10月28日，在北京地下直径线工程施工现场，工人甘宜东在隧道管片上钻孔。 On October 28,In the Beijing underground diameter line engineering construction site,GanYiDong workers in tunnel segment on drilling.

    北京地下直径线工程是我国第一条采用大直径泥水盾构施工的地下电气化铁路隧道，是承启北京站与北京西站的重要地下工程，地处北京市中心区，呈东西走向，线路全长9151米，其中隧道长7230米。中铁隧道集团承建了该线包括5175米盾构隧道施工在内的6230米隧道施工任务。其中直径12.04米的盾构掘进，为国内独头掘进距离最长的大直径泥水盾构施工，因其施工风险高、施工难度大，被北京市列为“施工最难，风险最大的在建地下工程”，被铁道部列为“极高风险I号工程”。目前，盾构掘进累计完成已超过4000米，87个安全风险源已顺利通过67个，施工安全质量得到北京市、铁道部的好评。2012年9月，盾构机压缩空气条件下切割焊接技术试验的成功，填补了国内空白；10月份，施工人员创造了大直径泥水盾构月掘进207米的好成绩。新华社记者 沈伯韩 摄 Beijing underground diameter line engineering is China's first use of large diameter muddy water shield construction of underground electrification railway tunnel,Is Beijing station and Beijing west railway station innumerable important underground engineering,Is located in the central district of Beijing,Things to the,Line length of 9151 meters,The tunnel is 7230 metres long.China railway tunnel group the construction of line include the 5175 - meter shield tunnel construction, the 6230 meters tunnel construction task.The diameter of 12.04 meters of shield driving,For the domestic only head driving distance of the longest large diameter muddy water shield construction,For the construction of the high risk/Construction difficulty,Listed by the Beijing municipal"Construction the hardest,The biggest risk in underground engineering",Was listed as the ministry of railways"Extremely high risk I number engineering".At present,Shield driving has been finished already more than 4000 meters,87 security risk source has passed 67,Construction safety quality get Beijing/The ministry of railways praise.In September of 2012,Shield machine compressed air condition cutting welding technology test success,Have filled in the domestic blank;In October,Construction personnel created large diameter muddy water shield month advance 207 m good result.Xinhua news agency reporters ShenBo Korea perturbation

    10月28日，在北京地下直径线工程施工现场，两名施工人员擦拭安装隧道管片的机械。     On October 28,In the Beijing underground diameter line engineering construction site,Two construction workers wipe installation of shield tunnel machine.新华社记者 沈伯韩 摄 Xinhua news agency reporters ShenBo Korea perturbation

    10月28日，在北京地下直径线工程施工现场，工作人员指挥吊运隧道管片。     On October 28,In the Beijing underground diameter line engineering construction site,Staff command lifting tunnel segment.新华社记者 沈伯韩 摄 Xinhua news agency reporters ShenBo Korea perturbation

    10月28日，在北京地下直径线工程施工现场，操作司机曹宏亮（右）和王志鹏在盾构主控室控制隧道掘进过程。     On October 28,In the Beijing underground diameter line engineering construction site,Operation CaoHongLiang driver(right)And WangZhiPeng in shield master control room control tunneling process.新华社记者 沈伯韩 摄 Xinhua news agency reporters ShenBo Korea perturbation

    10月28日，在北京地下直径线工程施工现场，一名施工人员行走在已经完成掘进的隧道里的人行道上。     On October 28,In the Beijing underground diameter line engineering construction site,A construction personnel walk in the tunnel has been completed advance the sidewalk.新华社记者 沈伯韩 摄 Xinhua news agency reporters ShenBo Korea perturbation

    10月28日，一名工人在离开北京地下直径线工程施工现场时回望施工工地。     On October 28,A worker in the left Beijing underground diameter line engineering construction site looking at construction sites.新华社记者 沈伯韩 摄 Xinhua news agency reporters ShenBo Korea perturbation