CN115422644A - Roadbed section rapid construction method based on network map service - Google Patents
Roadbed section rapid construction method based on network map service Download PDFInfo
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Abstract
The invention relates to roadbed section design, in particular to a roadbed section rapid construction method based on network map service, which comprises the following steps: carrying digital elevation model network map service and line network map service on a GIS platform; selecting position points needing to construct a roadbed section within the roadbed work point range; calculating the closest point on the route to the selected position point; calculating mileage information and line elevation of the closest point; obtaining a straight line segment with the total length of 200m, and extending the straight line segment by 100m towards the left side and the right side of the route respectively by taking the closest point as a midpoint; acquiring the terrain elevation information along the straight line segment and acquiring a terrain section line; inputting design parameters and automatically calculating the roadbed outline from the nearest point to a terrain profile line according to a roadbed section basic rule; calculating the difference value between the line elevation of the closest point and the ground elevation to obtain the filling and digging height; and (5) integrating the information to draw a roadbed section schematic diagram. The invention greatly improves the design efficiency of the simple roadbed cross section during early stage route selection.
Description
Technical Field
The invention relates to the field of roadbed section design, in particular to a roadbed section rapid construction method based on a network map service, electronic equipment and a readable storage medium.
Background
Most of the existing roadbed designs are developed based on cross section design, and the essence of the roadbed engineering design is the cross section design no matter the traditional two-dimensional design or the BIM design for developing fire and heat nowadays. Around the cross section design standard, components, assembly modes, threshold parameters and the like of roadbed engineering, through exploration and practice of numerous projects at home and abroad, a plurality of complete and feasible design schemes aiming at various roadbed engineering are groped and summarized, and through precipitation for years in various domestic reconnaissance schools and construction units, various design schemes are summarized and compiled into various design software such as AutoCAD, revit and the like through means such as secondary development and the like.
The designer carries out roadbed design work, generally, the required section is submitted to upstream professional actual measurement firstly, a result is waited to be returned, and then the assembling parts, the assembling mode and the assembling position are manually selected according to section information and line position information, so that one-time roadbed section design is completed. The above-mentioned operation flow is complicated, and the step of forming the road bed section is various, and it is longer to spend time, is difficult to accomplish the route selection in earlier stage, when comparing the selection scheme to many circuits, can cause the work of design of huge road bed section. The present invention improves upon the above-mentioned deficiencies.
Disclosure of Invention
In order to overcome the defects of the background art, the invention provides a roadbed section rapid construction method based on a network map service, an electronic device and a readable storage medium, so that the professional threshold of roadbed section design is reduced, the design flow of the roadbed section is simplified, and the design efficiency is greatly improved.
The invention provides a method for quickly constructing a roadbed section based on a network map service, which comprises the following steps:
s1, carrying digital elevation model network map service and line network map service on a GIS platform, wherein the line network map service comprises line position information, hectometer marks and kilometer marks;
s2, determining a route on a GIS platform according to line position information of the line network map service, and selecting a position point needing to construct a roadbed section within a roadbed work point range determined according to the route;
s3, calculating a point which is closest to the position point selected in the step S2 on the route, namely a closest point;
s4, calculating mileage information and line elevation of the closest point;
s5, connecting the position point selected in the step S2 with the nearest point obtained in the step S3 to form a first line segment, projecting the first line segment onto a horizontal plane passing through the nearest point to form a second line segment, and extending the second line segment towards two sides to form straight line segments, so that the straight line segments are extended by 100m towards the left side and the right side of the route by taking the nearest point as a middle point, and then obtaining straight line segments with the total length of 200 m;
s6, acquiring terrain elevation information along the straight line segment obtained in the step S5 in the digital elevation model network map service to obtain a terrain section line;
and S7, inputting design parameters and automatically calculating the roadbed contour from the closest point to a terrain profile according to a roadbed section basic rule. If the calculation is successful, executing the step S8, if the calculation is unsuccessful, reselecting the position points and the design parameters of the roadbed section to be constructed, and repeating the steps S2-S7;
s8, calculating the difference value between the line elevation of the closest point and the ground elevation, namely the filling and digging height;
and S9, integrating the mileage information and the line elevation information obtained in the step S4, the terrain section line information obtained in the step S6, the roadbed contour information obtained in the step S7 and the filling and excavating height information obtained in the step S8, and drawing a roadbed section schematic diagram.
