Pipeline renewal plan creation device, pipeline renewal plan creation, and pipeline renewal plan creation program

Abstract

[Problem] To provide a pipeline renewal plan creation device that can create an appropriate renewal plan by assigning an appropriate burial environment attribute even to a long pipeline. [Solution] A pipeline renewal plan creation device having: a data acquisition unit that acquires, from map information stored in a storage unit, pipeline data including the burial location of each pipeline constituting a pipeline network, and polygon data indicating the burial environment of the pipelines; a drawing processing unit that draws a pipeline diagram on the basis of the pipeline data, and performs drawing processing of burial environment polygons on the basis of the polygon data; an intersection extraction processing unit that extracts intersections between the individual pipelines constituting the pipeline network, and the burial environment polygons; a segmented pipeline creation processing unit that creates segmented pipelines resulting from segmenting the pipelines on the basis of the intersections; a segmented pipeline analysis processing unit that subjects the segmented pipelines to a deterioration level analysis or a hydraulic analysis; and a renewal plan creation processing unit that creates a renewal plan for the pipelines on the basis of the results of the analysis of the segmented pipelines.

Description

Pipeline replacement plan creation device, pipeline replacement plan creation, and pipeline replacement plan creation program

[0001] The present invention relates to a pipeline renewal plan creation device, pipeline renewal plan creation, and pipeline renewal plan creation program.

[0002] To address the aging of existing pipelines and mitigate earthquake damage, there is a need for efficient renewal plans for each pipeline that makes up the pipeline network.

[0003] Patent Document 1 proposes a buried environment identification device comprising a buried pipe data reading unit that reads buried pipe data including the location of the buried pipe, and a buried environment identification unit that applies the buried pipe data to a buried environment classification map created by a buried environment classification map creation device to identify the buried environment of the buried pipe.

[0004] The buried environment classification map creation device includes a first soil identification unit that identifies groundwater permeable soil, which is soil that easily allows groundwater to pass through, and a second soil identification unit that identifies soil among the groundwater permeable soils that is located within a predetermined distance from a water source containing salt and is at a predetermined elevation as highly corrosive soil that has high corrosivity to pipes.

[0005] Based on the understanding that the environment in which a pipeline is buried affects its corrosiveness, it is possible to predict the corrosion of a pipeline by applying the pipeline and its buried environment to a pre-established corrosion prediction model. The buried environment identification device described above is a technology that enables accurate corrosion prediction of the pipeline in such cases.

[0006] Japanese Patent Publication No. 2024-22150

[0007] When creating a pipeline renewal plan, cost-effectiveness can be improved by grouping the individual pipelines that make up the pipeline network and carrying out renewal work in groups.

[0008] However, if a long pipeline exists within a pipeline network, the total length of the grouped pipelines becomes long, making it difficult to address the issue in a single construction project. Furthermore, if a long pipeline spans different buried environments, setting one of these environments as the representative environmental attribute of that pipeline and applying it to the corrosion prediction model described above may yield results that do not reflect reality. In such cases, pipeline renewal plans based on these results may be economically unfeasible.

[0009] Traditionally, for pipelines laid across multiple underground environments, the underground environment with the highest proportion of the pipeline was selected as the representative environmental attribute, or the underground environment with the greatest impact on corrosion prediction was selected as the representative environmental attribute. As a result, some pipelines were not accurately represented, and there was a risk of overlooking pipelines that should have been given high priority for replacement.

[0010] The object of the present invention is to provide a pipeline renewal plan creation device, a pipeline renewal plan creation device, and a pipeline renewal plan creation program that can assign appropriate buried environmental attributes to even long pipelines and create an appropriate renewal plan.

[0011] To achieve the above objectives, the first characteristic configuration of the pipeline renewal plan creation device according to the present invention is a pipeline renewal plan creation device that creates a renewal plan for each pipeline constituting a pipeline network according to calculation processing by a processor, comprising: a data acquisition unit that acquires pipeline data including the buried location of each pipeline constituting the pipeline network, and polygon data in which the geology and / or ground in which the pipeline is buried is demarcated as the buried environment from map information stored in a storage unit; a drawing processing unit that draws a pipeline diagram on a pipeline diagram layer based on the pipeline data and draws buried environment polygons on a polygon layer based on the polygon data; an intersection extraction processing unit that extracts the intersections of individual pipelines constituting the pipeline diagram and the buried environment polygons by superimposing the two layers drawn by the drawing processing unit; a divided pipeline creation processing unit that creates divided pipelines by dividing the pipeline based on the intersections; a divided pipeline analysis processing unit that performs deterioration analysis or hydraulic analysis on the divided pipelines; and a renewal plan creation processing unit that creates a pipeline renewal plan based on the analysis results for the divided pipelines.

