Cast-in-place box girder bottom web steel bar segmented prefabricated binding mold and binding method

Abstract

The invention belongs to the technical field of cast-in-place box girders, and discloses a cast-in-place box girder bottom web steel bar segmented prefabricated binding mold and binding method. The cast-in-place box girder bottom web steel bar segmented prefabricated binding method comprises the following steps that according to box girder span as well as bottom web steel bar sizes, steel bar spacing and models, the box girder bottom web steel bar segmented prefabricated binding mold is manufactured, carved grooves are formed at the corresponding positions on the mold for positioning; box girder bottom web steel bars are bound to the mold together in a segmented mode; the bottom web steel bars are hoisted into a formwork through a reinforcement cage hoisting tool and a gantry crane, then aprefabricated inner formwork is hoisted, and finally, on-site binding and forming are performed bridge floor steel bars. According to the method, it is ensured that the on-site binding installation interval error of a steel bar framework is controllable, moreover, the time occupied for binding the steel bars on a bottom formwork is greatly shortened, and great convenience is brought to construction.

Description

technical field [0001] The invention belongs to the technical field of cast-in-place box girders, and in particular relates to a segmental prefabricated binding mold and a binding method for the bottom web reinforcement of a cast-in-place box girder. Background technique [0002] The Puqian Sea-Crossing Bridge is the largest independent sea-crossing bridge project in Hainan Province so far. It is a key project of "One Bridge and Four Roads" in Hainan Province. The bridge is located between Puqian Town, Wenchang City, Hainan Province and Tashi Village, Haikou, with a length of 3.96 Km, two-way six-lane, among them, the Haikou side approach bridge is a prestressed concrete box girder with equal span of 50 meters, which is constructed with a downward mobile formwork. Among them, the processing and installation of steel bars is one of the key processes to ensure the quality and progress of beams and slabs. The method of installing box girder skeleton reinforcement is to draw a s...

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Problems solved by technology

[0002] The Puqian Sea-Crossing Bridge is the largest independent sea-crossing bridge project in Hainan Province so far. It is a key project of "One Bridge and Four Roads" in Hainan Province. The bridge is located between Puqian Town, Wenchang City, Hainan Province and Tashi Village, Haikou, with a length of 3.96 Km, two-way six-lane, among them, the Haikou side approach bridge is a prestressed concrete box girder with equal span of 50 meters, which is constructed with a downward mobile formwork. Among them, the processing and installation of steel bars is one of the key processes to ensure the quality and progress of beams and slabs. The method of installing box girder skeleton reinforcement is to draw a scale with paint on the formwork, and place reinforcement along the scale. This construction process must be carried out after the box girder is poured and waits for the tension and formwork to walk, close the mold, and adjust the mold. Reinforcement installation work, and this kind of flow operation will inevitably cause idle work caused by waiting, and the efficiency is low

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