Profile data derivation system, profile data derivation method, profile data derivation program, evaluation value calculation system, evaluation value calculation method, evaluation value calculation program, flatness determination system, flatness determination method and flatness determination program

Abstract

To determine, before performing a pavement construction, flatness of a road surface as of after performing the pavement construction.SOLUTION: A flatness determination system 1 of the present invention includes: a three-dimensional design surface data storage unit 11a that stores three-dimensional design surface data of a road surface to be used when a pavement construction is performed; an operation unit 3 that designates an investigation place on the road surface indicated by the three-dimensional design surface data stored in the three-dimensional design surface data storage unit 11a; a profile data derivation unit 13 that derives profile data corresponding to altitudes at a plurality of positions on the investigation place designated by the operation unit 3 on the basis of the three-dimensional design surface data stored in the three-dimensional design surface data storage unit 11a; an evaluation value calculation unit 14 that calculates an IRI value for evaluating flatness on the basis of the profile data derived in the profile data derivation unit 13; and a flatness evaluation unit 15 that determines flatness of the investigation place on the basis of the IRI value calculated in the evaluation value calculation unit 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a profile data derivation system, a profile data derivation method, a profile data derivation program, an evaluation value calculation system, an evaluation value calculation method, an evaluation value calculation program, a flatness determination system, a flatness determination method, and a flatness determination program, which are used, for example, when determining the flatness of a road surface on which paving work is being carried out. [Background technology]

[0002] Roads need to be repaired because unevenness occurs when vehicles pass over them, and when repairs are carried out, data on the unevenness of the road surface is collected. After that, 3D design data is created, which is a repair plan showing how the repairs should be carried out based on the unevenness of the road surface, and paving work is carried out based on that 3D design data.

[0003] Regarding the unevenness of the road surface, the International Roughness Index (IRI) is known as an index that expresses the unevenness of the road surface in order to evaluate the ride comfort of an automobile (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 5-113328 Summary of the Invention [Problem to be solved by the invention]

[0005] When creating 3D design data for pavement construction, different ideas about how to perform repairs will result in different 3D design data. For example, when performing pavement construction for the same repair location, if multiple designers each create 3D design data, the 3D design data will generally be different from each other.

[0006] Furthermore, in the past, when creating 3D design data for paving work, emphasis was placed on whether the thickness of the newly laid layer was greater than or equal to a specified thickness. If paving work was carried out based on 3D design data created with an emphasis on controlling the thickness of the newly laid layer, the International Roughness Index of the road surface after repairs could be high, resulting in very poor road surface flatness.

[0007] Furthermore, in the past, it was not possible to evaluate the flatness of the road surface until repairs had actually been carried out based on 3D design surface data, so in some cases the road surface repairs had to be redone due to poor flatness after repair work.

[0008] The present invention has been made with an eye on such problems, and aims to provide a profile data derivation system, a profile data derivation method, a profile data derivation program, an evaluation value calculation system, an evaluation value calculation method, an evaluation value calculation program, a flatness determination system, a flatness determination method, and a flatness determination program that enable the determination of the flatness of a road surface after repair work based on three-dimensional design surface data before the road surface repair work is carried out. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention takes the following measures.

[0010] In other words, the profile data derivation system of the present invention is characterized by comprising a three-dimensional design surface data storage means for storing three-dimensional design surface data of the road surface used when carrying out paving work, a survey location designation means for designating a survey location on the road surface represented by the three-dimensional design surface data stored in the three-dimensional design surface data, and a profile data derivation means for deriving profile data corresponding to the elevations at multiple positions on the survey location designated by the survey location designation means based on the three-dimensional design surface data stored in the three-dimensional design surface data storage means.

[0011] The profile data derivation method according to the present invention is characterized by comprising a three-dimensional design surface data acquisition step of acquiring three-dimensional design surface data of a road surface used when carrying out paving work; an investigation location designation step of designating an investigation location on the road surface indicated by the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; and a profile data derivation step of deriving profile data corresponding to the elevations at multiple positions on the investigation location designated in the investigation location designation step based on the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step.

[0012] The profile data derivation program of the present invention is characterized in that, when loaded into a computer, it causes the computer to function as: a three-dimensional design surface data receiving means for receiving three-dimensional design surface data of a road surface used when carrying out paving work; a designation information receiving means for receiving designation information for specifying an investigation location on the road surface shown by the three-dimensional design surface data received by the three-dimensional design surface data receiving means; and a profile data derivation means for deriving profile data corresponding to the elevations at multiple positions on the investigation location specified by the designation information received by the designation information receiving means, based on the three-dimensional design surface data received by the three-dimensional design surface data receiving means.

[0013] As a result, the profile data derivation system, profile data derivation method, and profile data derivation program according to the present invention can derive profile data for an investigation location based on the 3D design data of the road surface used when carrying out paving work. Therefore, before carrying out paving work on the road surface, it is possible to determine the flatness of the road surface after paving work is carried out based on the 3D design data.

[0014] The evaluation value calculation system according to the present invention is characterized by comprising: a three-dimensional design surface data storage means for storing three-dimensional design surface data of a road surface used when carrying out paving work; an investigation location designation means for designating an investigation location on the road surface represented by the three-dimensional design surface data stored in the three-dimensional design surface data storage means; a profile data derivation means for deriving profile data corresponding to the elevations at a plurality of positions on the investigation location designated by the investigation location designation means based on the three-dimensional design surface data stored in the three-dimensional design surface data storage means; and an evaluation value calculation means for calculating an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation means.

