Multi-gully waste slag field modeling method

Abstract

The invention discloses a multi-gully abandoned slag yard modeling method, and relates to the technical field of three-dimensional modeling, and the method comprises the steps: drawing a main gully slag top center line from top to bottom in a gully at an abandoned slag yard position selected in a GIS environment, and designing a main gully longitudinal section according to the main gully slag top center line; based on the main channel slag top center line and the main channel longitudinal section, a main channel waste slag field model is built through a slag top center line double-side slope line intersection modeling method; based on the main channel waste slag field model, drawing a branch channel slag top center line in a channel at a selected branch channel waste slag field position from bottom to top, and designing a branch channel longitudinal section according to the branch channel slag top center line; on the basis of the branch ditch slag top center line and the branch ditch longitudinal section, a branch ditch waste slag field model is built through a slag top center line double-side slope line intersection modeling method; and combining the main ditch abandoned slag field model and the branch ditch abandoned slag field model into a multi-gully abandoned slag field model, and carrying out engineering construction based on the multi-gully abandoned slag field model.

Description

Technical Field

[0001] The present application relates to the technical field of three-dimensional modeling, and in particular to a modeling method for a multi-gully waste dump. Background Art

[0002] In the field of civil engineering and environmental engineering, 3D modeling of gully-type waste dumps is an important technical link. Traditional modeling methods mainly rely on the slope method and the characteristic line method, which have certain application value under specific terrain and engineering conditions. Although these methods can effectively create 3D models of waste dumps in some cases, they cannot adapt to complex and changeable slope directions, especially for gullies with multiple gullies, and have obvious shortcomings.

[0003] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of this application is to provide a multi-gully waste dump modeling method, which aims to solve the technical problem that the traditional gully type waste dump modeling method mainly relies on the slope method and characteristic line method that cannot adapt to the complex and changeable slope direction.

[0005] To achieve the above objectives, the present application proposes a multi-gully waste dump modeling method, the multi-gully waste dump modeling method comprising:

[0006] In one embodiment, a main trench slag top centerline is drawn from top to bottom in a trench at a spoil dump location selected in a GIS environment, and a main trench longitudinal section is designed based on the main trench slag top centerline;

[0007] Based on the center line of the main ditch slag top and the longitudinal section of the main ditch, a main ditch abandoned slag field model is constructed by using the intersection modeling method of the double-side slope lines of the center line of the slag top;

[0008] Based on the main ditch waste dump model, a branch ditch slag top centerline is drawn from bottom to top in the ditch at the selected branch ditch waste dump location, and a branch ditch longitudinal section is designed according to the branch ditch slag top centerline;

[0009] Based on the center line of the slag top of the branch ditch and the longitudinal section of the branch ditch, a branch ditch abandoned slag field model is constructed by using the intersection modeling method of the double-side slope lines of the slag top center line;

[0010] The main ditch waste dump model and the branch ditch waste dump model are combined into a multi-gully waste dump model, so as to carry out engineering construction based on the multi-gully waste dump model.

[0011] In one embodiment, the step of designing the longitudinal section of the main ditch according to the center line of the slag top of the main ditch comprises:

[0012] Determine the main trench endpoint coordinates on the main trench slag top centerline;

[0013] Determine the original ground elevation of the main ditch and the initial design elevation of the slag top of the main ditch according to the coordinates of the main ditch endpoints;

[0014] The initial longitudinal section of the main ditch is formed based on the original ground elevation of the main ditch and the initial design elevation of the slag top of the main ditch;

[0015] The main ditch longitudinal slope grading parameters are set, and the main ditch longitudinal section is formed according to the main ditch longitudinal slope grading parameters based on the main ditch initial longitudinal section, wherein the main ditch longitudinal slope grading parameters include the horseway platform width, the horseway platform slope, the slope height and the slope ratio.

[0016] In one embodiment, the step of constructing the main ditch abandoned slag field model based on the main ditch slag top center line and the main ditch longitudinal section by using the slag top center line double-side slope line intersection modeling method includes:

[0017] Based on the center line of the main ditch slag top and the longitudinal section of the main ditch, the intersection point of the main ditch slag body surface and the original ground is determined by using the intersection modeling method of the double-side slope lines of the slag top center line, and the modeling range line of the abandoned slag field is generated according to the intersection point of the main ditch and the ground;

[0018] Based on the center line of the main ditch slag top, the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall are respectively obtained, and the retaining wall model is constructed according to the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall;

[0019] Based on the modeling range line of the waste dump and the retaining wall model, a main ditch waste dump model is constructed.

[0020] In one embodiment, the steps of determining the intersection point of the main ditch with the ground based on the center line of the main ditch slag top and the longitudinal section of the main ditch by using the intersection modeling method of the double-side slope lines of the center line of the slag top, and generating the modeling range line of the abandoned slag field according to the intersection point of the main ditch with the ground include:

[0021] Acquire a plurality of main ditch slag top center line reference points on the main ditch slag top center line according to preset intervals;

[0022] Taking the centerline reference point of the main ditch top as the base point, draw the main ditch cross-section lines on both sides of the main ditch longitudinal section according to the surface runoff convergence gradient;

[0023] Determine the coordinates of the main ditch sampling points on the main ditch cross-section line according to the main ditch centerline reference point, the surface runoff confluence gradient and the sampling point spacing;

[0024] Obtaining the height difference between the coordinates of the main ditch sampling point and the vertical projection point of the coordinates of the main ditch sampling point on the ground, and when the height difference is less than a preset threshold, determining that the coordinates of the main ditch sampling point are the intersection points of the main ditch and the ground;

[0025] The intersection points of the main ditch ground are connected in sequence to generate the modeling range line of the waste dump.

