BIM model-based hydraulic reclamation foundation slope foundation trench excavation engineering quantity evaluation system

Abstract

The invention relates to the field of slope foundation trench excavation, is used for solving the problem that a square grid method has a large error in earthwork excavation amount evaluation of a complex terrain, and particularly relates to a BIM model-based hydraulic reclamation foundation slope foundation trench excavation engineering amount evaluation system. Comprising a scanning generation unit, an elevation analysis unit, an engineering quantity calculation unit, a grid adjustment unit and a result output unit. According to the method, when the earthwork excavation volume is estimated, modeling analysis is carried out on the seabed surface and the excavation position on the basis of the scanned and measured seabed surface through the BIM technology, so that the earthwork volume needing to be excavated is obtained, estimation of the earthwork excavation volume is achieved, and meanwhile, when the earthwork excavation volume is estimated, the earthwork excavation volume is accurately estimated. Different sizes of the square grids are determined according to different flatness degrees of the seabed surface, so that the sizes of the square grids can actively adapt to the flatness degree of the sea level, the convenience of square grid earthwork volume evaluation is ensured, and the accuracy degree of earthwork excavation volume estimation under the complex terrain is improved.

Description

Technical Field

[0001] The invention relates to the field of slope foundation trench excavation, and in particular to a BIM model-based dredger fill foundation slope foundation trench excavation engineering quantity assessment system. Background Art

[0002] In engineering, multi-beam bathymetry systems are often used to measure the seabed topography, and then the grid method, geometric surface method, cross-section method, etc. are used to calculate the earthwork volume of dredging projects. The grid method is suitable for earthwork calculations in large areas of relatively flat sites. This method is intuitive, easy to understand, and simple to calculate. The site is divided into several square grids, and the elevations of the four corner points of each grid are measured or interpolated in the site. The earthwork of each grid surface is calculated, and the sum of the earthwork volume of each grid is the total earthwork volume. However, the integrity of the intermediate data is poor, and the workload is large for complex terrains, and the accuracy is low;

[0003] At present, the existing patent CN113256809A discloses a technical solution, which detects the seabed before dredging and simulates the seabed after dredging, and superimposes the seabed images obtained twice, so as to estimate the earthwork excavation volume according to the volume difference. Although this solution improves the accuracy of earthwork excavation estimation under complex terrain compared with the grid method, this method is very dependent on the simulation accuracy of the seabed image after dredging. It has good estimation accuracy for simple earthwork excavation, but for more complex excavation situations, there will be large calculation errors, which will affect the estimation effect of earthwork excavation volume. Therefore, the traditional grid method is improved by BIM technology, which can more accurately evaluate the earthwork volume without over-reliance on the estimation accuracy of the model when the construction is completed.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] When estimating the earthwork excavation volume, the present invention uses the scanned seabed surface as a basis, and models and analyzes the seabed surface and excavation position through BIM technology, so as to obtain the required earthwork excavation volume and realize the estimation of the earthwork excavation volume. At the same time, when estimating the earthwork excavation volume, different grid sizes are determined according to the different flatness of the seabed surface, so that the size of the grid can actively adapt to the flatness of the sea level, which not only ensures the convenience of grid earthwork volume assessment, but also improves the accuracy of earthwork excavation volume estimation under complex terrain, solves the problem of large errors in the grid method for excavation volume assessment of complex terrain, and proposes a hydraulic fill foundation slope foundation trench excavation engineering volume assessment system based on BIM model.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A BIM-based hydraulic fill foundation slope foundation trench excavation engineering quantity assessment system includes a scanning generation unit, the scanning generation unit is used to scan the seabed plane and generate a seabed map before dredging according to the scanning results;

[0008] an elevation analysis unit, wherein the elevation analysis unit obtains a seabed map before dredging, performs elevation analysis on the seabed map before dredging, and generates a seabed flatness coefficient according to the elevation analysis result;

[0009] An engineering quantity calculation unit, wherein the engineering quantity calculation unit performs a slope processing on the seabed map before dredging according to the set slope edge and slope, obtains a foundation trench model after the construction is completed through the slope processing, performs a grid processing on the foundation trench model, obtains the number of excavation grids, and evaluates the excavation volume through the number of grids;

[0010] A grid adjustment unit, wherein the grid adjustment unit obtains a seabed flatness coefficient and adjusts the grid volume according to the seabed flatness coefficient. The grid adjustment unit can also obtain the number of excavated grids and perform analysis through the excavated grids, thereby adjusting the single grid volume again;

[0011] A result output unit is used to obtain the excavation quantity and output the excavation quantity.

