Structure and construction method of a steel-concrete composite structure aqueduct

Abstract

The invention relates to a structure and a construction method of a steel-concrete combined structure aqueduct, belonging to the technical field of building structures. The steel-concrete composite structure aqueduct comprises an upper concrete tank body, a steel tie rod at the top of the tank body and a lower steel beam. The upper concrete tank body adopts a rectangular or U-shaped section, and the lower steel beams are arranged along the longitudinal length of the tank body, and are connected with the upper concrete tank body through connecting pieces to form a whole. The side wall of the tank body is strengthened by variable cross-section, L-shaped thin steel plate pasted on the inside or prestressed steel bars arranged vertically. The top of the side wall of the tank body is connected by steel tie rods. The structure of the steel-concrete combined structure aqueduct of the present invention changes the stress state and structural details of the traditional concrete aqueduct, so that the aqueduct does not need to rely on a large number of prestressed tendons to control concrete cracking, greatly improves the water delivery safety of the aqueduct, and has a simple structure , Convenient construction, economical and practical.

Description

technical field [0001] The invention relates to a structure and a construction method of a steel-concrete combined structure aqueduct, belonging to the technical field of structural engineering. Background technique [0002] As an important water delivery structure, aqueducts are widely used in water conservancy projects and water diversion projects. Due to the special function of use, the structure of the aqueduct must not only meet the requirements for carrying capacity, but also meet the requirements for watertightness to ensure the safety of the water delivery process. Traditional aqueducts usually adopt a prestressed reinforced concrete structure, and the internal tensile stress of the structure is reduced by applying prestress in three directions (horizontal and longitudinal directions of the bottom plate, and vertical direction of the side walls) to avoid concrete cracking under tension. Due to the three-way interlacing of prestressed tendons and the large number, th...

AI Technical Summary

Problems solved by technology

The composite structure aqueduct described in the present invention can meet the anti-cracking design requirements without setting prestressed tendons or only a small amount of prestressed tendons by changing the stress state and structural details of the structure. In the normal use stage, no tensile stress is generated or the tensile stress is much smaller than the cracking stress of concrete, which fundamentally eliminates the possibility of concrete cracking, greatly improves the safety and reliability of the aqueduct structure, and solves the problem of relying on a large number of prefabricated aqueducts in existing concrete aqueducts. The difficulty of construction and limited effect caused by stress tendons to control concrete cracking

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