Bridge renewal method and support system

Abstract

To provide a renewal method capable of shortening the construction period for bridge renewal work, including the period of traffic restrictions, and a support system.SOLUTION: A support system 10 is a system for supporting the renewal of a bridge with multiple decks placed side by side in the bridge axis direction. The support system 10 acquires a piece of road point cloud data of an existing bridge captured from above the existing bridge and a piece of existing bridge underpass point cloud data captured from under the existing bridge and creates a 3D model of the existing bridge by combining the road point cloud data and underpass point cloud data. The support system 10 allocates decks through allocation simulation based on the 3D model and allocation rules, and on the basis of division decks obtained by dividing the allocated decks by the number of divided constructions, creates design data for the new deck.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a bridge renewal method and support system. [Background technology]

[0002] Renewal work is currently being carried out to renew an existing bridge. In this renewal work, for example, as in Patent Document 1, deck slabs arranged side by side in the bridge axis direction are replaced. Specifically, scaffolding is first erected around the bridge, and the bridge is surveyed using the scaffolding. Then, based on the survey results and the as-built drawings created during construction, the differences between the current bridge and the as-built drawings are identified. Next, a designer designs the new deck slab by allocating the new slab to be actually installed based on the as-built drawings, the differences between the current bridge and the as-built drawings, and the allocation rules. The new deck slab is fabricated based on the designer's design and then transported to the construction site. At the construction site, the existing deck slab is removed to expose the existing girders, and the new deck slab is then installed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-085172 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned renovation work is carried out under traffic restrictions, such as road closures on expressways, which can lead to traffic congestion and congestion on roads around the construction site. For this reason, there is a need to shorten the construction period for bridge renovation work, including the period of traffic restrictions. [Means for solving the problem]

[0005] A bridge renewal method that solves the above-mentioned problems is a bridge renewal method for renovating a bridge with multiple decks arranged side by side in the bridge axis direction, in which a support system that supports the bridge renewal allocates the decks using an allocation simulation based on a 3D model of the existing bridge and allocation rules, and creates design data for the new deck based on the divided decks that are obtained by dividing the allocated decks according to the number of divided construction works. [Effects of the Invention]

[0006] According to the present invention, the construction period for bridge renewal work can be shortened. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a flowchart showing the flow of an embodiment of a bridge renewal method. [Figure 2] FIG. 1 is a diagram illustrating a schematic configuration of an embodiment of a support system. [Figure 3] FIG. 2 is a diagram illustrating an example of a hardware configuration of an information processing device. [Figure 4] 1 is a flowchart showing the flow of a design preparation process. [Figure 5] FIG. 1 is a diagram illustrating an example of a method for acquiring road point cloud data. [Figure 6] FIG. 10 is a diagram illustrating an example of a method for acquiring under-road point cloud data. [Figure 7] 1 is a flowchart showing the flow of a design process. [Figure 8] FIG. 10 is a diagram schematically illustrating a representative diagram of an allocation draft. [Figure 9] FIG. 10 is a diagram showing an image of dividing an allocation floor slab according to the number of divisions. [Figure 10] FIG. 1 is a diagram schematically illustrating an example of a deck draft. [Figure 11] This is a diagram showing a schematic diagram of one of the check items for the deck draft. [Figure 12] FIG. 10 is a diagram schematically illustrating an example of a heat map for a divided floor slab. [Figure 13]FIG. 10 is a diagram showing a schematic view of a finished product simulation. [Figure 14] FIG. 1 is a diagram schematically illustrating on-site work using a construction support system. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of a bridge renewal method and a support system therefor will be described with reference to Figures 1 to 14. Note that in this embodiment, a case where an existing deck slab is replaced in renewal construction will be described.

[0009] As shown in Figure 1, renewal work to replace the existing deck of an existing bridge involves a design preparation process (step S101), a design process (step S102), a deck production process (step S103), a construction preparation process (step S104), and a construction process (step S105).