[0012] As a preferred embodiment of the present invention, when scanning the seabed plane, the scanning generation unit detects echoes of the seabed plane by sonar or radar, and constructs a three-dimensional model by a machine binocular vision algorithm;

[0013] The two sets of sonar or radar are located on the same sea level, and the line between the two sets of sonar or radar is perpendicular to the scanning direction.

[0014] As a preferred embodiment of the present invention, the elevation analysis unit sets a plurality of points distributed in a matrix in the seabed map before dredging, and obtains the height coordinate corresponding to each point;

[0015] The elevation analysis unit calculates the difference of the height coordinates of all points in the matrix with adjacent points by traversal method, obtains multiple groups of elevation differences, and performs arithmetic averaging on all elevation differences to obtain an average elevation difference.

[0016] As a preferred embodiment of the present invention, the elevation analysis unit obtains the maximum value Hmax and the minimum value Hmin in the plurality of elevation differences, and the elevation analysis unit calculates the maximum value and the minimum value in the elevation difference according to a preset ratio to obtain a large difference range a×Hmax~Hmax, where a<1, and obtains a small difference range Hmin~b×Hmin, where b>1, and a×Hmax>b×Hmin;

[0017] The elevation analysis unit classifies all elevation differences into large elevation difference and small elevation difference according to a large difference range and a small difference range. If the elevation difference is not within the large difference range and the small difference range at the same time, it is recorded as a medium elevation difference.

[0018] The elevation analysis unit calculates the proportion of large elevation difference, medium elevation difference and small elevation difference respectively, and generates the seabed flatness coefficient FL through formula analysis. Among them, A is the proportion of large elevation differences, B is the proportion of medium elevation differences, C is the proportion of small elevation differences, and P is the average elevation difference.

[0019] As a preferred embodiment of the present invention, the grid adjustment unit calculates the ratio of the seabed flatness coefficient FL and the set flatness coefficient threshold to obtain the flatness ratio. The grid adjustment unit obtains the preset initial grid size, and multiplies the flatness ratio by the initial grid to obtain the adjusted grid volume, and sends the adjusted grid volume to the engineering quantity calculation unit.

[0020] As a preferred embodiment of the present invention, the engineering quantity calculation unit specifies the slope edge and slope slope through the Civil3D slope tool and generates a foundation pit model. The engineering quantity calculation unit grids the foundation pit model and calculates according to the grids occupied by the foundation pit model and the volume of each grid to obtain the excavation volume of the foundation pit model.

[0021] As a preferred embodiment of the present invention, the engineering quantity calculation unit selects all grids located at the edge of the foundation groove model and marks them as edge grids, and records the grids that are not at the edge as center grids. The engineering quantity calculation unit calculates the ratio of the number of edge grids to the number of center grids to obtain the edge ratio, and compares the edge ratio with a preset ratio threshold to generate an edge excess signal or an edge normal signal;

[0022] After generating the edge normal signal, the engineering quantity calculation unit sends the excavation amount of the foundation trench model to the result output unit, and the result output unit outputs the excavation amount of the foundation trench model.

