Construction site puddle prediction system, information terminal, and puddle prediction method

Abstract

To enable prediction of the state of puddles at a construction site.SOLUTION: A construction site puddle prediction system is provided, comprising an intermediate terrain data acquisition unit for acquiring intermediate terrain data representing three-dimensional data of intermediate terrain after the current terrain of a construction site has been worked on, a precipitation data acquisition unit for acquiring precipitation data indicative of the precipitation amount, and a puddle prediction unit for predicting the state of puddles appearing in the intermediate terrain when a rainfall of the precipitation amount is experienced in the intermediate terrain.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a ponding prediction system, an information terminal, and a ponding prediction method for a construction site.

Background Art

[0002] In the technical field related to ponding prediction systems, a ponding distribution prediction system as disclosed in Patent Document 1 is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For example, when a ponding occurs at a construction site due to rainfall, the workability of the construction site may decrease. The terrain of the construction site changes daily as the construction progresses. There is a need for a technology that can predict the state of ponding according to the progress of the construction.

[0005] An object of the present disclosure is to predict the state of ponding at a construction site.

Means for Solving the Problems

[0006] According to the present disclosure, there is provided a ponding prediction system for a construction site, including an intermediate terrain data acquisition unit that acquires intermediate terrain data indicating three-dimensional data of an intermediate terrain after the current terrain of the construction site is constructed, a precipitation data acquisition unit that acquires precipitation data indicating the amount of precipitation, and a ponding prediction unit that predicts the state of ponding occurring on the intermediate terrain when water falls on the intermediate terrain due to the precipitation.

Effects of the Invention

[0007] According to the present disclosure, the state of ponding at a construction site is predicted.

Brief Description of the Drawings

[0008]

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Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiments. The components of the embodiments described below can be combined as appropriate. Also, some components may not be used.

[0010] [Construction Management System] FIG. 1 is a schematic diagram showing a construction management system 1 according to an embodiment. The construction management system 1 manages the construction at the construction site 2. A plurality of working machines 20 operate at the construction site 2. In the embodiment, the working machines 20 include a hydraulic excavator 21, a bulldozer 22, and a dump truck 23.

[0011] As shown in FIG. 1, the construction management system 1 includes a server 3 and an aircraft 4. The server 3 includes a computer system. The server 3 may be arranged at the construction site 2 or at a remote location from the construction site 2. The aircraft 4 flies over the construction site 2. As the aircraft 4, an unmanned aerial vehicle (UAV) such as a drone is exemplified.

[0012] The server 3, the working machine 20, and the aircraft 4 communicate with each other via a communication system 5. Examples of the communication system 5 include the internet, a local area network (LAN), a mobile phone communication network, and a satellite communication network.

[0013] [Server] FIG. 2 is a functional block diagram showing the construction management system 1 according to the embodiment. In the embodiment, the construction management system 1 includes a puddle prediction system for the construction site 2. As shown in FIG. 2, the construction management system 1 includes a server 3, a three-dimensional sensor 6, an input device 7, and an output device 8.

[0014] The three-dimensional sensor 6 detects the construction site 2. The three-dimensional sensor 6 acquires three-dimensional data indicating the three-dimensional shape of the terrain of the construction site 2. The detection data of the three-dimensional sensor 6 includes the three-dimensional data of the construction site 2. The three-dimensional sensor 6 is arranged on the flying object 4. The three-dimensional sensor 6 detects the construction site 2 from above the construction site 2. As the three-dimensional sensor 6, a laser sensor (LIDAR: Light Detection and Ranging) that detects a detection target by emitting laser light is exemplified. Note that the three-dimensional sensor 6 may be an infrared sensor that detects an object by emitting infrared light or a radar sensor (RADAR: Radio Detection and Ranging) that detects an object by emitting radio waves. Note that the three-dimensional sensor 6 may be a three-dimensional camera such as a stereo camera. The detection data of the three-dimensional sensor 6 is transmitted to the server 3 via the communication system 5. Note that the three-dimensional sensor 6 may be arranged on the working machine 20. The three-dimensional sensor 6 may be installed on a structure provided at the construction site 2.

