Pre-reinforcement and excavation construction method for tunnel entrance segment of loess tunnel passing through slip mass
A technology of loess tunnels and construction methods, which is applied in tunnels, earthwork drilling, infrastructure engineering, etc., and can solve problems such as difficult construction, interference, and tunnel structure damage
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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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