[0015] The evaluation value calculation method according to the present invention is characterized by comprising a three-dimensional design surface data acquisition step of acquiring three-dimensional design surface data of a road surface used when carrying out paving work; an investigation location designation step of designating an investigation location on the road surface indicated by the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; a profile data derivation step of deriving profile data corresponding to elevations at a plurality of positions on the investigation location designated in the investigation location designation step based on the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; and an evaluation value calculation step of calculating an evaluation value for evaluating flatness based on the profile data derived in the profile data derivation step.

[0016] The evaluation value calculation program according to the present invention is characterized in that, when loaded into a computer, it causes the computer to function as: a three-dimensional design surface data receiving means for receiving three-dimensional design surface data of a road surface used when carrying out paving work; a designation information receiving means for receiving designation information for specifying an investigation location on the road surface shown by the three-dimensional design surface data received by the three-dimensional design surface data receiving means; a profile data derivation means for deriving profile data corresponding to the elevations at multiple positions on the investigation location specified by the designation information received by the designation information receiving means, based on the three-dimensional design surface data received by the three-dimensional design surface data receiving means; and an evaluation value calculation means for calculating an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation means.

[0017] As a result, the evaluation value calculation system, evaluation value calculation method, and evaluation value calculation program according to the present invention can calculate an evaluation value for determining the flatness of an investigation location based on the 3D design data of the road surface used when carrying out paving work. Therefore, before carrying out paving work on the road surface, it is possible to determine the flatness of the road surface after paving work is carried out based on the 3D design data.

[0018] The flatness determination system according to the present invention is characterized by comprising: a three-dimensional design surface data storage means for storing three-dimensional design surface data of a road surface used when carrying out paving work; an investigation location designation means for designating an investigation location on the road surface represented by the three-dimensional design surface data stored in the three-dimensional design surface data storage means; a profile data derivation means for deriving profile data corresponding to the elevations at a plurality of positions on the investigation location designated by the investigation location designation means based on the three-dimensional design surface data stored in the three-dimensional design surface data storage means; an evaluation value calculation means for calculating an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation means; and a flatness evaluation means for determining the flatness of the investigation location based on the evaluation value calculated by the evaluation value calculation means.

[0019] The flatness determination method of the present invention is characterized by comprising: a 3D design surface data acquisition step of acquiring 3D design surface data of a road surface used when carrying out paving work; an investigation location designation step of designating an investigation location on the road surface shown by the 3D design surface data acquired in the 3D design surface data acquisition step; a profile data derivation step of deriving profile data corresponding to elevations at multiple positions on the investigation location designated in the investigation location designation step based on the 3D design surface data acquired in the 3D design surface data acquisition step; an evaluation value calculation step of calculating an evaluation value for evaluating flatness based on the profile data derived in the profile data derivation step; and a flatness determination step of determining the flatness of the investigation location based on the evaluation value calculated in the evaluation value calculation step.

[0020] The flatness judgment program according to the present invention, when loaded into a computer, causes the computer to function as: a 3D design surface data accepting means for accepting 3D design surface data of a road surface used when carrying out paving work; a designation information accepting means for accepting designation information for designating an investigation location on the road surface shown by the 3D design surface data accepted by the 3D design surface data accepting means; a profile data derivation means for deriving profile data corresponding to the elevations at multiple positions on the investigation location designated by the designation information accepted by the designation information accepting means, based on the 3D design surface data accepted by the 3D design surface data accepting means; an evaluation value calculation means for calculating an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation means; and a flatness judgment means for evaluating the flatness of the investigation location based on the evaluation value calculated by the evaluation value calculation means.

[0021] As a result, the flatness determination system, flatness determination method, and flatness determination program of the present invention can determine the flatness of a road surface when paving work is carried out, before the road surface paving work is carried out, based on the three-dimensional design surface data of the road surface used when carrying out paving work. [Effects of the Invention]

[0022] As described above, according to the present invention, before paving work on a road surface is carried out, it is possible to determine the flatness of the road surface when paving work is carried out based on the three-dimensional design surface data. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a diagram showing a schematic configuration of a flatness determination system 1 according to an embodiment of the present invention. [Figure 2] FIG. 1 is a schematic diagram illustrating a longitudinal section plan. [Figure 3] FIG. 1 is a schematic diagram illustrating a cross-sectional plan. [Figure 4] FIG. 10 is a diagram illustrating a method for converting point cloud data into a three-dimensional TIN model to derive data for each point at a survey location. [Figure 5] FIG. 5(a) is a plan view of the two-lane road at the time of repair work commencement, and FIG. 5(b) is an enlarged view of the area around the manhole at the time of repair work commencement. [Figure 6] FIG. 1 is a schematic diagram showing the elevation of the area around a manhole. [Figure 7] FIG. 10 is a diagram illustrating how to create three types of repair plan surfaces. [Figure 8] FIG. 1 is a diagram showing an example of linear survey points on a road surface. [Figure 9] FIG. 10 is a diagram showing longitudinal profile data. [Figure 10] This figure shows the IRI values of surveyed areas for three types of repair plans. [Figure 11] 2 is a diagram illustrating a flatness determination method of the flatness determination system 1 of FIG. 1. FIG. [Figure 12] FIG. 10 is a diagram illustrating a modified example of a method for deriving data for each point in a survey location. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0025] A flatness determination system 1 according to an embodiment of the present invention includes a flatness determination device 2, and an operation unit 3 and a display screen 5 connected to the flatness determination device 2. The flatness determination device 2 includes an import device 2a and is configured to be able to import data from outside via the import device 2a.

[0026] 1, the flatness determination device 2 has a control unit 10, which is configured, for example, by a microcomputer and includes a CPU, a ROM storing a program for controlling the operation of the flatness determination device 2, and a RAM for temporarily storing data used when executing the program. That is, the control unit 10 is mainly configured by a normal microcomputer including a CPU, memory, and interface, and performs predetermined calculations and processing in accordance with a flatness determination program stored in the memory, and determines flatness based on the data captured by the capture device 2a in cooperation with peripheral hardware.

