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Method for determining stopping sight distance in small-radius spiral tunnel on expressway and method for widening tunnel section

A parking sight distance and highway technology, which is applied in tunnels, earth-moving drilling, mining equipment, etc., can solve problems such as the limitation of driving sight distance, the influence of driving sight distance without considering the maintenance lane, and potential safety hazards.

Active Publication Date: 2012-02-08
HUNAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the wall effect of the drivers and passengers in the tunnel, the sight distance is relatively limited compared to the driving outside the tunnel
The traditional parking sight distance in a small-radius tunnel only considers the wall effect of the tunnel side wall on the parking sight distance, and does not consider the influence of the road cross slope and the maintenance roads on both sides of the tunnel on the driving sight distance
This poses a safety hazard to the passengers

Method used

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  • Method for determining stopping sight distance in small-radius spiral tunnel on expressway and method for widening tunnel section
  • Method for determining stopping sight distance in small-radius spiral tunnel on expressway and method for widening tunnel section
  • Method for determining stopping sight distance in small-radius spiral tunnel on expressway and method for widening tunnel section

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Experimental program
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Embodiment

[0036] The design speed of a spiral tunnel on an expressway is 100km / h. The tunnel is located on a curve with a longitudinal slope of 3% (downhill section), a left curve, and the radius of the horizontal curve of the inner side wall of the tunnel curve R=1200m. The superelevation value of the road surface is 4 %, tunnel building limits and inner contours such as Figure 4 , where the remaining width is 0.25m; the left lateral width is 0.5m; the right lateral width is 1.0m; the left maintenance road width is 0.75m; the right maintenance road width is 1.0m; the maintenance road height is 0.6m.

[0037] According to Article 3.0.12 of the highway engineering technical standard JTG B01-2003, check Table 3-1 in the standard to know that the safe parking sight distance for passenger cars is S=160m, and check Table 3-3 in the standard to know that the safe parking sight distance for trucks is S=190m.

[0038] Depend on Figure 4 It can be seen that:

[0039] R j =1200+0.75=1200...

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Abstract

The invention relates to a method for determining a stopping sight distance in a plane-curve small-radius spiral tunnel and a method for widening a tunnel section on the premise of meeting a safe stopping sight distance, in particular to a method for determining a stopping sight distance in a plane-curve small-radius spiral tunnel in a mountainous area and widening the tunnel section. By correcting the conventional method for determining the stopping sight distance in a tunnel, the traveling safety is enhanced. Meanwhile, a method for widening the tunnel section according to the stopping sight distance determined with the method is provided, so that a satisfactory stopping sight distance is obtained.

Description

technical field [0001] The invention relates to a tunnel section widening method for determining the parking sight distance in a flat curve small radius tunnel and satisfying the safe parking sight distance, especially a method for determining the parking sight distance in a mountainous flat curve small radius spiral tunnel and widening the tunnel section method. Background technique [0002] When the route of the mountainous expressway is limited, and it is necessary to concentrate on raising or lowering a certain height in one or more places to make full use of the favorable terrain, the route can use one or more spiral tunnels in the same direction (clockwise or counterclockwise) Continuously hover to extend the distance and overcome the height difference. At this time, it is often unavoidable to set a small-radius flat curve in the tunnel. Considering the wall effect of the drivers and passengers in the tunnel, the sight distance is relatively limited relative to the d...

Claims

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Application Information

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IPC IPC(8): E21D9/14
Inventor 彭立蒋武军傅立新任会蒋正华
Owner HUNAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
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