[0012] When a single pipeline is buried across multiple buried environmental polygons, the pipeline is divided at the boundaries of the buried environmental polygons. By assigning the environmental attributes associated with the buried environmental polygon to each divided pipeline, the results of the deterioration analysis or hydraulic analysis are output for each divided pipeline. This allows for the creation of an appropriate pipeline renewal plan.

[0013] The second characteristic configuration is that, in addition to the first characteristic configuration described above, the pipeline data and polygon data include coordinate information managed by a geographic information system (GIS), and the divided pipeline creation processing unit includes a divided pipeline length calculation processing unit that calculates the pipeline length of the divided pipeline based on the coordinate information.

[0014] It is possible to accurately calculate the length of the divided pipeline.

[0015] The third characteristic configuration is that, in addition to the first characteristic configuration described above, the divided pipeline creation processing unit includes a divided pipeline attribute data assignment processing unit that assigns the environmental attributes of the buried environment polygon to the divided pipeline belonging to the buried environment polygon.

[0016] Appropriate environmental attributes can be assigned to each segmented pipeline.

[0017] The fourth characteristic configuration is that, in addition to the first characteristic configuration described above, it has a pipe coupling processing unit that compares the analysis results of adjacent divided pipes and, if the difference is within an acceptable range, combines each divided pipe into a single pipe.

[0018] If the analysis results for each divided pipeline fall within the acceptable range, there is little point in dividing it further. By combining these divided pipelines into a single pipeline, subsequent processing can be carried out more smoothly.

[0019] The first characteristic configuration of the pipeline renewal plan creation method according to the present invention is a pipeline renewal plan creation method that creates a renewal plan for each pipeline constituting a pipeline network according to calculation processing by a processor, comprising: a data acquisition step of acquiring pipeline data including the buried location of each pipeline constituting the pipeline network, and polygon data in which the geology and / or ground in which the pipeline is buried is demarcated as the buried environment from map information stored in a memory unit; a drawing step of drawing a pipeline diagram on a pipeline diagram layer based on the pipeline data and drawing buried environment polygons on a polygon layer based on the polygon data; an intersection extraction step of extracting intersections between the individual pipelines constituting the pipeline diagram and the buried environment polygons by superimposing the two layers drawn in the drawing step; a divided pipeline creation step of creating divided pipelines by dividing the pipeline based on the intersections; a divided pipeline analysis step of performing deterioration analysis or hydraulic analysis on the divided pipelines; and a renewal plan creation step of creating a pipeline renewal plan based on the analysis results for the divided pipelines.

[0020] The second characteristic configuration is that, in addition to the first characteristic configuration described above, the pipeline data and polygon data include coordinate information managed by a geographic information system (GIS), and the divided pipeline creation step includes a divided pipeline length calculation step that calculates the pipeline length of the divided pipeline based on the coordinate information.

[0021] The third characteristic configuration is that, in addition to the first characteristic configuration described above, the divided pipeline creation step includes a divided pipeline attribute data assignment step in which the environmental attributes of the buried environment polygon are assigned to the divided pipeline belonging to the buried environment polygon.

[0022] The fourth characteristic configuration is that, in addition to the first characteristic configuration described above, it includes a pipeline coupling processing step in which the analysis results of adjacent divided pipelines are compared, and if the difference is within an acceptable range, the divided pipelines are coupled into a single pipeline.

[0023] The characteristic configuration of the pipeline renewal plan creation program according to the present invention is that it is a pipeline renewal plan creation program that causes a processor to execute each step of the pipeline renewal plan creation method having any of the first to fifth characteristic configurations described above.

[0024] As described above, the present invention provides a pipeline renewal plan creation device, a pipeline renewal plan creation device, and a pipeline renewal plan creation program that can assign appropriate buried environmental attributes to even long pipelines and create an appropriate renewal plan.