[0010] As shown in FIG. 2, a support system 10 that supports renewal work includes a design support system 20, a production support system 30, and a construction support system 40. The design support system 20 is a system used by designers who design renewal work. The design support system 20 includes a design support device 21. The production support system 30 is a system used by producers who produce replacement objects such as deck slabs. The production support system 30 includes the production support device 31. The construction support system 40 is a system used by contractors who carry out renewal work. The construction support system 40 includes the construction support device 41. These support devices (21, 31, 41) are configured to be able to communicate with each other via the server 100. In other words, each support device (21, 31, 41) is configured to be able to share information uploaded to the server 100.

[0011] As shown in FIG. 3, each of the support devices (21, 31, 41) is configured around an information processing device H10. The information processing device H10 includes a communication device H11, an input device H12, a display device H13, a storage device H14, and a processor H15. Note that this hardware configuration is an example, and the information processing device H10 may include other hardware.

[0012] The communication device H11 is an interface that establishes a communication path with other devices and transmits and receives data. The input device H12 is a device that receives input from an operator, such as a mouse or keyboard. The display device H13 is a display or touch panel that displays various information. The storage device H14 is a storage unit that stores data and various programs for executing various functions. Examples of the storage device H14 include a ROM, a RAM, a hard disk, etc.

[0013] The processor H15 controls each process in each support device using programs and data stored in the storage device H14. Examples of the processor H15 include a CPU and an MPU. The processor H15 loads programs stored in a ROM or the like into a RAM and executes various processes corresponding to the various processes. For example, when a specific application program is launched, the processor H15 runs a process that executes each process according to the program.

[0014] The processor H15 is not limited to a processor that performs all of its processing using software. For example, the processor H15 may include a dedicated hardware circuit (e.g., an application-specific integrated circuit (ASIC)) that performs hardware processing for at least some of the processing it performs. That is, the processor H15 may be configured as follows:

[0015] (1) One or more processors operating according to a computer program (software) (2) One or more dedicated hardware circuits that perform at least some of the processes; or (3) Circuits including combinations thereof The processor H15 includes a CPU and memory, such as RAM and ROM, that stores program code or instructions configured to cause the CPU to perform processes. Memory, i.e., computer-readable media, includes any available media that can be accessed by a general-purpose or special-purpose computer.

[0016] (Design preparation process) The design preparation process (step S101) is carried out using the design support system 20. In the design preparation process, an existing bridge is photographed to obtain point cloud data, and CIM data for the existing bridge is created based on the point cloud data. The point cloud data for the existing bridge is composed of on-road point cloud data photographed from above and under-road point cloud data photographed from below. At each point on the existing bridge, a control point is provided that serves as a reference when combining the on-road point cloud data and the under-road point cloud data.

[0017] As shown in FIG. 4, the design preparation process includes an on-road point cloud data acquisition process (step S201), an under-road point cloud data acquisition process (step S202), and a model creation process (step S203).

[0018] As shown in FIG. 5, in the road point cloud data acquisition process (step S201), road point cloud data is acquired using a road camera 23 mounted on an unmanned aerial vehicle 22 whose flight area is the periphery of an existing bridge 50.

[0019] The right side of the existing bridge 50 is imaged using an unmanned aerial vehicle 22 flying on the right side of the existing bridge 50. The left side of the existing bridge 50 is imaged using an unmanned aerial vehicle 22 flying on the left side of the existing bridge 50. It is preferable that the road camera 23 images from a 45-degree angle and a 60-degree angle relative to a predetermined reference point of the existing bridge 50 so that traffic will not be obstructed even if the unmanned aerial vehicle 22 falls. The road camera 23 acquires road point cloud data by imaging the existing bridge 50 from above while flying the unmanned aerial vehicle 22 above the existing bridge 50. The road point cloud data is input to the design support device 21 by connecting the road camera 23 to the design support device 21.

