Prefabricated assembled pier stud with main reinforcements connected through steel column welding and construction method of prefabricated assembled pier stud

Abstract

The invention relates to a prefabricated assembled pier stud with main reinforcements connected through steel column welding. The prefabricated assembled pier stud comprises a concrete pier stud, longitudinal main reinforcements, connecting steel columns and circumferential stirrups; the concrete pier stud is divided into an upper concrete pier stud and a lower concrete pier stud, and the longitudinal main reinforcements and the circumferential stirrups are arranged in the upper concrete pier stud and the lower concrete pier stud; each connecting steel column is a steel pipe or a steel box defined by steel plates; the longitudinal main reinforcements in the lower concrete pier stud are welded to the inner side or the outer side of the corresponding connecting steel columns; and the longitudinal main reinforcements extending out of the upper concrete pier stud are welded to the outer side of the corresponding connecting steel columns. Through welding of the longitudinal main reinforcements and the connecting steel columns, the problem of connection between pier stud sections is effectively solved, the problems that the quality is not easy to control and check when a grouting sleeveis adopted are solved, stress transmission between pier studs is more reasonable, assembly type pier stud integration is achieved, and the overall stress performance and the anti-seismic property of the assembly type pier stud are guaranteed.

Description

technical field [0001] The invention relates to a prefabricated assembled pier column whose main reinforcement is welded and connected by a steel column and a construction method thereof, and relates to the technical field of civil engineering. Background technique [0002] At present, most of the construction methods of the lower pier columns of bridges are still cast-in-place, but there are still some shortcomings in this construction method, such as many processes, from the pier column reinforcement binding, formwork installation, concrete pouring to curing, it takes at least ten days, In addition, a large number of formwork is required, the concrete is inconvenient to vibrate, the workload on site is large, and the construction progress cannot be guaranteed; the pier column concrete poured on site needs to be vibrated manually, the compactness is low, the impermeability is poor, and the pier column steel bars are easily corroded , the thickness of the protective layer is...

AI Technical Summary

Problems solved by technology

At present, the connection between piers is mainly connected by grouting sleeves. However, during construction, there are often phenomena such as insufficient grouting, missing grouting, cut off or dislocation of steel bars due to foreign objects in the sleeves or irregular grouting operations. Furthermore, the connection strength cannot be guaranteed, which eventually leads to damages such as steel bar pulling out, grouting material splitting damage, grouting material pulling out damage, and sleeve being broken; in addition, the cost of grouting sleeve is relatively high, which requires a large amount of grouting during construction. In the prefabricated buildings connected by sleeves, the engineering cost is increased. Therefore, in order to reduce costs, some projects have secretly changed the type of grouting materials, artificially falsified the observation holes of grouting materials, and replaced high-priced grouting sleeves with low-priced counterfeit products. In turn, there are quality hazards and even quality accidents in the prefabricated buildings constructed. At the same time, whether the sleeve grouting is full or not directly affects the shear bearing capacity and earthquake resistance of the structure. degree of detection

However, the structure of the grouting sleeve is alternately made of metal and non-metallic multi-layer media, and the thickness of the mortar body in the radial direction is very thin. Most of the existing engineering detection methods cannot effectively detect it. Therefore, in actual construction, the sleeve The filling degree and grouting quality of the inner grouting material are often judged by experience, ultrasonic, ray and other detection methods. Experience judgment has certain limitations. Ultrasonic detection is easily limited by the detection interface, and the requirements for the location of the measuring points are high, and the accuracy is difficult to achieve. Inspection requirements, radiographic inspection has radiation safety requirements on the site, the inspection cost is high, and it is difficult to carry out comprehensively. Therefore, the current grouting fullness inspection method has great limitations, which seriously affects the safety and reliability of the connection of prefabricated building components. sex

[0004] In order to realize the standardization, high production efficiency and fast construction requirements of bridge industrialization for prefabricated components, the present invention proposes a new type of prefabricated assembled pier column structure, which can adapt to the construction of most conventional bridges and effectively solve the problem of pier column segment Problems such as misplaced connection at the seam and inconvenient assembly and construction

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