Digital intelligent three-dimensional excavation method based on geological conditions and design concepts

Abstract

The invention provides a digital intelligent three-dimensional excavation method based on geological conditions and design concepts, the excavation method is based on a three-dimensional geological model, generalized parameters of three-dimensional excavation are generated through the three-dimensional geological model, so that a three-dimensional excavation face can be updated in real time when the three-dimensional geological model is dynamically updated, and when the generalized parameters are generated, the three-dimensional excavation face can be updated in real time. Introducing common excavation face generality of the project to unify parameters so as to generate an excavation face or a filling face commonly used in the infrastructure project; according to the method, a digital and intelligent three-dimensional excavation design scheme can be formed based on geological conditions and design concepts.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction design, and in particular to a method for digital three-dimensional excavation based on geological conditions and design concepts. Background Art

[0002] At present, in the field of infrastructure construction, there is no domestic digital three-dimensional excavation design software based on geological conditions and design concepts, and it is impossible to realize a digital excavation method based on the integration of a three-dimensional geological model and design concepts. At the same time, the existing three-dimensional excavation software generally has the disadvantages of complex modeling, low parameterization degree and low modeling efficiency. Summary of the Invention

[0003] The present invention proposes a method for digital three-dimensional excavation based on geological conditions and design concepts, which can form a digital and intelligent three-dimensional excavation design scheme based on geological conditions and design concepts.

[0004] The present invention adopts the following technical solutions.

[0005] A method for digital three-dimensional excavation based on geological conditions and design concepts, the excavation method is based on a three-dimensional geological model, generates generalized parameters for three-dimensional excavation from the three-dimensional geological model, so that when the three-dimensional geological model is dynamically updated, the three-dimensional excavation surface can be updated in real time. When generating the generalized parameters, the commonalities of common excavation surfaces in engineering are introduced to unify the parameters, so as to generate the excavation surface or filling surface commonly used in infrastructure construction projects.

[0006] The method includes the following steps; Step S1, data preparation, and the prepared data includes a dynamically updatable three-dimensional geological model, a schematic plan layout, and a baseline based on three-dimensional profile constraints; Step S2, a three-dimensional automatic excavation process based on geological conditions, automatically obtains the formation information of the three-dimensional geological model, determines the geological conditions, and forms an initial three-dimensional excavation plan based on geological conditions; Step S3, check the excavation surface of the plan in step two according to engineering requirements. If it does not meet the engineering requirements, adjust the three-dimensional coordinates of the baseline points of the excavation surface and the excavation parameters, and repeat step S2 until the excavation surface effect meets the requirements, and then generate the geological statistical information on the excavation surface, including the area and area ratio of each formation on the slope surface; Step S4, further check the excavation surface generated in step S3 according to the requirements of the safety, economy, aesthetics and construction convenience of slope excavation. If it does not meet the requirements, generate an excavation plan based on geological conditions and expert design concepts through an excavation design expert advice system. If it meets the requirements, generate the excavation surface of the engineering area and execute the subsequent step S6; Step S5: Generate a 3D excavation surface based on the expert excavation suggestions in the excavation plan in Step S4, or based on the 3D excavation plan based on geological conditions in Step S2. Step S6: Connect the excavation surface sets generated in Steps S2 and S5 in the engineering excavation area, and obtain the 3D excavation surface for the engineering area by deleting the triangular meshes outside the excavation surface boundaries. Step S7: After generating the 3D excavation surface for the engineering area, perform the calculation and processing work related to this 3D excavation surface.

[0007] In Step S1, the 3D geological model is a surface model or a volume model.

[0008] In Step S2, first, based on the formation information of the obtained 3D geological model, set the slope eluvium layer, completely weathered layer, strongly weathered layer, weakly weathered layer, and excavation slope ratio. Then set the berm parameters, including berm elevation, berm width, and whether the berm is parallel to the excavation baseline; set whether to use elevation restrictions. Then set whether to use surface model restrictions for the slope generation parameters, specifically including: setting whether to perform shear processing on the overlapping position of the slope in the clockwise direction between two line segments of the excavation baseline; setting the method of using extended intersection or adding new surfaces for the slopes generated by the two line segments in the counterclockwise direction; setting whether to retain the excavation surface framework; setting to generate grids or 3D polylines. After completing the setting of the slope generation parameters, generate a 3D excavation surface.

