Infrastructure joint renewal plan planning support system, infrastructure joint renewal plan planning support method, infrastructure joint renewal plan planning support device, and infrastructure joint renewal plan planning support program

Abstract

To provide an infrastructure joint renewal planning support system capable of supporting planning of an optimal joint renewal plan of infrastructure pipelines that optimize life cycle costs considering the cost reduction effect of the joint construction between different infrastructure construction contractors, an infrastructure joint renewal planning support method, and an infrastructure joint renewal planning support device and infrastructure joint renewal planning support program.SOLUTION: A joint renewal planning support system includes: a joint renewal planning unit that includes an information processing device for planning an infrastructure joint renewal plan; and a user unit that is connected to the joint renewal planning unit to communicate therewith, which is an information processing device managed by an infrastructure administrator. The information processing device of the joint renewal planning unit is configured to calculate an optimal update time including checking whether there is any joint renewal of infrastructure pipelines among multiple infrastructure construction contractors.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a system for supporting the formulation of joint infrastructure renewal plans, a method for supporting the formulation of joint infrastructure renewal plans, a device for supporting the formulation of joint infrastructure renewal plans, and a program for supporting the formulation of joint infrastructure renewal plans. [Background technology]

[0002] Businesses that manage infrastructure such as water pipes and gas pipes regularly replace parts of their pipelines through renewal work to prevent damage due to deterioration of infrastructure pipelines and disruptions to the supply of lifelines.

[0003] One example of a technology to support the planning of renewal plans for infrastructure pipelines is the technology described in Patent Document 1. Patent Document 1 describes a technology for generating information on projects to improve assets, such as renewal work that replaces multiple interconnected infrastructure pipelines and other assets, based on quantified failure risks. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] International Publication No. 2020 / 077005 [Overview of the project] [Problems that the invention aims to solve]

[0005] Infrastructure such as water pipes and gas pipes are currently in need of extensive replacement, making it necessary to develop cost-effective plans. One way to reduce the cost of replacement work is through joint construction, where multiple types of infrastructure are replaced simultaneously.

[0006] Patent Document 1 can generate project information on infrastructure pipelines that should be prioritized for renewal at the present time, based on the risk of failure. However, it does not provide the information necessary for formulating long-term renewal plans based on indicators that show long-term efficiency, such as the life cycle cost of infrastructure pipelines. Furthermore, it does not consider methods for reducing the cost of renewal work, such as joint construction.

[0007] This invention was made in view of the above background. Specifically, one of the objectives of this invention is to provide an infrastructure joint renewal plan planning support system, an infrastructure joint renewal plan planning support method, an infrastructure joint renewal plan planning support device, and an infrastructure joint renewal plan planning support program that can support the planning of an optimal joint renewal plan for infrastructure pipelines that optimizes life cycle costs by considering the cost reduction effect of joint construction among different infrastructure contractors. [Means for solving the problem]

[0008] To solve the above problems, the present invention provides an infrastructure joint renewal plan planning support system comprising: an infrastructure joint renewal plan planning support device including an information processing device that plans a joint renewal plan including the renewal timing of each of the multiple infrastructure pipelines whose renewal work is carried out by multiple infrastructure contractors, and whether or not the renewal work will be carried out jointly at the renewal timing of each of the infrastructure pipelines; and a user device, wherein the information processing device and the user device are configured to send and receive information from each other, and the information processing device includes road network information indicating a road network including multiple road sections, infrastructure pipeline network information indicating multiple infrastructure pipelines installed in each of the road sections, road infrastructure pipeline correspondence relationship information indicating the correspondence between the road sections and the infrastructure pipelines installed in the road sections, and each of the multiple infrastructure pipelines is indicated as either jointly constructible or not jointly constructible. Based on joint construction feasibility designation information indicating whether or not it is determined, the system divides the multiple road sections constituting the road network into multiple groups, each of which serves as a criterion for determining whether or not joint construction is carried out for the infrastructure pipelines targeted by each of the multiple infrastructure construction companies. The system calculates whether or not each of the multiple infrastructure pipelines will be renewed at each planned time within the planned period, which is the target of the joint renewal plan for the multiple infrastructure pipelines, and calculates the renewal time for each infrastructure pipeline and whether or not joint construction is carried out at each of the planned time for each infrastructure pipeline, based on the calculated renewal time for each infrastructure pipeline at each planned time.

[0009] The present invention provides an infrastructure joint renewal plan planning support method using an information processing device that plans a joint renewal plan including the renewal timing of each of the multiple infrastructure pipelines whose renewal work is carried out by multiple infrastructure contractors, and whether or not the renewal work will be carried out jointly at the renewal timing of each of the multiple infrastructure pipelines, wherein the information processing device plans the road network information indicating a road network including multiple road sections, infrastructure pipeline network information indicating multiple infrastructure pipelines installed in each of the road sections, road infrastructure pipeline correspondence relationship information indicating the correspondence between the road sections and the infrastructure pipelines installed in the road sections, and joint construction feasibility designation information indicating whether each of the multiple infrastructure pipelines is designated as jointly constructible or not, based on the road network The multiple road sections constituting the twork are divided into multiple groups, each of which serves as a criterion for determining whether or not to jointly construct the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The total lifecycle cost of the multiple infrastructure pipelines, including the total replacement introduction cost which varies depending on whether or not the replacement work for each infrastructure pipeline installed in the road sections belonging to each group is jointly constructed during the planned period covered by the joint replacement plan for the multiple infrastructure pipelines, is optimized by calculating whether or not each infrastructure pipeline is to be replaced at each planned time within the planned period. Based on the calculated replacement status of each infrastructure pipeline at each planned time, the replacement time for each infrastructure pipeline and whether or not to jointly construct the infrastructure pipeline at that time are calculated.

[0010] The present invention provides an infrastructure joint renewal plan planning support device that includes an information processing device for formulating a joint renewal plan that includes the renewal timing of each of the multiple infrastructure pipelines whose renewal work is carried out by multiple infrastructure contractors, and whether or not the renewal work will be carried out jointly at the renewal timing of each of the infrastructure pipelines, wherein the information processing device configures the road network based on road network information indicating a road network including multiple road sections, infrastructure pipeline network information indicating multiple infrastructure pipelines installed in each of the road sections, road infrastructure pipeline correspondence relationship information indicating the correspondence between the road sections and the infrastructure pipelines installed in the road sections, and joint construction feasibility designation information indicating whether each of the multiple infrastructure pipelines is designated as capable of joint construction or not. The system is configured to divide the multiple road sections into multiple groups, each of which serves as a criterion for determining whether or not to jointly construct the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The system calculates whether or not each of the multiple infrastructure pipelines will be updated at each planned time within the planned period, which is the target of the joint renewal plan for the multiple infrastructure pipelines, and calculates the update timing for each infrastructure pipeline and whether or not to jointly construct the infrastructure pipelines at each planned time based on the calculated update timing for each infrastructure pipeline.

[0011] The infrastructure co-update plan formulation support program of the present invention causes a computer to execute a process of formulating a co-update plan including the update timing of each of a plurality of infrastructure pipelines to be updated by a plurality of infrastructure construction contractors and the presence or absence of joint construction of the update work at the update timing of each of the infrastructure pipelines. The infrastructure co-update plan formulation support program causes the computer to execute a process based on road network information indicating a road network including a plurality of road sections, infrastructure pipeline network information indicating a plurality of the infrastructure pipelines installed in each of the road sections, road-infrastructure pipeline correspondence information indicating a correspondence relationship between the road sections and the infrastructure pipelines installed in the road sections, and co-construction availability designation information indicating whether each of the plurality of infrastructure pipelines is designated as either co-constructible or non-co-constructible. The program divides the plurality of road sections constituting the road network into a plurality of groups in a unit that serves as a criterion for determining the presence or absence of joint construction of the infrastructure pipelines to be constructed by each of the plurality of infrastructure construction contractors, and calculates the total life cycle cost of the plurality of infrastructure pipelines including the total update introduction cost that changes depending on whether the update work is jointly constructed when updating each of the infrastructure pipelines installed in the road sections belonging to each group during the planned target period of the co-update plan for the plurality of infrastructure pipelines. Based on the calculated presence or absence of updates for each of the infrastructure pipelines at each planned target time during the planned target period of each of the infrastructure pipelines, the program calculates the update timing of each of the infrastructure pipelines and the presence or absence of joint construction at the update timing of each of the infrastructure pipelines.