[0026] In one embodiment, the steps of respectively obtaining the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the oblique line of the retaining wall and the lower edge boundary line of the retaining wall based on the center line of the main ditch slag top, and constructing a retaining wall model according to the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the oblique line of the retaining wall and the lower edge boundary line of the retaining wall include:

[0027] The bottom baseline of the most downstream side slope of the main ditch slag body is generated by connecting the main ditch slag top centerline reference point at the most downstream main ditch centerline and the main ditch ground intersection points on both sides;

[0028] The center line of the main ditch top is extended outward by a preset platform width according to the drainage slope at the most downstream main ditch center line reference point to obtain a wall back reference point, and the wall back reference point is connected with the intersection points of the main ditch ground on both sides to generate a wall back baseline;

[0029] The wall back reference point is offset outward according to the top width of the retaining wall to obtain the wall surface reference point, and the wall surface reference point is connected with the intersection points of the main ditch ground on both sides to generate the wall surface baseline;

[0030] On the basis of the wall back baseline and the wall surface baseline, retaining wall points are taken at the same intervals, and on the basis of the retaining wall points, retaining wall oblique lines are drawn according to the retaining wall slope. The retaining wall oblique lines are extended to intersect with the original ground. After the retaining wall oblique lines intersect with the original ground, they continue to extend downward according to the retaining wall slope and the foundation burial depth to reserve the retaining wall foundation, and finally the lowest endpoint of the retaining wall oblique lines is obtained. The lowest endpoints of multiple retaining wall oblique lines are connected to obtain the lower edge boundary line of the retaining wall, and a retaining wall model is constructed according to the bottom baseline of the downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall.

[0031] In one embodiment, the step of drawing the center line of the branch ditch slag top from bottom to top in the ditch at the selected branch ditch slag dump location based on the main ditch slag dump model comprises:

[0032] Determine the main-branch ditch junction on the slag dump modeling range line of the main ditch slag dump model;

[0033] Select two endpoints at the junction of the main ditch and the branch ditch to draw the starting line of the branch ditch modeling;

[0034] A drawing starting point is selected on the branch ditch modeling starting line, and a branch ditch slag top center line is drawn from bottom to top along the branch ditch channel at the branch ditch slag dump location, wherein the drawing starting point of the branch ditch slag top center line is constrained on the branch ditch modeling starting line.

[0035] In one embodiment, the step of designing the longitudinal section of the branch ditch according to the center line of the slag top of the branch ditch comprises:

[0036] Determine the branch ditch endpoint coordinates on the branch ditch slag top centerline;

[0037] According to the branch ditch endpoint coordinates at the original ground elevation of the branch ditch and the initial design elevation of the branch ditch slag top;

[0038] The initial longitudinal section of the branch ditch is formed based on the original ground elevation of the branch ditch and the initial design elevation of the slag top of the branch ditch;

[0039] The branch ditch longitudinal slope grading parameters are set, and the branch ditch longitudinal section is formed according to the branch ditch longitudinal slope grading parameters based on the initial branch ditch longitudinal section, wherein the branch ditch longitudinal slope grading parameters include the horseway platform width, the horseway platform slope, the slope height and the slope ratio.

[0040] In one embodiment, the step of constructing the branch ditch waste dump model based on the branch ditch slag top center line and the branch ditch longitudinal section by using the slag top center line double-side slope line intersection modeling method includes:

[0041] Acquire multiple branch ditch centerline reference points on the branch ditch slag top centerline according to preset intervals;

[0042] Taking the branch ditch midline reference point as the base point, draw the branch ditch cross-section line on both sides on the branch ditch longitudinal section, wherein the branch ditch cross-section line is parallel to the branch ditch modeling starting line;

[0043] Determine the branch ditch sampling point coordinates on the branch ditch cross-section line according to the branch ditch centerline reference point, surface runoff confluence gradient and sampling point spacing;

[0044] Obtaining the height difference between the branch ditch sampling point coordinates and the vertical projection point of the branch ditch sampling point coordinates on the ground, and when the height difference is less than a preset threshold, determining the branch ditch sampling point coordinates as the branch ditch ground intersection point;

[0045] The branch ditch ground intersection points are connected in sequence to generate a branch ditch modeling range line, and a branch ditch waste dump model is constructed according to the branch ditch modeling range line.

[0046] In one embodiment, the step of constructing a branch ditch waste dump model according to the branch ditch modeling range line includes:

[0047] Based on the branch ditch modeling starting line, the branch ditch modeling range line and the branch ditch cross-section line, a branch ditch waste dump model is constructed.

[0048] In addition, to achieve the above purpose, the present application also proposes a multi-gully waste dump modeling method device, the multi-gully waste dump modeling method device comprising:

[0049] A design module is used to draw the center line of the main ditch slag top from top to bottom in the ditch at the location of the waste dump selected in the GIS environment, and design the main ditch longitudinal section according to the center line of the main ditch slag top;

[0050] A construction module is used to construct a main ditch waste dump model based on the main ditch slag top center line and the main ditch longitudinal section by adopting the intersection modeling method of the slag top center line double-side slope lines;

[0051] The design module is further used to draw the center line of the branch ditch slag top from bottom to top in the ditch at the selected branch ditch slag site location based on the main ditch slag site model, and design the branch ditch longitudinal section according to the center line of the branch ditch slag top;

[0052] The construction module is also used to construct a branch ditch waste dump model based on the branch ditch slag top center line and the branch ditch longitudinal section by adopting the intersection modeling method of the slag top center line double-side slope lines;

[0053] The merging module is used to merge the main ditch waste dump model and the branch ditch waste dump model into a multi-gully waste dump model, so as to perform engineering construction based on the multi-gully waste dump model.

[0054] In addition, to achieve the above-mentioned objectives, the present application also proposes a multi-gully waste dump modeling device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the computer program is configured to implement the steps of the multi-gully waste dump modeling method as described above.

[0055] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the multi-gully waste dump modeling method as described above are implemented.

[0056] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the multi-gully waste dump modeling method as described above are implemented.

[0057] One or more technical solutions proposed in this application have at least the following technical effects:

[0058] The present application proposes a multi-gully waste dump modeling method, which comprises the following steps: drawing the center line of the main ditch slag top from top to bottom in the ditch at the waste dump location selected in the GIS environment, and designing the main ditch longitudinal section according to the center line of the main ditch slag top; constructing the main ditch waste dump model by adopting the intersection modeling method of the double-side slope lines of the slag top center line based on the center line of the main ditch slag top and the main ditch longitudinal section; drawing the center line of the branch ditch slag top from bottom to top in the ditch at the selected branch ditch waste dump location based on the center line of the branch ditch slag top, and designing the branch ditch longitudinal section according to the center line of the branch ditch slag top; constructing the branch ditch waste dump model by adopting the intersection modeling method of the double-side slope lines of the slag top center line based on the center line of the branch ditch slag top and the branch ditch longitudinal section; merging the main ditch waste dump model and the branch ditch waste dump model into a multi-gully waste dump model. Engineering construction is carried out based on the multi-gully waste dump model, which solves the technical problem that the slope method and characteristic line method mainly relied on by the traditional ditch-type waste dump modeling method cannot adapt to the complex and changeable slope direction. Compared with the existing technology, the present application adopts the ditch-type waste dump slag top centerline double-sided slope line intersection modeling method to construct the main ditch waste dump model and the branch ditch waste dump model, and can also merge the main ditch waste dump model and the branch ditch waste dump model based on the branch ditch and main ditch connection modeling method in the case of multiple gullies in the waste dump to obtain a multi-gully waste dump model, which can solve the problem of the fusion and intersection of the slope of the single ditch waste dump modeling project and the terrain and the main ditch and branch ditch connection modeling problem of the ditch-type waste dump with multiple gullies, thereby achieving adaptation to the complex and changeable slope direction when creating a three-dimensional model of the waste dump. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A schematic diagram of a process flow provided in Example 1 of a multi-gully waste dump modeling method of the present application;