[0015] The input device 7 generates input data when operated by the user. As the input device 7, a touch panel (touch sensor) is exemplified. Note that the input device 7 may include at least one of a computer keyboard and a mouse. The input device 7 may include a voice input device. The input data generated in the input device 7 is transmitted to the server 3.

[0016] The output device 8 provides output data to the user. The output device 8 may be a display device that displays display data as the output data. As the display device, a flat panel display such as a liquid crystal display or an organic EL display is exemplified. Note that the output device 8 may include a voice output device. The output device 8 outputs the output data transmitted from the server 3.

[0017] The server 3 includes a current terrain data storage unit 31, a construction plan acquisition unit 32, an intermediate terrain data acquisition unit 33, a precipitation data acquisition unit 34, a water pool prediction unit 35, an outflow prediction unit 36, a drainage condition calculation unit 37, and an output unit 38.

[0018] The existing terrain data storage unit 31 stores existing terrain data indicating three-dimensional data of the existing terrain of the construction site 2. The existing terrain data is acquired by the three-dimensional sensor 6. The existing terrain data is terrain data indicating the three-dimensional shape of the existing terrain of the construction site 2. The existing terrain data includes position data of a plurality of points. The position data of the points is three-dimensional coordinate data including latitude data, longitude data, and elevation data. Note that the existing terrain data may be data generated using three-dimensional CAD (Computer Aided Design), or may be data generated in a predetermined institution such as the Geospatial Information Authority of Japan.

[0019] The construction plan acquisition unit 32 acquires the construction plan of the construction site 2. The construction plan is a construction plan for the existing terrain. The construction plan includes the construction capabilities, the planned number of operating units, and the planned operating hours of the work machines 20 scheduled to be introduced into the construction site 2. In addition, the construction plan includes the planned construction range, the planned amount of cut soil, and the planned amount of filled soil of the earth and sand. In addition, the construction plan includes the construction procedure. The construction plan may be formulated for each future construction day. The construction plan is input from the input device 7 to the server 3. The construction plan acquisition unit 32 acquires the construction plan from the input device 7. Note that when the construction plan is registered in advance in the database, the construction plan acquisition unit 32 may acquire the construction plan from the database.

[0020] The intermediate terrain data acquisition unit 33 acquires intermediate terrain data indicating three-dimensional data of the intermediate terrain of the construction site 2 after the existing terrain has been constructed. The intermediate terrain is terrain data indicating the three-dimensional shape of the terrain of the construction site 2 after at least a part of the existing terrain has been constructed. Similar to the existing terrain data, the intermediate terrain data includes position data of a plurality of points. The position data of the points is three-dimensional coordinate data including latitude data, longitude data, and elevation data.

[0021] In an embodiment, the intermediate terrain data acquisition unit 33 calculates intermediate terrain data based on the current terrain data stored in the current terrain data storage unit 31 and the construction plan acquired by the construction plan acquisition unit 32. The intermediate terrain data acquisition unit 33 predicts future intermediate terrain data based on the current terrain data and the construction plan. The intermediate terrain data acquisition unit 33 simulates the transition of the intermediate terrain that changes with the progress of construction based on the current terrain data and the construction plan.

[0022] FIG. 3 is a schematic diagram for explaining a method of calculating intermediate terrain data according to an embodiment. The current terrain data is pre-stored in the current terrain data storage unit 31. The construction plan is a construction plan for the current terrain. The intermediate terrain data acquisition unit 33 can predict the intermediate terrain data several days later based on, for example, the construction plan from the current time to several days later.

[0023] The intermediate terrain is generated by constructing at least a part of the current terrain. The terrain of the construction site changes daily with the progress of construction. The construction site is constructed so that the terrain of the construction site becomes the final target terrain. The current terrain is constructed to reach the final target terrain. The intermediate terrain is the terrain of the construction site at an intermediate point in time from the current terrain to the final target terrain. There are a plurality of intermediate terrains from the current terrain to the final target terrain based on arbitrary construction conditions.