[0027] The control unit 10 of the flatness determination device 2 has a 3D design surface data receiving unit 11 including a 3D design surface data storage unit 11a, a specified information receiving unit 12, a profile data derivation unit 13, an evaluation value calculation unit 14, and a flatness determination unit 15. The control unit 10 of the flatness determination device 2 is also connected to an operation unit 3 and a display screen 5.

[0028] The three-dimensional design surface data receiving unit 11 receives the three-dimensional design surface data supplied from the import device 2a. The three-dimensional design surface data received by the three-dimensional design surface data receiving unit 11 is stored in a three-dimensional design surface data storage unit 11a.

[0029] The 3D design surface data is the 3D design surface data of the road surface used when carrying out paving work, and is 3D data that shows the planned surface of the road surface on which paving work will be carried out. In other words, the 3D design surface data includes data corresponding to the latitude, longitude, and altitude (height) of each point on the planned surface of the road surface on which paving work will be carried out.

[0030] When creating 3D design data for road surfaces to be used in paving work, first, data on the unevenness of the road surface at the time of starting repair work is acquired using a 3D scanner 2. The 3D scanner 2 irradiates the road surface with laser light to acquire each point on the road surface and its surroundings as 3D coordinated point cloud data (a collection of elevations with horizontal position coordinates).

[0031] Once data on the unevenness of the road surface at the time of commencement of repair work is obtained, three-dimensional design data is created that shows a repair plan for improving the unevenness of the road surface.

[0032] The repair planning surface includes longitudinal and transverse plans, and after longitudinal planning along the longitudinal direction of the road is performed, transverse planning along the transverse direction at multiple locations on the road is performed to obtain the repair planning surface to be used when repairing. Therefore, the repair planning surface includes planning surface data indicating the longitudinal planning surface and planning surface data indicating multiple transverse planning surfaces.

[0033] A longitudinal plan includes a plan for the elevation of each point on a line along the longitudinal direction of the road in the center of the road. For example, Figure 2 shows a longitudinal plan surface for the elevation of each point on a line along the center of the road. In Figure 2, a repair area that requires a repair plan is located between an unrepaired area on the left and an unrepaired area on the right. The repair area in Figure 2 is shown with an elevation change based on point cloud data and a longitudinal plan surface.

[0034] The longitudinal section plan shown in Figure 2 is obtained by connecting the elevations at each point on a line along the center of the road, after the elevations at each point are planned taking into account factors such as the flatness of the road. The positions on the line along the center of the road are, for example, every 10 meters or every 20 meters.

[0035] In longitudinal planning, elevations at each position on a line along the center of the road are planned, followed by cross-sectional planning. Cross-sectional planning is a plan for the elevations of each point on a line along the cross-sectional direction of the road at each position on the line along the center of the road. For example, Figure 3 shows a cross-sectional planning surface for the elevations of each point on a line along the cross-sectional direction of the road at point a in Figure 2. In Figure 3, a repair area requiring a repair plan is located between the left and right ends of the road. The cross-sectional planning surface is also shown at the repair area, along with elevation changes based on point cloud data. In Figure 3, the slope of the road is exaggerated for clarity.

[0036] The cross-section planning surface is obtained by planning each position on the line along the center of the road shown in Figure 2, taking into consideration the gradient of the slope that slopes downward from the elevation of the center of the road toward both ends of the road. For example, when planning a cross-section of a road, it is generally designed so that it slopes downward at a predetermined gradient from the center of the road toward the ends of the road.

[0037] For example, in the cross-sectional plan of FIG. 3, the elevation of the road center at point a on the longitudinal plan of FIG. 2 decreases to point a1 along a slope that slopes downward at a predetermined gradient toward both ends of the road. The elevation then decreases along connecting surfaces that connect point a1 to the left and right ends of the road. Therefore, when repairs are made based on the cross-sectional plan, the surface layer of the asphalt pavement formed at the repaired area is connected to the concrete portions at the left and right ends of the road without any steps. Note that the cross-sectional plan of FIG. 3 is an example of a cross-sectional plan, and cross-sectional planning methods are not limited to this. Therefore, a cross-sectional plan may be designed, for example, so that slopes that slope downward at different gradients from the road center toward the road edges are connected.

[0038] By connecting the cross-sectional planning surfaces at each position on the line along the center of the road obtained as described above in the longitudinal direction, a repair planning surface (3D design surface data) for repairing the road surface can be obtained.

[0039] In terms of repair planning, each point designed by the longitudinal and cross-sectional plan can be converted into a three-dimensional TIN model (irregular triangular network), which is a collection of triangular planes connected as vertices, and data corresponding to the latitude, longitude, and elevation of each point on the road surface can be derived.Even if each point in the survey area has not been obtained by the longitudinal and cross-sectional plan, it is possible to derive data corresponding to the latitude, longitude, and elevation of each point.

[0040] Specifically, in Figure 4, when points A1, A2, and A3 are acquired through a longitudinal and cross-sectional plan, they are converted into a three-dimensional TIN model, which is a collection of triangular planes connected with points A1, A2, and A3 as vertices. Points a1 and a2 on the linear survey location are considered to be inside the triangular plane and on a plane that passes through points A1, A2, and A3, and data corresponding to the elevations at points a1 and a2 are derived.

[0041] Below, as a specific example of a method for creating three-dimensional design surface data, a method for creating three-dimensional planning surface data showing a repair plan surface for the area around a manhole will be described.

