Railway station drainage facility network system deployment method, storage medium and equipment

Abstract

The present invention relates to the technical field of railway yard drainage systems, and specifically to a method, storage medium and device for laying out a railway yard drainage facility network system. The method includes obtaining initial data for laying out a railway yard drainage facility network system; extracting decision variables based on the initial data; determining a project cost objective function based on the decision variables; determining a drainage efficiency objective function based on the decision variables combined with a hydrodynamic model; determining constraints based on specifications; constructing a drainage facility network system optimization model based on decision variables, objective functions and constraints; initializing the drainage facility network system optimization model to generate an initial population; performing differential evolution operations on the initial population using a multi-objective differential evolution algorithm to quickly generate a set of alternative solutions; and iteratively optimizing the solutions in the set of alternative solutions using a multi-objective particle swarm optimization algorithm to output a global optimal solution. The present invention can quickly and intelligently coordinate the laying out of an excellent railway yard drainage facility network system.

Description

Technical Field

[0001] The present invention relates to the technical field of railway yard drainage systems, and in particular to a method for laying out a railway yard drainage facility network system, a storage medium and equipment. Background Art

[0002] As an important part of the railway transportation system, the design of the drainage system of the railway yard is crucial to ensure the normal operation of the railway yard and the continuity and safety of railway transportation. The network system of the yard drainage facilities is the most important component. Its layout determines the performance of the railway yard drainage system, the yard's ability to respond to extreme weather events and the drainage efficiency of daily operations, and even has a significant impact on the normal operation of the railway transportation system.

[0003] The railway station drainage system mainly includes roadbed surface drainage and external roadbed surface drainage. Roadbed surface drainage mainly includes longitudinal drainage facilities between lines, transverse drainage facilities crossing lines, highway drainage grooves, platform drainage grooves, reinforced concrete circular pipes and inspection wells, etc.; external roadbed surface drainage mainly includes drainage ditches, side ditches, gutters, intercepting ditches, waterfalls and rapids grooves, and infiltration pools, etc. The station drainage facility network system is the most important component to help roadbed drainage, mainly including longitudinal drainage grooves on the roadbed surface (including line grooves, highway drainage grooves and platform drainage grooves), transverse drainage grooves, inspection wells and drainage ditches and side ditches outside the roadbed. Water within the roadbed surface is discharged to bridges and culverts or external roadbed drainage facilities through roadbed surface drainage facilities; external roadbed drainage facilities discharge water into bridges and culverts or designated locations. The two types of drainage facilities are interrelated and should be planned in a coordinated manner to achieve the goal of optimal drainage efficiency and project cost without destroying the original ecological environment.

[0004] The layout of the drainage facility network system has many constraints, many design variables and complicated design, mainly including the plane layout, slope design and cross-section design of drainage facilities. At present, the layout work is almost entirely completed by designers based on experience, which has the problems of low design efficiency, difficulty in quickly quantifying design results and difficulty in obtaining the optimal solution. Therefore, how to quickly lay out a set of excellent railway station drainage facility network systems has become an urgent problem to be solved.

[0005] In recent years, the development of hydrodynamic models and the application of intelligent optimization algorithms in practical projects have provided new ideas for the layout of railway station drainage facilities network systems. Hydrodynamic models can simulate the dynamic behavior of water flow in drainage facilities and quickly quantify various indicators of water flow; intelligent optimization algorithms can automatically find and output the optimal solution, thereby better assisting the layout of drainage facilities. Combining hydrodynamic models with intelligent optimization algorithms will be conducive to the rapid and scientific layout of station drainage facilities network systems, improve design efficiency, enhance station risk resistance, and promote the sustainable development of railway stations.

[0006] Therefore, the present invention adopts a railway station drainage facility network system layout method, storage medium and equipment that combines a hydrodynamic model with an intelligent optimization algorithm to solve the problem that the existing railway station drainage facility network system layout work is almost entirely completed by designers relying on experience, resulting in low design efficiency, difficulty in quickly quantifying design results and difficulty in obtaining the optimal solution. Summary of the invention

[0007] The purpose of the present invention is to provide a method, storage medium and device for laying out a railway yard drainage facility network system combining a hydrodynamic model with an intelligent optimization algorithm. The specific technical solution is as follows:

[0008] In a first aspect, the present invention provides a method for laying out a railway yard drainage facility network system, comprising:

[0009] Step S1, obtaining initial data on the layout of the railway station drainage facility network system;

[0010] Step S2, extracting decision variables according to the initial data; determining the engineering cost objective function according to the decision variables; determining the drainage efficiency objective function according to the decision variables combined with the hydrodynamic model SWMM; determining the constraint conditions according to the railway yard road and drainage design specifications and the railway station and hub design specifications; constructing the drainage facility network system optimization model according to the decision variables, the engineering cost objective function, the drainage efficiency objective function and the constraint conditions;

[0011] Step S3, initializing the drainage facility network system optimization model to generate an initial population; using a multi-objective differential evolution algorithm to perform differential evolution operations on the initial population to quickly generate a set of alternative solutions; using a multi-objective particle swarm optimization algorithm to iteratively optimize the solutions in the set of alternative solutions to output a global optimal solution.

