Tunnel inverted arch side wall integral steel formwork and construction method thereof

Abstract

The invention discloses a tunnel inverted arch side wall integral steel formwork, and belongs to the technical field of tunnel construction. The tunnel inverted arch side wall integral steel formwork comprises a steel formwork main body, the steel formwork main body adopts a welded steel frame structure with the cross section being a closed ring; the top face, the outer side face and the bottom face of the steel formwork main body are wrapped by adopting steel plates, the contour of the outer side face is matched with the contour of a to-be-poured tunnel inverted arch side wall, a reinforced steel support is welded to an inner cavity of the steel formwork main body, a plurality of water stop hanging frames are welded in the extending direction of the steel formwork main body at intervals, the water stop hanging frames are welded to the position, close to the outer side, of the top of the steel formwork main body, and extend towards the position above the outer side, and a water stop fixture for fixing a corresponding water stop is mounted below each water stop hanging frame. The tunnel inverted arch side wall integral steel formwork is simple in structure, reliable in rigidness and enough in self-weight, and can prevent the steel formwork from deforming and displacing in the construction process, construction workers can walk on the steel formwork, and a water stop fixing function is further achieved. Meanwhile the invention further discloses a construction method of the tunnel inverted arch side wall integral steel formwork.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an integral steel form for pouring tunnel inverted arch side walls and a construction method thereof. Background technique [0002] At present, in the construction process of tunnel inverted arch side walls, most of them use channel steel or planks and steel bar supports to form inverted arch side wall formwork. This method is simple to operate and has a single process flow. But there are following deficiencies in existing steel mold and construction process: [0003] (1) Affected by the insufficient rigidity of the steel mold, the steel mold is prone to deformation and displacement during the concrete construction process. After the pouring is completed, the line shape of the inverted arch side wall is poor, and the appearance quality cannot meet the specification requirements; [0004] (2) Due to the insufficient rigidity and self-weight of the steel mold, in order...

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Problems solved by technology

[0003] (1) Affected by the insufficient rigidity of the steel mold, the steel mold is prone to deformation and displacement during the concrete construction process. After the pouring is completed, the line shape of the inverted arch side wall is poor, and the appearance quality cannot meet the specification requirements;

[0004] (2) Due to the insufficient rigidity and self-weight of the steel mold, in order to ensure that the steel mold does not deform and shift as much as possible, the concrete pouring process of the inverted arch side wall cannot be sufficiently vibrated, resulting in insufficient vibration of the concrete, which seriously affects the quality of the concrete entity;

[0005] (3) Affected by the rigidity of the steel mold, personnel cannot walk on the steel mold, and the operable range of vibration is small, which is not conducive to the compaction of concrete;

[0006] (4) Affected by the rigidity of the steel mold, it is necessary to set up additional reinforcement brackets to fix the steel mold during the construction process, resulting in large material loss, many construction workers are required, and low construction efficiency;

[0007] (5) The steel mold does not have the function of fixing the waterstop, and it is necessary to set up welding ribs or steel wires and iron wires separately for fixing the waterstop

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