Effect of the Invention

[0012] According to the present invention, it is possible to support the formulation of an optimal co-update plan that optimizes the life cycle cost of infrastructure pipelines in consideration of the cost reduction effect by joint construction between different infrastructure construction contractors.

Brief Description of the Drawings

[0013] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a joint update plan creation support system. [Figure 2] FIG. 2 is a diagram showing an example of the hardware constituting the joint update plan device and the user device. [Figure 3] FIG. 3 is a diagram showing the functions of the joint update plan device. [Figure 4A] FIG. 4A is a diagram showing an example of the data configuration of road network data in the joint update plan creation support system. [Figure 4B] FIG. 4B is a diagram showing an example of the data configuration of infrastructure pipeline network data in the joint update plan creation support system. [Figure 5] FIG. 5 is a diagram showing an example of the processing of the network association unit. [Figure 6] FIG. 6 is a flowchart showing an example of the processing of the optimal update timing calculation unit. [Figure 7] FIG. 7 is a diagram showing an example of the processing of the road grouping unit. [Figure 8] FIG. 8 is a diagram for explaining the calculation formula of the decision variable and the pipeline update introduction cost in the optimal update timing calculation unit. [Figure 9] FIG. 9 is a diagram showing the objective function and an example thereof in the optimal update timing calculation unit. [Figure 10] FIG. 10 is a sequence diagram showing the joint update plan presentation process of the joint update plan creation support system. [Figure 11] FIG. 11 is a diagram showing an example of the execution screen of the pipeline designation and network association process where joint construction is not possible in the user device. [Figure 12] FIG. 12 is a diagram showing an example of the execution screen of the optimal update timing calculation process in the joint update plan device. [Figure 13] FIG. 13 is a diagram showing an example of the display screen of the optimal update timing calculation result in the user device. [Figure 14] FIG. 14 is a diagram showing an example of the detailed display screen of the optimal update timing calculation result in the user device. [Figure 15]Figure 15 is a flowchart showing an example of the processing in the optimal update timing calculation unit. [Modes for carrying out the invention]

[0014] The embodiments will be described below with reference to the drawings as appropriate. In the following description, common components will be denoted by common reference numerals, and redundant explanations will be omitted. In the following description, various types of information may be described using expressions such as "table," but these types of information may also be represented by other data structures. Furthermore, when describing identification information, expressions such as "ID" and "identification information" will be used, but these are interchangeable. Furthermore, in the following description, processing may be described with a functional block as the subject, but the subject of the processing may be the processor or device instead of the functional block.

[0015] <<First Embodiment>> Figure 1 shows a schematic configuration of the joint renewal plan planning support system 101 according to the first embodiment of the present invention. The joint renewal plan planning support system 101 includes a joint renewal planning device 102 that plans renewal plans including simultaneous renewal by joint construction by multiple infrastructure contractors (stakeholders) of infrastructure (water and sewage pipes, gas pipes, communication lines, power lines, etc.) buried in roads, and two or more user devices 104 that are communicably connected to the joint renewal planning device 102 via a communication network 103.

[0016] The communication network 103 is a wireless or wired communication method, such as the Internet, a mobile phone network, a LAN (Local Area Network), a WAN (Wide Area Network), or a dedicated line.

[0017] The joint infrastructure renewal planning device 102 is an information processing device (computer) managed by the administrator of the road where the infrastructure is buried (national government, local government, etc.) or a third party that supports the formulation of a joint infrastructure renewal plan. Examples include personal computers, server devices, mainframes, etc. For convenience, the joint infrastructure renewal planning device 102 may also be referred to as a "joint infrastructure renewal planning support device."

[0018] The joint renewal planning device 102 receives designations from the user device 104 for pipelines that cannot be jointly constructed, processes the infrastructure pipeline network to match the road network, and formulates the optimal joint renewal plan in terms of LCC (Life Cycle Cost).

[0019] User device 104 is an information processing device used by the user, who is the infrastructure administrator, and is, for example, a personal computer, smartphone, or tablet. User device 104 receives input from the user regarding the designation of pipelines that cannot be jointly constructed and transmits this to the joint renewal planning device 102. After the joint renewal planning device 102 has formulated a joint renewal plan, user device 104 receives this information and presents it to the user.

[0020] Figure 2 shows an example of the hardware (hereinafter referred to as the information processing device 201) that constitutes the joint update planning device 102 and the user device 104. The information processing device 201 comprises a processor 202, main memory 203, auxiliary memory 204, input device 205, output device 206, and communication device 207. Each part of the information processing device 201 is connected to each other so as to be able to communicate via communication means such as a bus (BUS) (not shown). Note that the information processing device 201 may be implemented in whole or in part by virtual resources such as a cloud server.

[0021] The processor 202 is composed of a CPU (Central Processing Unit), an MPU (Micro Processing Unit), a GPU (Graphics Processing Unit), and the like. The processor 202 reads and executes programs stored in the main memory 203, thereby realizing the functions of the joint update planning device 102 and the user device 104.

[0022] The main memory 203 is a device for storing programs and data, and can be ROM (Read Only Memory), RAM (Random Access Memory), NVRAM (Non-Volatile RAM), etc.

[0023] The auxiliary storage device 204 includes, for example, an SSD (Solid State Drive), NVRAM such as an SD memory card, optical storage devices such as a CD (Compact Disc) or DVD (Digital Versatile Disc), an HDD (Hard Disc Drive), or the storage area of ​​a cloud server. Programs and data stored in the auxiliary storage device 204 are read into the main memory device 203 as needed.

[0024] The input device 205 is an interface that accepts information input, such as a keyboard, mouse, touch panel, card reader, or microphone. Alternatively, the information processing device 201 may be configured to accept information input from other devices via the communication device 207.

[0025] The output device 206 is an interface for outputting various types of information, such as a screen display device like a liquid crystal monitor, LCD (Liquid Crystal Display), or graphics card, a printing device, or an audio output device like a speaker. Alternatively, the information processing device 201 may be configured to output information to and from other devices via the communication device 207.

[0026] The communication device 207 is a wired or wireless communication interface that enables communication with other devices via the communication network 103, and is, for example, a NIC (Network Interface Card), a wireless communication module, a USB (Universal Serial Interface) module, a serial communication module, etc.

[0027] Figure 3 shows the functions of the joint update planning device 102. The joint update planning device 102 includes the functions of a storage unit 301 and a calculation processing unit 302.

[0028] The memory unit 301 stores road network data 303, infrastructure pipeline network data 304 for each infrastructure contractor (stakeholder), network mapping results 305, mobilization cost data 306, joint construction cost reduction data 307 for each infrastructure contractor, and renewal plan calculation results 308.

[0029] The calculation processing unit 302 includes a network mapping unit 309 that performs mapping processing between road network data 303 and infrastructure pipeline network data 304, and an optimal update timing calculation unit 310 that calculates the optimal update timing, including whether or not there is joint update among infrastructure construction companies.

[0030] The optimal renewal timing calculation unit 310 includes a road grouping unit 311 that calculates the grouping of the road network, and a life cycle cost calculation unit 312 that calculates the LCC based on the renewal timing of all infrastructure pipelines. The life cycle cost calculation unit 312 includes a renewal introduction cost calculation unit 313 that calculates the introduction cost at the time of infrastructure renewal based on mobilization cost data 306 and reduction cost data 307 due to joint construction for each infrastructure contractor, and a running cost calculation unit 314 that calculates the running cost of the infrastructure. The renewal plan calculated by the optimal renewal timing calculation unit 310 is stored in the storage unit 301 as the renewal plan calculation result 308. The renewal plan calculation result 308 is transmitted to the user device 104 via the communication network 102 in Figure 1. The user device 104 presents the received renewal plan calculation result 308 to the user via the output device 206 in Figure 2.

