以难著称的衡广复线南岭隧道,通过断裂岩溶发育地带,施工中共发生大的突水涌泥24次,大面积地表坍陷50余处,总计突水约100万m~3,涌出流塑状稀黄泥3万m~3,其规模之大以及给施工带来的灾害程度,在国内外隧道建设史上实属罕见。铁路部科技司于1990年11月22至23日在河北廊坊,召开了南岭隧道岩溶突水涌泥综合整 With the difficulty of weighing the Nanning tunnel of the Hengguang Double Track, through the development of the fault karst zone, a total of 24 large inrush surges occurred in the construction area and more than 50 large-scale surface collapses resulted in a total inrush of about 1 million m3, Shaped dilute yellow mud 30000 m ~ 3, its large scale and the degree of disaster to the construction, in the history of tunnel construction at home and abroad is rare. Ministry of Railways Science and Technology Division in November 1990 November 22 to 23 in Langfang, Hebei Province, held a Nanling tunnel karst water burst Mud mud integrated