[0042] FIG. 5(a) is a plan view of a two-lane road at the time of repair work commencement, with a manhole installed in the upper lane. FIG. 5(b) is an enlarged view of the area around the manhole at the time of repair work commencement. FIG. 5(b) illustrates part of the data on the unevenness of the road surface around the manhole. In this embodiment, we will explain a case where, on a line along the transverse direction, the elevations of two planar positions N1 and N2 located on the outside of the road from the manhole are n1 meters and n2 meters, and the elevations of two planar positions N3 and N4 located on the inside of the road from the manhole are n3 meters and n4 meters.

[0043] Fig. 6 is a schematic diagram showing the elevations of the area around a manhole, and shows the elevations of the points shown in Fig. 5(b). In this embodiment, the elevation of planar position N1 is t1 cm higher than the elevation T1 of the manhole, the elevation of planar position N2 is t2 cm lower than the elevation T1 of the manhole, the elevation of planar position N3 is t3 cm higher than the elevation T1 of the manhole, and the elevation of planar position N4 is t4 cm higher than the elevation T1 of the manhole.

[0044] In this way, when the elevations of planar positions N1 to N4 in the area surrounding the manhole are lower than the elevation T1 of the manhole, three-dimensional design surface data is created so that the elevation difference is reduced. Figures 7(a) to 7(c) show a design method for the area surrounding a manhole that includes three-dimensional design surface data.

[0045] For example, in the three-dimensional design surface data A shown in Figure 7(a), a repair plan surface is created so that the elevations of planar positions N1 to N4 are slightly higher than the manhole elevation T1, without changing the manhole elevation T1. For example, in the three-dimensional design surface data A, the gradient between N1 and N2 and the gradient between N3 and N4 are the same constant gradient, and if N2 and N3 are connected, the gradient from N1 to N4 will be the same constant gradient.

[0046] In the three-dimensional design surface data B shown in Figure 7(b), the repair plan surface is created so that the elevations of planar positions N1 to N4 are slightly lower than the manhole elevation T1 without changing the manhole elevation T1. For example, in the three-dimensional design surface data A, the gradient between N1 and N2 and the gradient between N3 and N4 are the same constant gradient, and if N2 and N3 are connected, the gradient from N1 to N4 will be the same constant gradient.

[0047] In the three-dimensional design surface data C shown in Figure 7(c), the repair plan surface is created so that the manhole elevation T1 remains unchanged, but the elevations of planar positions N1 to N2 are slightly lower than the manhole elevation T1, and the elevations of planar positions N3 to N4 are slightly lower than the manhole elevation T1.

[0048] As shown in Figures 7(a) to 7(c), when repair plans for eliminating road surface irregularities around a manhole are created based on different repair methods, the resulting repair plans will be different. When carrying out construction work over a long span, such as on a road, it is desirable for the road gradient on the repair plan to be the same constant gradient across the entire area in either the longitudinal or transverse direction in order to ensure flatness. However, if there are ancillary structures such as manholes, the gradient must be adjusted locally to match the elevation of the ancillary structures, which can result in a distorted shape, as shown in Figures 7(a) and 7(b).

[0049] Figures 7(a) to 7(c) show design methods for the area around the manhole, but if areas other than the area around the manhole are created based on different repair methods, the repair plan surfaces will be different from each other.

[0050] The specified information receiving unit 12 receives and stores specified information about a linear survey location on the road surface specified by operating the operation unit 3. Specifically, when a start point (origin), an end point, and a route between the start point and the end point are specified in the 3D design surface data displayed on the display screen 5 by operating the operation unit 3, the specified information receiving unit 12 stores the specified information about the linear survey location.

[0051] In this embodiment, to inspect the smoothness of the road surface, a linear inspection point A1 is specified along a position a1 100 cm toward the shoulder from the center of the lane, or a linear inspection point A2 is specified along a position a2 where the outside wheel passes on the road lane, as shown in Fig. 8. For example, the International Roughness Index can be calculated if there is a longitudinal profile created based on data corresponding to the latitude, longitude, and altitude of each point on one linear inspection point.

[0052] In this way, when a linear inspection location A1 is specified, the specified information receiving unit 12 receives, as specified information, specified information about the start point 1, the end point 1, and the linear route between the start point 1 and the end point 1. Furthermore, when a linear inspection location A2 is specified, the specified information receiving unit 12 receives, as specified information, specified information about the start point 2, the end point 2, and the linear route between the start point 2 and the end point 2.

[0053] The method for specifying the linear survey location is arbitrary, and for example, the latitude and longitude of the start point and the latitude and longitude of the end point may be specified numerically, and the route between them may be specified as a straight line. Alternatively, the start point and end point may be specified by points on the screen where the 3D design surface data is displayed on the display screen 5, and the route between them may be specified as a straight line.

[0054] The profile data derivation unit 13 derives data corresponding to the elevations at multiple positions on the survey location included in the 3D design surface data, and creates profile data of the road surface, i.e., a longitudinal profile (showing changes in road surface elevation). In this embodiment, the longitudinal profile of the road surface includes data corresponding to the latitude, longitude, and elevation of the start point, data corresponding to the latitude, longitude, and elevation of the end point, and data corresponding to the latitude, longitude, and elevation at equal intervals on the route between the start point and the end point.

[0055] In this embodiment, the profile data derivation unit 13 extracts data at intervals of 25 cm or less (at equal intervals of 25 cm in this embodiment) on the route between the start point and the end point to create a longitudinal profile of the road surface. The intervals at which data is extracted on the route between the start point and the end point can be set arbitrarily.

[0056] Specifically, the profile data derivation unit 13 derives the latitude and longitude of each point at a predetermined interval on the route between the start point and the end point based on the latitude and longitude of the start point and the latitude and longitude of the end point, and also derives the elevation for each point. That is, the profile data derived by the profile data derivation unit 13 includes latitude, longitude, and elevation data for each point at a predetermined interval on the survey location. The profile data indicates a cross section of the road along its longitudinal direction (changes in road surface elevation).