[0024] Note that a technique for simulating the transition of the terrain of a construction site that changes with the progress of construction based on a construction plan including unit data, construction condition data, and construction quantity data is disclosed in International Publication No. 2017 / 170968.

[0025] The precipitation data acquisition unit 34 acquires precipitation data indicating the precipitation at the construction site 2. The precipitation data indicates the precipitation predicted in the future. The precipitation data is input from the input device 7 to the server 3. The precipitation data acquisition unit 34 acquires the precipitation from the input device 7. If it is possible to acquire the precipitation predicted by the Meteorological Agency from the Internet, the precipitation data acquisition unit 34 may acquire the precipitation data from the Internet.

[0026] The precipitation data acquired by the precipitation data acquisition unit 34 includes the standard precipitation at the construction site during a predetermined period. The predetermined period includes any time or season. In the case of a construction site where there are rainy and dry seasons, the predetermined period includes the rainy or dry season. The predetermined period may be determined based on the expected construction period. The standard precipitation includes the average precipitation during the predetermined period in the past.

[0027] The ponding prediction unit 35 predicts the state of ponding that occurs on the intermediate terrain when water falls on the intermediate terrain with the precipitation acquired by the precipitation data acquisition unit 34.

[0028] The outflow prediction unit 36 predicts the outflow state in which the water in the pond formed at the construction site 2 flows out to the outside of the construction site 2 based on the intermediate terrain data calculated by the intermediate terrain data acquisition unit 33 and the precipitation data acquired by the precipitation data acquisition unit 34. The outflow state includes the outflow position and outflow volume of the water flowing out to the outside of the construction site 2.

[0029] The drainage condition calculation unit 37 calculates the drainage conditions for discharging the water in the pond to the outside of the construction site 2 based on the state of the pond predicted by the ponding prediction unit 35.

[0030] The output unit 38 causes the output device 8 to output the state of the pond predicted by the ponding prediction unit 35. The output unit 38 causes the output device 8 to output the outflow state predicted by the outflow prediction unit 36. The output unit 38 causes the output device 8 to output the drainage conditions calculated by the drainage condition calculation unit 37.

[0031] [Ponding Prediction Method] Figure 4 is a flowchart showing a method for predicting puddles at the construction site 2 according to the embodiment. The puddle prediction unit 35 acquires the intermediate terrain data calculated by the intermediate terrain data acquisition unit 33 from the intermediate terrain data acquisition unit 33 (step S50).

[0032] The puddle prediction unit 35 divides the intermediate terrain data into a plurality of meshes 9 (step S51). In the following description, the mesh 9 that divides the intermediate terrain data of the construction site 2 is appropriately referred to as the inner mesh 9A.

[0033] The elevation data of the intermediate terrain data is discretized. Each of the inner meshes 9A includes the discretized elevation data. The elevation of the inner mesh 9A is represented by discrete values.

[0034] The puddle prediction unit 35 adds a mesh 9 outside the outer edge of the intermediate terrain data of the construction site 2 (step S52). In the following description, the mesh 9 added outside the outer edge of the construction site 2 is appropriately referred to as the outer mesh 9B.

[0035] Figure 5 is a schematic diagram showing the intermediate terrain data of the construction site 2 divided into meshes 9 according to the embodiment. As shown in Figure 5, the intermediate terrain data is divided into a plurality of meshes 9. The mesh 9 includes an inner mesh 9A that divides the intermediate terrain data of the construction site 2 and an outer mesh 9B that is added outside the outer edge of the construction site 2. The outer mesh 9B is adjacent to the outer edge of the construction site 2.

[0036] Similar to the inner mesh 9A, the outer mesh 9B includes elevation data. The elevation of the outer mesh 9B is represented by discrete values. The puddle prediction unit 35 assigns an elevation to the outer mesh 9B that is one step lower than the elevation of the inner mesh 9A adjacent to the outer mesh 9B.

