Shape measurement method, shape measurement device, measurement method of sheet pile, measurement terminal, production method of sheet pile, and quality management method of sheet pile

Abstract

To provide a shape measurement method that allows connection confirmation for sheet piles to be carried more simply regardless of a state of the sheet piles.SOLUTION: A shape measurement method for analyzing an interference level showing an interference degree between joints of sheet piles for a set of the sheet piles having a joint connecting the sheet piles to each other comprises: a connection completion state setting step of setting a connection completion state where connection between a pre-placed sheet pile and a post-placed sheet pile is completed, on a basis of data of each of shapes of the pre-placed sheet pile and the post-places sheet pile; and an interference analyzing step of analyzing the interference level between the joints of the sheet piles in the connection completion state.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a shape measurement method, a shape measurement device, a sheet pile measurement method, a sheet pile measurement system, a measurement terminal, a sheet pile manufacturing method, and a sheet pile quality control method for a sheet pile having joints that connect the sheet piles together. [Background technology]

[0002] Generally, sheet piles are used as retaining walls to hold back soil and create space, and are widely used in construction projects such as railways, roads, and buildings. Sheet piles are becoming larger and longer in size in order to accommodate the increasing scale of structures and to improve work efficiency.

[0003] The sheet piles are fitted with joints to connect them together, and the wall is constructed to form an earth retaining wall by connecting the joints. The joints have clearances for connection, but the clearances are set small to ensure the rigidity and watertightness of the joints.

[0004] The construction of sheet piles is completed by penetrating the first sheet pile into the ground by striking, vibrating, pressing, etc., and then repeating the same process to insert the second sheet pile, ensuring that the joints between the sheet piles are connected, and constructing the retaining wall. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-201633 Summary of the Invention [Problem to be solved by the invention]

[0006] Whether or not sheet piles can be connected depends on the shape of the joints that connect them, so it is necessary to check the connection before use. However, when the sheet piles are large, long, or heavy, made of metal materials such as steel, it becomes difficult to check the connection. In this case, there are problems such as the significant effort required to check the connection, damage to the joints themselves, and concerns about ensuring safety.

[0007] In particular, sheet piles can be as long as about 15 meters, and there is a possibility that a position where the joints interfere due to bending of the sheet pile 10 or deformation of the joint 11 exists between the connection start position where the sheet piles begin to be inserted into the joints connecting the sheet piles and the connection completion position where the sheet piles are completely connected. If a position where the joints interfere exists, there is a possibility that the joint connection process will be interrupted. Therefore, there has been a need for a technology that can more easily determine whether the joint shape of a sheet pile is suitable for connection before use on site, regardless of the state of the sheet piles.

[0008] The present invention has been made in consideration of the above, and its purpose is to provide a shape measurement method, a shape measurement device, a sheet pile measurement method, a sheet pile measurement system, a measurement terminal, a sheet pile manufacturing method, and a sheet pile quality control method that allow connection confirmation of sheet piles to be performed more easily regardless of the condition of the sheet piles. [Means for solving the problem]

[0009] (1) In order to solve the above-mentioned problems and achieve the above-mentioned object, a shape measurement method according to one embodiment of the present invention is a shape measurement method for analyzing an interference level indicating the degree of interference between the joints of a set of sheet piles having joints connecting the sheet piles to each other, and includes a connection completion state setting step for setting a connection completion state in which the connection between the previously placed sheet pile and the next placed sheet pile is completed based on data on the shapes of the previously placed sheet pile and the next placed sheet pile, and an interference analysis step for analyzing the interference level between the joints of the sheet piles in the connection completion state.

[0010] (2) A shape measurement method according to one aspect of the present invention, in the invention described in (1), includes at least one of the following steps: a step of determining whether the set of sheet piles passes or fails based on the interference level measured in the interference analysis step; and an interference information assignment step of assigning information about the interference part to a part determined to be an interference part based on the interference level measured in the interference analysis step.

[0011] (3) A method for measuring sheet piles according to one embodiment of the present invention includes a shape measurement process for measuring the shapes of a previously placed sheet pile and a next placed sheet pile for a set of sheet piles having joints connecting the sheet piles to each other, and a shape measurement process for analyzing the interference level for each set of sheet piles based on the shape data measured in the shape measurement process using the shape measurement method according to the invention described in (1) or (2) above.

[0012] (4) A method for manufacturing a sheet pile according to one embodiment of the present invention is a method for manufacturing a set of sheet piles having joints that connect the sheet piles together, and includes a sheet pile manufacturing process for manufacturing the sheet piles, and a shape measurement process for performing the sheet pile measurement method according to the invention described in (3) above on the set of sheet piles having joints manufactured by the sheet pile manufacturing process.

[0013] (5) A quality control method for sheet piles according to one embodiment of the present invention is a quality control method for sheet piles that controls the quality of a set of sheet piles having joints that connect the sheet piles to each other, and includes a sheet pile manufacturing process for manufacturing the sheet piles, a shape measurement process for measuring the shape of the set of sheet piles manufactured by the sheet pile manufacturing process using the sheet pile measurement method according to the invention described in (3) above, and a quality control process for controlling the quality of the manufactured sheet piles using the results obtained from the shape measurement process.

[0014] (6) A shape measuring device according to one embodiment of the present invention is a shape measuring device that analyzes the interference level between the joints of a set of sheet piles having joints that connect the sheet piles to each other, and is equipped with a control unit that executes a connection completion state setting process that sets a connection completion state in which the connection between the sheet piles is complete based on data on the shapes of the previously placed sheet pile and the next placed sheet pile, and an interference analysis process that analyzes the interference level between the joints of the sheet piles in the connection completion state.

[0015] (7) A shape measuring device according to one embodiment of the present invention, in the invention described in (6) above, further includes a communication unit, and the communication unit executes, via the control unit, at least one of the following processes: acquiring data on the shapes of the previously placed sheet pile and the next placed sheet pile; and outputting information on the interference level obtained by the interference analysis process.

[0016] (8) A sheet pile measurement system according to one embodiment of the present invention comprises a measurement unit configured to be able to measure the shapes of a previously placed sheet pile and a subsequently placed sheet pile for a set of sheet piles having joints connecting the sheet piles to each other, and a shape measurement device according to the invention described in (6) or (7) above, which analyzes the interference level for each set of sheet piles based on the shape data measured by the measurement unit.

[0017] (9) A measuring terminal according to one embodiment of the present invention is a measuring terminal configured to be capable of analyzing the interference level between joints of sheet piles for a set of sheet piles having joints connecting the sheet piles to each other, and is controlled by a control unit, and comprises: a measuring unit that measures the shapes of the previously placed sheet pile and the next placed sheet pile under the control of the control unit; a communication unit that executes at least one of the following processes: an output process that outputs the measured shapes as data to a shape measuring device according to the invention described in (6) or (7) above under the control of the control unit; and an acquisition process that acquires information regarding the interference level for each set of sheet piles from the shape measuring device; and an output unit that is capable of outputting the acquired information in a predetermined format under the control of the control unit.

