Measuring method, and method for constructing structure

Abstract

This measuring method, with which it is possible to reduce the time and effort involved in installing three-dimensional surveying equipment, includes (step S104 and step S106): using a sensor device and the three-dimensional surveying equipment to measure position information at a predetermined measuring point of a built-in pillar (construction material); and acquiring calibration information of position information to be measured using the sensor device on the basis of measurement results from both the sensor device and the three-dimensional surveying equipment.

Description

Measurement methods and structure construction methods

[0001] The present invention relates to a measurement method and a method for constructing a structure, and more particularly to a measurement method for measuring a structural material of a structure as an object and a method for constructing a structure using the measurement method.This application claims priority to Japanese Patent Application No. 2022-110227, filed on July 8, 2022, the contents of which are incorporated herein by reference.

[0002] Conventionally, when constructing a building structure, it is necessary to inspect that structural materials constituting columns, walls, etc. are assembled without tilting or distortion. For example, to measure the accuracy of steel frame erection, a surveying instrument (such as a total station) that constitutes part of an erection support system is used (see, for example, Patent Document 1). However, the accuracy of steel frame erection is measured multiple times using a total station for each steel frame column, such as when adjusting the position (including adjusting for misalignment and tilt) after temporary fixation, when re-measuring after inserting beams, after fully tightening column joints, and after welding columns.

[0003] However, as mentioned above, measuring pillar tilt and the like multiple times using a total station or similar equipment is a time-consuming and labor-intensive task. Furthermore, since total stations and similar equipment must be reused on-site, each time a measurement is made, the total station or similar equipment must be re-installed and the reference settings must be re-set. Furthermore, there is a risk of measurement errors occurring due to repeated measurements. Thus, there is clearly room for improvement in the conventional method of measuring structural materials using surveying equipment such as total stations.

[0004] Patent No. 6433033

[0005] According to a first aspect, there is provided a measurement method for measuring a structural material of a structure as an object, the measurement method including measuring position information of the structural material using a three-dimensional surveying instrument and a sensor device attached to the structural material, respectively, and obtaining calibration information for calibrating the measurement information of the sensor device based on the measurement results of the position information of both the three-dimensional surveying instrument and the sensor device.

[0006] According to the second aspect, there is provided a method for constructing a structure that utilizes the measurement method according to the first aspect, in which the structural material of a structure under construction is the target, in which a column to be erected is used as the target, and information on the inclination angle at a predetermined measurement point is measured using the sensor device and the three-dimensional surveying instrument, and based on the measurement results, calibration information is obtained to match the information on the inclination angle measured by the sensor device with the information on the inclination angle measured by the three-dimensional surveying instrument.

[0007] According to a third aspect, there is provided a method for constructing a structure including columns with multiple sections, which includes setting an offset to a target value for erection of the capital of a column at an upper section based on information on the inclination angle at a measurement point of the column to be measured, measured by a sensor device pre-attached to the column to be measured at the time of erecting or immediately before erecting the column at an upper section of the column to be measured.

[0008] According to a fourth aspect, there is provided a method for constructing a structure including columns of multiple sections, which comprises, after completion of welding of a column to be measured to which a sensor device is attached, and prior to erecting a column of an upper section of the column to be measured, measuring a temperature t in parallel with measuring information on the inclination angle of the column to be measured at predetermined sampling intervals over a predetermined period of time using the sensor device, determining a function f representing the information on the inclination angle obtained by the sensor device, which includes the temperature t as a parameter, based on the sampling data obtained by the measurement, and setting an offset to a target value for erection of the column capital of the upper section based on the function f in which a reference temperature T is substituted for the parameter t.

[0009] Fig. 2 is a diagram showing an outline of the overall configuration of a measurement system according to one embodiment. Fig. 3 is a block diagram showing an example of the configuration of the sensor device of Fig. 1. Fig. 4 is a flowchart showing the processing flow for erecting an n-node column. Fig. 5 is a diagram showing the erection piece provided on each column and the plumbing adjustment jig attached to the erection piece. Fig. 6 is a flowchart for explaining steel frame erection measurement. Fig. 7 is a conceptual diagram showing the flow of steel frame erection measurement.

[0010] An embodiment of a measurement method for measuring the structural materials of an architectural structure will be described below with reference to Figures 1 to 6. The measurement method according to this embodiment uses a sensor device that measures the structural materials of the architectural structure.

[0011] First, the definition of the measurement target and direction of the sensor device will be described. In the following, as an example, the measurement target (object) of the sensor device is a steel column 100 of one section that constitutes a multi-section steel-frame building. ｐ In a steel-frame building, a steel column erected on a foundation is called the "first section steel frame," and a steel column erected on top of that is called the "second section steel frame," with the number representing the section (section number) increasing with each subsequent rise. In the following description, as shown in FIG. 6(A) and other figures, the vertical direction (direction of gravity) is defined as the Z-axis direction, the left-right direction in the plane perpendicular to the Z-axis is defined as the X-axis direction, the direction perpendicular to the Z-axis and the X-axis is defined as the Y-axis direction, and the tilt (rotation) directions around the X-axis, Y-axis, and Z-axis are defined as the θx, θy, and θz directions, respectively.