[0012] Optionally, the initial data includes paving type, cross-sectional form, structural width, ditch bottom width, minimum drainage slope, minimum starting ditch depth, maximum ditch depth and ground data information of the station design area and baseline data information of different drainage facilities.

[0013] Optionally, before extracting the decision variables, a three-dimensional coordinate system is established with the starting point of the station baseline as the coordinate origin. ;in, The axis is the horizontal axis of the plane, which is parallel to the station baseline; Axis is the plane ordinate axis, which is The axis is vertical and is set in the station plane; The axis is the elevation coordinate axis, which is set perpendicular to the station plane;

[0014] The decision variables include the decision variables of the longitudinal drainage grooves on the roadbed surface , Decision variables of transverse drainage grooves on roadbed surface and decision variables for drainage facilities outside the roadbed ; The external drainage facilities of the roadbed include drainage ditches and side ditches;

[0015] in, ; For the The coordinate vector of the control point of the longitudinal drainage ditch on the roadbed surface, Take 1, 2, ..., Any value in ; is the number of longitudinal drainage grooves on the roadbed surface;

[0016] ; , and Respectively represent the longitudinal drainage grooves on the roadbed surface The horizontal coordinate value, vertical coordinate value and elevation coordinate value of each control point. Take 1, 2, ... to Any value in ; is the number of control points of the longitudinal drainage ditch on the roadbed surface, and the arrangement order of each control point is arranged according to the arrangement order of the longitudinal drainage ditch on the roadbed surface from the starting point to the end point;

[0017] The control points on the longitudinal drainage ditch on the roadbed surface are the collective name for the center point of the ditch bottom at the slope change point on the drainage facility and the center point of the ditch bottom at the starting and ending points on the drainage facility.

[0018] ; For the The coordinate vector of the control point of the transverse drainage ditch on the roadbed surface, Take 1, 2, ... to Any value in ; is the number of transverse drainage grooves on the roadbed surface;

[0019] ; , and They respectively represent the horizontal coordinate value, vertical coordinate value and elevation coordinate value of the control point at the starting point of the transverse drainage groove; , and They respectively represent the horizontal coordinate value, vertical coordinate value and elevation coordinate value of the control point at the end point of the transverse drainage groove;

[0020] The control points on the transverse drainage ditch on the roadbed surface are the collective name for the center point of the ditch bottom at the slope change point on the drainage facility and the center point of the ditch bottom at the starting and ending points on the drainage facility.

[0021] ; For the The coordinate vector of the control point of the drainage facility outside the roadbed; Take 1, 2, ... to Any value in ; The number of drainage facilities outside the roadbed;

[0022] ; , and Respectively represent the drainage facilities outside the roadbed The horizontal coordinate value, vertical coordinate value and elevation coordinate value of each control point. Take 1, 2, ... to Any value in ; is the number of control points of the external drainage facilities of the roadbed, and the arrangement order of each control point is arranged according to the arrangement order of the external drainage facilities of the roadbed from the starting point to the end point;

[0023] The control point on the drainage facilities outside the roadbed is the general term for the center point of the ditch bottom at the slope change point on the drainage facility and the center point of the ditch bottom at the starting and ending points of the drainage facility.

[0024] Optionally, the project cost objective function is ;

[0025] in, For the The construction cost of the roadbed drainage facilities; For the The construction cost of drainage facilities outside the roadbed; Indicates the number of drainage facilities on the roadbed surface. ; Indicates the number of drainage facilities outside the roadbed, ;

[0026] The drainage efficiency objective function is: ;

[0027] in, The number of drainage outlets at the bridge culvert for drainage facilities; Indicates The average drainage flow rate of each drainage outlet.

[0028] Optionally, the constraint conditions include maintenance constraints, hydraulic constraints, inter-facility constraints and other constraints; wherein the constraint conditions that can be judged whether they are satisfied before the hydrodynamic model SWMM is calculated are called pre-constraint conditions; the constraint conditions that can be judged whether they are satisfied only after the hydrodynamic model SWMM is calculated are called post-constraint conditions;

[0029] The maintenance constraints adopt the following constraints: ;

[0030] in, Refers to the ditch depth of the drainage facilities on the roadbed surface; is the maximum trench depth limit, which is determined by the trench bottom width of the facility;

[0031] The hydraulic constraints adopt the following constraints: ;

[0032] in: ;