[0023] As a preferred implementation of the present invention, the engineering quantity calculation unit sends the edge excess signal and the edge ratio to the grid adjustment unit, and the grid adjustment unit reduces the grid volume. The method for reducing the grid volume is:

[0024] The grid adjustment unit calculates the difference between the edge ratio and the preset ratio threshold to obtain the edge ratio deviation, and then calculates the ratio between the edge ratio deviation and the edge ratio, and records it as the adjustment ratio. The grid adjustment unit adjusts the current grid volume according to the adjustment ratio to obtain the adjusted grid volume V, V=V0*(1-B), where V0 is the current grid volume and B is the adjustment ratio;

[0025] The grid adjustment unit sends the adjusted grid volume to the engineering quantity calculation unit, which recalculates the excavation volume of the foundation pit model based on the adjusted grid volume and sends the excavation volume of the foundation pit model to the result output unit, which outputs the excavation volume of the foundation pit model.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. In the present invention, when estimating the earthwork excavation volume, the scanned seabed surface is used as the basis, and the seabed surface and the excavation position are modeled and analyzed through BIM technology, so as to obtain the required earthwork excavation volume and realize the estimation of the earthwork excavation volume. At the same time, when estimating the earthwork excavation volume, the flatness of the seabed surface is analyzed in advance, and the sizes of different grids are determined according to the different flatness of the seabed surface, so that the size of the grid can actively adapt to the flatness of the sea level, which not only ensures the convenience of grid earthwork volume evaluation, but also improves the accuracy of earthwork excavation volume estimation under complex terrain.

[0028] 2. In the present invention, when analyzing the flatness of the seabed, the height change data of adjacent positions of the seabed are analyzed to obtain the average height change of the seabed. The data between all control points on the seabed are classified and analyzed to obtain the distribution of height changes on the seabed, thereby more accurately analyzing the flatness of the seabed and providing a basis for subsequent accurate estimation of the excavation volume of the seabed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0030] Figure 1 is a system block diagram of the present invention;

[0031] Figure 2 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] See also Figure 1 - Figure 2 As shown, a hydraulic fill foundation slope foundation trench excavation engineering quantity assessment system based on a BIM model includes a scanning generation unit, an elevation analysis unit, an engineering quantity calculation unit, a grid adjustment unit and a result output unit. When the scanning generation unit scans the seabed plane, the seabed plane is echo-detected by sonar or radar. Two sets of sonars or radars perform synchronous detection above the seabed. The two sets of sonars or radars are located on the same sea level, and the line between the two sets of sonars or radars is perpendicular to the scanning direction.

[0035] The scanning generation unit constructs a three-dimensional model using the machine binocular vision algorithm based on the images sent back by the two sets of sonars or radars to generate a map of the seabed before dredging.

[0036] Embodiment 2:

[0037] See also Figure 1 - Figure 2 As shown, after the elevation analysis unit obtains the seabed map before dredging, a plurality of points distributed in a matrix are set in the seabed map before dredging, and the height coordinates corresponding to each point are obtained. The elevation analysis unit selects two groups of adjacent points from all the points distributed in the matrix, and calculates the height coordinate difference of the adjacent points to obtain the elevation difference;

[0038] The elevation analysis unit calculates the difference of the height coordinates of all points in the matrix with the adjacent points through the traversal method, obtains multiple sets of elevation differences, and performs arithmetic averaging on all elevation differences to obtain the average elevation difference;

[0039] The elevation analysis unit compares multiple groups of elevation differences to obtain the maximum value Hmax and the minimum value Hmin in the multiple groups of elevation differences. The elevation analysis unit calculates the maximum value and the minimum value in the elevation difference according to a preset ratio to obtain a large difference range a×Hmax~Hmax, where a<1, and obtains a small difference range Hmin~b×Hmin, where b>1, and a×Hmax>b×Hmin;

[0040] The elevation analysis unit compares all elevation differences with the large difference range and the small difference range. If the elevation difference is within the large difference range, it is recorded as a large elevation difference. If the elevation difference is within the small difference range, it is recorded as a small elevation difference. If the elevation difference is not within the large difference range or the small difference range, it is recorded as a medium elevation difference.

[0041] The elevation analysis unit calculates the proportion of large elevation difference, medium elevation difference and small elevation difference respectively, and generates the seabed flatness coefficient FL through formula analysis. Among them, A is the proportion of large elevation differences, B is the proportion of medium elevation differences, C is the proportion of small elevation differences, and P is the average elevation difference.