[0060] Figure 2 A drawing of the centerline of the main ditch slag top provided in the first embodiment of the multi-gully waste dump modeling method of the present application;

[0061] Figure 3 A schematic diagram of the initial longitudinal section of the main ditch provided in Example 1 of the multi-gully waste dump modeling method of the present application;

[0062] Figure 4 A schematic diagram of the main ditch longitudinal section design provided in the first embodiment of the multi-gully waste dump modeling method of the present application;

[0063] Figure 5 A schematic diagram of the centerline point selection of the main ditch slag top provided in Example 1 of the multi-gully waste dump modeling method of the present application;

[0064] Figure 6 A three-dimensional schematic diagram of the centerline points of the main ditch slag top provided in Example 1 of the multi-gully waste dump modeling method of the present application;

[0065] Figure 7A schematic diagram of the intersection of the center line of the main ditch slag top with the ground on both sides provided in the first embodiment of the multi-gully waste dump modeling method of the present application;

[0066] Figure 8 A three-dimensional schematic diagram of the intersection of the center line of the main ditch slag top with the ground on both sides provided in the first embodiment of the multi-gully waste dump modeling method of the present application;

[0067] Fig. 9 A schematic diagram of the modeling range line of the main ditch waste dump provided in Example 1 of the multi-gully waste dump modeling method of the present application;

[0068] Fig.10 A three-dimensional schematic diagram of the intersection of the double baseline of the retaining wall and the ground provided in the first embodiment of the multi-gully waste dump modeling method of the present application;

[0069] Fig.11 A schematic diagram of a retaining wall cross section provided in Example 1 of the multi-gully waste dump modeling method of the present application;

[0070] Fig.12 This is a retaining wall network modeling effect diagram provided in Example 1 of the multi-gully waste dump modeling method of this application;

[0071] Fig.13 A triangulated network diagram of a main ditch waste dump model provided in Example 1 of the multi-gully waste dump modeling method of the present application;

[0072] Fig.14 This is an effect diagram of the main ditch waste dump model after texture mapping provided in Example 1 of the multi-gully waste dump modeling method of the present application;

[0073] Fig.15 The modeling effect diagram of the main ditch waste dump in the three-dimensional geographical scene provided in the first embodiment of the multi-gully waste dump modeling method of the present application;

[0074] Fig.16 A flowchart for implementing the technical solution provided in Example 1 of the multi-gully waste dump modeling method of the present application;

[0075] Fig.17 This is a rendering of the texture mapping of the multi-gully waste dump model provided in the first embodiment of the multi-gully waste dump modeling method of the present application;

[0076] Fig.18 The rendering of modeling a multi-gully waste dump in a three-dimensional geographical scene provided in the first embodiment of the multi-gully waste dump modeling method of the present application;

[0077] Fig.19 A schematic diagram of a flow chart of a second embodiment of a multi-gully waste dump modeling method of the present application;

[0078] Fig. 20A drawing diagram of the starting line for modeling a branch gully waste dump provided in Example 2 of the multi-gully waste dump modeling method of the present application;

[0079] Fig.21 This is a diagram showing the effect of the main ditch waste dump modeling network line being cut off, provided in Example 2 of the multi-gully waste dump modeling method of this application;

[0080] Fig. 22 A drawing of the centerline of the slag top of the branch gully provided in the second embodiment of the method for modeling a multi-gully waste dump of the present application;

[0081] Fig.23 A schematic diagram of the initial longitudinal section of a branch ditch provided in Example 2 of the multi-gully waste dump modeling method of the present application;

[0082] Fig.24 A schematic diagram of the longitudinal section design of the branch gullies provided in the second embodiment of the multi-gully waste dump modeling method of the present application;

[0083] Fig.25 A triangulated network diagram of a branch gully waste dump model provided in Example 2 of the multi-gully waste dump modeling method of the present application;

[0084] Fig.26 This is a rendering of the texture mapping of the branch gully waste dump model provided in Example 2 of the multi-gully waste dump modeling method of the present application;

[0085] Fig. 27 This is a schematic diagram of the module structure of a multi-gully waste dump modeling device according to an embodiment of the present application;

[0086] Fig.28 Schematic diagram of the equipment structure of the hardware operating environment involved in the multi-gully waste dump modeling method in the embodiment of the present application. DETAILED DESCRIPTION

[0087] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0088] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0089] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a multi-gully waste dump modeling device, etc. The following takes the multi-gully waste dump modeling device as an example to illustrate this embodiment and the following embodiments.

[0090] Based on this, the present application embodiment provides a multi-gully waste dump modeling method, referring to Figure 1 , Figure 1 This is a schematic flow chart of the first embodiment of the multi-gully waste dump modeling method of the present application.

[0091] In this embodiment, the multi-gully waste dump modeling method includes steps S10 to S50:

[0092] Step S10, drawing the center line of the main ditch slag top from top to bottom in the ditch at the location of the waste dump selected in the GIS environment, and designing the main ditch longitudinal section according to the center line of the main ditch slag top;

[0093] It should be noted that the waste dump refers to the general term for the disposal or storage sites for unusable excavated earth and stone, demolished concrete or their mixtures during engineering construction; gullies refer to the grooves formed by intermittent water scouring on the surface. They are the largest type of erosion gullies, with a length of several kilometers or tens of kilometers, a depth of several meters or tens of meters, and sometimes more than a hundred meters. Gullies are very common in hilly and mountainous areas and can be divided into main ditches and branch ditches according to their characteristics and functions; main ditch refers to the backbone ditch where the water flow collected by precipitation is mainly concentrated, which is generally longer, wider and deeper and can accommodate more water and waste; branch ditch refers to the water flow that only collects part of the slope, which is connected to the main ditch and has a certain height difference with the main ditch. The water flow converges into the secondary ditch of the main ditch, and its scale is smaller than the main ditch.