[0033] Indicates the longitudinal slope of the drainage facilities outside the roadbed; Indicates the longitudinal slope of the longitudinal drainage ditch on the roadbed surface; Indicates the starting depth of the longitudinal drainage ditch on the roadbed surface; Indicates the longitudinal slope of the transverse drainage ditch; Indicates the starting depth of the transverse drainage groove; Indicates the ditch depth of drainage facilities outside the roadbed; Indicates the water depth of the drainage facilities outside the roadbed; Indicates the downstream slope Greater than or equal to upstream slope ; It indicates the maximum average flow velocity of water, which is determined by the paving type and cross-sectional form of the drainage facility; Indicates the average flow velocity of water; The minimum drainage slope of the longitudinal drainage ditch on the roadbed surface, generally 2‰; The minimum drainage slope of the drainage facilities outside the roadbed, generally 2‰; The minimum drainage slope of the horizontal drainage ditch is generally 5‰; The minimum depth of the longitudinal drainage groove starting point is determined by its starting point form. The single slope is 0.3m, and the watershed point of the double slope is 0.2m; The minimum depth of the horizontal drainage ditch starting point, generally 0.5m; Refers to the elevation of the starting point of the longitudinal drainage ditch on the roadbed surface; Refers to the elevation of the roadbed surface at the starting point of the transverse drainage ditch; Indicates the starting point and bottom elevation of the longitudinal drainage ditch on the roadbed surface; Indicates the starting point and bottom elevation of the transverse drainage ditch on the roadbed surface;

[0034] The inter-facility constraints adopt the following constraints: ;

[0035] in, Indicates the bottom elevation of the end point of the transverse drainage ditch; Indicates the bottom elevation of the drainage facility outside the roadbed corresponding to the end point of the transverse drainage ditch; Indicates the bottom elevation of the end point of the longitudinal drainage ditch on the roadbed surface; Indicates the elevation of the bottom of the transverse drainage ditch at the connection; Indicates the design elevation of the water discharge surface at the bridge-culvert connection; Indicates the drainage facilities outside the roadbed The ground elevation at the control point;

[0036] The other constraints adopt the following constraints: ;

[0037] in, Indicates drainage facilities The elevation of the roadbed surface at the control point; Indicates drainage facilities The shoulder elevation corresponding to the control point; Indicates that the horizontal coordinate of the drainage facilities in the initial population individuals is The point corresponding to Coordinate values, For the current The corresponding horizontal coordinate value; Indicates the allowable lateral displacement of drainage facilities outside the roadbed.

[0038] In addition, other constraints include constraints between drainage facilities and other station equipment: the number of lines between two adjacent longitudinal drainage ditches on the roadbed surface is less than the maximum value specified in the above specifications; the longitudinal drainage ditches on the roadbed surface are arranged at the bottom of the drainage cross slope; the minimum line spacing between the longitudinal drainage ditches on the roadbed surface between the lines is 5 meters; the single slope length of the longitudinal drainage ditches on the roadbed surface does not exceed 200 to 400 meters, generally 300 meters; the transverse drainage ditches on the roadbed surface do not pass through the platform and the main line; the external drainage facilities of the roadbed are arranged in the area outside the roadbed body and inside the toe of the roadbed slope.

[0039] Optionally, the multi-objective differential evolution algorithm is a MODE algorithm; the MODE algorithm is used to randomly select three individuals from the initial population for mutation, crossover and selection operations, and the selection operation is used to determine whether the new individual replaces the current individual; wherein the selection operation is performed based on whether the new individual satisfies the post-constraint condition; if the new individual does not satisfy the post-constraint condition, the current individual is not replaced; if the new individual satisfies the post-constraint condition, the current individual is replaced by the new individual. A dominance criterion is used to compare the value of the engineering cost objective function with the value of the drainage efficiency objective function, judge the advantages and disadvantages of the new individual and the current individual, and decide whether the new individual should replace the current individual;

[0040] The MODE algorithm is used to cycle the mutation, crossover and selection operations, and when the population reaches the maximum differential evolution times of 100 to 300 times, the population differential evolution is terminated, and the current solution population is the alternative solution set;

[0041] The initial population includes all layout plans of the railway station drainage facility network system, each layout plan is an individual, and all individuals satisfy the previous constraint conditions.

[0042] Optionally, the multi-objective particle swarm optimization algorithm is a MOPSO algorithm; the MOPSO algorithm is used to iteratively optimize the solutions in the set of alternative solutions, and when the number of iterations reaches 200 to 500 times or the population converges, the iterative optimization is terminated and a global optimal solution is output, that is, the optimal layout plan of the longitudinal and transverse linear drainage facilities is output.

[0043] Optionally, the method for laying out a railway station drainage facility network system also includes laying out an inspection well in step S4; when the difference between the ditch bottom elevation at the connection point between the drainage facility and the bridge culvert and the elevation of the top of the bridge culvert is positive, an opening is required at the top of the bridge culvert to receive water flow, and an inspection well is required at the connection point between the drainage facility and the bridge culvert.

[0044] In a second aspect, the present invention provides a computer storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the method for deploying a railway yard drainage facility network system.

[0045] In a third aspect, the present invention provides an electronic device comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, which, when executed by the processor, implement the method for deploying a railway yard drainage facility network system.