[0057] The longitudinal profile created by the profile data derivation unit 13 includes data corresponding to latitude, longitude, and altitude at equal intervals along a linear survey location, as shown in Fig. 9. In Fig. 9, a, b, and c are numerical values indicating latitude, longitude, and altitude, respectively. In Fig. 9, data No. 1 is data corresponding to the latitude, longitude, and altitude at the start point, data No. n is data corresponding to the latitude, longitude, and altitude at the end point, and data Nos. 2 to n-1 are data corresponding to the latitude, longitude, and altitude at equal intervals along the route between the start point and the end point.

[0058] The evaluation value calculation unit 14 calculates an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation unit 13. In this embodiment, the evaluation value for evaluating flatness is the International Roughness Index (IRI), which represents the unevenness of a road surface as an index for evaluating the ride comfort of a car.

[0059] The calculation of the IRI value in the evaluation value calculation unit 14 is generally performed by a computer using a calculation program that uses profile data of the road surface. A typical example of this calculation program is software called Proval. For example, the IRI value can be calculated if there is a longitudinal profile created based on data corresponding to the latitude, longitude, and altitude of each point in a linear survey location.

[0060] The flatness determination unit 15 determines the flatness of the survey location based on the IRI value calculated by the evaluation value calculation unit 14. The flatness determination unit 14 determines that the flatness is better as the IRI value is smaller. In this embodiment, the flatness determination unit 14 determines that the flatness is good when the IRI value is 3 or less.

[0061] A specific example of the evaluation in the flatness determining unit 15 is as follows. When the IRI value is between 0 (completely flat) and 3 mm / m: Damage level: Minor (desirable management level): Same level as a newly constructed pavement. The unevenness of the road surface is not noticeable. (For a good asphalt pavement surface, the IRI value is approximately 1.4 to 2.4 mm / m.)

[0062] If the IRI value is around 3 to 8 mm / m: Damage level: Medium (repair required) This is an old pavement that has deteriorated considerably.

[0063] If the IRI value is 8mm / m or more: Damage level: Severe (urgent repairs required) In the case of old pavement, deterioration has progressed and clear damage has occurred continuously.

[0064] As mentioned above, it was found that when repair plans for eliminating road surface irregularities around a manhole are created based on different repair methods, the resulting repair plans will be different. Therefore, even if the same survey location is specified in 3D design surface data A, B, and C, as shown in Figures 10(a) to 10(c), the profile data for that survey location will be different for each of the 3D design surface data A, B, and C, and the IRI values calculated from that profile data will also be different for each of the 3D design surface data A, B, and C.

[0065] In the three-dimensional design surface data A, B, and C shown in Fig. 10(a) to Fig. 10(c), the IRI values calculated from the profile data on the surveyed area are C A , C B , C CIf this is the case, the flatness of the surveyed area can be determined based on the magnitude of the IRI value.

[0066] For example, the IRI values of 3D design surface data A, B, and C are C A <C B <C C If this is the case, then, when road surface paving work is carried out based on each of the three-dimensional design surface data A, B, and C, it is thought that the flatness of the surveyed area for paving work will be best for three-dimensional design surface data A and worst for three-dimensional design surface data C. In other words, for example, if the IRI value of the three-dimensional design surface data is 2.994, then when paving work is carried out based on that three-dimensional design surface data, the flatness of the surveyed area will be good, whereas if the IRI value of the three-dimensional design surface data is 4.232, then when paving work is carried out based on that three-dimensional design surface data, the flatness of the surveyed area will be poor, and despite the paving work having been carried out, the road surface will be so flat that repairs will be necessary.

[0067] In this way, by creating multiple repair plan surfaces to eliminate unevenness in the road surface around the manhole and calculating the IRI value based on the profile data of the same survey location on those repair plan surfaces (3D design surface data), it is possible to evaluate the flatness of the survey location when paving work is carried out based on those repair plan surfaces at the stage when the repair plan surface is created.

[0068] In other words, by comparing the IRI values of the surveyed locations in the repair plan for each case, it is possible to evaluate which repair plan is better before carrying out road surface paving work, such as whether it is better to adjust the road surface to the height of the manhole without changing the height of the manhole, or whether it is better to raise or lower the manhole height and then adjust the road surface to the height of the manhole after the height has been changed.

[0069] In addition, in the three-dimensional design surface data A, B, and C shown in Figures 10(a) to 10(c), the magnitude of the IRI value of one survey location is compared, but in the three-dimensional design surface data A, B, and C, the magnitude of the IRI values of multiple survey locations may also be compared.

[0070] As explained above, when evaluating 3D design surface data, if emphasis is placed on the thickness of the newly laid layer as in the past, the smoothness of the road surface after paving work may deteriorate. However, by placing emphasis on the smoothness of the road surface after paving work, it is possible to ensure that the smoothness of the road surface after paving work is good.

[0071] If the road surface is not smooth after paving work, bouncing cars can cause the pavement to warp, and even a small indentation caused by a small amount of wear can become larger with each bounce, shortening the lifespan of the road surface.In contrast, if the road surface is smooth after paving work, cars will not bounce, which can extend the lifespan of the road surface.

[0072] If the road surface is not smooth after paving work, vehicles will have to drive on a bumpy road, making loud noises day and night, causing noise pollution to nearby residents. In particular, trucks cause significant noise pollution, and the worse the smoothness, the louder the cargo in their loading compartments will rattle. In contrast, if the road surface is smooth after paving work, it will be possible to reduce noise.