[0018] (10) In one embodiment of the measuring terminal of the present invention, in the invention described in (9) above, the control unit performs at least one of the following processes: a process for determining whether the set of sheet piles passes or fails based on the acquired information regarding the interference level and a predetermined criterion; and an interference information assignment process for assigning information about the interference part to a part determined to be an interference part based on the acquired information regarding the interference level and a predetermined criterion.

[0019] (11) The sheet pile measurement system of the present invention comprises a measurement terminal according to the invention described in (9) or (10) above, and a shape measurement device according to the invention described in (6) or (7) above, which analyzes the interference level for each set of sheet piles based on shape data measured by the measurement terminal.

[0020] (12) A quality control method for sheet piles according to one embodiment of the present invention is a quality control method for sheet piles that controls the quality of a set of sheet piles having joints that connect the sheet piles together, and controls the quality of the set of sheet piles using information on the interference level obtained from an interference analysis process executed by the control unit of a shape measuring device according to the invention described in (6) or (7) above. [Effects of the Invention]

[0021] The shape measurement method, shape measurement device, sheet pile measurement method, sheet pile measurement system, measurement terminal, sheet pile manufacturing method, and sheet pile quality control method of the present invention make it possible to more easily confirm the connection of sheet piles regardless of the condition of the sheet piles. [Brief explanation of the drawings]

[0022] [Figure 1A] FIG. 1A is a diagram showing a sheet pile to be measured in a sheet pile measurement system according to an embodiment of the present invention. [Figure 1B] FIG. 1B is a view taken along the arrow B in FIG. 1A. [Figure 2] FIG. 2 is a diagram showing a state in which the sheet pile to be measured has been connected in the sheet pile measurement system according to one embodiment of the present invention. [Figure 3] FIG. 3 is a block diagram showing a sheet pile measurement system according to a first example of an embodiment of the present invention. [Figure 4] FIG. 4 is a block diagram showing a sheet pile measurement system according to a second embodiment of the present invention. [Figure 5] FIG. 5 is a flowchart for explaining a method for measuring a sheet pile according to one embodiment of the present invention. [Figure 6] FIG. 6 is a flowchart illustrating a shape measurement process according to an embodiment of the present invention. [Figure 7] FIG. 7 is a flowchart showing a method for setting a judgment start position according to an embodiment of the present invention. [Figure 8] FIG. 8 is a diagram for explaining the coordinates of the sheet pile in the shape measuring method according to one embodiment of the present invention. [Figure 9] FIG. 9 is a diagram for explaining the central plane of the sheet pile wall and the effective width per sheet pile in setting the determination start position according to one embodiment of the present invention. [Figure 10] FIG. 10 is a diagram for explaining the central plane of the sheet pile wall and the effective width per sheet pile in setting the determination start position according to another first example of the embodiment of the present invention. [Figure 11] FIG. 11 is a diagram for explaining the central plane of the sheet pile wall and the effective width per sheet pile in setting the determination start position according to another second example of the embodiment of the present invention. [Figure 12] FIG. 12 is a diagram for explaining the central plane of the sheet pile wall and the effective width per sheet pile in setting the determination start position according to another third example of the embodiment of the present invention. [Figure 13] FIG. 13 is an enlarged cross-sectional view showing a connecting portion of a sheet pile according to one embodiment of the present invention. [Figure 14] FIG. 14 is an enlarged cross-sectional view showing an interference portion in a connecting portion of a sheet pile according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all drawings of the following embodiments, the same or corresponding parts are designated by the same reference numerals. Furthermore, the present invention is not limited to the embodiments described below.

[0024] (Embodiment) First, we will explain the sheet piles that are the measurement target by the sheet pile measurement system of the embodiment of the present invention. Figure 1A is a diagram of the sheet pile that is the measurement target (measurement target) in the shape measurement system of this embodiment, and Figure 1B is a view taken from the arrow B in Figure 1A. Figure 2 is a diagram showing the completed connection of multiple sheet piles that are the measurement target in the shape measurement system of this embodiment.

[0025] (The sheet pile to be measured) As shown in Fig. 1A, the sheet pile 10 according to this embodiment has joints 11 that connect the sheet piles together. Also, as shown in Fig. 1B, the joints 11 are composed of claws 14, grooves 15, and openings 16. The joints 11 of the sheet piles 10 are connected together by determining the position of the first sheet pile 10, and then inserting the second sheet pile 10 along the longitudinal direction of the sheet pile 10 so as to connect it to the joints 11 of the other sheet pile 10.

[0026] The materials of the sheet piles 10 and the joints 11 are not particularly limited. Examples include steel, metal materials other than steel, concrete, resin, or a combination of multiple materials. The material of the sheet piles is selected depending on the purpose of use and the conditions of the pipes, which will be described later. This embodiment is particularly effective for sheet piles 10 that are large, long, or heavy, making it difficult to check the connection before shipping from the factory. Various shapes of the sheet piles 10 can be adopted, including U-shaped, hat-shaped, straight, steel pipe-shaped, and composite types combining multiple components, as long as the sheet piles 10 have joints 11 that connect multiple sheet piles 10 to each other. The shape, manufacturing method, and joint shape are not limited.

[0027] (First example of embodiment) Next, a sheet pile measurement system according to a first embodiment of the present invention will be described. Fig. 3 is a block diagram showing the sheet pile measurement system according to one embodiment.

[0028] As shown in Fig. 3, the sheet pile measurement system 1 is configured to have a shape measuring device 20 and a measuring unit 35. Furthermore, the shape measuring device 20 is connected to a sheet pile processing device 40. The sheet pile measurement system 1 may adopt a configuration that has the shape measuring device 20, the measuring unit 35, and the sheet pile processing device 40. Furthermore, the sheet pile measurement system 1 according to one embodiment is designed to use the shape measuring device 20 in a fixed position, but the measuring unit 35 and the shape measuring device 20 can be located close to each other or at a long distance.

[0029] (shape measuring device) The shape measuring device 20 includes a control unit 21, a storage unit 22, and an input / output unit 23. It is also possible to omit the input / output unit 23. The shape measuring device 20 can use a known computer, server, laptop computer, mobile terminal, tablet, smartphone, or a virtual device on a network such as a cloud.

[0030] The control unit 21 as a control means specifically includes a processor such as a CPU (Central Processing Unit), a DSP (Digital Signal Processor), an FPGA (Field-Programmable Gate Array) having hardware, and a main memory unit such as a RAM (Random Access Memory) or a ROM (Read Only Memory) (none of which are shown).