[0094] In a feasible implementation manner, the step of designing the longitudinal section of the main ditch according to the center line of the main ditch slag top includes: determining the coordinates of the main ditch endpoint on the center line of the main ditch slag top; determining the original ground elevation of the main ditch and the initial design elevation of the main ditch slag top according to the coordinates of the main ditch endpoint; forming the initial longitudinal section of the main ditch based on the original ground elevation of the main ditch and the initial design elevation of the main ditch slag top; setting the main ditch longitudinal slope grading parameters, and forming the main ditch longitudinal section according to the main ditch longitudinal slope grading parameters based on the initial longitudinal section of the main ditch, wherein the main ditch longitudinal slope grading parameters include the horseway platform width, the horseway platform slope, the slope height and the slope ratio.

[0095] It should be noted that if Figure 2 As shown in the figure, the center line of the main ditch slag top is drawn from top to bottom in the main ditch at the location of the proposed waste dump (in the GIS environment), and the original ground elevation of the main ditch and the initial design elevation of the main ditch slag top (generally, the initial design elevation of the slag top is 3 to 5 meters higher than the original ground elevation) are obtained according to the coordinates of each main ditch endpoint on the center line of the main ditch slag top. Figure 3 The initial longitudinal section of the waste dump (i.e. the initial longitudinal section of the main ditch) is shown.

[0096] It should be noted that the main ditch longitudinal slope classification parameters are set based on the initial longitudinal section of the main ditch. Specifically, the width of the bridleway platform is 2 to 5 m, the slope of the bridleway platform is 4%, the slope height is 6 to 8 m, and the slope ratio is 1:1.5 to 1:3. Then, based on the initial longitudinal section of the main ditch, the main ditch longitudinal section is designed according to the main ditch longitudinal slope classification parameters (such as Figure 4 After the design is completed, the main ditch slag body modeling process begins.

[0097] Step S20, based on the main ditch slag top center line and the main ditch longitudinal section, a main ditch abandoned slag field model is constructed by using a slag top center line double-side slope line intersection modeling method;

[0098] In a feasible implementation manner, the step of constructing a main ditch slag dump model based on the center line of the main ditch slag top and the longitudinal section of the main ditch by using the intersection modeling method of the center line of the slag top and the double-sided slope lines includes: based on the center line of the main ditch slag top and the longitudinal section of the main ditch, the intersection modeling method of the center line of the slag top and the double-sided slope lines is used to determine the intersection point between the main ditch slag body surface and the original ground, and generate the slag dump modeling range line according to the main ditch ground intersection point; based on the center line of the main ditch slag top, the bottom baseline of the downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall are obtained respectively, and a retaining wall model is constructed according to the bottom baseline of the downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall; based on the slag dump modeling range line and the retaining wall model, a main ditch slag dump model is constructed.

[0099] It should be noted that the intersection modeling method of the double-sided slope lines of the slag top center line is used to realize the three-dimensional modeling of the slag body in the main ditch of the slag dump. The center line of the slag top of the main ditch is mainly used as the highest point of the slag. Drawing on the principle that the surface runoff flows from the center line of the slag top to the intercepting ditch at the foot of the hillside on both sides, the surface runoff confluence gradient of the slag top is set. The gradient value range is generally 1% to 4%. The surface runoff confluence gradient can be set by the user according to needs.

[0100] In a feasible implementation manner, the step of determining the main ditch ground intersection point based on the main ditch slag top centerline and the main ditch longitudinal section by using the slag top centerline double-side slope line intersection modeling method, and generating the waste dump modeling range line according to the main ditch ground intersection point includes: obtaining multiple main ditch slag top centerline reference points on the main ditch slag top centerline according to preset spacing; taking the main ditch slag top centerline reference point as the base point, drawing the main ditch cross-section lines on both sides of the main ditch longitudinal section according to the surface runoff convergence gradient; determining the main ditch sampling point coordinates on the main ditch cross-section line according to the main ditch centerline reference point, the surface runoff convergence gradient and the sampling point spacing; obtaining the height difference between the main ditch sampling point coordinates and the main ditch sampling point coordinates on the ground vertical projection point, and when the height difference is less than a preset threshold, determining the main ditch sampling point coordinates as the main ditch ground intersection point; connecting the main ditch ground intersection points in sequence to generate the waste dump modeling range line.

[0101] It should be noted that slope refers to the ratio of the vertical height h and horizontal width l of the slope, that is, the tangent value of the slope angle, also called slope ratio or slope rate, usually represented by "i"; slope angle refers to the angle between the slope surface and the horizontal plane, usually represented by "α"; gradient refers to the ratio of the elevation difference between any two endpoints to the horizontal distance between the two points; river gradient refers to the ratio of the instantaneous water surface elevation difference between any two endpoints in the river to the corresponding horizontal distance, which is used to indicate the water surface slope of the entire river or a section, so it is also called hydraulic gradient.

[0102] It should be noted that if Figure 5 as well as Figure 6 As shown in the figure, points can be taken at certain intervals on the center line of the main ditch slag top and named as the main ditch center line reference points.

[0103] In the specific implementation, Figure 7 As shown Figure 8 As shown in the figure, take any main ditch centerline reference point as the base point (each main ditch centerline reference point needs to determine its corresponding main ditch ground intersection point), draw cross-section lines to both sides according to the set surface runoff convergence gradient, obtain main ditch sampling points at a certain interval on the main ditch cross-section line, and calculate the main ditch sampling point P according to the coordinates of the reference point O (X0, Y0, Z0) (where Z0 is the elevation), the cross-section slope (surface runoff convergence gradient i), and the sampling point spacing d. n Coordinate (X n , Y n , Z n )(where Z n is the elevation), according to the main ditch sampling point P n Coordinate (X n , Y n ) Get the vertical projection point P of the main ditch sampling point on the ground nd The height (Z nd ), for Zn With Z nd Calculate the difference. When the difference is within the specified threshold range, stop taking points on the cross-section line. That is, it is considered that the cross-section line of the main ditch intersects with the ground at this main ditch sampling point. At this time, the main ditch sampling point can be determined as the main ditch ground intersection point corresponding to the main ditch slag top centerline reference point. Finally, all the main ditch ground intersection points that intersect with the original ground are connected in sequence to generate the main ditch abandoned slag field modeling range line (such as Fig. 9 shown).