[0037] The puddle prediction unit 35 compares the elevations of the plurality of inner meshes 9A and registers the inner mesh 9A with the lowest elevation as a depression (step S53).

[0038] FIG. 6 is a schematic diagram showing the depression 10 according to the embodiment. As shown in FIG. 6, the ponding prediction unit 35 compares the elevations of a plurality of inner meshes 9A and registers the inner mesh 9A with the lowest elevation as a depression. In the example shown in FIG. 6, the ponding prediction unit 35 registers the depressions 10A and 10B as the depression 10.

[0039] The ponding prediction unit 35 compares the elevations of adjacent inner meshes 9A to create a flow water distribution rate map in eight predetermined directions (step S54).

[0040] Each of FIGS. 7 and 8 is a diagram for explaining the flow water distribution rate according to the embodiment. As shown in FIG. 7, eight inner meshes 9Ab are arranged around the inner mesh 9Aa at the center. The eight surrounding inner meshes 9Ab are arranged on the east side, west side, south side, north side, southeast side, northeast side, southwest side, and northwest side of the inner mesh 9Aa at the center, respectively. The ponding prediction unit 35 compares the elevation of the inner mesh 9Aa at the center with each of the eight surrounding inner meshes 9Ab. The ponding prediction unit 35 calculates a flow water distribution ratio indicating the ratio of the flow rate of water flowing from the inner mesh 9Aba at the center to each of the eight surrounding inner meshes 9Ab based on the elevation difference between the inner mesh 9Aa and the inner mesh 9Ab. As shown in FIG. 8, the greater the elevation difference between the inner mesh 9Aa and the inner mesh 9Ab, the greater the flow rate of water flowing from the inner mesh 9Aa to the inner mesh 9Ab. The smaller the elevation difference between the inner mesh 9Aa and the inner mesh 9Ab, the smaller the flow rate of water flowing from the inner mesh 9Aa to the inner mesh 9Ab. The ponding prediction unit 35 calculates the flow water distribution ratio for each of the plurality of inner meshes 9A. The ponding prediction unit 35 creates a flow water distribution ratio map consisting of the flow water distribution ratios for each of the plurality of inner meshes 9A.

[0041] The ponding prediction unit 35 calculates the flow rate of water sent from each of the plurality of inner meshes 9A to the depression 10 based on the depression 10 registered in step S53 and the flow water distribution ratio map created in step S54 (step S55).

[0042] The ponding prediction unit 35 registers, as a mountain pass, the innermost mesh 9A with the lowest elevation among the innermost meshes 9A that send water to the plurality of depressions 10 (step S56).

[0043] Based on the depression 10 registered in step S53 and the mountain pass registered in step S56, the ponding prediction unit 35 creates a model of the intermediate terrain (step S57).

[0044] FIG. 9 is a diagram for explaining the model of the intermediate terrain according to the embodiment. As shown in FIG. 9, the ponding prediction unit 35 creates a graph model that models, in a tree structure, the relationships between the plurality of depressions 10 and the relationships between the depressions 10 and the mountain passes by connecting the mountain pass and the depression 10 adjacent to the mountain pass, taking into account the elevation of the depressions 10.

[0045] The ponding prediction unit 35 inputs precipitation data into the model created in step S57 (step S58).

[0046] As described above, the precipitation data includes the standard precipitation for a predetermined period at the construction site. The precipitation when rainfall of 100 mm per hour continues for 10 hours may be input into the model of the intermediate terrain, or the total precipitation of 500 mm in a predetermined period may be input. If the expected construction period is, for example, July, the standard precipitation in July at the construction site may be input into the model of the intermediate terrain. If the expected construction period is, for example, three months from May 1 to July 31, and the intermediate terrain during the construction period is simulated, the precipitation may be input into the model of the intermediate terrain at any point in time during the construction period. The predicted precipitation for one day including any point in time predicted by the weekly weather forecast may be input into the model of the intermediate terrain.