[0012] 1 shows a schematic diagram of the overall configuration of a measurement system 10 used in the construction measurement of steel-framed structures. The measurement system 10 comprises a server 12, a site computer 14, a mobile terminal 16, and a plurality of sensor devices 18, all of which are connected to one another via a wide area network (hereinafter abbreviated as network) 13 such as the Internet. ｉ (i=1, 2, 3, . . . ), and a plurality of three-dimensional surveying instruments 30 ｊ (j=1, 2, ...) including a plurality of sensor devices 18 ｉ are connected to the network 13 via a communication line, for example, a wireless LAN. ｉ Among these, three sensor devices 18 １ ~18 ３ Similarly, a plurality of three-dimensional surveying instruments 30 ｊ are connected to a network 13 via a communication line, for example, a wireless LAN. ｊ Among these, two three-dimensional surveying instruments 30 １, 30 ２ is shown as a representative example.

[0013] The communication lines may all be wireless, or at least some may be wired. ｉ and a plurality of three-dimensional surveying instruments 30 ｊ The output of the sensor devices 18 is provided to a server 12 via a communication line and a network 13. In the following, the network 13 is connected to the server 12, a field computer 14, a mobile terminal 16, and a plurality of sensor devices 18. ｉ and a plurality of three-dimensional surveying instruments 30 ｊ A network including all of the communication lines connecting the above will be referred to as network 13 using the same reference numeral as wide area network 13. In this embodiment, a commonly used server computer is used as server 12, but a cloud (computer) may also be used.

[0014] In this embodiment, the on-site computer 14 is a commonly used computer. The on-site computer 14 is equipped with an operation unit such as a keyboard and a mouse, and a screen such as an LCD display. The on-site computer 14 performs data communication between the server 12 and the mobile terminal 16 via the network 13 in response to instructions input via the operation unit by a site supervisor or other manager. The on-site computer 14 does not need to be provided, and may be replaced by the mobile terminal 16. In this case, the manager (such as the site supervisor) uses the mobile terminal 16 to perform data communication with the server 12 and data communication with other mobile terminals 16 carried by on-site workers via the network 13. The mobile terminal 16 is carried by a worker at the construction site. The mobile terminal 16 is, for example, a smartphone or a tablet PC.

[0015] Sensor device 18 ｉ Measurement instructions for the sensor device 18 are given from the mobile terminal 16, the on-site computer 14, or the server 12 via the network 13. ｉThe output data from the sensor device 18 is provided to the server 12 via the network 13. ｉ The server 12 performs necessary calculations using output data from the mobile terminal 16, and provides necessary information to the mobile terminal 16 in response to an inquiry from the mobile terminal 16 or in accordance with a predetermined program.

[0016] 3D surveying equipment 30 ｊ As an example, a total station that does not require a prism or other targets and is capable of three-dimensional measurement is used. ｊ By emitting light to a target point (measurement position) and receiving the reflected light (return light), a single machine can simultaneously measure tilt angles (vertical and horizontal angles) and distance. The three-dimensional surveying instrument may be a 3D laser scanner or the like, and any measuring device may be used, regardless of the method, as long as it is capable of measuring angle and distance information. The term "surveying" used in this specification is broadly defined and is synonymous with simple measurement. The three-dimensional surveying instrument described in this specification can also be referred to as a three-dimensional measuring device or a three-dimensional measuring instrument.

[0017] 3D surveying equipment 30 ｊ Measurement instructions and the like for the three-dimensional surveying instrument 30 are given via the network 13 from either the mobile terminal 16, the on-site computer 14, or the server 12. ｊ The output data from the three-dimensional surveying instrument 30 is provided to the server 12 via the network 13. ｊ The server 12 performs necessary calculations using output data from the mobile terminal 16, and provides necessary information to the mobile terminal 16 in response to an inquiry from the mobile terminal 16 or in accordance with a predetermined program.

[0018] Here, the sensor device 18 ｉ The specific configuration of the sensor device 18 will be described. ｉ2, each of the components includes an angle sensor 181, a processing unit 182, a wireless communication unit 183, a power supply unit 184 formed of, for example, a battery, a temperature sensor 186, and a display / operation unit 187, as well as a waterproof housing 185 that houses these components. The power supply unit 184 is configured so that the power supply to each component can be turned on and off by remote control from an external device (for example, the server 12, the on-site computer 14, or the mobile terminal 16). Alternatively, a power switch that can be manually turned on and off may be provided on the housing 185.

[0019] In this embodiment, a 3D MEMS (three-dimensional microelectromechanical system) tilt angle (inclination angle) sensor is used as the angle sensor 181, as an example. The 3D MEMS tilt angle sensor is a precision tilt sensor developed using 3D MEMS technology. The 3D MEMS tilt angle sensor requires extremely low power consumption, in the microampere range, making it suitable for wireless applications. The angle sensor 181 includes two MEMS acceleration sensors with symmetric output characteristics and an ASIC. For example, the angle sensor outputs information on tilt angles (α, β, γ) in three directions (θx, θy, and θz) based on the direction of gravity (Z-axis direction). The tilt angle is the tilt angle of the normal vector of the measurement surface at the measurement point. Therefore, the shift amount (lateral deviation) of the measurement point can be calculated from the tilt angle through geometric calculations. The angle sensor is not limited to a 3D MEMS tilt angle sensor; other types of three-dimensional tilt angle sensors may also be used. Furthermore, the angle sensor is not limited to a three-dimensional tilt angle sensor, but may be a two-dimensional tilt angle sensor or a one-dimensional tilt angle sensor depending on the object to be measured. In this case, a two-dimensional tilt angle sensor and a one-dimensional tilt angle sensor may be combined, or a plurality of two-dimensional or one-dimensional tilt angle sensors may be combined.