[0025] Figure 1 is an explanatory diagram of the pipeline renewal plan creation device according to the present invention. Figure 2A is an explanatory diagram of polygons that demarcate the geological environment and other elements of the buried environment. Figure 2B is an explanatory diagram showing a part of the pipelines that make up the pipeline network. Figure 2C is an explanatory diagram of pipelines that are divided based on the polygons. Figure 3 is an explanatory diagram of the pipeline attributes divided by the division process. Figure 4 is a flowchart of the pipeline division process. Figure 5A is an explanatory diagram of the hydraulic analysis method. Figure 5B is an explanatory diagram of the hydraulic analysis method.

[0026] The pipeline renewal plan creation device, pipeline renewal plan creation, and pipeline renewal plan creation program according to the present invention will be described below with reference to the drawings.

[0027] [Configuration of the pipeline replacement plan creation device] The pipeline replacement plan creation device 1 is composed of a general-purpose personal computer incorporating a motherboard equipped with a CPU, a memory board equipped with semiconductor memory, etc., and is connected to storage devices such as hard disks and SSDs, a touch-panel LCD display as a display unit, and input / output devices such as keyboards and mice as input units.

[0028] The storage device has an OS program installed to manage the system, and further installs application programs such as a pipeline renewal plan creation program, a hydraulic analysis program, and a deterioration analysis program, which are executed by the CPU under the management of the OS program. These application programs may be pre-written to storage media such as optical discs like CD-ROMs or DVD-ROMs, or non-volatile semiconductor memory such as USB memory, and configured to be read by a personal computer to the storage device.

[0029] Figure 1 shows the functional blocks of the pipeline renewal plan creation device 1. The pipeline renewal plan creation device 1 includes a job management unit 20, a data acquisition unit 21, a drawing processing unit 22, an intersection extraction processing unit 23, a divided pipeline creation processing unit 24, a divided pipeline analysis processing unit 25, a renewal plan creation processing unit 26, and so on. The divided pipeline creation processing unit 24 further includes a divided pipeline length calculation processing unit 24A, a divided pipeline attribute assignment processing unit 24B, and a pipeline coupling processing unit 24C. These functional blocks are realized by a pipeline renewal plan creation program and a CPU that executes the pipeline renewal plan creation program.

[0030] The memory unit 3 is composed of storage devices and is partitioned into data storage units such as a map information storage unit 30, a pipeline attribute data storage unit 31, a polygon data storage unit 32, an analysis result storage unit 33, and an update plan data storage unit 34.

[0031] The map information storage unit 30 stores map information and drawing data including the buried locations of existing pipeline networks associated with the map information, while the pipeline attribute data storage unit 31 stores attribute data for each pipeline constituting the existing pipeline network. Attribute data includes pipe type, nominal diameter, pipeline length, connection point location, and year of burial. The polygon data storage unit 32 stores polygon data demarcated by the burial environment characterized by the geology and / or ground of the area where the pipeline is buried, and serves as boundary data for the geology and / or ground indicating the burial environment. The pipeline data and polygon data are equipped with coordinate information (latitude, longitude) managed by a geographic information system (GIS).

[0032] Figure 2A shows polygons demarcated into burial environments A-D. The soil in which the pipes are buried is classified into four burial environments, A-D, according to the type of soil and soil resistivity. Burial environment A represents soil with a soil resistivity of less than 1500 Ω·cm or soil with equivalent corrosiveness to the buried pipe. Burial environment B represents clayey soil with a soil resistivity of 1500 Ω·cm or more or soil with equivalent corrosiveness to the buried pipe. Burial environment C represents silty soil with a soil resistivity of 1500 Ω·cm or more or soil with equivalent corrosiveness to the buried pipe. Burial environment D represents sandy soil with a soil resistivity of 1500 Ω·cm or more or soil with equivalent corrosiveness to the buried pipe. Of burial environments A-D, burial environment A has the highest corrosiveness to the buried pipe.

[0033] Based on survey data from approximately 6,000 locations throughout Japan regarding the relationship between the soil in which pipes are buried and the corrosion status of the pipes, a statistically significant correlation was found between burial environments A-D and the corrosion rate of the pipes. Furthermore, since the number of survey data points with the four burial environments A-D accounts for the majority of the total survey data, the pipes are classified into four burial environments: A-D.

[0034] Burial Environment A-D is a classification system based on the statistically significant correlation between the combination of classifications on surface geological maps (major and minor classifications) and topographic classification maps (major and minor classifications) and the burial environment A-D, which relates to the corrosion of buried pipes. The soil in which pipes are buried is classified into four categories, A-D, based on the combination of classifications on surface geological maps (major and minor classifications) and topographic classification maps (major and minor classifications).

