Secondary lining construction trolley for enlarged section of tunnel opening

Abstract

The invention discloses a secondary lining construction trolley for an enlarged section of a tunnel opening. The problem that an existing secondary lining trolley cannot conduct secondary lining construction on a horn-shaped opening with the large exterior and the small interior is solved. Vertical angle steel supporting seats (13) arranged in the vertical direction are arranged on the outer sidesurfaces of two vertical columns of a portal frame (3) of the trolley. Lateral double-head lead screws (15) are arranged on the vertical angle steel supporting seats (13) in the vertical direction atintervals. The inner side ends of the lateral double-head lead screws (15) are connected to hinge holes (14) in the inner side ends of the lead screws. A lateral jacking block connecting through beam(16) is connected to the outer side end of each lateral double-head lead screw (15). Lateral arc-shaped jacking blocks (17) are arranged on the outer side surfaces of all the lateral jacking block connecting through beams (16) at intervals correspondingly. All top arc-shaped sliding blocks (9) and the lateral arc-shaped jacking blocks (17) on the same section are sequentially connected in series to form an arc-shaped jacking block chain, and the purposes of short period and high construction quality in secondary lining construction of the opening are achieved.

Description

technical field [0001] The invention relates to a trolley for constructing secondary lining at a tunnel opening, in particular to a trolley for constructing secondary lining at an enlarged section of a tunnel opening. Background technique [0002] The entrance of mountain tunnels (generally about 100 meters in length) is generally set in the shape of a tapered bell-shaped structure with a large outside and a small inside to reduce the wind resistance when the train enters the tunnel. When constructing the secondary lining of this section of the tunnel, the "full house" support is usually used to assemble the small formwork for the secondary lining. This construction method has the disadvantages of cumbersome procedures for erecting the "full house" support, heavy workload and long construction period. Moreover, the "full house" support seriously hinders the tunnel construction equipment from entering and exiting the tunnel. After the secondary lining is completed, the "full ...

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