谈半明半暗隧道进洞施工技术

Introduction to half bright and half dark tunnel construction technology

以十白高速SHTJ-5标堵河隧道为工程背景,由于其左线出口地质条件差,因此洞口进洞设计为半明半暗开挖,为了顺利进洞,采用了洞顶截水沟、边仰坡开挖、支护,结合偏压挡墙施工、套拱、管棚施工以及洞顶回填土等关键施工工艺,结果表明采用该施工工艺取得了理想效果。

With the Shi-Bai high-speed SHTJ-5 standard Duhe tunnel as the engineering background, because of the geological condition of ex- port in left line is so poor, so the hole was designed for half bright and half dark excavation. In order to smoothly into the hole, the key construction technology of intercepting ditch roof, scope of slope excavation, supporting, bias retaining wall construction, the set of arch, the pipe roof construction and backfill roof were adopted. Results show that using this construction technology has obtained the ideal effect.