CN115114809A - Method and system for calculating loss of cabin overflow construction - Google Patents
Method and system for calculating loss of cabin overflow construction Download PDFInfo
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Abstract
The invention belongs to the technical field of a method for calculating the loading overflow construction loss, and particularly relates to a method and a system for calculating the loading overflow construction loss, wherein the method for calculating the loading overflow construction loss comprises the following steps: the method comprises the following steps: collecting basic data; step two: building a power flow model; step three: calculating the converted overflow sediment concentration: the converted overflow sediment concentration is the monitored stable sediment concentration multiplied by a reduction coefficient Cv and Cs, wherein Cv is the reduction coefficient caused by the cabin volume, Cv is 0.8-1, and Cs is the reduction coefficient caused by the sediment particle size; cs is 0.8-1; step four: building an overflow sediment movement model; step five: overflow simulation and loss calculation for different periods of time. The invention provides a method and a system for calculating the loss of the loading overflow construction of silt falling out of a channel range.
Description
Technical Field
The invention belongs to the technical field of cabin filling loss calculation, and particularly relates to a method and a system for calculating a cabin filling overflow construction loss.
Background
The prior art is as follows:
the cabin-loading construction method is the main construction method of the trailing suction hopper dredger, and in order to increase the cabin-loading earthwork, generally, after the slurry is filled to the set cabin volume, overflow construction needs to be carried out for a period of time. During the construction of loading and overflowing, the coarse silt particles and soil particles are precipitated in the mud cabin, and the fine silt particles are discharged out of the cabin along with the water flow overflowing out of the cabin, which is called overflow loss. Silt overflowing from the hold will move with the water flow until it sinks to the seabed.
However, the present inventors have found that the above prior art has at least the following technical problems:
and when the engineering quantity of the silt for dredging after construction is counted, silt which falls into the range of the channel can be contained, and the silt which falls out of the range of the channel can not be determined. Because the process of loading the dredging bottom mud by the dredger can cause overflow loss, the dredging engineering quantity calculated according to the volume of the navigation channel during project acceptance can be far less than the engineering quantity of the dredger during actual operation.
The difficulty and significance for solving the technical problems are as follows:
therefore, based on the problems, the calculation method for determining the loading overflow construction loss amount applied to the channel engineering, which can calculate the silt falling out of the channel range, has important practical value.
Disclosure of Invention
The invention aims to provide a method for calculating the loss of the cabin overflow construction, which comprises the following steps:
the method comprises the following steps: collecting basic data;
step two: building a power flow model: according to the basic data of the first step, adopting hydrodynamic force numerical simulation software to build a power flow model, wherein the power flow model range comprises: shoreside-channel engineering area-outer sea deepwater area, wherein the outer sea deepwater area is used as an open boundary of the model;
step three: calculating the converted overflow sediment concentration: the converted overflow sediment concentration is the monitored stable sediment concentration multiplied by a reduction coefficient Cv and Cs, wherein Cv is the reduction coefficient caused by the cabin volume, Cv is 0.8-1, and Cs is the reduction coefficient caused by the sediment particle size; cs is 0.8-1;
step four: building an overflow sediment movement model: building an overflow sediment movement model according to the power flow model obtained in the second step, setting overflow sediment as a moving point source, setting the movement track of the moving point source according to the construction track of the dredger, inputting sediment sedimentation speed into the overflow sediment model, and obtaining overflow sediment sedimentation in the range of the sea bed upper airway after the model is operated, wherein the parameters of the moving point source comprise the flow of the cabin overflow port and the concentration of the overflow sediment obtained in the third step; multiplying the overflow sediment concentration obtained in the step three by the overflow construction time to obtain the total amount of the overflow sediment of the dredger; subtracting the overflow sediment settling amount in the range of the channel on the seabed from the total overflow sediment amount to obtain the overflow sediment amount outside the channel, namely the overflow sediment loss amount;
step five: overflow simulation and loss calculation for different periods of time: selecting a time period of rising tide, falling tide, leveling tide or stopping tide, calculating the loss amount of the once overflowing silt, and then calculating the average value of at least three results to be used as the loss amount of the once cabin-filling overflowing construction; and multiplying the recorded times of the loading overflow construction operation of the dredger by the single loading overflow construction loss to obtain the total loading overflow construction loss during construction.
In the method for calculating the loss of the hold overflow construction, further, the basic data in the first step includes meteorological data, topographic data, tide level data, tide data, silt data and dredger operation parameters:
weather data: the meteorological data comprise wind field data, and a wind speed and wind direction time sequence in a time period is calculated;
topographic data: the terrain data comprises underwater terrain of a deep water area and underwater terrain data of a shallow water area near the shore of an engineering area;
tide level data: the tide level data comprise tide surface astronomical tide level data of a model open boundary position changing along with time and actually measured tide level data of at least one sampling point in a near-shore shallow water area of the engineering area changing along with time;
trend data: the power flow data comprises actually measured power flow data of at least one point position of the near-shore shallow water area of the engineering area along with time variation;
silt data: the silt data includes: the flow of an overflow port of the cabin, the particle size of overflow sediment, the concentration of the sediment and the sedimentation speed of the sediment;
dredger operation parameters: the dredger operation parameters comprise construction track of the dredger and loading overflow construction time.