[0047] By inputting the precipitation data into the model, the ponding prediction unit 35 outputs the state of the ponding that occurs on the intermediate terrain when water falls on the intermediate terrain with the precipitation defined by the precipitation data (step S59).

[0048] The state of the puddles includes the amount of water accumulated in each of the plurality of depressions 10, the flooded area in the intermediate terrain, and the water depth.

[0049] FIG. 10 is a diagram for explaining the inflow area 12 according to the embodiment. As shown in FIG. 10, based on the relationship between the pass and the depression, the puddle prediction unit 35 can calculate the inflow area 12 for flowing water into the depression 10. In the example shown in FIG. 10, the puddle prediction unit 35 calculates an inflow area 12A for flowing water into the depression 10A and an inflow area 12B for flowing water into the depression 10B.

[0050] [Calculation of outflow state] Based on the intermediate terrain data calculated by the intermediate terrain data acquisition unit 33 and the precipitation data acquired by the precipitation data acquisition unit 34, the outflow prediction unit 36 predicts the outflow state in which the water in the puddle generated at the construction site 2 flows out to the outside of the construction site 2. The outflow state includes the outflow position and the outflow amount of the water flowing out to the outside of the construction site 2.

[0051] FIG. 11 is a diagram for explaining the outflow state according to the embodiment. As described above, the outer mesh 9B is defined outside the outer edge of the intermediate terrain. The elevation of the outer mesh 9B is one step lower than the elevation of the inner mesh 9A adjacent to the outer mesh 9B. Based on the elevation of each of the plurality of inner meshes 9A, the elevation of the outer mesh 9B, and the precipitation data, the outflow prediction unit 36 can calculate the outflow position 13 and the outflow amount of the water in the puddle generated at the construction site 2 flowing out to the outside of the construction site 2. Based on the amount of water accumulated in each of the plurality of depressions 10 calculated in step S59, the flooded area in the intermediate terrain, the water depth, and the elevation of the outer mesh 9B, the outflow prediction unit 36 can calculate the outflow position 13 and the outflow amount of the water in the puddle generated at the construction site 2 flowing out to the outside of the construction site 2.

[0052] [Construction management method] FIG. 12 is a flowchart showing the construction management method according to the embodiment. The intermediate terrain data acquisition unit 33 acquires the current terrain data from the current terrain data storage unit 31 (step S1). The intermediate terrain data acquisition unit 33 acquires the construction plan from the construction plan acquisition unit 32 (step S2).

[0053] Based on the current terrain data acquired in step S1 and the construction plan acquired in step S2, the intermediate terrain data acquisition unit 33 predicts the future intermediate terrain data (step S3).

[0054] The precipitation data acquisition unit 34 acquires the precipitation data (step S4). Based on the intermediate terrain data predicted in step S3 and the precipitation data acquired in step S4, the puddle prediction unit 35 predicts the state of the puddles formed in the intermediate terrain (step S5). The puddle prediction unit 35 predicts the state of the puddles formed in the intermediate terrain based on the puddle prediction method described with reference to FIG. 4.

[0055] Based on the intermediate terrain data predicted in step S3 and the precipitation data acquired in step S4, the outflow prediction unit 36 predicts the outflow state in which the water in the puddles formed in the intermediate terrain flows outside the construction site 2 (step S6).

[0056] Based on the state of the puddles predicted in step S5, the drainage condition calculation unit 37 calculates the drainage conditions for discharging the water in the puddles outside the construction site 2 (step S7).

[0057] The output unit 38 causes the output device 8 to output the state of the puddles predicted by the puddle prediction unit 35. The output unit 38 causes the output device 8 to output the outflow state predicted by the outflow prediction unit 36. The output unit 38 causes the output device 8 to output the drainage conditions calculated by the drainage condition calculation unit 37.

