A highway reconstruction and expansion pavement splicing and widening automatic calculation method based on a multi-layer three-dimensional model

Abstract

The application discloses a kind of highway reconstruction and extension pavement splicing wide automatic calculation method based on multilayer three-dimensional model, including extracting old road pavement control point data;With AutoCAD Civil 3D constructs old road pavement surface model;Road plane, longitudinal section and cross slope design results are converted into the road object supported by AutoCAD Civil 3D;Build highway reconstruction and extension pavement splicing wide design scheme selection mathematical model;With component editor, parameterized component is prepared;Calculate scheme selection mathematical model each parameter data, divide reconstruction and extension pavement calculation paragraph;For each paragraph, select corresponding assembly, create multilayer three-dimensional model;By setting sampling line and material list, automatically extract multilayer three-dimensional model each part data, finally obtain reconstruction and extension pavement statistics engineering quantity.The application can realize the automatic statistics calculation of highway reconstruction and extension pavement splicing wide engineering quantity, and well meet the calculation demand of reconstruction and extension highway pavement engineering quantity.

Description

Technical Field

[0001] This invention relates to the field of highway reconstruction and expansion, and in particular to an automatic method for calculating the width of road surface in highway reconstruction and expansion based on a multi-layer three-dimensional model. Background Technology

[0002] With the rapid development of my country's economy, highway reconstruction and expansion projects are increasing. Among these, the calculation of widening work for reconstructed and expanded pavements is extremely challenging, necessitating a reasonable and feasible method to address the existing problems. Firstly, the design of reconstructed and expanded pavement schemes is influenced by numerous factors, including horizontal spacing, vertical spacing, and cross slope differences. Furthermore, when the route station is different, these three factors can combine flexibly to produce various schemes, resulting in high flexibility and complexity in selecting matching widening schemes for different road sections. Secondly, the average cross-section method is currently commonly used to calculate the widening work volume of reconstructed and expanded pavements. The cross-section spacing is generally taken as 10-20m, and the accuracy of the existing road surface is controlled by two elevation points: the route design elevation and the inner side of the hard shoulder (outer side of the curb). This results in relatively poor accuracy in the calculation of the work volume. Improving the calculation accuracy by reducing the cross-section spacing or increasing... Increasing the density of control points on the old road, using current manual quantity calculation methods as an example, would result in an exponential increase in workload, making it objectively impossible to implement. Finally, the most difficult part of calculating the widening work in the reconstruction and expansion project is the milling work. Since milling often occurs in the surface layer or even the upper layer of the road, with a thickness of around 10cm, high calculation accuracy is required. Problems such as excessively large calculation section spacing and difficulty in accurately drawing milling line positions mean that the current average section method cannot well adapt to the flexible and varied nature of milling work quantities as they change with station numbers. The lack of a relatively accurate method for calculating milling work quantities also hinders the recycling of old asphalt. Therefore, this method establishes a mathematical model for scheme selection, quickly constructing a high-precision multi-layer three-dimensional model of the old road surface, the structural layers of the reconstruction and expansion road, and the milled surface model, supporting the accurate calculation of the widening work quantity for the reconstruction and expansion road. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention aims to provide an automatic quantity calculation method for road surface widening in highway reconstruction and expansion based on a multi-layer three-dimensional model. This method innovatively solves the problems of high complexity in matching and selecting road widening schemes and road sections, poor accuracy in calculating engineering quantities, and difficulty in calculating milling quantities. It can realize the automatic statistical calculation of the engineering quantities of road surface widening schemes in highway reconstruction and expansion, and well meet the calculation needs of road surface engineering quantities in reconstruction and expansion.

[0004] To achieve the above objectives, the technical solution adopted by this invention is as follows: an automatic quantity calculation method for road surface width expansion in highway reconstruction and widening based on a multi-layer three-dimensional model, comprising the following steps:

[0005] S1. Extract the control point data of the old road surface based on the project topographic map or 3D laser scanning data;

[0006] S2. Import the control point data of the old road surface into AutoCAD Civil 3D, construct the surface, and obtain the surface model of the old road surface.

[0007] S3. Convert the road reconstruction and expansion design data of JSL-Route Expert System, extract the design data of road plan, longitudinal profile and cross slope, and construct road objects supported by AutoCAD Civil 3D;

[0008] S4. To address the problem of selecting road surface widening schemes for highway reconstruction and expansion, a mathematical model for scheme selection is constructed.

