Construction process for overhead back-up movement and dismantlement of movable shuttering form

Abstract

The invention belongs to the field of bridge construction processes, is applied in the construction of a movable shuttering form for a cast-in-place box girder, and particularly relates to a construction process for the overhead back-up movement and dismantlement of a movable shuttering form after a cast-in-place box girder is completely constructed by the movable shuttering form. The process is characterized in that: a back guide girder, a main beam, a front guide girder, a bracket, a cart, an external mould plate, a mould plate beam, a middle beam and bracket tensioning fining twisted steelon both sides of the bride need to be removed; the cart transversely moves on the bracket to open the movable shuttering form, a winder is arranged on a concrete box girder, the external mould plate is removed by the winder and by the drawing and hoisting operation of a truck crane, the mould plate beam and the middle beam are removed from the top to the bottom in sequence, only the back guide girder, the main beam and the front guide girder remain, the main beam of the movable shuttering form is removed, and finally the last section of main beam and the front guide girder are moved. The process has the advantages of speeding up the construction, reducing construction equipment, guaranteeing the construction safety and lowering construction cost.

Description

technical field [0001] The invention belongs to the field of bridge construction technology, and is applied to the construction operation of a cast-in-place box girder with a mobile formwork. Specifically, after the cast-in-situ box girder is constructed using a mobile formwork, the mobile formwork is retrograde, dismantled and removed in the air. Background technique [0002] With the development of the economy, the number of cross-river, river-crossing and sea-crossing bridges continues to increase. Mobile formwork is widely used in engineering because of its unique advantages. The construction technology is relatively mature, but there has been no good experience in the removal of mobile formwork. . The traditional method of dismantling the mobile formwork is to level the site or build a construction platform, then lower the mobile formwork and dismantle it with a crane on land or on the platform. This method is suitable for low piers. When the pier body is high, it is a...

AI Technical Summary

Problems solved by technology

When the pier body is high, it is also possible to lock and remove the entire main girder of the mobile formwork at high altitude, but anchoring and lowering the main girder, front and rear guide beams need to reserve many reserved holes on the concrete box girder, which will cause great damage to the concrete box girder. Simultaneously transfer and dismantle equipment multiple times, wasting time

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