[0058] FIG. 13 is a diagram for explaining the drainage conditions calculated by the drainage condition calculation unit 37 according to the embodiment. The drainage condition calculation unit 37 outputs drainage conditions based on the state of the water pool predicted by the water pool prediction unit 35. The drainage conditions output from the drainage condition calculation unit 37 are recommended conditions for drainage. The drainage condition calculation unit 37 outputs, for example, recommendation data for recommending installing the drain pipe 14 in the depression 10 with the largest amount of water in the plurality of depressions 10. Further, the drainage condition calculation unit 37 outputs, for example, recommendation data indicating the recommended installation position and the recommended number of the drain pipes 14 so that drainage can be efficiently performed based on the flooded area. Further, the drainage condition calculation unit 37 outputs recommendation data indicating a recommended value of the pipe diameter of the drain pipe 14 that can efficiently drain water based on the amount of water in the water pool. Since the recommendation data related to the drainage conditions is output, for example, the installation of unnecessary drain pipes 14 is suppressed, and drainage is efficiently performed.

[0059] A water storage tank 15 is provided outside the construction site. The water discharged outside the construction site through the drain pipe 14 is stored in the water storage tank 15. The drainage condition calculation unit 37 can calculate the outflow condition in which water overflows from the water storage tank 15 based on, for example, the volume of the water storage tank 15 and the flow rate of the water flowing through the drain pipe 14. The outflow condition in which water overflows from the water storage tank 15 includes the time from an arbitrary point in time until water overflows from the water storage tank 15. The volume of the water storage tank 15 is known data. By detecting the flow rate of the water flowing through the drain pipe 14 with a flow rate sensor, the drainage condition calculation unit 37 can calculate the outflow condition in which water overflows from the water storage tank 15.

[0060] [Computer System] FIG. 14 is a block diagram showing a computer system 1000 according to an embodiment. The above-described server 3 includes the computer system 1000. The computer system 1000 has a processor 1001 such as a CPU (Central Processing Unit), a main memory 1002 including a non-volatile memory such as a ROM (Read Only Memory) and a volatile memory such as a RAM (Random Access Memory), a storage 1003, and an interface 1004 including an input / output circuit. The functions of the above-described server 3 are stored in the storage 1003 as a computer program. The processor 1001 reads the computer program from the storage 1003 and expands it in the main memory 1002, and executes the above-described processing according to the program. Note that the computer program may be distributed to the computer system 1000 via a network.

[0061] The computer program or the computer system 1000 can execute, according to the above-described embodiment, acquiring intermediate terrain data indicating three-dimensional data of an intermediate terrain after the current terrain of the construction site 2 has been constructed, acquiring precipitation data indicating precipitation, and predicting the state of water accumulation occurring in the intermediate terrain when water falls on the intermediate terrain due to precipitation.

[0062] [Effect] As described above, according to the embodiment, the construction management system 1 can predict the state of water accumulation at the construction site 2. The construction management system 1 predicts the state of water accumulation occurring in the intermediate terrain when water falls on the intermediate terrain. The terrain of the construction site 2 changes daily as the construction progresses. By predicting the state of water accumulation in the intermediate terrain, the state of water accumulation according to the progress of the construction is predicted.

[0063] In the embodiment, the intermediate terrain is predicted based on the construction plan, and the state of water accumulation management in the predicted intermediate terrain is predicted. Since the state of the intermediate terrain and water accumulation in the future is predicted, for example, the construction plan can be changed so that water accumulation does not occur.

[0064] In an embodiment, an outflow state in which water in a water pool formed in intermediate terrain flows out to the outside of construction site 2 is predicted. Thereby, for example, the construction plan can be changed so that water does not flow out to the outside of construction site 2, or measures can be taken to prevent water from flowing out to the outside of construction site 2.

[0065] In an embodiment, the construction management system 1 proposes drainage conditions for discharging water in a water pool formed in intermediate terrain to the outside of construction site 2. Thereby, facilities for drainage are efficiently installed, and installation of unnecessary facilities is suppressed.

