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以京广高铁为例,提升运营速度,线路必须要可靠。但是,王梦恕指出,由于不同的区间半径要求,可以在不同地区段,跑出不同的速度,一条线路上,既可以有250公里的时速,也可以跑出350公里的时速,不一定非得“一刀切”。
“提速不仅仅是线路的提速,还可以改变运营方法。”王梦恕举例说,列车快速进站、出站,把高铁的速度快速降下来,快速启动,也可以减少运营时间。所以,也并不是单纯的线路速度提至350公里,要从运营的各个方面,考虑提速问题。
降速之路
降速前,曾有5条高铁时速350公里
与普通既有铁路相反,高铁的速度,从诞生之初,似乎一直处于下降的通道。
从2008年8月1日首条350公里时速运营的京津城际起,接下来建成并运营多条时速350公里的高铁,分别是:2009年12月26日,武广高速铁路通车;2010年2月6日,郑西高铁开通;2010年7月1日,沪宁高速铁路开通;2010年10月26日,沪杭高速铁路开通。截至2010年年底,中国运营的时速350公里的高速铁路共有5条,总里程2116.6公里。
但是,很快中国高铁迎来转折点。2011年4月份,原铁道部开始调研高铁降速,2011年6月30日,京沪高铁开通,这条世界上标准最高的高速铁路,按照时速300公里开通运营。第二天,2011年7月1日,中国高铁全面降速。武广高铁、郑西高铁、沪宁高铁、沪杭高铁全面降速到300公里时速运营。这时候,设计时速350公里降速到300公里运营的线路共计4条,京沪、武广、郑西、沪宁共计3169.6公里。时速350公里高速铁路只保留了两个短距离线路,第一条是中国高铁的样板工程——京津城际高速铁路,全长118公里;第二条是沪杭高速铁路,全长147公里。
然后,2011年8月16日与8月28日,高铁又分两个阶段全面降速,京津与沪杭也降速到时速300公里运营。作者:刘江浩
责任编辑:李东舰 CN031
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