Method for calculating three-dimensional stopping sight distance of urban underground road

A technology for underground roads and parking sight distance, which is applied in calculation, instrumentation, design optimization/simulation, etc., and can solve problems such as poor practicability and complex analytical methods

Active Publication Date: 2018-12-07
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Abstract
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Problems solved by technology

At present, the calculation of the three-dimensional sight distance of the road mainly includes two methods: the graphical method and the analytical method, and the analytical method is complicated and not very practical

Method used

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  • Method for calculating three-dimensional stopping sight distance of urban underground road
  • Method for calculating three-dimensional stopping sight distance of urban underground road

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Embodiment

[0030] Example: such as figure 1 , figure 2 As shown, the present embodiment relates to a method for checking and calculating the sight distance of three-dimensional parking on underground roads. Obstacles encroaching on the line-of-sight envelope.

[0031] (1) Draw a three-dimensional map of the tunnel in proportion, such as figure 1 shown.

[0032] For the sake of clarity, the driving trajectory is taken out separately. Draw the object height line S2 and the object height line S3 parallel to the driving trajectory line S1 according to the driver's eye height h1 and object height h2, as in figure 2 shown.

[0033] (2) On the mesh height line S3, take several equal points A1, A2, A3, A4 at intervals L.

[0034] (3) Starting from A1, A2, A3, A4... (driver's point of view) respectively, determine the end points B1, B2, B3, B4...

[0035] (4) Connect the starting and ending points respectively to obtain the line of sight A1B1, A2B2, A3B3, A4B4....

[0036] (5) Draw the ...

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Abstract

The invention in particular relates to a method for calculating the three-dimensional stopping sight distance of an urban underground road. The method is characterized by comprising the steps of determining a viewpoint and an object position, drawing a sight line and a section envelope line, generating a final sight distance envelope surface and judging whether a sight distance requirement is satisfied or not. The method in the invention has the advantages that: from the three-dimensional linear combination space angle of a road, it closes to the actual situation; whether the road satisfies the stopping sight distance requirement or not can be rapidly verified through a convenient method; therefore, the method has the important effect for verification and optimal design; and thus, the method is simple and feasible, and suitable for practical application.

Description

technical field [0001] The invention relates to road engineering technology, in particular to a method for checking and calculating the three-dimensional parking sight distance of urban underground roads, which is used in the design stage of urban underground roads to conveniently check whether the road parking sight distance meets the specification requirements from a three-dimensional perspective and the method thereof. The system plays an important role in improving road safety in the future. Background technique [0002] The construction space of urban underground roads is closed, the environment is monotonous, the noise is loud, and the visual conditions are poor. After a traffic accident, it is easy to cause secondary accidents such as fire, and it is difficult to escape and rescue. Therefore, the traffic safety guarantee of underground roads is particularly important. The analysis of traffic accident data on underground roads in operation shows that rear-end collisio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T15/00
CPCG06T15/005G06F30/20
Inventor 游克思叶剑亮黄瑞达
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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