[0020] The arithmetic processing unit 182 is made up of, for example, a microcontroller unit (MCU), and has a CPU, a memory device, an input / output circuit, and a timer circuit (not shown). The arithmetic processing unit 182 executes a processing algorithm defined by a program stored in the memory device. ｉInstead of providing the arithmetic processing unit 182, the ASIC built in the angle sensor 181 may also have the function of the arithmetic processing unit 182.

[0021] In this embodiment, the wireless communication unit 183 functions as a Wi-Fi communication (wireless LAN communication) unit. ｉ The wireless communication unit 183 can perform wireless LAN communication with the server 12 and other devices connected to the network 13 via the network 13. Note that a wired communication unit may be provided in place of part of the wireless communication unit 183.

[0022] As an example, a MEMS non-contact temperature sensor is used as the temperature sensor 186. The MEMS non-contact temperature sensor measures the temperature of the surface of an object without contact by receiving radiant heat energy from the object using a thermopile element. The power required by the MEMS non-contact temperature sensor is extremely low, consuming power in the microampere range. The temperature sensor is not limited to a MEMS non-contact temperature sensor, and other types of temperature sensors may also be used. The display operation unit 187 is configured, for example, by a so-called touch panel, and allows data input and display using a human finger or a touch pen.

[0023] Although not shown in the drawings, a plurality of recesses are formed in the bottom wall (wall on the back side) of the housing 185, and a permanent magnet is embedded in each recess. ｉ The sensor device 18 can be attached to an object such as a steel frame with a single touch by utilizing the magnetic force of a permanent magnet. In addition, the side of the bottom wall of the housing 185 is provided with a plurality of recesses that allow insertion of a tool when removing the sensor device 18. ｉThe sensor device can be removed from the object in a relatively short time. A magnetic shielding member is disposed inside the housing 185 near the rear surface, effectively preventing the magnetic force of the permanent magnet from affecting the internal components. The method of fixing the sensor device to the object is not limited to magnetic force, and other fixing methods may be used. For example, mechanical fixing methods or adhesive methods using adhesive or double-sided tape may be used. In this case, the object to which the sensor device is fixed is not limited to a steel frame (i.e., the fixing method does not depend on the material of the object).

[0024] The sensor device 18 configured as described above ｉ Measurement data (sensor data) such as tilt angle and temperature is output from the angle sensor 181 and the temperature sensor 186 to the outside via the wireless communication unit 183, and this sensor data includes an ID that is identification information of the sensor device. For example, the ID is linked to the output information from the angle sensor 181 and the temperature sensor 186 by the arithmetic processing unit 182. Therefore, the server 12 or the like that receives the sensor data via the network 13 can reliably identify which sensor device the sensor data came from.

[0025] In addition, the sensor device 18 ｉ is not limited to the configuration of this embodiment, and the angle sensor 181, the wireless communication unit 183, the temperature sensor 186, etc. may not all be configured as an integrated unit. For example, the angle sensor 181 and / or the temperature sensor 186 may be connected to other units via a wireless or wired communication line, and data may be output from the angle sensor 181 and / or the temperature sensor 186 and power may be supplied to the angle sensor 181 and / or the temperature sensor 186 via the communication line.

[0026] Next, the steel frame construction method (hereinafter referred to as "construction") will be explained with reference to the flowchart in Figure 3, focusing on the construction of n (≧2) section steel frames (hereinafter referred to as "n-section columns" where appropriate). Figure 3 shows the processing flow for constructing n-section columns. Before construction of the n-section column can begin, construction of the (n-1)-section column must be completed.

[0027] First, in step S2, the upper joint column (here, the n-th joint column) 100 ｐIn the next step S4, the lower section pillar (here, the (n-1) section pillar) 100 ｑ As an example, as shown in FIG. 4, each column 100 (100 in FIG. 4) is attached with a plumb adjustment jig. ｐ or 100 ｑ ) are each made of steel pipes (column steel frames) with a rectangular cross section, and erection pieces 40 are respectively protruding from the base and capital of the column steel frames. The erection pieces 40 are welded to the four mutually orthogonal faces of the column steel frames with a rectangular cross section. Each erection piece 40 is perpendicular to each face of the column 100 and extends in the vertical direction. Lower column 100 ｑ Four plumbing adjustment jigs 50 are respectively attached to the erection pieces 40 on the four sides of the column. The plumbing adjustment jig 50 used in this embodiment is attached to the joint of the column to prevent the column from falling over, adjust misalignment, adjust tilt, etc. A detailed configuration of a steel column inclination adjustment device having a configuration similar to that of the plumbing adjustment jig 50 is disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-355340.

[0028] The plumbing adjustment jig 50 is ｐ The erection piece 40 of the column base and the lower joint column 100 ｑ The main frame 50A is a connecting body that connects the pillar head to the erection piece 40, and a plurality of bolts (specifically, anti-tip bolts, misalignment adjustment bolts, tilt adjustment bolts, etc.) attached to the main frame 50A to realize the various adjustment functions described above.

[0029] Returning to FIG. 3, in the next step S6, the upper section column 100 ｐ The lower joint column 100 is lifted in by a crane and then adjusted with the plumbing adjustment jig 50. ｑ Specifically, the upper section column 100 ｐ The lower joint column 100 ｑ The erection piece 40 of the capital of the column (or the upper column 100 ｐ The four plumbing adjustment jigs 50 attached to the erection pieces 40 of the column bases are opened (see FIG. 4). ｐLower joint pillar 100 ｑ Place it on the upper section 100 ｐ Column base (or lower column 100 ｑ The erection pieces 40 of the four pillars (capitals) are wrapped in the main body frames 50A of the four plumbing adjustment jigs 50, and the upper joint columns 100 ｐ Column base and lower column 100 ｑ Four sets of erection pieces 40 respectively protruding from the column heads are connected to each other by plumbing adjustment jigs 50.

