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Plateau area double-lane road curve slope combination section alignment index selection method

A two-lane, regional technology, applied in the fields of medical science, diagnosis, psychological devices, etc., can solve the problems such as the reduction of the linear combination value of the curved slope combination section, and achieve the effect of a simple method

Active Publication Date: 2021-08-03
SOUTHEAST UNIV
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Problems solved by technology

[0005] According to the route design code in China, the longitudinal slope of the plateau road above 3000m above sea level must be reduced according to the altitude, but there is no relevant regulation for the linear combination value of the curved slope combination section to be reduced according to the altitude

Method used

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  • Plateau area double-lane road curve slope combination section alignment index selection method
  • Plateau area double-lane road curve slope combination section alignment index selection method
  • Plateau area double-lane road curve slope combination section alignment index selection method

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Embodiment

[0085] A typical two-lane road in the plateau area—National Highway 318 Linzhi City-Sejila Mountain Pass section was selected for field driving experiments. The experimental road section is two-way two-lane, with a lane width of 3.5m and a design speed of 40km / h. The starting elevation of the selected road section is 2979m, and the ending elevation is 4720m. The experimenters selected 10 young drivers who entered the plateau area for the first time (the plateau acclimatization period ≤ 10 days) as experimental samples, including 7 males and 3 females, with an average age of 25.4 years and an average driving experience of 4.7 years. The calculation method of the alignment index of the curved slope combination road section mainly includes the following steps:

[0086] Step (1): Divide the altitude range of the plateau (3000m to 5000m) into four altitude intervals (3000m, 3500m), (3500m, 4000m), (4000m, 4500m), (4500m, 5000m), and for each altitude interval, Collect the speed, h...

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Abstract

The invention discloses a plateau area double-lane road curve slope combination section alignment index selection method. The method comprises the following specific steps that collecting vehicle speed, heart rate and electroencephalogram signal data of a driver in different curve slope combination sections in combination with an on-site driving test; performing sample entropy processing on the electroencephalogram and heart rate indexes of the driver, and extracting feature indexes of the electroencephalogram and heart rate indexes; performing principal component analysis on the heart rate sample entropy and the electroencephalogram signal sample entropy to obtain a driver psychological load comprehensive evaluation index CISE; constructing a regression model of the comprehensive evaluation index CISE and the linear combination values CA of the curve slope combination sections of the different altitude intervals; and finally, determining linear combination thresholds Cacri corresponding to different altitude intervals by utilizing the Lagrange median theorem, and taking the linear combination thresholds Cacri as linear design indexes of the curve slope combination road section. According to the method, the linear design index selection problem of the curve slope combined road section under the plateau low-pressure oxygen-deficient environment is solved, and theoretical support is provided for linear safety design of the plateau road.

Description

technical field [0001] The invention relates to a method for selecting a line shape index of a curved slope combination section of a two-lane highway in a plateau area, and belongs to the technical field of road geometric line shape design. Background technique [0002] The plateau area has complex topography, harsh weather conditions, frequent and serious traffic accidents, and severe road safety situation. The physiological and psychological conditions of the driver in the plateau low-pressure hypoxic environment are quite different from those in the plain area, resulting in a higher psychophysiological load of the driver than in the plain area, which affects driving safety. Therefore, the linear combination design of the curved slope combination section of the plateau highway has It is necessary to consider the impact of low pressure and low oxygen environment on the driver. [0003] At present, the roads in the plateau area are mainly low-grade two-lane roads. Due to th...

Claims

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Application Information

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IPC IPC(8): A61B5/16A61B5/318A61B5/024
CPCA61B5/165A61B5/024A61B5/72A61B2503/22
Inventor 陈飞左天骄张丹妮胡飞薄雾张平朱佳韵
Owner SOUTHEAST UNIV
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