JP7679013B2 - Bridge renewal method and support system - Google Patents

Description

The present invention relates to a bridge renewal method and support system.

Renovation work is being carried out to renovate an existing bridge. In renovation work, for example, as in Patent Document 1, decks arranged in parallel in the bridge axis direction are replaced. Specifically, first, scaffolding is assembled around the bridge, and the bridge is surveyed using the scaffolding. Then, based on the survey results and the completion drawings created at the time of construction, the differences between the current bridge and the completion drawings are identified. Next, the designer designs the new deck by allocating the new deck to be actually installed based on the completion drawings, the differences between the current bridge and the completion drawings, and the allocation rules. The new deck is manufactured based on the designer's design and then transported to the construction site. At the construction site, the existing deck is removed to expose the existing girders, and then the new deck that was transported is installed.

JP 2021-085172 A

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 demand to shorten the construction period for bridge renovation work, including the period of traffic restrictions.

The bridge renewal method that solves the above problem 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 acquires on-road point cloud data and under-road point cloud data of the existing bridge, synthesizes the on-road point cloud data and the under-road point cloud data to create a 3D model of the existing bridge, allocates new decks by an allocation simulation based on the 3D model and allocation rules, and creates design data for the new deck.

This invention makes it possible to shorten the construction period for bridge renovation work.

1 is a flowchart showing the flow of an embodiment of a bridge renewal method. FIG. 1 is a diagram showing a schematic configuration of an embodiment of a support system. FIG. 2 is a diagram illustrating an example of a hardware configuration of an information processing device. 1 is a flowchart showing a flow of a design preparation process. FIG. 2 is a diagram illustrating an example of a method for acquiring road point cloud data. FIG. 2 is a diagram illustrating an example of a method for acquiring under-road point cloud data. 1 is a flowchart showing the flow of a design process. FIG. 2 is a diagram showing a typical example of a layout outline; FIG. 13 is a diagram illustrating one of the check items of a rough allocation plan. FIG. 13 is a diagram illustrating an example of a heat map for a newly constructed deck. FIG. 13 is a diagram showing a schematic diagram of a completed form simulation. FIG. 1 is a diagram showing a schematic diagram of on-site work using a construction support system. 1 is a flowchart showing a flow of a construction simulation. In a construction simulation, (a) is a diagram showing a schematic example of a state after the existing deck has been removed, (b) is a diagram showing an example of a state after a new deck has been installed, and (c) is a diagram showing another example of a state after the existing deck has been removed.

One embodiment of a bridge renewal method and its support system will be described with reference to Figures 1 to 12. Note that in this embodiment, a case where an existing deck is replaced in renewal work will be described.

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).

As shown in FIG. 2, the support system 10 for supporting the 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 a designer who designs the renewal work. The design support system 20 includes a design support device 21. The production support system 30 is a system used by a manufacturer who produces the replacement object such as a deck slab. The production support system 30 includes a production support device 31. The construction support system 40 is a system used by a contractor who performs the renewal work. The construction support system 40 includes a 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.

As shown in FIG. 3, each of the support devices (21, 31, 41) and the server 100 is configured with an information processing device H10 as its core.
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.

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 accepts 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 ROM, RAM, and a hard disk.

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

Processor H15 is not limited to performing software processing for all of the processes it executes. For example, processor H15 may be equipped with a dedicated hardware circuit (e.g., an application specific integrated circuit: ASIC) that performs hardware processing for at least some of the processes it executes. That is, processor H15 may be configured as follows:

(1) One or more processors that operate according to a computer program (software); (2) One or more dedicated hardware circuits that perform at least some of the various processes; or (3) A circuit that includes a combination of these.
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 execute processes. Memory, i.e., computer-readable media, includes any available media that can be accessed by a general-purpose or special-purpose computer.

(Design preparation process)
The design preparation process (step S101) is performed using the design support system 20. The design preparation process is a process in which an existing bridge is imaged 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 obtained by image-capturing the existing bridge from above, and under-road point cloud data obtained by image-capturing the existing bridge from below. Each location on the existing bridge is provided with a control point that serves as a reference when combining the on-road point cloud data and the under-road point cloud data.