[0030] In the next step S8, the misalignment of the columns is adjusted. ｑ Capital and upper column 100 ｐ This refers to the misalignment in the horizontal plane between the upper section column 100 and the base of the column. ｐ While hanging it with a crane, ｐ Lower joint pillar 100 ｑ When the upper joint column 100 is placed on the ｐ and lower column 100 ｑ This is done by adjusting the X-axis and Y-axis positions of the upper section column using four plumbing adjustment jigs 50 so that the weight of the columns appears to be one column. After this, the crane is released (Step S10). Note that if the weight of the columns is lighter than a predetermined value, it is also possible to release the crane before carrying out the misalignment adjustment.

[0031] In the next step S12, column inclination adjustment (also called re-plunging) is performed. This inclination adjustment is performed by measuring the inclination angle of the upper section column and adjusting the inclination angle of the upper section column using four plumbing adjustment jigs 50 so that the inclination error with respect to the vertical axis (Z-axis) falls within a predetermined tolerance. Here, plumbing refers to the degree to which the column is vertical. In the next step S14, the upper section column and the lower section column are fixed using the four plumbing adjustment jigs 50. This fixation is performed by temporarily tightening (lightly tightening) each adjustment bolt provided on the four plumbing adjustment jigs 50 using a dedicated tool. The processes in steps S2 to S14 above are performed sequentially (or partially in parallel) for multiple upper section columns (n-section columns).

[0032] Then, in the next step S16, beam insertion and remeasurement after beam insertion are performed. Here, beam insertion generally refers to placing a steel beam between two columns and connecting both ends of the steel beam to the two columns. In this embodiment, the steel beam (steel beam) used has a pair of beam end members 100a (see FIG. 6A ) located at both ends of the steel beam and joined to the columns 100, and a beam center member (not shown) whose one end and the other end are joined to the pair of beam end members 100a. Therefore, in this embodiment, beam insertion refers to placing a center member between two beam end members joined to two columns, respectively, and connecting the center member to each of the beam end members on both sides with beam joints. However, due to manufacturing errors that inevitably exist in the beam steel, during beam insertion, the inclination angle of the columns connected to both ends of the steel beam may change from before beam insertion due to horizontal forces acting on the columns connected to the beam steel. To confirm this change, it is necessary to remeasure the tilt angle information after inserting the beam.

[0033] In the next step S18, post-beam insertion readjustment is performed as necessary based on the results of the remeasurement. Post-beam insertion readjustment can include adjustment of column misalignment, column tilt, and column level. These are performed by readjusting the four plumbing adjustment jigs 50. However, column misalignment that cannot be sufficiently adjusted by readjusting the plumbing adjustment jig may be adjusted using a different adjustment jig. Also, for example, in column tilt readjustment, the column tilt angle is adjusted while measuring information on the column tilt angle, and it is confirmed that the tilt error is within a predetermined tolerance.

[0034] In the next step S20, the beam joints and column joints are tightened. The beam joints are tightened by tightening the high-strength bolts at the joints between the columns and beams, and the column joints are tightened by tightening the adjustment bolts of the four plumbing adjustment jigs 50. After this tightening, the upper section column 100 ｐThe tilt angle information of the pillar is measured (hereinafter referred to as tilt angle measurement where appropriate) to confirm that the tilt error is within a predetermined tolerance. Here, since the tilt error is adjusted to within the tolerance in the readjustment stage (step S18) described above, the tilt error of the pillar is usually within the tolerance. If the tilt error of the pillar is not within the tolerance, the tilt angle of the pillar is adjusted again, and then it is confirmed that the tilt error is within the tolerance. The management tolerance for pillar tilt is set to 1 / 1000 of the pillar length and 10 mm or less, so the tolerance should be set to satisfy this and has a certain range.

[0035] After a predetermined time has elapsed, the upper section 100 ｐ Lower joint pillar 100 ｑ After welding, the four plumbing adjustment jigs are removed (Step S22). After that, the erection piece is cut. Even after welding, the upper section column 100 is ｐ Here, since it has been confirmed in step S20 that the inclination error is within the tolerance, the inclination error of the column is usually within the tolerance. However, since a certain amount of time passes between the end of final tightening and the start of welding, the inclination angle of the upper section column 100 ｐ It is possible that the inclination error of the upper section column is not within the tolerance. In such cases, since welding has been completed, readjustment is no longer possible, but the inclination angle measurement results can be used. For example, based on the inclination angle measurement results, it is possible to set an offset to the target value for erecting the column capital of the upper section column (here, the (n+1)th section column) to cancel the inclination error (or its influence). Note that the inclination angle of the upper section column can be measured immediately before welding to check whether the inclination error is within the tolerance. If it is outside the tolerance, readjustment can be performed before welding.

[0036] Next, a description will be given of steel frame erection measurement using a sensor device, which is performed during the erection of an n-node column. ｉis used to measure the inclination angle of the upper section pillar in each of steps S12, S16, and S20 described above, and to measure and confirm the inclination angle of the upper section pillar after welding (step S22).