[0046] The application of the technical solution of the present invention has at least the following beneficial effects:

[0047] The present invention provides a method for laying out a network system of drainage facilities for railway yards, which can quickly and intelligently coordinate the laying out of a set of excellent network systems of drainage facilities for railway yards. Specifically, the present invention extracts decision variables according to initial data, determines the engineering cost objective function according to the decision variables, determines the drainage efficiency objective function according to the decision variables combined with the hydrodynamic model SWMM, determines the constraint conditions by the specification, and then constructs the drainage facility network system optimization model, and then combines the multi-objective algorithm to quickly find the optimal solution, that is, the present invention can quickly and intelligently coordinate the laying out of a set of excellent network systems of drainage facilities for railway yards. Among them, the present invention combines the hydrodynamic model SWMM for simulation, and by controlling the density of the sub-catchment area of ​​the hydrodynamic model, the calculation result is closer to the actual drainage situation, thereby improving the scientificity and accuracy of the calculation; the present invention combines the engineering cost objective function and the drainage efficiency objective function, which is convenient for multi-objective optimization and improves the comprehensive benefits of the drainage facility network system; the present invention combines the multi-objective differential evolution algorithm and the multi-objective particle swarm optimization algorithm to output the global optimal solution, which can more scientifically lay out the network system of drainage facilities for railway yards, which can not only improve the design efficiency, but also improve the risk resistance of the station and promote the sustainable development of the railway station.

[0048] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0050] Figure 1 It is a flow chart of a method for laying out a railway yard drainage facility network system according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0051] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Example

[0052] See also Figure 1 , a method for laying out a railway yard drainage facility network system, including:

[0053] Step S1, obtaining initial data on the layout of the railway station drainage facility network system;

[0054] Step S2, extracting decision variables according to the initial data; determining the engineering cost objective function according to the decision variables; determining the drainage efficiency objective function according to the decision variables combined with the hydrodynamic model SWMM; determining the constraint conditions according to TB-10066-2000 Railway Yard Road and Drainage Design Specification and TB-10099-2017 Railway Station and Hub Design Specification; constructing a drainage facility network system optimization model according to the decision variables, the engineering cost objective function, the drainage efficiency objective function and the constraint conditions;

[0055] Step S3, initializing the drainage facility network system optimization model to generate an initial population; using a multi-objective differential evolution algorithm to perform differential evolution operations on the initial population to quickly generate a set of alternative solutions; using a multi-objective particle swarm optimization algorithm to iteratively optimize the solutions in the set of alternative solutions to output a global optimal solution.

[0056] The initial data include paving type, cross-sectional form, structural width, ditch bottom width, minimum drainage slope, minimum starting ditch depth, maximum ditch depth and ground data information of the station design area and baseline data information of different drainage facilities.

[0057] Before extracting the decision variables, a three-dimensional coordinate system is established with the starting point of the station baseline as the coordinate origin. ;in, The axis is the horizontal axis of the plane, which is parallel to the station baseline; Axis is the plane ordinate axis, which is The axis is vertical and is set in the station plane; The axis is the elevation coordinate axis, which is set perpendicular to the station plane;

[0058] The decision variables include the decision variables of the longitudinal drainage grooves on the roadbed surface , Decision variables of transverse drainage grooves on roadbed surface and decision variables for drainage facilities outside the roadbed ; The external drainage facilities of the roadbed include drainage ditches and side ditches;

[0059] in, ; For the The coordinate vector of the control point of the longitudinal drainage ditch on the roadbed surface, Take 1, 2, ..., Any value in ; is the number of longitudinal drainage grooves on the roadbed surface;

[0060] ; , and Respectively represent the longitudinal drainage grooves on the roadbed surface The horizontal coordinate value, vertical coordinate value and elevation coordinate value of each control point. Take 1, 2, ... to Any value in ; is the number of control points of the longitudinal drainage ditch on the roadbed surface, and the arrangement order of each control point is arranged according to the arrangement order of the longitudinal drainage ditch on the roadbed surface from the starting point to the end point;

[0061] The control points on the longitudinal drainage ditch on the roadbed surface are the collective name for the center point of the ditch bottom at the slope change point on the drainage facility and the center point of the ditch bottom at the starting and ending points on the drainage facility.

[0062] ; For the The coordinate vector of the control point of the transverse drainage ditch on the roadbed surface, Take 1, 2, ... to Any value in ; is the number of transverse drainage grooves on the roadbed surface;

[0063] ; , and They respectively represent the horizontal coordinate value, vertical coordinate value and elevation coordinate value of the control point at the starting point of the transverse drainage groove; , and They respectively represent the horizontal coordinate value, vertical coordinate value and elevation coordinate value of the control point at the end point of the transverse drainage groove;

[0064] The control points on the transverse drainage ditch on the roadbed surface are the collective name for the center point of the ditch bottom at the slope change point on the drainage facility and the center point of the ditch bottom at the starting and ending points on the drainage facility.