In the method for calculating the loss of the loading overflow construction, the second step further includes the following steps:
s1, making a terrain mesh file required by calculation according to the terrain data;
s2, importing the terrain grid file obtained in S1, the wind field data and the astronomical tide level data of the tide table at the boundary opening position of the model as input files into simulation software, and setting time step length, simulation time, bottom friction resistance, vortex viscosity coefficient and dry-wet boundary parameters;
s3, operating the model, storing the tidal level of the sampling point, the flow velocity and the flow direction of the tidal current, and calculating the operation result of the grid area;
s4, respectively comparing the tide level, the flow speed and the flow direction of the sampling point obtained in the step S3 with actually measured tide level data and actually measured tide data of at least one sampling point in the near-shore shallow water area of the engineering area in the step I, namely comparing the tide level obtained by model calculation with the actually measured tide level, comparing the flow speed obtained by the model calculation with the actually measured flow speed, and comparing the flow direction obtained by the model calculation with the actually measured flow direction;
s5, rating the model: adjusting the model parameters according to the comparison result of S4, re-calculating the model and comparing the measured data with the simulated data;
s6, repeating the step S5 until the error of the simulated data and the measured data meets the precision requirement in the specification.
In the method for calculating the loss of the cabin overflow construction, further, the open edge of the tidal current model is defined in a place where the underwater bottom elevation gradient is less than 1:1000 and the water depth exceeds 20 m.
In the method for calculating the loss of the loading overflow construction, further, in the third step:
factors affecting Cs include silt particle size and hold time:
for the silt with the grain diameter of 0.05-0.005mm, when the loading time is less than 1 hour, the Cs is 0.8-0.85, when the loading time is 1-2 hours, the Cs is 0.85-0.9, when the loading time is 2-3 hours, the Cs is 0.9-0.93, when the loading time is more than 3 hours, the Cs is 0.93-1;
for the superfine sand with the grain diameter of 0.1-0.05mm, when the capsule loading time is less than 1 hour, the Cs is 0.85-0.9, when the capsule loading time is 1-2 hours, the Cs is 0.9-0.93, when the capsule loading time is 2-3 hours, the Cs is 0.93-0.95, and when the capsule loading time is more than 3 hours, the Cs is 0.95-1;
for fine sand with the grain diameter of 0.25-0.1mm, when the cabin loading time is less than 1 hour, the Cs is 0.9-0.93, when the cabin loading time is 1-2 hours, the Cs is 0.93-0.95, when the cabin loading time is 2-3 hours, the Cs is 0.95-0.97, when the cabin loading time is more than 3 hours, the Cs is 0.97-1;
for the medium sand with the grain diameter of 0.5-0.25mm, when the hold time is less than 1 hour, the Cs is 0.93-0.95, when the hold time is 1-2 hours, the Cs is 0.95-0.97, when the hold time is 2-3 hours, the Cs is 0.97-0.98, when the hold time is more than 3 hours, the Cs is 0.98-1;
for coarse sand with the particle size of 2-0.5mm, when the hold time is less than 1 hour, Cs is 0.95-0.97, when the hold time is 1-2 hours, Cs is 0.97-0.98, when the hold time is 2-3 hours, Cs is 0.98-0.99, when the hold time is more than 3 hours, Cs is 0.99-1;
factors that influence Cv include cabin volume and stowage time:
cabin volume 20000m 3 When the loading time is less than 1 hour, the Cv is 0.8-0.85, when the loading time is 1-2 hours, the Cv is 0.85-0.92, when the loading time is 2-3 hours, the Cv is 0.92-0.95, and when the loading time is more than 3 hours, the Cv is 0.95-0.99;
cabin volume 10000~20000m 3 When the loading time is less than 1 hour, the Cv is 0.85-0.88, when the loading time is 1-2 hours, the Cv is 0.88-0.94, when the loading time is 2-3 hours, the Cv is 0.94-0.96, when the loading time is more than 3 hours, the Cv is 0.96-0.99;
the volume of the cabin ranges from 6000m to 10000m 3 When the loading time is less than 1 hour, Cv is 0.86-0.9, when the loading time is 1-2 hours, Cv is 0.9-0.95, when the loading time is 2-3 hours, Cv is 0.95-0.97, when the loading time is more than 3 hours, Cv is 0.97-1;
cabin volume 6000m 3 When the loading time is less than 1 hour, Cv is 0.88-0.92, when the loading time is 1-2 hours, Cv is 0.92-0.96, when the loading time is 2-3 hours, Cv is 0.96-0.98, and when the loading time is more than 3 hours, Cv is 0.98-1.
A second object of the present invention is to provide a system for determining a load overflow construction loss amount, comprising:
a data collection module: collecting basic data;
a power flow model building module: according to the basic data of the first step, adopting hydrodynamic force numerical simulation software to build a power flow model, wherein the power flow model range comprises: shoreside-channel engineering area-outer sea deepwater area, wherein the outer sea deepwater area is used as an open boundary of the model;
a calculation module: calculating the converted overflow sediment concentration: the converted overflow sediment concentration is the monitored stable sediment concentration multiplied by a reduction coefficient Cv and Cs, wherein Cv is the reduction coefficient caused by the cabin volume, Cv is 0.8-1, and Cs is the reduction coefficient caused by the sediment particle size; cs is 0.8-1;
the overflow sediment movement model building module: building an overflow sediment movement model according to the power flow model obtained in the second step, setting overflow sediment as a moving point source, setting the movement track of the moving point source according to the construction track of the dredger, inputting sediment sedimentation speed into the overflow sediment model, and obtaining overflow sediment sedimentation in the range of the sea bed upper airway after the model is operated, wherein the parameters of the moving point source comprise the flow of the cabin overflow port and the concentration of the overflow sediment obtained in the third step; multiplying the overflow sediment concentration obtained in the step three by the overflow construction time to obtain the total amount of the overflow sediment of the dredger; subtracting the overflow sediment settling amount in the range of the channel on the seabed from the total overflow sediment amount to obtain the overflow sediment amount outside the channel, namely the overflow sediment loss amount;
a result analysis module: overflow simulation and loss calculation for different periods of time: selecting a time period of rising tide, falling tide, leveling tide or stopping tide, calculating the loss amount of the once overflowing silt, and then calculating the average value of at least three results to be used as the loss amount of the once cabin-filling overflowing construction; and multiplying the recorded times of the loading overflow construction operation of the dredger by the single loading overflow construction loss to obtain the total loading overflow construction loss during construction.