[0035] The job management unit 20 is a functional block that manages a series of jobs necessary for creating a pipeline renewal plan. The data acquisition unit 21 acquires the buried positions and pipeline attribute data of each pipeline constituting the existing pipeline network from the map information storage unit 30 and the pipeline attribute data storage unit 31 stored in the storage unit 3, and also acquires polygon data in which the geology where the pipeline is buried and / or the ground is partitioned as the burial environment from the polygon data storage unit 32.

[0036] The drawing processing unit 22 is a functional block that draws a pipeline diagram on the pipeline diagram layer based on the pipeline data and performs a drawing process of the buried environment polygon on the polygon layer based on the polygon data. The intersection extraction processing unit 23 is a functional block that extracts the intersections of the individual pipelines constituting the pipeline diagram and the buried environment polygon by superimposing the two layers drawn by the drawing processing unit.

[0037] The divided pipeline creation processing unit 24 is a functional block that creates divided pipelines by dividing the pipeline based on intersections. The divided pipeline length calculation processing unit 24A is a functional block that calculates the extended lengths of the individual divided pipelines. The divided pipeline attribute assignment processing unit 24B is a functional block that assigns the burial environment attributes defined by the polygon corresponding to each of the divided pipelines. The pipeline connection processing unit 24C is a functional block that reconnects adjacent divided pipelines based on the analysis results.

[0038] The divided pipeline analysis processing unit 25 is a functional block that performs aging analysis or hydraulic analysis on the divided pipelines. The renewal plan creation processing unit 26 is a functional block that creates a pipeline renewal plan based on the analysis results for the divided pipelines.

[0039] In FIG. 2A, the buried environment polygon drawn on the polygon layer by the drawing processing unit 22 is shown. In FIG. 2B, the pipeline diagram drawn on the pipeline diagram layer by the drawing processing unit 22 is shown. The pipelines are connected at each of the intersections x1 to x4. Hereinafter, the description will continue focusing on the pipelines P1, P2, and P3 shown by solid lines.

[0040] The upper part of Figure 3 shows the relationship between each pipeline, its length, and the polygons it is laid on. Pipeline P1 has a length of 3000m and is laid across polygons A, B, and D; pipeline P2 has a length of 2000m and is laid across polygons C and D; and pipeline P3 has a length of 1000m and is laid on polygon C. Polygon A corresponds to the buried environment A, polygon B corresponds to the buried environment B, polygon C corresponds to the buried environment C, and polygon D corresponds to the buried environment D.

[0041] As shown in Figure 2C, the intersection extraction processing unit 23 extracts the intersections x12, x13, and x14 of the individual pipelines and buried environment polygons that make up the pipeline diagram by superimposing the two layers. For example, intersection x12 is the intersection of the boundary between polygon A and polygon D and pipeline P1.

[0042] The divided pipeline creation processing unit 24 creates divided pipelines by dividing pipeline P1 into three pipelines P11, P12, and P13 based on intersections x12 and x13. Then, the divided pipeline length calculation processing unit 24A calculates the pipeline length of pipeline P11 based on the coordinates of intersections X1 and X12, calculates the pipeline length of pipeline P12 based on the coordinates of intersections X12 and X13, and calculates the pipeline length of pipeline P13 based on the coordinates of intersections X13 and X2. Furthermore, the divided pipeline attribute assignment processing unit 24B sets the calculated pipeline length of divided pipeline P11 as an attribute value of the divided pipeline, and registers the environmental attribute of the polygon D on which divided pipeline P11 is laid as an attribute value of divided pipeline P11. The same process is performed for each divided pipeline P12, P13, P21, and P22. The middle section of Figure 3 shows the relationship between each divided pipeline, its length, and the laid polygons.

[0043] The divided pipeline analysis processing unit 25 performs deterioration analysis or hydraulic analysis on the divided pipelines. The deterioration analysis is explained below. The divided pipeline analysis processing unit 25 calculates the leakage accident rate (incidents / km / year) as the deterioration of the pipeline based on the following estimation formula, thereby identifying pipelines with high leakage accident rates as pipelines with high deterioration that should be prioritized for replacement. Leakage accident rate (incidents / km / year) Wr = R1・R2・R3・F(T) where F(T): Standard accident rate curve for each pipe type F(T) = a・T ｂ, R1: Correction factor related to pipe specifications, R2: Correction factor based on pipe diameter, R3: Embedded ground correction factor, a, b: Coefficients for each type of pipe representing the degree of increase in the leakage accident rate over time. The above estimation formula is the leakage accident rate estimation formula for embedded pipes provided by the Water Technology Research Center, a public interest incorporated foundation. Note that the leakage accident rate estimation formula is not particularly limited, and other estimation formulas can also be used.