[0065] ; For the The coordinate vector of the control point of the drainage facility outside the roadbed; Take 1, 2, ... to Any value in ; The number of drainage facilities outside the roadbed;

[0066] ; , and Respectively represent the drainage facilities outside the roadbed The horizontal coordinate value, vertical coordinate value and elevation coordinate value of each control point. Take 1, 2, ... to Any value in ; is the number of control points of the external drainage facilities of the roadbed, and the arrangement order of each control point is arranged according to the arrangement order of the external drainage facilities of the roadbed from the starting point to the end point;

[0067] The control point on the drainage facilities outside the roadbed is the general term for the center point of the ditch bottom at the slope change point on the drainage facility and the center point of the ditch bottom at the starting and ending points of the drainage facility.

[0068] The engineering cost objective function is: ;

[0069] in, For the The construction cost of the roadbed drainage facilities; For the The construction cost of drainage facilities outside the roadbed; Indicates the number of drainage facilities on the roadbed surface. ; Indicates the number of drainage facilities outside the roadbed, ;

[0070] ;in, For the Roadbed drainage facilities The engineering cost per meter of the cross section at the midpoint of each slope section; For the Roadbed drainage facilities Length of slope section; The number of slope sections of the roadbed drainage facilities;

[0071] ; ;in, For the Cost of constructing surface drainage facilities outside the roadbed; For the Earthwork costs for surface drainage facilities outside the roadbed; Indicates the cost per meter corresponding to the cross section of the facility; Indicates The length of the surface drainage facilities outside the roadbed.

[0072] The drainage efficiency objective function is: ;

[0073] in, The number of drainage outlets at the bridge culvert for drainage facilities; Indicates The average drainage flow rate of each drainage outlet.

[0074] ; The total amount of water discharged from the outfall; Drainage time. The simulation results of the initial data of the railway station drainage facility network system layout were simulated using the hydrodynamic model SWMM (StormWater Management Model) to solve the and , and detect water depth and flow rate constraints, and finally derive drainage efficiency The value of .

[0075] The constraint conditions include maintenance constraints, hydraulic constraints, inter-facility constraints and other constraints; among them, the constraint conditions that can be judged whether they are satisfied before the hydrodynamic model SWMM is calculated are called pre-constraint conditions; the constraint conditions that can be judged whether they are satisfied only after the hydrodynamic model SWMM is calculated are called post-constraint conditions;

[0076] The maintenance constraints adopt the following constraints: ;

[0077] in, Refers to the ditch depth of the drainage facilities on the roadbed surface; is the maximum trench depth limit, which is determined by the trench bottom width of the facility;

[0078] The hydraulic constraints adopt the following constraints: ;

[0079] in: ;

[0080] Indicates the longitudinal slope of the drainage facilities outside the roadbed; Indicates the longitudinal slope of the longitudinal drainage ditch on the roadbed surface; Indicates the starting depth of the longitudinal drainage ditch on the roadbed surface; Indicates the longitudinal slope of the transverse drainage ditch; Indicates the starting depth of the transverse drainage groove; Indicates the ditch depth of drainage facilities outside the roadbed; Indicates the water depth of the drainage facilities outside the roadbed; Indicates the downstream slope Greater than or equal to upstream slope ; It indicates the maximum average flow velocity of water, which is determined by the paving type and cross-sectional form of the drainage facility; Indicates the average flow velocity of water; The minimum drainage slope of the longitudinal drainage ditch on the roadbed surface, generally 2‰; The minimum drainage slope of the drainage facilities outside the roadbed, generally 2‰; The minimum drainage slope of the horizontal drainage ditch is generally 5‰; The minimum depth of the longitudinal drainage groove starting point is determined by its starting point form. The single slope is 0.3m, and the watershed point of the double slope is 0.2m; The minimum depth of the horizontal drainage ditch starting point, generally 0.5m; Refers to the elevation of the starting point of the longitudinal drainage ditch on the roadbed surface; Refers to the elevation of the roadbed surface at the starting point of the transverse drainage ditch; Indicates the starting point and bottom elevation of the longitudinal drainage ditch on the roadbed surface; Indicates the starting point and bottom elevation of the transverse drainage ditch on the roadbed surface; for The next control point after for The next control point after

[0081] The inter-facility constraints adopt the following constraints: ;

[0082] in, Indicates the bottom elevation of the end point of the transverse drainage ditch; Indicates the bottom elevation of the drainage facility outside the roadbed corresponding to the end point of the transverse drainage ditch; Indicates the bottom elevation of the end point of the longitudinal drainage ditch on the roadbed surface; Indicates the elevation of the bottom of the transverse drainage ditch at the connection; Indicates the design elevation of the water discharge surface at the bridge-culvert connection; Indicates the drainage facilities outside the roadbed The ground elevation at the control point;

[0083] The other constraints adopt the following constraints: ;

[0084] in, Indicates drainage facilities The elevation of the roadbed surface at the control point; Indicates drainage facilities The shoulder elevation corresponding to the control point; Indicates that the horizontal coordinate of the drainage facilities in the initial population individuals is The point corresponding to Coordinate values, For the current The corresponding horizontal coordinate value; Indicates the allowable lateral displacement of drainage facilities outside the roadbed;

[0085] In addition, other constraints include constraints between drainage facilities and other station equipment: the number of lines between two adjacent longitudinal drainage ditches on the roadbed surface is less than the maximum value specified in the above specifications; the longitudinal drainage ditches on the roadbed surface are arranged at the bottom of the drainage cross slope; the minimum line spacing between the longitudinal drainage ditches on the roadbed surface between the lines is 5 meters; the single slope length of the longitudinal drainage ditches on the roadbed surface does not exceed 200 to 400 meters, generally 300 meters; the transverse drainage ditches on the roadbed surface do not pass through the platform and the main line; the external drainage facilities of the roadbed are arranged in the area outside the roadbed body and inside the toe of the roadbed slope.