[0066] [Other Embodiments] In the above-described embodiment, intermediate terrain data in the future is predicted based on the construction plan. The intermediate terrain data may be acquired by the three-dimensional sensor 6. The state of a water pool formed in the intermediate terrain detected by the three-dimensional sensor 6 may be predicted.

[0067] In the above-described embodiment, the intermediate terrain data acquisition unit 33 calculates intermediate terrain data by simulating the transition of the intermediate terrain that changes as construction progresses based on the current terrain data and the construction plan. The intermediate terrain data may be input to the intermediate terrain data acquisition unit 33 via, for example, the input device 7. Further, the user can generate intermediate terrain data by operating the input device 7 to process the current terrain data. By displaying the current terrain data on the output device 8 (display device), the user can operate the input device 7 while checking the current terrain data displayed on the output device 8 to process the current terrain data. The intermediate terrain data generated by processing the current terrain data may be input to the intermediate terrain data acquisition unit 33.

[0068] In the above-described embodiment, the terrain of the construction site 2 (the existing terrain or the intermediate terrain) is detected by the three-dimensional sensor 6. The terrain of the construction site 2 may be detected by the working machine 20. For example, a position sensor such as a GNSS receiver is mounted on the revolving body of the hydraulic excavator 21, and the relative position between the revolving body and the bucket of the working machine that touches the surface of the terrain of the construction site 2 is calculated, whereby the three-dimensional shape of the terrain of the construction site 2 is obtained. For example, a position sensor such as a GNSS receiver is mounted on the vehicle body of the dump truck 23, and the relative position between the vehicle body and the ground contact surface of the tire that touches the surface of the terrain of the construction site 2 is calculated, whereby the three-dimensional shape of the terrain of the construction site 2 is obtained.

[0069] In the above-described embodiment, the existing terrain data is stored in the existing terrain data storage unit 31. The existing terrain data may be input to the intermediate terrain data acquisition unit 33 via the input device 7, for example.

[0070] In the above-described embodiment, the puddle prediction unit 35 may predict the state of the puddles formed in the intermediate terrain in consideration of the amount of water held in the soil of the intermediate terrain.

[0071] In the above-described embodiment, each of the existing terrain data storage unit 31, the construction plan acquisition unit 32, the intermediate terrain data acquisition unit 33, the precipitation data acquisition unit 34, the puddle prediction unit 35, the outflow prediction unit 36, the drainage condition calculation unit 37, and the output unit 38 may be configured by separate hardware.

[0072] FIG. 15 is a diagram showing the information terminal 600 according to the embodiment. In the above-described embodiment, each of the current terrain data storage unit 31, the construction plan acquisition unit 32, the intermediate terrain data acquisition unit 33, the precipitation data acquisition unit 34, the puddle prediction unit 35, the runoff prediction unit 36, the drainage condition calculation unit 37, and the output unit 38 is included in the server 3. As shown in FIG. 15, the information terminal 600 may include each of the current terrain data storage unit 31, the construction plan acquisition unit 32, the intermediate terrain data acquisition unit 33, the precipitation data acquisition unit 34, the puddle prediction unit 35, the runoff prediction unit 36, the drainage condition calculation unit 37, and the output unit 38. Examples of the information terminal 600 include a tablet terminal, a smartphone, and a personal computer. The information terminal 600 includes a computer system 500 having a processor 100, a main memory 200, a storage 300, and an interface 400. Further, the information terminal 600 includes an input device 410 and a display device 420 which is an output device. The display device 420 provides display data to the user. The display device 420 has a display screen on which the display data is displayed. Examples of the display device 420 include a flat panel display such as a liquid crystal display or an organic EL display. The input device 410 generates input data when operated by the user. Examples of the input device 410 include a touch panel (touch sensor) arranged on the display screen of the display device 420. Note that the input device 410 may include at least one of a computer keyboard and a mouse. The input device 410 may include a voice input device. The processor 100 of the information terminal 600 includes an intermediate terrain data acquisition unit 33 that acquires intermediate terrain data indicating three-dimensional data of the intermediate terrain after the current terrain of the construction site is constructed, a precipitation data acquisition unit 34 that acquires precipitation data indicating precipitation, a puddle prediction unit 35 that predicts the state of puddles generated on the intermediate terrain when water falls on the intermediate terrain due to precipitation, and an output unit 38 that causes the display device 420 to display the state of puddles predicted by the puddle prediction unit 35.