The third purpose of the invention is to provide an information data processing terminal, which is used for realizing the method for calculating the loss of the cabin overflow construction.
A fourth object of the present invention is to provide a computer-readable storage medium, comprising instructions which, when run on a computer, cause the computer to perform the above-described method for calculating a load lock overflow construction loss.
The invention has the advantages and positive effects that:
1. the invention can calculate the distribution quantity of the overflow sediment of the dredger sinking inside and outside the navigation channel and calculate the loading loss quantity of the loading overflow construction in the whole construction period. The method can be used for counting the actual engineering quantity of the dredger, and plays an important role in mastering the construction efficiency of the dredger and improving the construction process for a constructor.
2. The invention provides a method for calculating the overflow silt quantity distributed in and out of a channel range in the channel engineering cabin overflow construction process for the first time, and the method can be implemented by hydrodynamic force and silt numerical simulation software and has important significance for guiding the channel engineering overflow construction and counting the actual engineering quantity.
3. According to the method, natural conditions of a dredger construction sea area are analyzed, and main factors influencing the movement track of overflow sediment flowing into the sea and influencing the settlement area on the seabed are determined to be the grain diameter of the overflow sediment, the flow velocity and the flow direction of the tide.
4. Aiming at the unstable process of silt overflow at the overflow port of the dredger, the influence factors of the unstable process are identified to be the cabin volume and the silt particle size, and the converted overflow silt concentration is obtained through the corresponding overflow silt concentration reduction coefficients Cv and Cs.
Drawings
FIG. 1 is a schematic diagram of the computational method of the present invention.
Fig. 2 shows the process of changing the concentration of silt at the overflow port.
Fig. 3 is the flood tide process of the present invention.
Fig. 4 shows a bohai sea topography, a boundary, and a measured point location according to a second embodiment of the present invention.
FIG. 5 is a comparison of measured and model-calculated tidal levels according to example two of the present invention.
Fig. 6 is a comparison between the measured tidal current flow rate and the model calculated flow rate according to the second embodiment of the present invention.
Fig. 7 is a comparison between the measured power flow direction and the model calculated flow rate according to the second embodiment of the present invention.
Fig. 8-1 shows the unit area distribution of overflow silt on the seabed during the second tide fall according to the embodiment of the invention.
Fig. 8-2 shows the unit area distribution of the overflow sediment on the seabed at tidal rise of the second embodiment of the present invention.
Fig. 8-3 is a unit area distribution of overflow silt at the seabed at even tides according to embodiments of the present invention.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are exemplified and described in detail with reference to the accompanying drawings.
Example 1
A method for calculating the loss of the cabin overflow construction comprises the following steps:
the method comprises the following steps: basic data collection including meteorological data, topographic data, tide level data, tide data, silt data and dredger operation parameters;
step two: building and calibrating a power flow model;
step three: reducing the concentration of overflow silt;
step four: building an overflow sediment movement model;
step five: overflow simulation and loss calculation for different periods of time.
1. The method comprises the following steps: basic data collection
(1) Weather data
The method mainly comprises wind field data, and wind speed and wind direction time series in a calculation time period can be obtained from a meteorological station or adopt NECP wind field data.
(2) Topographic data
The power flow model range includes: the method comprises the steps of shoreside-navigation channel (engineering area) -open sea deepwater area, wherein the open sea deepwater area is used as an open boundary of a model and is determined at a place where the elevation gradient of an underwater bottom is gentle, the gradient is less than 1:1000, and the water depth is large (more than 20 m).
The terrain data comprises underwater terrain of a deep water area and underwater terrain data of a shallow water area near the shore of an engineering area. The underwater topography of the deepwater zone can be obtained from a chart; the project area near-shore shallow water area needs actual measurement data with higher precision, and the actual measurement data is generally in a CAD format. The tide in the deep water area is slightly influenced by the terrain, so high-precision bottom elevation data are not required; the tide of the shallow water area near the shore of the engineering area is greatly influenced by the terrain, so that underwater terrain data with high precision (CAD scale 1:500-1: 2000) is required.
(3) Tidal level data
Tidal level data includes two: firstly, opening astronomical tide level data (time and tide level) of a tide table, which are changed along with time, of a boundary position of the model, and setting the model; and secondly, actually measured tide level data of at least one sampling point in the near-shore shallow water area of the engineering area, which changes along with time, is used for verifying the accuracy of calculating the tide level. The time period of the tidal table data is to encompass the time period of the measured tide level data.
(4) Trend data
The power flow data comprises: actually measured tide data of at least one point position of the near-shore shallow water area of the engineering area, which changes along with time, comprises flow speed and flow direction and is used for verifying and calculating the accuracy of tide.
(5) Silt data
The silt data includes: the flow of the overflow port of the cabin, the particle size of overflow silt, the concentration of the silt and the sedimentation velocity of the silt. The sedimentation velocity of the silt is calculated by adopting a Stokes formula according to the particle size of the silt, and can also be determined by a sedimentation experiment.
(6) Dredger operating parameters
The dredger operating parameters include: construction track of dredger and construction time of loading overflow.