[0009] S5. Select a mathematical model based on the road surface widening scheme, and compile parametric components in the component editor;

[0010] S6. Calculate the specific data of each parameter of the mathematical model for the selected scheme, including the horizontal widening data, the longitudinal overlay data and the cross slope adjustment data, and divide the road surface reconstruction and expansion calculation sections.

[0011] S7. Select the appropriate assembly for each section of the road surface to be reconstructed and expanded, and create a multi-layer 3D model.

[0012] S8. Automatically extract the area and volume data of each part of the multi-layer 3D model through sampling lines and material list, and obtain the engineering quantity.

[0013] Optionally, in step S1, the topographic map has an accuracy higher than 1:2000, and the old road surface control point data comes from the elevation points or contour lines accurately measured within the old road area; the three-dimensional laser scanning data is point cloud data collected by airborne radar, from which point cloud data within the old road surface area is extracted as the old road surface control points; the old road surface control point data is stored in the form of point coordinates (x,y,z).

[0014] Optionally, in step S2, the specific method is as follows:

[0015] (1) Create a new surface in AutoCAD Civil 3D and define its name;

[0016] (2) Open the surface definition, add the control point data of the old road surface, construct the surface, and obtain the surface model of the old road surface.

[0017] Optionally, in step S3, the JSL-Route Expert System obtains the plan, longitudinal profile, and cross slope design data of the new road, and the plan and longitudinal profile fitting data of the old road, and constructs a road object supported by AutoCAD Civil 3D through data transformation.

[0018] Optionally, in step S4, a mathematical model for scheme selection is established based on the influencing factors of the scheme, as shown in formula (1):

[0019] FA = {PM, ZM, HP} Formula (1)

[0020] In the formula: FA is the road widening design scheme for road reconstruction and expansion; PM is the horizontal widening scheme; ZM is the longitudinal overlay scheme; HP is the cross slope adjustment scheme, as detailed below:

[0021] (1) Parameters of planar splicing scheme

[0022] It includes three parameters, as shown in formula (2), namely A1 double-sided splicing width, A2 splicing width transition, and A3 single-sided splicing width;

[0023]

[0024] In the formula: Δs is the horizontal distance between the new and old roads; i and j are the threshold values ​​for determining double-sided and single-sided widening, respectively;

[0025] The width transition is further subdivided into various planar width transition cases based on the Δs value, as shown in formula (3);

[0026]

[0027] In the formula: a is the selection parameter for the splicing transition scheme, m is the splicing judgment limit value within the transition section, and the meanings of the other parameters are the same as above;

[0028] (2) Parameters of the longitudinal overlay scheme

[0029] It includes two parameters, as shown in formula (4), namely, B1 longitudinal elevation and B2 longitudinal excavation;

[0030]

[0031] In the formula: Δh is the elevation difference between the new and old roads;

[0032] Based on the value of Δh, various schemes can be further subdivided, such as formula (5) and formula (6).

[0033]

[0034]

[0035] In the formula: b is the selection parameter for longitudinal elevation and longitudinal excavation schemes, k and j are the judgment threshold values ​​for longitudinal paving subdivision schemes, and the meanings of the other parameters are the same as above;

[0036] (3) Cross slope adjustment scheme parameters

[0037] It includes two parameters, as shown in formula (7), namely C1 cross slope reverse adjustment and C2 cross slope same direction adjustment;

[0038]

[0039] In the formula: Δh1 and Δh2 are the elevation differences between the new and old roads at the near and far ends of the old road centerline, respectively;

[0040] The mathematical model for the above scheme selection specifies the parameters that affect the scheme selection from different dimensions. Through the combination of multiple parameters, the corresponding design scheme for widening and reconstructing the road surface is obtained.

[0041] Optionally, in step S5, considering the spatial relationship between the new and old roads in the project, a mathematical model is selected based on the scheme in step S4, the types of components to be written are determined, and parametric components are created using a component editor. These include planar width determination components, longitudinal overlay determination components, cross slope adjustment determination components, and pavement widening design scheme components for road reconstruction and expansion. The method for creating these components is as follows:

[0042] (1) Set target parameters for the old road surface, the width extension line and the splicing joint position to determine the positional relationship between the reconstructed and expanded road surface and the old road, the width extension boundary and the calculation boundary between the new construction and the overlay of the reconstructed and expanded road surface;

[0043] (2) Based on the positional relationship of each structural layer in the road widening design scheme, use points, lines and surfaces to describe each structural part, set its logical relationship with the target parameters, and set the input and output parameters of the component;

[0044] (3) Add structural layer code to each structural layer; add line code to the milling interface.

