半径曲线和大坡度纵断面所占的比重较大,而道岔需要设置在直线上,这对单渡线、折返线及存车线的设置带来很大的困难.通过对重庆轨道交通6号线大剧院站临时单渡线曲线道岔的设置、施工及改建方案的研究,提出了一种在大坡度及小半径曲线上设置单渡线曲线道岔的可行方案,为国内其他地区城市轨道交通曲线道岔的设置起到指导和借鉴作用.%The proportion of small-radius curves and longitudinal sections with steep slopes is relatively larger in general urban rail transit projects, while the turnouts need to be laid upon the straight line. So the situation often causes great difficulties to set up the single crossover, turn-back track and the vehicle storage siding. In this article, by means of studying on the schemes of turnout's laying, constructing and rebuilding at Great Theatre Station of Chongqing Rail Transit Line 6, the feasible scheme of laying the curve turnout of single crossover upon steep slope and small radius is given. This feasible scheme can also offer beneficial suggestions for laying the curve turnouts of urban rail transit in other parts of our country.