Preferably, in step S1, the digital elevation model network map service is manufactured as a digital elevation model after collecting or acquiring topographic information by a measurement professional, and is released as a network map service, and the line location information, hectometer and kilometer post in the line network map service are provided by a line professional, and are released as a network map service.
Preferably, in step S3, the position point selected in step S2 is taken as a center of sphere, and the radius of the sphere is continuously enlarged until the sphere is tangent to the route, and the obtained tangent point is the closest point.
Preferably, in step S4, two kilometers posts and two hectometer posts closest to the closest point on the route are searched in the route network map service, the mileage information of the closest point is calculated according to the kilometer posts and the hectometer posts, and the elevation information of the closest point on the line position is directly read from the route elevation of the closest point.
Preferably, the step S6 specifically includes: and defining a surface which passes through the straight line section and is vertical to the horizontal plane as a vertical plane, defining a section of terrain contour line by the 200m straight line section, projecting the section of terrain contour line onto the horizontal plane to form the 200m straight line section, and acquiring elevation information along the section of terrain contour line in the digital elevation model network map service to obtain a terrain section line.
Preferably, in the digital elevation model network map service, obtaining elevation information along the section of the terrain contour line to obtain a terrain profile line specifically includes:
s21, setting a point element at equal intervals along the straight line segment, wherein each point element corresponds to a topographic point on the topographic contour line, and recording the distance from each point element to the leftmost end of the straight line segment;
s22, acquiring elevation information of topographical points corresponding to all set point elements in the digital elevation model network map service;
and S23, determining a plurality of discrete points by taking the distance from the point element to the leftmost end of the straight line section as an abscissa and taking the elevation information of the topographic point corresponding to the point element as an ordinate, and sequentially arranging the discrete points according to the size of the abscissa, and connecting the discrete points to obtain the topographic cross-sectional line.
Preferably, in step S7, the preset design parameters include roadbed width, side ditch size, retaining height, embankment slope rate, embankment slope height, cutting slope rate, cutting slope height and slope platform width, the roadbed profile automatically calculated according to roadbed section foundation rules from the closest point to the terrain section line specifically includes:
s31, according to the width of the roadbed, extending from the closest point to the left side and the right side to obtain the positions of left and right side road shoulders;
s32, judging the relation between the shoulder and the terrain profile line so as to determine whether the side is a embankment side slope or a cutting side slope, if so, executing steps S33-S34, and if so, executing steps S35-S36;
s33, if the embankment side slope is the embankment side slope, the embankment side slope is gradually released according to the preset embankment side slope rate, the embankment side slope height and the side slope platform width, and when the bottom standard height of the embankment is lower than the terrain section line, the releasing of the embankment side slope is stopped;
s34, solving an intersection point of the embankment side slope contour line and the terrain section line, and cutting to remove the part of the embankment side slope contour line below the terrain section line;
s35, if the cutting slope is the cutting slope, drawing a part of contour lines according to the size of the side ditches and the height of the supporting stops, grading the slope according to the slope rate of the cutting slope, the height of the cutting slope and the width of a slope platform, and stopping slope grading when the height of the top of the cutting is higher than the terrain profile line;
s36, solving an intersection point of the cutting slope contour line and the terrain profile line, and cutting to remove the part of the cutting slope contour line above the terrain profile line;
and S37, integrating the roadbed contour obtained in the step S31 and the roadbed contour outside the road shoulder obtained in the steps S32-S36, and splicing to obtain a complete roadbed contour.
