A double-steel tongue-and-groove connection structure of prefabricated ladder beams and its construction method

Abstract

This application relates to a double-steel tongue-and-groove connection structure for prefabricated ladder girders, including a first connecting plate and a second connecting plate. And relatively arranged on the prefabricated component, the first connecting plate and the second connecting plate are opposite, the connecting structure also includes a sealing cover and a fixed screw, the sealing cover is arranged on the prefabricated component adapted to the connecting structure, the first connecting plate and the second connecting plate are located in the blocking cover, the first connecting plate and the second connecting plate are provided with connecting hole grooves on the opposite side walls, and the side wall of the blocking cover opposite to the connecting hole groove is provided through. There is a penetration hole, the connection hole and the wall of the penetration hole are threadedly connected with the fixed screw, and the end of the fixed screw protruding from the penetration hole is provided with a grouting channel, and the grouting channel is located in the sealing cover A slurry outlet is provided through the wall of the hole. The application can improve the connection stability between the prefabricated ladder girder and the prefabricated components.

Description

technical field [0001] The application relates to the field of prefabricated ladder beam construction, in particular to a double-steel tongue and groove connection structure of a prefabricated ladder beam and a construction method thereof. Background technique [0002] The prefabricated ladder beam construction is an important step in the construction process of the prefabricated staircase. The prefabricated ladder beam construction is carried out before the stair hoisting. The voids are cast and sealed together. [0003] The Chinese patent with publication number CN210105157U discloses a double-steel tongue-and-groove connection node of a prefabricated prefabricated ladder beam, including a prefabricated ladder beam and a prefabricated vertical member, and two parallel installations are pre-buried at the same height of the prefabricated ladder beam. The exposed end of the steel tongue has connecting holes, and the prefabricated vertical members have bolt embedded parts for...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that: after the connection between the conversion steel bracket and the double-steel tongue and groove is completed in the above patent, the bracket needs to be sealed with mortar to prevent subsequent problems such as corrosion and bolt slippage. , while the mortar has fluidity, it is easy to cause the mortar to not be wrapped well, which affects the connection stability of the prefabricated ladder beams and prefabricated components

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