[0044] An explanation of the hydraulic analysis will be given. The divided pipeline analysis processing unit 25 calculates the flow direction of the water flowing through each pipeline, the flow velocity, the water pressure at each intersection, and further, the residual chlorine concentration, etc. by hydraulic analysis. For example, when calculating the water head at each node (synonymous with the intersection) by hydraulic analysis using the node head method, the Hazen-Williams formula H = 10.666 × (L × Q １．８５ ) / (C １．８５ × d ４．８７ ) and the flow rate equation, which is the continuity condition equation of the flow rate at the node illustrated in FIG. 5A, Σ(±Q ｉｊ ) = P ｉ and the closed pipeline equation Σ(±H ｋｓ ) - δE ｋ = 0 are obtained as the simultaneous solutions.

[0045] Here, H is the frictional head loss of the pipe (m), L is the pipe length (m), Q is the flow rate (m ３ / s), d is the actual inner diameter of the pipe (m), C is the flow velocity coefficient, Q [[ID=2S]] ｉ is the flow rate of each pipeline connected to the node of interest, P ｉ is the water supply amount from the node. Also, the closed pipeline equation means that the water in the pipeline network flows so that the total energy loss is minimized. That is, in a pipeline network with J pipelines, ΣQ ｊ H ｊ , j = 1 to J is minimized. By solving the flow rate equation with the constraint condition ΣQ ｊ H ｊ → min, the closed pipeline equation is obtained.

[0046] The value of the flow velocity coefficient C is constant even when the time and water volume change, and it varies depending on the roughness of the inner wall of the pipe. For example, in the case of cast iron pipes, it is 130 - 140 for newly laid pipes according to the laying year, and it decreases to 60 - 70 for old pipes with rust nodules on the inner wall due to the old laying year.

[0047] The system reads necessary information such as pipe length, pipe diameter, and height of each node including the reservoir from the map information storage unit 30 and the pipeline attribute data storage unit 31. After setting the amount of water flowing into the inflow intersection and the amount of water taken out from the water demand point (outlet intersection), the system solves by substituting these values ​​into the above-mentioned formula to obtain a simultaneous solution. This determines the flow direction through each pipeline, and identifies the pipeline 8 necessary for distributing water from the reservoir 7 towards the node (water demand point 9B).

[0048] The residual chlorine concentration is determined as follows: The time t for water to reach two points in a water distribution block (a pipeline network divided into blocks under predetermined conditions) is calculated using hydraulic analysis. Based on the calculated time t and the measured residual chlorine value, the k value (residual chlorine concentration reduction rate coefficient) for each water distribution block is calculated using the following formula, which expands the first-order reaction equation for residual chlorine concentration for k. Furthermore, the calculated k value is set for all pipelines within the water distribution block, and the hydraulic analysis is performed again. The first-order reaction equation for residual chlorine concentration is then applied to calculate the estimated residual chlorine concentration at each point. k = (logCl ０ -logCl) / t where, Cl ０ : Initial residual chlorine concentration (mg / L), Cl: Residual chlorine concentration at a given node (mg / L). The first-order reaction equation for residual chlorine concentration is as follows: Cl = Cl ０ The exp(-kt) divided pipeline analysis processing unit 25 generates pipeline information that should be updated to ensure a stable water supply, based on the analysis results and water demand forecast described above.

[0049] The pipeline coupling processing unit 24C reconnects adjacent divided pipelines based on the analysis results from the divided pipeline analysis processing unit 25. Even if the divided pipelines are specifically divided to belong to individual polygons, if the analysis results for each adjacent divided pipeline fall within a predetermined acceptable range, the significance of dividing the pipeline decreases, and it may even hinder the pipeline renewal plan. For example, adjacent divided pipelines are reconnected when the leakage accident rate (incidents / km / year) is almost the same between adjacent divided pipelines.