[0031] Figures 4A and 4B show examples of the data structure for road network data 303 and infrastructure pipeline network data 304 in the joint renewal plan planning support system.

[0032] In this first embodiment, as shown in Figure 4A, the road network 401 is assumed to consist of roads 402 and intersections 403 which are connection points between roads. The road network data 303 includes information for each road, such as road ID, starting point ID, ending point ID, starting point latitude, starting point longitude, ending point latitude, and ending point longitude. Specifically, the road network data 303 includes road ID 303a, starting point ID 303b, ending point ID 303c, starting point latitude 303d, starting point longitude 303e, ending point latitude 303f, and ending point longitude 303g as columns for storing information (values). In the road network data 303, the information corresponding to each column related to the road network 401 is associated with each other and stored as row-level information (records). Road ID 303a stores identification information (road ID) for identifying road 402 (road section) in the road network 401. The starting point ID 303b stores identification information (starting point ID) for identifying the starting point of a road (road section). The ending point ID 303c stores identification information (ending point ID) for identifying the ending point of a road (road section). The starting point latitude 303d stores the latitude for identifying the location of the starting point of the road. The starting point longitude 303e stores the longitude for identifying the location of the starting point of the road. The ending point latitude 303f stores the latitude for identifying the location of the ending point of the road. The ending point longitude 303g stores the longitude for identifying the location of the ending point of the road. Note that the road network data 303 may also be referred to as "road network information" for convenience.

[0033] In this first embodiment, as shown in Figure 4B, the infrastructure pipeline network 404 is assumed to consist of pipelines 405 and connection points 406 between pipelines. The infrastructure pipeline network data 304 includes information for each pipeline (infrastructure pipeline), such as pipeline ID, start point ID, end point ID, start point latitude, start point longitude, end point latitude, end point longitude, length, and year of installation. Specifically, the infrastructure pipeline network data 304 includes pipeline ID 304a, start point ID 304b, end point ID 304c, start point latitude 304d, start point longitude 304e, end point latitude 304f, end point longitude 304g, length 304h, and year of installation 304i as columns for storing information (values). In the infrastructure pipeline network data 304, the information corresponding to each column related to the infrastructure network is associated with each other and stored as row-level information (records). The pipeline ID 304a stores identification information (infrastructure pipeline ID) for identifying the infrastructure pipeline. The starting point ID 304b stores identification information (starting point ID) for identifying the starting point of the infrastructure pipeline. The ending point ID 304c stores identification information (ending point ID) for identifying the ending point of the infrastructure pipeline. The starting point latitude 304d stores the latitude for identifying the location of the starting point of the infrastructure pipeline. The starting point longitude 304e stores the longitude for identifying the location of the starting point of the infrastructure pipeline. The ending point latitude 304f stores the latitude for identifying the location of the ending point of the infrastructure pipeline. The ending point longitude 304g stores the longitude for identifying the location of the ending point of the infrastructure pipeline. The length 304h stores the length of the infrastructure pipeline. The installation year 304i stores the installation year of the infrastructure pipeline. Note that the infrastructure network data 304 may also be referred to as "infrastructure pipeline network information" for convenience.

[0034] Figure 5 shows an example of the processing performed by the network mapping unit 309. In this figure, water pipes and gas pipes are used as examples of infrastructure (infrastructure pipelines). Note that the infrastructure construction company that performs the renewal (renewal work) of water pipes and the infrastructure construction company that performs the renewal of gas pipes are different. For example, for each pipeline included in the water pipeline network 502, the network mapping unit 309 performs the process of recording in the water pipeline-road mapping table 504 the road that corresponds to the pipeline, where the sum of the shortest distances from each of the two endpoints of the pipeline to each of the two endpoints of the road included in the road network 501 is minimized. The water pipeline-road mapping table 504 includes water pipeline ID 504a and road ID 504b as columns for storing information (values). In the water pipeline-road mapping table 504, the IDs of the corresponding water pipelines and the IDs of the road sections are associated with each other and stored (recorded, remembered) as row-level information (records).

[0035] The same process described above is performed for the gas pipeline network 503, and the roads corresponding to each gas pipeline are recorded in the gas pipeline-road correspondence table 505. The gas pipeline-road correspondence table 505 includes gas pipeline ID 505a and road ID 505b as columns for storing information (values). In the gas pipeline-road correspondence table 505, the IDs of the corresponding gas pipelines and the IDs of the roads are associated with each other and stored (recorded, remembered) as row-level information (records).

[0036] Based on the above, the water pipeline-road correspondence table 504 and gas pipeline-road correspondence table 505 are used to associate water pipelines indicated by water pipeline IDs and gas pipelines indicated by gas pipeline IDs corresponding to the same road ID, indicating that they are buried under the same road. The result of this association is stored as the network correspondence result 305. If there are pipelines 506 that the user has designated as not eligible for joint construction, they are distinguished by processing such as adding 1000 to the value of the water pipeline ID, as shown in the figure. Pipelines 506 that the user has not designated as not eligible for joint construction are designated as eligible for joint construction. Note that the water pipeline-road correspondence table 504 (gas pipeline-road correspondence table 505) may also be referred to as "road infrastructure pipeline correspondence information" for convenience. The value of the water pipeline ID (gas pipeline ID) indicates whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, so for convenience, it may also be referred to as "eligibility designation information for joint construction". The joint construction feasibility designation information may also be information that associates information indicating whether or not joint construction is designated with the water pipeline ID (gas ID). Furthermore, the processing of the network mapping unit 309 shown here is just one example, and network mapping may be performed using a different method. Additionally, the infrastructure managed by three or more infrastructure contractors may be mapped to the road network 401.

[0037] Figure 6 is a flowchart showing an example of the processing of the optimal renewal timing calculation unit 310. The optimal renewal timing calculation unit 310 performs an optimal renewal timing calculation process that determines the combination of road grouping patterns and all infrastructure renewal timings that minimizes the total LCC of the infrastructure. In the same figure, a flowchart of the processing using a heuristic solution method is shown as an example of the optimal renewal timing calculation process. Note that the solution method in the optimal renewal timing calculation shown here is not necessarily limited to the embodiment of the optimal renewal timing calculation unit 310. For example, a general solver capable of performing combinatorial optimization calculations with road grouping patterns and all infrastructure renewal timing combinations as variables may be used.

[0038] The following describes the optimal update timing calculation process performed by the joint update planning device 102, following the same figure. This optimal update timing calculation process is performed, for example, by the processor 202 of the information processing device that constitutes the joint update planning device 102. The processor 202 starts processing from step 600 and proceeds to step 601. In step 601, the processor 202 uses the road grouping unit 311 to group the roads included in the road network 401 into multiple groups and selects one road grouping pattern. The processing of the road grouping unit 311 will be explained in detail using Figure 7.

[0039] In step 602, the processor 202 selects one pattern for all infrastructure renewal timings. The selection method can be, for example, random selection or a greedy selection method. In step 603, the processor 202 uses the life cycle cost calculation unit 312 to calculate the LCC based on all infrastructure renewal timings selected in step 602. The processing of the life cycle cost calculation unit will be explained in detail using Figures 8 and 9.

[0040] In step 604, processor 202 determines whether the LCC calculated in step 603 is the smallest LCC to date. If it is the smallest, processor 202 determines "Yes" in step 604 and proceeds to step 605, where it updates the smallest LCC, updates the optimal update timing X in step 606, and updates the optimal road grouping in step 607. If it is not the smallest, processor 202 determines "No" in step 604 and proceeds directly to step 608. In this case, steps 605-607 are not performed. In step 608, processor 202 determines whether N2 patterns (multiple patterns) of infrastructure update timing have been tried. N2 is a predetermined positive integer appropriate for the determination. If there are fewer than N2 patterns, processor 202 determines "No" in step 608 and returns to step 602, performing the appropriate processing from steps 603-607 for different infrastructure update timing patterns.

