Overpass layout method and system for automatically changing existing roads along railway lines

A technology of roads and railways, applied in the field of overpasses and roads, can solve problems such as difficult terrain constraints and difficult to apply to actual situations, and achieve the effects of simplifying optimization problems, weakening coupling interactions, and strong practicability

Active Publication Date: 2022-05-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second stage: Propose an accurate solution, but the terrain changes and complex constraints are difficult to express with explicit functions, and there are theoretical deficiencies
The third stage: with the continuous innovation of optimization methods and the growth of computer computing power, a heuristic algorithm that does not depend on explicit functions is proposed. Among them, genetic algorithms are widely used in interchanges, but they are still limited to manual given An initial route plan, in the case of determining the start and end points of the route, optimize the route in the research area, and find a route plan that meets the constraints, which has certain limitations and is difficult to apply to the actual situation

Method used

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  • Overpass layout method and system for automatically changing existing roads along railway lines
  • Overpass layout method and system for automatically changing existing roads along railway lines
  • Overpass layout method and system for automatically changing existing roads along railway lines

Examples

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Embodiment 1

[0089] like Figure 10 As shown in the figure, the present invention provides a method for laying an overpass for automatically relocating an existing road along a railway line, comprising the following steps:

[0090] S 1 : Establish an optimization model of road and railway overpass lines.

[0091] Among them, a comprehensive geographic information model of the study area is established, and the plane intersection information of the road (including the intersection coordinates, radius, and length of the front and rear transition curves), the position of the vertical section slope change point (including mileage, elevation and vertical curve radius), bridges and tunnels are introduced. The location (including mileage and elevation) and the intersection of the rebuilt road and the new railway, and the two connection points with the existing road are used as decision variables. Taking finding the lowest comprehensive cost as the optimization function (objective function), and...

Embodiment 2

[0197] On the basis of Embodiment 1, Embodiment 2 of the present invention provides a system of a method for laying interchanges based on automatic relocation of existing roads along a railway line, including:

[0198] The optimization model building module is used to construct the optimization model of the road and railway overpass, the optimization module includes: decision variables, constraints and optimization functions in the research area;

[0199] The meshing module is used to mesh the study area with cells;

[0200] The search section division module is used to determine the starting and ending cell sets S, E and the cell sets L and R on the left and right sides of the railway in the study area for the connection between the local reconstruction road and the existing road in the study area according to the existing roads and railways, and then search the path. Decomposed into two non-intersecting segment searches and cross segment searches;

[0201] Among them, the p...

Embodiment 3

[0210] On the basis of Embodiment 1, an embodiment of the present invention provides a terminal, which includes a processor and a memory, the memory stores a computer program, and the processor invokes the computer program to execute:

[0211] S 1 : Establish an optimization model of road and railway overpass lines. S 2 : Divide the study area into cell grids, and then determine the start and end cell sets S and E of the connection between the locally reconstructed roads and the existing roads in the study area and the cell sets L and R on the left and right sides of the railway according to the existing roads and railways. Then the path search is decomposed into two non-intersecting segment searches and intersecting segment searches. S 3 : Use the DT algorithm to search for two non-intersecting segments. S 4 : Iterative search to obtain the local line of the intersection. S 5 : Integrate the generated two non-intersecting sections and intersecting sections to form seve...

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PUM

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Abstract

The invention discloses an overpass layout method, system, terminal and readable storage medium for automatically changing and moving existing roads along a railway line. The method includes: step S1: constructing an optimization model of road and railway overpass lines; step S2: Carry out cell grid division in the research area, and decompose the path search into two non-intersecting segment searches and intersecting segment searches; Step S3: perform path search on two non-intersecting segments and intersecting segments based on the optimization model; Step S4: use step The N paths, M paths and P intersecting partial lines in S3 are spliced ​​and integrated to form several complete lines, and the optimal line is determined with the optimization function as the objective function, and the curves of the plane and longitudinal sections are carried out based on the optimal line Fitting to get the final route scheme. The invention decomposes into path search of non-intersection section and intersection section, weakens the coupling interaction between connection point and intersection point, and realizes the optimization of highway and railway overpass.

Description

technical field [0001] The invention belongs to the technical field of railway design, and in particular relates to a method, system, terminal and readable storage medium for laying interchanges for automatically changing existing roads along a railway line. Background technique [0002] Railway is an important national infrastructure and the main artery of the national economy. It plays an important role in my country's economic and social development. In order to meet the needs of road transportation, the number of roads built and under construction has increased year by year, and the existing road network has become more dense. In the process of railway construction, a large number of existing roads and existing or new railway lines crossed in many cities and regions, and were restricted by the intersection angle, effective clearance and alignment of the intersections. With limited transportation safety and traffic capacity, illegal roads will inevitably be rebuilt. With...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/18G06F30/23
CPCG06F30/13G06F30/23G06F30/18
Inventor 蒲浩谢淑敏梁柱李伟宋陶然赵璐
Owner CENT SOUTH UNIV
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