[0045] Optionally, in step S6, the components compiled in step S5 are imported into AutoCAD Civil 3D to create an assembly. The specific segment data for each parameter in the mathematical model of the selected scheme are calculated to further divide the road surface quantity calculation segments. The specific method is as follows:

[0046] (1) Open the tool palette in AutoCAD Civil 3D, define the name, and then import the pre-compiled part;

[0047] (2) Create an assembly in the design creation process, define a name, draw marker points in the drawing area, and select the parts to complete the assembly creation;

[0048] (3) Using the plane width discrimination component, the coordinates of the center lines of the new and old roads at the same cross section are obtained at a certain sampling interval to calculate Δs, and the starting and ending station numbers of the plane width division interval are obtained.

[0049] (4) Using the longitudinal overlay discrimination component, at a certain sampling interval, obtain the elevation values ​​of the new and old road longitudinal control points at the same cross section to calculate Δh, and obtain the starting and ending station numbers of the longitudinal overlay section;

[0050] (5) Using the cross slope adjustment discrimination component, at a certain sampling interval, take the near end and far end elevation values ​​and horizontal distance of the old road centerline at the same cross section of the old road, calculate the cross slope of the old road surface and Δh1, Δh2, and obtain the starting and ending station numbers of the cross slope adjustment interval;

[0051] (6) Divide the entire design line into sections based on the horizontal width, longitudinal paving, and cross slope adjustment sections.

[0052] Optionally, in step S7, based on the segmentation data of the entire line in step S6, the corresponding assembly is selected to create a multi-layer three-dimensional model. The specific method is as follows:

[0053] (1) Create a road in AutoCAD Civil 3D, and select the horizontal alignment and longitudinal profile of the new road;

[0054] (2) Select road characteristics, set road parameters, add areas to the road according to the segment data divided in step S6 and set the start and end station numbers, and select the corresponding assembly;

[0055] (3) Set the target and step size for each area, and generate the structural layer model of each road surface to be reconstructed and expanded;

[0056] (4) Select road characteristics, select surface in sequence, create road surface, set connection data type, specify code as line code of milling interface, create surface, and obtain milling surface model of road widening scheme for reconstruction and expansion.

[0057] Optionally, in step S8, the multi-layer three-dimensional model data of the road widening and reconstruction scheme is collected using sampling lines, and the material is set to automatically extract the engineering quantity data of each layer. The specific method is as follows:

[0058] (1) Set up sampling lines in AutoCAD Civil 3D, and set the new road plane line position and define the sampling line name in sequence;

[0059] (2) Set the sampling data source to a multi-layer three-dimensional model, including the old road surface model, the milled surface model, and the structural layer model of the reconstructed and expanded road surface;

[0060] (3) Set the sampling line grouping sampling width and sampling rules to obtain multiple sampling lines within a certain range;

[0061] (4) Set the sampling line grouping characteristics and set the material list;

[0062] (5) Select to import another rule, select to edit the current rule or create a new rule, and set the corresponding material list for new road surface, overlay road surface and milled road surface respectively;

[0063] (6) Add new materials to the list of newly built roads and overlay roads, set the earthwork type to structure, and add structural layers for each part of the reconstructed and expanded road.

[0064] (7) Add a new material to the milled pavement list, set the earthwork type to excavation, add a sub-standard, add the old pavement surface model inside and set it to the bottom, add the milled surface model and set it to the top.

[0065] (8) Select the analysis panel, select the volume report, and set the new road plane alignment, sampling line grouping, and material list in sequence. When the output is a newly built road or overlay road, and it is a structural material, select the Select Material.xsl style sheet; when the output is a milled road, and it is an earthwork material, select the earthwork.xsl style sheet to automatically complete the quantity statistics calculation.

[0066] As described above, to address the complex problem of scheme adaptation for different road sections, this invention establishes a progressive mathematical model for scheme selection in steps S4 and S6, calculating parameters to match road sections and schemes. To address the problem of poor accuracy in quantity calculation, steps S1 and S8 improve accuracy in terms of the accuracy of old roads and the calculation of cross-sectional spacing, respectively. To address the difficulty in calculating milling quantities, steps S5 and S7 utilize a component editor, adding code and then establishing a milling surface model to calculate milling quantities by referencing earthwork calculation methods.

