Hole-entering construction method for slowly-inclined stratum tunnel
The invention discloses a construction method for entering a tunnel into a hole in a slowly-inclined stratum. The method comprises the following steps that a tunnel is excavated in a slowly-inclined stratum, a guide wall is arranged, an advanced pipe shed is constructed, then a soil body is excavate...
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| creator | ZHAO GANGYING HU ENLAI LI XINWANG WANG HUALING YAN FEIYUE |
| description | The invention discloses a construction method for entering a tunnel into a hole in a slowly-inclined stratum. The method comprises the following steps that a tunnel is excavated in a slowly-inclined stratum, a guide wall is arranged, an advanced pipe shed is constructed, then a soil body is excavated, the pipe shed is constructed before excavation, and the soil body is obliquely divided into blocks and obliquely excavated when the soil body is excavated, so that upward slope excavation is reduced, and the tunnel enters a hole early; for an inclined stratum, the direction of the maximum principal stress is parallel to the slope surface, the arch frame adopts an inclined vertical arch, and the inclination direction is parallel to the slope surface, so that the stress of the arch frame is parallel to the direction of the maximum principal stress, and the stress of the arch frame is most beneficial. The method has the advantages and beneficial effects that (1) earth excavation at the hole is reduced, even zero ex |
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The method comprises the following steps that a tunnel is excavated in a slowly-inclined stratum, a guide wall is arranged, an advanced pipe shed is constructed, then a soil body is excavated, the pipe shed is constructed before excavation, and the soil body is obliquely divided into blocks and obliquely excavated when the soil body is excavated, so that upward slope excavation is reduced, and the tunnel enters a hole early; for an inclined stratum, the direction of the maximum principal stress is parallel to the slope surface, the arch frame adopts an inclined vertical arch, and the inclination direction is parallel to the slope surface, so that the stress of the arch frame is parallel to the direction of the maximum principal stress, and the stress of the arch frame is most beneficial. 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| language | chi ; eng |
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| subjects | EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS |
| title | Hole-entering construction method for slowly-inclined stratum tunnel |
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