Step two: tidal current model building and rating
And (3) building a power flow model by using hydrodynamic numerical simulation software, wherein the available hydrodynamic simulation software comprises MIKE21/3, Deflt3D, SMS, FVOM and the like. The method mainly comprises the following steps: (1) making a terrain grid file required by calculation according to underwater terrain data; (2) importing a terrain grid file, wind field data and astronomical tide level data of a tide table at an open boundary into simulation software as an input file (without tide), and setting related parameters (time step length, simulation time, bottom friction resistance, vortex viscosity coefficient and dry-wet boundary); (3) running the model, and storing the operation result (the tidal level of the sampling point, the flow speed and the flow direction of the tidal current, and the area of the computational grid); (4) comparing the tide level, the flow velocity and the flow direction of the sampling point obtained by model calculation with the actually measured tide level, the flow velocity and the flow direction of the tide of the sampling point respectively (comparing the tide level obtained by model calculation with the actually measured tide level, comparing the flow velocity obtained by model calculation with the actually measured flow velocity, and comparing the flow direction obtained by model calculation with the actually measured flow direction); (5) a calibration model: adjusting model parameters according to a comparison result of the actual measurement data of the sampling point and the simulation data obtained by model calculation, recalculating the model, and comparing the actual measurement data with the simulation data; (6) and (5) repeating the step until the error of the simulation data and the actual measurement data meets the precision requirement in the technical specification of the water transport engineering simulation test (JTS/T231-2021) specification, and considering that the tidal current model is well built.
Step three: reduction of overflow silt concentration
The concentration of the overflowing silt is not always stable during the loading and overflowing construction. The mud inlet is generally in cabin lower part, and the overflow mouth is generally in upper portion, and when the vanning began, the overflow mouth did not have silt to spill over, and when having silt to spill over, the concentration of silt also slowly increased until the concentration is stable. The silt concentration is monitored when the overflow concentration of the silt at the overflow port is stable, and the silt concentration can be monitored once when the loading of the tank is finished. The direct calculation of the overflow silt concentration with the stable concentration would result in large data, and therefore the overflow silt concentration needs to be reduced.
And calculating the silt concentration of the overflow port under different loading conditions by using a numerical simulation technology, and identifying influence factors influencing the unstable process time of the silt concentration of the overflow port, wherein the influence factors are mainly the volume and the particle size of the silt in the cabin. The volume of the cabin determines the stable time of the movement of the water body and the sediment in the cabin, the larger the volume of the cabin is, the longer the movement of the water body and the sediment in the cabin needs to reach the stability, and the longer the unstable time of the sediment concentration at the overflow port is; the shorter the reverse.
The larger the sediment particle size is, the faster the sedimentation speed is, and the shorter the unstable time of the sediment concentration at the overflow port is; the longer the reverse.
The hold overflow construction time also affects the reduction factor. The silt concentration of the overflow port gradually increases to be stable, so the construction time of loading and overflowing comprises the unstable time and stable time of overflowing. The longer the construction time of the loading overflow is, the smaller the proportion of the unstable process time in the loading overflow construction time is, and the smaller the reduction coefficient is; the larger the opposite.
Through a large number of numerical simulation calculations, the concentration reduction coefficient of overflow sediment under different hold overflow construction times is summarized, the reduction coefficient caused by the hold volume is set as Cv, and the reduction coefficient caused by the sediment particle size is set as Cs. The converted overflow sediment concentration is the stable concentration multiplied by the reduction coefficients Cv and Cs.
Step four: overflow sediment movement model building
And building an overflow sediment movement model based on the calculated power flow model. The overflow sediment of the dredger is set as a mobile point source, the motion track of the point source is set according to the construction track (time, X and Y coordinates) of the dredger, and the parameters of the mobile point source comprise the flow of an overflow port of a cabin and the concentration of the overflow sediment after reduction. And inputting the sediment settling velocity into the overflow sediment model. The operation results stored by the model comprise bottom bed sediment thickness change, unit area bottom bed sediment mass change and suspended sediment concentration. And outputting the area of each computational grid by the power flow model, and multiplying the mass change of the sediment on the bottom bed of the unit area on the computational grid by the area of a certain computational grid to obtain the sedimentation amount of the overflow sediment on the bottom bed of the computational grid. And (4) counting the sum of the overflow sediment settlement of all grids on the channel to obtain the sediment amount of the overflow sediment settled in the channel range. Multiplying the reduced overflow sediment concentration by the overflow construction time to obtain the total amount of the overflow sediment of the dredger; and subtracting the overflow sediment settlement in the range of the channel from the total overflow sediment amount to obtain the overflow sediment amount outside the channel, namely the overflow sediment loss amount.
Step five: overflow simulation and fluid loss calculation for different time periods
The fluctuation tide of tide can cause the change of the flow velocity and the flow direction of tide, and further cause the change of the drift track of overflow sediment and the position of a sinking bed. When the tide is rising, the tide moves towards the shore, when the tide is falling, the tide moves off the shore, and the flow direction is changed when the tide is calm and stops. The rising tide and the falling tide generally take 5 to 6 hours, and the cabin filling and overflowing construction process takes dozens of minutes. If the loading overflow construction occurs in the flood tide process, the silt can flow to the bank; during the falling tide, the silt will flow off the shore; when the tide is calmed and stopped, the overflow silt in the sea water can also turn along with the tide.
At least selecting one time period of flood tide, ebb tide and open tide (or ebb tide), calculating the loss of one-time cabin-filling overflow construction, and then averaging the results for a plurality of times (at least three times) (in the course of excavating the airway, as long as the weather conditions allow continuous construction operation, the flood tide, ebb tide and open tide are inevitable, and the loss of one-time cabin-filling overflow construction is almost impossible to construct only in the flood tide (or ebb tide and open tide) time period). After the construction is finished, the recorded times of the loading overflow construction operation of the dredger are multiplied by the single loss amount, so that the total loading overflow construction loss amount in the construction period can be obtained.
Example 2
The calculation method of the invention is illustrated by taking calculation of the overflow construction loss of the drag suction ship loading cabin in 10-ten-thousand-ton channel engineering in Rongxing harbor areas of Panjin harbors as an example. The software used was MIKE3 hydrodynamic simulation software.
The method comprises the following steps: basic data gathering
Wind: obtained from the NCEP wind field model.
