大断面富水煤系地层公路隧道开挖施工技术

The construction technology of large cross-section rich water coal measure strata highway tunnel excavation

指出煤系地层施工是隧道尤其是大断面隧道施工中的难点,结合二广高速公路12合同段大崛坑2号隧道在富水煤系地层中的施工实践,详细介绍了三台阶上弧形导坑法在施工中的应用,为大断面隧道在同类地层施工提供了借鉴。

It pointed out that coal measure strata construction was difficult of tunnel,especially large cross-section construction.Combined with the construction practice of 12 contract segment large pitting No.2 tunnel of Er-Guang express highway in rich water coal measure strata,the three-pedestal sit upper arc pilot tunnel method application in construction was detail introduced,which provided reference for large cross-section tunnel construction in similar strata.