Preferably, after step S9, the method further comprises: and drawing a three-dimensional roadbed contour line with a geographical coordinate by using the roadbed contour information obtained in the step S7 so as to enable the three-dimensional roadbed contour line to be intersected with a route in the line network map service.
The invention also provides an electronic device, which comprises a processor and a memory, wherein the memory is stored with a computer program, and when the computer program is executed by the processor, the method for quickly constructing the roadbed section based on the network map service is realized.
The invention also provides a readable storage medium, wherein a computer program is stored in the readable storage medium, and when the computer program is executed by a processor, the method for quickly constructing the roadbed section based on the network map service is realized.
In conclusion, the beneficial effects of the invention are as follows:
1. the method directly acquires the terrain information and the line position information in the network map service, simplifies the step of submitting the section requirements to upstream specialties and the step of directionally providing the terrain information and the line position information to the upstream specialties, and optimizes the operation flow among the specialties;
2. according to the invention, by means of the built-in roadbed design rule, the design of the roadbed cross section can be automatically completed only by investigating part of fixed parameters input by a designer, so that the professional threshold of the roadbed cross section design is reduced, and the design flow of the roadbed cross section is simplified;
3. according to the method, the operation flows among various professionals are simplified, the design threshold of the cross section of the roadbed is reduced, the design of the cross section of the roadbed which can be completed within hours or even days originally is simplified into the mode that clicking of a mouse and digital input of a keyboard are performed for several times, the drawing can be completed within several minutes, and the design efficiency of the cross section of the simple roadbed is greatly improved.
The invention will be further explained with reference to the drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a construction method of the present invention;
FIG. 2 is a schematic cross-sectional view of a roadbed with embankment side slopes on the outer sides of left and right side road shoulders according to the present invention;
FIG. 3 is a schematic cross-sectional view of a roadbed with cutting slopes on the outer sides of left and right side road shoulders according to the present invention;
the labels in the figure are: 1-nearest point, 2-topographic cross section line, 3-road shoulder, 4-embankment side slope and 5-cutting side slope.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 3 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention.
According to the invention, secondary development is carried out in a GIS platform, so that the method for quickly constructing the roadbed cross section based on the network map service is realized, and the one-key type simple roadbed cross section is quickly constructed. In particular embodiments, GIS platforms suitable for use with the present invention include, but are not limited to: arcGIS, cesium, skyline. ArcGIS is preferred in this embodiment.
As shown in fig. 1 to fig. 3, a method for quickly constructing a roadbed section based on a network map service disclosed in this embodiment includes:
s1, carrying digital elevation model network map service and line network map service on a GIS platform, wherein the line network map service comprises line position information, hectometer marks and kilometer marks;
the step is used for preparing the digital elevation model network map service and the line network map service, and is convenient for subsequent steps.
S2, determining a route on a GIS platform according to line position information of the line network map service, and selecting a position point needing to construct a roadbed section within a roadbed work point range determined according to the route;
specifically, the step is that a survey designer directly selects the position of the roadbed cross section to be constructed by using a mouse near a route according to the roadbed work point range and the comprehensive interpretation of the roadbed work point range on the terrain, geology, mineral products, hydrology, ground disasters and other data.
S3, calculating a point which is closest to the position point selected in the step S2 on the route, namely a closest point 1;
this step is used to determine the closest point on the route to the selected location point and serves as the basis for subsequent renderings.
S4, calculating mileage information and line elevation of the closest point 1;
this step is used to determine the relative position of the closest point 1 on the entire route and to obtain the line elevation of the closest point 1.
