CN-122022209-A - Method, system, electronic equipment and medium for evaluating drainage capacity of underpass

CN122022209ACN 122022209 ACN122022209 ACN 122022209ACN-122022209-A

Abstract

The embodiment of the specification discloses a method, a system, electronic equipment and a medium for evaluating drainage capacity of a underpass. The method for evaluating the drainage capacity of the lower through channel comprises the steps of determining a water collecting area corresponding to the lower through channel step by step based on geographic information and drainage facility data, obtaining a preset hydrologic hydrodynamic model, simulating the production flow, the collection flow and the movement process of rainwater in a pipe network system in different rainfall scenes according to the hydrologic hydrodynamic model to obtain model simulation data, determining drainage state data of the pipe network system according to the model simulation data, wherein the drainage state data comprises overflow data of drainage nodes in the pipe network system, load rate and operation state data of the pipe network system, and determining drainage capacity data corresponding to the lower through channel based on the drainage state data. According to the embodiment of the specification, the reliability of the evaluation result of the drainage capacity of the underpass is improved.

Inventors

Lou Yihan
TANG ZIYI
Wang luoyang
ZHOU YATING
ZHANG YUZHOU

Assignees

杭州蚁图科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260416

Claims (10)

1. A method for evaluating drainage capacity of a underpass, comprising: Acquiring geographical information and drainage facility data of a lower crossing, and determining a catchment area corresponding to the lower crossing step by step based on the geographical information and the drainage facility data; Acquiring a preset hydrologic hydrodynamic model, and simulating the flow and confluence of rainwater in a water collecting area and the movement process in a pipe network system under different rainfall scenes according to the hydrologic hydrodynamic model to obtain model simulation data, wherein the hydrologic hydrodynamic model at least comprises a surface flow model for calculating the net rainfall and a nonlinear reservoir method surface confluence model for simulating the runoff pooling process; determining drainage state data of the pipe network system according to the model simulation data, wherein the drainage state data comprises overflow data of each drainage node in the pipe network system, load rate of the pipe network system and running state data; And determining the drainage capacity data corresponding to the lower through channel based on the drainage state data, wherein the drainage capacity data is used for evaluating the drainage capacity of the lower through channel, and the drainage capacity data at least comprises the maximum sustainable rainfall of the lower through channel, the water-collecting area verification data and the design standard compliance evaluation data.
2. The method of claim 1, wherein the step-wise determining the catchment area corresponding to the underpass based on the geographic information and drainage facility data comprises: acquiring a digital elevation model in the geographic information; determining a terrain watershed and a main river channel of the area where the underpass is located based on the digital elevation model; Taking the terrain watershed and the main river channel as boundaries, and determining a plurality of first-level catchment areas corresponding to the areas where the underpass is located; acquiring key facility sites of the region where the underpass is located based on preset specification data, wherein the key facility sites at least comprise drainage nodes; And determining a plurality of secondary catchment areas according to the plurality of primary catchment areas based on the drainage facility data and the key facility sites, wherein each secondary catchment area comprises a drainage node.
3. The method of claim 1, wherein the surface production model is used to calculate a net rainfall, the process of calculating a net rainfall comprising: based on any rainfall scene, acquiring rainfall intensity corresponding to any water collecting area in preset duration and filling depth; determining the infiltration loss corresponding to the arbitrary catchment area based on an infiltration model, wherein the infiltration model is that I is the infiltration loss, In order to stabilize the infiltration rate, For the initial infiltration rate, t is a preset duration, and beta is an empirical constant related to soil characteristics; and determining the net rain intensity of the arbitrary water collecting area in a preset time period corresponding to the arbitrary rainfall scene according to the rainfall intensity, the depression filling depth and the infiltration loss, wherein the net rain intensity is the difference value between the rainfall intensity and the depression filling depth as well as between the rainfall intensity and the infiltration loss.
4. The method of claim 1, wherein the nonlinear reservoir surface confluence model is , The net rain intensity corresponding to the time variation of any catchment area determined according to the surface runoff model is obtained; For the corresponding outflow of any catchment area with time, And K is a storage capacity coefficient, and n is a dimensionless constant between 0 and 1.
5. The method of claim 1, wherein said determining drainage status data of the pipe network system from the model simulation data comprises: determining the corresponding outlet flow of the arbitrary catchment area along with the time change according to the model simulation data, wherein the outlet flow is the inlet flow of the arbitrary catchment area injected into the corresponding drainage node; Based on a preset pipe network hydraulic model, injecting the inlet flow of the arbitrary catchment area into the corresponding drainage node to input the pipe network hydraulic model, wherein the pipe network hydraulic model simulates the flow, the water level and the pressure change process of water in the drainage node corresponding to the arbitrary catchment area according to the Saint Vinan equation set to obtain the node water level of the drainage node corresponding to the arbitrary catchment area; and when the node water level is greater than a preset ground elevation, judging that the drainage node corresponding to the arbitrary water collecting area is in an overflow state, and determining overflow data of the drainage node corresponding to the arbitrary water collecting area according to the node water level and the ground elevation.
6. The method of claim 5, wherein determining drainage status data of the pipe network system from the model simulation data comprises: Determining water depth data of any pipeline in any catchment area at each time step according to the pipe network hydraulic model based on a preset time step; Based on the preset pipeline diameter of any one pipeline, acquiring the instantaneous load rate of the any one pipeline at any one time step, wherein the instantaneous load rate is the ratio between the water depth data of the any one pipeline at any one time step and the preset pipeline diameter; And obtaining the instantaneous load rate of any pipeline at each time step, and determining the maximum instantaneous load rate through sequencing.
7. The method of claim 6, wherein determining drainage status data of the pipe network system from the model simulation data comprises: based on the pipe network hydraulic model, pump station operation data of any pump station in the pipe network system are obtained, wherein the pump station operation data comprise pump station front pool water level time sequence data, pump station start-stop state time sequence data and instantaneous pump drainage flow time sequence data; determining the number of times of water level exceeding the pump station water level threshold value by the forebay water level of any pump station in the simulation duration according to the pump station forebay water level time sequence data based on the simulation duration corresponding to the rainfall scene and a preset pump station water level threshold value; determining the start and stop times of any pump station in the simulation duration based on the pump set start and stop state time sequence data; And determining total pump drainage flow data of any pump station based on the instantaneous pump drainage flow time sequence data and the simulation duration.
8. A underpass drainage capacity assessment system, comprising: The area determining module is used for acquiring geographical information and drainage facility data of the lower crossing and determining a catchment area corresponding to the lower crossing step by step based on the geographical information and the drainage facility data; The system comprises a scene simulation module, a model simulation module and a flow control module, wherein the scene simulation module is used for acquiring a preset hydrologic hydrodynamic model, and simulating the flow generation and flow collection of rainwater in a catchment area and the movement process in a pipe network system according to the hydrologic hydrodynamic model to obtain model simulation data under different rainfall scenes; the state determining module is used for determining drainage state data of the pipe network system according to the model simulation data, wherein the drainage state data comprise overflow data of each drainage node in the pipe network system, load rate of the pipe network system and running state data; The drainage evaluation module is used for determining drainage capacity data corresponding to the underpass based on the drainage state data, wherein the drainage capacity data are used for evaluating the drainage capacity of the underpass, and the drainage capacity data at least comprise maximum bearable rainfall, catchment area verification data and design standard compliance evaluation data of the underpass.
9. An electronic device comprising a memory storing an application and a processor for running the application in the memory to perform the steps of the down-through drainage capability assessment method of any one of claims 1 to 7.
10. A computer readable storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the steps in the under-run drainage capability assessment method of any one of claims 1 to 7.

