Post-cast awning, prefabricated reinforced concrete frame beam and post-cast awning manufacturing method

Abstract

The invention discloses a manufacturing method for a post-cast awning on the side face of a prefabricated reinforced concrete frame beam. The manufacturing method comprises the steps that firstly, awning load-bearing bar holes are formed in the side face of a die of the prefabricated reinforced concrete frame beam, the interval is 300, and the upper part and the lower part are each provided with arow of the awning load-bearing bar holes; secondly, awning load-bearing bars are produced; thirdly, when the prefabricated reinforced concrete frame beam is manufactured and bars are bound, bar mechanical sleeves are embedded on the side face of the die according to the hole-formed positions of the die, and the embedding segments of the awning load-bearing bars are connected with the embedded barmechanical sleeves; and the exposed ends of the embedded bar mechanical sleeves are sealed, and exposed holes are blocked through rubber plugs; fifthly, after a reinforced concrete frame beam is bound completely, concrete is poured in a factory; sixthly, the prefabricated members are transported to a site; seventhly, after the prefabricated members are hoisted completely on site, awning formworkerecting is carried out; eighthly, the awning load-bearing bars and the embedded bar mechanical sleeves are connected and fixed; ninthly, load-bearing longitudinal bars, distributed reinforced bars and horizontal distributed bars are bound; and tenthly, concrete is poured. The invention further provides the post-cast awning and the prefabricated reinforced concrete frame beam.

Description

technical field [0001] The invention relates to the technical field of prefabricated construction engineering, in particular to a post-cast awning, a prefabricated reinforced concrete frame beam and a method for manufacturing a post-cast awning. Background technique [0002] In recent years, the state and local governments have vigorously promoted the process of housing industrialization. Among them, Shanghai requires that all new civil buildings within the outer ring line should be prefabricated buildings from 2016, and more than 50% outside the outer ring line; from 2017, the number outside the outer ring line will increase year by year on the basis of 50%. At the same time, the prefabricated assembly rate of prefabricated buildings built with concrete structure systems has been regulated accordingly and gradually increased. Starting from 2016, the prefabricated rate of single units will not be lower than 40%. [0003] With the development and vigorous promotion of prefab...

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Problems solved by technology

[0006] Disadvantages of this method: the stressed longitudinal reinforcement is 8@100, and there are many reinforced mechanical sleeves pre-buried in the prefabricated reinforced concrete frame beam, which is not only expensive, but also the production of the prefabricated reinforced concrete frame beam and the subsequent on-site construction of the awning are very difficult. inconvenient

[0008] Disadvantages of this method: when the prefabricated components are produced, about one meter of steel bars are thrown out from the periphery of the mold, which not only causes a large amount of steel bars to accumulate on the mold table, affecting production; The reinforced steel bars are tilted inside the mould, making it difficult to locate the reinforced bars; in addition, a large number of stressed steel bars for the awning are thrown out from the outside of the prefabricated reinforced concrete frame beam, which causes inconvenience in transportation, hoisting and construction of the precast reinforced concrete frame beam

[0010] Disadvantages of this method: 1. The post-planting reinforcement is used to connect, which will cause great damage to the original component, that is, the prefabricated reinforced concrete frame beam; 2. The cost of planting the reinforcement is high, and the construction quality is difficult to guarantee; 3. After the smooth side of the prefabricated component is planted, pouring Concrete, the contact surface between old and new concrete is poor in integrity, and it is easy to form a weak point; 4. Page 196 of the atlas "Reinforcement of Concrete Structures" (13G311-1) clearly stipulates that this method of planting bars and extending floor slabs is not applicable to new Increase the cantilever

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