[0067] In steps S1 and S2, given the high accuracy requirements of road surface calculations, the conventional method of representing old road surfaces using traditional topographic maps was avoided. This improved the accuracy of the old road surface and made the digital results more consistent with reality, fundamentally enhancing calculation accuracy. In step S3, a self-developed data conversion tool was used to import the horizontal, vertical, and cross-sectional data from traditional designs into C3D, laying the foundation for subsequent utilization of its powerful computing capabilities and avoiding the loss of design data during the conversion process. In steps S4 and S5, for the first time, the adaptation and selection of highway reconstruction and expansion design schemes and road sections were carried out. A mathematical model was established, allowing the types of components required for the project to be predicted before quantity calculation, thus guiding component editing. Furthermore, in S6, not only was road segment division based on the mathematical model of scheme selection implemented, but road segments were also associated with the appropriate schemes. In S7, a milling surface model for calculation was innovatively created, thereby realizing the calculation of milling quantities based on the milled curved surface and the old road surface curved surface, solving the problem of the difficulty in calculating milling quantities. Finally, in S8, based on the aforementioned multi-layer three-dimensional model, cross-sectional sampling with flexible spacing and quantity calculation were performed, and the calculation of volume and area could be completed automatically in batches.

[0068] Current techniques for calculating the widening of road surfaces during reconstruction and expansion are relatively outdated. In contrast, this invention offers significant advantages. This method fully utilizes valuable original road surface data obtained through advanced data acquisition methods such as airborne laser scanning or high-precision topographic maps (oblique photography). Furthermore, by employing parametric and digital methods, a multi-layered three-dimensional model is established using surface models of various locations. This method enables the rapid and flexible extraction of quantities for different locations, greatly improving the digitalization and automation of quantity calculation methods. It elevates calculation efficiency and accuracy to a level that can effectively guide construction. Moreover, through secondary software development, a set of tools or software for calculating the widening of road surfaces during reconstruction and expansion can be quickly developed, laying a solid foundation for further applications such as dynamic design of road reconstruction and expansion and recycling of asphalt waste, thus promoting technological progress in the industry.

[0069] Compared with existing technologies, the present invention has the following beneficial effects: Addressing the characteristics of numerous design schemes, influencing factors, and flexible selection required for road widening in highway reconstruction and expansion, the present invention constructs a "mathematical model for scheme selection" and utilizes AutoCAD Civil 3D to build a multi-layered three-dimensional model. This innovatively solves the problems of high complexity in matching and selecting road widening schemes with road sections, poor accuracy in calculating engineering quantities, and difficulty in calculating milling quantities. It enables automatic statistical calculation of the engineering quantities for road widening schemes in highway reconstruction and expansion, effectively meeting the calculation needs for the engineering quantities of road surface reconstruction and expansion projects. Attached Figure Description

[0070] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0071] Figure 1 The flowchart of the automatic quantity calculation method for road surface width expansion based on multi-layer three-dimensional model provided by the present invention is shown. Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0073] An automatic quantity calculation method for pavement width expansion in highway reconstruction and widening based on multi-layer 3D models, such as... Figure 1 As shown, it includes the following steps:

[0074] S1. Extract the control point data of the old road surface based on the project topographic map or 3D laser scanning data;

[0075] S2. Import the control point data of the old road surface into AutoCAD Civil 3D, construct the surface, and obtain the surface model of the old road surface.

[0076] S3. Convert the road reconstruction and expansion design data of "JSL-Route Expert System", extract the design data of road plan, longitudinal profile and cross slope, and construct road objects supported by AutoCAD Civil 3D;

[0077] S4. To address the problem of selecting a road surface widening scheme for highway reconstruction and expansion, a "mathematical model for scheme selection" is constructed.

[0078] S5. Using the "scheme selection mathematical model" for road widening, compile parametric components in the component editor (SubassemblyComposer);

[0079] S6. Calculate the specific data of each parameter in the "scheme selection mathematical model", including horizontal widening data, longitudinal overlay data and cross slope adjustment data, and divide the road surface reconstruction and expansion calculation sections.

[0080] S7. Select the appropriate assembly for each section of the road surface to be reconstructed and expanded, and create a multi-layer 3D model.

[0081] S8. Automatically extract the area and volume data of each part of the multi-layer 3D model through sampling lines and material list, and obtain the engineering quantity.