Topography: the model range comprises the whole Bohai Bay, and the underwater topography of the Bohai Bay is obtained from a chart; the underwater topographic data around the engineering area and near shore comes from high-precision actual measurement CAD data.
Tide level: the tidal current edge is defined in a deep sea water area where the water depth changes uniformly, and forecast tidal data are adopted; and the actually measured tide level data of a certain point position near the shore is used for tide level verification.
Tidal current: and the actually measured tide level data of a certain point position near the shore is used for verifying the flow velocity and the flow direction of the tide.
Silt: the flow of the overflow port of the cabin is 7.5m 3 (s) the concentration of silt after overflow stabilization is 1.1kg/m 3 . The silt is fine silt, and the particle size of the silt is not more than 0.01 mm.
Dredger operation parameters: overflowing after 20min after the dredger is harrowed down and pumps are started, and turning around after about thirty minutes; and (5) completing the loading after 50 min.
Step two: tidal current model building and rating
The power flow model is built by adopting an MIKE3 HD module. The model range comprises the whole Bohai Bay, a Bohai Bay terrain grid is generated according to a chart and actually-measured bottom elevation data, and a tide boundary is arranged in a deep water area with a gentle terrain in the southeast east. And inputting data such as wind, boundary position and the like into the model, and storing tide level and tide flow data of the whole calculation domain. And (3) operating the model, extracting tide level, flow velocity and flow direction data at the actual measurement point position, comparing the tide level, flow velocity and flow direction data with the actual measurement data, adjusting model parameters (bottom friction resistance, vortex viscosity and the like) according to the comparison result, re-operating the model, comparing the new calculation result with the actual measurement data, adjusting the parameters and operating the model until the error of the simulation data and the actual measurement data meets the precision requirement in the technical Specification for simulation test of water transportation engineering (JTS/T231-2021).
Step three: reduction of overflow silt concentration
The flow of the overflow port of the cabin is 7.5m 3 (s) the concentration of silt after overflow stabilization is 1.1kg/m 3 The reduction coefficient Cs is 0.9, Cv is 0.85, and the overflow sediment concentration input by the model is as follows: 0.9 × 0.85 × 1.1=0.8415 kg/m 3 。
Step four: overflow sediment movement model building
The overflow sediment movement model is built by adopting an MIKE3 MT module. And building an overflow sediment movement model based on the calculated power flow model. The overflow silt of the dredger is set to be a movable point source, the movement track is set according to the construction track of the dredger, and the parameters of the movable point source comprise the flow of an overflow port of a cabin and the concentration of the overflow silt after reduction. Another important input parameter of the overflow sediment model is sediment settling velocity, the overflow sediment is fine silt with the particle size not exceeding 0.01mm, and the sediment settling velocity is calculated to be 0.00009m/s according to the Stokes formula. The operation results stored by the model comprise bottom bed sediment thickness change, unit area bottom bed sediment mass change and suspended sediment concentration.
Step five: overflow simulation and overflow calculation for different time periods
The construction time of the loading overflow is 30 minutes, and the silt overflow diffusion range can be different due to different water flow directions during construction in the rising tide period and the falling tide period. Therefore, this example calculates the sand overflow during construction in the period of alternating (open tide) of flood tide, ebb tide and flood tide.
And (3) damping: 23:45 No. 4/22 to 23 No. 4/01: 15
Rising tide: no. 16:45 of No. 22 month 4 to No. 22 month 4 and No. 17:15
Leveling: no. 20:15 No. 22 month 4-No. 20:45 No. 22 month 4
Table 1 shows the total amount of overflow silt and the amount of sediment inside and outside the track for a dredger during construction at different times. The overflow capacity of the outlet is 7.5m 3 The overflow time is 1800s, and the concentration of the stabilized overflow port is 1.1kg/m 3 Cs is 0.9, Cv is 0.85, and the total overflow sediment weight of the cabin is as follows: 0.9 × 0.85 × 1.1 × 7.5 × 1800 =11360 kg.
The movement of suspended silt is influenced by the flow velocity and the flow direction of water flow, the flow velocity is large when tide rises, the movement of silt is fast, the amount of silt drifting out of a channel is maximum, and the amount of silt deposited in the channel is minimum. In general, the amount of sediment deposited in the channel is 1/20-1/25 of the total overflow sediment amount.
TABLE 1 calculation results of silt overflow in different construction periods
The single-cabin-loading overflow construction loss m is the average value of the overflow silt quantity of the channel, namely:
m=(10648.62+10904.14+10765.35)/ 3=10772.7kg
assuming that the number of times of loading and overflowing construction of the dredger in the construction period is n, the total loading and overflowing construction loss M is as follows:
M=m×n
example 3
A system for determining a load overflow construction loss, comprising:
a data collection module: collecting basic data;
a power flow model building module: according to the basic data of the first step, adopting hydrodynamic force numerical simulation software to build a power flow model, wherein the power flow model range comprises: shoreside-channel engineering area-outer sea deepwater area, wherein the outer sea deepwater area is used as an open boundary of the model;
a calculation module: calculating the converted overflow sediment concentration: the converted overflow sediment concentration is the monitored stable sediment concentration multiplied by a reduction coefficient Cv and Cs, wherein Cv is the reduction coefficient caused by the cabin volume, Cv is 0.8-1, and Cs is the reduction coefficient caused by the sediment particle size; cs is 0.8-1;
the overflow sediment movement model building module: building an overflow sediment movement model according to the power flow model obtained in the second step, setting overflow sediment as a moving point source, setting the movement track of the moving point source according to the construction track of the dredger, inputting sediment sedimentation speed into the overflow sediment model, and obtaining overflow sediment sedimentation in the range of the sea bed upper airway after the model is operated, wherein the parameters of the moving point source comprise the flow of the cabin overflow port and the concentration of the overflow sediment obtained in the third step; multiplying the overflow sediment concentration obtained in the step three by the overflow construction time to obtain the total amount of the overflow sediment of the dredger; subtracting the overflow sediment settling amount in the range of the channel on the seabed from the total overflow sediment amount to obtain the overflow sediment amount outside the channel, namely the overflow sediment loss amount;
a result analysis module: overflow simulation and loss of flow calculation for different periods of time: selecting a time period of rising tide, falling tide, leveling tide or stopping tide, calculating the loss amount of the once overflowing silt, and then calculating the average value of at least three results to be used as the loss amount of the once cabin-filling overflowing construction; and multiplying the recorded times of the loading overflow construction operation of the dredger by the single loading overflow construction loss to obtain the total loading overflow construction loss during construction.
