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结合芹口隧道出口桥隧相连结构深基坑开挖,采用了围护桩+微型钢管桩和临时锚喷网的支护方案。介绍了隧道边仰坡加固、围护桩支挡和微型钢管桩注浆加固的支护技术,通过对芹口隧道边仰坡、洞身的位移及变形监测,表明隧道整体稳定性及支护效果良好。
Combined with the deep foundation pit excavation of the connecting structure of the exit bridge and tunnel of Qinkou tunnel, the support scheme of the retaining pile + micro-steel pipe pile and the temporary anchoring net is adopted. This paper introduces the support technology of side elevation slope reinforcement, retaining stake retaining and micro steel pipe pile grouting reinforcement. Through the monitoring of the displacement and deformation of the sideslope of Qinkou Tunnel, the tunnel body shows the overall stability of the tunnel and its support Good effect.