[0073] Vehicles have better fuel efficiency when they run on flat roads with less frictional resistance. Therefore, if the road surface is poorly smooth after paving work, the vehicle's fuel efficiency will deteriorate, resulting in more fuel being used and more exhaust gas, which will contribute to environmental degradation around the road and global warming. In contrast, if the road surface is smooth after paving work, it will be possible to prevent a deterioration in vehicle fuel efficiency.

[0074] The flatness determination method in the flatness determination system 1 of this embodiment will be described with reference to FIG.

[0075] In step S1, separately created three-dimensional design surface data (repair plan surface) for the area where paving work is to be performed is supplied to the flatness determination device 2. The three-dimensional design surface data receiving unit 11 receives the three-dimensional design surface data and stores the data in the three-dimensional design surface data storage unit 11a.

[0076] In step S2, the operation unit 5b is operated to specify a linear inspection location on the road surface of the 3D design surface data. The specification information receiving unit 12 receives specification information about the inspection location specified based on the operation of the operation unit 3, and stores the specification information.

[0077] In step S3, the profile data derivation unit 14 derives profile data on the survey location based on the three-dimensional design surface data.

[0078] In step S4, the evaluation value calculation unit 14 calculates the IRI value for the survey location based on the profile data.

[0079] In step S5, the flatness determination unit 15 determines the flatness of the surveyed point based on the IRI value.

[0080] The flatness determination system 1 of this embodiment includes a 3D design surface data storage unit 11a that stores 3D design surface data of the road surface used when carrying out paving work, an operation unit 3 that specifies an investigation location on the road surface indicated by the 3D design surface data stored in the 3D design surface data storage unit 11a, a profile data derivation unit 13 that derives profile data corresponding to the elevations at multiple positions on the investigation location specified by the operation unit 3 based on the 3D design surface data stored in the 3D design surface data storage unit 11a, an evaluation value calculation unit 14 that calculates an IRI value for evaluating flatness based on the profile data derived by the profile data derivation unit 13, and a flatness evaluation unit 15 that determines the flatness of the investigation location based on the IRI value calculated by the evaluation value calculation unit 14.

[0081] The flatness determination method of this embodiment includes a three-dimensional design surface data acquisition step of acquiring three-dimensional design surface data of the road surface used when carrying out paving work; an investigation location designation step of designating an investigation location on the road surface shown by the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; a profile data derivation step of deriving profile data corresponding to the elevations at multiple positions on the investigation location designated in the investigation location designation step based on the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; an evaluation value calculation step of calculating an IRI value for evaluating flatness based on the profile data derived in the profile data derivation step; and a flatness determination step of determining the flatness of the investigation location based on the IRI value calculated in the evaluation value calculation step.

[0082] The flatness judgment program of this embodiment, when loaded into a computer, causes the computer to include: a three-dimensional design surface data receiving unit 11 that receives three-dimensional design surface data of the road surface used when carrying out paving work; a designation information receiving unit 12 that receives designation information that specifies an investigation location on the road surface shown by the three-dimensional design surface data received by the three-dimensional design surface data receiving unit 11; a profile data derivation unit 13 that derives profile data corresponding to the elevations at multiple positions on the investigation location specified by the designation information received by the designation information receiving unit 12 based on the three-dimensional design surface data received by the three-dimensional design surface data receiving unit 11; an evaluation value calculation unit 14 that calculates an IRI value for evaluating flatness based on the profile data derived by the profile data derivation unit 13; and a flatness judgment unit 15 that evaluates the flatness of the investigation location based on the IRI value calculated by the evaluation value calculation unit 14.

[0083] As a result, the flatness determination system 1, flatness determination method, and flatness determination program of this embodiment can determine the flatness of the road surface when paving work is carried out, before the road surface paving work is carried out, based on the three-dimensional design surface data of the road surface used when carrying out paving work.

[0084] The above describes an embodiment of the present invention, but the specific configuration of each part is not limited to the above-described embodiment, and various modifications are possible within the scope of the spirit of the present invention.

[0085] In the above embodiment, a flatness determination method has been described in which three-dimensional design surface data is acquired (S1), an inspection location is specified (S2), profile data is derived (S3), an evaluation value is calculated (S4), and flatness is determined (S5), but the present invention is not limited to this.

[0086] As a modification of the above embodiment, there is an evaluation value calculation method that calculates an evaluation value by acquiring 3D design surface data (S1), specifying an investigation location (S2), deriving profile data (S3), and calculating an evaluation value (S4). The same applies to the evaluation value calculation system and evaluation value calculation program according to this modification.

[0087] The evaluation value calculation system 1 of this modified example comprises a three-dimensional design surface data storage unit 11a that stores three-dimensional design surface data of the road surface used when carrying out paving work, an operation unit 3 that specifies an investigation location on the road surface indicated by the three-dimensional design surface data stored in the three-dimensional design surface data storage unit 11a, a profile data derivation unit 13 that derives profile data corresponding to the elevations at multiple positions on the investigation location specified by the operation unit 3 based on the three-dimensional design surface data stored in the three-dimensional design surface data storage unit 11a, and an evaluation value calculation unit 14 that calculates an IRI value for evaluating flatness based on the profile data derived by the profile data derivation unit 13.

[0088] The evaluation value calculation method of this modified example includes a three-dimensional design surface data acquisition step of acquiring three-dimensional design surface data of the road surface used when carrying out paving work; an investigation location designation step of designating an investigation location on the road surface indicated by the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; a profile data derivation step of deriving profile data corresponding to the elevations at multiple positions on the investigation location designated in the investigation location designation step based on the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; and an evaluation value calculation step of calculating an IRI value for evaluating flatness based on the profile data derived in the profile data derivation step.