[0104] In a feasible implementation manner, the steps of respectively obtaining the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the oblique line of the retaining wall and the lower edge boundary line of the retaining wall based on the center line of the main ditch slag top, and constructing a retaining wall model according to the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the oblique line of the retaining wall and the lower edge boundary line of the retaining wall include: connecting the main ditch slag top center line reference point at the most downstream main ditch center line with the main ditch ground intersection points on both sides to generate the bottom baseline of the most downstream slope of the main ditch slag body, extending the main ditch slag top center line at the most downstream main ditch center line reference point outward by a preset platform width according to the drainage slope to obtain the wall back reference point, and connecting the wall back reference point with the main ditch ground intersection points on both sides to generate the wall back baseline; The wall back reference point is offset outward according to the top width of the retaining wall to obtain the wall surface reference point, and the wall surface reference point is connected with the intersection points of the main ditch ground on both sides to generate the wall surface baseline; retaining wall points are taken at the same interval on the basis of the wall back baseline and the wall surface baseline, and retaining wall oblique lines are drawn according to the retaining wall slope on the basis of the retaining wall points. The retaining wall oblique lines are extended to intersect with the original ground. After the retaining wall oblique lines intersect with the original ground, they continue to extend downward according to the retaining wall slope and the foundation burial depth to reserve the retaining wall foundation, and finally the lowest endpoint of the retaining wall oblique lines is obtained. The lowest endpoints of multiple retaining wall oblique lines are connected to obtain the lower edge boundary line of the retaining wall, and a retaining wall model is constructed according to the bottom baseline of the downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall.

[0105] It should be noted that if Fig.10 As shown, the main ditch centerline reference point at the most downstream of the main ditch slag top centerline is extended outward by a certain platform width according to the drainage slope to obtain the back wall reference point of the retaining wall. The back wall reference point intersects with the ground on both sides to obtain the main ditch ground intersection point. The back wall reference point is connected with the main ditch ground intersection points on both sides to generate the back wall baseline; the back wall reference point is offset outward according to the width of the retaining wall top to obtain the wall surface reference point. The wall surface reference point intersects with the ground on both sides to obtain the main ditch ground intersection point. The wall surface reference point is connected with the main ditch ground intersection points on both sides to generate the wall surface baseline; points are taken on the back wall baseline and the wall baseline at the same interval, and oblique lines are drawn according to the retaining wall slope to intersect with the ground. After intersecting with the ground, the retaining wall foundation is reserved downward according to the retaining wall slope and foundation burial depth, and finally a retaining wall section is formed (as shown in FIG. Fig.11 After networking, a retaining wall model is formed (as shown in Fig.12 shown).

[0106] In the specific implementation, the centerline reference point on the centerline of the main ditch slag top and the intersection points on the surrounding modeling range lines are connected in sequence to form a network to form an initial model of the slag dump (such as Fig.13 Then, according to the retaining wall, the bridleway platform, the slope, the slag top platform and other different areas, the texture pictures of appropriate size are fitted, and finally the 3D modeling of the waste dump is completed (that is, the main ditch waste dump model, as shown in Fig.14 As shown in Fig.15 Modeling effect of main ditch waste dump in three-dimensional geographic scene.

[0107] Step S30, based on the main ditch waste dump model, drawing the branch ditch slag top center line from bottom to top in the ditch at the selected branch ditch waste dump location, and designing the branch ditch longitudinal section according to the branch ditch slag top center line;

[0108] Step S40, based on the branch ditch slag top center line and the branch ditch longitudinal section, a branch ditch abandoned slag field model is constructed by using the slag top center line double-side slope line intersection modeling method;

[0109] Step S50: merging the main ditch waste dump model and the branch ditch waste dump model into a multi-gully waste dump model, so as to perform engineering construction based on the multi-gully waste dump model.

[0110] In the specific implementation, Fig.16 The implementation flow chart of the technical solution shown in the figure requires, in sequence, drawing the center line of the main ditch slag top, designing the longitudinal section of the main ditch, modeling the main ditch slag body, drawing the starting line of the branch ditch modeling, drawing the center line of the branch ditch slag top, designing the longitudinal section of the branch ditch, modeling the branch ditch slag body, and merging the branch ditch and main ditch models.

[0111] In the specific implementation, Fig.17 This is the effect of the merged multi-gully waste dump model after texture mapping. Fig.18 This is the modeling effect diagram of a multi-gully waste dump in a three-dimensional geographic scene.

[0112] The present application draws the center line of the main ditch slag top from top to bottom in the ditch at the location of the waste dump selected in the GIS environment, and designs the main ditch longitudinal section according to the center line of the main ditch slag top; based on the center line of the main ditch slag top and the main ditch longitudinal section, the main ditch waste dump model is constructed by adopting the intersection modeling method of the slag top center line double-sided slope lines; based on the main ditch waste dump model, the center line of the branch ditch slag top is drawn from bottom to top in the ditch at the selected branch ditch waste dump location, and the branch ditch longitudinal section is designed according to the center line of the branch ditch slag top; based on the center line of the branch ditch slag top and the branch ditch longitudinal section, the branch ditch waste dump model is constructed by adopting the intersection modeling method of the slag top center line double-sided slope lines; the main ditch waste dump model and the branch ditch waste dump model are merged into a multi-gully waste dump model to The slag dump model is used for engineering construction, which solves the technical problem that the slope method and characteristic line method mainly relied on by the traditional ditch type slag dump modeling method cannot adapt to the complex and changeable slope direction. Compared with the existing technology, the present application adopts the ditch type slag dump slag top centerline double-sided slope line intersection modeling method to construct the main ditch slag dump model and the branch ditch slag dump model, and can also merge the main ditch slag dump model and the branch ditch slag dump model based on the branch ditch and main ditch connection modeling method in the case of multiple gullies in the slag dump to obtain a multi-gully slag dump model, which can solve the problem of the fusion and intersection of the slope of the single ditch slag dump modeling project and the main ditch and branch ditch connection modeling problem of the ditch type slag dump with multiple gullies, and then achieve adaptation to the complex and changeable slope direction when creating the three-dimensional model of the slag dump.

