Construction method of cap-beam-column joint replacement for advance reinforcement hoop structure

Abstract

The invention relates to a cap-beam-column node replacement advanced reinforcement hoop structure, which solves the defect that the existing cap becomes a weak node area in the basement layer-increasing project, which easily brings great safety hazards to the project, including the final The hoop structure of the first stage to be dismantled and the hoop structure of the second stage finally retained. The hoop structure of each stage adopts the same structure, including the through hole drilled through the cap, the anchor rod passing through the through hole at both ends and the The protruding end of the anchor rod is fixed to the hoop steel plate, and the anchor rod and the hoop steel plate of each stage of the hoop structure are multi-layer structures. The hoop structure of the first stage strengthens the weak area of ​​the cap joint in advance, and the hoop structure of the second stage finally strengthens the weak area of ​​the cap joint. Through the two-stage hoop structure, the outer dimension of the cap can be reduced without affecting the weak joint of the cap The structural safety of the area is improved, and finally the nodes that meet the size of the column bottom are obtained, thereby improving the safety of engineering node replacement.

Description

technical field [0001] The invention relates to the field of adding floors to basements of existing buildings, in particular to a construction method for replacing an advanced reinforcement hoop structure with cap-beam-column nodes. Background technique [0002] In order to alleviate the contradiction of insufficient land use in the city center, increasing attention has been paid to the underground addition of existing buildings. One of the difficulties in the underground layer-adding project is that the original foundation must be replaced without affecting the safety of the superstructure. For existing buildings originally designed as pile foundations, it is common to replace the pile caps with beam-column joints on the basement floor. [0003] In the replacement process of the cap-beam-column joint structure, since the design and structure of the cap and the beam-column joint stipulated in the codes of our country are quite different in many aspects, especially the numbe...

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Problems solved by technology

[0004] The invention solves the defect that the existing cap becomes a node weak area in the basement building-up project, which is likely to bring relatively large safety hazards to the project, and provides a construction method for replacing the cap-beam-column node in advance to reinforce the hoop structure , the cap is strengthened through a hoop structure to strengthen the cap, so as to improve the safety of engineering node replacement

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