[0082] In step S1, the accuracy of the topographic map is generally higher than 1:2000. The control point data of the old road surface comes from the elevation points or contour lines that are accurately measured within the old road area. The three-dimensional laser scanning data is generally point cloud data collected by airborne radar. The point cloud data within the old road surface area is extracted from it as the control points of the old road surface. The control point data of the old road surface is finally stored in the form of point coordinates (x,y,z).

[0083] In step S2, the specific method is as follows:

[0084] (1) Create a new surface in AutoCAD Civil 3D and define its name;

[0085] (2) Open the surface definition, add the control point data of the old road surface, construct the surface, and obtain the surface model of the old road surface.

[0086] In step S3, the "JSL-Route Expert System" can obtain the plan, longitudinal profile and cross slope design data of the new road, and the plan and longitudinal profile fitting data of the old road. The road object supported by AutoCAD Civil 3D is constructed through data conversion.

[0087] In step S4, to address the issue of numerous and complex controllable factors in highway reconstruction and widening schemes, a "mathematical model for scheme selection" is established based on the influencing factors, as shown in formula (1):

[0088] FA = {PM, ZM, HP} Formula (1)

[0089] In the formula, FA represents the road widening design scheme for road reconstruction and expansion; PM represents the horizontal widening scheme; ZM represents the longitudinal overlay scheme; and HP represents the cross slope adjustment scheme, as detailed below:

[0090] (1) Parameters of planar splicing scheme

[0091] It includes three parameters, as shown in formula (2), namely A1 double-sided splicing width, A2 splicing width transition, and A3 single-sided splicing width;

[0092]

[0093] In the formula: Δs is the horizontal distance between the new and old roads; i and j are the threshold values ​​for determining double-sided and single-sided widening, respectively.

[0094] The width transition can be further subdivided into various planar width transition cases based on the Δs value, as shown in formula (3).

[0095]

[0096] In the formula: a is the selection parameter for the splicing transition scheme, m is the splicing judgment limit value within the transition section, and the meanings of the other parameters are the same as above.

[0097] (2) Parameters of the longitudinal overlay scheme

[0098] It includes two parameters, as shown in formula (4), namely, B1 longitudinal elevation and B2 longitudinal excavation;

[0099]

[0100] In the formula: Δh is the elevation difference between the new and old roads. Based on the value of Δh, various schemes can be further subdivided, such as formula (5) and formula (6).

[0101]

[0102]

[0103] In the formula: b is the selection parameter for longitudinal elevation and longitudinal excavation schemes, k and j are the judgment boundary values ​​for longitudinal paving subdivision schemes, and the meanings of the other parameters are the same as above.

[0104] (3) Cross slope adjustment scheme parameters

[0105] It includes two parameters, as shown in formula (7), namely C1 cross slope reverse adjustment and C2 cross slope same direction adjustment;

[0106]

[0107] In the formula, Δh1 and Δh2 are the elevation differences between the new and old roads at the near and far ends of the old road centerline, respectively.

[0108] The aforementioned "mathematical model for scheme selection" specifies parameters affecting scheme selection from different dimensions. By combining multiple parameters, corresponding design schemes for widening and reconstructing road surfaces can be obtained. For example: FA1={PM(A1),ZM[B1(b 11 )],HP(C1)} represents the adaptation scheme for road sections with double-sided widening, longitudinal elevation value in the range of [0,k1], and reverse cross slope adjustment.

[0109] In step S5, considering the spatial relationship between the new and old roads in the project, and based on the "mathematical model for scheme selection" described in step S4, the types of components that need to be written are determined. Parametric components are then created using the Subassembly Composer, including a planar width adjustment (PM) component, a longitudinal overlay (ZM) component, a cross slope adjustment (HP) component, and a pavement widening design scheme component (FA). The basic approach to component creation is as follows:

[0110] (1) Set the "target parameters" for the old road surface, the width extension line and the splicing joint position to determine the positional relationship between the reconstructed and expanded road surface and the old road, the width extension boundary and the calculation boundary for the new construction and overlay of the reconstructed and expanded road surface;

[0111] (2) Based on the positional relationship of each structural layer in the road widening design scheme, use points, lines and surfaces to describe each structural part, set its logical relationship with the "target parameters", and set the input and output parameters of the component;

[0112] (3) Add structural layer "code" to each structural layer; add line "code" to the milling interface.

