Suspension cable bridge pier abutment type pre-stress anchorage

Abstract

The invention discloses a suspension cable bridge pier abutment type pre-stress anchorage. The suspension cable bridge pier abutment type pre-stress anchorage is composed of a steel-structure concrete bearing platform, a steel pipe pile group, a pre-stress anchor cable group, a main cable and a main cable anchoring system, and is characterized in that the steel pipe pile group is composed of a vertical pile and an inclined pile; one end of the vertical pile and one end of the inclined pile stretch into a base rock and the other ends of the vertical pile and the inclined pile are in rigid connection with the steel-structure concrete bearing platform; an inner anchor head end of the pre-stress anchor cable group is fixed on the base rock and an outer anchor head end of the pre-stress anchor cable group is fixedly connected with the steel-structure concrete bearing platform; an included angle between the direction of the pre-stress anchor cable group and the direction of the main cable is 0-5 degrees; an inclined angle of the pre-stress anchor cable group is greater than that of the main cable; and the main cable anchoring system is fixed at the top of the steel-structure concrete bearing platform. A huge pull force of the main cable is transmitted to the base rock through the pre-stress anchor cable group and a traditional stressing manner of an anchorage structure is changed; and a force bearing range of the anchorage structure is extremely improved and a brand new way is provided for construction of ultra-large suspension cable bridges.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and more specifically relates to a prestressed anchorage of suspension bridge piers, which is suitable for the construction of suspension bridge anchorages in large rivers, lakes, etc., and is especially suitable for the construction of super long-span suspension bridge anchorages in coastal plains or in the sea. Background technique [0002] Suspension bridge is currently the bridge form with the largest spanning capacity in the world. According to the anchoring method of the main cable, it can be divided into two types: self-anchored suspension bridge and ground-anchored suspension bridge. Ground-anchored suspension bridges are mainly composed of anchors, cable towers, cable systems, stiffening beams, etc. The anchors are an important component that transmits the cable force to the foundation, and are generally divided into two types: gravity anchors and tunnel anchors. [0003] Tunn...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a suspension bridge pier type prestressed anchorage, which is simple in structure and easy to use, and solves the problem of large excavation volume of gravity anchors, large interference to the environment, difficulty in construction of gravity anchorages in water, and effective efficiency. low problem

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