[0041] When N2 patterns (multiple patterns) of infrastructure update timing are tested, processor 202 determines "Yes" in step 608 and proceeds to step 609.

[0042] In step 609, processor 202 determines whether it has tried N1 patterns (multiple patterns) of road grouping. N1 is a predetermined positive integer appropriate for the determination. If there are fewer than N1 patterns, processor 202 determines "No" in step 609 and returns to step 601, where it processes steps 602-608 for different road grouping patterns. If it has tried N1 patterns of road grouping, processor 202 determines "Yes" and proceeds to step 610, ending this flow for the time being.

[0043] Through the above process, the road grouping pattern that calculates the minimum LCC, the optimal renewal timing for all infrastructure, and the minimum LCC at that time are calculated. The calculation results are stored as renewal plan calculation result 308.

[0044] Figure 7 shows an example of the processing performed by the road grouping unit 311 included in the optimal update timing calculation unit 310. The road grouping unit 311 processes each road into a road group, which is a set of adjacent roads (road sections) within a range where joint construction is possible. In this figure, grouping using network Voronoi is shown as an example. In network Voronoi, multiple representative nodes 702 are selected from the road network 701, and points other than the representative nodes shown as white circles in the figure are grouped with the representative node that has the smallest distance on the network, creating road group A703, road group B704, and road group C705. With network Voronoi, different grouping results can be obtained by changing the selection of representative nodes 702. As a result, in step 601 of Figure 6, one different road grouping pattern is selected each time. Note that the processing of the road grouping unit 311 shown here is just one example, and road grouping may be performed using different methods.

[0045] FIG. 8 shows the decision variables in the optimal update timing calculation unit 310 and the calculation formula for the pipeline update introduction cost in the update introduction cost calculation unit 313 included in the optimal update timing calculation unit 310. Equation 803 is a binary variable that represents "1" when updating the pipeline of infrastructure k associated with road group i in year t, and "0" otherwise. Equation 802 is a vector obtained by arranging the binary variables of Equation 803 for all infrastructures K. Equation 801 is a matrix that has the vector of Equation 802 for each element and is arranged for all road groups I and all years T. The matrix shown by this Equation 801 is the decision variable of the optimization calculation calculated by the optimal update timing calculation unit 310. In the same year, if it is determined that the pipelines of infrastructures of different infrastructure construction contractors in the same road group are to be updated, these pipelines will be updated by joint construction as long as their infrastructure pipelines are not designated as non-joint construction. As a result of this optimization calculation, it is determined, including the presence or absence of joint construction, in which year all infrastructure pipelines will be updated. Note that the time unit in this optimization calculation does not have to be years. For example, it may be a problem of determining the update timing in monthly units with the time unit being months.

[0046] Equation 804 is the calculation formula for the total update introduction cost of all pipelines in the update introduction cost calculation unit 313. The total update introduction cost is calculated by adding up the update introduction costs for road group i in year t for all road groups and all years. The update introduction cost for road group i in year t is, as shown in Equations 805 to 807, the sum of the update introduction costs for the types of infrastructure K where x itk = 1 and the infrastructure is designated as joint construction possible it 1 and the update introduction costs for the types of infrastructure K where x itk = 1 and the infrastructure is designated as non-joint construction possible it 2 are calculated. Equations 808 and 809 are the calculation formulas for the update introduction costs for the types of infrastructure Kit where x itk = 1 and the infrastructure is designated as joint construction possible 1 In Equation 808, M is the mobilization cost (the cost for site establishment etc. during the pipeline update work), Cr kp is the replacement cost per unit length (the cost of the newly laid pipeline itself and the construction costs), k This refers to the cost reduction per unit length due to joint construction (costs reduced by jointly carrying out surveys, excavations, paving, etc., among multiple infrastructure construction companies (stakeholders)), l k The length of the infrastructure k conduit, T k k represents the service life of infrastructure k. Equation 809 is K it 1 This is the formula for calculating the average service life of a type of infrastructure. The first term on the right-hand side of Equation 808 is the value obtained by dividing the mobilization cost by the average service life, and represents the mobilization cost per year for one instance. it 1 The effect of joint construction is represented by a form in which mobilization costs are incurred only once for the renewal of a type of infrastructure. The second term on the right side is calculated by subtracting the cost reduction due to joint construction from the renewal cost per unit length, multiplying this by the pipeline length, and dividing by the service life. it 1 This is a summation of the costs for each type of infrastructure. The effect of joint construction is shown by subtracting the cost savings from the renewal cost. Equation 810 is x itk =1 and infrastructure K designated as not suitable for joint construction. it 2 This is the formula for calculating the replacement and introduction costs for a species. The right-hand side is the sum of mobilization costs and replacement costs divided by the number of years of service, which is K. it 2 This is the sum of the costs for various types of infrastructure. For pipelines that cannot be jointly constructed, the mobilization costs are the same as the renewal costs, K it 2 This calculation applies to each type of infrastructure and does not subtract the cost savings achieved through joint construction. The above formula allows for the calculation of the replacement and introduction costs, taking into account the effects of joint construction.

[0047] Note that Cr k , p k ,l k and T kThis may be calculated based on road network data 303, infrastructure pipeline network data 304, mobilization cost data 306, and cost reduction data 307 due to joint construction, which are stored in the memory unit 301.

[0048] Figure 9 shows the objective function in the optimal renewal timing calculation unit 310 and an example thereof. Equation 901 is the formula for calculating the total life cycle cost of all infrastructure, which is the objective function. The life cycle cost consists of the renewal introduction cost explained using Figure 8 and the running cost C of the infrastructure pipeline. running It can be expressed as the sum of the running costs C. running The calculation method is not specified as long as the condition of monotonically increasing with respect to the update timing is met. Running cost C running This can be calculated, for example, by multiplying the repair and compensation costs in the event of an accident by the pipeline's accident rate.

[0049] In the figure, the replacement and installation cost 902, which does not consider the effects of joint construction, is calculated by dividing mobilization costs and replacement costs by the service life, and therefore decreases monotonically with respect to the replacement period. The replacement and installation costs reduced by joint construction also decrease monotonically, and the overall cost becomes smaller than the replacement and installation cost 902 due to the reduction. Running costs 904 increase monotonically with respect to the replacement period due to factors such as an increase in the accident rate. Therefore, the life cycle cost 905 has a minimum value and an optimal replacement period. This minimum value of the life cycle cost and the optimal replacement period can be determined, for example, by the solution method shown in Figure 6.

[0050] Figure 10 is a sequence diagram showing the joint renewal plan presentation process of the joint renewal plan planning support system 101. In step 1001, user device 1 (user device 104) receives input from the user specifying pipelines that cannot be jointly constructed. In step 1002, user device 1 sends the received pipeline specification that cannot be jointly constructed and an execution command for the road network and infrastructure pipeline network mapping process to the joint renewal planning device 102. In steps 1003 and 1004, user device 2 (user device 104) performs the same processing as in steps 1001 and 1002. The above processing is the same even if there are three or more user devices. In step 1005, the joint renewal planning device 102 performs the road network and infrastructure pipeline network mapping process. In step 1006, the joint renewal planning device 102 performs the optimal renewal timing calculation process and calculates the road grouping pattern that calculates the minimum LCC, the optimal renewal timing for all infrastructure, and the minimum LCC at that time. In step 1007, the joint renewal planning device 102 transmits the calculation results of the optimal renewal timing calculation process to user devices 1 and 2. In steps 1008 and 1009, the joint renewal planning calculation results screen is displayed on each user device.