[0050] The lower part of Figure 3 shows an example where the divided pipelines P21 and P22 shown in the middle part are recombined to form a single divided pipeline P2, and the buried environment attribute is set to the environment attribute of polygon D. From the viewpoint of ensuring safety, it is preferable that the buried environment attribute of the recombined pipe be set to the environment attribute of the polygon with the higher analysis value compared to the divided pipeline before recombination. However, depending on the purpose, it may also be set to the environment attribute of the polygon with the lower analysis value.

[0051] For the pipeline network thus divided, the renewal plan creation processing unit 26 creates a renewal plan. The renewal plan creation processing unit 26 assigns priorities based on factors such as the number of years elapsed since each pipeline was laid and the number of pipelines with a high leakage accident rate (incidents / km / year) obtained from the deterioration analysis. It then creates a renewal plan that designates pipelines in areas where high-priority pipelines are concentrated and the total pipeline length is within a predetermined value as the highest priority pipelines for renewal.

[0052] As a result, even long pipelines laid across multiple buried environment polygons can be divided into appropriate lengths and pipelines with appropriate buried environment attributes, making it possible to create an appropriate renewal plan.

[0053] The pipeline renewal plan creation method performed by the pipeline renewal plan creation device described above will be explained below based on the flowchart shown in Figure 4. The pipeline renewal plan creation method is performed by the data acquisition unit 21 and is a pipeline renewal plan creation method that creates a pipeline renewal plan according to the calculation processing by the processor. A data acquisition step (SA1) is performed to acquire pipeline data including the buried location of each pipeline constituting the pipeline network, and polygon data in which the geological and / or ground in which the pipeline is buried is demarcated as the buried environment, from the map information stored in the storage unit 3. A drawing step (SA2) is performed by the drawing processing unit 22, in which a pipeline diagram is drawn on the pipeline diagram layer based on the pipeline data, and a buried environment polygon is drawn on the polygon layer based on the polygon data.

[0054] Next, the intersection extraction processing unit 23 executes an intersection extraction step, which extracts the intersections between the individual pipelines constituting the pipeline diagram and the buried environment polygons by superimposing the two layers drawn in the drawing step. The divided pipeline creation processing unit 24 executes the following steps: if there are no intersections (SA3, N), the buried environment attribute, indicated by the polygon in which the pipeline is buried, is assigned to the pipeline (SA7); if there are intersections (SA3, Y), a pipeline division process is executed to divide the pipeline at the intersection (SA4), and the pipeline length of the divided pipeline is calculated (SA5). Furthermore, the buried environment attribute, indicated by the polygon in which the divided pipeline is buried, is assigned to the divided pipeline (SA6). The processes from steps SA4 to SA6 are repeated for all intersections extracted in step SA3.

[0055] Furthermore, the divided pipeline analysis processing unit 25 executes a divided pipeline analysis step, in which deterioration analysis or hydraulic analysis is performed on the divided pipeline (SA9). The pipeline coupling processing unit 24C executes an evaluation of adjacent divided pipelines based on the evaluation values ​​obtained from the analysis of the divided pipeline (SA10). If the evaluation values ​​are within an acceptable range (SA10, ≈), a pipeline coupling processing step is executed in which the adjacent pipelines are coupled (SA11). If the evaluation values ​​are not within an acceptable range (SA10, ≠), the divided state is maintained. Furthermore, the renewal plan creation processing unit 26 executes a pipeline renewal plan based on the analysis results of the divided pipeline (SA12). The job management unit 20 executes a process in which polygon attributes, such as the divided pipeline, pipeline length, and buried environment, are stored in the map information storage unit 30 and the pipeline attribute data storage unit 31, and the created pipeline renewal plan is stored in the renewal plan data storage unit 34 (SA13). The above series of steps are managed by the job management unit 20.

[0056] The pipeline replacement plan creation program according to the present invention is a pipeline replacement plan creation program that causes a processor to execute each step of the pipeline replacement plan creation method described above, and is pre-recorded on a non-volatile recording medium, installed on a computer, and executed by the CPU.

[0057] Polygon data that demarcates the geological and / or ground conditions in which the pipeline is buried as the buried environment may be polygon data laid out planarly on the ground surface, or polygon data at the depth in which the pipeline is buried. In the latter case, a more accurate buried environment can be obtained. If the same geological and / or ground mass extending from the ground surface to the ground is defined by a 3D polygon that represents it three-dimensionally, it becomes possible to obtain an accurate buried environment even for pipelines buried in an inclined position underground, thereby enabling appropriate pipeline division. In this case, by providing multiple pipeline diagram layers in the depth direction and multiple polygon layers in the depth direction, and drawing pipeline diagrams and polygons on each layer, it becomes possible to extract the intersections between the pipeline and polygon boundaries contained in layers of the same depth, making it easy to divide the pipeline in three dimensions.