[0020] As shown in FIG. 6 , in the under-road point cloud data acquisition process (step S202), under-road point cloud data is acquired by an under-road camera 26 mounted on a mobile robot 25 moving along an existing girder 51. The mobile robot 25 is supported on the lower flanges 52 of a pair of adjacent existing girders 51 perpendicular to the bridge axis and is configured to be movable in the bridge axis direction. The mobile robot 25 has a moving machine 27 and an erection member 28. The moving machine 27 moves on the lower flanges 52 of each existing girder 51 in the bridge axis direction by rolling on the lower flanges 52 of each existing girder 51 with rollers 29 arranged to sandwich the webs 53. The erection member 28 connects the lower end of the moving machine 27 below the existing girder 51. The under-road camera 26 is mounted on the erection member 28 so as to be positioned in the center of the pair of moving machines 27. The under-road camera 26 captures images of the under-road area of ​​the existing bridge 50 while moving by the mobile robot 25 in the bridge axis direction, thereby acquiring under-road point cloud data within the imaging range. The under-road point cloud data is input to the design support device 21 by connecting the under-road camera 26 to the design support device 21. By capturing images of the under-road in this manner for the entire existing bridge 50, under-road point cloud data for the entire existing bridge 50 is obtained.

[0021] In the model creation step (step S203), a model generation process is executed by the design support device 21. In the model generation process, the design support device 21 combines the on-road point cloud data and the under-road point cloud data based on the orientation points included in each data, and creates CIM (Construction Information Modeling) data, which is 3D model data that reproduces the existing bridge 50.

[0022] In this way, by acquiring the on-road point cloud data and under-road point cloud data from which CIM data of the existing bridge 50 can be created using the above-mentioned method, it is possible to survey the existing bridge 50 without restricting the roads leading to the existing bridge 50. The on-road point cloud data acquisition process (step S201) and the under-road point cloud data acquisition process (step S202) may be performed in parallel, or the under-road point cloud data acquisition process (step S202) may be performed first.

[0023] (design process) The design process (step S102) is performed using the design support system 20. The design process is a process of designing a new deck slab to be installed on the existing girder 51 based on CIM data.

[0024] As shown in Figure 7, the design process begins with an allocation rule setting process (step S301). In the allocation rule setting process, the designer operates the design support device 21 to input various information. The designer basically sets the allocation rules so as to reduce the number of new deck slab types, that is, to reduce the number of new deck slabs with different shapes. The designer also sets the allocation rules for the basic design items of the new deck slab, such as the overall area where the new deck slab will be installed, the materials used, and the placement of rebar, as well as the fixed positions of splice plates and non-placement areas of the joints of the new deck slab.

[0025] Next, an allocation step (step S302) is performed. In the allocation step, an allocation process is executed by the design support device 21. The allocation process is started when the designer performs an allocation start operation on the design support device 21.

[0026] In the allocation process, the design support device 21 performs an allocation simulation based on the CIM data and the allocation rules, thereby allocating the deck slabs to be installed on the existing girders 51. The design support device 21 creates allocation draft data that shows the allocation draft that is the result of the allocation simulation. The allocation draft data is 3D model data that can display the state in which the deck slabs are installed on the existing girders 51.

[0027] As shown in Figure 8, the display device H13 of the design support device 21 displays a top view of the state in which the allocation deck 55 allocated by the allocation simulation is installed on the existing girder 51 as an allocation draft. The allocation deck 55 is also displayed in different colors according to its shape. In Figure 8, allocation decks 55a, 55b, 55c, and 55d with different shapes are allocated as the allocation deck 55, and the differences in color are indicated by different dots.

[0028] When the allocation step is completed, a division information input step is carried out (step S303). In the division information input step, the designer inputs the number of division constructions N and the division distance L as division information.

[0029] The number of divided constructions N is the number of divisions of the allocated deck 55 when partial deck replacement work is carried out by staggering the construction period, such as in the half-section deck replacement method. The number of divided constructions N is determined according to the traffic volume, number of lanes, and alternative routes in the vicinity.

[0030] As shown in Figure 9, when the number of divided construction works is N = 2, each allocated deck 55 in the allocation draft data is divided into divided deck slabs 551 and 552, and the deck replacement work is carried out. The designer inputs the division distance L as the position when dividing into divided deck slabs 551 and 552. The number of divided construction works N = 2 is input, for example, when deck replacement work is to be carried out for two lanes at a time on a bridge with two lanes on each side.