[0113] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Fig.19 , step S30 includes steps S301 to S303:

[0114] Step S301, determining the main ditch-branch ditch junction on the slag dump modeling range line of the main ditch slag dump model;

[0115] Step S302, selecting two endpoints at the junction of the main ditch and the branch ditch to draw a starting line for branch ditch modeling;

[0116] It should be noted that if Fig. 20 As shown in FIG. 1 , two endpoints are selected on the boundary line of the waste dump near the junction of the branch ditch and the main ditch to draw the starting line for modeling the branch ditch waste dump (the connecting line between the branch ditch and the main ditch model, i.e., the starting line for modeling the branch ditch). The starting line for modeling the branch ditch is generally roughly perpendicular to the direction of the branch ditch. The software algorithm can ensure that the two endpoints are constrained within the modeling range of the main ditch waste dump to ensure seamless connection between the branch ditch waste dump model and the main ditch model in the later stage. When modeling the branch ditch waste dump, the original main ditch modeling network line within the range of the branch ditch modeling starting line is truncated to form a new main ditch modeling range line (e.g., Fig.21 shown).

[0117] Step S303, selecting a drawing starting point on the branch ditch modeling starting line, and drawing the branch ditch slag top center line from bottom to top along the branch ditch channel at the branch ditch slag dump location, wherein the drawing starting point of the branch ditch slag top center line is constrained on the branch ditch modeling starting line.

[0118] In a feasible implementation manner, the step of designing the longitudinal section of the branch ditch according to the center line of the branch ditch slag top includes: determining the coordinates of the branch ditch endpoint on the center line of the branch ditch slag top; forming the initial longitudinal section of the branch ditch based on the original ground elevation of the branch ditch and the initial design elevation of the branch ditch slag top according to the coordinates of the branch ditch endpoint; setting the branch ditch longitudinal slope grading parameters, and forming the branch ditch longitudinal section according to the branch ditch longitudinal slope grading parameters based on the initial longitudinal section of the branch ditch, wherein the branch ditch longitudinal slope grading parameters include the width of the horseway platform, the slope of the horseway platform, the slope height and the slope ratio.

[0119] It should be noted that if Fig. 22 As shown in FIG. 1 , the method for drawing the center line of the slag top of the main ditch can be referred to. After obtaining the starting line of the branch ditch modeling, the center line of the slag top of the branch ditch can be drawn. The starting point of the center line of the slag top of the branch ditch can be constrained on the starting line of the branch ditch modeling through the software algorithm to ensure that the starting point elevation is consistent with the design elevation of the main ditch modeling range line. Then, the center line of the slag top of the branch ditch can be drawn from bottom to top along the branch ditch channel at the location of the branch ditch waste dump. Then, according to the coordinates of each endpoint (except the starting point) on the center line of the slag top of the branch ditch, the original ground elevation of the branch ditch and the initial design elevation of the branch ditch (generally, the design elevation is 3 to 5 meters higher than the original ground elevation) are obtained respectively to form the initial longitudinal section of the branch ditch of the waste dump (as shown in FIG. 1 ). Fig.23 shown).

[0120] In a feasible implementation manner, the step of constructing a branch ditch waste dump model based on the branch ditch slag top centerline and the branch ditch longitudinal section by using the slag top centerline double-sided slope line intersection modeling method includes: obtaining multiple branch ditch centerline reference points on the branch ditch slag top centerline at preset intervals; drawing branch ditch cross-sectional lines on both sides of the branch ditch longitudinal section with the branch ditch centerline reference points as base points, wherein the branch ditch cross-sectional lines are parallel to the branch ditch modeling starting line; determining the branch ditch sampling point coordinates on the branch ditch cross-sectional line according to the branch ditch centerline reference points, the surface runoff convergence gradient and the sampling point spacing; obtaining the height difference between the branch ditch sampling point coordinates and the branch ditch sampling point coordinates on the ground vertical projection point, and when the height difference is less than a preset threshold, determining the branch ditch sampling point coordinates as the branch ditch ground intersection point; connecting the branch ditch ground intersection points in sequence to generate a branch ditch modeling range line; constructing the branch ditch waste dump model based on the branch ditch modeling starting line, the branch ditch modeling range line and the branch ditch cross-sectional line.

[0121] It should be noted that if Fig.24 As shown, the method of designing the main ditch longitudinal section can be referred to, and the branch ditch longitudinal slope classification parameters can be set based on the initial longitudinal section of the branch ditch. After the branch ditch longitudinal section design is completed, the branch ditch waste dump modeling process can be entered.

[0122] In the specific implementation, Fig.25 as well as Fig.26 As shown in FIG. 1 , the previously drawn modeling line connecting the main ditch and the branch ditch is used as the starting modeling line of the branch ditch waste dump. Points are selected at a certain interval on the drawn center line of the branch ditch slag top, and cross-section lines are emitted to both sides. The cross-section line of the branch ditch is controlled to be parallel to the starting modeling line of the branch ditch through the software algorithm. The method of intersecting the cross-section line of each branch ditch with the ground of the branch ditch is the same as that of the main ditch waste dump. Specifically, the center line reference point of the branch ditch slag top is used as the base point, and cross-section lines are drawn to both sides according to the set surface runoff convergence gradient. The branch ditch sampling points are obtained at a certain interval on the branch ditch cross-section line. According to the coordinates of the reference point O (X0, Y0, Z0) (where Z0 is the elevation), the cross-section slope (surface runoff convergence gradient i), and the sampling point spacing d, the coordinates (Xn, Yn, Zn) of the branch ditch sampling point Pn (where Zn is the elevation) are calculated. According to the coordinates (Xn, Yn) of the branch ditch sampling point Pn, the vertical projection point P of the branch ditch sampling point on the ground is obtained. nd The height (Z nd ), calculate the difference between Zn and Znd, and when the difference is within the specified threshold range, stop taking points on the cross-section line, that is, the cross-section line of the branch ditch is considered to intersect with the ground at this branch ditch sampling point. At this time, the branch ditch sampling point can be determined as the branch ditch ground intersection point corresponding to the branch ditch slag top centerline reference point. Finally, all branch ditch ground intersection points that intersect with the original ground are connected in sequence to generate the branch ditch waste dump modeling range line. Finally, the adjacent lines of the cross-section lines on the branch ditch starting modeling line, the branch ditch waste dump modeling range line, and the branch ditch slag top centerline are networked to complete the branch ditch slag body modeling (i.e., branch ditch waste dump model).