[0051] The Joint Renewal Plan Planning Support System 101 presents a joint renewal plan calculation results screen that shows multiple users the most efficient timing for pipeline renewal and whether or not joint construction is necessary, from a life cycle cost perspective. Each user can use the joint renewal plan calculation results screen to understand the timing and location of pipeline renewal work to be carried out individually or jointly, and this supports the formulation of renewal plans and the ordering of construction work based on them. As a result, it is no longer necessary for each infrastructure manager and infrastructure contractor (stakeholder) to individually create renewal plans and coordinate their respective construction timings when joint construction is required, as was done in the past. This speeds up the overall system processing time required for joint renewal plan planning and avoids the inefficiencies from a life cycle cost perspective that occur when adjusting construction timings after individually creating renewal plans.

[0052] Figure 11 shows an example of the execution screen 1101 for specifying pipelines that cannot be jointly constructed and the network mapping process on the user device 104. The user inputs infrastructure pipeline network data using the infrastructure pipeline network data input button 1102. The entered infrastructure pipeline network data can be confirmed in the infrastructure pipeline network display area 1103. The user can check the pipeline information 1105 in the infrastructure pipeline network display area 1103 by hovering the pointer over the pipelines included in the infrastructure pipeline network 1104. While checking the pipeline information 1105, the user can add pipelines that cannot be jointly constructed to the list of pipelines that cannot be jointly constructed 1106 using the add pipeline for pipelines that cannot be jointly constructed button 1107. Subsequently, by pressing the network mapping execution button 1108, the infrastructure pipeline network data, the specification of pipelines that cannot be jointly constructed, and the execution command for the network mapping process are sent to the joint renewal planning device 102. The joint renewal planning device 102 then performs the network mapping process.

[0053] Figure 12 shows an example of the execution screen 1201 for the optimal renewal timing calculation process in the joint renewal planning device 102. The administrator of the joint renewal planning device 102 selects the infrastructure for which to calculate the renewal plan from among the infrastructure for which infrastructure conduit network data has been received from user devices using the infrastructure selection button 1202. The administrator of the joint renewal planning device 102 can add infrastructure for which to calculate the renewal plan using the infrastructure add button 1203. Subsequently, the administrator of the joint renewal planning device 102 executes the optimal renewal timing calculation process by pressing the execute button 1204. After that, the calculation results of the optimal renewal timing calculation process are sent to each user device.

[0054] Figure 13 shows an example of the display screen 1301 of the optimal replacement timing calculation results in the user device 104. The optimization result comparison column 1302 displays the LCC for A: when replacing in order of earliest installation year, B: when replacing at the optimal time for LCC without considering joint construction, and C: when replacing at the optimal time for LCC while considering joint construction. The joint replacement planning device 102 is equipped with a program for calculating the LCC for case A and the LCC for case B, and by executing this program, the LCC for case A and the LCC for case B can be calculated.

[0055] The user can understand the extent of cost savings achieved through joint construction by using the optimization results comparison column 1302. The annual investment amount comparison column 1303 displays the annual investment amount in graphs for three scenarios: A) updating in order of earliest installation year, B) updating at the optimal time for LCC without considering joint construction, and C) updating at the optimal time for LCC while considering joint construction. The user can understand how much investment is required each year by using the optimization results comparison column 1302.

[0056] Figure 14 shows an example of the detailed display screen 1401 of the optimal replacement timing calculation results in the user device 104. The user selects the replacement plan they want to display details of in the result selection field 1402, selects the infrastructure type they want to display in the infrastructure selection field 1403, and selects the year they want to display in the year selection field 1404. The LCC display field 1405 displays the total LCC for the optimal replacement timing calculation result selected in the result selection field 1402. The replacement location display field 1406 displays the pipelines that will not be replaced 1407, pipelines that will be replaced by individual construction 1408, and pipelines that will be replaced by joint construction 1409 in the year selected in the year selection field 1404, based on the replacement plan selected in the result selection field 1402, based on the infrastructure selected in the infrastructure selection field 1403. By hovering the pointer over the pipeline in the replacement location display field 1406, the user can check the calculated replacement introduction cost and pipeline attributes 1410. In this way, the user can understand the timing and location of pipeline replacement work to be carried out individually or jointly.

[0057] As described above, the joint renewal plan planning support system 101 of this first embodiment can calculate the optimal renewal timing for infrastructure, including whether or not to conduct joint renewal among multiple infrastructure contractors (stakeholders). This allows the user, who is the administrator of the infrastructure, to understand the timing and location of pipeline renewal work to be carried out individually or jointly, and to be supported in formulating a renewal plan and ordering construction work based on that plan.

[0058] <<Second Embodiment>> The joint renovation plan planning support system 101 according to the second embodiment of the present invention will now be described. The joint renovation plan planning support system 101 according to the second embodiment differs from the joint renovation plan planning support system 101 according to the first embodiment only in the following respects. The joint renovation plan planning support system 101 according to the second embodiment executes the processing flow shown in the flowchart of Figure 15, instead of the processing flow shown in the flowchart of Figure 6.

[0059] The following explanation will focus on these differences.

[0060] Figure 15 is a flowchart showing the processing flow executed by the joint renewal plan formulation support system 101 according to the second embodiment. This flowchart is the same as the flowchart in Figure 6, except that step 609 is omitted. Therefore, if "Yes" is determined in step 608, this processing flow is terminated. By executing the processing flow shown in this flowchart, the joint renewal plan formulation support system 101 can improve calculation speed by reducing the computational load by calculating the optimal renewal timing for only one road grouping pattern.

[0061] <<Variation>> Furthermore, the present invention is not limited to the embodiments described above, and various modifications are included. For example, the embodiments described above are explained in detail to make the present invention easier to understand, and are not necessarily limited to those having all the configurations described. Also, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace at least one of the configurations of other embodiments for a part of the configuration of an embodiment. In addition, some or all of the above configurations, functions, processing units, processing means, etc. may be implemented in hardware, for example, by designing them as integrated circuits. Also, the above configurations, functions, etc. may be implemented in software by having a processor interpret and execute a program that realizes each function. Information such as programs, tables, files that realize each function can be stored in memory, a recording device such as a hard disk or SSD (Solid State Drive), or a recording medium such as an IC card, SD card, or DVD. In addition, in each figure, control lines and information lines are shown that are considered necessary for explanation, and do not necessarily show all control lines and information lines in actual implementation. For example, it may be assumed that almost all configurations are actually interconnected. Furthermore, the arrangement of the various functional units, processing units, and storage units of the information processing device described above is merely an example. The arrangement of the various functional units, processing units, and storage units can be changed to the optimal arrangement for each information processing device from the perspective of hardware and software performance, processing efficiency, communication efficiency, etc.

[0062] Furthermore, the present invention can take the following configuration.

[0063] [1] An infrastructure joint renewal plan planning support device including an information processing device that formulates a joint renewal plan including the renewal timing of each of the multiple infrastructure pipelines whose renewal work is carried out by multiple infrastructure construction companies, and whether or not the renewal work will be carried out jointly at the renewal timing of each of the infrastructure pipelines, User equipment and Includes, An infrastructure joint renewal plan planning support system configured such that the information processing device and the user device can send and receive information from each other, The aforementioned information processing device is Road network information showing a road network including multiple road sections, Infrastructure pipeline network information indicating multiple infrastructure pipelines installed in each of the aforementioned road sections, Road infrastructure pipeline correspondence information showing the correspondence between the road section and the infrastructure pipeline installed in the road section, Information indicating whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, Based on, The road sections constituting the road network are divided into multiple groups, each of which serves as a criterion for determining whether or not there is joint construction of the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The calculation determines whether each infrastructure pipeline is to be renewed at each planned time within the planned period, such that the total lifecycle cost of the multiple infrastructure pipelines, including the total renewal introduction cost which varies depending on whether the renewal work for each infrastructure pipeline installed in the road section belonging to each group is carried out jointly during the planned period covered by the joint renewal plan for the multiple infrastructure pipelines, is optimized. Based on whether each of the aforementioned infrastructure pipelines has been renewed at each of the aforementioned planned time periods, the renewal period for each of the aforementioned infrastructure pipelines and whether or not joint construction is being carried out at each of the aforementioned renewal periods for each of the aforementioned infrastructure pipelines are calculated. It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0064] [2] In the infrastructure joint renewal planning support system described in [1], The aforementioned information processing device is The total life cycle cost is calculated by summing the renewal and introduction costs incurred when renewing infrastructure pipelines designated as jointly constructible and installed in the road sections belonging to one of the groups, the renewal and introduction costs incurred when renewing infrastructure pipelines designated as not jointly constructible and installed in the road sections belonging to one of the groups, and the running costs incurred for the infrastructure pipelines installed in the road sections belonging to one of the groups, as the life cycle cost per group for each group; calculating the sum of the group-based life cycle costs for each group for each planned period within the planned period; and summing the sum of the life cycle costs for each planned period. It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0065] [3] In the infrastructure joint renewal plan planning support system described in [2], The aforementioned information processing device is Divide the multiple road sections into multiple groups using the group pattern that minimizes the total life cycle cost when calculating the total life cycle cost among multiple group patterns with different ways of dividing the groups. It is configured in such a way. Infrastructure joint planning support system.