[0031] The storage unit 22, which serves as a storage means, is physically composed of a storage medium selected from the group consisting of volatile memory such as RAM, non-volatile memory such as ROM, erasable programmable read-only memory (EPROM), hard disk drive (HDD), solid state drive (SSD), and removable media. Removable media include, for example, a universal serial bus (USB) memory or a disc storage medium such as a compact disc (CD), a digital versatile disc (DVD), or a Blu-ray disc (BD). The storage unit 22 may also be configured using a computer-readable storage medium such as an externally attachable memory card. The storage unit 22 can store an operating system (OS), various programs, various tables, various databases, and the like for executing the operations of the shape measurement device 20. The various programs include learning models and neural networks. These various programs can also be recorded on computer-readable storage media such as a hard disk, flash memory, CD-ROM, DVD-ROM, and flexible disk for widespread distribution.

[0032] The storage unit 22 stores a shape database 221 and a board type database 222. The board type database 222 stores various information (board type information) related to the sheet piles 10 as basic information in a searchable manner. The board type information includes the identification ID of the sheet pile 10, specifications, and dimensional information such as the sheet pile height, the effective sheet pile width, and the joint shape. The shape database 221 stores searchable information related to the clearance between the joints of the connected sheet piles based on the board type information, and information on the measurement results of the interference level, which indicates the degree of interference between the joints of the connected sheet piles, measured by the measuring unit 35 described later (hereinafter, referred to as shape information). In addition to the information on the measurement results of the interference level, the shape information includes various information related to interference, such as flag information as information on the interference part that specifies the interference location, and pass / fail information (pass / fail) for the set of sheet piles 10.

[0033] The shape calculation unit 211 of the control unit 21 is configured to be able to store the joint shape of the sheet pile 10 measured by the measurement unit 35 as digital data in a shape database 221 of the storage unit 22. The storage unit 22 may be provided in a housing different from that of the control unit 21, and an external storage device or a virtual storage device such as a cloud on a network may be used.

[0034] In this embodiment, the control unit 21 loads a program stored in the storage unit 22 into a working area of ​​the main storage unit, executes the program, and controls each component unit through the execution of the program, thereby realizing functions that meet a predetermined purpose. Specifically, the control unit 21 can realize the functions of a shape calculation unit 211 and a determination unit 212 by executing the program.

[0035] The input / output unit 23 is composed of, for example, a touch panel display, a speaker / microphone, buttons, switches, a jog dial, etc. The input / output unit 23 as an output unit is configured to notify the outside of predetermined information by displaying characters, figures, etc. on the screen of a display such as a liquid crystal display, an organic EL display, or a plasma display, or by outputting sound from a speaker, under the control of the control unit 21. The input / output unit 23 includes a printer that outputs predetermined information by printing it on printing paper, etc. The various information stored in the memory unit 22 can be confirmed, for example, on a display of the input / output unit 23 installed in a predetermined office, etc.

[0036] The input / output unit 23 as an input unit may be configured, for example, as a keyboard, a touch-panel keyboard incorporated in the input / output unit 23 for detecting touch operations on a display panel, a voice input device for enabling external communication, a switch, or a jog dial. When a user visually observes the shape of the joints 11 of the sheet piles 10 using the input / output unit 23 as an output unit, the user can input measurement values ​​related to the shape of the joints 11 of the sheet piles 10 as shape information from the input / output unit 23 as input means. Furthermore, as will be described in detail later, the input / output unit 23 can also input a flag to set or clear it based on the presence or absence of interference between the joints 11 of the sheet piles 10. Specifically, the input / output unit 23 may input "0" if interference exists between the joints 11 of the sheet piles 10, and "1" if no interference exists.

[0037] (Measurement section) The measurement unit 35 is composed of at least one device, such as a handheld 3D scanner. The 3D scanner may be, for example, a laser irradiation device or an infrared irradiation device. Since handheld 3D scanners must be operated while maintaining a focal length (for example, 20 cm to 40 cm) appropriate for the model, it is desirable to secure a space of 50 cm or more around the object to be scanned.

[0038] From the perspective of determining whether the sheet piles 10 can be connected at the joints 11, the measurement accuracy of the measuring unit 35 is preferably less than half the size at which the desired interference level can be determined. The measurement accuracy is set according to the size of the sheet piles 10, the shape of the joints 11, and other factors, and is not limited to these values. In particular, since the sheet piles 10 have a three-dimensional shape, blind spots are likely to occur due to the presence of the claws 14, etc., so a handheld measuring device, such as a handheld 3D scanner, is desirable from the perspective of operability. High-precision handheld 3D scanners typically require markers for shape measurement to be attached to the target object approximately every 10 cm. However, for larger sheet piles 10, a markerless handheld 3D scanner, which does not require markers for shape measurement, is desirable from the perspective of efficiency.

[0039] Specifically, the sensor constituting the measurement unit 35 can measure the distance from the installation position to the top surface of an object, such as the sheet pile 10, by irradiating and reflecting a predetermined light, such as a laser beam. The measurement unit 35 can perform so-called sensing, which measures the distance from the measurement position to the surface of the object in association with two-dimensional position information. Sensing includes various measurements performed by the measurement unit 35. Examples of two-dimensional position information that can be used include coordinates (x, y) on the xy plane and coordinates (r, θ) at a distance r and a displacement angle θ. Based on distance information corresponding to the two-dimensional position information, the shape of the surface of the sheet pile 10 can be measured three-dimensionally.

[0040] Furthermore, when selecting the equipment for the measuring unit 35, the higher the resolution, the more preferable. In this case, the resolution should be sufficient to accurately reproduce the shape that affects the interference level used to determine whether the joints 11 of the sheet piles 10 can be connected. In this embodiment, since local irregularities are unlikely to occur in the shape of the sheet piles 10, the resolution should be approximately 1 mm or less, but is not limited to this value. Furthermore, in this embodiment, the feasibility of assembly is determined based on the scanned data, i.e., whether the claws 14 can be inserted into the grooves 15. Therefore, if the shapes of the claws 14 and grooves 15 of the joints 11 are similar, it is desirable to provide markers or shapes that can be recognized by scanning to make them easier to identify.

[0041] Furthermore, in the joint portion 11 of the sheet pile 10 according to this embodiment, there may be some locations that are difficult to measure with the measuring unit 35. In this case, taking into consideration that local unevenness is unlikely to occur, it is possible to employ a method of interpolating the shape based on the results obtained by measuring the locations that can be measured with the measuring unit 35 (hereinafter, measurable locations), or a method of determining whether or not interference exists using the clearance on the opposite side of a location where interference is predicted (hereinafter, predicted interference location). Here, if the clearance on the opposite side of the predicted interference location is equal to or less than a predetermined allowable value, it is determined that no interference has occurred at the predicted interference location, and if it is greater than the predetermined allowable value, it is determined that interference has occurred at the predicted interference location.

[0042] The measurement unit 35 outputs the measurement values ​​of the shape measured by sensing to the shape measuring device 20. The shape calculation unit 211 in the control unit 21 of the shape measuring device 20 stores the acquired measurement values ​​in the shape database 221 of the storage unit 22.

