Construction area three-dimensional water flow database construction method based on MIKE3 model

Abstract

The invention relates to the technical field of hydrodynamic simulation and inland waterway engineering construction assistance, in particular to a construction area three-dimensional water flow database construction method based on an MIKE3 model. Comprising the following steps: S1, constructing a two-dimensional hydrodynamic model of a Flexible Mesh structure, and carrying out model verification by utilizing actually measured data according to the terrain, boundary conditions and hydrological data of a construction area; according to the method, the complete three-dimensional water flow database covering the construction area is constructed, so that the water flow distribution state at any time point and any spatial position can be quickly inquired and dynamically predicted, and the precision and timeliness of water flow environment perception during construction are effectively improved; the device is particularly suitable for supporting accurate hoisting construction of underwater structure blocks such as accropode blocks under the condition of high-disturbance water flow, and the accuracy of construction control, the working efficiency and the working safety guarantee capability of personnel are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of hydrodynamics simulation and inland waterway engineering construction auxiliary technology, and in particular to a method for constructing a three-dimensional water flow database in a construction area based on a MIKE3 model. Background Art

[0002] With the impoundment of the Three Gorges Dam and the expansion and upgrading of inland waterways, deepwater construction technology also needs to be continuously improved. Engineering projects place higher demands on the precise understanding and dynamic control of the water flow environment in the construction area. This is especially true during the lifting and placement of large prefabricated components such as twisting blocks. The spatial distribution, temporal changes, and disturbance characteristics of water flow have a decisive impact on operational safety, accuracy, and construction efficiency. Traditional hydrological survey methods and two-dimensional water flow simulation methods have significant shortcomings when dealing with complex river topography, structural disturbance effects, and non-constant hydrodynamic conditions. They are unable to meet the high-precision, real-time flow field analysis and prediction requirements in deepwater operations.

[0003] The MIKE series of hydrodynamic models are widely used in water environment simulation due to their excellent mathematical structure and adaptability. However, applications based on the MIKE3 model, which can be used to perform local 3D modeling of specific construction areas and form a queryable and reusable water flow database to support the full lifecycle management of construction projects, are still relatively scarce. In particular, there is a lack of systematic solutions for deepwater component placement areas in inland rivers.

[0004] Based on this, the present invention provides a method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model. By constructing a complete three-dimensional water flow database covering the construction area, the present invention can realize rapid query and dynamic prediction of the water flow distribution state at any time point and any spatial position. This method effectively improves the accuracy and timeliness of water flow environment perception during construction, and is particularly suitable for supporting the precise lifting and placing operations of underwater structural blocks such as twisted king blocks under highly disturbed water flow conditions, significantly enhancing the accuracy of construction control, work efficiency and personnel work safety assurance capabilities.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a method for constructing a three-dimensional water flow database in a construction area based on a MIKE3 model, comprising the following steps:

[0008] S1: Construct a two-dimensional hydrodynamic model of the Flexible Mesh structure based on the topography, boundary conditions, and hydrological data of the construction area, and verify the model using measured data;

[0009] S2: After the two-dimensional model is verified, the MIKE3 FM three-dimensional grid system is used for vertical layering, and a three-dimensional water flow model is constructed using a vertical subdivision structure of no less than 10 layers;

[0010] S3: Perform long-term simulation based on the three-dimensional model, outputting three-dimensional flow field data including coordinate position, three-dimensional velocity components and composite velocity modulus every hour, storing them in a four-dimensional structured manner of "time-transverse coordinate-longitudinal coordinate-depth", and establishing a three-dimensional water flow database;

[0011] S4: Verify the simulation accuracy of the 3D model through measured flow velocity and water level data;

[0012] S5: During the construction period, the three-dimensional water flow distribution of the target positioning point is calculated based on the measured tide level and wind speed environmental data combined with the database.

[0013] The Flexible Mesh structure in S1 is an irregular triangular mesh with a total of 7678 nodes.

[0014] In the model verification, the water level simulation error does not exceed 0.05m, and the flow velocity error is controlled within 12%.

[0015] The vertical stratification in S2 is divided into 10 layers using a coordinate system to capture the vertical characteristics of tidal currents varying with depth.

[0016] The S3 database supports indexing and querying by time, spatial coordinates, and depth levels.