S5, connecting the position point selected in the step S2 with the closest point 1 obtained in the step S3 to form a first line segment, projecting the first line segment onto a horizontal plane passing through the closest point 1 to form a second line segment, and extending the second line segment towards two sides to form a straight line segment, so that the straight line segment takes the closest point 1 as a middle point and extends towards the left side and the right side of the route by 100m respectively to obtain a straight line segment with the total length of 200 m;
in the step, geodetic coordinates rather than geographical coordinates are used for calculation when the two points are connected to form the first line segment, the second line segment is formed by projection, and the line segment is extended, the obtained straight line segment is ensured to be a straight line in the engineering sense by using the geodetic coordinates, and if the geographical coordinates are used for calculation, the obtained straight line is actually a curve in the engineering sense due to projection change. Because the closest point 1 obtained in the step S3 is the closest point 1 from the position point selected in the step S2 to the route, it can be ensured that the first line segment formed by the connection line of the closest point 1 and the selected position point is perpendicular to the line position (i.e. the local route where the closest point 1 is located), and the second line segment is also perpendicular to the line position, and the closest point 1 is taken as the starting point, and the left side and the right side extend by 100m respectively, so that the data volume can be ensured to be sufficient in the subsequent calculation, and a calculation error that the boundary of the subgrade contour bottom exceeds the terrain profile 2 can be prevented, specifically, the data volume is insufficient when the extending distance is insufficient, and the boundary of the subgrade contour can not intersect with the terrain profile 2, i.e. exceeds the terrain profile 2, and further the calculation error can be caused.
S6, acquiring terrain elevation information along the straight line segment obtained in the step S5 in the digital elevation model network map service to obtain a terrain section line 2;
and S7, inputting design parameters and automatically calculating the roadbed contour from the closest point 1 to the terrain profile line 2 according to a roadbed profile basic rule. If the calculation is successful, executing the step S8, if the calculation is unsuccessful, reselecting the position points and the design parameters of the roadbed section to be constructed, and repeating the steps S2-S7;
the step is used for calculating the roadbed contour from the closest point 1 to the terrain profile line 2, if the calculation is successful in specific implementation, the step S8 is executed, if the calculation is unsuccessful, an error reason is prompted, a survey designer is guided to reselect the position and the design parameters, and the steps S2-S7 are repeated, wherein the error reason is prompted to be an optimal implementation mode, the survey designer can be guided to make adjustment conveniently by prompting the error reason, and the roadbed contour can be calculated successfully. The reasons for the unsuccessful calculation errors are mainly: 1. the terrain is steep, so that the roadbed slope can not intersect with the ground all the time; 2. the filling and digging height is over-limit, so that the roadbed slope does not meet the engineering requirements. According to the error reasons of the prompts, the survey designer can quickly and correspondingly make adjustments.
S8, calculating the difference value between the line elevation of the closest point 1 and the ground elevation, namely the filling and digging height;
the step is used for calculating the filling and excavating height by taking the closest point 1 as a reference, when the roadbed profile is successfully calculated and a result is obtained, the filling and excavating height needs to be calculated, and the information is an indispensable important component in the roadbed section schematic diagram and needs to be marked in the roadbed section schematic diagram.
And S9, integrating the mileage information and the line elevation information obtained in the step S4, the topographic section line 2 information obtained in the step S6, the roadbed outline information obtained in the step S7 and the filling height information obtained in the step S8, and drawing a roadbed section schematic diagram.
In this step, the mileage information, the elevation information, the terrain profile 2, the roadbed profile, the filling height and the like obtained in steps S4, S6, S7 and S8 need to be converted into two-dimensional plane relative coordinates with the closest point 1 as a starting point, and the roadbed cross-section schematic diagram is obtained by drawing with canvas according to the relative coordinates.
Therefore, the method obtains the topographic section information and the line position information of the selected position point by utilizing the GIS platform and the network map service, can quickly construct the roadbed cross section according to certain design parameters and rules, saves the data mutual extraction process with the upstream major and the manual roadbed component selection and assembly process, greatly improves the design efficiency of the simple roadbed cross section during the early line selection, and can better meet the actual requirements.
