Attached opening-closing protective cover of urban bridge

Abstract

An attached opening-closing protective cover of an urban bridge is arranged on the pier of the urban bridge and an a bent cap at the top end of the pier, wherein two portal frames composed of portal uprights and a longitudinal tie beam are symmetrical about the medial axis of the urban bridge; a roller shaft is arranged at the top end of each portal frame for supporting and fixing a hauling cable; a longitudinal purline is connected to a semi-cambered vertical purline to form a lattice; a cambered PC corrugated board is fixed to the knots of the lattice as a roof, thereby forming a semi-cambered roof structure; one end of the roof structure is fixed to the longitudinal tie beam through a hoop arranged at the bottom of the vertical purline and rotates together with the longitudinal tie beam; the other end of the roof structure is connected to the hauling cable; and the hauling cable is connected to a hauling equipment system and controlled by the hauling equipment system to stretch and shrink so that the roof structure is opened and closed with the longitudinal tie beam as the axis; therefore, a plurality of functions such as rain and snow resisting, glare preventing, automatic snow removing, ventilating and the like, and active protection for the urban bridge is realized.

Description

technical field [0001] The invention belongs to the technical field of bridges, and in particular relates to an attached opening and closing protective cover for urban bridges. Background technique [0002] At present, the rapid development of urban expressway system, urban elevated road system, urban rail transit and urban interchanges is increasingly dependent on closed and uninterrupted three-dimensional traffic systems, making municipal bridges both in scale and quantity. unprecedented development. [0003] For such urban bridges, rainy and snowy weather will have a greater impact on driving safety and traffic order, mainly including the following factors: [0004] (1) When it snows, snowflakes block the driver's sight; when it rains heavily, the rain will also block the driver's sight; [0005] (2) Larger longitudinal slopes are set at the entrance and exit of urban overpasses or viaducts. Due to snow or rain, the adhesion between the vehicle tires and the bridge surf...

AI Technical Summary

Problems solved by technology

[0004] (1) When it snows, snowflakes block the driver's sight; when it rains heavily, the rain will also block the driver's sight;

[0005] (2) Larger longitudinal slopes are set at the entrance and exit of urban overpasses or viaducts. Due to snow or rain, the adhesion between the vehicle tires and the bridge surface decreases, making it difficult to ensure vehicle handling stability when climbing or braking. , easy to induce traffic accidents;

[0006] (3) After rainy and snowy weather, especially for northern cities in winter, the bridge deck is prone to freezing, which will lead to a sharp decrease in the adhesion coefficient, and vehicles will slide sideways, causing traffic accidents and traffic jams;

Although this technology partially solves the problem of driving safety on bridge decks under rain and snow conditions, in the daily operation of urban bridges, a large number of vehicle exhaust and toxic and harmful gases cannot be dissipated, which leads to bridge ventilation, air quality and environmental pollution problems. , and also caused a certain degree of harm to pedestrians

In addition, clearing the covered snow in time after the rain and snow not only requires high-altitude operations but also cannot realize mechanical cleaning, which also poses a greater threat to the personal safety of sanitation personnel and greatly increases the workload and difficulty of work

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