[0043] (Sheet pile processing equipment) The sheet pile processing device 40 is a device for performing an adjustment process on the sheet pile 10. The sheet pile processing device 40 includes a control unit 41, a memory unit 42, an input / output unit 43, and a steel sheet pile processing unit 45. The control unit 41, the memory unit 42, and the input / output unit 43 are functionally and physically configured in the same manner as the control unit 21, the memory unit 22, and the input / output unit 23, respectively. The sheet pile processing device 40 is connected to the shape measuring device 20.

[0044] The control unit 41 loads a program stored in the storage unit 42 into a working area of ​​the main storage unit, executes the program, and controls each component unit through the execution of the program, thereby realizing a function that meets a predetermined purpose. Specifically, the control unit 41 can realize the function of a machining control unit 411 through the execution of the program. The machining control unit 411 is configured to be able to control the steel sheet pile processing unit 45.

[0045] The shape calculation unit 211 of the shape measuring device 20 reads out shape information from the shape database 221 stored in the memory unit 22 and outputs it to the sheet pile processing device 40. After acquiring the shape information, the sheet pile processing device 40 stores the acquired shape information at least temporarily in the memory unit 42. When an instruction to correct an interfering portion of the joint portion 11 is input from an operator or the like via the input / output unit 43, the processing control unit 411 of the control unit 41 controls the steel sheet pile processing unit 45 to execute processing to correct the interfering portion based on the acquired shape information. The sheet pile processing device 40 may be configured integrally with the shape measuring device 20. Furthermore, the sheet pile processing device 40 can also manufacture the sheet pile 10. The sheet pile measurement system 1 according to the first example of the embodiment is configured as described above.

[0046] (Second example of embodiment) Next, a sheet pile measurement system according to a second embodiment of the present invention will be described. Fig. 4 is a block diagram showing the sheet pile measurement system according to the second embodiment. As shown in Fig. 4, the sheet pile measurement system 1A is configured to include a shape measurement device 20 and a measurement terminal 30A that can communicate with each other via a network 2.

[0047] The network 2 is, for example, a public communication network such as the Internet, and is made up of one or a combination of a LAN (Local Area Network), a WAN (Wide Area Network), a telephone communication network such as a mobile phone, a public line, a VPN (Virtual Private Network), a dedicated line, etc. The network 2 is an appropriate combination of wired communication and wireless communication.

[0048] The sheet pile measurement system 1A may further be connected to a sheet pile processing device 40 that can communicate with at least the shape measurement device 20 via the network 2. The sheet pile measurement system 1A may also adopt a configuration having the shape measurement device 20, the measurement terminal 30A, and the sheet pile processing device 40.

[0049] (shape measuring device) The shape measuring device 20A includes a control unit 21, a memory unit 22, an input / output unit 23, and a communication unit 24. The communication unit 24 as a communication means is, for example, a LAN (Local Area Network) interface board or a wireless communication circuit for wireless communication. The LAN interface board and the wireless communication circuit are connected to a network 2. The communication unit 24 is connected to the network 2 and communicates with the measurement terminal 30A and the sheet pile processing device 40A. The other configurations are the same as those of the shape measuring device 20 in the embodiment.

[0050] (measurement terminal) The measurement terminal 30A includes a control unit 31, a memory unit 32, an input / output unit 33, a communication unit 34, and a measurement unit 35. The control unit 31, the memory unit 32, the input / output unit 33, and the communication unit 34 have the same physical and functional configurations as the control unit 21, the memory unit 22, the input / output unit 23, and the communication unit 24 described above, respectively.

[0051] Furthermore, the measurement unit 35 in the measurement terminal 30A according to the second example of the embodiment is configured similarly to the measurement unit 35 in the first example of the embodiment. The control unit 31 can realize a function that meets a predetermined purpose by loading a program stored in the storage unit 32 into a working area of ​​the main storage unit and executing the program. Specifically, the control unit 31 can realize the function of a measurement control unit 311 by executing the program. The measurement control unit 311 is configured to be able to control the measurement unit 35.

[0052] (Sheet pile processing equipment) The sheet pile processing device 40A includes a control unit 41, a memory unit 42, an input / output unit 43, a communication unit 44, and a steel sheet pile processing unit 45. The communication unit 44 as a communication means is physically and functionally configured in the same manner as the communication unit 24 described above, and is connected to the network 2. The communication unit 44 is connected to the network 2 and communicates with at least the shape measuring device 20A. The other configurations are the same as those of the sheet pile processing device 40 in one embodiment. The sheet pile measurement system 1A according to the second example of the embodiment is configured as described above.

[0053] (Measuring method using a sheet pile measuring system) Next, a method for measuring the sheet pile 10 using the sheet pile measurement system 1 according to the first example of the embodiment or the sheet pile measurement system 1A according to the second example configured as described above will be described. Figure 5 is a flowchart showing a method for measuring the sheet pile 10 according to one embodiment.

[0054] (Sheet pile manufacturing process) As shown in Fig. 5, first, in step ST1, a sheet pile manufacturing process is performed by the sheet pile processing device 40. In step ST1, the sheet pile 10 is first manufactured by, for example, hot rolling. Note that the manufacturing method of the sheet pile 10 is not necessarily limited to hot rolling, and any manufacturing method, such as welding of connecting joints or 3D printer technology, can be adopted.

[0055] (Method of measuring sheet piles) Here, the measurement method of the sheet pile according to this embodiment will be described. In this embodiment, the method includes a shape measurement process for measuring the shape of the sheet pile after processing, and a clearance measurement process for the set of sheet piles based on the measured shape of the sheet pile. These shape measurement process and clearance measurement process are performed before the sheet pile 10 is actually used.

[0056] (shape measurement process) That is, after the sheet pile manufacturing process in step ST1 is performed, the process proceeds to step ST2 to perform the shape measurement process. In the shape measurement process, first, the measuring unit 35 measures the shapes of the previously placed sheet pile and the next placed sheet pile for a set of sheet piles 10 manufactured in step ST1. The measuring unit 35 outputs or transmits (hereinafter referred to as transmission) measurement data of the measured shapes to the shape measuring device 20. Here, in the shape measurement process of the sheet pile 10, the shape measurement using the measuring unit 35 is performed by, for example, measuring the distance from the measuring unit 35 to the surface of the sheet pile 10.

[0057] In addition, in the shape measurement process of the sheet pile 10, the shape of the sheet pile can be measured by photogrammetry using the acquired images, which involves capturing images of the sheet pile 10 from multiple viewpoints to acquire multiple pieces of image data. Specifically, point cloud data is acquired using a handheld 3D scanner constituting the measurement unit 35, and the acquired point cloud data is then polygonized (STL or meshed), and shape measurement and virtual placement are performed using CAD software that performs 3D measurement of the target sheet pile 10. Here, to realize virtual placement, for example, it is preferable to use the vertices of the shape as data points when grasping the shape in detail. That is, in order to measure the shape, it is preferable that the vertices of the shape are included in the data points of the point cloud data, and in practice, it is preferable that they be less than the radius of curvature of the vertices of the shape.