[0086] The multi-objective differential evolution algorithm is a MODE algorithm; the MODE algorithm is used to randomly select three individuals from the initial population for mutation, crossover and selection operations, and the selection operation is used to determine whether the new individual replaces the current individual; wherein the selection operation is performed based on whether the new individual satisfies the post-constraint condition; if the new individual does not satisfy the post-constraint condition, the current individual is not replaced; if the new individual satisfies the post-constraint condition, the new individual is replaced by the new individual. The dominating criterion compares the value of the engineering cost objective function with the value of the drainage efficiency objective function, judges the advantages and disadvantages of the new individual and the current individual, and decides whether the new individual replaces the current individual; specifically, when the value of the engineering cost objective function and the value of the drainage efficiency objective function of the new individual are both better than the current individual, it is decided that the new individual replaces the current individual; otherwise, it is decided that the new individual does not replace the current individual.

[0087] The MODE algorithm is used to cycle the mutation, crossover and selection operations, and when the population reaches the maximum differential evolution times of 100 times, the population differential evolution is terminated, and the current solution population is the alternative solution set;

[0088] The initial population includes all layout plans of the railway station drainage facility network system, each layout plan is an individual, and all individuals satisfy the previous constraint conditions.

[0089] The multi-objective particle swarm optimization algorithm is a MOPSO algorithm; the MOPSO algorithm is used to iteratively optimize the solutions in the alternative solution set. When the number of iterations reaches 200 or the population converges, the iterative optimization is terminated and the global optimal solution is output, that is, the optimal layout plan of the longitudinal and transverse linear drainage facilities is output.

[0090] Specifically, the alternative solution set is the initial population of the MOPSO algorithm; an individual in the alternative solution set is a particle of the MOPSO algorithm; the method for updating the particle position and velocity of the MOPSO algorithm is the same as that of the traditional particle swarm algorithm, and is calculated using the following formula:

[0091] ;

[0092] Where: and Respectively represent the current particle The position vector and The position vector at the moment is represents the position vector of the original particle, Represents the updated particle position vector; and Respectively represent the particles in The velocity vector and The velocity vector at the moment is represents the original velocity vector, represents the updated velocity vector; is the inertia weight value; and is the learning factor; and is a random number in the range [0,1]; Indicates the optimal particle solution for the current particle; Represents the global optimal solution of the current population;

[0093] Particles and The selection of particles is the key to the solution quality of the multi-objective particle swarm optimization algorithm, and determines the quality of the final layout plan of the drainage facility network system;

[0094] Among them, the The particle update strategy is: during the iteration process, for each updated particle, determine whether it violates the constraint condition. If it violates the previous constraint condition or the next constraint condition, it will move in the opposite direction to the new position at half the speed of the previous movement, and will not be copied to the external file. The particle is not changed; if the pre-constraint and post-constraint conditions are not violated, the particle is The control criterion compares the value of the engineering cost objective function with the value of the drainage efficiency objective function to determine whether the updated particle is Specifically, when the value of the engineering cost objective function and the value of the drainage efficiency objective function of the updated particle are better than that of the When a particle is updated, it is decided to replace it with the updated particle. Particles, and copy the updated particles to the external file; conversely, The particles are not changed, and the updated particles are not copied to the external archive;

[0095] It is stated The particle update strategy is: based on the congestion of particles in the external file To update an external file and select Particles, set the external archive capacity to 1 to 1.5 times the initial number of particles (specifically 1.5 times can be selected). When the number of external archive records exceeds the archive capacity, sort the particles from small to large in terms of congestion, retain the particles with small congestion, delete the particles that overflow the external archive, and select the particle with the smallest congestion as the next particle in each iteration. Particles. The particle crowding is calculated by the following formula:

[0096] ;

[0097] Where: Represents two solution particles and Distance in solution space; and Respectively represent the cost objective function of a particle project in the external file The value of and drainage efficiency objective function The value of and Respectively represent the cost objective function of another particle in the external file The value of and drainage efficiency objective function The value of and They represent the maximum value of the engineering cost objective function and the maximum value of the drainage efficiency objective function of the particles in the external archive respectively; and They represent the minimum value of the engineering cost objective function and the minimum value of the drainage efficiency objective function of the particles in the external archive respectively; represents the crowdedness of particles; Indicates that each particle and particle The solution space distance The number of each particle after sorting and numbering from small to large; Represents particles and the sorted numbers are The distance of the particle in the solution space; Indicates the number of closest particles required to calculate crowding.