[0066] [4] In the infrastructure joint renewal planning support system described in [1], The aforementioned information processing device is The objective function representing the total life cycle cost is set, and the determination variable is a variable in which the infrastructure pipelines installed in the road sections belonging to the group during the planned period are represented as "1" if they are updated and as "0" if they are not updated. By solving this optimization problem, the presence or absence of updates for each of the infrastructure pipelines during each planned period is calculated. It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0067] [5] In the infrastructure joint renewal planning support system described in [1], The aforementioned information processing device is The planned period for which the aforementioned renewal is calculated to occur is calculated as the renewal period for the infrastructure pipeline. If the infrastructure pipelines installed in the road section belonging to the same group, but constructed by different infrastructure contractors, have the same renewal period, and joint construction is not designated as prohibited for those infrastructure pipelines, then the presence or absence of joint construction at the renewal period of the infrastructure pipelines constructed by different infrastructure contractors shall be calculated as having joint construction. It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0068] [6] In the infrastructure joint renewal plan planning support system described in [2], The information processing device includes a storage device located either inside or outside the device, The storage device contains the road network information and The aforementioned infrastructure conduit network information, The aforementioned road infrastructure pipeline-related information, The aforementioned information regarding the feasibility of joint construction, It stores, Infrastructure joint renewal plan planning support system.

[0069] [7] In the infrastructure joint renewal plan planning support system described in [6], The storage device stores mobilization cost data, which includes the costs incurred for on-site construction during the renewal of the infrastructure pipeline, and joint construction cost reduction data, which represents the costs reduced by having multiple infrastructure contractors jointly carry out the renewal of the infrastructure pipeline at the same renewal period. The aforementioned information processing device is Based on the mobilization cost data and the reduction cost data, The cost of introducing the infrastructure pipelines designated as eligible for joint construction when they are being renovated, and the cost of introducing the infrastructure pipelines designated as not eligible for joint construction when they are being renovated, To calculate It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0070] [8] In the infrastructure joint renewal planning support system described in [1], The User device is Includes an input device capable of inputting information, Based on the information entered by the user into the input device, the infrastructure pipeline is configured to be either permitted for joint construction or not permitted for joint construction. Infrastructure joint renewal plan planning support system.

[0071] [9] In the infrastructure joint renewal planning support system described in [1], The user device includes a display device capable of displaying images, The User device is The information processing device retrieves information calculated by the information processing device, and displays an image reflecting the retrieved information on the display device. It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0072] [10-1] In the infrastructure joint renewal planning support system described in [9], The aforementioned information processing device is The first comparative total life cycle cost incurred when the infrastructure pipelines are replaced in order of their installation date during the aforementioned planning period, The second comparative total life cycle cost when each of the infrastructure pipelines is renewed at a renewal time that optimizes the total life cycle cost without considering joint construction during the aforementioned planning period, Further calculations are performed and the result is transmitted to the user device. The User device is A calculation result comparison screen including images representing the total life cycle cost, the first comparative total life cycle cost, and the second comparative total life cycle cost, Display on the aforementioned display device, It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0073] [10-2] In the infrastructure joint renewal plan planning support system described in [10-1], The aforementioned information processing device is In the aforementioned planning period, the total life cycle cost is optimized for each of the aforementioned infrastructure pipelines, and the planned investment amount required for managing the infrastructure pipelines at each of the aforementioned planning periods when the infrastructure pipelines are renewed is as follows: In the aforementioned planning period, if the infrastructure pipelines are renewed in order of their installation date, the first comparative planned investment amount required for the management of the infrastructure pipelines at each of the aforementioned planning periods, In the aforementioned planning period, if each of the aforementioned infrastructure pipelines is renewed at a renewal time that optimizes the total life cycle cost without considering joint construction, the second comparative planned investment amount required for the management of the aforementioned infrastructure pipelines at each of the aforementioned planning periods, The result is calculated and transmitted to the user device. The User device is The calculation result comparison screen further includes images representing the planned investment amount, the first comparative planned investment amount, and the second comparative planned investment amount for each of the aforementioned planned target periods, Display on the aforementioned display device, It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0074]

[11] In the infrastructure joint renewal planning support system described in [9], The aforementioned information processing device is The system calculates optimal renewal timing calculation results information, including information on infrastructure pipelines that will not be renewed, infrastructure pipelines that will be renewed through independent construction, and infrastructure pipelines that will be renewed through joint construction, for each of the aforementioned planned time periods for the infrastructure pipelines, and transmits this information to the user device. The User device is The display device displays an optimal update timing calculation result screen that includes an image representing information based on the received optimal update timing calculation result information. It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0075]

[12] In the infrastructure joint renewal planning support system described in

[11] , The aforementioned information processing device is The system calculates and transmits to the user device the optimal update timing calculation result information, which further includes the update and introduction costs for each of the planned target periods when updating each of the infrastructure pipelines, and the total lifecycle costs incurred during the planned target period. It is configured in such a way. Infrastructure joint renewal plan planning support system.

[0076]

[13] A method for supporting the formulation of a joint infrastructure renewal plan using an information processing device that formulates a joint renewal plan including the renewal timing of each of the multiple infrastructure pipelines whose renewal work is carried out by multiple infrastructure construction companies, and whether or not the renewal work will be carried out jointly at the renewal timing of each of the infrastructure pipelines, The information processing device, Road network information showing a road network including multiple road sections, Infrastructure pipeline network information indicating multiple infrastructure pipelines installed in each of the aforementioned road sections, Road infrastructure pipeline correspondence information showing the correspondence between the road section and the infrastructure pipeline installed in the road section, Information indicating whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, Based on, The road sections constituting the road network are divided into multiple groups, each of which serves as a criterion for determining whether or not there is joint construction of the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The calculation determines whether each infrastructure pipeline is to be renewed at each planned time within the planned period, such that the total lifecycle cost of the multiple infrastructure pipelines, including the total renewal introduction cost which varies depending on whether the renewal work for each infrastructure pipeline installed in the road section belonging to each group is carried out jointly during the planned period covered by the joint renewal plan for the multiple infrastructure pipelines, is optimized. Based on whether each of the aforementioned infrastructure pipelines has been renewed at each of the aforementioned planned time periods, the renewal period for each of the aforementioned infrastructure pipelines and whether or not joint construction is being carried out at each of the aforementioned renewal periods for each of the aforementioned infrastructure pipelines are calculated. Methods for supporting the development of joint infrastructure renewal plans.