[0042] Embodiment three:

[0043] See also Figure 1 - Figure 2 As shown, the grid adjustment unit obtains the seabed flatness coefficient FL through the elevation analysis unit, and calculates the ratio of the seabed flatness coefficient FL to the set flatness coefficient threshold to obtain the flatness ratio. The grid adjustment unit obtains the preset initial grid size, and calculates the product of the flatness ratio and the initial grid to obtain the adjusted grid volume, and sends the adjusted grid volume to the engineering quantity calculation unit;

[0044] The engineering quantity calculation unit specifies the slope edge and slope slope through the Civil3D slope tool and generates a foundation pit model. The engineering quantity calculation unit grids the foundation pit model and calculates the excavation volume of the foundation pit model based on the grids occupied by the foundation pit model and the volume of each grid.

[0045] The engineering quantity calculation unit analyzes the gridded foundation trench model, selects all the grids located at the edge of the foundation trench model, marks the grids at the edge as edge grids, and records the grids that are not at the edge as center grids. The engineering quantity calculation unit calculates the ratio of the number of edge grids to the number of center grids, thereby obtaining the edge ratio. The engineering quantity calculation unit compares the edge ratio with a preset ratio threshold. If the edge ratio is greater than the preset ratio threshold, an edge excess signal is generated. If the edge ratio is not greater than the preset ratio threshold, an edge normal signal is generated.

[0046] After generating the edge normal signal, the engineering quantity calculation unit sends the excavation amount of the foundation trench model to the result output unit, and the result output unit outputs the excavation amount of the foundation trench model;

[0047] The engineering quantity calculation unit sends the edge excess signal and the edge ratio to the grid adjustment unit. After obtaining the edge excess signal, the grid adjustment unit reduces the grid volume. The method for reducing the grid volume is:

[0048] The grid adjustment unit obtains the edge ratio, and performs difference calculation between the edge ratio and the preset ratio threshold to obtain the edge ratio deviation, and then calculates the ratio between the edge ratio deviation and the edge ratio, and records it as the adjustment ratio. The grid adjustment unit adjusts the current grid volume according to the adjustment ratio to obtain the adjusted grid volume V, V=V0*(1-B), where V0 is the current grid volume and B is the adjustment ratio;

[0049] The grid adjustment unit sends the adjusted grid volume to the engineering quantity calculation unit. The engineering quantity calculation unit calculates the excavation volume of the foundation pit model again according to the adjusted grid volume, and calculates the edge ratio of the grid in the foundation pit model. If an excessive edge signal is still generated, the excessive edge signal and the edge ratio are sent to the grid volume adjustment unit again. If a normal edge signal is generated, the excavation volume of the foundation pit model is sent to the result output unit. The result output unit outputs the excavation volume of the foundation pit model, thereby completing the evaluation of the foundation pit excavation engineering quantity.

[0050] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A BIM-based hydraulic fill foundation slope trench excavation engineering quantity assessment system, characterized in that: It includes a scanning and generating unit, which is used to scan the seabed plane and generate a seabed map before dredging according to the scanning result; an elevation analysis unit, wherein the elevation analysis unit obtains a seabed map before dredging, performs elevation analysis on the seabed map before dredging, and generates a seabed flatness coefficient according to the elevation analysis result; An engineering quantity calculation unit, wherein the engineering quantity calculation unit performs a slope processing on the seabed map before dredging according to the set slope edge and slope, obtains a foundation trench model after the construction is completed through the slope processing, performs a grid processing on the foundation trench model, obtains the number of excavation grids, and evaluates the excavation volume through the number of grids; A grid adjustment unit, wherein the grid adjustment unit obtains a seabed flatness coefficient and adjusts the grid volume according to the seabed flatness coefficient. The grid adjustment unit can also obtain the number of excavated grids and perform analysis through the excavated grids, thereby adjusting the single grid volume again; A result output unit is used to obtain the excavation quantity and output the excavation quantity.

2. According to the BIM model-based dredger fill foundation slope foundation trench excavation engineering quantity assessment system of claim 1, it is characterized by: When scanning the seabed plane, the scanning generation unit detects echoes of the seabed plane by means of sonar or radar, and constructs a three-dimensional model by means of a machine binocular vision algorithm; The two sets of sonar or radar are located on the same sea level, and the line between the two sets of sonar or radar is perpendicular to the scanning direction.

