为保证下穿水库采空区隧道开挖施工的安全性和围岩稳定性,文章以实际工程为例,研究短台阶预留核心土法在下穿水库采空区隧道开挖施工中的应用.具体而言,结合工程的实际情况及施工难点,确定短台阶预留核心土法的隧道开挖施工流程,并选择合适的施工设备进完成隧道开挖施工.对施工结果进行监测分析后得出:各监测点的结果均满足工程相关标准,安全度均大于1,位移均小于30 mm.
The Application of Short Bench Reserved Core Soil Method in Tunnel Excavation Undercrossing Reservoir Goaf
In order to ensure the safety and stability of the surrounding rocks in the excavation construction of the tunnel undercrossing the reservoir goaf,this paper takes the actual engineering as an example to study the appli-cation of the short bench reserved core soil method in the tunnel excavation construction undercrossing the reservoir goaf.Specifically,combined with the actual situation and construction difficulties of the engineering,the tunnel ex-cavation construction process by the short bench reserved core soil method is determined,and the appropriate con-struction equipment is selected to complete the tunnel ex-cavation construction.After monitoring and analyzing the construction results,it is concluded that the results of each monitoring point meet the relevant standards of the engi-neering,the safety degree is above 1,and the displacement is less than 30 mm.
short benchreserved core soil methodun-dercrossing reservoirgoaftunnel excavation
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