Example 4
An information data processing terminal is used for realizing the calculation method of the loading overflow construction loss.
Example 5
A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of calculating a load lock overflow construction loss as described above.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When used in whole or in part, can be implemented in a computer program product that includes one or more computer instructions. When loaded or executed on a computer, cause the flow or functions according to embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.)). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (ssd)), among others.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A method for calculating the loss of the cabin overflow construction is characterized by comprising the following steps:
the method comprises the following steps: collecting basic data;
step two: building a power flow model: according to the basic data of the first step, adopting hydrodynamic force numerical simulation software to build a power flow model, wherein the power flow model range comprises: shoreside-channel engineering area-outer sea deepwater area, wherein the outer sea deepwater area is used as an open boundary of the model;
step three: calculating the converted overflow sediment concentration: the converted overflow sediment concentration is the monitored stable sediment concentration multiplied by a reduction coefficient Cv and Cs, wherein Cv is the reduction coefficient caused by the cabin volume, Cv is 0.8-1, and Cs is the reduction coefficient caused by the sediment particle size; cs is 0.8-1;
step four: building an overflow sediment movement model: building an overflow sediment movement model according to the power flow model obtained in the second step, setting overflow sediment as a moving point source, setting the movement track of the moving point source according to the construction track of the dredger, inputting sediment sedimentation speed into the overflow sediment model, and obtaining overflow sediment sedimentation in the range of the sea bed upper airway after the model is operated, wherein the parameters of the moving point source comprise the flow of the cabin overflow port and the concentration of the overflow sediment obtained in the third step; multiplying the overflow sediment concentration obtained in the step three by the overflow construction time to obtain the total amount of the overflow sediment of the dredger; subtracting the overflow sediment settling amount in the range of the channel on the seabed from the total overflow sediment amount to obtain the overflow sediment amount outside the channel, namely the overflow sediment loss amount;
step five: overflow simulation and loss of flow calculation for different periods of time: selecting a time period of rising tide, falling tide, leveling tide or stopping tide, calculating the loss amount of the once overflowing silt, and then calculating the average value of at least three results to be used as the loss amount of the once cabin-filling overflowing construction; and multiplying the recorded times of the loading overflow construction operation of the dredger by the single loading overflow construction loss to obtain the total loading overflow construction loss during construction.
2. The method for calculating the loss of the cabin overflow construction of claim 1, wherein the basic data in the first step comprises meteorological data, topographic data, tide level data, tide data, silt data, and operating parameters of a dredger:
weather data: the meteorological data comprise wind field data, and a wind speed and wind direction time sequence in a time period is calculated;
topographic data: the terrain data comprises underwater terrain of a deep water area and underwater terrain data of a shallow water area near the shore of an engineering area;
tide level data: the tide level data comprise tide surface astronomical tide level data of a model open boundary position changing along with time and actually measured tide level data of at least one sampling point in a near-shore shallow water area of the engineering area changing along with time;
trend data: the power flow data comprises actually measured power flow data of at least one point position of the near-shore shallow water area of the engineering area along with time variation;
silt data: the silt data includes: the flow of an overflow port of the cabin, the particle size of overflow sediment, the concentration of the sediment and the sedimentation speed of the sediment;
dredger operation parameters: the dredger operation parameters comprise construction track of the dredger and loading overflow construction time.
3. The method for calculating the loss of the cabin overflow construction according to claim 2, wherein the second step comprises the following steps:
s1, making a terrain mesh file required by calculation according to the terrain data;
s2, importing the terrain grid file obtained in the S1, the wind field data and the astronomical tide level data of the tide table at the open boundary position of the model as input files into simulation software, and setting time step length, simulation time, bottom friction resistance, vortex viscosity coefficient and dry-wet boundary parameters;
s3, operating the model, storing the tidal level of the sampling point, the flow velocity and the flow direction of the tidal current, and calculating the operation result of the grid area;
s4, respectively comparing the tide level, the flow speed and the flow direction of the sampling point obtained in the step S3 with the actually measured tide level data and the actually measured flow data of at least one sampling point in the near-shore shallow water zone of the engineering zone along with the time change in the step I, namely comparing the tide level obtained by model calculation with the actually measured tide level, comparing the flow speed obtained by model calculation with the actually measured flow speed, and comparing the flow direction obtained by model calculation with the actually measured flow direction;
s5, rating the model: adjusting the model parameters according to the comparison result of S4, recalculating the model and comparing the measured data with the simulated data;
s6, repeating the step S5 until the error of the simulated data and the measured data meets the precision requirement in the specification.
4. The method for calculating the loss of the cabin overflow construction according to claim 3, wherein the open edge of the tidal current model is defined at a place where the underwater bottom elevation gradient is less than 1:1000 and the water depth exceeds 20 m.
