Construction method of pre-reinforcement and excavation for entrance section of loess tunnel passing through landslide
A technique for loess tunnels and construction methods, which is applied in tunnels, earthwork drilling, infrastructure engineering, etc., and can solve problems such as tunnel construction safety hazards, interference, and tunnel body displacement
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[0139] Such as figure 1 Shown a kind of pre-reinforcement and excavation construction method of the loess tunnel entrance section passing through the landslide body, the construction tunnel entrance section 10 is a straight tunnel section passing through the landslide body 1-4 to be treated, and the straight tunnel section The front end of the tunnel is the tunnel entrance 2 and its rear end is the rear end of the entrance section. For details, see figure 2 ; The rear part of the landslide body 1-4 to be controlled is supported above the front part of the upper soil layer 14, and the front part of the upper soil layer 14 is a slide bed positioned at the bottom of the landslide body 1-4 to be controlled, and the landslide body to be controlled is Body 1-4 is the landslide body of the loess landslide and it is a landslide body that slides from back to front on the slide bed; the front and middle parts of the landslide body 1-4 to be treated are all supported on the lower soil l...
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