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Design method for adding ramps to partial interchange intersection

A technology of interchange and design methods, applied in calculation, special data processing applications, instruments, etc., can solve problems such as demolition and relocation disturbing residents, finding no solution for adding ramps, time-consuming and labor-intensive problems, and achieve the effect of improving efficiency and shortening construction time

Active Publication Date: 2017-05-31
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the fact that some of the interchanges that have been built are mostly 3 floors or higher, there are many structures such as bridges, piers, and roadbeds, and the horizontal and vertical relationships are intricate. It is often difficult to start adding ramps, requiring repeated deliberations on many plans, which is time-consuming and labor-intensive.
And the result is either that no plan to add ramps can be found, some steering functions have been missing, and the driver has a long detour, making travel inconvenient; or the selected plan has a large amount of work, and even causes problems such as demolition and demolition.

Method used

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  • Design method for adding ramps to partial interchange intersection
  • Design method for adding ramps to partial interchange intersection
  • Design method for adding ramps to partial interchange intersection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figure 1 to Figure 4 As shown, take the 3-way interchange where the roads in 3 directions intersect to add ramps ①-③ as an example.

[0047] 1) Number the starting road direction. The roads in three directions intersect, k=3, then the starting points of the roads are numbered as ①, ②, ③ in the counterclockwise direction, such as figure 1 shown.

[0048] 2) Calculate the number of all-interchange ramps where roads in three directions intersect. n=3×(3-1)=6. The number of all-interchange ramps where roads in three directions intersect is 6.

[0049] 3) Number the turning ramps. Number the turning ramps of some existing interchanges, such as image 3 shown. There are 5 ramps in some existing interchanges, n 0 = 5, such as figure 2 shown.

[0050] 4) Calculate the number of ramps that need to be added to rebuild a partial interchange where roads in three directions intersect into a full interchange. Δn=n-n 0 =6-5=1.

[0051] This part of the interchang...

Embodiment 2

[0063] Take the addition of ①-④ ramps at the 4-way interchange where roads in 4 directions intersect as an example.

[0064] 1) Number the starting road direction. The roads in 4 directions intersect, k=4, then the starting points of the roads are numbered as ①, ②, ③, ④ in the counterclockwise direction, such as Figure 5 shown.

[0065] 2) Calculate the number of all-interchange ramps where roads in four directions intersect. n=4×(4-1)=12. The number of all-interchange ramps where roads in four directions intersect is 12.

[0066] 3) Number the turning ramps. Number the turning ramps of some existing interchanges, such as Figure 6 shown. There are 11 ramps in some existing interchanges.

[0067] 4) Calculate the number of ramps that need to be added to transform the partial interchanges where the roads in four directions intersect into full interchanges. Δn=n-n 0 =12-11=1.

[0068] This part of the interchange lacks one ramp: ①-④ ramp.

[0069] 5) Calculate the max...

Embodiment 3

[0080] Take the addition of ①-⑤ ramps at the 5-way interchange where roads in 5 directions intersect as an example.

[0081] 1) Number the starting road direction. The roads in 5 directions intersect, k=5, then the starting points of the roads are numbered as ①, ②, ③, ④, ⑤ in the counterclockwise direction, such as Figure 10 shown.

[0082] 2) Calculate the number of all-interchange ramps where roads in four directions intersect. n=5×(5-1)=20. The number of all-interchange ramps where roads in five directions intersect is 20.

[0083] 3) Number the turning ramps. Number the turning ramps of some existing interchanges, such as Figure 11 shown. There are 19 ramps in some existing interchanges, n 0 =19.

[0084] 4) Calculate the number of ramps that need to be added to transform the partial interchanges where the roads in four directions intersect into full interchanges. Δn=n-n 0 =20-19=1.

[0085] This part of the interchange lacks 1 ramp: ①-⑤ ramp.

[0086] 5) Calc...

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Abstract

The invention provides a design method for adding ramps to a partial interchange intersection. Roads connected to the intersection are all two-way roads. The method comprises the following steps: firstly, access roads entering the intersection are numbered, and the number k of the roads entering the intersection is calculated; the number n of interchange ramps of the intersection under a full interchange condition is calculated according to the formula n=k*(k-1); the existing number n0 of the interchange ramps at the intersection is calculated, and the number delta n of ramps required to be added if the intersection is transformed into a full interchange intersection is calculated according to the formula delta n=n-n0; the ramp number of each access road is calculated, and when the ramp number is smaller than k-1, the number j of partial interchange access roads and the number ytj of connected exit ramps are recorded; exit road number j of partial interchange exit roads and the number xis of connected entrance ramps are recorded; finally, the maximum combination number nij of the ramps required to be added is calculated according to the formula nij=xisytj. The method simplifies the process for designing and adding the ramps to the existing partial interchange intersection, shortens building time and improves efficiency.

Description

technical field [0001] The invention relates to the technical field of interchange ramps at road intersections, in particular to a design method for adding ramps to partial interchanges. Background technique [0002] Interchange, also known as three-dimensional intersection, is a high-grade highway or urban road. It is a three-dimensional structure with plane separation set up at the node of road intersection to meet the diversion of traffic flow with large flow. Interchanges can be divided into full interchanges and partial interchanges. During the construction of many interchanges, due to the small flow of partial turns, or the constraints of cost, land use, demolition and other factors, they are often built as partial interchanges. With the development of the region and the increase of traffic flow, the partial turning demand of the nodes becomes very strong, which requires the addition of one or several turning ramps with missing original functions on the basis of the e...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 彭庆艳王晓君刘晓倩周定
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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