[0009] The method for generating a 3D excavation surface is as follows: First, divide the baseline into multiple segments. According to the 3D geological model and the parametrically set excavation slope ratio and berm parameters, make the two vertices of each segment represent two profiles. The 3D rays formed by the starting slope points and slope ratios of each level on each profile intersect with the 3D strata, so that the obtained 3D points can be given more attributes, including the type of the point, the starting slope direction of the point, the formation information below the point, and the formation information above the point. After processing the overlapping method between the two baselines and generating the new 3D point set information, classify and identify the set of slope feature points generated by multiple profiles. According to the attributes of the same formation or the same level of berm, organically connect the point sets on two adjacent profiles to form the 3D excavation surface between the two profiles. Finally, connect all the excavation surfaces to form the initial 3D excavation surface based on geological conditions.

[0010] In Step S4, the excavation plan based on geological conditions and expert design concepts includes slope ratio, slope height, berm design plan, and the overlapping method of the slopes between the base line segments.

[0011] When using expert excavation suggestions to generate the 3D excavation surface in Step S5, if an elevation-based excavation plan is adopted, then select elevation-based 3D parametric excavation. The three-dimensional parametric excavation process based on elevation includes setting slope generation parameters, specifically including: setting the excavation slope ratio at different elevations; setting berm parameters, and the setting content includes berm elevation, berm width, and whether the berm is parallel to the excavation baseline; setting whether to adopt elevation limit; setting whether to adopt surface model limit; setting whether to perform shear treatment on the overlapping position of the slope in the clockwise direction between the two line segments of the excavation baseline; setting the method of extending and intersecting or adding new surfaces to the slopes generated by the two line segments in the counterclockwise direction; setting whether to retain the excavation surface framework; setting to generate a mesh or 3D polyline.

[0012] In step S5, after completing the setting of slope generation parameters, a three-dimensional excavation surface can be generated; the generation method is specifically as follows: First, parameterize and set the excavation slope ratio and berm parameters according to different elevation parameters, so that the two vertices of each segment represent two profiles. The three-dimensional rays formed by the starting slope points and slope ratios of each level on each profile intersect with the elevation surface, so that the obtained three-dimensional points have multiple attributes, including the type of point, the starting slope direction of the point, the slope ratio information below the point, and the slope ratio information above the point. At the same time, handle the overlapping method between the two baselines and generate new point set information, then classify and identify the set of slope feature points generated by numerous profiles, and connect the point sets on adjacent two profiles organically according to the attributes of the same elevation or the same level of berm, to form a three-dimensional excavation surface between the two profiles, and finally connect all the excavation surfaces to form an initial three-dimensional excavation surface based on the design concept or expert opinion.

[0013] In step S6, the set of excavation surfaces generated in step S2 and step S5 is connected using the triangulation algorithm of edge-constrained Delauney triangulation. Through the boundary-outlier removal algorithm, the triangulation outside the excavation surface boundary is automatically deleted to generate a three-dimensional excavation surface for the engineering area, and the excavation surface includes the filling surface.

[0014] In step S6, a software is used to execute the process of generating the three-dimensional excavation surface, and the quadtree and Delauney convex hull algorithms are applied to improve the operation speed of the processing process.

[0015] In step S7, the calculations and processing work related to this three-dimensional excavation surface includes the following content: 1) Automatically obtain the opening line and berm edge line; 2) Generate an excavation drawing and a plane layout drawing; 3) Generate an excavation profile; 4) Obtain the total excavation volume, the total backfill volume, and the graded excavation volume of earth and stone; 5) Automatically count the numerical value and proportion of the area of each stratum in the excavation surface, providing a data basis for calculating the support project volume; 6) Provide a three-dimensional excavation model basis for the digital and intelligent application of slope support; 7) Dynamically update the excavation and filling models in the engineering area during the subsequent design stage.