[0031] Furthermore, when the number of divisions for construction work is N=3, each allocated deck 55 in the draft allocation data is divided into divided deck 551, divided deck 552, and divided deck 553, and the deck replacement work is carried out. The designer inputs a first division distance L1 as the position when dividing into divided deck 551 and divided deck 552, and a second division distance L2 as the position when dividing into divided deck 552 and divided deck 553. The number of divisions for construction work N=3 is input, for example, when deck replacement work is to be carried out for two lanes at a time on a bridge with three lanes on each side.

[0032] When the division information input process is completed, the division process is carried out (step S304). In the division process, a division process is executed by the design support device 21. In the division process, the design support device 21 divides each allocated floor slab 55 of the allocation draft data based on the division information, and creates floor slab draft data based on the divided divided floor slabs 55n (n is an integer from 1 to N).

[0033] Specifically, as shown in Fig. 10, for example, when the number of divided construction works N=2 is set for the allocation draft data shown in Fig. 8, the design support device 21 creates floor slab draft data showing a floor slab draft in which each allocated floor slab 55 is divided into divided floor slabs 551, 552 based on the division distance L. Note that Fig. 10 shows a display example in which divided floor slab 551 is arranged side by side on the lower side and divided floor slab 552 is arranged side by side on the upper side.

[0034] When replacing a deck without using the half-section deck replacement method, the number of divisions N=1 is input in the division information input process (step S303). In this case, the design support device 21 skips the division process (step S304) and handles the allocation draft data as deck draft data. Hereinafter, when there is no need to distinguish between the allocation deck 55 and the division deck 55n, they will simply be referred to as the new deck.

[0035] Next, a checking process is carried out (step S305). In the checking process, the designer checks the deck draft. In checking the deck draft, the designer checks whether there are any problems with the deck draft based on the deck draft data. Specifically, the designer checks for interference between rebars between adjacent decks, interference between the deck and splice plates, and the positional relationship between the deck and the fixing hardware of the wall parapet.

[0036] For example, as shown in FIG. 11, the designer checks whether the haunch portion 58 of the allocation deck 55 is designed so as not to interfere with the fixing hardware 57 of the splice plate 56. If there are any problems (step S306: NO), the designer modifies the allocation rules and sets them again (step S301). Then, the allocation process (step S302), division information input process (step S303), division process (step S304), and check process (step S305) are performed. If there are no problems (step S306: YES), the design data creation process is performed (step S307), in which design data based on the deck draft is created.

[0037] In the design data creation process (step S307), the design support device 21 creates design data. The design data is created based on the deck draft data. The design data is data that specifies, in addition to 3D model data for each new deck, the identification information for each new deck, design coordinates indicating the installation position, materials to be used, the arrangement of rebar, and the shape and position of reference marks to be used when confirming the installation position, etc. Once the design data is created, the design support device 21 uploads the design data to the server 100 based on the sharing operation of the designer. The server 100 notifies the production support device 31 of the upload of the design data.

[0038] Creating design data in this way can significantly reduce the time required for the design process. Also, uploading the design data to the server 100 allows the design data to be shared between the designer and the manufacturer.

[0039] (Floor slab production process) The deck slab fabrication process (step S103) is performed using the fabrication support system 30. The deck slab fabrication process is a process in which a new deck slab is fabricated based on design data.

[0040] The manufacturer inputs production information for each new deck slab, such as progress status and materials used, into the production support device 31. The production support device 31 uploads the input production information to the server 100. A camera 32 (see FIG. 1) capable of capturing images of the production process may also be installed at the production site. This camera 32 is connected to the production support device 31. The production support device 31 uploads the image data captured by the camera 32 to the server 100 as needed. This allows the designer to access the server 100 using the design support device 21 and grasp the production information and the current situation at the production site.