[0017] The S3 database uses a structured spatiotemporal hierarchical indexing mechanism, and the specific operations are as follows:

[0018] S4.1: Data is organized in a four-dimensional structured manner: time, horizontal coordinate, vertical coordinate, and depth.

[0019] S4.2: Each three-dimensional flow field data includes coordinate position, three-dimensional velocity components and composite velocity modulus;

[0020] S4.3: Support for velocity prediction at non-grid points using spatial and temporal interpolation functions.

[0021] The specific steps in S5 are as follows:

[0022] S5.1: Receive real-time hydrological sensor data from the construction site and perform data assimilation processing;

[0023] S5.2: Compare with similar environmental conditions in the historical database and generate a water flow risk assessment report;

[0024] S5.3: Output three-dimensional water flow prediction maps to provide visual decision support for the hanging path analysis, precise positioning and lowering operations of underwater structures such as twisted king blocks.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] By constructing a complete three-dimensional water flow database covering the construction area, the present invention can realize rapid query and dynamic prediction of the water flow distribution status at any time point and any spatial position. This method effectively improves the accuracy and timeliness of water flow environment perception during construction, and is particularly suitable for supporting the precise hanging and swinging operations of underwater structural blocks such as twisted king blocks under highly disturbed water flow conditions, significantly enhancing the accuracy of construction control, work efficiency and personnel work safety assurance capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a system diagram of a method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model of the present invention.

[0028] Figure 2 This is a schematic diagram of the three-dimensional water flow grid division of the construction river section in the method for constructing a three-dimensional water flow database in the construction area based on the MIKE3 model of the present invention.

[0029] Figure 3 This is a diagram for setting the boundary conditions of upstream flow and downstream water level in a method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model of the present invention.

[0030] Figure 4 This is a schematic diagram of the three-dimensional water flow model results in a method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model of the present invention.

[0031] Figure 5 This is a schematic diagram of single-point flow velocity extraction from a three-dimensional database in a method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Example:

[0034] like Figure 1-Figure 5 As shown, this embodiment provides a method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model, comprising the following steps:

[0035] S1: Construct a two-dimensional hydrodynamic model of the Flexible Mesh structure based on the topography, boundary conditions, and hydrological data of the construction area, and verify the model using measured data;

[0036] S2: After the two-dimensional model is verified, the MIKE3 FM three-dimensional grid system is used for vertical layering, and a three-dimensional water flow model is constructed using a vertical subdivision structure of no less than 10 layers;

[0037] S3: Perform long-term simulation based on the three-dimensional model, outputting three-dimensional flow field data including coordinate position, three-dimensional velocity components and composite velocity modulus every hour, storing them in a four-dimensional structured manner of "time-transverse coordinate-longitudinal coordinate-depth", and establishing a three-dimensional water flow database;

[0038] S4: Verify the simulation accuracy of the 3D model through measured flow velocity and water level data;

[0039] S5: During the construction period, the three-dimensional water flow distribution of the target positioning point is calculated based on the measured tide level and wind speed environmental data combined with the database.

[0040] The Flexible Mesh structure in S1 is an irregular triangular mesh with a total of 7678 nodes.

[0041] In the model verification, the water level simulation error does not exceed 0.05m, and the flow velocity error is controlled within 12%.

[0042] The vertical stratification in S2 is divided into 10 layers using a coordinate system to capture the vertical characteristics of tidal currents varying with depth.

[0043] The S3 database supports indexing and querying by time, spatial coordinates, and depth levels.

[0044] The S3 database uses a structured spatiotemporal hierarchical indexing mechanism, and the specific operations are as follows:

[0045] S4.1: Data is organized in a four-dimensional structured manner: time, horizontal coordinate, vertical coordinate, and depth.

[0046] S4.2: Each three-dimensional flow field data includes coordinate position, three-dimensional velocity components and composite velocity modulus;

[0047] S4.3: Support for velocity prediction at non-grid points using spatial and temporal interpolation functions.

[0048] The specific steps in S5 are as follows:

[0049] S5.1: Receive real-time hydrological sensor data from the construction site and perform data assimilation processing;

[0050] S5.2: Compare with similar environmental conditions in the historical database and generate a water flow risk assessment report;

[0051] S5.3: Output 3D water flow prediction maps to provide visual decision support for the analysis of the hanging path, precise positioning, and lowering operations of underwater structures such as the twisted king block.

