Support-free primary and secondary beam system, construction method thereof and prefabricated superposed main beam notch mold

Abstract

The invention relates to a support-free primary and secondary beam system, a construction method thereof and a prefabricated superposed main beam notch mold. The support-free primary and secondary beam system comprises a prefabricated superposed main beam and a prefabricated superposed secondary beam, the cross section of any position of the notch area of the superposed main beam is inverted T-shaped, grooves with pressure-bearing steel plates are formed in the upper surfaces of supporting blocks arranged on notches, and an embedded steel connecting piece corresponding to the grooves is arranged at the end part of the superposed secondary beam. The construction method of the support-free primary and secondary beam system mainly comprises the following steps of mounting the superposed mainbeam in place; then bedding mortar on the contact bottom surface between the superposed main beam and the superposed secondary beam; hoisting the secondary beam; and finally carrying out grouting at ajoint. The superposed main beam notch mold comprises a notch mold body and a hanging lug, the notch mold body is n-shaped, and stiffening ribs or sub-bin type cavities can be arranged inside the notch mold body. According to the support-free primary and secondary beam system, the construction method thereof and the prefabricated superposed main beam notch mold, the beneficial effects that structural design is conducted at the joint between the main beam and the secondary beam, the force transmission reliability of the joints in the construction stage can be improved, the enough adjusting capacity is achieved, and supporting-free and formwork-free construction is achieved.

Description

technical field [0001] The invention relates to the technical field of building components, in particular to a support-free primary and secondary beam system, a construction method thereof, and a prefabricated laminated main beam notch mold. Background technique [0002] When prefabricated composite beams are used in existing prefabricated concrete buildings, support is usually required during the construction phase. When the floor height is large or a jump column is set, the support system is complicated and expensive. Therefore, in order to speed up the construction and reduce the cost of project measures, the bracing-free design of prefabricated composite beams and their joints is very valuable. [0003] Conventional prefabricated laminated primary and secondary beam connection nodes are provided with through notches at the main beam so that the secondary beam reinforcement can be connected at the joints. This structure makes the section shear load of the prefabricated l...

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Problems solved by technology

[0003] Conventional prefabricated laminated primary and secondary beam connection nodes are provided with through notches at the main beam so that the secondary beam reinforcement can be co

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