Transverse anti-overturning catastrophe reinforcing design method for single-column pier bridge

Abstract

The invention discloses a transverse anti-overturning catastrophe reinforcing design method for a single-column pier bridge. The method comprises the following steps that an anti-overturning system is arranged between a single-column pier and a middle cross beam; the anti-overturning system comprises an externally-attached steel plate, an upper anchor box, an inhaul cable system, a lower anchor box and an annular steel plate, the externally-attached steel plate is fixedly connected with the middle cross beam, and the upper anchor box is fixedly arranged on the externally-attached steel plate; the annular steel plate is fixedly connected with the single-column pier, the lower anchor box is fixedly installed on the annular steel plate, the upper end of the inhaul cable system is connected with the upper anchor box, the lower end of the inhaul cable system is connected with the lower anchor box, and the inhaul cable system is in a tensioned state. The system is low in cost and easy to install, rapid reinforcement can be achieved without interrupting the traffic interface, the framework is flexible to disassemble, and components are easy to replace and maintain. A plurality of inhaul cables are arranged according to the anti-overturning bearing capacity requirement, the anti-overturning price of a linear bridge and a curved bridge is achieved by changing the number of the upper anchor boxes and the number of the lower anchor boxes, the anti-overturning bearing capacity of the bridge is greatly improved, and the application range of the bridge is greatly widened.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a transverse overturning catastrophe-resistant reinforcement design method for single-pillar pier bridges. Background technique [0002] At present, the contradiction between the growth of transportation demand and the tension of construction land is prominent. The single-pillar pier beam bridge has the advantages of reducing land occupation, strong adaptability to complex sites, and economical beauty. It is widely used in the construction of highways and urban bridges at home and abroad. Therefore, the rational construction of single-pillar bridges has important social and economic significance for promoting the intensive use of land resources and realizing the goal of three-dimensional traffic construction. In recent years, there have been frequent reports of single-pillar pier-beam bridge overturning accidents caused by heavy vehicles crossing the bridge, resulting in huge lo...

AI Technical Summary

Problems solved by technology

Some bridges with single-pillar piers built before 2018 cannot meet the requirements of the new code and need to be reinforced. How to improve the anti-overturning bearing capacity of existing bridges with single-pillar piers in service is an important technical issue in bridge reinforcement

When there is a cover beam under the main girder, the anti-overturning ability of the bridge can be improved by setting drawn steel bars. However, for single-column pier bridges without cover beams, the cross-sectional size of the pier is still limited, and it is impossible to set drawn steel bars.

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