[0058] However, the shape of the sheet pile 10 is such that localized convexities are unlikely to occur. Therefore, the contact that affects the connection of the joint 11 of the sheet pile 10 is not localized but surface-wide. From this perspective, a resolution of approximately 1 mm is possible. Furthermore, for example, if the target accuracy of the data points is set to less than half the clearance, a judgment with sufficient accuracy for practical use is possible. Since the sheet pile 10 is considered a rigid body and connection judgment is performed using CAD software for 3D measurements, there is no problem with a pass / fail judgment when there is clearance. However, even if there is some interference, the sheet pile 10 may be able to fit due to its elastic deformation ability.

[0059] As described above, by setting a judgment reference value that takes into account measurement accuracy, ignoring local contact, frictional resistance, elastic deformation, and usage conditions (directivity during connection, such as vertical, horizontal, or diagonal, and outside temperature), it is possible to improve the accuracy of judgment. The judgment reference value does not necessarily have to be based on 0; for example, a digital clearance of -0.2 mm (a hypothetical interference amount of 0.2 mm) can be used as the reference to determine whether or not the parts are mated. Furthermore, depending on the measurement accuracy, interference may occur even when the clearance is a positive value, so it is desirable to set an appropriate judgment reference. Note that since positive and negative clearances depend on the method used, a negative value can also be used to indicate that clearance exists.

[0060] Furthermore, it is not necessary to measure the entire sheet pile 10; the measuring unit 35 only needs to measure the areas necessary for judgment according to the accuracy level. In this case, it is possible to shorten the measurement time and reduce the volume of measurement data. Furthermore, when converting the acquired point cloud data into polygons (STL conversion, mesh conversion), points within a predetermined surface error range (for example, 0.01 mm) can be omitted to reduce the data volume.

[0061] (Clearance measurement process) Next, proceeding to step ST3, an interference analysis step as part of the clearance measurement method will be described. Fig. 6 is a flowchart showing an interference analysis method according to one embodiment. The flowchart shown in Fig. 6 is executed by the shape measuring device 20.

[0062] (Acquisition step) 6, in the shape measurement method according to one embodiment, first, in step ST31 as an acquisition step, the control unit 21 of the shape measurement device 20 executes an acquisition process to acquire measurement data from the measurement unit 35. The measurement data is measurement data relating to the shape of the sheet pile 10, at least the shape of the joint portion 11, measured by the measurement unit 35 in step ST2.

[0063] (Connection completion status setting step) Next, the process proceeds to step ST32, which is the connection completion state setting step, and the shape calculation unit 211 of the control unit 21 executes a connection completion state setting process for each set of sheet piles 10, i.e., when the sheet piles 10 are connected to each other, based on the measurement data of the shape of the sheet piles 10 that has been acquired.

[0064] In the present invention, the "connection completion state" refers to a state in which the joint portions 11 of at least two sheet piles 10 are connected to each other and inserted to a predetermined position in the longitudinal direction, as shown in FIG. 2. For example, when the lengths of the connected sheet piles 10 along the longitudinal direction are the same, this refers to a state in which both ends of the sheet piles 10 along the longitudinal direction coincide with each other. The greatest feature of the present invention is that this connection completion state is set as the initial position, and the measurement of the interference level is started from the connection completion state. In this embodiment, the connection completion state is set as the initial position, and the shape measurement is performed in the connection completion state.

[0065] Usually, when checking the connection using the actual sheet piles 10, the sheet piles 10 are moved to the position where the joints 11 are connected, and the possibility of connection is confirmed when the piles stop. In particular, when virtually simulating connection using an information processing device such as a computer, there are multiple possible conditions for setting the position where the joints 11 start connecting with each other. In this case, it is necessary to consider many patterns to check the possibility of connection.

[0066] In contrast, the connection completion position where the connection and fitting of the joints 11 of the multiple connected sheet piles 10 are completed can be easily set in any environment, including virtual ones. Therefore, in this embodiment, the connection completion position is set as the initial position and shape measurement is performed, thereby simplifying the interference analysis process in the connection and making it possible to easily measure and analyze the shape regardless of the state of the sheet piles 10.

[0067] Here, a method for setting the judgment start position in step ST32 will be described. Fig. 7 is a flowchart showing a method for setting the judgment start position according to this embodiment. Fig. 8 is a diagram for explaining the coordinates of the sheet piles in the shape measurement method according to this embodiment. Fig. 9 is a diagram for explaining the central plane of the sheet pile wall and the effective width per sheet pile in setting the judgment start position according to this embodiment. The flowchart shown in Fig. 7 is executed by, for example, the shape measurement device 20.

[0068] First, in step ST321, the neutral plane of the sheet pile wall is set based on the sheet pile 10 that was previously placed (previously placed). Next, in step ST322, the sheet pile 10 to be placed next (nextly placed) is fitted to the position of the previously placed sheet pile 10, and a positioning is performed that minimizes the error with respect to the designated point. Specifically, for example, when the overall shape is used, the positions of the previously placed sheet pile 10 and the next placed sheet pile 10 are most closely matched. After that, in step ST323, the sheet pile 10 is moved to the connecting position where the joint portion 11 is connected.

[0069] That is, as shown in FIG. 8, a virtual plane, i.e., a fit plane, that minimizes the error from the specified point is defined for any range of the flat portion at the center of the sheet pile 10. A coordinate system is established for the defined fit plane by, for example, setting the short side direction as the X direction, the Y direction from the fit plane toward the side where the joint 11 does not exist as the Z direction, and the longitudinal direction as the Z direction. In the case of a steel pipe sheet pile, for example, since there is no flat portion at the center of the sheet pile 10, a coordinate system is established by another method. For example, a virtual cylinder, i.e., a fit cylinder, that minimizes the error from the specified point is defined for the surface of the steel pipe. The direction of the central axis of the defined cylinder is set as the Z direction, the direction from the central axis (Z axis) to the center of the connecting joint 11 is set as the X direction, and the direction rotated 90 degrees from the Z direction and the X direction is set as the Y direction.

[0070] Also, as shown in Figure 9, using the example of a U-shaped sheet pile 12 placed first and a sheet pile 13 placed next, the central plane T of the connection between the sheet piles 12, 13, the height H of each of the sheet piles 12, 13, and the effective width B of each of the sheet piles 12, 13 are set.

