Installation method of prefabricated platform

Abstract

The invention discloses a prefabricated bearing platform mounting method and relates to the field of bridge construction. The prefabricated bearing platform mounting method comprises the following steps that a bearing platform and bottom pier bodies are prefabricated in a prefabrication field, and steel pile hole positions are reserved in the bearing platform; the bearing platform is lifted to a pile site by a large floating crane; a pile top guiding device is pre-mounted on steel piles in the pile site before the bearing platform is lifted; after the bearing platform is lifted down and is in place, a carrying pole is arranged on a pile top longitudinal direction adjusting position in a hanging manner, and the horizontal plane of the bearing platform is regulated as required; and the pouring of bottom-sealing concrete of a steel cylinder cofferdam, the water pumping, the binding of reserved hole steel reinforcing bars, and the pouring of reserved hole concrete at non-lifting points and lifting points are sequentially finished, and the steel cylinder cofferdam is detached, so that the mounting of the prefabricated bearing platform is finished. According to the prefabricated bearing platform mounting method disclosed by the invention, a small steel cylinder cofferdam replaces a large bearing platform steel cofferdam, so that the steel material can be effectively saved, the on-water operation time is shortened, and the construction cost is reduced; and meanwhile, the influence of water flow to the construction of the bearing platform is reduced, and the construction quality of the bearing platform is ensured.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a method for installing a prefabricated cap. Background technique [0002] With the development of economy and society, the construction of cross-sea bridges has gradually become the theme of bridge construction. Since the geographical location of the cross-sea bridge has a special marine climate - strong winds, high waves, rapid currents, frequent typhoons and natural disasters, and the cross-sea bridge spans a long distance with a large number of pier caps, in order to overcome this Due to the various adverse effects of marine climate characteristics, when formulating construction plans and measures, the time for water operations should be reduced as much as possible, and water construction should be changed to land construction, forming "large-scale construction equipment, factory-based bridge components, standardized production processes, and bridge construction. The "four...

AI Technical Summary

Problems solved by technology

However, in the existing construction methods of bridge caps in China, large-scale steel cofferdams are still mainly cast-in-situ. Although there are also examples of prefabricated installation of caps, most of them are only prefabricated cap shells, and the cap shells are used as cofferdams. Hoisting and lowering, the concrete inside the cap is poured after the cap is lowered into place. For the above-water construction in areas with strong wind and waves, auxiliary steel cofferdams are still required. The entire construction period is longer, and the time for water operations has not been shortened.

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