[0098] The method for laying out a railway station drainage facility network system also includes step S4 of laying out an inspection well; when the difference between the ditch bottom elevation at the connection point between the drainage facility and the bridge culvert and the elevation of the top of the bridge culvert is positive, an opening is required at the top of the bridge culvert to receive water flow, and an inspection well is required to be set at the connection point between the drainage facility and the bridge culvert.

[0099] By adopting the railway station drainage facility network system deployment method described in this embodiment, a set of excellent railway station drainage facility network system solutions can be deployed quickly, intelligently and collaboratively, which can not only improve design efficiency, but also enhance the station's risk resistance and promote the sustainable development of railway stations.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for laying out a network system of drainage facilities in a railway station, characterized in that: include: Step S1, obtaining initial data on the layout of the railway station drainage facility network system; Step S2, extracting decision variables according to the initial data; Determine the engineering cost objective function according to the decision variables; determine the drainage efficiency objective function according to the decision variables combined with the hydrodynamic model SWMM; determine the constraint conditions according to the railway yard road and drainage design specifications and the railway station and hub design specifications; A drainage facility network system optimization model is constructed based on the decision variables, the engineering cost objective function, the drainage efficiency objective function and the constraint conditions; Step S3, initializing the drainage facility network system optimization model to generate an initial population; using a multi-objective differential evolution algorithm to perform differential evolution operations on the initial population to quickly generate a set of alternative solutions; using a multi-objective particle swarm optimization algorithm to iteratively optimize the solutions in the set of alternative solutions to output a global optimal solution.

2. The method for laying out a railway yard drainage facility network system according to claim 1, characterized in that: The initial data include paving type, cross-sectional form, structural width, ditch bottom width, minimum drainage slope, minimum starting ditch depth, maximum ditch depth and ground data information of the station design area and baseline data information of different drainage facilities.

3. The method for laying out a railway yard drainage facility network system according to claim 1, characterized in that: Before extracting the decision variables, a three-dimensional coordinate system is established with the starting point of the station baseline as the coordinate origin. ;in, The axis is the horizontal axis of the plane, which is parallel to the station baseline; Axis is the plane ordinate axis, which is The axis is vertical and is set in the station plane; The axis is the elevation coordinate axis, which is set perpendicular to the station plane; The decision variables include the decision variables of the longitudinal drainage grooves on the roadbed surface , Decision variables of transverse drainage grooves on roadbed surface and decision variables for drainage facilities outside the roadbed ; in, ; For the The coordinate vector of the control point of the longitudinal drainage ditch on the roadbed surface, Take 1, 2, ..., Any value in ; is the number of longitudinal drainage grooves on the roadbed surface; ; , and Respectively represent the longitudinal drainage grooves on the roadbed surface The horizontal coordinate value, vertical coordinate value and elevation coordinate value of each control point. Take 1, 2, ... to Any value in ; is the number of control points of the longitudinal drainage ditch on the roadbed surface, and the arrangement order of each control point is arranged according to the arrangement order of the longitudinal drainage ditch on the roadbed surface from the starting point to the end point; ; For the The coordinate vector of the control point of the transverse drainage ditch on the roadbed surface, Take 1, 2, ... to Any value in ; is the number of transverse drainage grooves on the roadbed surface; ; , and They respectively represent the horizontal coordinate value, vertical coordinate value and elevation coordinate value of the control point at the starting point of the transverse drainage groove; , and They respectively represent the horizontal coordinate value, vertical coordinate value and elevation coordinate value of the control point at the end point of the transverse drainage groove; ; For the The coordinate vector of the control point of the drainage facility outside the roadbed; Take 1, 2, ... to Any value in ; The number of drainage facilities outside the roadbed; ; , and Respectively represent the drainage facilities outside the roadbed The horizontal coordinate value, vertical coordinate value and elevation coordinate value of each control point. Take 1, 2, ... to Any value in ; It is the number of control points of the external drainage facilities of the roadbed, and the arrangement order of each control point is arranged according to the arrangement order of the external drainage facilities of the roadbed from the starting point to the end point.

4. The method for laying out a railway yard drainage facility network system according to claim 1, characterized in that: The engineering cost objective function is: ; in, For the The construction cost of the roadbed drainage facilities; For the The construction cost of drainage facilities outside the roadbed; Indicates the number of drainage facilities on the roadbed surface. ; Indicates the number of drainage facilities outside the roadbed. ; The drainage efficiency objective function is: ; in, The number of drainage outlets at the bridge culvert for drainage facilities; Indicates The average drainage flow rate of each drainage outlet.