[0016] The advantages of the present invention are as follows: 1) It can perform three-dimensional parametric excavation based on geological conditions: Regarding the three-dimensional geological model as a generalized parameter for three-dimensional excavation, when the three-dimensional geological model is dynamically updated, the three-dimensional excavation surface can be updated in real time.

[0017] 2) It can generalize the commonalities of most excavation surfaces in engineering, adopt unified parametric settings, and generate most types of excavation surfaces or filling surfaces in the field of infrastructure construction.

[0018] 3) During the generation process of the three-dimensional excavation surface, it can apply the quadtree and Delauney convex hull algorithms to improve the operation speed of the software.

[0019] 4) It can apply the digital intelligent decision-making system to software development to improve the degree of automation and design quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments: Attached Figure 1 is a schematic flow chart of the present invention; Attached Figure 2 is a schematic diagram of the three-dimensional excavation plan in step S2; Attached Figure 3 is a schematic diagram of the three-dimensional excavation surface in step S5; Attached Figure 4 is a schematic diagram of a three-dimensional excavation example of the present invention for the dam foundation of a concrete gravity dam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] As shown in the figure, a method for digital intelligent three-dimensional excavation based on geological conditions and design concepts. The excavation method is based on a three-dimensional geological model, generates a generalized parameter for three-dimensional excavation with the three-dimensional geological model, so that when the three-dimensional geological model is dynamically updated, the three-dimensional excavation surface can be updated in real time. When generating the generalized parameter, the commonalities of common excavation surfaces in engineering are introduced to unify the parameters, so as to generate common excavation surfaces or filling surfaces in infrastructure projects.

[0022] The method includes the following steps; Step S1, data preparation. The prepared data includes a dynamically updatable three-dimensional geological model, a schematic diagram of the design plane layout, and a baseline based on three-dimensional profile constraints; Step S2, a three-dimensional automatic excavation process based on geological conditions, automatically obtaining the formation information of the three-dimensional geological model, determining the geological conditions, and forming an initial three-dimensional excavation plan based on geological conditions; Step S3: Check the excavation face of the solution in Step 2 against the engineering requirements. If it does not meet the engineering requirements, adjust the three-dimensional coordinates of the baseline points of the excavation face and the excavation parameters, and repeat Step S2 until the effect of the excavation face meets the requirements. Then generate the geological statistical information on the excavation face, including the area and area ratio of each stratum on the slope surface. Step S4: Further check the excavation face generated in Step S3 against the requirements in terms of the safety, economy, aesthetics, and construction convenience of the slope excavation. If it does not meet the requirements, generate an excavation solution based on the geological conditions and expert design concepts through the excavation design expert advice system. If it meets the requirements, generate the excavation face of the engineering area and execute the subsequent Step S6. Step S5: Generate a three-dimensional excavation face based on the expert excavation advice in the excavation solution in Step S4 or based on the three-dimensional excavation solution based on geological conditions in Step S2. Step S6: Connect the excavation face sets generated in Step S2 and Step S5 in the engineering excavation area, and obtain the three-dimensional excavation face for the engineering area by deleting the triangulation outside the excavation face boundary. Step S7: After generating the three-dimensional excavation face for the engineering area, perform the calculations and processing work related to this three-dimensional excavation face.

[0023] In Step S1, the three-dimensional geological model is a surface model or a volume model.

[0024] In Step S2, first set the slope eluvium layer, completely weathered layer, strongly weathered layer, weakly weathered layer, and excavation slope ratio based on the stratum information of the obtained three-dimensional geological model. Then set the berm parameters, including berm elevation, berm width, and whether the berm is parallel to the excavation baseline; set whether to use elevation restrictions. Then set whether to use surface model restrictions for the slope generation parameters, specifically including: setting whether to perform shear processing on the overlapping position of the slope in the clockwise direction between two line segments of the excavation baseline; setting the method of using extended intersection or newly added surface for the slope surface generated by the two line segments in the counterclockwise direction; setting whether to retain the excavation face framework; setting to generate a grid or three-dimensional polyline. After completing the setting of the slope generation parameters, generate a three-dimensional excavation face.