3. The BIM-based dredger fill foundation slope excavation engineering quantity assessment system according to claim 1 is characterized in that: The elevation analysis unit sets a plurality of points distributed in a matrix in the seabed map before dredging, and obtains the height coordinate corresponding to each point; The elevation analysis unit calculates the difference of the height coordinates of all points in the matrix with adjacent points by traversal method, obtains multiple groups of elevation differences, and performs arithmetic averaging on all elevation differences to obtain an average elevation difference.

4. The BIM-based dredger fill foundation slope excavation engineering quantity assessment system according to claim 3 is characterized in that: The elevation analysis unit obtains the maximum value Hmax and the minimum value Hmin in the plurality of elevation differences, and calculates the maximum value and the minimum value in the elevation difference according to a preset ratio to obtain a large difference range a×Hmax~Hmax, where a<1, and obtains a small difference range Hmin~b×Hmin, where b>1, and a×Hmax>b×Hmin; The elevation analysis unit classifies all elevation differences into large elevation difference and small elevation difference according to a large difference range and a small difference range. If the elevation difference is not within the large difference range and the small difference range at the same time, it is recorded as a medium elevation difference. The elevation analysis unit calculates the proportion of large elevation difference, medium elevation difference and small elevation difference respectively, and generates the seabed flatness coefficient FL through formula analysis. Among them, A is the proportion of large elevation differences, B is the proportion of medium elevation differences, C is the proportion of small elevation differences, and P is the average elevation difference.

5. The BIM-based dredger fill foundation slope trench excavation engineering quantity assessment system according to claim 4 is characterized in that: The grid adjustment unit calculates the ratio of the seabed flatness coefficient FL to the set flatness coefficient threshold to obtain the flatness ratio. The grid adjustment unit obtains the preset initial grid size, and multiplies the flatness ratio by the initial grid to obtain the adjusted grid volume, and sends the adjusted grid volume to the engineering quantity calculation unit.

6. The BIM-based dredger fill foundation slope trench excavation engineering quantity assessment system according to claim 5 is characterized in that: The engineering quantity calculation unit specifies the slope edge and slope slope through the Civil3D slope tool and generates a foundation pit model. The engineering quantity calculation unit grids the foundation pit model and calculates according to the grids occupied by the foundation pit model and the volume of each grid to obtain the excavation volume of the foundation pit model.

7. The BIM-based dredger fill foundation slope trench excavation engineering quantity assessment system according to claim 6 is characterized in that: The engineering quantity calculation unit selects all grids located at the edge of the foundation groove model and marks them as edge grids, and records the grids that are not at the edge as center grids. The engineering quantity calculation unit calculates the ratio of the number of edge grids to the number of center grids to obtain the edge ratio, and compares the edge ratio with a preset ratio threshold to generate an edge excess signal or an edge normal signal; After generating the edge normal signal, the engineering quantity calculation unit sends the excavation amount of the foundation trench model to the result output unit, and the result output unit outputs the excavation amount of the foundation trench model.

8. The BIM-based dredger fill foundation slope trench excavation engineering quantity assessment system according to claim 7 is characterized in that: The engineering quantity calculation unit sends the edge excess signal and the edge ratio to the grid adjustment unit, and the grid adjustment unit reduces the grid volume. The method for reducing the grid volume is as follows: The grid adjustment unit calculates the difference between the edge ratio and the preset ratio threshold to obtain the edge ratio deviation, and then calculates the ratio between the edge ratio deviation and the edge ratio, and records it as the adjustment ratio. The grid adjustment unit adjusts the current grid volume according to the adjustment ratio to obtain the adjusted grid volume V, V=V0*(1-B), where V0 is the current grid volume and B is the adjustment ratio; The grid adjustment unit sends the adjusted grid volume to the engineering quantity calculation unit, which recalculates the excavation volume of the foundation pit model based on the adjusted grid volume and sends the excavation volume of the foundation pit model to the result output unit, which outputs the excavation volume of the foundation pit model.

Images