日前，由中铁十九局集团司二公司施工的云桂铁路（广西段）站前4标段塘甘隧道安全贯通。至此，该公司负责的七座隧道全部贯通。
据悉，中铁十九局集团承建了云桂铁路（广西段）站前4标，其中有11.6公里正线施工标段由二公司负责。管段内山高路陡，仅施工便道就长达63公里。7座隧道中有5处浅埋、多处偏压、围岩破碎多为5级。为确保隧道安全掘进，该经理部采用盖挖法，即拱部采用明挖，做护拱，洞身采用暗挖通过。他们还加强隧道支护，严格按照安全步距要求，一榀一榀地进行开挖，有效控制了浅埋及偏压给施工带来的诸多风险，确保了七座隧道建设的安全有序。
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