[0037] Fig. 5 shows a flow chart of the steel frame erection measurement. Fig. 6(A) to (C) show conceptual diagrams showing the flow of the steel frame erection measurement. Fig. 6(A) to (C) show an n-node column (hereinafter referred to as the target column) 100 to be measured. ｐ But the lower column 100 ｑ The target pillar 100 ｐ In advance (immediately after the target column is temporarily fixed in step S6 above, or before the target column is ground-breaking), a predetermined number of sensor devices 18 (for example, three on the +X side surface and three on the -Y side surface, a total of six) are installed at the mounting positions. １ ~18 ６ The mounting positions are marked in advance, and the positions of the marks are set in advance so that they coincide with the measurement positions of the target pillars managed by the server 12 after the target pillars are erected. １ and sensor device 18 ４ , sensor device 18 ２ and sensor device 18 ５ , sensor device 18 ３ and sensor device 18 ６ are attached at the same height. ｉ The marks may be attached only at any two or more attachment positions (mark positions) as long as the two positions include the two positions on the column capital. Alternatively, the marks may be provided at seven or more positions.

[0038] 5 will be described below with reference to other figures as appropriate. First, in step S102, the three-dimensional surveying instrument 30 ｊ , target pillar 100 ｐ The three-dimensional surveying instrument 30 is installed in a position where it is possible to measure the position information (information on the tilt angle in this case). １ The state after installation is shown.

[0039] In the next step S104, the three-dimensional surveying instrument 30 ｊ and sensor device 18 ｉ Target pillar 100 ｐ The parallel measurement of the inclination angle at the measurement points at the same height is performed by the respective sensor devices 18. ｉ (i=1 to 6) Sensor device 18 ｉ and 3D surveying equipment 30 ｊ The parallel measurement may be performed at least partially in parallel with the three-dimensional surveying instrument 30. １ and sensor device 18 ３ Target pillar 100 ｐ Although the parallel measurement of the tilt angle is shown as an example, other sensor devices 18 ｉ For (i=1, 2), the three-dimensional surveying instrument 30 １ Parallel measurement is performed in the same manner. ｉ (i=4, 5, 6) for parallel measurement with another 3D surveying instrument 30 ｊ (For example, a three-dimensional surveying instrument 30 ２ ) at an appropriate position in step S102. １ and sensor device 18 ３ (18 ２ , 18 １ ) using the target column 100 ｐ Parallel measurement of the tilt angle of the three-dimensional surveying instrument 30 ２ and sensor device 18 ６ (18 ５ , 18 ４ ) using the target column 100 ｐ The parallel measurement of the tilt angle can be performed in parallel. ｊ and sensor device 18 ｉ The measurement of the inclination angle at measurement points at the same height of the target pillar 100 by the three-dimensional surveying instrument 30 does not necessarily have to be performed in parallel in time. ｊ and sensor device 18 ｉAfter measurement by one of the two, measurement by the other may be performed after a short time interval during which the measurement value hardly changes.

[0040] In the next step S106, the sensor device 18 ｉ The tilt angle information acquired in step S104 is transmitted to the three-dimensional surveying instrument 30 used in the parallel measurement in step S104. ｊ Calibration information is calculated to match the tilt angle information obtained in step 1.

[0041] For example, a three-dimensional surveying instrument 30 １ The tilt angle (β １ , γ １ ) and sensor device 18 ３ (18 ２ , 18 １ ) obtained by the tilt angle (β ２ , γ ２ ) and then obtain calibration information (δθy, δθz) in the θy direction and the θz direction.

[0042] δθy=β ２ -β １ δθz = γ ２ -γ １ Also, for example, a three-dimensional surveying instrument 30 ２ The tilt angle α in the θx direction obtained １ and sensor device 18 ６ (18 ５ , 18 ４ ) The tilt angle α in the θx direction obtained ２ Based on this, calibration information δθx in the θx direction is calculated. δθx = α ２ -α １

[0043] The calculation of the calibration information in step S106 is performed by each of the sensor devices 18 ｉ Regarding the three-dimensional surveying equipment 30 used for parallel measurement ｊ However, the calibration information in the θz direction is based on the tilt angle acquired by the three-dimensional surveying instrument 30. ２ The tilt angle in the θz direction acquired by the sensor device 18 ６ (18 ５ , 18 ４In other words, it is sufficient to obtain the calibration information in the θz direction for only one of the sensor devices attached at the same height on the pillar.

[0044] Here, the sensor device 18 ３ (18 ２ , 18 １ The reason why the tilt angle in the θx direction for the sensor device 18 is not taken into consideration is that the sensor device 18 is located at the same height. ６ (18 ５ , 18 ４ ) is provided. Therefore, the sensor device 18 ３ , 18 ２ , 18 １ When only these three are attached to the pillar, the three-dimensional surveying instrument 30 ２ In parallel with the measurement of the inclination angle of the −Y side surface of the pillar by the sensor device 18 ３ (18 ２ , 18 １ ) may be used to measure the tilt angle of the pillar in the θx direction. In this case, the sensor device 18 ３ (18 ２ , 18 １ ) and the calibration information δθx is ２ The inclination angle α at the measurement point at the same height position １ In this way, it is sufficient to prepare three sensor devices for the target pillar.

[0045] Then, using the calculated calibration information, each sensor device 18 ｉ The measurement origin of the three-dimensional surveying instrument 30 used in the parallel measurement is ｊ In this embodiment, the calibration information is simply an offset, but the calibration information is not limited to this and may be managed as a correction coefficient.

