4月27日，中铁十六局的建设者们在新关角隧道进行掌子面打孔作业。关角，在藏语中的意思是“登天的梯”，天路——青藏铁路从关角山穿山而过，全线海拔3847米，冻害严重。天路之巅的关角隧道，自1977年通车以来，为青藏高原的经济发展提供着有力保障。坚守于此的青藏铁路关角通风工区的工友们每天都要徒步进入隧道，进行除冰等作业，确保隧道乃至青藏铁路全线的安全运营。如今，在关角隧道的山后，中铁十六局的建设者们正劈山移石，一条新的隧道即将建成。这条单线32公里的新关角隧道，目前施工进展顺利，距离贯通只差3公里。贯通后，青藏铁路天棚至察汗诺区间将缩短近一半，运力将由当前平均每日17.7对增加到56对。新华社记者 王博 摄     On April 27,China railway 16th bureau of the builders in the new constraints GuanJiao tunnels for drilling operation.GuanJiao,Meaning is in the Tibetan language"The ladder's day",Days - the qinghai-tibet railway from GuanJiao mountains wear,Across the board at an altitude of 3847 meters,Frost damage is serious.To creat GuanJiao reaching the top of the tunnel,Since opening in 1977,Provide the powerful guarantee for the economic development of the Tibetan plateau.Stick to in the qinghai-tibet railway GuanJiao ventilation work area workmates on foot every day into the tunnel,For de-icing etc,Ensure the safety of the tunnel and the qinghai-tibet railway was operating.now,In GuanJiao mountain tunnel,China railway 16th bureau of the builders are opened move away the stone,A new tunnel is built.A single new GuanJiao tunnel of 32 kilometers,Current construction progress smoothly,Well versed in only 3 kilometers.After running,Qinghai-tibet railway ceiling to examine khan's range will be nearly in half,Capacity will be increased to 56 the current daily average of 17.7.Xinhua reporter wang perturbation

    4月27日，在关角隧道内的避车洞内，青藏铁路关角通风工区的职工朱洪太、朱满太、吴瑞青、徐文俊、赵军利（由左至右）在等待列车通过。新华社记者 王博 摄     On April 27,In GuanJiao refuge hole in the tunnel,The qinghai-tibet railway worker Zhu Hongtai GuanJiao ventilation work area/Zhu is too full/Wu Ruiqing/Xu Wenjun/Zhao Junli(From left to right)Waiting for the train to pass.Xinhua reporter wang perturbation

    4月27日，关角隧道内，青藏铁路关角通风工区职工张元庆在进行除冰作业。新华社记者 王博 摄     On April 27,GuanJiao tunnel,Qinghai-tibet railway Zhang Yuanqing GuanJiao work area ventilation worker in deicing operations.Xinhua reporter wang perturbation