Application of Staggered Tunnel in the Construction of Small Diameter Hydraulic Tunnels
The construction organization of small-diameter tunnels in water conservancy and hydropower pro-jects has always been a difficult point in the construction process,and it is also a focus of project management and control.By utilizing limited construction resources for reasonable on-site organization and reducing the construction time of each process cycle such as tunnel excavation,support,lining,and grouting through organi-zational means,the utilization rate of construction resources can be greatly improved and the construction peri-od can be shortened.In the construction process of the urban and rural water supply tunnel in the Lijiayan Reservoir project,a staggered tunnel was set up inside the tunnel,and it was fully utilized throughout the tun-nel construction process,solving the problem of the inability to staggered in small diameter tunnels.At the same time,the construction efficiency was effectively improved,which has certain reference significance for the construction of similar small diameter tunnels.
Small tunnel diameterHydraulic tunnelStaggered tunnelsConstruction efficiencyLijiayan Reser-voir Project
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