A kind of steel bar connection method of prefabricated concrete member and its application

Abstract

The invention discloses a steel bar connection mode of precast concrete components and the application thereof. The steel bar connection mode is characterized in that connecting ribs which are arranged in a connection area located between the two precast components are U-shaped ribs which are bent into a U shape through straight ribs; at least one end of the U-shaped ribs are pre-embedded in each precast component to form U-shaped connecting ribs which extend on the end portion of the precast component; the U-shaped connecting ribs which extend out of the two precast components are arranged in a staggered mode and are in overlapping joint with each other to form rectangular frames which are located at the same vertical position; vertical straight ribs which are located in four corners of every rectangular frame respectively are connected between the rectangular frames in series to form a rectangular steel bar cage. The steel bar connection mode of the precast concrete components and the application thereof can be widely applied to the precast floor slab components and precast shear wall connection components, the existing composite floor slabs can be replaced by the integral floor slabs, the connection is reliable, the integrity is high, the requirements for the bearing capacity are met, the reduction of the precast component types is facilitated, and the implementation of the industrialized production is facilitated.

Description

technical field [0001] The invention relates to a steel bar connection method and application of prefabricated concrete components, more specifically, a connection method and application of prefabricated concrete components used in prefabricated buildings. Background technique [0002] At present, in my country's prefabricated shear wall residences, a conventional way of connecting the steel bars of precast concrete shear wall components is "plug-in reserved hole grouting steel bar connection lap joint", which is the lower end of the pre-embedded steel bars in precast concrete components. A hole with a rough surface such as corrugated or spiral is reserved on the inner wall. After the precast concrete member is installed, the overlapping steel bar is inserted into the hole at the same time to the set lap length, and passes through the grouting hole and the vent hole connected to the hole. The grouting material is poured into the hole, and the connection of the steel bar is rea...

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Problems solved by technology

[0003] 1. The form of the plug-in reserved hole requires accurate positioning of the on-site steel bars without deviation, otherwise it is difficult to insert the steel bars into the reserved holes accurately. Before hoisting, manual correction must be carried out, but the correction process not only increases the workload, but also may damage the steel bars due to the correction, thereby affecting the performance of the steel bars

[0004] 2. The reserved hole is a closed hole throughout the whole process, and the structure inside the hole cannot be seen by the naked eye. During the whole process of pouring grouting material into the hole, it is impossible to judge whether the grouting material is tightly filling the entire hole, which makes the steel bar and prefabricated It is uncontrollable whether the connection of the components is reliable, and in the cast-in-place structure, the concrete needs to be vibrated with a vibrating device, but in this way, there is no vibration process, which leads to the uncontrollable density of the grout

[0005] 3. The connection of the longitudinal reinforcement requires that the length of the reinforcement inserted into the hole should reach a depth not less than 30 times the diameter of the reinforcement, and the spiral stirrups should be arranged around the hole, and the height of the spiral stirrups should not be less than the lap length of the tensile reinforcement. Obviously not conducive to the saving of steel bars

[0011] 1. The grouting construction quality of "plug-in reserved hole" is not easy to control and the inaccurate positioning of reserved steel bars affects the reliability of the project

[0012] 2. The laminated floor structure is self-heavy and wastes concrete. The proportion of prefabricated components is only 50%, and the proportion of wet work is relatively large.

[0013] 3. The plug-in reserved hole grouting reinforcement connection lap connection and the lattice reinforcement connection method of the laminated floor are two completely different connection methods and are not universal

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