[0071] That is, as shown in Figures 7 and 9, first, in step ST321, the position of the neutral plane of the sheet pile wall is set based on the previously placed sheet pile 12. For example, for each pair of U-shaped sheet piles 12, 13, i.e., for the pair of sheet piles 12, 13, the center between the joints 11 becomes the central plane T, which is the neutral plane of the sheet pile wall. Next, in step ST322, the next sheet pile 13 is fitted to the previously placed sheet pile 12. Note that the shape used for fitting may be the entire shape, or any selected portion may be extracted and used. Next, in step ST323, the next sheet pile 13 is moved along the central plane T by the preset effective width B of each sheet pile 12, and then rotated 180 degrees relative to the central plane T. This completes the movement of the next sheet pile 13 to the connection position with the previously placed sheet pile 12, and the determination start position is set.

[0072] (Another example of how to set the judgment start position) Further, other examples of the method for setting the judgment start position will be described. Figures 10, 11, and 12 are diagrams for explaining the central plane of the sheet pile wall and the effective width per sheet pile in setting the judgment start position according to the first, second, and third examples of this embodiment, respectively.

[0073] (Another example of how to set the judgment start position) As shown in FIG. 10, for hat-shaped sheet piles 12, 13, the center plane T, the height H, and the effective width B of each sheet pile 12, 13 can be set. That is, as shown in FIGS. 7 and 10, first, in step ST321, the position of the neutral plane of the sheet pile wall is set based on the previously placed sheet pile 12. Specifically, for hat-shaped sheet piles 12, 13, the center (position H / 2) of the height H of the sheet piles 12, 13 can be set as the center plane of the sheet pile wall. Next, in step ST322, the next sheet pile 13 is fitted to the previously placed sheet pile 12. The shape used for fitting may be the entire shape, or an arbitrary portion may be extracted and used. Next, in step ST323, the next sheet pile 13 is moved along the center plane T by the previously set effective width B of each sheet pile 12. This completes the movement of the next sheet pile 13 to the connecting position with the previous sheet pile 12, and the judgment start position is set.

[0074] (Another second example of how to set the judgment start position) As shown in FIG. 11, the center plane T, the height H, and the effective width B of each sheet pile 12, 13 can be set for a linear sheet pile 10. That is, as shown in FIGS. 7 and 11, first, in step ST321, the position of the neutral plane of the sheet pile wall is set based on the previously placed sheet pile 12. Specifically, for linear sheet piles 12, 13, the center of the height H of the sheet piles 12, 13 (position H / 2) can be set as the center plane of the sheet pile wall. Next, in step ST322, the next sheet pile 13 is fitted to the previously placed sheet pile 12. The shape used for fitting may be the entire shape, or an arbitrary portion may be extracted and used. Next, in step ST323, the next sheet pile 13 is moved along the center plane T by the previously set effective width B of each sheet pile 12, and then rotated 180 degrees relative to the center plane T. This completes the movement of the next sheet pile 13 to the connecting position with the previous sheet pile 12, and the judgment start position is set.

[0075] (Third example of how to set the judgment start position) As shown in FIG. 12, the center plane T, the height H, and the effective width B of each sheet pile 12, 13 can be set for steel-tube-shaped sheet piles 12, 13. That is, as shown in FIGS. 7 and 9, first, in step ST321, the position of the neutral plane of the sheet pile wall is set based on the previously placed sheet pile 12. For example, in the case of steel-tube-shaped sheet piles 12, 13, the center between the joints 11 becomes the center plane T, which is the neutral plane of the sheet pile wall. Next, in step ST322, the next sheet pile 13 is fitted to the previously placed sheet pile 12. Note that the shape used for fitting may be the entire shape, or an arbitrary portion may be extracted and used. Next, in step ST323, the next sheet pile 13 is moved along the center plane T by the previously set effective width B of each sheet pile 12. This completes the movement of the next sheet pile 13 to the connection position with the previously placed sheet pile 12, and the determination start position is set.

[0076] The above-mentioned method for setting the judgment start position and the shapes of the target sheet piles 12, 13 in the other first to third examples are examples, and the shapes of the sheet piles 12, 13, the method for creating the coordinate system, and the method for positioning are merely examples and can be performed in any manner. Furthermore, the present invention can be applied to any object in which the sheet piles 10, 12, 13 are used as part of the sheet pile wall, and a separate member such as an H-shaped steel may be welded to the sheet pile wall.

[0077] (Interference analysis step) After the method for setting the judgment start position by step ST32 is completed, the process returns to FIG. 6 and proceeds to step ST33, which is an interference analysis step. In step ST33, the shape calculation unit 211 of the control unit 21 derives the interference state between the joint parts 11 in the connection completion state based on the measurement data of the sheet pile 10. The shape calculation unit 211 derives the interference state at a predetermined location. Specifically, for example, based on the coordinate system shown in FIG. 8, the interference analysis step performs judgment at a cross section of the sheet pile 10 as shown in FIG. 2, which is a predetermined location along the longitudinal direction. Note that the judgment locations are not necessarily limited to predetermined positions or numbers.

[0078] In step ST33 shown in Fig. 6, the shape calculation unit 211 generates shape data corresponding to a cross section, i.e., cross-sectional view data, based on the acquired shape data, for example, at approximately three predetermined positions. As a result, the shape calculation unit 211 derives shape information between the joint portions 11. In other words, the shape calculation unit 211 can automatically derive shape information for a predetermined position using a predetermined method. Note that the cross-sectional view data generated by the shape calculation unit 211 may be output to the input / output unit 23 of the shape measurement device 20, and an operator may visually determine the state of interference (interference level) that affects connection or fitting, and input the interference level from the input / output unit 23.

[0079] 13 and 14 show an example of a cross section of the sheet pile 10 converted into data, generated by the shape calculation unit 211 of the shape measurement device 20 according to this embodiment. FIGS. 13 and 14 are enlarged cross sections showing the connecting portion of the sheet pile 10 according to this embodiment and the interfering portion at the connecting portion, respectively. FIG. 13 specifically shows a state in which the joint portions 11 of the converted sheet piles 10 do not interfere with each other and the insertion of the sheet piles 10 into each other is completed, while FIG. 14 specifically shows a state in which the joint portions 11 of the converted sheet piles 10 are partially interfering with each other.

[0080] In the state shown in Figure 13, there is no interference between the joints 11 of the inserted sheet piles 12, 13. This is a state in which the positions of the joints 11 are matched and the interference level is low, and the sheet piles 10 can be connected to each other.

[0081] Here, the interference level is determined as follows. That is, after performing a predetermined alignment as the connection position, the level of interference is determined based on whether or not the clearance c of the joint portion 11 is secured. If the clearance c is secured, the interference level is determined to be low, and if it is not secured, the interference level is determined to be high. Furthermore, when determining the presence or absence of interference using the clearance c on the opposite side of the predicted interference location, it is possible to determine that the interference level is low if the clearance c on the opposite side of the predicted interference location is equal to or less than a predetermined value allowed at the predicted interference location, and that the interference level is high if it is greater than the predetermined value.

