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井水隧道位于福建省宁德至武夷山段高速公路A17合同段,设计时速为100km、双向4车道,左右洞平均长821m,为分离式中隧道。在施工过程中由于洞口山体富水、亲水性强导致稳定性极差,隧道洞口在开挖过程中边、仰坡发生多次滑塌及调整隧道明暗洞交界面里程,并增加降水措施仍无法进洞施工。最后邀请国内知名隧道专家到现场踏勘,并提出棚架法施工方案,才顺利进洞施工。本文主要讲述的是专家们推崇的棚架法施工方案。
Well water tunnel is located in Ningde, Fujian Province to Wuyishan expressway A17 contract section, the design speed of 100km, two-way four lanes, left and right holes on average 821m long, for the separation of the tunnel. In the process of construction, due to the rich water and high hydrophilicity of the cave, the stability of the tunnel is extremely poor. During the excavation process, the tunnel hole slides multiple times and adjusts the tunnel light and dark tunnel interface mileage and increases the precipitation measures Can not hole construction. Finally invited well-known tunnel experts to the scene reconnaissance, and proposed scaffolding construction program, only smooth hole construction. This article focuses on the scaffolding construction scheme that experts advocate.