As shown in FIG. 4, the design preparation process includes a 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).

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.

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 the existing bridge 50 from a 45 degree diagonal and a 60 degree diagonal with respect to a predetermined reference point of the existing bridge 50 so that traffic is not hindered 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 above the existing bridge 50 with the unmanned aerial vehicle 22. 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.

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 by the lower flanges 52 of a pair of existing girders 51 adjacent to each other in a direction 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 in the bridge axis direction by the rollers 29 arranged to sandwich the web 53 on the lower flanges 52 of each existing girder 51 rolling. 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 acquires under-road point cloud data of the imaging range by imaging the under-road of the existing bridge 50 while moving in the bridge axis direction by the mobile robot 25. 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.

In the model creation process (step S203), the design support device 21 executes a model generation process. In the model generation process, the design support device 21 synthesizes the 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.

In this way, by acquiring the above-mentioned method the road point cloud data and under-road point cloud data from which CIM data of the existing bridge 50 can be created, the existing bridge 50 can be surveyed without restricting the roads leading to the existing bridge 50. The 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.

(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.

As shown in FIG. 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 types of new deck slabs, i.e., 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 the splice plates and non-placement areas of the joints of the new deck slab.

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

In the allocation process, the design support device 21 allocates the new deck slab to be installed on the existing girder 51 by performing an allocation simulation based on the CIM data and the allocation rules. 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 new deck slab is installed on the existing girder 51.

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 new deck 55 is installed on the existing girder 51 as a layout draft. The new deck 55 is also displayed in different colors according to its shape. In Figure 8, new deck slabs 55a, 55b, 55c, and 55d of different shapes are assigned as the new deck slabs 55, and the differences in color are indicated by different dots.

When the allocation process is completed, a check process is carried out (step S303). In the check process, the designer checks the allocation draft. In checking the allocation draft, the designer checks whether there are any problems with the allocation draft based on the allocation draft data (step S304). Specifically, the designer checks the rebar interference between adjacent deck slabs, the interference between the deck slabs and the splice plates, the positional relationship between the deck slabs and the fixed metal fittings of the wall parapet, etc.

For example, as shown in FIG. 9, the designer checks whether or not the haunch portion 58 of the new deck 55 is designed so as not to interfere with the fixing hardware 57 of the splice plate 56 .
If there is a problem (step S304: NO), the designer modifies and resets the allocation rule (step S301), and then causes the design support device 21 to execute the allocation process again (step S302). If there is no problem (step S304: YES), a design data creation process is performed in which design data based on the allocation draft is created (step S305).

In the design data creation process (step S305), the design support device 21 creates design data. The design data is created based on the layout draft data. In addition to 3D model data for each new deck, the design data specifies the identification information for each new deck, the design coordinates indicating the installation position, the materials used, the arrangement of rebar, and the shape and position of reference marks used when checking the installation position. 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.

By creating design data in this way, the time required for the design process can be significantly reduced. In addition, by uploading the design data to the server 100, it becomes possible to share the design data between the designer and the manufacturer.

(Floor slab production process)
The deck slab manufacturing process (step S103) is performed using the manufacturing support system 30. The deck slab manufacturing process is a process in which a new deck slab is manufactured based on design data.

The manufacturer inputs production information for each new deck, 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. In addition, a camera 32 (see FIG. 1) capable of capturing images of the production process may 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.

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 the identification information of the new deck slab to be measured and actual measurement data showing the results of the three-dimensional measurement to 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 actual measurement data, as well as as-built errors showing the results of comparing the shape based on the design data with the shape based on the actual 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 at a specified position on each completed new deck slab.

(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.

As shown in FIG. 10, the design support device 21 displays the new deck 55 in a heat map based on the quality record data. Based on this display, the designer checks in advance the finished form error and deviation from the standard value of each new deck 55.

By displaying the as-built errors of the new decks in a heat map, the designer can easily grasp the singular points of each new deck. Furthermore, in cases where there are many new decks with large as-built errors, the designer can provide guidance to the producer on quality improvement by checking the work content using images captured by the camera 32 as well as the production information of the new decks.