[0113] In step S6, the components compiled in step S5 are imported into AutoCAD Civil 3D to create an assembly. The specific segment data for each parameter in the "Scheme Selection Mathematical Model" are calculated, and the pavement quantity calculation segments for the reconstruction and expansion are further divided. The specific method is as follows:

[0114] (1) Open the "Tool Palette" in AutoCAD Civil 3D, define the name, and then import the pre-compiled part;

[0115] (2) In “Create Design”, “Create Assembly”, define a name, draw markers in the drawing area, and select the parts to complete the assembly creation;

[0116] (3) Using the plane width (PM) discrimination component, the coordinates of the center lines of the new and old roads at the same cross section are obtained at a certain sampling interval to calculate Δs, and the starting and ending station numbers of the plane width division interval are obtained;

[0117] (4) Using the longitudinal overlay (ZM) discrimination component, at a certain sampling interval, obtain the elevation values ​​of the new and old road longitudinal control points at the same cross section to calculate Δh, and obtain the starting and ending station numbers of the longitudinal overlay section;

[0118] (5) Using the cross slope adjustment (HP) discrimination component, at a certain sampling interval, take the near and far elevation values ​​and horizontal distances of the old road centerline at the same cross section of the old road, calculate the cross slope of the old road surface and Δh1, Δh2, and obtain the starting and ending station numbers of the cross slope adjustment interval;

[0119] (6) Divide the entire design line into sections based on the horizontal width, longitudinal paving, and cross slope adjustment sections.

[0120] In step S7, based on the segmentation data of the entire line obtained in step S6, the corresponding assemblies are selected to create a multi-layer 3D model. The specific method is as follows:

[0121] (1) In AutoCAD Civil 3D, “Create Road” and select the horizontal alignment and longitudinal profile of the new road;

[0122] (2) Select road characteristics, set road parameters, add "regions" to the road according to the segment data divided in step S6, set the start and end station numbers, and select the corresponding assembly;

[0123] (3) Set the "target" and "step size" for each area to generate the structural layer model of the road surface to be reconstructed and expanded;

[0124] (4) Select “Road Properties”, then select “Surface” and “Create Road Surface” in sequence. Set the “Connection” data type and specify the code as the line “code” of the milling interface. Create the surface to obtain the milling surface model of the road widening scheme for the reconstruction and expansion.

[0125] In step S8, sampling lines are used to collect multi-layer three-dimensional model data of the road widening and reconstruction scheme, and the material is set to automatically extract the engineering quantity data of each layer. The specific method is as follows:

[0126] (1) Set up sampling lines in AutoCAD Civil 3D, and set the new road plane line position and define the sampling line name in sequence;

[0127] (2) Set the sampling data source to a multi-layer three-dimensional model, including the old road surface model, the milled surface model, and the structural layer model of the reconstructed and expanded road surface;

[0128] (3) Set the sampling line grouping sampling width and sampling rules to obtain multiple sampling lines within a certain range;

[0129] (4) Set the sampling line grouping properties and set the "Material List";

[0130] (5) Select "Import another rule", then select "Edit current rule" or "New", and set the corresponding material list for "New pavement", "Overlay pavement" and "Milled pavement" respectively;

[0131] (6) In the "New Road Surface" and "Addition Road Surface" lists, add "New Material", set the earthwork type to "Structure", and add the structural layers of each part of the reconstructed and expanded road surface one by one;

[0132] (7) In the "Milled Road Surface" list, add a new material, set the earthwork type to "Excavation", add a "sub-standard", add the old road surface model inside and set it to "below", add the milled surface model and set it to "above";

[0133] (8) Select the “Analysis” panel, select “Volume Report”, and set the new road alignment, sampling line grouping, and material list in sequence. When the output is “New Road Surface” or “Overlay Road Surface” and the material is of the “Structure” type, select the “SelectMaterial.xsl” style sheet (Select Material.xsl); when the output is “Milled Road Surface” and the material is of the “Earthwork” type, select the “earthwork.xsl” style sheet (Earthwork Engineering.xsl) to automatically complete the quantity statistics calculation.

[0134] It should be understood that the above description of the preferred embodiments is quite detailed, but it should not be considered as a limitation on the scope of protection of this invention. Those skilled in the art, under the guidance of this invention, can make substitutions or modifications without departing from the scope of protection of the claims of this invention, and all such substitutions or modifications fall within the scope of protection of this invention. The scope of protection of this invention should be determined by the appended claims.