[0046] Each time a measurement is performed, the origin of each sensor device 18 is reset. ｉ By using the calibration information, the three-dimensional surveying instrument 30 used in the parallel measurement can obtain the information on the tilt angle at each measurement point measured by theｊ In this specification, the term "parallel" does not only refer to a case where two types of operations (e.g., measurement operations) are performed almost simultaneously, but also includes a case where the operations are performed with at least a partial time difference, and a case where the two types of operations are performed consecutively (a case where the end point of one operation and the start point of the other operation are almost the same).

[0047] In any case, after the calibration information is calculated, the sensor device 18 ｉ Target column 100 ｐ By measuring the tilt angle at the measurement point, the three-dimensional surveying instrument 30 ｊ The target pillar 100 measured using ｐ After the calibration information is calculated, the tilt angle information at each of the three-dimensional surveying instruments 30 can be obtained. ｊ can be used for other measurement tasks.

[0048] In the next step S108, when the building is re-erected, each sensor device 18 ｉ Therefore, the target column 100 ｐ The tilt angle of each sensor device 18 is measured. ｉ The sensor data output from the sensor device 18 is acquired, and the information on the tilt angle at each measurement point is acquired. ｉ This is done by adjusting the plumbing adjustment jig 50 based on the information on the inclination angle obtained by measurement.

[0049] Thereafter, the above-mentioned re-measurement after the beam insertion is carried out (step S16). ｉ Therefore, the target column 100 ｐ The tilt angle of each sensor device 18 is measured. ｉ The sensor data output from the sensor is acquired, and information on the tilt angle at each measurement point is obtained.

[0050] Thereafter, necessary readjustments and final tightening of the beam joints and column joints are carried out (steps S18 and S20). After the final tightening, in step S112, the respective sensor devices 18ｉ Therefore, the target column 100 ｐ The tilt angle of each sensor device 18 is measured. ｉ The sensor data output from each sensor device 18 is acquired, and information on the tilt angle at each measurement point is obtained. ｉ Therefore, the target column 100 ｐ The figure shows the state in which the tilt angle measurement is being performed.

[0051] Then, the target column 100 ｐ After the welding (see step S22) is performed, in step S114, the respective sensor devices 18 ｉ Therefore, the target column 100 ｐ The tilt angle of each sensor device 18 is measured. ｉ The sensor data output from each sensor device 18 is acquired, and information on the tilt angle at each measurement point is obtained. ｉ Therefore, the target column 100 ｐ The figure shows the state in which the tilt angle measurement is being performed.

[0052] If, for some reason, the measurement result in step S114 (or the tilt error obtained based on it) does not fall within the allowable range, readjustment is no longer possible, as described above.

[0053] Under such circumstances, the target column 100 ｐ Let us consider the case where an upper column ((n+1) column) is added on top of the (n column). ｐ Sensor device 18 ｉ If the upper section column is still attached, the target column 100 ｐ At the time of stacking the sensor device 18 ｉ The target pillar 100 measured in real time by ｐ Based on the information on the inclination angle at each measurement point, a predetermined calculation (for example, a geometric calculation or a calculation using a predetermined function) is performed to calculate the target pillar 100 ｐBy calculating the amount of positional deviation of the column capital from the reference position (determined based on the results of the remeasurement mentioned above) in the X-axis and Y-axis directions (or in the north-south, east-west directions), an offset can be set to the target position for erecting the column capital of the upper section column.

[0054] On the other hand, the sensor device 18 ｉ Target pillar 100 ｐ When the upper section column is used for measuring the upper section column of the target column 100, ｐ Before stacking the sensor device 18 ｉ Target pillar 100 ｐ In such a case, it may be necessary to remove the target pillar 100 in real time. ｐ However, even in this case, the position and positional deviation of the column head cannot be measured. ｉ Target pillar 100 ｐ When the sensor is removed from the column, the offset of the target position for erecting the capital of the upper column can be set in the same way as in the case of real-time measurement described above, by using the information on the inclination angle at the measurement point of each sensor device immediately before removal.

[0055] On the other hand, the target column 100 ｐ (Lower column) to sensor device 18 ｉ If the target pillar 100 is removed too early, the immediately preceding measurement information cannot be obtained. ｐ From sensor device 18 ｉ If the sensor device 18 is removed early, ｉ Therefore, it becomes impossible to directly use the measurement information to set the offset.

[0056] Therefore, as a second best solution, the sensor device 18 is virtually calculated from other physical quantities related to the inclination angle of the steel column, etc. ｉ We consider a method for estimating the inclination angle of the lower section column measured by the method. As a result of the inventor's experiments, it was found that the change in the inclination of the steel column is closely related to temperature fluctuations.

[0057] Therefore, the sensor device 18 ｉThe relationship between the measured value of the tilt angle at the measurement point measured by the method and the temperature (t) is expressed as a function, in other words, the measured value is expressed as a function f(t) of temperature. Then, the sensor device 18 is used to calculate the tilt angle. ｉ Specifically, the following measurement information was calculated:

[0058] Each sensor device 18 ｉ Using the target column 100 ｐ The measurement data of the tilt angle at each measurement point and the measurement data of the temperature at the time of measurement are transmitted to the sensor device 18. ｉ The data were collected at predetermined sampling intervals for a predetermined time (e.g., 24 hours) before the sensor was removed, and the collected data were plotted on a two-dimensional coordinate system with temperature on the horizontal axis and tilt angle on the vertical axis. Then, a function f(t) was calculated for each measurement point of the sensor device, with the temperature t obtained by function fitting. Here, the average temperature (mean temperature) for the predetermined time was also calculated as the reference temperature T.