[0089] When the evaluation value calculation program of this modified example is loaded into a computer, it causes the computer to function as a three-dimensional design surface data receiving unit 11 that receives three-dimensional design surface data of the road surface used when carrying out paving work, a specified information receiving unit 12 that receives specification information that specifies an investigation location on the road surface shown by the three-dimensional design surface data received by the three-dimensional design surface data receiving unit 11, a profile data derivation unit 13 that derives profile data corresponding to the elevations at multiple positions on the investigation location specified by the specification information received by the specification information receiving unit 12 based on the three-dimensional design surface data received by the three-dimensional design surface data receiving unit 11, and an evaluation value calculation unit 14 that calculates an IRI value for evaluating flatness based on the profile data derived by the profile data derivation unit 13.

[0090] As a result, the evaluation value calculation system, evaluation value calculation method, and evaluation value calculation program of this modified example can calculate an evaluation value for determining the flatness of an investigation location based on the 3D design surface data of the road surface used when carrying out paving work. Therefore, before carrying out paving work on the road surface, it is possible to determine the flatness of the road surface after paving work is carried out based on the 3D design surface data.

[0091] A modified example of the above embodiment is a profile data derivation method that derives profile data by acquiring 3D design surface data (S1), specifying an investigation location (S2), and deriving profile data (S3). The same applies to the profile data derivation system and profile data derivation program according to this modified example.

[0092] The profile data derivation system 1 of this modified example comprises a three-dimensional design surface data storage unit 11a that stores three-dimensional design surface data of the road surface used when carrying out paving work, an operation unit 3 that specifies an investigation location on the road surface indicated by the three-dimensional design surface data stored in the three-dimensional design surface data storage unit 11a, and a profile data derivation unit 13 that derives profile data corresponding to the elevations at multiple positions on the investigation location specified by the operation unit 3 based on the three-dimensional design surface data stored in the three-dimensional design surface data storage unit 11a.

[0093] The profile data derivation method of this modified example includes a three-dimensional design surface data acquisition step of acquiring three-dimensional design surface data of the road surface used when carrying out paving work, an investigation location designation step of designating an investigation location on the road surface indicated by the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step, and a profile data derivation step of deriving profile data corresponding to the elevations at multiple positions on the investigation location designated in the investigation location designation step based on the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step.

[0094] When the profile data derivation program of this modified example is loaded into a computer, it causes the computer to function as a three-dimensional design surface data receiving unit 11 that receives three-dimensional design surface data of the road surface used when carrying out paving work, a specified information receiving unit 12 that receives specification information that specifies an investigation location on the road surface shown by the three-dimensional design surface data received by the three-dimensional design surface data receiving unit 11, and a profile data derivation unit 13 that derives profile data corresponding to the elevations at multiple positions on the investigation location specified by the specification information received by the specified information receiving unit 12 based on the three-dimensional design surface data received by the three-dimensional design surface data receiving unit 11.

[0095] As a result, the profile data derivation system, profile data derivation method, and profile data derivation program according to this modification can derive profile data for an investigation location based on the 3D design data of the road surface used when carrying out paving work. Therefore, before carrying out paving work on the road surface, it is possible to determine the flatness of the road surface after paving work is carried out based on the 3D design data.

[0096] In the above embodiment, the International Roughness Index (IRI value) is used as the evaluation value for evaluating flatness, but the evaluation value is not limited to this. For example, the 3mσ value (3 meter sigma value) or other flatness σ values may be used as the evaluation value for evaluating flatness.

[0097] In the above embodiment, the International Roughness Index is calculated based on profile data of the road surface at a position a predetermined distance from the center of the lane toward the shoulder or at the position where the outside wheel passes on the road lane. However, the Half Car Roughness Index (HRI) and the IRI average value (MRI) of the left and right wheel driving positions may also be calculated based on longitudinal profiles of the road surface at a position a predetermined distance from the center of the lane toward the shoulder, at the position where the outside wheel passes on the road lane, and at the position where the inside wheel passes on the road lane.

[0098] In the above embodiment, a case has been described in which, for multiple 3D design surface data (repair plan data) for eliminating road surface irregularities around a manhole, the IRI values of the surveyed locations in the multiple 3D design surface data are compared to determine which of the multiple 3D design surface data has better flatness before road surface paving work is carried out. However, this is not limited to this. For example, in paving work at an intersection where a main line and a secondary line intersect, it is also possible to evaluate the flatness of the joint between the main line and the secondary line before road surface paving work is carried out. By creating multiple 3D design surface data with different ways of connecting the main line and the secondary line, it is possible to evaluate how the flatness changes depending on the connection method, or which connection method is best, before road surface paving work is carried out.

[0099] In the above embodiment, profile data is created by deriving data corresponding to latitude, longitude, and altitude at equal intervals at a linear survey location, but the data corresponding to latitude, longitude, and altitude at multiple positions at a linear survey location is not limited to data at equal intervals.

[0100] Furthermore, in the above embodiment, software called Proval is used to analyze the profile data, but software other than Proval can also be used as analysis software for analyzing the profile data.

[0101] In the above embodiment, the data corresponding to the latitude, longitude, and altitude of each point in the linear survey location is derived by converting the data into a three-dimensional TIN model (irregular triangular network), which is a collection of triangular planes. However, as shown in Figure 12, adjacent regions may be formed on both sides of the linear survey location, and data corresponding to the latitude, longitude, and altitude of each point in the linear survey location may be derived based on point cloud data within the adjacent regions. In Figure 12, if points A1, A2, and A3 on the linear survey location are obtained by a longitudinal and transverse plan, points a1 and a2 on the linear survey location may be obtained by selecting point cloud data (one or more point cloud data) that are near the points on the linear survey location from the point cloud data within the adjacent regions, and deriving data corresponding to the latitude, longitude, and altitude of each point in the linear survey location based on the point cloud data.

