Construction technology for cantilever type U-shaped bent cap and precast beam component

Abstract

The invention relates to a construction technology for a cantilever type U-shaped bent cap and a precast beam component. According to the construction technology for the cantilever type U-shaped bentcap, integral non-support construction of the cantilever type U-shaped bent cap is conducted through manners that staging prefabricated casting is adopted on the whole, and steel tendons are tensionedgradually in each state. The construction technology for the cantilever type U-shaped bent cap comprises the steps that a U-shaped beam component is prefabricated firstly; casting grooves with periphery totally-enclosed are formed in the U-shaped beam component; pre-buried casing pipes are installed at the bottom of the U-shaped beam component and the corresponding middle positions of bridge piers; the first batch of prestressed steel tendons are tensioned on the U-shaped beam component; the prefabricated U-shaped beam component is moved to the bridge piers; reserved steel bars in the bridgepiers penetrate through the pre-buried casing pipes in the beam component and stretch into the casting grooves; and hollow portions of the casting grooves of the beam component is cast in situ, the second batch of prestressed steel tendons are tensioned correspondingly, and pore channels are reserved for next-stage prestressed tensioning. By means of the construction technology for the cantilevertype U-shaped bent cap, higher efficiency of construction production, the lower cost and simple on-site transportation operation of the bent cap are achieved.

Description

technical field [0001] The invention relates to a construction technique of a cantilevered horseshoe-shaped cover beam and a prefabricated beam component. Background technique [0002] With the construction of modern cities, municipal engineering has also developed rapidly, and the requirements for construction quality and efficiency are getting higher and higher, and the impact on traffic is becoming more and more serious. The cantilevered cover beam is generally constructed by prefabricated hoisting, but due to its large weight and large component volume, it has high requirements for hoisting machinery and transportation machinery, and at the same time has high requirements for the accuracy of the construction work surface and hoisting positioning. It has a great impact on traffic, so construction is inconvenient and inefficient. In the prior art, the support for the construction cover beam is erected on site, the formwork for the construction of the cover beam is install...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction process of a cantilevered horseshoe-shaped cover beam to solve the problems of low efficiency, high cost and complicated on-site transportation operations in the construction process of the cantilevered cover beam in the prior art; The purpose is also to provide a prefabricated beam member of the cantilevered horseshoe-shaped cap beam

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