[0059] Then, the reference temperature T is substituted into the above function f(t) for each sensor device to calculate the temperature of the target column 100 at each measurement point. ｐ The inclination angles of the upper and lower section columns are estimated, and the estimated results are used to set an offset to the target position for erecting the capital of the upper section column in the same manner as in the case of the real-time measurement described above.

[0060] Here, the above offset is actually taken into consideration when adjusting the tilt of the upper node column (the (n+1) node column) in erection.

[0061] In this embodiment, the sensor device 18 ｉ The tilt angle and temperature are measured in parallel by the sensor device 18. ｉ Target pillar 100 ｐ Temperature measurements may be taken in parallel with the measurement of the inclination angle. It is known that the inclination angle of a steel column is related to physical quantities other than temperature, such as wind force (k), load from above (w), and ground vibration (g).

[0062] Therefore, a function with parameters of temperature (t) and at least one of wind force (k), load from above (w), and ground vibration (g) can be used instead of f(t). For example, a function with parameters of temperature (t), wind force (k), load from above (w), and ground vibration (g) can be expressed as f(t, k, w, g). A function of this type can be obtained by simulation or the like.

[0063] In addition, up until now, the steel frame with n (≧2) sections (n-section column) was used as the target column 100 ｐ However, the case where the first column is the target column and the sensor device 18 ｉ Therefore, for the target column (1st node column), the target column 100 ｐ In this case, if necessary, the offset of the second section column relative to the target position for erecting the column capital can be set in the same manner as described above, using the measurement data of the sensor device for the first section column.

[0064] Sensor device 18 related to the measurements described above ｉ , 3D surveying equipment 30 ｊ The processing of the output data (including calculations) is performed by the server 12, and the information necessary for adjusting the plumbing adjustment jig 50 is provided from the server 12 to the mobile terminal 16 carried by the on-site worker in response to an inquiry. That is, in this embodiment, the measurement system 10 can be considered to constitute a steel frame erection adjustment system based on the measurement results of the steel frame inclination angle, which includes the on-site worker's adjustment work of the plumbing adjustment jig as part of the adjustment work. Note that at least some of the functions of the server 12 may be provided in the on-site computer 14.

[0065] As described above, according to this embodiment, as shown in FIG. 6A, the three-dimensional surveying instrument 30 ｊ and sensor device 18 ｉ The parallel measurement of the inclination angle at the measurement points (measurement points) at the same height position of the target pillar 100 is performed by each sensor device 18 ｉ(i=1 to 6) (step S104), and the results of the parallel measurements are used to calculate the calibration information for each sensor device (step S106). ｉ When the origin reset is performed, the sensor device 18 ｉ Each time the tilt angle at a predetermined measurement point on the target pillar is measured, the three-dimensional surveying instrument 30 ｊ By using the sensor device 18, it is possible to obtain measurement data that is substantially the same as that obtained by measuring the inclination angle at a predetermined measurement point on the target pillar. ｉ After the calibration information is acquired, the origin of the sensor device 18 does not need to be reset. ｉ Each time the tilt angle at a predetermined measurement point on the target pillar is measured, the calibration information is used together with the measurement information from the sensor device, thereby ｊ Using this method, measurement data that is substantially the same as measuring the inclination angle at a specified measurement point on the target pillar can be obtained.

[0066] For this reason, for each steel column, in the stage of position adjustment (including misalignment adjustment and tilt adjustment) after temporary fixing, in order to acquire calibration information (or correction information), a three-dimensional surveying instrument 30 consisting of a total station or the like is used for parallel measurement with the sensor device. ｊ As a result, there is no need to carry out multiple surveying operations using surveying equipment such as a total station, such as the re-measurement stage after the beam is inserted, the final tightening of the column joints, and the welding of the upper and lower section columns.

[0067] In addition, the sensor device 18 is used in the re-measurement stage after the beam is inserted, the final tightening of the column joint, the welding of the column, etc. ｉ The tilt angle at a predetermined measurement point on the target pillar is measured by the above method, but the measurement data of this tilt angle contains almost no measurement error due to repeated measurements. The reason is that the sensor device remains fixed at a predetermined mounting position on the pillar, so repeated measurements do not cause measurement errors due to positional deviation of the sensor device. In addition, the sensor device always measures the amount of change in tilt angle from a reference point at any point in time, so the above-mentioned three-dimensional surveying instrument 30ｊ If the time of parallel measurement is taken as the reference time, then by using the above-mentioned calibration information calculated using the measurement results of the sensor device and 3D surveying equipment at that reference time, it becomes possible to obtain construction measurement results for each steel column that are substantially equivalent to those obtained when construction measurements are always performed using surveying equipment such as a total station.

[0068] Furthermore, as described above, this embodiment employs various offset setting methods that use measurement data measured by a sensor device in real time at the time of erection of the upper section column, or immediately before the upper section column is erected, or measurement data measured over a predetermined period of time after welding. Therefore, the offset set using these setting methods can be said to be an offset set based on information that more accurately reflects the actual positional deviation of the lower section column's capital at the time the upper section column is erected, compared to conventional offsets. This is because conventional offsets for the erection position of the upper section column were set by relying on the measurement results of the lower section column's inclination angle measured only once after welding using surveying equipment such as a total station.

