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

Abstract

The invention relates to a construction method of a bearing platform-beam column joint replacement advance reinforcement hoop structure. Shortcomings that the existing bearing platform becomes a joint weak region in a basement storey adding project, and large potential safety hazards of the project are easily caused are overcome. The construction method comprises the following steps of A, manufacturing a first-stage hoop structure; B, manufacturing a second-stage hoop structure; and C, dismounting the first-stage hoop structure and chiseling off bearing platform concrete on the outer side of an anchor rod of the second-stage hoop structure. Through stretching of the anchor rods and slip casing by pressure, mechanical performance of the hoop structures is controlled accurately, and joint load carrying of concrete of original core regions of the closed hoop structures and a bearing platform is guaranteed. In whole construction, safety and adaptation are high, bearing platform-beam column core region structure replacement can be finished under the condition that functions of an upper structure are not affected, and various detailing requirements on beam column joints and actual stress requirements in a basement storey-adding projection in Chinese standards can be met.

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 and reinforcing hoop structures at 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 number of horizo...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the defect that the existing cap becomes a node weak area in the basement layer-adding project, which is likely to bring relatively large safety hazards to the project, and provides a construction method for the cap-beam-column node replacement and reinforcement hoop structure in advance, The cap is strengthened by a hoop structure that reinforces the cap, thereby improving the safety of engineering node replacement

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