[0077]

[14] An infrastructure joint renewal plan planning support device including an information processing device that formulates a joint renewal plan including the renewal timing for each of the multiple infrastructure pipelines whose renewal work is carried out by multiple infrastructure contractors, and whether or not the renewal work will be carried out jointly at the renewal timing for each of the infrastructure pipelines, The aforementioned information processing device is Road network information showing a road network including multiple road sections, Infrastructure pipeline network information indicating multiple infrastructure pipelines installed in each of the aforementioned road sections, Road infrastructure pipeline correspondence information showing the correspondence between the road section and the infrastructure pipeline installed in the road section, Information indicating whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, Based on, The road sections constituting the road network are divided into multiple groups, each of which serves as a criterion for determining whether or not there is joint construction of the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The calculation determines whether each infrastructure pipeline is to be renewed at each planned time within the planned period, such that the total lifecycle cost of the multiple infrastructure pipelines, including the total renewal introduction cost which varies depending on whether the renewal work for each infrastructure pipeline installed in the road section belonging to each group is carried out jointly during the planned period covered by the joint renewal plan for the multiple infrastructure pipelines, is optimized. Based on whether each of the aforementioned infrastructure pipelines has been renewed at each of the aforementioned planned time periods, the renewal period for each of the aforementioned infrastructure pipelines and whether or not joint construction is being carried out at each of the aforementioned renewal periods for each of the aforementioned infrastructure pipelines are calculated. It is configured in such a way. A support system for formulating joint infrastructure renewal plans.

[0078]

[15] On the computer, An infrastructure joint renewal plan planning support program that performs the process of formulating a joint renewal plan, which includes the renewal timing for each of the multiple infrastructure pipelines whose renewal work is carried out by multiple infrastructure contractors, and whether or not the renewal work will be carried out jointly at the renewal timing for each of the infrastructure pipelines, The aforementioned infrastructure joint renewal plan planning support program, To the aforementioned computer, Road network information showing a road network including multiple road sections, Infrastructure pipeline network information indicating multiple infrastructure pipelines installed in each of the aforementioned road sections, Road infrastructure pipeline correspondence information showing the correspondence between the road section and the infrastructure pipeline installed in the road section, Information indicating whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, Based on, The road sections constituting the road network are divided into multiple groups, each of which serves as a criterion for determining whether or not there is joint construction of the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The calculation determines whether each infrastructure pipeline is to be renewed at each planned time within the planned period, such that the total lifecycle cost of the multiple infrastructure pipelines, including the total renewal introduction cost which varies depending on whether the renewal work for each infrastructure pipeline installed in the road section belonging to each group is carried out jointly during the planned period covered by the joint renewal plan for the multiple infrastructure pipelines, is optimized. Based on whether each of the aforementioned infrastructure pipelines has been renewed at each of the aforementioned planned time periods, the renewal period for each of the aforementioned infrastructure pipelines and whether or not joint construction is being carried out at each of the aforementioned renewal periods for each of the aforementioned infrastructure pipelines are calculated. To execute the process Support program for formulating joint infrastructure renewal plans. [Explanation of symbols]

[0079] 101...Joint Renewal Plan Formulation Support System, 102...Joint Renewal Plan Device, 103...Communication Network, 104...User Device, 301...Storage Unit, 302...Calculation Processing Unit, 303...Road Network Data, 304...Infrastructure Pipeline Network Data, 305...Network Mapping Results, 306...Mobilization Cost Data, 307...Cost Reduction Data through Joint Construction, 308...Renewal Plan Calculation Results, 309...Network Mapping Unit, 310...Optimal Renewal Timing Calculation Unit, 311...Road Grouping Unit, 312...Life Cycle Cost Calculation Unit, 313...Renewal Introduction Cost Calculation Unit, 314...Running Cost Calculation Unit

Claims

1. An infrastructure joint renewal plan planning support device including an information processing device that plans a joint renewal plan for multiple infrastructure pipelines, each having a start point and an end point, where renewal work is carried out by multiple infrastructure construction companies, including the renewal timing for each of the said infrastructure pipelines and whether or not the renewal work will be carried out jointly at the said renewal timing for each of the said infrastructure pipelines, User equipment and Includes, An infrastructure joint renewal plan planning support system configured such that the information processing device and the user device can send and receive information from each other, The aforementioned information processing device is Road network information indicating a road network including a plurality of road sections, each having a starting point and an ending point, wherein the road network information includes location information indicating the starting point and location information indicating the ending point for each of the road sections, Infrastructure pipeline network information indicating a plurality of infrastructure pipelines installed in each of the aforementioned road sections, wherein the infrastructure pipeline network information includes location information indicating the starting point and location information indicating the ending point for each of the aforementioned infrastructure pipelines, Road infrastructure pipeline correspondence information showing the correspondence between the road section and the infrastructure pipeline installed in the road section, Information indicating whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, Based on, The road sections constituting the road network are divided into multiple groups, each of which serves as a criterion for determining whether or not there is joint construction of the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The calculation determines whether each infrastructure pipeline is to be renewed at each planned time within the planned period, such that the total lifecycle cost of the multiple infrastructure pipelines, including the total renewal introduction cost which varies depending on whether the renewal work for each infrastructure pipeline installed in the road section belonging to each group is carried out jointly during the planned period covered by the joint renewal plan for the multiple infrastructure pipelines, is optimized. Based on whether each of the aforementioned infrastructure pipelines has been renewed at each of the aforementioned planned time periods, the renewal period for each of the aforementioned infrastructure pipelines and whether or not joint construction is being carried out at each of the aforementioned renewal periods for each of the aforementioned infrastructure pipelines are calculated. It is configured in such a way. Infrastructure joint renewal plan planning support system.

2. In the infrastructure joint renewal plan planning support system described in claim 1, The aforementioned information processing device is The total life cycle cost is calculated by summing the renewal and introduction costs incurred when renewing infrastructure pipelines designated as jointly constructible and installed in the road sections belonging to one of the groups, the renewal and introduction costs incurred when renewing infrastructure pipelines designated as not jointly constructible and installed in the road sections belonging to one of the groups, and the running costs incurred for the infrastructure pipelines installed in the road sections belonging to one of the groups, as the life cycle cost per group for each group; calculating the sum of the group-based life cycle costs for each group for each planned period within the planned period; and summing the sum of the life cycle costs for each planned period. It is configured in such a way. Infrastructure joint renewal plan planning support system.

3. In the infrastructure joint renewal plan planning support system described in claim 2, The aforementioned information processing device is Divide the multiple road sections into multiple groups using the group pattern that minimizes the total life cycle cost when calculating the total life cycle cost among multiple group patterns with different ways of dividing the groups. It is configured in such a way. Infrastructure joint planning support system.

4. In the infrastructure joint renewal plan planning support system described in claim 1, The aforementioned information processing device is The objective function representing the total life cycle cost is set, and the determination variable is a variable in which the infrastructure pipelines installed in the road sections belonging to the group during the planned period are represented as "1" if they are updated and as "0" if they are not updated. By solving this optimization problem, the presence or absence of updates for each of the infrastructure pipelines during each planned period is calculated. It is configured in such a way. Infrastructure joint renewal plan planning support system.

5. In the infrastructure joint renewal plan planning support system described in claim 1, The aforementioned information processing device is The planned period for which the aforementioned renewal is calculated to occur is calculated as the renewal period for the infrastructure pipeline. If the infrastructure pipelines installed in the road section belonging to the same group, but constructed by different infrastructure contractors, have the same renewal period, and joint construction is not designated as prohibited for those infrastructure pipelines, then the presence or absence of joint construction at the renewal period of the infrastructure pipelines constructed by different infrastructure contractors shall be calculated as having joint construction. It is configured in such a way. Infrastructure joint renewal plan planning support system.

6. In the infrastructure joint renewal plan planning support system described in claim 2, The information processing device includes a storage device located either inside or outside the device, The storage device contains the road network information and The aforementioned infrastructure conduit network information, The aforementioned road infrastructure pipeline-related information, The aforementioned information regarding the feasibility of joint construction, It stores, Infrastructure joint renewal plan planning support system.

7. In the infrastructure joint renewal plan planning support system described in claim 6, The storage device stores mobilization cost data, which includes the costs incurred for on-site construction during the renewal of the infrastructure pipeline, and joint construction cost reduction data, which represents the costs reduced by having multiple infrastructure contractors jointly carry out the renewal of the infrastructure pipeline at the same renewal period. The aforementioned information processing device is Based on the mobilization cost data and the reduction cost data, The cost of introducing the infrastructure pipelines designated as eligible for joint construction when they are being renovated, and the cost of introducing the infrastructure pipelines designated as not eligible for joint construction when they are being renovated, To calculate It is configured in such a way. Infrastructure joint renewal plan planning support system.