5. The method for calculating the loss of the loading overflow construction according to claim 1, wherein in the third step:
factors affecting Cs include silt particle size and hold time:
for the silt with the grain diameter of 0.05-0.005mm, when the loading time is less than 1 hour, the Cs is 0.8-0.85, when the loading time is 1-2 hours, the Cs is 0.85-0.9, when the loading time is 2-3 hours, the Cs is 0.9-0.93, when the loading time is more than 3 hours, the Cs is 0.93-1;
for the superfine sand with the grain diameter of 0.1-0.05mm, when the capsule loading time is less than 1 hour, the Cs is 0.85-0.9, when the capsule loading time is 1-2 hours, the Cs is 0.9-0.93, when the capsule loading time is 2-3 hours, the Cs is 0.93-0.95, and when the capsule loading time is more than 3 hours, the Cs is 0.95-1;
for fine sand with the grain diameter of 0.25-0.1mm, when the cabin loading time is less than 1 hour, the Cs is 0.9-0.93, when the cabin loading time is 1-2 hours, the Cs is 0.93-0.95, when the cabin loading time is 2-3 hours, the Cs is 0.95-0.97, when the cabin loading time is more than 3 hours, the Cs is 0.97-1;
for the medium sand with the grain diameter of 0.5-0.25mm, when the hold time is less than 1 hour, the Cs is 0.93-0.95, when the hold time is 1-2 hours, the Cs is 0.95-0.97, when the hold time is 2-3 hours, the Cs is 0.97-0.98, when the hold time is more than 3 hours, the Cs is 0.98-1;
for coarse sand with the particle size of 2-0.5mm, when the hold time is less than 1 hour, Cs is 0.95-0.97, when the hold time is 1-2 hours, Cs is 0.97-0.98, when the hold time is 2-3 hours, Cs is 0.98-0.99, when the hold time is more than 3 hours, Cs is 0.99-1;
factors affecting Cv include cabin volume and stowage time:
cabin volume 20000m 3 When the loading time is less than 1 hour, Cv is 0.8-0.85, when the loading time is 1-2 hours, Cv is 0.85-0.92, when the loading time is 2-3 hours, Cv is 0.92-0.95, and when the loading time is more than 3 hours, Cv is 0.95-0.99;
cabin volume 10000~20000m 3 When the loading time is less than 1 hour, the Cv is 0.85-0.88, when the loading time is 1-2 hours, the Cv is 0.88-0.94, when the loading time is 2-3 hours, the Cv is 0.94-0.96, when the loading time is more than 3 hours, the Cv is 0.96-0.99;
the volume of the cabin ranges from 6000m to 10000m 3 When the loading time is less than 1 hour, Cv is 0.86-0.9, when the loading time is 1-2 hours, Cv is 0.9-0.95, when the loading time is 2-3 hours, Cv is 0.95-0.97, when the loading time is more than 3 hours, Cv is 0.97-1;
cabin volume 6000m 3 When the loading time is less than 1 hour, Cv is 0.88-0.92, when the loading time is 1-2 hours, Cv is 0.92-0.96, when the loading time is 2-3 hours, Cv is 0.96-0.98, and when the loading time is more than 3 hours, Cv is 0.98-1.
6. The utility model provides a system for confirming of loading overflow construction loss, its characterized in that: the system for determining the loading overflow construction loss is used for realizing the method for calculating the loading overflow construction loss according to any one of claims 1 to 5, and further comprises:
a data collection module: collecting basic data;
a power flow model building module: according to the basic data of the first step, adopting hydrodynamic force numerical simulation software to build a power flow model, wherein the power flow model range comprises: shoreside-channel engineering area-open sea deepwater area, wherein the open sea deepwater area is used as an open boundary of the model;
a calculation module: calculating the converted overflow sediment concentration: the converted overflow sediment concentration is the monitored stable sediment concentration multiplied by a reduction coefficient Cv and Cs, wherein Cv is the reduction coefficient caused by the cabin volume, Cv is 0.8-1, and Cs is the reduction coefficient caused by the sediment particle size; cs is 0.8-1;
the overflow sediment movement model building module: building an overflow sediment movement model according to the power flow model obtained in the second step, setting overflow sediment as a moving point source, setting the movement track of the moving point source according to the construction track of the dredger, inputting sediment settling speed into the overflow sediment model, and obtaining overflow sediment settlement in the range of the sea bed airway after the model is operated, wherein the parameters of the moving point source comprise the flow of an overflow port of the cabin and the concentration of the overflow sediment obtained in the third step; multiplying the overflow sediment concentration obtained in the step three by the overflow construction time to obtain the total amount of the overflow sediment of the dredger; subtracting the overflow sediment settling amount in the range of the channel on the seabed from the total overflow sediment amount to obtain the overflow sediment amount outside the channel, namely the overflow sediment loss amount;
a result analysis module: overflow simulation and loss calculation for different periods of time: selecting a time period of rising tide, falling tide, leveling tide or stopping tide, calculating the loss amount of the once overflowing silt, and then calculating the average value of at least three results to be used as the loss amount of the once cabin-filling overflowing construction; and multiplying the recorded times of the loading overflow construction operation of the dredger by the single loading overflow construction loss to obtain the total loading overflow construction loss during construction.
7. The system for determining the hold overflow construction loss according to claim 6, wherein the basic data includes meteorological data, topographic data, tide level data, tidal data, silt data, and dredge boat operational parameters:
weather data: the meteorological data comprise wind field data, and a wind speed and wind direction time sequence in a time period is calculated;
topographic data: the terrain data comprise underwater terrain of a deep water area and underwater terrain data of a shallow water area close to the shore of an engineering area;
tide level data: the tide level data comprise tide surface astronomical tide level data of a model open boundary position changing along with time and actually measured tide level data of at least one sampling point in a near-shore shallow water area of the engineering area changing along with time;
trend data: the power flow data comprises actually measured power flow data of at least one point position of the near-shore shallow water area of the engineering area along with time variation;
silt data: the silt data includes: the flow of an overflow port of the cabin, the particle size of overflow sediment, the concentration of the sediment and the sedimentation speed of the sediment;
dredger operation parameters: the dredger operation parameters comprise construction track of the dredger and loading overflow construction time.