As a preferred technical solution, in step S1, the digital elevation model network map service is manufactured into a digital elevation model after collecting or acquiring topographic information by a measurement professional, and is released as a network map service, and line position information, hectometer and kilometer post in the line network map service are provided by a line professional, and are released as a network map service. In the step, the digital elevation model network map service is a network map service which is acquired or actually measured by a measurement professional and is issued to an ArcGIS server after being preprocessed, the service mode is ImageServer, and the service data format is LERC; the line network map service is line position information and mileage information which are drawn by line speciality, and the line position information and the mileage information are issued to the ArcGIS server after being preprocessed, and the service mode is FeatureServer.
As a preferable technical solution, in step S3, the position point selected in step S2 is taken as a sphere center, and the sphere radius is continuously enlarged until the sphere is tangent to the route, and the obtained tangent point is the closest point 1. In this embodiment, the step is implemented by calling an ArcGIS platform encapsulation tool, specifically calling a nearestCoordinate method under geometriengine tools, and the basic principle is that a selected position point is taken as a sphere center, the sphere radius is continuously enlarged until a sphere is tangent to a line position, and an obtained tangent point is the obtained closest point 1.
As a preferable technical solution, in step S4, two kilometers posts and two hectometers that are closest to the closest point 1 on the route are searched in the route network map service, and the mileage information of the closest point 1 is calculated according to the kilometers posts and the hectometers, and the elevation information of the closest point 1 on the line position is directly read by the route elevation of the closest point 1. In this embodiment, the queryffeaturs method in the ArcGIS platform encapsulation tool is used in this step, the result is obtained by two times of query, first, 100m is used as the radius, the nearest two hectometer marks are obtained by search, then, 1km is used as the radius, the nearest two kilometer marks are obtained by search, the hectometer marks and the kilometer marks which are obtained by search are taken and added, the kilometer marks with smaller values are used as the mileage base number, and then, the distance proportion from the nearest point 1 to the two hectometer marks is combined, so that accurate mileage information can be calculated; in the digital elevation model network map service, the elevation information of the nearest point 1 on the line position obtained in the step S3, that is, the line elevation of the nearest point 1, can be directly read.
As a preferred technical solution, the step S6 specifically includes: and defining a plane which passes through the straight line section and is vertical to the horizontal plane as a vertical plane, defining a terrain contour line as an intersecting line of the ground surface and the vertical plane, defining a terrain contour line through the 200m straight line section, projecting the terrain contour line onto the horizontal plane to form the 200m straight line section, and acquiring elevation information along the terrain contour line in the digital elevation model network map service to obtain a terrain section line 2. The vertical surface defined in the embodiment can be understood as a sectioning surface for sectioning a roadbed section, an intersection line of the vertical surface and the ground surface is a terrain profile line, and drawing the terrain profile line 2 is actually drawing the terrain profile line.
As a preferred technical solution, in the digital elevation model network map service, obtaining elevation information along the section of the terrain contour line to obtain a terrain profile line 2 specifically includes:
s21, setting a point element at equal intervals along the straight line segment, wherein each point element corresponds to a topographic point on the topographic contour line, and recording the distance from each point element to the leftmost end of the straight line segment;
in this step, a plurality of point elements are selected at equal intervals along the straight line segment, and the corresponding relationship between the point elements and the topographical points in this embodiment is a projection relationship, that is, the projection points of the topographical points on the topographical contour line on the horizontal plane are the point elements corresponding to the topographical points.
S22, acquiring elevation information of topographical points corresponding to all set point elements in the digital elevation model network map service;
in this step, each set point element corresponds to a topographical point, and the elevation information of these topographical points can be acquired through the digital elevation model network map service.
And S23, determining a plurality of discrete points by taking the distance from the point element to the leftmost end of the straight line section as an abscissa and taking the elevation information of the topographic point corresponding to the point element as an ordinate, and sequentially arranging the discrete points according to the size of the abscissa, and connecting the discrete points to obtain the topographic cross-sectional line 2.