8. In the infrastructure joint renewal plan planning support system described in claim 1, The User device is Includes an input device capable of inputting information, Based on the information entered by the user into the input device, the infrastructure pipeline is configured to be either permitted for joint construction or not permitted for joint construction. Infrastructure joint renewal plan planning support system.

9. In the infrastructure joint renewal plan planning support system described in claim 1, The user device includes a display device capable of displaying images, The User device is The information processing device retrieves information calculated by the information processing device, and displays an image reflecting the retrieved information on the display device. It is configured in such a way. Infrastructure joint renewal plan planning support system.

10. In the infrastructure joint renewal plan planning support system described in claim 9, The aforementioned information processing device is The first comparative total life cycle cost incurred when the infrastructure pipelines are renewed in order of their installation date during the aforementioned planning period, The second comparative total life cycle cost when each of the infrastructure pipelines is renewed at a renewal time that optimizes the total life cycle cost without considering joint construction during the aforementioned planning period, Further calculations are performed and the result is transmitted to the user device. The User device is A calculation result comparison screen including images representing the total life cycle cost, the first comparative total life cycle cost, and the second comparative total life cycle cost, Display on the aforementioned display device, It is configured in such a way. Infrastructure joint renewal plan planning support system.

11. In the infrastructure joint renewal plan planning support system described in claim 9, The aforementioned information processing device is The system calculates optimal renewal timing calculation results information, including information on infrastructure pipelines that will not be renewed, infrastructure pipelines that will be renewed through independent construction, and infrastructure pipelines that will be renewed through joint construction, for each of the aforementioned planned time periods for the infrastructure pipelines, and transmits this information to the user device. The User device is The display device displays an optimal update timing calculation result screen that includes an image representing information based on the received optimal update timing calculation result information. It is configured in such a way. Infrastructure joint renewal plan planning support system.

12. In the infrastructure joint renewal plan planning support system according to claim 11, The aforementioned information processing device is The system calculates and transmits to the user device the optimal update timing calculation result information, which further includes the update and introduction costs for each of the planned target periods when updating each of the infrastructure pipelines, and the total lifecycle costs incurred during the planned target period. It is configured in such a way. Infrastructure joint renewal plan planning support system.

13. A method for supporting the formulation of a joint infrastructure renewal plan using an information processing device, which formulates a joint renewal plan for multiple infrastructure pipelines, each having a start point and an end point, where renewal work is carried out by multiple infrastructure construction companies, including the renewal timing for each of the said infrastructure pipelines and whether or not the renewal work will be carried out jointly at the said renewal timing for each of the said infrastructure pipelines, The information processing device, Road network information indicating a road network including a plurality of road sections, each having a starting point and an ending point, wherein the road network information includes location information indicating the starting point and location information indicating the ending point for each of the road sections, Infrastructure pipeline network information indicating a plurality of infrastructure pipelines installed in each of the aforementioned road sections, wherein the infrastructure pipeline network information includes location information indicating the starting point and location information indicating the ending point for each of the aforementioned infrastructure pipelines, Road infrastructure pipeline correspondence information showing the correspondence between the road section and the infrastructure pipeline installed in the road section, Information indicating whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, Based on, The road sections constituting the road network are divided into multiple groups, each of which serves as a criterion for determining whether or not there is joint construction of the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The calculation determines whether each infrastructure pipeline is to be renewed at each planned time within the planned period, such that the total lifecycle cost of the multiple infrastructure pipelines, including the total renewal introduction cost which varies depending on whether the renewal work for each infrastructure pipeline installed in the road section belonging to each group is carried out jointly during the planned period covered by the joint renewal plan for the multiple infrastructure pipelines, is optimized. Based on whether each of the aforementioned infrastructure pipelines has been renewed at each of the aforementioned planned time periods, the renewal period for each of the aforementioned infrastructure pipelines and whether or not joint construction is being carried out at each of the aforementioned renewal periods for each of the aforementioned infrastructure pipelines are calculated. Methods for supporting the development of joint infrastructure renewal plans.

14. An infrastructure joint renewal plan planning support device including an information processing device that plans a joint renewal plan for multiple infrastructure pipelines, each having a start point and an end point, where renewal work is carried out by multiple infrastructure construction companies, including the renewal timing for each of the said infrastructure pipelines and whether or not the renewal work will be carried out jointly at the said renewal timing for each of the said infrastructure pipelines, The aforementioned information processing device is Road network information indicating a road network including a plurality of road sections, each having a starting point and an ending point, wherein the road network information includes location information indicating the starting point and location information indicating the ending point for each of the road sections, Infrastructure pipeline network information indicating a plurality of infrastructure pipelines installed in each of the aforementioned road sections, wherein the infrastructure pipeline network information includes location information indicating the starting point and location information indicating the ending point for each of the aforementioned infrastructure pipelines, Road infrastructure pipeline correspondence information showing the correspondence between the road section and the infrastructure pipeline installed in the road section, Information indicating whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, Based on, The road sections constituting the road network are divided into multiple groups, each of which serves as a criterion for determining whether or not there is joint construction of the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The calculation determines whether each infrastructure pipeline is to be renewed at each planned time within the planned period, such that the total lifecycle cost of the multiple infrastructure pipelines, including the total renewal introduction cost which varies depending on whether the renewal work for each infrastructure pipeline installed in the road section belonging to each group is carried out jointly during the planned period covered by the joint renewal plan for the multiple infrastructure pipelines, is optimized. Based on whether each of the aforementioned infrastructure pipelines has been renewed at each of the aforementioned planned time periods, the renewal period for each of the aforementioned infrastructure pipelines and whether or not joint construction is being carried out at each of the aforementioned renewal periods for each of the aforementioned infrastructure pipelines are calculated. It is configured in such a way. A support system for formulating joint infrastructure renewal plans.

15. On the computer, An infrastructure joint renewal plan planning support program that performs the process of formulating a joint renewal plan for multiple infrastructure pipelines, each having a start point and an end point, where renewal work is carried out by multiple infrastructure construction companies, including the renewal timing for each of the said infrastructure pipelines and whether or not the renewal work will be carried out jointly at the said renewal timing for each of the said infrastructure pipelines, The aforementioned infrastructure joint renewal plan planning support program, To the aforementioned computer, Road network information indicating a road network including a plurality of road sections, each having a starting point and an ending point, wherein the road network information includes location information indicating the starting point and location information indicating the ending point for each of the road sections, Infrastructure pipeline network information indicating a plurality of infrastructure pipelines installed in each of the aforementioned road sections, wherein the infrastructure pipeline network information includes location information indicating the starting point and location information indicating the ending point for each of the aforementioned infrastructure pipelines, Road infrastructure pipeline correspondence information showing the correspondence between the road section and the infrastructure pipeline installed in the road section, Information indicating whether each of the multiple infrastructure pipelines is designated as eligible for joint construction or not, Based on, The road sections constituting the road network are divided into multiple groups, each of which serves as a criterion for determining whether or not there is joint construction of the infrastructure pipelines that each of the multiple infrastructure contractors is responsible for constructing. The calculation determines whether each infrastructure pipeline is to be renewed at each planned time within the planned period, such that the total lifecycle cost of the multiple infrastructure pipelines, including the total renewal introduction cost which varies depending on whether the renewal work for each infrastructure pipeline installed in the road section belonging to each group is carried out jointly during the planned period covered by the joint renewal plan for the multiple infrastructure pipelines, is optimized. Based on whether each of the aforementioned infrastructure pipelines has been renewed at each of the aforementioned planned time periods, the renewal period for each of the aforementioned infrastructure pipelines and whether or not joint construction is being carried out at each of the aforementioned renewal periods for each of the aforementioned infrastructure pipelines are calculated. To execute the process Support program for formulating joint infrastructure renewal plans.

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