5. The method for laying out a railway yard drainage facility network system according to claim 1, characterized in that: The constraint conditions include maintenance constraints, hydraulic constraints, inter-facility constraints and other constraints; among them, the constraint conditions that can be judged whether they are satisfied before the hydrodynamic model SWMM is calculated are called pre-constraint conditions; the constraint conditions that can be judged whether they are satisfied only after the hydrodynamic model SWMM is calculated are called post-constraint conditions; The maintenance constraints adopt the following constraints: ; in, Refers to the ditch depth of the drainage facilities on the roadbed surface; It is the maximum trench depth limit, and its value is determined by the trench bottom width of the facility; The hydraulic constraints adopt the following constraints: ; in: ; Indicates the longitudinal slope of the drainage facilities outside the roadbed; Indicates the longitudinal slope of the longitudinal drainage ditch on the roadbed surface; Indicates the starting depth of the longitudinal drainage ditch on the roadbed surface; Indicates the longitudinal slope of the transverse drainage ditch; Indicates the starting depth of the transverse drainage groove; Indicates the ditch depth of drainage facilities outside the roadbed; Indicates the water depth of the drainage facilities outside the roadbed; Indicates the downstream slope Greater than or equal to upstream slope ; Indicates the maximum average flow velocity of water; Indicates the average flow velocity of water; The minimum drainage slope of the longitudinal drainage ditch on the roadbed surface; It is the minimum drainage slope of the drainage facilities outside the roadbed; is the minimum drainage slope of the transverse drainage ditch; The minimum depth of the longitudinal drainage groove starting point; The minimum groove depth at the starting point of the transverse drainage groove; Refers to the elevation of the starting point of the longitudinal drainage ditch on the roadbed surface; Refers to the elevation of the roadbed surface at the starting point of the transverse drainage ditch; Indicates the starting point and bottom elevation of the longitudinal drainage ditch on the roadbed surface; Indicates the starting point and bottom elevation of the transverse drainage ditch on the roadbed surface; The inter-facility constraints adopt the following constraints: ; in, Indicates the bottom elevation of the end point of the transverse drainage ditch; Indicates the bottom elevation of the drainage facility outside the roadbed corresponding to the end point of the transverse drainage ditch; Indicates the bottom elevation of the end point of the longitudinal drainage ditch on the roadbed surface; Indicates the elevation of the bottom of the transverse drainage ditch at the connection; Indicates the design elevation of the water discharge surface at the bridge-culvert connection; Indicates the drainage facilities outside the roadbed The ground elevation at the control point; The other constraints adopt the following constraints: ; in, Indicates drainage facilities The elevation of the roadbed surface at the control point; Indicates drainage facilities The shoulder elevation corresponding to the control point; Indicates that the horizontal coordinate of the drainage facilities in the initial population individuals is The point corresponding to Coordinate values, For the current The corresponding horizontal coordinate value; Indicates the allowable lateral displacement of drainage facilities outside the roadbed.

6. The method for laying out a railway yard drainage facility network system according to claim 5, characterized in that: The multi-objective differential evolution algorithm is a MODE algorithm; the MODE algorithm is used to randomly select three individuals from the initial population for mutation, crossover and selection operations, and the selection operation is used to determine whether the new individual replaces the current individual; wherein the selection operation is performed based on whether the new individual satisfies the post-constraint condition; if the new individual does not satisfy the post-constraint condition, the current individual is not replaced; if the new individual satisfies the post-constraint condition, the new individual is replaced by the new individual. A dominance criterion is used to compare the value of the engineering cost objective function with the value of the drainage efficiency objective function, judge the advantages and disadvantages of the new individual and the current individual, and decide whether the new individual should replace the current individual; The MODE algorithm is used to cycle the mutation, crossover and selection operations, and when the population reaches the maximum differential evolution times of 100 to 300 times, the population differential evolution is terminated, and the current solution population is the alternative solution set; The initial population includes all layout plans of the railway station drainage facility network system, each layout plan is an individual, and all individuals satisfy the previous constraint conditions.

7. The method for laying out a railway yard drainage facility network system according to claim 6, characterized in that: The multi-objective particle swarm optimization algorithm is a MOPSO algorithm; the MOPSO algorithm is used to iteratively optimize the solutions in the alternative solution set. When the number of iterations reaches 200 to 500 times or the population converges, the iterative optimization is terminated and a global optimal solution is output, that is, an optimal layout plan for longitudinal and transverse linear drainage facilities is output.

8. The method for laying out a railway yard drainage facility network system according to claim 1, characterized in that: It also includes step S4 of laying out an inspection well; when the difference between the ditch bottom elevation and the bridge culvert top elevation at the drainage facility and the bridge culvert connection point is positive, an opening is required at the bridge culvert top to receive water flow, and an inspection well is required at the drainage facility and the bridge culvert connection point.

9. A computer storage medium, characterized in that: Computer program instructions are stored thereon, and when the computer program instructions are executed by a processor, a method for laying out a railway yard drainage facility network system as described in any one of claims 1 to 8 is implemented.

10. An electronic device, characterized in that: include: At least one processor, at least one memory and computer program instructions stored in the memory, when the computer program instructions are executed by the processor, implement the railway yard drainage facility network system layout method as described in any one of claims 1 to 8.

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