不良地质条件下TBM施工技术对策

Countermeasure Against TBM Construction Under Poor Geological Conditions

我国目前最长的铁路隧道—西安安康线的秦岭隧道由Ⅰ线和Ⅱ线两座单线隧道组成。其中Ⅱ线采用钻爆法开挖平导,并于1998年3月18日贯通,而Ⅰ线则采用德国Wirth公司8.8m直径的全断面硬岩掘进机施工。从Ⅲ线平导的开挖情况看,Ⅰ线隧道将要穿过破碎带、涌水地层以及岩爆区段等不良地质地段,这将给TBM的施工带来困难。针对这些情况,本文提出了解决这些问题的一些建议,可供有关人员参考。

Qingling tunnel on Xian -Ankang Railway Line , consisting of No. 1 and No 2 Tunnels, is the longest railway tunnel in China at present . Drill and blast method was used to excavate the parallel adit of No. 2 Tunnel and it was completed on 18 March ,1998; While a full -face hard TBM with a diameter of 8. 8 m which is manufactured by the Wirth Company of Germany was used for the Qinling No. 1 Tunnel . According to the excavation of parallel adit of Qinling No. 2 Tunnel ,the Qinling No. 1 Tunnel will cut through the poor geological sections , such as fractured zone , water inflow zone and rock burst zone , which is difficult for TBM's construction . Some suggestions are recommended in this paper to solve these problems. ;