As shown in FIG. 11, after quality confirmation, the design support device 21 performs a finished form simulation using the quality record data of each new deck slab. In the finished form simulation, the design support device 21 installs a 3D model of the new deck slab 55 based on the quality record data on the existing girder 51 in order. Based on the results of the finished form simulation, the designer checks for interference with road accessories, cumulative errors during installation, correlation errors with adjacent new deck slabs 55, interference with adjacent structures, and the like. The designer also uses the design support device 21 to perform a pre-construction correction simulation to correct the design coordinates of the new deck slab based on the results of the finished form simulation, thereby updating the design data.

In this way, by performing a finished product simulation based on quality record data, problems during construction caused by errors in the finished product can be avoided in advance. In addition, by knowing the quality of the newly constructed deck in advance, the designer can provide guidance to the manufacturer on quality improvements, etc.

(Construction process)
The construction process (step S105) is a process in which the contractor actually installs the new deck slabs in order. The contractor lifts the new deck slabs with a lifting device such as a crane, and installs each new deck slab in order at its respective installation position. The contractor installs the new deck slab while checking the position of the new deck slab being lifted using the construction support system 40. The contractor refers to a person involved in the installation work of the new deck slab.

As shown in FIG. 12, the construction support system 40 includes a construction support device 41 and an image capture device 42. The construction support device 41 and the image capture device 42 are configured to be capable of communicating 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.

During the construction process, the contractor installs the camera 42 so that the installation position of the new deck 55 is included in the imaging range. After installing the camera 42, the contractor inputs imaging coordinates indicating the position of the camera 42 to the construction support device 41. The contractor also inputs identification information for the new deck 55 to be installed to the construction support device 41 based on the design data.

After inputting the imaging coordinates and identification information, the contractor starts imaging with the imaging device 42 when the new deck slab 55 being lifted is carried close to the installation position. The imaging device 42 transmits the captured image data to the construction support device 41 as needed.

The construction support device 41 processes the image data transmitted by the imaging device 42, and acquires the relative coordinates of the new slab 55 relative to the imaging device 42 based on the reference mark 60 of the new slab 55 contained in the image data. The construction support device 41 then acquires the current position coordinates of the new slab 55 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. 12 shows an example of the display of an image including the design coordinates and the current position coordinates. 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 new slab 55 based on this image, and installs the new slab 55.

After the new deck 55 is installed, when the contractor inputs that the installation is complete, the construction support device 41 transmits installation coordinates indicating the actual location where the new deck 55 is installed to the design support system 20. The design support device 21 stores the installation coordinates of the new deck 55 in the server 100 as installation coordinate data.

When 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 slab 55 to be installed from the next time onwards, based on the installation coordinate data and the design data. The contractor installs the new deck slab 55 from the next time onwards, based on the corrected design coordinates. In this way, the new deck slabs 55 are installed in order.

Once all the new decks 55 have been installed and the designer has input the completion information, construction data is created by adding quality record data and installation coordinate data for each new deck 55 to the design data. The construction data is submitted to the construction client upon completion of the work and is used for maintaining and managing the bridge.

The operation and effects of this embodiment will be described.
(1) 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 makes it possible to survey the existing bridge 50 without restricting the roads leading to the existing bridge 50, thereby shortening the construction period for the renewal work.

(2) According to the above embodiment, the new deck 55 is allocated to the existing girder 51 by an allocation simulation based on the CIM data. This reduces the time required to design the new deck 55, thereby shortening the construction period of the renewal work.

(3) According to the above embodiment, the designer can grasp the shape error of the new deck slab 55 produced by the manufacturer in advance. As a result, defects caused by shape errors during actual construction are less likely to occur, and the construction period for the renewal work can be shortened.

(4) In addition, the design support device 21 displays the as-built errors of the new deck slabs 55 in a heat map, allowing the designer to easily grasp the singular points of each new deck slab 55. This can reduce the time required to consider how to deal with as-built errors.

(5) In the above embodiment, a simulation of the new deck 55 being installed 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 confidence the interference with road accessories, the accumulated error during installation, the correlation error with adjacent members, the interference with adjacent structures, etc. Furthermore, for new decks 55 that are difficult to install, they can be rebuilt before construction. As a result, problems caused by errors in the finished form during actual construction are even less likely to occur.