According to the step, discrete points are determined by establishing an abscissa and an ordinate, then a plurality of discrete points are connected to form a line to form the terrain profile line 2, the essence is that the terrain profile line is fitted through the discrete points, the more the number of point elements selected at equal intervals along the straight line section is, the closer the fitted and drawn terrain profile line 2 is to the real terrain profile line, namely, the closer the actual working condition is, and therefore, the method can be used for conveniently and quickly fitting and drawing the terrain profile line 2 and quickening the drawing of the roadbed section.
As an optimal technical scheme, in step S7, the preset design parameters include roadbed width, side ditch size, retaining height, embankment side slope 4 slope rate, embankment side slope 4 height, cutting side slope 5 slope rate, cutting side slope 5 height and side slope platform width, and the roadbed profile from the closest point 1 to the terrain profile line 2 is automatically calculated according to the roadbed section basic rule and specifically includes:
s31, extending from the closest point 1 to the left and right sides according to the width of the roadbed to obtain the positions of left and right road shoulders 3;
s32, judging the relation between the road shoulder 3 and the terrain profile line 2 to determine whether the side is a embankment side slope 4 or a cutting side slope 5, if the side is the embankment side slope 4, executing steps S33-S34, and if the side is the cutting side slope 5, executing steps S35-S36;
in this step, if the shoulder 3 is higher than the terrain profile line 2, the side is the embankment slope 4 and steps S33-S34 are performed, and if the shoulder 3 is lower than the terrain profile line 2, the side is the cutting slope 5 and steps S35-S36 are performed.
S33, if the embankment side slope 4 is adopted, the embankment is gradually released according to the preset embankment side slope 4 slope rate, the height of the embankment side slope 4 and the width of a side slope platform, and when the height of the bottom of the embankment is lower than the terrain section line 2, the releasing is stopped;
s34, solving an intersection point of the contour line of the embankment side slope 4 and the terrain section line 2, and cutting to remove the part of the contour line of the embankment side slope 4 below the terrain section line 2;
s35, if the cutting slope is a cutting side slope 5, drawing a part of contour lines according to the size of the side ditch and the height of the supporting barrier, grading the slope according to the slope rate of the cutting side slope 5, the height of the cutting side slope 5 and the width of a slope platform, and stopping slope grading when the top index of the cutting is higher than the topographic cross section line 2;
s36, solving an intersection point of the cutting slope 5 contour line and the terrain profile line 2, and cutting to remove the part of the cutting slope 5 contour line above the terrain profile line 2;
and S37, integrating the roadbed contour obtained in the step S31 and the roadbed contour outside the road shoulder 3 obtained in the steps S32-S36, and splicing to obtain a complete roadbed contour.
In this embodiment, the input design parameters are preset parameters, which include, but are not limited to, roadbed width, side ditch size, retaining height, embankment side slope 4 slope rate, embankment side slope 4 height, cutting side slope 5 slope rate, cutting side slope 5 height, side slope platform width, etc., step S31 determines the positions of the left and right side shoulders 3, step S32 is used for judging the relationship between the shoulders 3 and the terrain profile 2, so as to determine whether the side is an embankment side slope 4 or a cutting side slope 5, further different operation steps are performed to draw the roadbed profile of the side, the roadbed profile obtained in step S31 and the roadbed profile outside the shoulders 3 obtained in steps S32-S36 are spliced to obtain a complete roadbed profile, and the roadbed profile from the closest point 1 to the terrain profile 2 is drawn.
As a preferred technical solution, after step S9, the method further includes: and drawing a three-dimensional roadbed contour line with a geographical coordinate by using the roadbed contour information obtained in the step S7 so as to enable the three-dimensional roadbed contour line to be intersected with a route in the line network map service. In this embodiment, a step is added after step S9, and as step S10, the step redraws the three-dimensional roadbed contour line into a map scene according to the real geographic coordinates of the roadbed contour information and a drawing tool in the ArcGIS platform, so that the roadbed contour line directly intersects with the surface line and the line position (i.e., the route) of the terrain end, which can bring intuitive visual perception to the survey designer, and can facilitate the survey designer to improve the design efficiency.
