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一、工程概况八一林隧洞是引滦入还输水工程的重要建筑物,是有关上级部门安排推广采用“光面爆破,锚喷支护作为永久衬砌”技术的一项工程。该隧洞开挖长度为2,018.3米,开挖断面
I. Project Overview The Bayi-Lin Tunnel is an important building for water diversion project from Luan River to Luan River and is a project on promotion of the adoption of “Smooth Blasting and Anchor Bolt Support as a Permanent Lining Technology” by higher level departments. The tunnel excavation length of 2,018.3 meters, excavation section