[0025] The method for generating a three-dimensional excavation surface is as follows: First, the baseline is finely divided into multiple segments. According to the three-dimensional geological model and the parametrically set excavation slope ratio and berm parameters, the two vertices of each segment represent two profiles. The three-dimensional rays formed by the starting slope points and slope ratios at each level on each profile intersect with the three-dimensional strata, so that the obtained three-dimensional points can be given more attributes, including the type of the point, the starting slope direction of the point, the strata information below the point, and the strata information above the point. After processing the lap joint method between the two baselines and generating the new three-dimensional point set information, the slope feature point sets generated by numerous profiles are classified and identified. According to the attributes of the same strata or the same level of berm, the point sets on two adjacent profiles are organically connected to form the three-dimensional excavation surface between the two profiles. Finally, all the excavation surfaces are connected to form the initial three-dimensional excavation surface based on geological conditions.

[0026] In step S4, the excavation plan based on geological conditions and expert design concepts includes the slope ratio of the slope, the height of the slope, the berm design plan, and the lap joint method of the slopes between the base line segments.

[0027] When using expert excavation suggestions in step S5 to generate the three-dimensional excavation surface, if an elevation-based excavation plan is adopted, then elevation-based three-dimensional parametric excavation is selected. The elevation-based three-dimensional parametric excavation process includes setting slope generation parameters, specifically including: setting the excavation slope ratio at different elevations; setting berm parameters, and the setting content includes berm elevation, berm width, and whether the berm is parallel to the excavation baseline; setting whether to adopt elevation restrictions; setting whether to adopt surface model restrictions; setting whether to perform shear processing on the overlapping position of the slopes in the clockwise direction between the two line segments of the excavation baseline; setting the method of using extension intersection or adding a new surface for the slopes generated by the two line segments in the counterclockwise direction; setting whether to retain the excavation surface framework; setting to generate a grid or three-dimensional polyline.

[0028] After completing the setting of slope generation parameters in step S5, the three-dimensional excavation surface can be generated. The generation method is specifically as follows: First, according to the parametrically set excavation slope ratio and berm parameters at different elevations, the two vertices of each segment represent two profiles. The three-dimensional rays formed by the starting slope points and slope ratios at each level on each profile intersect with the elevation surface, so that the obtained three-dimensional points have multiple attributes, including the type of the point, the starting slope direction of the point, the slope ratio information below the point, and the slope ratio information above the point. At the same time, the lap joint method between the two baselines is processed well and new point set information is generated. Then, the slope feature point sets generated by numerous profiles are classified and identified. According to the attributes of the same elevation or the same level of berm, the point sets on two adjacent profiles are organically connected to form the three-dimensional excavation surface between the two profiles. Finally, all the excavation surfaces are connected to form the initial three-dimensional excavation surface based on the design concept or expert opinion.

[0029] In step S6, the excavation surface sets generated in steps S2 and S5 are connected using the triangulation algorithm for edge-constrained Delauney triangulation. Through the boundary exclusion algorithm, the triangulation outside the excavation surface boundary is automatically deleted to generate a three-dimensional excavation surface for the project area, and the excavation surface includes the filling surface.

[0030] In step S6, software is used to execute the three-dimensional excavation surface generation process, and the quadtree and Delauney convex hull algorithms are applied to improve the operation speed of the processing process.

[0031] In step S7, the calculations and processing work related to this three-dimensional excavation surface includes the following: 1) Automatically obtain the opening line and the edge line of the bench; 2) Generate the excavation drawing and the plan layout drawing; 3) Generate the excavation profile drawing; 4) Obtain the total excavation volume, the total backfill volume, and the graded excavation volume of the earth and rock; 5) Automatically count the area value and the area proportion of each stratum in the excavation surface to provide a data basis for calculating the support engineering quantity; 6) Provide a three-dimensional excavation model basis for the digital and intelligent application of slope support; 7) Dynamically update the excavation and filling models of the project area in the subsequent design stage.

[0032] Example: The software algorithm process and principle adopted in this example are as follows: Step (1) Data preparation Data preparation includes a dynamically updatable three-dimensional geological model (surface model or volume model), a preliminary design plan layout sketch, a baseline based on three-dimensional profile constraints, etc. After the data is prepared, step (2) is executed.