Based on the same inventive concept, the embodiment further discloses an electronic device, which includes a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the method for quickly constructing the roadbed section based on the network map service is implemented.
The processor may be a Central Processing Unit (CPU), controller, microcontroller, microprocessor, or other data Processing chip in some embodiments. The processor is typically used to control the overall operation of the electronic device. In this embodiment, the processor is configured to run a program code stored in the memory or process data, for example, a program code for running a roadbed section rapid construction method based on a network map service.
The memory includes at least one type of readable storage medium including a flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Programmable Read Only Memory (PROM), a magnetic memory, a magnetic disk, an optical disk, etc. In some embodiments, the storage may be an internal storage unit of the electronic device, such as a hard disk or a memory of the electronic device. In other embodiments, the memory may also be an external storage device of the electronic device, such as a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) Card, a flash memory Card (FlashCard), and the like, provided on the electronic device. Of course, the memory may also include both internal and external storage units of the electronic device. In this embodiment, the memory is generally used to store an operating method installed in the electronic device and various types of application software, such as a program code of a roadbed section rapid construction method based on a network map service. In addition, the memory may also be used to temporarily store various types of data that have been output or are to be output.
Based on the same inventive concept, the embodiment further discloses a readable storage medium, wherein a computer program is stored in the readable storage medium, and when the computer program is executed by a processor, the method for quickly constructing the roadbed section based on the network map service is realized.
The application fields of the method, the electronic equipment and the readable storage medium provided by the embodiment of the invention include but are not limited to railway design, and the method, the electronic equipment and the readable storage medium can well meet the actual use requirements and greatly accelerate the design efficiency.
The parts not referred to in the present embodiment are the same as or can be implemented by the prior art, and will not be further described here.
The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto, and any modification applying the inventive concept is intended to be included within the scope of the patent claims.
Claims (10)
1. A roadbed section rapid construction method based on network map service is characterized by comprising the following steps:
s1, carrying digital elevation model network map service and line network map service on a GIS platform, wherein the line network map service comprises line position information, hectometer marks and kilometer marks;
s2, determining a route on a GIS platform according to line position information of the line network map service, and selecting a position point needing to construct a roadbed section within a roadbed work point range determined according to the route;
s3, calculating a point which is closest to the position point selected in the step S2 on the route, namely a closest point;
s4, calculating mileage information and line elevation of the closest point;
s5, connecting the position point selected in the step S2 with the nearest point obtained in the step S3 to form a first line segment, projecting the first line segment onto a horizontal plane passing through the nearest point to form a second line segment, and extending the second line segment towards two sides to form straight line segments, so that the straight line segments are extended by 100m towards the left side and the right side of the route by taking the nearest point as a middle point, and then obtaining straight line segments with the total length of 200 m;
s6, acquiring terrain elevation information along the straight line segment obtained in the step S5 in the digital elevation model network map service to obtain a terrain section line;
and S7, inputting design parameters and automatically calculating the roadbed contour from the closest point to a terrain profile line according to a roadbed section basic rule. If the calculation is successful, executing the step S8, if the calculation is unsuccessful, reselecting the position points and the design parameters of the roadbed section to be constructed, and repeating the steps S2-S7;
s8, calculating the difference value between the line elevation of the closest point and the ground elevation, namely the filling and digging height;
and S9, integrating the mileage information and the line elevation information obtained in the step S4, the terrain section line information obtained in the step S6, the roadbed outline information obtained in the step S7 and the filling and digging height information obtained in the step S8, and drawing a roadbed section schematic diagram.
2. The method for rapidly constructing a roadbed section based on the network map service is characterized in that in the step S1, the digital elevation model network map service is manufactured into a digital elevation model after topographic information is collected or collected by a measurement professional and is released as the network map service, and line position information, hectometer marks and kilometer marks in the line network map service are provided by a line professional and are released as the network map service.
3. The method for rapidly constructing a roadbed section based on the network map service, wherein in the step S3, the position point selected in the step S2 is taken as a sphere center, and the radius of the sphere is continuously enlarged until the sphere is tangent to the route, wherein the obtained tangent point is the closest point.
