Pressure-grouting construction method for structure consolidation

Abstract

The invention relates to a building construction method, in specific to a pressure grouting construction method for structural reinforcement in execution with a reverse operation method. The inveintion comprises the following steps: First of all, perform pre-treatment for reinforcement structural columns; then, make steel forms outside the structural columns, and open grouting ports and air exhausts on the form panels; meanwhile, connect a grouting device and a semi-U shaped tube on a secondary pressure device respectively with the grouting ports and the air exhausts; after the grouting is over and the grout material inside the steel form is initially hardened, the device grouting can fulfill secondary compression for the structural columns through arranging a hydraulic jack; thus, the invention can always guarantee certain pressure maintained on the grouting material during the period that starts with the beginning of grouting, and ends in the intial hardening of the grout material; meanwhile, the inventioin can also ensure compaction rate of the grouting material itself, and that of horizontal joints in vertical structural members. The invention adapts in particular to the following condition: In building reconstruction work, reinforcement is firstly executed from the center or top of structural members, so that it is not possible to perform concrete casting execution as usual from the top to the bottom of structural base layers.

Description

technical field [0001] The invention relates to a building construction method, in particular to a construction method for performing secondary pressure grouting under the condition of reverse construction. Background technique [0002] In the process of building reconstruction, the bottom-up construction process from the bottom of the structure is conventionally adopted, and the structure is reinforced by free grouting or one-time pressure grouting. This traditional reinforcement construction method uses the self-weight of the concrete to ensure the joints at the joints. Dense, therefore, only suitable for straight method construction. For special working conditions and construction schedule requirements, building reconstruction and reinforcement needs to be constructed from the middle or upper part of the structure first, and it is impossible to carry out construction from the bottom to the top of the structure as usual. If the conventional free grouting or one-time pressu...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a pressure grouting construction method for structural reinforcement, which applies a certain pressure to the grouting material from the beginning of grouting to the initial setting of the grouting material for a period of time to ensure the grouting material itself. The compactness and the compactness of the horizontal joints of the upper and lower structural columns, so as to overcome the conventional free grouting or one-time pressure grouting construction method that cannot meet the density of the horizontal joints of the adjacent upper and lower structural columns, which affects the effective force transmission of the vertical structure And other issues

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