Description

Method, system, electronic equipment and medium for evaluating drainage capacity of underpass Technical Field The application relates to the technical field of drainage and evaluation of underpass, in particular to a drainage and waterlogging capacity evaluation method, system, electronic equipment and medium for underpass. Background With the rapid development of urban traffic networks, underpass such as underpass overpasses, railways, highway tunnels and the like have become key nodes of urban traffic. However, due to the inherent characteristics of the underpass with low topography, the underpass is exposed to serious waterlogging risks in heavy rainfall weather, so that traffic interruption is possibly caused, and serious losses are more likely to be caused. Therefore, the accurate assessment of the drainage capacity of the underpass becomes a critical and urgent task in urban flood control drainage management and public safety emergency systems. At present, the method for evaluating the drainage capacity of the underpass mainly comprises a static experience evaluation method based on a scheme file, namely, a flood prevention emergency treatment scheme is formulated for each underpass, wherein the static experience evaluation method generally comprises basic responsible person information, material configuration and qualitative treatment flow based on historical experience, and a generalized calculation method based on a simplified formula or a manual, namely, an empirical formula or an inference formula method in the hydrological manual is adopted, and whether the design flow of a drainage pump station meets the requirement is checked by calculating the design rain intensity and roughly estimating the water concentration and the runoff coefficient. However, the traditional empirical formula or simplified hydrologic method cannot simulate the surface flooding process after the pipe network is overloaded, the influence of the start and stop of a pump station on the water level and the dynamic evolution of accumulated water in a low-lying place, so that the existing underpass drainage capacity assessment method is difficult to realize fine simulation, the reliability of the assessment output result of the existing underpass drainage capacity assessment method is low, the decision support capacity is limited, each link highly depends on the personal experience of technicians, and a standardized and reusable technical process cannot be formed. Therefore, there is a need for a method for evaluating the drainage capacity of a lower tunnel that can improve the reliability of the evaluation result of drainage capacity of a lower tunnel and can construct a systematic and standardized evaluation flow. Disclosure of Invention The embodiment of the specification provides a method, a system, electronic equipment and a medium for evaluating drainage capacity of a underpass, which have the following technical scheme: According to the method, geographical information and drainage facility data of a lower through channel are obtained, a water collecting area corresponding to the lower through channel is determined step by step based on the geographical information and the drainage facility data, a preset hydrologic hydrodynamic model is obtained, the flow, the collection and the movement processes of rainwater in a water collecting area in different rainfall scenes are simulated according to the hydrologic hydrodynamic model, model simulation data are obtained, the hydrologic hydrodynamic model at least comprises a surface flow model for calculating the net rainfall and a nonlinear reservoir method surface flow collection model for simulating the runoff collection process, drainage state data of a pipe network system are determined according to the model simulation data, the drainage state data comprise overflow data of all drainage nodes in the pipe network system, the load rate and running state data of the pipe network system, drainage capacity data corresponding to the lower through channel are determined based on the drainage state data, and the drainage capacity data at least comprise maximum water bearing capacity and drainage area verification data of the lower through channel are used for evaluating drainage capacity of the lower through channel. According to the second aspect, the embodiment of the specification provides a drainage capacity evaluation system of a lower through channel, which comprises a region determining module, a scene simulating module and a drainage evaluation module, wherein the region determining module is used for obtaining geographical information of the lower through channel and drainage facility data and determining a water collecting region corresponding to the lower through channel step by step based on the geographical information and the drainage facility data, the scene simulating module is used for obtaining a preset hydrologic hydrodynamic model, simulating the production flow