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豫机城际:河南“头号”握手“中原一号”

2017-08-28 08:06:51   中国青年网

建设中的豫机城际铁路地下隧道⑨7王铮赵程远摄

□本报记者李林

一大朵沉甸甸的云悬在省道102线旁王村的上空,一阵急雨落在豫机城际铁路施工现场。

“都说地下掘进的隧道是‘龙’,我们这里还真是经常有来去匆匆的雨。”8月27日,把厚重的安全帽当“伞”,记者跟随中国铁建十六局集团豫机城际项目工作人员走进了隧道掘进的现场。

豫机城际铁路是我省投资建设的第一条城际铁路,自郑州机场引出,穿越南水北调中线工程干渠,至郑州南站。由于它承担着中原城市群北部地区与南部、东南部地区的城际客流和郑合、郑万铁路区际跨线客流,建成后将成为我省米字形高铁枢纽的重要组成部分,所以被誉为河南“头号”重点建设项目。

“豫机城际铁路工程全长约11.1公里,设计时速200公里,需穿越南水北调中线工程干渠,一次性长距离掘进3800米,开挖断面大,风险系数高、施工难度大,被列为全线重难点控制性工程。”中国铁建十六局集团豫机城际项目经理胡锦华说,为此他们专门设计并启用了“中原一号”盾构机。

在31米深的下沉井内,垂直电梯重重地停下,一个巨大无比的隧道口扑入眼帘。记者留意了一下,与一般的地铁隧道不同,这个隧道口足有三层楼高,人踏入其中显得十分渺小,整个隧道犹如一条长龙,向远处延伸。

(下转第二版)

(上接第一版)

沿着隧道向前行走约1公里处,一台巨大的桶状机械出现在眼前。“这就是专门为河南‘头号’重点建设项目工程量身定做的国产首台铁路双线大直径泥水平衡盾构机‘中原一号’!”中国铁建十六局集团豫机城际项目书记于兴国介绍说,这台盾构机与众不同,采用的是目前国际上最先进的间接式双舱气垫双回路控制技术,开挖直径12.81米,整机长度78米,重达2200吨,同时配备机器人辅助作业。

此时,这个“大家伙”并没有发出震耳欲聋的轰鸣声,而是安静地在隧道上“休息”。记者了解到,为了确保“中原一号”保持良好的掘进效率,当天恰逢它“体检”,准备更换刀盘。

“更换刀盘需要带压作业,具有相当的危险性,所以准备工作十分严谨。”操仓技术人员刘军伟告诉记者,“工作人员要在高于正常条件下2倍的高压环境中作业,每一个环节都存在危险性,所以场外还专门配备了救护车,说是用生命在作业也毫不为过。”

“修建的过程就是历险的过程。”于兴国强调说,豫机城际铁路将下穿南水北调干渠,掘进深度将达40余米,且要确保河床安全,不能有丝毫渗水、漏水现象发生,整个掘进过程是一次风险极大的考验。

据悉,目前豫机城际铁路隧道一标盾构工程已顺利完成第500环管片拼装,意味着该工程掘进里程突破千米大关,为2019年全线建成通车打下坚实基础。

一项重要的枢纽工程,一批奋力拼搏的人,都令人印象深刻。在记者即将结束采访走出隧道时,轰隆隆的盾构机声再次响起,那声音如同前进的号角,令人振奋。③6

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