[0041] The manufacturer uses a measuring device 33 (see Figure 1) such as a 3D scanner to perform three-dimensional measurements of each new deck slab after completion. The manufacturer inputs identification information for the new deck slab to be measured and measurement data showing the results of the three-dimensional measurement into the production support device 31. The production support device 31 creates quality record data that associates the identification information with a 3D model of the new deck slab based on the measurement data, as well as as-built errors that show the results of comparing the shape based on the design data with the shape based on the measurement data. The quality record data is data that can display as-built errors in a heat map. The production support device 31 uploads the created quality record data to the server 100. The server 100 notifies the design support device 21 of the upload of the quality record data. Identification information is written in a predetermined position on each completed new deck slab.

[0042] (Construction preparation process) The construction preparation process (step S104) is carried out using the design support system 20. In the construction preparation process, the designer uses the design support device 21 to access the server 100 and checks the quality of the new deck slab to be delivered to the construction site based on the quality record data.

[0043] As shown in Fig. 12, the design support device 21 displays a heat map of the new deck slabs based on the quality record data. Fig. 12 shows an example of a heat map display of a divided deck slab 551. Based on this display, the designer can check in advance for errors in the finished form of each new deck slab and deviations from standard values.

[0044] By displaying the as-built errors of the new deck slabs as a heat map, the designer can easily grasp the singular points of each new deck slab. Furthermore, if there are many new deck slabs with large as-built errors, the designer can check the work details using images captured by camera 32 as well as the production information of the new deck slabs, and provide quality improvement guidance to the producers.

[0045] As shown in Figure 13, after quality confirmation, the design support device 21 performs an as-built simulation using the quality record data of each new deck slab. In the as-built simulation, the design support device 21 sequentially installs a 3D model of the new deck slab based on the quality record data on the existing girder 51. Figure 13 illustrates an example in which divided deck slabs 551 are installed sequentially. Based on the results of the as-built simulation, the designer checks for interference with road accessories, cumulative errors during installation, correlation errors with adjacent new deck slabs, interference with adjacent structures, and the like. The designer also updates the design data by using the design support device 21 to perform a pre-construction correction simulation in which the design coordinates of the new deck slab are corrected based on the results of the as-built simulation.

[0046] In this way, by performing a finished product simulation based on quality record data, problems during construction caused by errors in finished product can be avoided in advance. Also, by knowing the quality of the new deck slab in advance, designers can provide guidance to the fabricators on quality improvements.

[0047] (Construction process) The construction process (step S105) is a process in which the contractor actually installs the new deck slabs in order. For example, if the number of divided constructions N=2, divided deck slab 551 is installed in order, and then divided deck slab 552 is installed in order. The contractor lifts the new deck slabs using a lifting device such as a crane, and installs each new deck slab in order at its respective installation location. The contractor installs the new deck slab while checking the position of the new deck slab being lifted using the construction support system 40. Note that the contractor refers to a person involved in the installation work of the new deck slab.

[0048] 14, the construction support system 40 includes a construction support device 41 and an imaging device 42. The construction support device 41 and the imaging device 42 are configured to be able to communicate with each other. The construction support device 41 is preferably a portable device that can be carried by the builder, and preferably includes at least a display device H13 that can be carried by the builder.

[0049] 14 shows a schematic example of on-site work when installing the dividing floor slab 551. During the construction process, the contractor installs the camera 42 so that the installation position of the dividing floor slab 551 is included in the imaging range. After installing the camera 42, the contractor inputs imaging coordinates indicating the position of the camera 42 into the construction support device 41. In addition, the contractor inputs identification information of the dividing floor slab 551 to be installed into the construction support device 41 based on the design data.

[0050] After inputting the imaging coordinates and identification information, the contractor starts capturing images using the imaging device 42 when the divided floor slab 551 being lifted is carried to the vicinity of the installation position. The imaging device 42 transmits the captured image data to the construction support device 41 as needed.

[0051] The construction support device 41 performs image processing on the image data transmitted by the imaging device 42, thereby acquiring the relative coordinates of the divided floor slab 551 relative to the imaging device 42, based on the reference marks 60 of the divided floor slab 551 contained in the image data. The construction support device 41 then acquires the current position coordinates of the divided floor slab 551 based on the relative coordinates and the imaging coordinates, and displays an image including the design coordinates and the current position coordinates on the display device H13. The display device H13 in FIG. 14 shows an example of how an image including the design coordinates and the current position coordinates is displayed. The construction support device 41 displays an image showing the current position coordinates in a horizontal coordinate system centered on the design coordinates. The builder adjusts the position of the divided floor slab 551 based on this image, and installs the divided floor slab 551.