[0058] The embodiments described above represent one aspect of the present invention, and the technical scope of the present invention is not limited based on this description. Furthermore, it goes without saying that the specific configuration of each part can be appropriately modified and designed within the scope that the effects of the present invention are achieved.

[0059] 1: Pipeline renewal plan creation device 2: Calculation processing unit 3: Memory unit 20: Job management unit 21: Data acquisition unit 22: Drawing processing unit 23: Intersection extraction processing unit 24: Divided pipe creation processing unit 25: Divided pipe analysis processing unit 26: Renewal plan creation processing unit

Claims

1. A pipeline renewal plan creation device that creates renewal plans for each pipeline constituting a pipeline network according to calculation processing by a processor, comprising: a data acquisition unit that acquires pipeline data including the buried location of each pipeline constituting the pipeline network, and polygon data in which the geology and / or ground in which the pipeline is buried is demarcated as the buried environment from map information stored in a memory unit; a drawing processing unit that draws a pipeline diagram on a pipeline diagram layer based on the pipeline data and draws buried environment polygons on a polygon layer based on the polygon data; an intersection extraction processing unit that extracts intersections between individual pipelines constituting the pipeline diagram and the buried environment polygons by superimposing the two layers drawn by the drawing processing unit; a divided pipeline creation processing unit that creates divided pipelines by dividing the pipeline based on the intersections; a divided pipeline analysis processing unit that performs deterioration analysis or hydraulic analysis on the divided pipelines; and a renewal plan creation processing unit that creates a pipeline renewal plan based on the analysis results for the divided pipelines.

2. The pipeline renewal plan creation device according to claim 1, wherein the pipeline data and polygon data include coordinate information managed by a geographic information system (GIS), and the divided pipeline creation processing unit includes a divided pipeline length calculation processing unit that calculates the pipeline length of the divided pipeline based on the coordinate information.

3. The pipeline renewal plan creation apparatus according to claim 1, wherein the divided pipeline creation processing unit includes a divided pipeline attribute data assignment processing unit that assigns the environmental attributes of the buried environment polygon to the divided pipeline belonging to the buried environment polygon.

4. The pipeline renewal plan creation device according to claim 1, further comprising a pipeline coupling processing unit that compares the analysis results of adjacent divided pipelines and, if the difference is within an acceptable range, combines each of the divided pipelines into a single pipeline.

5. A method for creating a pipeline renewal plan for each pipeline constituting a pipeline network, according to calculations performed by a processor, comprising: a data acquisition step of acquiring pipeline data including the buried location of each pipeline constituting the pipeline network, and polygon data in which the geology and / or ground in which the pipeline is buried is demarcated as the buried environment, from map information stored in a memory unit; a drawing step of drawing a pipeline diagram on a pipeline diagram layer based on the pipeline data and drawing buried environment polygons on a polygon layer based on the polygon data; an intersection extraction step of extracting intersections between individual pipelines constituting the pipeline diagram and the buried environment polygons by superimposing the two layers drawn in the drawing step; a divided pipeline creation step of creating divided pipelines by dividing the pipeline based on the intersections; a divided pipeline analysis step of performing deterioration analysis or hydraulic analysis on the divided pipelines; and a renewal plan creation step of creating a pipeline renewal plan based on the analysis results for the divided pipelines.

6. The pipeline renewal plan creation method according to claim 5, wherein the pipeline data and polygon data include coordinate information managed by a geographic information system (GIS), and the divided pipeline creation step includes a divided pipeline length calculation step that calculates the pipeline length of the divided pipeline based on the coordinate information.

7. The pipeline renewal plan creation method according to claim 5, wherein the divided pipeline creation step includes a divided pipeline attribute data assignment step of assigning the environmental attributes of the buried environment polygon to the divided pipeline belonging to the buried environment polygon.

8. The pipeline renewal plan creation method according to claim 5, further comprising a pipeline coupling processing step of comparing the analysis results of adjacent divided pipelines among the divided pipelines and, if the difference is within an acceptable range, coupling the divided pipelines into a single pipeline.

9. A pipeline renewal plan creation program that causes a processor to execute each step of the pipeline renewal plan creation method described in any one of claims 5 to 8.

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