Safe sight distance improvement system for small-radium tunnel bend

Abstract

The invention relates to the technical field of tunnel traffic safety, in particular to a safe sight distance improvement system for a small-radium tunnel bend. The system comprises a widened-inner-side tunnel bend side wall of the small-radium tunnel bend, a widened-inner-side maintaining roadway of the small-radium tunnel bend, and a visual information induction safety facility, wherein the visual information induction safety facility comprises a lane indicating arrow arranged above a tunnel current lane, warning posts which are arranged between the spaced positions of the outer edges of themaintaining roadways before and after widening is carried out are arranged near the maintaining roadways on the outer side of the bend, light reflection spikes, yellow and black vertical face labelsarranged on the side edge of the maintaining roadway, and reflective stripes arranged on the side wall of the tunnel; and the light reflection spikes are arranged on the center line of the road, are arranged between the spaced positions of the outer edges of the maintaining roadways before and after widening is carried out, and are arranged on the outer side of the bend. According to the environment characteristics of small-radium tunnel bend road segments, the inner side of the bend is subjected to widening processing, the problem of an insufficient driver sight distance is solved, meanwhile,a space change after the bend is widened is considered to construct one set of integral and continuous visual information induction facility combination so as to guarantee tunnel traffic safety.

Description

technical field [0001] The invention relates to the technical field of tunnel traffic safety, in particular to a safety sight-distance raising system for small-radius tunnel curves. Background technique [0002] With the continuous development of my country's economy, the continuous improvement of comprehensive national strength and the continuous application of high-tech, my country's tunnel and underground projects have achieved unprecedented rapid development. According to the Statistical Bulletin on the Development of the Transportation Industry in 2017, there were 16,229 highway tunnels across the country with a total length of 15,285,100 meters, an increase of 1,048 tunnels with a length of 1,245,400 meters. While overcoming terrain constraints and improving alignment, tunnels are also restricted by terrain and other factors. There are tunnels with small-radius curves in plane alignment. Relevant survey results by domestic scholars show that the accident rate of tunne...

AI Technical Summary

Problems solved by technology

Compared with the rich roadside environment of ordinary highways, tunnels have the characteristics of narrow space and single driving environment, which makes the driver's video vision insufficient in the small-radius tunnel curved road section, making it difficult to find that the tunnel is facing the future early, and it is easy to cause frontal accidents. Collision or scraping, it is difficult to guarantee the sight distance of passing cars and parking sight distance

The lighting conditions of most road tunnels are poor, and the dark driving environment lacks sight guidance, and it is difficult for drivers to clearly understand the road alignment at small-radius tunnel bends

In the existing technology, the research on tunnel safety is mainly concentrated on the entrance and exit of the tunnel, while the research on the small-radius curve is less. The existing related technology mainly focuses on enhancing the illumination, but this does not improve the driver's sight distance Therefore, there is an urgent need for a safe and effective small-radius tunnel curve widening and complete optimization method

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