[0052] After the dividing floor slab 551 is installed, when the contractor inputs that the installation is complete, the construction support device 41 transmits installation coordinates indicating the position where the dividing floor slab 551 is actually installed to the design support system 20. The design support device 21 stores the installation coordinates of the dividing floor slab 551 in the server 100 as installation coordinate data.

[0053] Once the installation coordinate data is saved, the design support device 21 performs a construction correction simulation to correct the design coordinates of the new deck slabs to be installed from the next time onwards, based on the installation coordinate data and design data. The builder installs the new deck slabs from the next time onwards based on the corrected design coordinates. In this way, the new deck slabs are installed in order.

[0054] Once all the new decks have been installed and the designer has entered the completion information, construction data is created by adding quality record data and installation coordinate data for each new deck to the design data. The construction data is submitted to the construction client upon completion of the work and is used for bridge maintenance and management.

[0055] The operation and effects of this embodiment will be described. (1) According to the above embodiment, the allocation slabs 55 are allocated to the existing girders 51 by an allocation simulation based on CIM data. Then, design data for the new slab is created based on the divided slabs 55n obtained by dividing the allocation slab 55 according to the number of divided constructions N. This reduces the time required to design the new slab, thereby shortening the construction period for the renewal work.

[0056] (2) According to the above embodiment, CIM data capable of reproducing the existing bridge 50 is created based on the road point cloud data acquired using the unmanned aerial vehicle 22 and the under-road point cloud data acquired using the mobile robot 25. This allows the existing bridge 50 to be surveyed without restricting the roads leading to the existing bridge 50, thereby shortening the construction period for the renewal work.

[0057] (3) According to the above embodiment, the designer can grasp in advance the finished shape error of the new deck slab produced by the manufacturer. As a result, problems caused by finished shape error are less likely to occur during actual construction, and the construction period for renewal work can be shortened.

[0058] (4) Furthermore, the design support device 21 displays the as-built errors of the new deck slabs as a heat map, allowing the designer to easily grasp the singular points of each new deck slab. This reduces the time required to consider how to deal with as-built errors.

[0059] (5) In the above embodiment, a simulation of the installation of a new deck slab on the existing girder 51 is performed based on the CIM data and the actual measurement data. This makes it possible to check with a high degree of reliability interference with road accessories, cumulative errors during installation, correlation errors with adjacent members, interference with adjacent structures, etc. Furthermore, new deck slabs that are difficult to install can be rebuilt before construction. As a result, problems caused by errors in the installation process during actual construction are even less likely to occur.

[0060] (6) In the above embodiment, the new deck slab is installed based on the design coordinates and current position coordinates displayed on the display device H13 of the construction support system 40. This reduces the time required to install the new deck slab and allows the new deck slab to be installed with high positional accuracy. In addition, the contractor does not need to approach the new deck slab during lifting to measure its position, which ensures the safety of the contractor.

[0061] (7) According to the above embodiment, the design coordinates of the new deck slab to be installed can be managed based on the installation coordinates of the new deck slab that has already been installed. As a result, problems are less likely to occur during actual construction.

[0062] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility. In the above embodiment, the adjustment of the installation position of the new deck slab is not limited to the method using the camera 42. For example, it may be performed based on the visual inspection of the builder.

[0063] In the above embodiment, the divided floor slabs 55n are installed after performing a finished form simulation. However, the present invention is not limited to this, and the divided floor slabs 55n may be installed without performing a finished form simulation.

[0064] In the above embodiment, the divided floor slabs 55n are displayed as a heat map based on actual measurement data. However, the actual measurement data is not limited to this, and it is sufficient if the shape of the divided floor slabs 55n can be grasped, and it is not necessarily required to display the heat map.

