Suspension cable bridge abutment type pre-stress anchorage

A prestressing and bridge pier technology, applied in the direction of suspension bridges, bridge forms, bridges, etc., can solve the problems of gravity anchorage construction difficulty, large excavation volume of gravity anchorage, and low effectiveness efficiency, so as to shorten the anchorage construction period, The effect of reducing project cost and reducing anchorage project cost

Inactive Publication Date: 2017-01-25
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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

Method used

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  • Suspension cable bridge abutment type pre-stress anchorage
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  • Suspension cable bridge abutment type pre-stress anchorage

Examples

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Effect test

Embodiment 1

[0032] Such as Figure 1-Figure 4-c As shown, a suspension bridge pier type prestressed anchorage, it includes steel structure concrete cap 1, steel pipe pile group 2, prestressed anchor cable group 3, main cable 4 and main cable anchorage system 5, the steel pipe The pile group 2 is composed of steel pipe vertical piles 2A and steel pipe inclined piles 2B. Intersecting vertical pile supports 2C are arranged between the steel pipe vertical piles 2A. One end of the vertical pile 2A and steel pipe inclined pile 2B extends into the bedrock, and the other end is rigidly connected to the bottom surface of the steel structure concrete cap 1, and the strands of the main cable 4 loosened are connected to the main cable anchorage system 5, and the main cable The anchor system 5 is set on the upper surface of the steel structure concrete cap 1, and the prestressed anchor cable group 3 is composed of a series of single prestressed anchor cables with a tonnage of 500t; each single prestre...

Embodiment 2

[0036] Using the structure of embodiment 1, the specific quantity and inclination angle are changed. The prestressed anchor cable group 3 is composed of a series of prestressed anchor cables with a single tonnage of 200t or 300t; The included angle of the cable direction is 0° or 10°, so as to ensure that the overall force direction of the prestressed anchor cable group is close to the direction of the main cable, so that the steel pipe piles are not stressed or only bear a small part of the pressure in the bridge state.

[0037] The steel pipe vertical pile 2A is composed of 8 or 18 steel pipes with a diameter of 2m, and the steel pipe inclined pile 2B is composed of 4 or 8 steel pipes with a diameter of 2m, and the inclination angle is 15° or 20°. When the prestressed anchor cable group 3 is composed of a series of prestressed anchor cables with a single tonnage of 200t, the design cable force of the main cable is 20,000 tons, and the number of prestressed anchor cables is 10...

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Abstract

The invention discloses a suspension cable bridge abutment type pre-stress anchorage. The suspension cable bridge abutment type pre-stress anchorage is composed of a steel-structure concrete abutment, 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 rigidly connected with the steel-structure concrete abutment; an inner anchorage end in the pre-stress anchor cable group is fixedly arranged on the base rock; an outer anchorage end is fixedly connected with the steel-structure concrete abutment; an included angle between a total stressing direction of the pre-stress anchor cable group and the direction of the main cable ranges from -10 degrees to 10 degrees; the main cable anchoring system is fixed at the top of the steel-structure concrete abutment. According to the suspension cable bridge abutment type pre-stress anchorage, a huge pull force of the main cable is transferred to the base rock through the pre-stress anchor cable group and a traditional stressing manner of an anchorage structure is changed; a force bearing range of the anchorage structure is extremely improved; a brand new manner is provided for construction of an extra-large suspension cable bridge and the engineering cost is saved.

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] Tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/14E01D11/02
CPCE01D19/14E01D11/02
Inventor 葛修润汤华王东英
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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