Combined pre-embedded part for concrete wall and column tie bars and its installation and construction method

Abstract

The invention discloses a combined built-in fitting for concrete walls and column tie bars and an installation construction method of the combined built-in fitting. An iron plate strip, parallel thread sleeves and anchoring bars form the combined built-in fitting for the concrete walls and the column tie bars. The built-in fitting is strapped or welded on a steel reinforcement framework, or the built-in fitting is nailed on the inner side of a timber formwork through nails according to the adoption of different formworks. Tie bars penetrate into the pre-buried parallel thread sleeves in a parallel-thread mode after formwork removal, and installation construction of the tie bars is finished. Installation construction of the concrete walls and the column tie bars is completed through the steps of massive and shaping production of the combined built-in fitting, positioning of built-in fitting locations, supports, wall forms, installation of the built-in fitting, concreting, installation of the tie bars after the formwork removal and the like. The combined built-in fitting for the concrete walls and the column tie bars is reasonable and simple in structure, easy to produce and manufacture, convenient to operate and low in cost. Assembling production and installation of the built-in fitting are convenient, operation is simple, construction is convenient, quality can be controlled conveniently, forming effect of concrete is good, and pulling resistance of the tie bars can be effectively guaranteed. Accurate locations of the tie bars are ensured, work efficiency and quality stability are improved, and good social and economic benefits are achieved.

Description

technical field [0001] The invention relates to a structural structure and an installation and construction method of a shaped product of a straight thread sleeve and an iron lath combination embedded part. The combined embedded part is used for the construction of concrete tie bars in construction engineering and belongs to the technical field of building steel bars. Background technique [0002] At present, in the construction of concrete walls and column tie bars in construction projects, several common construction methods such as reserved tie bars in concrete structures, welding of pre-embedded steel plates or thick steel bars, and chemical planting of bars are widely used. In the process of engineering construction practice, we found that the above methods have insurmountable technical defects and hidden quality risks, and the construction process is cumbersome. The main problems are as follows: [0003] 1. Reserve tie bars in the concrete structure [0004] (1) The t...

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Problems solved by technology

[0004] (1) The template is damaged due to reserved holes, and the position is not easy to control;

[0005] (2) When the concrete is poured and shaken, it is easy to cause the tie bars to loosen and slide down, causing deviation;

[0006] (3) The concrete surface is damaged when the tie bars are removed after the formwork is removed, and the steel bars are not easy to straighten;

[0007] (4) The weld length and welding quality are not easy to control when the tie bars are welded

[0009] (1) Welders are required to perform more follow-up operations, which consume more labor and cost more;

[0010] (2) The weld length and weld quality are not easy to control;

[0011] (3) The pull-out strength is unstable, and the pass rate of the pull-out test cannot meet the requirements

[0013] (1) The drilling operation during the planting of the bars has caused certain damage to the surrounding concrete; (2) If the holes are not cleaned cleanly, the bonding force between the structural adhesive and the concrete will be significantly reduced; If the glue is not full, the actual anchoring depth will be reduced; (4) There are problems with the quality stability of the structural glue itself; (5) External conditions such as temperature, humidity, and vibration are unfavorable to the durability of the structural glue;

[0014] (6) It is easy to cause shaking damage during wall construction in the later stage

[0015] Among them, the most important point for chemical planting bars is point (5). Generally, the epoxy resin structural adhesive used will produce brittle cracks when the structure vibrates, which directly leads to a serious decline in the pull-out resistance of the tie bars. The ability to resist earthquakes plummets

The earthquake damage investigation of the Wenchuan Earthquake in Sichuan shows that the wall tie bars are very important for the seismic fortification of construction projects, directly affecting the safety of people's lives and property. In addition, the positioning of chemical planting bars during construction is inaccurate and the hole depth is insufficient. , drilling unclear and other phenomena will indirectly affect the seismic performance of the structure

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