[0123] The present application determines the main-branch ditch junction on the slag field modeling range line of the main ditch slag field model; selects two endpoints at the main-branch ditch junction to draw the slag field modeling start line; draws the slag top center line of the slag top of the slag field from bottom to top along the slag field of the slag field, wherein the drawing starting point of the slag top center line of the slag top of the slag field is constrained on the slag field modeling start line. The drawing of the slag top center line of the slag top of the slag field can be realized quickly.

[0124] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the multi-gully waste dump modeling method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0125] This application also provides a multi-gully waste dump modeling device, please refer to Fig. 27 The multi-gully waste dump modeling device comprises:

[0126] The design module 10 is used to draw the center line of the main ditch slag top from top to bottom in the ditch at the location of the waste dump selected in the GIS environment, and design the main ditch longitudinal section according to the center line of the main ditch slag top;

[0127] A construction module 20 is used to construct a main ditch waste dump model based on the main ditch slag top center line and the main ditch longitudinal section by adopting a slag top center line double-side slope line intersection modeling method;

[0128] The design module 10 is further used to draw the center line of the branch ditch slag top from bottom to top in the ditch at the selected branch ditch slag site location based on the main ditch slag site model, and design the branch ditch longitudinal section according to the center line of the branch ditch slag top;

[0129] The construction module 20 is further used to construct a branch ditch waste dump model based on the branch ditch slag top center line and the branch ditch longitudinal section by using the intersection modeling method of the slag top center line double-side slope lines;

[0130] The merging module 30 is used to merge the main ditch waste dump model and the branch ditch waste dump model into a multi-gully waste dump model, so as to perform engineering construction based on the multi-gully waste dump model.

[0131] The multi-gully waste dump modeling device provided by the present application adopts the multi-gully waste dump modeling method in the above-mentioned embodiment, which can solve the technical problem that the slope laying method and characteristic line method mainly relied on by the traditional channel-type waste dump modeling method cannot adapt to the complex and changeable slope laying direction. Compared with the prior art, the beneficial effects of the multi-gully waste dump modeling device provided by the present application are the same as the beneficial effects of the multi-gully waste dump modeling method provided by the above-mentioned embodiment, and the other technical features in the multi-gully waste dump modeling device are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0132] The present application provides a multi-gully waste dump modeling device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the multi-gully waste dump modeling method in the above-mentioned embodiment one.

[0133] Reference below Fig.28, which shows a schematic diagram of the structure of a multi-gully waste dump modeling device suitable for implementing the embodiment of the present application. The multi-gully waste dump modeling device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig.28 The multi-gully waste dump modeling device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0134] like Fig.28 As shown, the multi-gully waste dump modeling device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM) 1004. Various programs and data required for the operation of the multi-gully waste dump modeling device are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems may be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 may allow the multi-gully waste dump modeling device to communicate wirelessly or wired with other devices to exchange data. Although the multi-gully waste dump modeling device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0135] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0136] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the multi-gully waste dump modeling method in the above-mentioned embodiment.

[0137] The present application also provides a computer program product, comprising a computer program, which implements the steps of the multi-gully waste dump modeling method as described above when executed by a processor.

[0138] The computer program product provided by the present application can solve the technical problem that the slope method and characteristic line method mainly relied on by the traditional gully-type waste dump modeling method cannot adapt to the complex and changeable slope direction. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the multi-gully waste dump modeling method provided by the above embodiment, which will not be repeated here.

[0139] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A multi-gully waste dump modeling method, characterized in that: The method comprises: Draw the center line of the main ditch slag top from top to bottom in the ditch at the location of the waste dump selected in the GIS environment, and design the main ditch longitudinal section according to the center line of the main ditch slag top; Based on the center line of the main ditch slag top and the longitudinal section of the main ditch, a main ditch abandoned slag field model is constructed by using the intersection modeling method of the double-side slope lines of the center line of the slag top; Based on the main ditch waste dump model, a branch ditch slag top centerline is drawn from bottom to top in the ditch at the selected branch ditch waste dump location, and a branch ditch longitudinal section is designed according to the branch ditch slag top centerline; Based on the center line of the slag top of the branch ditch and the longitudinal section of the branch ditch, a branch ditch abandoned slag field model is constructed by using the intersection modeling method of the double-side slope lines of the slag top center line; The main ditch waste dump model and the branch ditch waste dump model are combined into a multi-gully waste dump model, so as to carry out engineering construction based on the multi-gully waste dump model.

2. The method according to claim 1, characterized in that The step of designing the longitudinal section of the main ditch according to the center line of the main ditch slag top comprises: Determine the main trench endpoint coordinates on the main trench slag top centerline; Determine the original ground elevation of the main ditch and the initial design elevation of the slag top of the main ditch according to the coordinates of the main ditch endpoints; The initial longitudinal section of the main ditch is formed based on the original ground elevation of the main ditch and the initial design elevation of the slag top of the main ditch; The main ditch longitudinal slope grading parameters are set, and the main ditch longitudinal section is formed according to the main ditch longitudinal slope grading parameters based on the main ditch initial longitudinal section, wherein the main ditch longitudinal slope grading parameters include the horseway platform width, the horseway platform slope, the slope height and the slope ratio.

3. The method according to claim 1, characterized in that The step of constructing the main ditch abandoned slag field model based on the main ditch slag top center line and the main ditch longitudinal section by using the intersection modeling method of the slag top center line double-side slope lines comprises: Based on the center line of the main ditch slag top and the longitudinal section of the main ditch, the intersection point of the main ditch slag body surface and the original ground is determined by using the intersection modeling method of the double-side slope lines of the slag top center line, and the modeling range line of the abandoned slag field is generated according to the intersection point of the main ditch and the ground; Based on the center line of the main ditch slag top, the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall are respectively obtained, and the retaining wall model is constructed according to the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall; Based on the modeling range line of the waste dump and the retaining wall model, a main ditch waste dump model is constructed.

