The Tengzhou Jinghe Concrete-Filled Steel Tube Bridge Tower Construction Process Analysis And Research

In recent years, concrete filled steel tube has been applied to the construction of cable tower. Combining with the advantages of steel tower and concrete tower, steel tube concrete tower section is less than reinforced concrete tower. It contains subsection processing, segmentation installation welding, and pouring concrete construction technology. Concrete filled steel tube gives full play to the advantages of two materials. The constraints effect of the steel tube concrete improves the bearing capacity of the core concrete. The core of the concrete in steel tube won’t produce local buckling.The construction control technology of steel tube concrete cable tower is different from reinforced concrete and steel cable tower. The construction control difficulty is in aspect of quality and safety. For control of the cable tower installation accuracy, this paper is according to the construction process from "board-processing parts, steel tower segment assembly (factory inscribed long)-the connection made in detail.The forms of figure and table are introduced. In the process of construction of the key control points, this paper innovatively explains the asymmetric K shape control weld steel pylon welding deformation and precision of steel tube end. In body frame on assembly, segmentation welding, improves the accuracy of the new method assembled and the future of concrete filled steel cable tower construction to provide the reference for the success of the opinion.For the construction of the towers, security is not ignored the important factors in the choice of installation plan.The first thinking is safety factor. The bridge is according to the site conditions, the choice of crawler crane scheme. But the crawler crane will be the most big period of weight110tons of the cable tower crane to stage from the ground at an altitude of100meters assembly welding. Facing a safety risk can be imagined. This article is writen from the crane type checking, a steel pylon hoisting safety calculation, wire rope calculations, the strength of the lug checking in details the theoretical calculation and introduced. The fact that selecting safe insurance coefficient, reliable, and the calculation formula of the tally with the actual situation. The hoisting was stable and reliable. The formula of calculating and process for similar project construction provides a good example. In the installation of the cable tower construction, considering the construction assembly precision and construction safety, few bands of the scheme. The bridge is safe and accurate installation controlled by crane. For the installation of the cable tower, it provides successful experience.For steel segment spelled on the tower in pile welding and concrete work, it needs to set work platform. In the past, the platform in setting is used mostly without stents platform. In the construction of the bridge, we ensure the construction progress and meet the requirements of the workers cross homework. The setting foot hand platform. Meters around the high cable tower is built nearly meters of scaffolding operation platform. The construction project may encounter such as wind or bad weather. A detailed and actual situation of the safety check is very important. At the same time, uncertainty factors in the process of setting, checking the complex scheme, such as considered improper, appear easily safety accidents. In the cable tower housed meters high scaffold, in this paper the tally with the actual situation for the design and theory analysis, and although not consider in subsection overhung segmentation unloading, the level of scaffold pole strength, stiffness and stability checking of made stem, the security situation comply with the requirements. To ensure that no risk at all, we also use a block overhung segmentation unloading plan. This article uses the scaffold formulas of safe, reliable, and the scaffold is in using process that has withstood the test of the winds and bad weather.The meters of scaffold success provides the reliable theory calculation basis for similar project construction.