[0082] The following example can be given as a definition of clearance c. That is, as an example, the distance can be measured in the normal direction between each point or the line connecting the points, i.e., for each mesh, at the joint 11 of the previously placed sheet pile 12, and the distance when the line touches the joint 11 of the next placed sheet pile 13 in the connected state, i.e., the shortest distance, can be defined as clearance c. Conversely, the distance from the joint 11 of the next placed sheet pile 13 toward the joint 11 of the previously placed sheet pile 12 can be defined as clearance c. Note that the definition of clearance c is not limited to the above example, and various definitions based on visual inspection or examination using representative points can be adopted depending on the conditions.

[0083] On the other hand, as shown in Figure 14, when an interference part E occurs at least partially between the joints of the sheet piles 10 due to the positional relationship between the joints 11 of the sheet piles 12, 13, the joints 11 cannot be connected. In this state, the joints 11 are not properly connected to each other and the interference level is high, and the clearance c between the joints 11 is, for example, about -1 mm at its maximum, i.e., the interference part E is about 1 mm.

[0084] The shape calculation unit 211 stores the clearance c calculated at a plurality of cross sections set in advance, for example, three cross sections, as shape information in the shape database 221. Note that the clearance c calculated by the shape calculation unit 211 is preferably calculated to the extent possible for all of the clearances c on the plane at a plurality of cross sections set in advance at the joint 11. Then, the minimum clearance c is calculated, and the positional relationship of the joint 11 is also calculated.

[0085] Specifically, the shape calculation unit 211 extracts the value that minimizes the clearance c of the joint portion 11 in each of the pre-set cross sections using predetermined measurement software. Information on the derived clearance c may be stored in the storage unit 22 in association with the sheet pile identification ID of the sheet pile type information stored in the sheet pile type database 222.

[0086] (Connection possibility determination step) Next, the process proceeds to step ST34, which is a clearance determination step, where the determination unit 212 of the control unit 21 reads shape information from the shape database 221 of the storage unit 22 and determines whether or not connection is possible according to a predetermined criterion. That is, the determination unit 212 makes the determination based on, for example, whether or not the clearance c between the joint portions 11 is equal to or less than a predetermined value. Note that the predetermined value can be set to any value, and in this embodiment, the predetermined value is set to 0, for example.

[0087] If interference occurs, the Z axis may be moved to the side with the larger clearance on the cross section to be determined, and the presence or absence of interference may be determined at this stage. If further interference occurs, the Z axis angle may be adjusted and the presence or absence of interference may be determined at this stage. The order of Z axis movement is not limited to the above-described order and can be performed in any order. Alternatively, the presence or absence of interference may be determined by setting an appropriate reference value without moving the Z axis.

[0088] (Interference information assignment step) If the determination unit 212 determines in step ST34 that the clearance c between the joints 11 is equal to or less than a predetermined value, specifically, for example, equal to or less than 0 (c≦0) (step ST34: Yes), the process proceeds to step ST38. In step ST38, the determination unit 212 executes an interference information assignment process to assign information on the interfering portion E in the sheet piles 10, 12, 13 to be measured. The determination unit 212 outputs rejection information to which the information on the interfering portion E has been assigned, and stores the rejection information as shape information in the shape database 221. This completes the interference analysis process.

[0089] In addition, sheet piles 10, 12, and 13 that have been judged to be unacceptable can be modified using the sheet pile processing device 40 or 40A to pass the standard. In this case, modifying the clearance c to be sufficiently large can reduce the possibility of the piles being unable to be connected. On the other hand, if the clearance c is too large, it can lead to a decrease in the strength, rigidity, or watertightness of the joint 11 when the sheet piles 10, 12, and 13 are used as structural members. Therefore, it is preferable to modify the sheet piles 10, 12, and 13 so that the clearance c is within an appropriate range.

[0090] On the other hand, if the determination unit 212 determines in step ST34 that the clearance c between the joint portions 11 is greater than the predetermined value, specifically, for example, greater than 0 (c>0) (step ST34: No), the process proceeds to step ST35.

[0091] (Connection determination step) In step ST35, which serves as a connection determination step, the determination unit 212 determines whether the connection between the joints 11 of the sheet piles 12, 13 has been released. If the determination unit 212 determines in step ST35 that the connection between the joints 11 has not been released (step ST35: No), the process proceeds to step ST36, which serves as a movement state setting step. In step ST36, the shape calculation unit 211 sets a state in which the joints 11 of the sheet piles 12, 13, which have been converted into data, have been moved a predetermined distance in a direction in which the connection between them is released (connection release direction). The predetermined distance is a preset movement amount.

[0092] After the moving state setting step in step ST36 is completed, the process returns to step ST33. The shape calculation unit 211 derives the clearance c between the joints 11 at a predetermined location. The control unit 21 repeatedly executes steps ST33 to ST36 until the clearance c becomes equal to or less than a predetermined value (step ST34: Yes) or the connection of the joints 11 is released (step ST35: Yes).

[0093] If the connection of the joints 11 is released (step ST35: Yes), the process proceeds to step ST37. In step ST37, the judgment unit 212 outputs information that the sheet pile 10 to be measured is acceptable, and stores this acceptable information in the shape database 221 as shape information. The acceptable information includes clearance information determined in step ST34. This allows the shape calculation unit 211 to virtually derive the clearance c of the entire length of the joints 11 along the longitudinal direction until the connection between the joints 11 of the sheet piles 12, 13 is released. This completes the interference analysis process.

[0094] As in the above example, whether the sheet piles 12, 13 can be completely inserted into each other was confirmed by determining whether the amount of interference at the interference portion E between the joints 11 of the sheet piles 12, 13 satisfies a predetermined value. As described above, if the clearance c of the connecting portions at multiple predetermined locations is greater than a predetermined value, no interference portion E occurs, and it is determined that the joints 11 of the sheet piles 12, 13 can be connected. Here, if the predetermined value is set to 0, the determination unit 212 can determine that no interference portion E occurs and the joints 11 can be connected if the clearance c is always positive.

[0095] Furthermore, in this static study, a method was adopted in which measurement software and CAD were used to assume that the overall shape of the joint is rigid and does not deform, but in dynamic studies, methods can also be used that take into account elastic deformation of the joint shape due to minute partial interference, friction resistance, etc. In dynamic studies, dynamic analysis using FEM or mechanism analysis can be performed, making it possible to determine interference based on fluctuations in load, contact, friction, etc.

[0096] Thereafter, the process proceeds to step ST4 shown in FIG. 5, where the control unit 21 executes a process of outputting information on whether the sheet pile 10 being measured is pass or fail to the input / output unit 23. Note that for sheet piles 10 that are judged to be failing, a mark may be put on the actual sheet pile 10. Also, for sheet piles 10 that are judged to be failing, it is possible to appropriately select whether to perform an adjustment process or discard them. This completes the sheet pile measurement process.