[0052] like Figure 1-Figure 5 As shown, this embodiment provides a method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model. The specific method is as follows: First, the MIKE3 FM module in the MIKE series hydrodynamic modeling software is used to establish an unstructured grid model in the target construction area. The grid type used is a triangular grid, which can adapt to complex river terrain and water depth changes. The grid divides the construction area reasonably, accurately covers the main section and key operation points of the construction area, and ensures the spatial resolution of the model calculation. Subsequently, the measured hydrological data from 2009 to 2020 are collected and sorted, including parameters such as water level, flow, wind speed and direction, and river section terrain, as boundary conditions and initial conditions input into the model, and the MIKE3 in the MIKE3 system is used. The FM module performs three-dimensional hydraulic simulation operations. The simulation runs continuously at one-hour time intervals, outputting a set of three-dimensional water flow data for each time step, including coordinate position (x, y), three-dimensional velocity components (u, v, w), and composite velocity modulus (U). It is evenly layered vertically into 10 layers. The simulation output data is organized according to the "one group every six months" rule, and data archiving and coding management are performed on an annual basis. Ultimately, a large three-dimensional water flow database containing 10-year, all-weather, and full-section information is constructed. During the construction phase, the real-time water level and flow information of the construction section is obtained to quickly retrieve data nodes corresponding to similar boundary conditions in the database. Through interpolation algorithms or data deduction methods, a local three-dimensional water flow distribution map of the construction operation point is quickly generated. This distribution information can be directly used to guide the precise hanging and placing operations of structural blocks such as the twisted king block, provide fixed-point flow field characteristic predictions, effectively reduce the risks of structural displacement, swing, and impact, and improve construction operation accuracy.

[0053] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0054] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model, characterized in that: The following steps are involved: S1: Construct a two-dimensional hydrodynamic model of the Flexible Mesh structure based on the topography, boundary conditions, and hydrological data of the construction area, and verify the model using measured data; S2: After the two-dimensional model is verified, the MIKE3 FM three-dimensional grid system is used for vertical layering, and a three-dimensional water flow model is constructed using a vertical subdivision structure of no less than 10 layers; S3: Performs long-term simulation based on a three-dimensional model, outputting three-dimensional flow field data including coordinates, velocity components, and velocity modulus every hour. This data is stored in a four-dimensional structured format of "time-horizontal coordinates-vertical coordinates-depth" to establish a three-dimensional water flow database. S4: Verify the simulation accuracy of the 3D model through measured flow velocity and water level data; S5: During the construction period, the three-dimensional water flow distribution of the target positioning point is calculated based on the measured tide level and wind speed environmental data combined with the database.

2. The method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model according to claim 1, characterized in that: The Flexible Mesh structure in S1 is an irregular triangular mesh with a total of 7678 nodes.

3. The method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model according to claim 2, characterized in that: In the model verification, the water level simulation error does not exceed 0.05m, and the flow velocity error is controlled within 12%.

4. The method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model according to claim 1, characterized in that: The vertical stratification in S2 is divided into 10 layers using a coordinate system to capture the vertical characteristics of tidal currents varying with depth.

5. The method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model according to claim 1, characterized in that: The S3 database supports indexing and querying by time, spatial coordinates, and depth levels.

6. The method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model according to claim 5, characterized in that: The S3 database uses a structured spatiotemporal hierarchical indexing mechanism, and the specific operations are as follows: S4.1: Data is organized in a four-dimensional structure: time, horizontal coordinate, vertical coordinate, and depth. S4.2: Each three-dimensional flow field data includes coordinate position, three-dimensional velocity components and composite velocity modulus; S4.3: Support for velocity prediction at non-grid points using spatial and temporal interpolation functions.

7. The method for constructing a three-dimensional water flow database in a construction area based on the MIKE3 model according to claim 1, characterized in that: The specific steps in S5 are as follows: S5.1: Receive real-time hydrological sensor data from the construction site and perform data assimilation processing; S5.2: Compare with similar environmental conditions in the historical database and generate a water flow risk assessment report; S5.3: Output 3D water flow prediction maps to provide visual decision support for the lifting path analysis, precise positioning, and lowering operations of underwater structures such as twisted king blocks.

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