[0065] In the above embodiment, the road point cloud data was acquired using the road imaging device 23 mounted on the unmanned aerial vehicle 22. However, the present invention is not limited to this, and the road point cloud data may be acquired, for example, using an imaging device that is installed near the existing bridge 50 and is capable of capturing images of the road surface of the existing bridge 50. Furthermore, the road point cloud data may be acquired using a laser measuring device mounted on the unmanned aerial vehicle 22, or may be acquired using a laser measuring device installed near the existing bridge 50. Furthermore, the road point cloud data may be acquired based on the imaging results from the imaging device and the measurement results from the laser measuring device.

[0066] In the above embodiment, the under-road point cloud data was acquired using the under-road camera 26 mounted on the mobile robot 25. However, the under-road point cloud data may also be acquired using, for example, an imager mounted on an unmanned aerial vehicle. The under-road point cloud data may also be acquired using a laser measuring instrument mounted on an unmanned aerial vehicle, or may be acquired using a laser measuring instrument installed near the existing bridge 50. Furthermore, the under-road point cloud data may also be acquired based on the imaging results from the imager and the measurement results from the laser measuring instrument. [Explanation of symbols]

[0067] 10...support system, 20...design support system, 21...design support device, 22...unmanned aerial vehicle, 23...road camera, 25...mobile robot, 26...underroad camera, 27...mobile device, 28...erection member, 29...roller, 30...manufacturing support system, 31...manufacturing support device, 32...camera, 33...measuring instrument, 40...construction support system, 41...construction support device, 42...camera, 50...existing bridge, 51...existing girder, 52...bottom flange, 53...web, 55...allocated deck, 55n...divided deck, 56...splicing plate, 57...fixing hardware, 58...haunch portion, 60...reference mark, 100...server.

Claims

1. A bridge renewal method for renewing a bridge in which multiple decks are arranged side by side in the bridge axis direction, comprising: The support system for supporting the renewal of the bridge comprises: The deck layout is performed using a layout simulation based on a 3D model of the existing bridge and layout rules. Create layout draft data that can display the state in which the allocated deck slab is installed on the existing girder, Based on the divided floor slabs obtained by dividing the allocated floor slabs according to the number of divisions and the division distance indicating the position when dividing, floor slab draft data is created that can display the divided floor slabs together with the allocated floor slabs, Create design data for the new deck based on the deck draft data. Bridge renewal methods.

2. The support system comprises: Acquire road point cloud data of the existing bridge and under-road point cloud data of the existing bridge, The road point cloud data and the under-road point cloud data are combined to create a 3D model of the existing bridge. The bridge renewal method according to claim 1.

3. Before the divided floor slabs manufactured based on the design data are delivered to the construction site, the support system acquires actual measurement data obtained by three-dimensionally measuring the manufactured divided floor slabs. The bridge renewal method according to claim 1.

4. The support system displays a heat map of the manufactured divided floor slab based on the actual measurement data. The bridge renewal method according to claim 3.

5. The support system performs a simulation of the finished product of installing the manufactured divided deck slab on the existing girder based on the 3D model and the actual measurement data. The bridge renewal method according to claim 4.

6. A plurality of reference marks are provided on the divided floor slab, The design data includes design coordinates indicating the installation positions of the divided floor slabs, The support system comprises: Acquire installation coordinates of the installed divided deck based on image data of the plurality of reference marks provided on the divided deck actually installed on the existing girder, Based on the installation coordinates, a correction simulation is performed to correct the design coordinates of the subsequent divided floor slabs. A bridge renewal method according to any one of claims 1 to 5.

7. A support system that supports the renewal of a bridge in which multiple decks are installed side by side in the bridge axis direction, The deck layout is performed using a layout simulation based on a 3D model of the existing bridge and layout rules. Create layout draft data that can display the state in which the allocated deck slab is installed on the existing girder, Based on the divided floor slabs obtained by dividing the allocated floor slabs according to the number of divisions and the division distance indicating the position when dividing, floor slab draft data is created that can display the divided floor slabs together with the allocated floor slabs, Create design data for the new deck based on the deck draft data. Support system.

Images