四纵四横高铁网初具规模

expanded

11月25日，一列和谐号动车组行驶在郑州黄河公铁两用大桥上。祝 庆摄（新华社发）

11月２５日清晨７时５０分，一辆ＣＲＨ３８０Ａ动车组驶离北京西站。京广高铁北京至郑州段转入按运行图模拟运行试验阶段。一个月后，京广高铁将全线打通。

一批重要的高铁干线今年相继通车运营

四纵四横高铁初具规模

京广高铁

北京至广州全程８小时左右

京广高铁全长约２２００公里、是纵北京最大青春痘医院贯中国南北的快速客运大通道。２００９年１２月，京广高铁武广段开通运营；２０１２年９月，京广高铁郑武段开通。至此，京广高铁只剩京郑段尚未开通。待全线打通后，北京至广州全程缩短至８小时左右。

今年以来，一批重要的高铁干线和高铁连接线相继通车运营，中国规划的“四纵四横”高铁已经初具规模：郑武高铁在今年国庆长假前通车，打通了京广与郑西高铁；合蚌高铁１０月份开通后，把京广、京沪、沪汉蓉三条高铁主干线紧密联结起来。１２月１日，中国横跨东北三省的第一条高寒高铁——哈大高铁也将开通运营。

记者从铁道部了解到，作为世界上第一条投入运营的新建高寒地区长大高速铁路，哈尔滨至大连高速铁路目前已完成开通运营前的各项准备工作。哈大高铁营业里程921公里，设计时速350公里，纵贯北京最好扁平疣医院辽宁、吉林、黑龙江三省，途经23个车站。作为我国“四纵四横”高速铁路中的重要“一纵”，哈大高铁可以通过既有的秦沈客运专线和京秦铁路，实现同已经运营的京沪高铁和即将全线贯通的京广高铁相连。

哈大高铁

东北与关内地区时空距离缩短

虽然在运行试验期间动车组最高试验时速达到385公里，但鉴于哈大高铁是世界上第一条投入运营的新建高寒地区长大高速铁路，为了探索积累高寒地区高铁运营管理经验，同时增加哈大高铁运营的安全冗余，尤其是确保冬季运营安全，铁路部门在哈大高铁运营初期，实行冬季和夏季“两张列车运行图”，分别按时速200公里和300公里两个速度等级开行动车组列车，同时实行与两个速度等级相对应的票价。

铁道部科学技术司司长周黎介绍，哈大高铁的建成通车，标志着我国北京最好痤疮医院已经掌握了在高寒地区修建高速铁路的技术。哈大高铁沿线冬季极端最低温度零下40℃左右，最大积雪厚度30厘米，沿线土壤最大冻结深度达205厘米。针对高寒地区的特殊环境，铁道部专题组织了22项科研课题，系统开展了技术创新工作，解决了路基“冻胀”控制技术难题，并研制了适应低温运营环境的高寒动车组，掌握了牵引供电、通信信号等设备低温适应性技术，形成了高寒地区高速铁路成套技术。“目前，相关技术都经过了试验验证和运行试验，试验考验结果表明，哈大高铁技术是可靠的。”周黎说。

据了解，哈大高铁开通运营，对促进东北三省的人流、物流、信息流快速流动，缩短东北与关内广大地区的时空距离，振兴东北老工业基地具有重要意义。初步估算，哈大高铁通车初期，沈大线每年可增加货运能力1150万吨，京哈线沈阳北京最好的扁平疣医院至哈尔滨区段每年可增加货运能力1000万吨，可大大缓解目前哈大铁路通道运输能力紧张局面。

【链 接】

四纵四横铁路

根据我国中长期铁路规划，“四纵四横”客运专线将成为连接大城市的快速通道。

四纵：

北京—上海客运专线，贯通京津至长江三角洲东部沿海经济发达地区

北京—武汉—广州—深圳客运专线，连接华北和华南地区

北京—沈阳—哈尔滨(大连)客运专线，连接东北和关内地区

上海—杭州—宁波—福州—深圳客运专线，连接长江、珠江三角洲和东南沿海地区

四横：

徐州—郑州—兰州客运专线，连接西北和华东地区

杭州—南昌—长沙—贵阳—昆明客运专线，连接西南、华中和华东地区

青岛—石家庄—太原客运专线，连接华北和华东地区

南京—武汉—重庆—成都客运专线，连接西南和华东地区生茶与熟茶的区别生茶好还是熟茶好

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