[0033] Step (2) Three-dimensional automated excavation process based on geological conditions: Automatically obtain the formation information of the three-dimensional geological model, and set the excavation slope ratios for the slope eluvium layer, completely weathered layer, strongly weathered layer, weakly weathered layer... Set the bench parameters, including bench elevation, bench width, and whether the bench is parallel to the excavation baseline; Set whether to use elevation limit; Set whether to use surface model limit; Set whether to perform shear treatment on the overlapping position of the slopes in the clockwise direction between the two line segments of the excavation baseline; Set the method of using extended intersection or newly added surface for the slopes generated by the two line segments in the counterclockwise direction; Set whether to retain the excavation surface framework; Set to generate grids or three-dimensional polylines, etc. After setting the slope generation parameters, a three-dimensional excavation surface can be generated. Generation principle: The baseline is divided into multiple segments. According to the three-dimensional geological model and the parameterized excavation slope ratios, bench and other parameters, the two vertices of each segment represent two profiles. The three-dimensional rays formed by the starting slope points and slope ratios of each level on each profile intersect with the three-dimensional formation. The obtained three-dimensional points are given numerous attributes, including the type of the point, the starting slope direction of the point, the formation information below the point, the formation information above the point, etc. At the same time, handle the overlapping method between the two baselines and generate new point set information. Classify and identify the slope feature point sets generated by numerous profiles. According to the attributes of the same formation or the same level of bench, organically connect the point sets on the adjacent two profiles to form a three-dimensional excavation surface between the two profiles. Connect all the excavation surfaces to form an initial three-dimensional excavation surface based on geological conditions.

[0034] Step (3) Check the excavation surface generated in step (2). If it does not meet the requirements, adjust the three-dimensional coordinates of the baseline points, excavation parameters, etc., and repeat step (2) until the excavation surface effect meets the requirements, and generate the geological statistical information on the excavation surface, including the area and area ratio of each formation on the slope surface, etc.

[0035] Step (4) Check the excavation surface generated in step (3). Considering factors such as the safety, economy, aesthetics, and construction convenience of slope excavation, if it meets the requirements, generate an excavation surface for the project area and execute step (6). If it does not meet the above requirements, select the excavation design expert advice system to intelligently generate an excavation plan based on geological conditions and expert design concepts, including slope ratios, slope heights, bench design plans, overlapping methods of slopes between baseline segments, etc.

[0036] Expert excavation advice formed in step (4): 1) If the elevation-based excavation plan is adopted, then select the elevation-based three-dimensional parametric excavation. Elevation-based three-dimensional parametric excavation process: Set the excavation slope ratios at different elevations; Set the berm parameters, including berm elevation, berm width, and whether the berm is parallel to the excavation baseline; Set whether to use elevation restrictions; Set whether to use surface model restrictions; Set whether to perform shear processing on the overlapping position of the slopes in the clockwise direction between the two line segments of the excavation baseline; Set the method of using extended intersection or newly added surfaces for the slopes generated by the two line segments in the counterclockwise direction; Set whether to retain the excavation surface framework; Set to generate grids or three-dimensional polylines, etc. After setting the slope generation parameters, the three-dimensional excavation surface can be generated. Generation principle: According to the excavation slope ratios, berms and other parameters parametrically set at different elevations, the two vertices of each section represent two profiles. The three-dimensional rays formed by the starting slope points and slope ratios at each level on each profile intersect with the elevation surface. The obtained three-dimensional points are given numerous attributes, including the type of the point, the starting slope direction of the point, the slope ratio information below the point, the slope ratio information above the point, etc. At the same time, handle the lap method between the two baselines and generate new point set information. Classify and identify the set of slope feature points generated by numerous profiles. According to the attributes of the same elevation or the same level of berm, connect the point sets on the adjacent two profiles organically to form the three-dimensional excavation surface between the two profiles. Connect all the excavation surfaces to form the initial three-dimensional excavation surface based on the design concept or expert opinions.