(6) In the above embodiment, the new deck 55 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 55 and allows the new deck 55 to be installed with high positional accuracy. In addition, the contractor does not need to approach the new deck 55 during lifting to measure its position, so the safety of the contractor can be ensured.

(7) According to the above embodiment, it is possible to manage the coordinates of the design coordinates of the new deck 55 to be installed based on the installation coordinates of the new deck 55 that has already been installed. As a result, problems are even less likely to occur during actual construction.

This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.
In the above embodiment, the bridge renewal method and support system have been described using the renewal of a deck. However, the bridge renewal method and support system may be applied to a renewal target component that is the subject of renewal, such as a wall parapet that is installed along the edge of a deck.

In the above embodiment, the adjustment of the installation position of the new deck 55 is not limited to the method using the imaging device 42. For example, the adjustment may be performed based on visual inspection by a contractor.
In the above embodiment, the as-built simulation is performed before the new deck 55 is installed. However, the present invention is not limited to this, and the new deck 55 may be installed without performing the as-built simulation.

- In the above embodiment, the new deck 55 is displayed as a heat map based on actual measurement data. However, the actual measurement data is not limited to this and may be any data that allows the shape of the new deck 55 to be understood, and does not necessarily have to be displayed as a heat map.

- In the above embodiment, the road point cloud data was acquired using the road imaging device 23 mounted on the unmanned aerial vehicle 22. Without being limited to this, the road point cloud data may be acquired, for example, using an imaging device that is installed near the existing bridge 50 and capable of imaging the road surface of the existing bridge 50. The road point cloud data may also be acquired using a laser measuring instrument mounted on the unmanned aerial vehicle 22, or may be acquired using a laser measuring instrument installed near the existing bridge 50. Furthermore, the road point cloud data may be acquired based on the imaging results by the imaging device and the measurement results by the laser measuring instrument.

- In the above embodiment, the under-road point cloud data was acquired using the under-road imaging device 26 mounted on the mobile robot 25. Without being limited to this, the under-road point cloud data may be acquired, for example, using an imaging device mounted on an unmanned aerial vehicle. The under-road point cloud data may also be acquired using a laser measuring instrument mounted on the 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 be acquired based on the imaging results by the imaging device and the measurement results by the laser measuring instrument.

- In the above embodiment, a construction simulation may be performed for the renewal work using CIM data and design data. The construction simulation visualizes the construction procedure of the renewal work in a 3D model by adding a time axis to the 3D model. The construction simulation is used, for example, when a designer decides on a construction plan proposal.

Various processes related to the construction simulation are performed by the server 100. The server 100 executes various processes related to the construction simulation by performing a specified operation on the design support device 21 being accessed. In this process, the server 100 provides an input screen for inputting various information, including the start of the construction simulation, to the design support device 21 being accessed.

As shown in FIG. 13, as processes related to the construction simulation, the server 100 executes a rule registration process (step S401), a model data input process (step S402), a construction step data creation process (step S403), and a reproduction process (step S404).

The rule registration process (step S401) is a process for registering construction procedure rules. The construction procedure rules are registered by the designer. The server 100 provides the design support device 21 with a rule registration screen for registering the construction procedure rules when a predetermined operation is performed on the design support device 21 that is accessing the server 100. The designer inputs the construction procedure rules into the rule registration screen using the design support device 21.

As construction procedure rules, the designer inputs rules related to the construction cycle. The rules related to the construction cycle stipulate the number of existing decks to be removed and the removal work period in one cycle, and the number of new decks 55 to be installed and the installation work period, with the removal of the existing deck and the installation of the new deck 55 being considered as one cycle of construction. In addition, for example, the designer inputs the start date and time, start direction, etc. as construction procedure rules.

It is preferable that the server 100 stores the input construction procedure rules in a readable manner. This allows the designer to create new construction procedure rules by modifying part of the construction procedure rules based on similar renewal work.

The model data input process (step S402) is a process that is executed when CIM data or design data is uploaded from the design support device 21 to the server 100. The server 100 provides a data input screen to the design support device 21 when a specified operation is performed on the design support device 21 that is accessing the server 100. The designer uploads the CIM data or design data to the server 100 using the data input screen accessed by the design support device 21. The server 100 stores the various uploaded data in a specified recording area.