4. The method according to claim 1, wherein in step S4, two kilometers posts and two hectometer posts closest to the closest point on the route are searched for in the route network map service, the mileage information of the closest point is calculated according to the kilometer posts and the hectometer posts, and the elevation information of the closest point on the line position is directly read from the route elevation of the closest point.
5. The method for quickly constructing a roadbed section based on the network map service, according to claim 1, wherein the step S6 specifically comprises: and defining a surface which passes through the straight line section and is vertical to the horizontal plane as a vertical plane, defining a section of terrain contour line by the 200m straight line section, projecting the section of terrain contour line onto the horizontal plane to form the 200m straight line section, and acquiring elevation information along the section of terrain contour line in the digital elevation model network map service to obtain a terrain section line.
6. The method for quickly constructing a subgrade section based on the network map service according to claim 5, wherein in the network map service of the digital elevation model, the obtaining of the elevation information along the topographic contour line of the section specifically comprises:
s21, setting a point element at equal intervals along the straight line segment, wherein each point element corresponds to a topographic point on the topographic contour line, and recording the distance from each point element to the leftmost end of the straight line segment;
s22, acquiring elevation information of topographical points corresponding to all set point elements in the digital elevation model network map service;
and S23, determining a plurality of discrete points by taking the distance from the point element to the leftmost end of the straight line segment as an abscissa and taking the elevation information of the topographic point corresponding to the point element as an ordinate, and sequentially arranging the discrete points according to the size of the abscissa, so that the topographic section lines are obtained by connecting the discrete points.
7. The method according to claim 1, wherein in step S7, the preset design parameters include roadbed width, side ditch size, abutment height, embankment slope rate, embankment slope height, cutting slope rate, cutting slope height and slope platform width, and the automatic calculation of the roadbed profile from the closest point to the terrain profile according to the roadbed profile base rule specifically includes:
s31, extending from the closest point to the left side and the right side according to the width of the roadbed to obtain the positions of left and right road shoulders;
s32, judging the relation between the shoulder and the terrain profile line so as to determine whether the side is a embankment side slope or a cutting side slope, if so, executing steps S33-S34, and if so, executing steps S35-S36;
s33, if the embankment side slope is the embankment side slope, gradually releasing the embankment side slope according to the preset embankment side slope rate, the height of the embankment side slope and the width of a side slope platform, and stopping releasing the embankment side slope when the height of the bottom of the embankment side slope is lower than a terrain section line;
s34, solving an intersection point of the embankment side slope contour line and the terrain section line, and cutting to remove the part of the embankment side slope contour line below the terrain section line;
s35, if the cutting slope is the cutting slope, drawing a part of contour lines according to the size of the side ditches and the height of the supporting stops, grading the slope according to the slope rate of the cutting slope, the height of the cutting slope and the width of a slope platform, and stopping slope grading when the height of the top of the cutting is higher than the terrain profile line;
s36, solving the intersection point of the cutting slope contour line and the terrain profile line, and cutting to remove the part of the cutting slope contour line above the terrain profile line;
and S37, synthesizing the roadbed contour obtained in the step S31 and the roadbed contour outside the road shoulder obtained in the steps S32-S36, and splicing to obtain a complete roadbed contour.
8. The method for quickly constructing a subgrade section based on the network map service according to claim 1, further comprising after step S9: and drawing a three-dimensional roadbed contour line with a geographical coordinate by using the roadbed contour information obtained in the step S7 so as to enable the three-dimensional roadbed contour line to be intersected with a route in the line network map service.
9. An electronic device, comprising a processor and a memory, the memory having stored thereon a computer program which, when executed by the processor, carries out the method of any one of claims 1 to 8.
10. A readable storage medium, characterized in that a computer program is stored in the readable storage medium, which computer program, when being executed by a processor, carries out the method of any one of claims 1 to 8.
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