Advance support device for pipe shed of large-span metro tunnel portal

The utility model provides an advance support device for a pipe shed of a large-span metro tunnel portal, and solves the problems that a large steel pipe of the conventional pipe shed advance support device is difficult to control, and the pipe shed is limited in the slurry injection reinforcement r...

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Bibliographic Details
Main Authors YAN XUEFENG, FAN YANXIANG
Format Patent
LanguageChinese
English
Published 21.11.2012
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Summary:The utility model provides an advance support device for a pipe shed of a large-span metro tunnel portal, and solves the problems that a large steel pipe of the conventional pipe shed advance support device is difficult to control, and the pipe shed is limited in the slurry injection reinforcement range. The advance support device comprises a tunnel face (1), wherein cambered I-shaped steel (2) is arranged above the tunnel face (1) along a digging cambered line; orifice bushings (5) are arranged on the top of the cambered I-shaped steel (2) at equal intervals; a large-aperture steel pipe (4) is arranged in each orifice bushing (5); a fixing rib (6) is welded between the side wall of each large-aperture steel pipe (4) and each orifice bushing (5); the large-aperture steel pipes (4) are upwards inclined by 1 to 3 degrees along a tunnel digging direction; and slurry injection holes are formed in the large-aperture steel pipes (4). By the advance support device, a large pipe shed advance slurry injection support
Bibliography:Application Number: CN20112546989U