8. The system for determining the loading overflow construction loss according to claim 6, wherein the specific action steps of the power flow model building module are as follows:
s1, making a terrain mesh file required by calculation according to the terrain data;
s2, importing the terrain grid file obtained in the S1, the wind field data and the astronomical tide level data of the tide table at the open boundary position of the model as input files into simulation software, and setting time step length, simulation time, bottom friction resistance, vortex viscosity coefficient and dry-wet boundary parameters;
s3, operating the model, storing the tidal level of the sampling point, the flow velocity and the flow direction of the tidal current, and calculating the operation result of the grid area;
s4, respectively comparing the tide level, the flow speed and the flow direction of the sampling point obtained in the step S3 with actually measured tide level data and actually measured tide data of at least one sampling point in the near-shore shallow water area of the engineering area in the step I, namely comparing the tide level obtained by model calculation with the actually measured tide level, comparing the flow speed obtained by the model calculation with the actually measured flow speed, and comparing the flow direction obtained by the model calculation with the actually measured flow direction;
s5, rating the model: adjusting the model parameters according to the comparison result of S4, recalculating the model and comparing the measured data with the simulated data;
s6, repeating the step S5 until the error of the simulated data and the measured data meets the precision requirement in the specification.
9. An information data processing terminal, characterized by being used for realizing the calculation method of the loading overflow construction loss amount of any one of claims 1 to 5.
10. A computer-readable storage medium characterized by: comprising instructions which, when run on a computer, cause the computer to carry out the method of calculating the load overflow construction loss according to any one of claims 1 to 5.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004244947A (en) * | 2003-02-14 | 2004-09-02 | Sabo Jisuberi Gijutsu Center | Flooding analyzing system of sediment disaster |
| JP2006330884A (en) * | 2005-05-24 | 2006-12-07 | Chugoku Electric Power Co Inc:The | Tide prediction system |
| CN107798176A (en) * | 2017-10-12 | 2018-03-13 | 交通运输部天津水运工程科学研究所 | A kind of adaptive sediment movement method for numerical simulation of high-concentration and low-concentration |
| CN107895059A (en) * | 2017-09-18 | 2018-04-10 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of silt coast high concentrtion sea area islands and reefs promote silt engineering simulation method |
| CN108256137A (en) * | 2017-09-18 | 2018-07-06 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of Macro-tidal estuary gulf man-made island operation area basin sedimentation in channel analogy method |
| CN108629055A (en) * | 2017-03-16 | 2018-10-09 | 中交上海航道勘察设计研究院有限公司 | A kind of sandy cruiseway silt amount forecasting procedure based on saturation sediment transport principle |
| WO2020229866A1 (en) * | 2019-05-10 | 2020-11-19 | Total Se | Method for modelling the formation of a sedimentary area by simulating tidal current-induced particle transport |
| CN113887087A (en) * | 2021-11-02 | 2022-01-04 | 交通运输部天津水运工程科学研究所 | Method and system for calculating channel sediment deposition caused by sediment transport in tidal river section |
| WO2022036752A1 (en) * | 2020-08-18 | 2022-02-24 | 中国能源建设集团江苏省电力设计院有限公司 | Current design flow rate-based seabed foundation local scour depth determination method and system |
| CN114266205A (en) * | 2021-12-24 | 2022-04-01 | 河海大学 | Estuary water channel water and sand movement experiment simulation and measurement system |
-
2022
- 2022-08-31 CN CN202211050197.0A patent/CN115114809B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004244947A (en) * | 2003-02-14 | 2004-09-02 | Sabo Jisuberi Gijutsu Center | Flooding analyzing system of sediment disaster |
| JP2006330884A (en) * | 2005-05-24 | 2006-12-07 | Chugoku Electric Power Co Inc:The | Tide prediction system |
| CN108629055A (en) * | 2017-03-16 | 2018-10-09 | 中交上海航道勘察设计研究院有限公司 | A kind of sandy cruiseway silt amount forecasting procedure based on saturation sediment transport principle |
| CN107895059A (en) * | 2017-09-18 | 2018-04-10 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of silt coast high concentrtion sea area islands and reefs promote silt engineering simulation method |
| CN108256137A (en) * | 2017-09-18 | 2018-07-06 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of Macro-tidal estuary gulf man-made island operation area basin sedimentation in channel analogy method |
| CN107798176A (en) * | 2017-10-12 | 2018-03-13 | 交通运输部天津水运工程科学研究所 | A kind of adaptive sediment movement method for numerical simulation of high-concentration and low-concentration |
| WO2020229866A1 (en) * | 2019-05-10 | 2020-11-19 | Total Se | Method for modelling the formation of a sedimentary area by simulating tidal current-induced particle transport |
| WO2022036752A1 (en) * | 2020-08-18 | 2022-02-24 | 中国能源建设集团江苏省电力设计院有限公司 | Current design flow rate-based seabed foundation local scour depth determination method and system |
| CN113887087A (en) * | 2021-11-02 | 2022-01-04 | 交通运输部天津水运工程科学研究所 | Method and system for calculating channel sediment deposition caused by sediment transport in tidal river section |
| CN114266205A (en) * | 2021-12-24 | 2022-04-01 | 河海大学 | Estuary water channel water and sand movement experiment simulation and measurement system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116821564A (en) * | 2023-08-28 | 2023-09-29 | 中建八局第三建设有限公司 | Additive quality calculating system, method and storage medium for desertification treatment of ponding area |
| CN116821564B (en) * | 2023-08-28 | 2024-01-09 | 中建八局第三建设有限公司 | Additive quality calculating system, method and storage medium for desertification treatment of ponding area |
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