The construction step data creation process (step S403) is a process for creating construction step data based on the construction procedure rules, CIM data, and design data. In the construction step data creation process, the server 100 creates data that specifies identification information, start date and time, end date and time, etc., for each 3D model to be constructed based on the construction procedure rules, CIM data, and design data, as construction step data.

The playback process (step S404) is a process of playing back the construction procedure in a 3D model based on the CIM data, design data, and construction step data. The server 100 executes the playback process when a playback operation is performed in the design support device 21 that is accessing the server 100.

In the reproduction process, the server 100 displays or hides the 3D model represented by the CIM data or design data based on the construction step data.
For example, in the reproduction process, the server 100 hides the existing floor slab 65 as shown in Fig. 14(a), and then displays the new floor slab 55 in the space vacated by hiding the existing floor slab 65 as shown in Fig. 14(b). After that, the server 100 hides the existing floor slab 65 adjacent to the new floor slab 55 as shown in Fig. 14(c).

In this way, in the regeneration process, the existing deck 65 is hidden and the new deck 55 is displayed as time passes, thereby visualizing the construction procedure of the renewal work with a 3D model. In the regeneration process, a 3D model of the lifting device used to remove the existing deck 65 and install the new deck 55 may also be displayed. The designer determines the construction plan based on the results of this construction simulation.

It is preferable that the construction simulation be performed by an information processing device that can access the server 100, such as the production support device 31 or the construction support device 41. With this configuration, the designer can use his or her own information processing device, for example, when explaining the proposed construction plan to the construction client.

10...Support system, 20...Design support system, 21...Design support device, 22...Unmanned aerial vehicle, 23...Roadside camera, 25...Mobile robot, 26...Underground camera, 27...Mobile device, 28...Installation 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...Image capture device, 50...Existing bridge, 51...Existing girder, 52...Lower flange, 53...Web, 55...New deck, 56...Splicing plate, 57...Fixed metal fitting, 58...Haunch, 60...Reference mark, 65...Existing deck, 100...Server.

Claims (7)

A bridge renewal method for renovating a bridge having a plurality of decks arranged in parallel in the bridge axis direction, comprising the steps of:
The support system for supporting the renewal of the bridge comprises:
Acquire road point cloud data of an existing bridge and road point cloud data of the existing bridge,
A 3D model of the existing bridge is created by combining the road point cloud data and the under-road point cloud data;
A bridge renewal method comprising: allocating a new deck slab through an allocation simulation based on a 3D model of the existing bridge and an allocation rule; and creating design data for the new deck slab. The bridge renewal method according to claim 1, wherein the support system acquires actual measurement data obtained by three-dimensionally measuring the newly constructed deck manufactured based on the design data before the newly constructed deck is transported to a construction site. The bridge renewal method according to claim 2 , wherein the support system displays a heat map of the newly constructed deck based on the actual measurement data. The bridge renewal method according to claim 2, wherein the support system performs a completed form simulation of installing the manufactured new deck slab on the existing girder based on the 3D model of the existing bridge and the actual measurement data. The new deck is provided with a plurality of reference marks,
The design data includes design coordinates indicating the installation position of the new deck,
The support system comprises:
Acquire installation coordinates of the newly installed deck based on image data obtained by capturing an image of the plurality of reference marks provided on the newly installed deck that has actually been installed on the existing girder;
The bridge renewal method according to any one of claims 1 to 4, further comprising performing a correction simulation to correct the design coordinates of a subsequent new deck based on the installation coordinates. The design data includes a 3D model of the new deck,
The bridge renewal method according to claim 1 , wherein the support system performs a construction simulation for replacing the deck using a 3D model of the existing bridge and a 3D model of the new deck. A support system for supporting the renewal of a bridge in which multiple decks are installed side by side in the bridge axis direction,
Acquire road point cloud data of an existing bridge and road point cloud data of the existing bridge,
A 3D model of the existing bridge is created by combining the road point cloud data and the under-road point cloud data;
A support system that allocates a new deck slab through an allocation simulation based on the 3D model of the existing bridge and allocation rules, and creates design data for the new deck slab.

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