Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area
A technology of shallow burial and underground excavation and construction method, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., and can solve problems such as no construction plan.
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[0063] Such as figure 1 Shown is a construction method for a shallow-buried underground excavation tunnel passing through a bungalow area. The tunnel hole of the shallow-buried underground excavation tunnel to be constructed is excavated from the back to the front by using the step excavation method, and the tunnel is excavated from the back to the front during the excavation process. The tunnel hole formed by excavation is used for initial support; combined with figure 2 , the tunnel hole is composed of an upper pilot hole 1 and a lower pilot hole 2 directly below the upper pilot hole 1, and the rear part of the tunnel hole is connected with the vertical shaft;
[0064] The initial support structure of the tunnel hole includes multiple grid steel frames that support the tunnel hole from the back to the front, and a layer of grid steel frame that is hung on the inner wall of the tunnel hole after the installation of the grid steel frame is completed. The reinforcement mesh a...
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