Description of Signs

[0073] 1... Construction management system, 2... Construction site, 3... Server, 4... Flying object, 5... Communication system, 6... 3D sensor, 7... Input device, 8... Output device, 9... Mesh, 9A... Inner mesh, 9B... Outer mesh, 10... Depression, 10A... Depression, 10B... Depression, 12... Inflow area, 12A... Inflow area, 12B... Inflow area, 13... Outflow position, 14... Drain pipe, 15... Storage pond, 20... Working machine, 21... Hydraulic excavator, 22... Bulldozer, 23... Dump truck, 31... Existing terrain data storage unit, 32... Construction plan acquisition unit, 33... Intermediate terrain data acquisition unit, 34... Precipitation data acquisition unit, 35... Water accumulation prediction unit, 36... Outflow prediction unit, 37... Drainage condition calculation unit, 38... Output unit, 100... Processor, 200... Main memory, 300... Storage, 400... Interface, 410... Input device, 420... Display device, 500... Computer system, 600... Information terminal, 1000... Computer system, 1001... Processor, 1002... Main memory, 1003... Storage, 1004... Interface.

Claims

1. An intermediate terrain data acquisition unit that acquires intermediate terrain data indicating three-dimensional data of an intermediate terrain after the current terrain at a construction site has been constructed; A precipitation data acquisition unit that acquires precipitation data indicating precipitation; A ponding prediction unit that predicts the state of ponding that occurs on the intermediate terrain when water falls on the intermediate terrain with the precipitation; and A ponding prediction system for a construction site.

2. An output unit that causes the output device to output the state of ponding predicted by the ponding prediction unit; The ponding prediction system for a construction site according to Claim 1.

3. A construction plan acquisition unit that acquires a construction plan for the construction site; The intermediate terrain data acquisition unit calculates the intermediate terrain data based on the current terrain data indicating three-dimensional data of the current terrain and the construction plan; The ponding prediction system for a construction site according to Claim 1.

4. The precipitation data includes precipitation for a predetermined period at the construction site; The ponding prediction system for a construction site according to Claim 1.

5. An outflow prediction unit that predicts an outflow state in which water in the ponding flows out of the construction site based on the intermediate terrain data and the precipitation data; The ponding prediction system for a construction site according to Claim 1.

6. A drainage condition calculation unit that calculates drainage conditions for discharging water in the ponding to the outside of the construction site based on the state of the ponding predicted by the ponding prediction unit; The ponding prediction system for a construction site according to Claim 1.

7. Water discharged to the outside of the construction site is stored in a storage pond; The drainage condition calculation unit calculates an outflow condition in which water overflows from the storage pond; The ponding prediction system for a construction site according to Claim 6.

8. An intermediate terrain data acquisition unit that acquires intermediate terrain data indicating three-dimensional data of an intermediate terrain after the current terrain at a construction site has been constructed; A precipitation data acquisition unit that acquires precipitation data indicating precipitation; A ponding prediction unit that predicts the state of ponding that occurs on the intermediate terrain when water falls on the intermediate terrain with the precipitation; An output unit that causes the output device to output the state of ponding predicted by the ponding prediction unit; and An information terminal.

9. Acquiring intermediate terrain data indicating three-dimensional data of an intermediate terrain after the current terrain at a construction site has been constructed; Acquiring precipitation data indicating precipitation; Predicting the state of the water pool formed in the intermediate terrain when water falls on the intermediate terrain with the precipitation amount, and A method for predicting water pools at a construction site.

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