A cable-tower intersection structure and construction method

Abstract

The invention relates to the field of bridge design and construction technology, specifically a novel cable bent tower intersection section structure and a construction method thereof. The novel cable bent tower intersection section structure comprises a cross beam which is arranged between two tower columns, wherein the cross beam comprises a steel box arranged between the two tower columns; the steel box is at least one box body structure, which is open at the upper end and formed by assembling and connecting a plurality of box body units; two ends, in a transverse bridge direction, of the steel box are fixed between the two tower columns through anchoring structures arranged on the side walls of the tower columns; the lower end surface of the steel box is a circular arc arch rib structure; arch supports on the two sides in the transverse bridge direction are fixed on the side walls of the tower columns; and reinforced concrete is poured into the internal side chamber body of the steel box. The invention is advantaged in that the construction process of the cross beam is simple, convenient and fast, the construction difficulty of the cable bent tower intersection section can be greatly reduced, the cross beam construction efficiency is increased through adoption of the steel box structure, the structural strength of the cross beam is enhanced and extremely great promotion value is obtained.

Description

technical field [0001] The invention relates to the technical field of bridge design and construction, in particular to a cable tower intersection structure and a construction method. Background technique [0002] Bridge towers are mainly used in long-span cable-stayed bridges and suspension bridges. They are generally high-rise structures with various structural forms, such as "inverted Y", "A", "H", "diamond", and "vase". Among them, "inverted Y type", "A type", "diamond type" and "vase type" all have a structure in which the middle tower column gradually meets and receives the upper tower column. This structure is often defined as "cable tower intersection". part". Cable towers are divided into two types, reinforced concrete cable towers and steel structure cable towers. Therefore, the intersection section is also divided into two types: concrete structure and steel structure. For traditional reinforced concrete towers, the intersection section generally adopts reinforc...

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Problems solved by technology

Since reinforced concrete cable towers are usually prefabricated and cast-in-place, the weight of the prefabricated parts is relatively high, and the requirements for the selection of lifting equipment are relatively high, so there is basically no application; as the main application direction of concrete cable towers, cast-in-place concrete has the following disadvantages due to its characteristics : (1) The pumping height of the concrete at the intersection is high, and the amount of single concrete pouring is large, which requires high performance of the concrete pumping equipment; (2) The shape and structure of the intersection is complex, and many formwork systems at the intersection use combination The formwork is assembled, the construction quality and appearance are poor, and the fixed steel formwork structure with a certain rigidity is installed, which is difficult and expensive to install; (3) The reservation of the construction opening and the pre-embedding of the steel bars are complicated and difficult to operate; (4) The intersection section is generally located at a super high altitude, and measures such as erecting a floor-standing bracket with high rigidity or a high-altitude corbel-shaped arch bracket are required. At the same time, it is difficult to remove the bracket, which has high operational risks, long construction period consumption, and large material consumption. Features

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