Assembly type reinforced concrete main beam and secondary beam connecting structure and construction method

Abstract

The invention discloses an assembly type reinforced concrete main beam and secondary beam connecting structure and a construction method, the assembly type reinforced concrete main beam and secondary beam connecting structure comprises two prefabricated main beams, a prefabricated secondary beam is arranged between the two prefabricated main beams, prefabricated main beam post-pouring section concrete is arranged on the prefabricated main beams, prefabricated secondary beam post-pouring section concrete is arranged above the prefabricated secondary beam, and the prefabricated secondary beam post-pouring section concrete is arranged above the prefabricated secondary beam. Through holes are formed in the prefabricated main beams, and bottom steel bars are arranged at the two ends of the prefabricated secondary beams. And post-pouring concrete is arranged in the through hole. The construction method comprises the following steps that A, the prefabricated secondary beam is hoisted to the position above the position between the two prefabricated main beams; b, bottom steel bars at one ends of the prefabricated secondary beams are obliquely inserted into the through holes of the prefabricated main beams; c, the posture of the prefabricated secondary beam is adjusted to be in a horizontal state; d, translating the prefabricated secondary beam to an accurate position; e, post-cast section steel bars of the prefabricated main beams and the prefabricated secondary beams are bound; and F, pouring is conducted on the post-pouring sections of the prefabricated main beam and the prefabricated secondary beam and the hole openings of the through holes. The method has the characteristic that the construction difficulty can be effectively reduced.

Description

technical field [0001] The invention relates to a connection structure between an assembled main beam and a secondary beam, in particular to a connection structure and a construction method of an assembled reinforced concrete main beam and a secondary beam. Background technique [0002] Regarding the connection of the prefabricated reinforced concrete prefabricated main beam and the prefabricated secondary beam, there are four usual methods: 1) Reserve a back pouring groove at the prefabricated main beam, and complete the connection between the main and secondary beams through the on-site pouring of concrete in the post pouring groove. , The disadvantage of this approach is that the gap on the main beam is the weak part of the main beam, which is prone to damage during transportation and hoisting, affecting the bearing capacity of the main beam, and the technical reliability is not high. [0003] 2) The post-casting section is set at the end of the secondary beam, which can ...

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Problems solved by technology

The post-cast section connection method at the end of the secondary beam can effectively ensure the integrity of the main beam, and the process cost is low, but the construction of the steel bar connection at the bottom of the secondary beam is difficult. Screwed in, and the sleeves cannot be staggered due to the joints, which need to reach the first-level joints. It is difficult to meet the requirements on the construction site. The lapping of the reserved steel bars of the main beam will cause great inconvenience in the production and transportation of components.

[0004] 3) The shelving prefabricated primary and secondary beam connections can be divided into steel corbels and concrete corbels according to the form of corbels. Concrete corbels have better integrity and durability, but the production of components is more difficult. The corbel reinforcement needs to be considered separately. Difficult to design and demould

Compared with concrete corbels, steel corbels are convenient for component production, but steel corbels have poor fire resistance, are easy to corrode, and have poor durability, and there are risks in the quality of large-scale on-site welding, and weld inspection also affects on-site progress

[0005] 4) The connecting joint of the supporting board. Although the joint of the supporting board has grouting operation, it does not involve concrete pouring. The integrity of the primary and secondary beams is good, and the construction convenience is high. , leave the notch for the cattle support board, leave the notch for the secondary beam, etc., the production of components is difficult

[0006] Above-mentioned four kinds of methods all exist the problem that construction difficulty is big

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