Claims

1. A highway reconstruction pavement widening automatic calculation method based on a multi-layer three-dimensional model, characterized in that, The method comprises the following steps: S1, extracting old road pavement control point data according to project topographic map or three-dimensional laser scanning data; S2, importing the old road pavement control point data into AutoCAD Civil 3D, constructing a curved surface, and obtaining an old road pavement surface model; S3, converting the design data of the JSL-route expert system for the reconstruction and expansion road, extracting the design data of the road plane, longitudinal section and cross slope, and constructing the road object supported by AutoCAD Civil 3D; S4, constructing a scheme selection mathematical model for the pavement widening scheme selection problem of the highway reconstruction and expansion road; S5, using the pavement widening scheme selection mathematical model to compile a parameterized component in the component editor; S6, calculating the specific data of each parameter of the scheme selection mathematical model, including the plane widening data, longitudinal surface paving data and cross slope adjustment data, and dividing the reconstruction and expansion road calculation section; S7, selecting a corresponding assembly for each reconstruction and expansion road calculation section, and creating a multi-layer three-dimensional model; S8, automatically extracting the area and volume data of each part of the multi-layer three-dimensional model through a sampling line and a material list, and statistically obtaining the engineering quantity; In step S8, the multi-layer three-dimensional model data constructed by the reconstruction and expansion road widening scheme is collected by using the sampling line, and the material is automatically extracted to obtain the engineering quantity data of each layer. The specific method is as follows: (1) setting the sampling line in AutoCAD Civil 3D, and setting the new road plane line position and defining the sampling line name in turn; (2) setting the sampling data source as the multi-layer three-dimensional model, including the old road pavement surface model, the milling surface model and the reconstruction and expansion road structure layer model; (3) setting the sampling line grouping sampling width and sampling rule to obtain a plurality of sampling lines within a certain range; (4) setting the sampling line grouping characteristics and setting the material list; (5) selecting to import another rule, selecting to edit the current rule or to newly build, and setting the corresponding material list for the newly built road, the paved road and the milled road respectively; (6) adding a new material in the newly built road and the paved road list, setting the earthwork type as structure, and adding the structure layers of each part of the reconstruction and expansion road one by one; (7) adding a new material in the milled road list, setting the earthwork type as excavation, adding a sub-standard, adding the old road pavement surface model inward and setting it as the lower part, and adding the milling surface model and setting it as the upper part; (8) selecting the analysis panel, selecting the volume report, setting the new road plane line position, the sampling line grouping and the material list in turn, selecting the Select Material.xsl stylesheet when the newly built road or the paved road is output and the material is of the structure type, and selecting the earthwork.xsl stylesheet when the milled road is output and the material is of the earthwork type, to automatically complete the quantity statistical calculation.

2. The highway reconstruction pavement widening automatic calculation method based on a multi-layer three-dimensional model according to claim 1, characterized in that, In step S1, the topographic map has a precision higher than 1:2000, and the old road pavement control point data is derived from the accurately measured elevation points or contour lines within the old road range; the three-dimensional laser scanning data is the point cloud data collected by the airborne radar, from which the point cloud data within the old road pavement range is extracted as the old road pavement control point; and the old road pavement control point data is stored in the form of point coordinates (x, y, z).

3. The highway reconstruction pavement widening automatic calculation method based on a multi-layer three-dimensional model according to claim 1, characterized in that, In step S2, the specific method is as follows: (1) New surface is created in AutoCAD Civil 3D, and the name is defined; (2) The surface definition is opened, the old road pavement control point data is added, the surface is constructed, and the old road pavement surface model is obtained.

4. The highway reconstruction pavement widening automatic calculation method based on a multi-layer three-dimensional model according to claim 1, characterized in that, In step S3, the plane, longitudinal section and transverse slope design data of the new road and the plane, longitudinal section fitting data of the old road are obtained in the JSL-route expert system, and the road object supported by AutoCAD Civil 3D is constructed through data conversion.