[0102] For example, data corresponding to the height of point a1 on a linear survey location may be derived based on the average heights of points A1 and A2, and data corresponding to the height of point a2 may be derived based on the average heights of points A1 and A3. The method of deriving data corresponding to the height of a point on a linear survey location based on point cloud data near a point on the linear survey location selected from point cloud data within the proximity area is not limited to this. The width of the proximity area on both sides of the linear survey location can be set arbitrarily. [Explanation of symbols]

[0103] 1 Flatness Judgment System 3 Control section 11 3D design surface data reception unit (3D design surface data reception means) 11a 3D design surface data storage unit (3D design surface data storage means) 12 Designated Information Reception Department 13 Profile data derivation unit (profile data derivation means) 14 Evaluation value calculation unit (evaluation value calculation means) 15 Flatness evaluation unit (flatness evaluation means)

Claims

1. a three-dimensional design surface data storage means for storing three-dimensional design surface data of a road surface used when carrying out paving work; an inspection location designation means for designating an inspection location on the road surface represented by the three-dimensional design surface data stored in the three-dimensional design surface data; and a profile data derivation means for deriving profile data corresponding to the elevations at a plurality of positions on the survey location specified by the survey location designation means, based on the three-dimensional design surface data stored in the three-dimensional design surface data storage means.

2. a three-dimensional design surface data acquisition step for acquiring three-dimensional design surface data of a road surface to be used when carrying out paving work; an investigation location designation step of designating an investigation location on the road surface represented by the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; a profile data derivation step of deriving profile data corresponding to the elevations at a plurality of positions on the survey location specified in the survey location designation step, based on the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step.

3. When loaded into a computer, the computer: a three-dimensional design surface data receiving means for receiving three-dimensional design surface data of a road surface to be used when carrying out paving work; a designation information receiving means for receiving designation information for designating an inspection location on the road surface represented by the three-dimensional design surface data received by the three-dimensional design surface data receiving means; A profile data derivation program characterized by functioning as profile data derivation means for deriving profile data corresponding to the elevations at multiple positions on the survey location specified by the designation information received by the designation information receiving means, based on the three-dimensional design surface data received by the three-dimensional design surface data receiving means.

4. a three-dimensional design surface data storage means for storing three-dimensional design surface data of a road surface used when carrying out paving work; an inspection location designation means for designating an inspection location on the road surface represented by the three-dimensional design surface data stored in the three-dimensional design surface data storage means; a profile data deriving means for deriving profile data corresponding to elevations at a plurality of positions on the survey location designated by the survey location designating means based on the three-dimensional design surface data stored in the three-dimensional design surface data storage means; An evaluation value calculation system comprising: evaluation value calculation means for calculating an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation means.

5. a three-dimensional design surface data acquisition step for acquiring three-dimensional design surface data of a road surface to be used when carrying out paving work; an investigation location designation step of designating an investigation location on the road surface represented by the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; a profile data derivation step of deriving profile data corresponding to elevations at a plurality of positions on the survey location designated in the survey location designation step, based on the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; an evaluation value calculation step of calculating an evaluation value for evaluating flatness based on the profile data derived in the profile data derivation step.

6. When loaded into a computer, the computer: a three-dimensional design surface data receiving means for receiving three-dimensional design surface data of a road surface to be used when carrying out paving work; a designation information receiving means for receiving designation information for designating an inspection location on the road surface represented by the three-dimensional design surface data received by the three-dimensional design surface data receiving means; a profile data deriving means for deriving profile data corresponding to elevations at a plurality of positions on the survey location designated by the designation information received by the designation information receiving means, based on the three-dimensional design surface data received by the three-dimensional design surface data receiving means; an evaluation value calculation program that functions as evaluation value calculation means for calculating an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation means;

7. a three-dimensional design surface data storage means for storing three-dimensional design surface data of a road surface used when carrying out paving work; an inspection location designation means for designating an inspection location on the road surface represented by the three-dimensional design surface data stored in the three-dimensional design surface data storage means; a profile data deriving means for deriving profile data corresponding to the elevations at a plurality of positions on the survey location designated by the survey location designating means, based on the three-dimensional design surface data stored in the three-dimensional design surface data storage means; evaluation value calculation means for calculating an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation means; A flatness determination system comprising a flatness evaluation means for determining the flatness of the surveyed location based on the evaluation value calculated by the evaluation value calculation means.

8. a three-dimensional design surface data acquisition step for acquiring three-dimensional design surface data of a road surface to be used when carrying out paving work; an investigation location designation step of designating an investigation location on the road surface represented by the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; a profile data derivation step of deriving profile data corresponding to elevations at a plurality of positions on the survey location designated in the survey location designation step, based on the three-dimensional design surface data acquired in the three-dimensional design surface data acquisition step; an evaluation value calculation step of calculating an evaluation value for evaluating flatness based on the profile data derived in the profile data derivation step; a flatness evaluation step of determining the flatness of the inspection location based on the evaluation value calculated in the evaluation value calculation step.

9. When loaded into a computer, the computer: a three-dimensional design surface data receiving means for receiving three-dimensional design surface data of a road surface to be used when carrying out paving work; a designation information receiving means for receiving designation information for designating an inspection location on the road surface represented by the three-dimensional design surface data received by the three-dimensional design surface data receiving means; a profile data deriving means for deriving profile data corresponding to elevations at a plurality of positions on the survey location designated by the designation information received by the designation information receiving means, based on the three-dimensional design surface data received by the three-dimensional design surface data receiving means; evaluation value calculation means for calculating an evaluation value for evaluating flatness based on the profile data derived by the profile data derivation means; A flatness determination program comprising flatness determination means for evaluating the flatness of the inspection location based on the evaluation value calculated by the evaluation value calculation means.

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