4. The method according to claim 3, characterized in that The steps of determining the intersection point of the main ditch with the ground based on the center line of the main ditch slag top and the longitudinal section of the main ditch by using the intersection modeling method of the double-side slope lines of the center line of the slag top, and generating the modeling range line of the abandoned slag field according to the intersection point of the main ditch with the ground include: Acquire a plurality of main ditch slag top center line reference points on the main ditch slag top center line according to preset intervals; Taking the centerline reference point of the main ditch top as the base point, draw the main ditch cross-section lines on both sides of the main ditch longitudinal section according to the surface runoff convergence gradient; Determine the coordinates of the main ditch sampling points on the main ditch cross-section line according to the main ditch centerline reference point, the surface runoff confluence gradient and the sampling point spacing; Obtaining the height difference between the coordinates of the main ditch sampling point and the vertical projection point of the coordinates of the main ditch sampling point on the ground, and when the height difference is less than a preset threshold, determining that the coordinates of the main ditch sampling point are the intersection points of the main ditch and the ground; The intersection points of the main ditch ground are connected in sequence to generate the modeling range line of the waste dump.

5. The method according to claim 3, characterized in that The steps of respectively obtaining the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the oblique line of the retaining wall and the lower edge boundary line of the retaining wall based on the center line of the main ditch slag top, and constructing a retaining wall model according to the bottom baseline of the most downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the oblique line of the retaining wall and the lower edge boundary line of the retaining wall include: The bottom baseline of the most downstream side slope of the main ditch slag body is generated by connecting the main ditch slag top centerline reference point at the most downstream main ditch centerline and the main ditch ground intersection points on both sides; The center line of the main ditch top is extended outward by a preset platform width according to the drainage slope at the most downstream main ditch center line reference point to obtain a wall back reference point, and the wall back reference point is connected with the intersection points of the main ditch ground on both sides to generate a wall back baseline; The wall back reference point is offset outward according to the top width of the retaining wall to obtain the wall surface reference point, and the wall surface reference point is connected with the intersection points of the main ditch ground on both sides to generate the wall surface baseline; On the basis of the wall back baseline and the wall surface baseline, retaining wall points are taken at the same intervals, and on the basis of the retaining wall points, retaining wall oblique lines are drawn according to the retaining wall slope. The retaining wall oblique lines are extended to intersect with the original ground. After the retaining wall oblique lines intersect with the original ground, they continue to extend downward according to the retaining wall slope and the foundation burial depth to reserve the retaining wall foundation, and finally the lowest endpoint of the retaining wall oblique lines is obtained. The lowest endpoints of multiple retaining wall oblique lines are connected to obtain the lower edge boundary line of the retaining wall, and a retaining wall model is constructed according to the bottom baseline of the downstream slope of the main ditch slag body, the wall back baseline, the wall surface baseline, the retaining wall oblique line and the lower edge boundary line of the retaining wall.

6. The method according to claim 1, characterized in that The step of drawing the center line of the branch ditch slag top from bottom to top in the ditch at the selected branch ditch slag field location based on the main ditch slag field model comprises: Determine the main-branch ditch junction on the slag dump modeling range line of the main ditch slag dump model; Select two endpoints at the junction of the main ditch and the branch ditch to draw the starting line of the branch ditch modeling; A drawing starting point is selected on the branch ditch modeling starting line, and a branch ditch slag top center line is drawn from bottom to top along the branch ditch channel at the branch ditch slag dump location, wherein the drawing starting point of the branch ditch slag top center line is constrained on the branch ditch modeling starting line.

7. The method according to claim 6, characterized in that The step of designing the longitudinal section of the branch ditch according to the center line of the slag top of the branch ditch comprises: Determine the branch ditch endpoint coordinates on the branch ditch slag top centerline; According to the branch ditch endpoint coordinates at the original ground elevation of the branch ditch and the initial design elevation of the branch ditch slag top; The initial longitudinal section of the branch ditch is formed based on the original ground elevation of the branch ditch and the initial design elevation of the slag top of the branch ditch; The branch ditch longitudinal slope grading parameters are set, and the branch ditch longitudinal section is formed according to the branch ditch longitudinal slope grading parameters based on the initial branch ditch longitudinal section, wherein the branch ditch longitudinal slope grading parameters include the horseway platform width, the horseway platform slope, the slope height and the slope ratio.

8. The method according to claim 6, characterized in that The step of constructing a branch ditch waste dump model based on the branch ditch slag top center line and the branch ditch longitudinal section by using the slag top center line double-side slope line intersection modeling method comprises: Acquire multiple branch ditch centerline reference points on the branch ditch slag top centerline according to preset intervals; Taking the branch ditch midline reference point as the base point, draw the branch ditch cross-section line on both sides on the branch ditch longitudinal section, wherein the branch ditch cross-section line is parallel to the branch ditch modeling starting line; Determine the branch ditch sampling point coordinates on the branch ditch cross-section line according to the branch ditch centerline reference point, surface runoff confluence gradient and sampling point spacing; Obtaining the height difference between the branch ditch sampling point coordinates and the vertical projection point of the branch ditch sampling point coordinates on the ground, and when the height difference is less than a preset threshold, determining the branch ditch sampling point coordinates as the branch ditch ground intersection point; The branch ditch ground intersection points are connected in sequence to generate a branch ditch modeling range line, and a branch ditch waste dump model is constructed according to the branch ditch modeling range line.

9. The method according to claim 8, characterized in that The step of constructing the branch ditch waste dump model according to the branch ditch modeling range line comprises: Based on the branch ditch modeling starting line, the branch ditch modeling range line and the branch ditch cross-section line, a branch ditch waste dump model is constructed.

10. A multi-gully waste dump modeling device, characterized in that: The device comprises: A design module is used to draw the center line of the main ditch slag top from top to bottom in the ditch at the location of the waste dump selected in the GIS environment, and design the main ditch longitudinal section according to the center line of the main ditch slag top; A construction module is used to construct a main ditch waste dump model based on the main ditch slag top center line and the main ditch longitudinal section by adopting the intersection modeling method of the slag top center line double-side slope lines; The design module is further used to draw the center line of the branch ditch slag top from bottom to top in the ditch at the selected branch ditch slag site location based on the main ditch slag site model, and design the branch ditch longitudinal section according to the center line of the branch ditch slag top; The construction module is also used to construct a branch ditch waste dump model based on the branch ditch slag top center line and the branch ditch longitudinal section by adopting the intersection modeling method of the slag top center line double-side slope lines; The merging module is used to merge the main ditch waste dump model and the branch ditch waste dump model into a multi-gully waste dump model, so as to perform engineering construction based on the multi-gully waste dump model.

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