5. The highway reconstruction pavement widening automatic calculation method based on a multi-layer three-dimensional model according to claim 1, characterized in that, In step S4, a scheme selection mathematical model is established according to the scheme influencing factors, such as formula (1): Formula (1); In the formula: FA is the design scheme of pavement widening of the reconstruction and expansion road; PM is the plane widening scheme; ZM is the longitudinal surface paving scheme; HP is the transverse slope adjustment scheme, which is specifically as follows: (1) Plane widening scheme parameters The three parameters include, as in equation (2), respectively Double-sided width splicing, Width splicing transition, Single-sided width splicing; Formula (2); In the formula: is the new and old road plane distance; respectively, the bilateral and unilateral splicing width determination limit value; The transition according to the width combination The value is further subdivided into a variety of flat width combination, such as formula (3); Formula (3); In the formula: a is the scheme selection parameter of the widening transition, and m is the transition segment within the widening determination limit value; (2) Longitudinal surface paving scheme parameters Two parameters are included, as in equation (4), respectively Longitudinal face lifting, Longitudinal face digging; Equation (4); In the formula: is the difference between the new and old road elevations; According to The values are further subdivided into various schemes, such as equation (5), equation (6), Formula (5); Equation (6); wherein: b is a profile lifting and profile cutting selection parameter, is a profile adding sub-scheme determination limit value; (3) Transverse slope adjustment scheme parameters Two parameters are included, as in equation (7), respectively Transverse slope reverse adjustment, Transverse slope same direction adjustment; Equation (7); In the formula: , are the elevation differences of the new and old roads near and far from the center line of the old road, respectively. The above scheme selection mathematical model specifies the parameters affecting the scheme selection from different dimensions, and the corresponding design scheme of pavement widening of the reconstruction and expansion road is obtained through multi-parameter combination.

6. The highway reconstruction pavement widening automatic calculation method based on a multi-layer three-dimensional model according to claim 1, characterized in that, In step S5, combined with the spatial position relationship characteristics between the new and old roads of the project, the component type to be programmed is determined according to the scheme selection mathematical model of step S4, and the parametric component is programmed by using the component editor, including the plane widening judgment component, the longitudinal surface paving judgment component, the transverse slope adjustment judgment component and the design scheme component of the pavement widening of the reconstruction and expansion road. The component programming method is as follows: (1) The old road surface, the widening boundary line and the joint position target parameters are set, which are used to judge the position relationship between the reconstruction and expansion road and the old road, the widening boundary and the calculation limit line of the newly built and paved reconstruction and expansion road; (2) According to the position relationship of each structural layer in the design scheme of pavement widening of the reconstruction and expansion road, each structural part is described by using points, lines and surfaces, and the logical relationship between them and the target parameters is set, and the input and output parameters of the component are set; (3) The structural layer code is added to each structural layer, and the line code is added to the milling interface.

7. The highway reconstruction pavement widening automatic calculation method based on a multi-layer three-dimensional model according to claim 1, characterized in that, In step S6, the components programmed in step S5 are imported into AutoCAD Civil 3D to create an assembly, each parameter specific segment data in the scheme selection mathematical model is calculated, and the calculation segment of the reconstruction and expansion road is further divided. The specific method is as follows: (1) The programmed component is imported into AutoCAD Civil 3D after the tool option board is opened and the name is defined; (2) The assembly is created in the design, the name is defined, the mark points are drawn in the drawing area, and the component is selected to complete the assembly creation; (3) using the plane splicing width discrimination component, according to certain sampling interval, respectively obtaining the coordinate points of the new and old road center lines at the same section to calculate the start and end point stake numbers of the plane splicing width division interval; (4) Using the longitudinal profile overlay discrimination component, the elevation values of the new and old road longitudinal profile control points at the same section are obtained at a certain sampling interval to calculate the start and end point stake numbers of the longitudinal profile overlay section . (5) using the cross slope adjustment discrimination component, taking the old road center line near end and far end elevation value and horizontal distance at the same section of the old road according to certain sampling interval, calculating the old road pavement cross slope and , , obtaining the start and end point stake number of the cross slope adjustment interval; (6) According to the plane widening, longitudinal surface paving and transverse slope adjustment segment, the whole line is segmented.

8. The highway reconstruction pavement widening automatic calculation method based on a multi-layer three-dimensional model according to claim 1, characterized in that, In step S7, according to the segmented data of the whole line in step S6, the corresponding assembly is selected, and a multi-layer three-dimensional model is created. The specific method is as follows: (1) The road is created in AutoCAD Civil 3D, and the plane line position and the longitudinal section of the new road are selected; (2) The road characteristics are selected, the road parameters are set, the region is added to the road according to the segmented data of step S6, and the start and end stake numbers are set, and the corresponding assembly is selected; (3) Set the target and step of each area, and generate the model of each structure layer of the pavement of reconstruction and extension; (4) Select the road characteristics, select the curved surface, create the road curved surface, set the connection data type, specify the code as the line code of the milling interface, create the curved surface, and obtain the milling surface model of the pavement widening scheme of reconstruction and extension.

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