[0037] 2) If the three-dimensional excavation plan based on geological conditions is adopted, execute step (2).

[0038] Step (6) In the engineering excavation area, connect the set of excavation surfaces generated in step (2) and step (5) using the mesh generation algorithm of the edge-constrained Delauney triangulation. Through the boundary-outlier removal algorithm, automatically delete the triangulation outside the excavation surface boundary, and the three-dimensional excavation surface (including the filling surface) of the engineering area is obtained.

[0039] Step (7) After generating the three-dimensional excavation surface, the following automated work can be carried out subsequently: 1) Automatically obtain the opening line and berm edge line; 2) Generate the excavation drawing and the plane layout drawing; 3) Generate the excavation profile drawing; 4) Obtain the total excavation volume, the total backfill volume, and the graded earthwork excavation volume; 5) Automatically count the area value and area proportion of each stratum in the excavation surface to provide a data basis for calculating the support engineering volume; 6) Provide a three-dimensional excavation model basis for the digital and intelligent application of slope support; 7) Facilitate the dynamic update of the excavation and filling models in the engineering area during the subsequent design stage, etc.

Claims

1. A method for digital three-dimensional excavation based on geological conditions and design concepts, characterized by: The excavation method is based on a three-dimensional geological model, and uses the three-dimensional geological model to generate generalized parameters of three-dimensional excavation, so that the three-dimensional excavation surface can be updated in real time when the three-dimensional geological model is dynamically updated. When generating the generalized parameters, the commonalities of common excavation surfaces in the project are introduced to unify the parameters, so as to generate excavation surfaces or filling surfaces commonly used in infrastructure projects.

2. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 1 is characterized in that: The method comprises the following steps: Step S1, data preparation, the prepared data includes a dynamically updateable three-dimensional geological model, a design plan layout sketch, and a baseline based on three-dimensional section constraints; Step S2: Based on the three-dimensional automated excavation process of geological conditions, the stratigraphic information of the three-dimensional geological model is automatically obtained, the geological conditions are determined, and an initial three-dimensional excavation plan based on the geological conditions is formed; Step S3, verifying the excavation surface of the solution in step 2 according to the engineering requirements. If it does not meet the engineering requirements, adjusting the three-dimensional coordinates of the baseline points of the excavation surface and the excavation parameters, and repeating step S2 until the excavation surface effect meets the requirements, and then generating geological statistical information on the excavation surface, including the area and area proportion of each stratum on the slope surface; Step S4: further verify the excavation surface generated in step S3 based on the requirements of safety, economy, aesthetics and construction convenience of slope excavation. If the requirements are not met, an excavation plan based on geological conditions and expert design concepts is generated through the excavation design expert suggestion system. If the requirements are met, the excavation surface of the project area is generated and the subsequent step S6 is executed; Step S5, generating a three-dimensional excavation surface based on the expert excavation suggestion in the excavation plan in step S4, or based on the three-dimensional excavation plan based on geological conditions in step S2; Step S6, connecting the excavation surface sets generated in step S2 and step S5 in the engineering excavation area, and obtaining a three-dimensional excavation surface for the engineering area by deleting the triangulated mesh outside the excavation surface boundary; Step S7: After generating the three-dimensional excavation surface for the engineering area, perform calculation and processing work related to the three-dimensional excavation surface.

3. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 2 is characterized by: In step S1, the three-dimensional geological model is a surface model or a volume model.

4. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 3 is characterized by: In step S2, the slope residual layer, the fully weathered layer, the strongly weathered layer, the weakly weathered layer, and the excavation slope ratio are first set by using the stratigraphic information of the three-dimensional geological model; Then set the parameters of the bridleway, including the bridleway elevation, bridleway width, whether the bridleway is parallel to the excavation baseline, and whether to use elevation restrictions; Then set whether the slope generation parameters adopt the surface model restriction, including: setting whether the overlapping position of the clockwise slope between the two segments of the excavation baseline is sheared; setting the slope surface generated by the two anti-clockwise segments to adopt the method of extending the intersection or adding a new surface; setting whether to retain the excavation surface framework; setting to generate a grid or a three-dimensional polyline; After completing the slope generation parameter settings, generate a three-dimensional excavation surface.

5. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 4 is characterized in that: The method for generating a three-dimensional excavation surface is as follows: firstly, the baseline is differentiated into multiple segments, and according to the three-dimensional geological model and the excavation slope ratio and the bridleway parameters set by the parameterization, the two vertices of each segment represent two sections, and the three-dimensional rays formed by each level of the starting point and the slope ratio on each section intersect with the three-dimensional stratum, so that the obtained three-dimensional points can be given more attributes, including the type of the point, the starting direction of the point, the stratum information below the point, and the stratum information above the point. After processing the overlap mode between the two baselines and generating new three-dimensional point set information, the slope feature point sets generated by many sections are classified and identified, and according to the attributes of the same stratum or the same level of bridleway, the point sets on the two adjacent sections are organically connected to form a three-dimensional excavation surface between the two sections, and finally all the excavation surfaces are connected to form an initial three-dimensional excavation surface based on geological conditions.

6. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 3 is characterized by: In step S4, the excavation plan based on geological conditions and expert design concepts includes slope ratio, slope height, bridleway design plan, and overlap method of slopes between baseline segments.

7. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 3 is characterized by: Step S5 generates a three-dimensional excavation surface. If the expert excavation suggestion is used, if the elevation-based excavation scheme is adopted, the elevation-based three-dimensional parametric excavation is selected; The elevation-based three-dimensional parametric excavation process includes setting slope generation parameters, specifically: setting excavation slope ratios at different elevations; setting horseway parameters, including horseway elevation, horseway width, and whether the horseway is parallel to the excavation baseline; setting whether to use elevation restrictions; setting whether to use surface model restrictions; setting whether to shear the overlapping positions of the clockwise slopes between the two line segments of the excavation baseline; setting the slope surface generated by the two counterclockwise line segments to adopt the method of extending the intersection or adding a new surface; setting whether to retain the excavation surface framework; setting to generate a grid or a three-dimensional polyline.

8. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 3 is characterized by: Step S5 generates a three-dimensional excavation surface after completing the setting of the slope generation parameters; the generation method is specifically as follows: first, the excavation slope ratio and the bridleway parameters are parameterized according to different elevations, so that the two vertices of each section represent two sections, and the three-dimensional rays formed by each level of the starting point and the slope ratio on each section intersect with the elevation surface, so that the obtained three-dimensional points have multiple attributes, including the type of point, the starting direction of the point, the slope ratio information below the point, and the slope ratio information above the point. At the same time, the overlap method between the two baselines is processed and new point set information is generated, and then the slope feature point sets generated by many sections are classified and identified. According to the attributes of the same elevation or the same level of bridleway, the point sets on the two adjacent sections are organically connected to form a three-dimensional excavation surface between the two sections, and finally all the excavation surfaces are connected to form an initial three-dimensional excavation surface based on the design concept or expert opinion.

9. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 3 is characterized by: In step S6, the excavation surface sets generated in step S2 and step S5 are connected by using the edge-constrained Delauney triangulation algorithm, and the triangulation outside the excavation surface boundary is automatically deleted by the boundary elimination algorithm to generate a three-dimensional excavation surface for the engineering area, and the excavation surface includes the filling surface; In step S6, the three-dimensional excavation surface generation process is executed by software, and the quadtree and Delauney convex hull algorithms are applied to improve the computing speed of the processing process.

10. The method of digital three-dimensional excavation based on geological conditions and design concepts according to claim 3, characterized in that: In step S7, the calculation and processing work related to the three-dimensional excavation surface includes the following contents: 1) Automatically obtain the opening line and the edge line of the bridleway; 2) Generate excavation drawings and floor plan; 3) Generate excavation profile; 4) Obtain the total excavation volume, total backfill volume, and graded earthwork excavation volume; 5) Automatically count the area value and area proportion of each stratum in the excavation surface to provide a data basis for calculating the support engineering quantity; 6) Provide a three-dimensional excavation model foundation for the digital application of slope support; 7) Dynamically update the excavation and filling models of the project area in the subsequent design stage.

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