[0097] Based on the above-described sheet pile measurement method, it is possible to control the quality of the sheet pile 10. That is, in the quality control method for the sheet pile 10, first, the sheet pile 10 is manufactured by a sheet pile manufacturing process in step ST1. Next, the shape of the sheet pile 10 is measured by a shape measurement process in step ST2. After that, in step ST3, an interference analysis process is performed using the measurement results obtained by the shape measurement process, thereby making it possible to control the quality of the sheet pile 10 as a quality control process.

[0098] According to the method for measuring the sheet piles 10 according to one embodiment of the present invention described above, it is possible to check whether the sheet piles 10 can be connected after the manufacture thereof is completed or before construction. Conventionally, this was determined by actually connecting the joints 11, but this method ensures accuracy by checking interference between the joints 11 as clearance c based on information from the measurement results. Furthermore, because the method starts from the completed connection position of the sheet piles 10, there is no need to search for the start position of connection, and it is also possible to detect interference points early, allowing for efficient start of measurement of the clearance c of the sheet piles 10.

[0099] Furthermore, regardless of the condition of the sheet piles 10, such as their length or size, prior connection confirmation at a site such as a factory can be safely and easily performed. Furthermore, the measurement method for the sheet piles 10 according to this embodiment can be used not only in factories but also in storage areas at construction sites. Specifically, for example, if there is concern about deformation of the sheet piles 10 at a construction site due to damage caused by welding or transportation of additional members or excessive exposure to direct sunlight, the shape of the sheet piles 10 can be measured by the measuring unit 35 at the storage area at the construction site, and connection determination can be performed before the actual connection, minimizing the need for work at the site to be stopped due to problems.

[0100] Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above-described embodiments, and various modifications based on the technical concepts of the present invention are possible. For example, the numerical values ​​and materials given in the above-described embodiments are merely examples, and different numerical values ​​and materials may be used as necessary.

[0101] For example, in the above-described embodiment, the sheet pile 10 is shown as an example, but various shapes can be adopted as the shape of the sheet pile 10, specifically, U-shaped, hat-shaped, straight, steel pipe-shaped, composite type combining multiple members, etc., as long as there are joints connecting the sheet piles together. The present invention can be similarly effective without being limited by the shape, manufacturing method, joint shape, etc. of the sheet pile 10. [Explanation of symbols]

[0102] 1,1A Sheet Pile Measurement System 2 Network 10, 12, 13 Yaita 11 Joint 14 Claw 15 Groove 16 Opening 20,20A Shape measuring device 21, 31, 41 Control unit 22,32,42 Storage section 23,33,43 Input / output section 24, 34, 44 Communications Department 30A Measuring Terminal 35 Measurement section 40,40A Sheet pile processing equipment 45 Steel sheet pile processing department 211 Shape calculation section 212 Judgment section 221 Shape Database 222 Plate Type Database 311 Measurement control section 411 Processing control unit

Claims

1. A shape measurement method for analyzing an interference level indicating the degree of interference between joints of a pair of sheet piles having joints connecting the sheet piles, A connection completion state setting step for setting a connection completion state in which the connection between the first-placed sheet pile and the second-placed sheet pile is completed based on data of the shapes of the first-placed sheet pile and the second-placed sheet pile; An interference analysis step of analyzing an interference level between the joint portions of the sheet piles in the connection completion state. Shape measurement method.

2. A step of determining whether the set of sheet piles is pass or fail based on the interference level measured in the interference analysis step; an interference information assigning step of assigning information about an interference portion to a portion determined to be an interference portion based on the interference level measured in the interference analysis step; The method includes at least one of the steps The shape measuring method according to claim 1 .

3. A shape measurement process for measuring the shapes of a previously placed sheet pile and a subsequently placed sheet pile for a set of sheet piles having joints connecting the sheet piles to each other; and a shape measuring step of analyzing an interference level for each set of the sheet piles by the shape measuring method according to claim 1 or 2 based on data of the shape measured in the shape measuring step. How to measure sheet piles.

4. A method for manufacturing a set of sheet piles having joints that connect the sheet piles together, a sheet pile manufacturing process for manufacturing sheet piles; A shape measurement process of performing the sheet pile measurement method according to claim 3 on the set of sheet piles having joints manufactured by the sheet pile manufacturing process. Sheet pile manufacturing method.

5. A quality control method for sheet piles that controls the quality of a set of sheet piles having joints that connect the sheet piles together, A sheet pile manufacturing process for manufacturing the sheet pile; A shape measurement process for measuring the shape of the sheet pile by the sheet pile measurement method according to claim 3 for the set of sheet piles manufactured by the sheet pile manufacturing process; A quality control process for controlling the quality of the manufactured sheet pile using the results obtained from the shape measurement process. Quality control methods for sheet piles.

6. A shape measuring device that analyzes the interference level between joints of a set of sheet piles having joints that connect the sheet piles together, A connection completion state setting process for setting a connection completion state in which the connection between the sheet piles is completed based on the shape data of the first sheet pile and the second sheet pile; An interference analysis process for analyzing the interference level between the joint portions of the sheet piles in the connection completion state. Shape measuring device.

7. Further, a communication unit is provided, The communication unit, by the control unit, At least one of the following is executed: acquisition of data on the shapes of the first and second sheet piles; and output of information on the interference level obtained by the interference analysis process. The shape measuring device according to claim 6.

8. A measuring unit configured to be able to measure the shapes of a first sheet pile and a second sheet pile for a set of sheet piles having joints that connect the sheet piles together; and a shape measuring device according to claim 6 or 7, which analyzes an interference level for each set of the sheet piles based on the shape data measured by the measuring unit. Sheet pile measurement system.

9. A measurement terminal configured to be able to analyze the interference level between the joints of a set of sheet piles having joints connecting the sheet piles, and controlled by a control unit, A measurement unit that measures the shapes of the first and second sheet piles under the control of the control unit; A communication unit that executes at least one of an output process that outputs the measured shape as data to the shape measuring device according to claim 6 under the control of the control unit, and an acquisition process that acquires information about the interference level for each set of sheet piles from the shape measuring device; an output unit that is capable of outputting the acquired information in a predetermined format under the control of the control unit; Measurement terminal.

10. The control unit A process of determining whether the set of sheet piles passes or fails based on the information regarding the interference level obtained and a predetermined criterion; an interference information assigning process for assigning information about the interference portion to a portion determined to be an interference portion based on the acquired information about the interference level and a predetermined criterion. The measurement terminal according to claim 9.

11. The measurement terminal according to claim 9 ; and a shape measuring device according to claim 6, which analyzes an interference level for each set of the sheet piles based on shape data measured by the measuring terminal. Sheet pile measurement system.

12. A method for controlling the quality of a sheet pile for a set of sheet piles having joints that connect the sheet piles to each other, comprising: The quality of the set of sheet piles is managed using information on the interference level obtained from the interference analysis process executed by the control unit of the shape measuring device according to claim 6 or 7. Quality control methods for sheet piles.

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