Novel main tower crown structure and sectional installation method thereof

Abstract

The invention provides a novel tower crown structure of a main tower. The novel tower crown structure comprises a tower crown body, the tower crown body is of a three-section segmented structure and is sequentially segmented into a first tower crown section, a second tower crown section and a third tower crown section in the height direction of the tower crown body, wherein the first section of tower crown and the second section of tower crown are sectioned from the starting point of the tower crown slope section, and the first section of tower crown and the second section of tower crown are welded and fixed; the second section of tower crown and the third section of tower crown start to be sectioned on the slope section, reinforcing transverse partition plates are arranged at the sectioning positions, and connecting and fixing plates are arranged at the reinforcing transverse partition plates; and the second section of tower crown is fixedly connected with the third section of tower crown through a connecting and fixing plate. The invention further provides a sectional installation method of the tower crown structure. The method has the advantages that a sectional manufacturing and mounting process is adopted, so that manufacturing of the tower crown is facilitated, welding quality is guaranteed, transportation is facilitated, transportation safety is guaranteed through loading and fixing, hoisting is facilitated, mounting safety and mounting precision are guaranteed through fixing, later stay cable construction hoisting is facilitated, and cost is saved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a novel main tower crown structure and a segmented installation method thereof. Background technique [0002] The crown of the main tower is a large cone-shaped steel structure embedded in the top section of the main tower, which is mainly composed of embedded sections and exposed sections. Among them, the crown structure of the embedded section is welded by horizontal and vertical ribs, and the embedded section is equipped with steel plate anchorage reinforcement and shear reinforcement; the exposed section is composed of four-sided tower crown panels, internal longitudinal ribs, and transverse diaphragms . The material of the steel plate is Q345qD steel plate, the weld form is T-shaped, butt weld, and the weld grade is penetration. [0003] Regarding the construction process of the main tower crown, the traditional method is: firstly manufacture, weld and paint th...

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Problems solved by technology

The following problems were found in the practical application of this method: (1) The original design tower crown structure was fabricated as a whole. Due to the heavy weight and large geometric size of the structure, it was difficult to flanging welding, moving and hoisting during the overall fabrication, and the manufacture was inconvenient; Moreover, there is not enough space for the internal operation of the top structure of the tower crown, and it is difficult to perform welding operations to meet the weld quality required by the design drawings; Wide problems, high requirements for transportation safety and transportation vehicles, and high transportation costs; (3) The overall transportation of the tower crown to the site requires the installation of large-scale lifting equipment, and the height is high. The installation accuracy and temporary positioning during installation are complicated, and the installation is not easy Safety, temporary positioning is difficult, and the cost of lifting measures is high; (4) The overall installation of the tower crown needs to be embedded in the concrete at the top of the tower column. After the overall installation of the tower crown is completed, the follow-up cable-stayed anchorage equipment cannot hoisting into the tower, the follow-up cable-stayed construction operation is more difficult, and the construction is inconvenient

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