[0069] In the above embodiment, the case where the column misalignment adjustment, tilt adjustment, level adjustment, etc. are performed using the plumbing adjustment jig 50 has been described, but this is not limited to this. The conventional plumbing method of fastening the column beam with temporary bolts, loosening the anchor bolts slightly, and then adjusting the wire with a lever block (registered trademark) or turnbuckle to make the column perpendicular may also be used. Even in this case, after the perpendicularity is achieved, the erection piece is clamped with a splice plate and tightened with a high-strength bolt, and welding is performed, so the erection measurement according to the above embodiment (FIGS. 5 and 6(A) to (C)) can be applied.

[0070] In the above embodiment, the construction of a steel-framed building, which is a type of architectural structure, is taken as an example of the construction of a structure, and a plurality of sensor devices 18 ｉ and a plurality of three-dimensional surveying instruments 30 ｊThe measurement method according to the present invention has been described as being applied to construction measurement using a measurement system 10 having the above-described components. However, the measurement method according to the present invention can be applied to structural materials of architectural structures (structures) during construction (construction), not limited to steel-frame construction. For example, ceilings, roofs, etc. can also be used as the target objects. The structures targeted by the measurement method according to the present invention are not limited to buildings, but can also include viaducts, bridges, dams, tunnels, stadiums, halls, etc. In short, the measurement method according to the present invention can be applied to any structure in which 3D surveying equipment is used for construction (construction). The target objects are not limited to structures, but can also be retaining walls, slopes, etc. Furthermore, the measurement method according to the present invention can be applied to parts of completed architectural structures (structures), such as columns, walls, ceilings, and roofs, as the target objects. In this case, the target objects are not limited to buildings, but can also be parts of structures such as viaducts, bridges, dams, tunnels, stadiums, and halls, or can also be retaining walls, slopes, etc.

[0071] In the above embodiment, the three-dimensional surveying instrument 30 ｊ information on the inclination angle at the measurement point of the pillar as a structural member measured by the sensor device 18 (first position information); ｉ and matching the second position information with the first position information based on the measurement result of the tilt angle information (second position information) at the measurement point of the pillar measured by the sensor device 18. ｉ The case where calibration information for the measurement information of the sensor device 18 is obtained has been described. ｉ The calibration information of the measurement information is not limited to calibration information that matches the second position information with the first position information. The calibration information may be information that indicates a certain relationship between the position information measured by the sensor device and the position information measured by the three-dimensional surveying instrument, and may be a coefficient that indicates the relationship between the first position information measured by the three-dimensional surveying instrument and the second position information measured by the sensor device. By using the calibration information to correct the second position information measured by the sensor device, it is sufficient to bring the corrected position information closer to the position information measured by the three-dimensional surveying instrument.

[0072] In the above embodiment, the sensor device 18 ｉ and 3D surveying equipment 30ｊ In this way, the inclination angle is measured at the measurement point at the same height position of the target pillar 100. ｉ and 3D surveying equipment 30 ｊ In this case, the measurement points of the sensor devices 18 are different from each other. ｉ and 3D surveying equipment 30 ｊ and 3D surveying equipment 30 may measure position information (inclination angle information) at multiple points on the target column 100, calculate an approximate curve representing the inclination of the target column (steel frame) from the measurement results, and obtain calibration information for the measurement information of the sensor device relating to the height direction of the steel frame from the calculated approximate curve. ｊ The position information (inclination angle information) at each of a plurality of points that are different in the height direction on a predetermined surface (hereinafter referred to as the measurement surface) of the target pillar 100 is measured using a plurality of sensor devices 18 that have been pre-calibrated so that the measurement values ​​match each other. ｉ Then, the three-dimensional surveying instrument 30 ｊ The information on the inclination angles at each of the multiple points measured using the function fitting is then fitted to a polynomial function f with the height z as a parameter, which represents an approximate curve showing the inclination of each point in the height direction on the measurement surface of the target pillar 100. １ (z). At the same time, the plurality of sensor devices 18 ｉ The information on the inclination angles at each of the multiple points measured in the above is fitted with a function to obtain a polynomial function f with the height z as a parameter, which represents an approximate curve showing the inclination of each point in the height direction on the measurement surface of the target pillar 100. ２ (z) is calculated. Then, the polynomial function f １ (z) and the polynomial function f ２ (z), the sensor device 18 measures each point in the height direction on the measurement surface of the target pillar 100 as a measurement point. ｉ The measurement information is transmitted to the three-dimensional surveying instrument 30 ｊ It is also possible to obtain calibration information that approximates the measurement information at a point at the same height position on a predetermined surface of the target pillar 100 by the sensor device 18.ｉ The measurement information is transmitted to the three-dimensional surveying instrument 30. ｊ The calibration information for substantially matching the measurement information of the sensor device 18 ｉ The value of the height z of the measurement point is expressed by the polynomial function f １ (z), f ２ (z) and obtain the difference between the two tilt angle information obtained by substituting the polynomial function f ２ (z) Sensor device 18 ｉ The tilt angle information obtained by substituting the value of the height z of the measurement point is ｉ Since the measurement information substantially matches the measurement information of any sensor device 18 ｉ The measurement information is transmitted to the three-dimensional surveying instrument 30. ｊ To obtain calibration information that substantially matches the measurement information of １ (z). Therefore, the polynomial function f ２ (z) does not necessarily have to be found.

[0073] In the above explanation, the polynomial function f ２ As a premise for calculating (z), a plurality of sensor devices 18 that have been calibrated in advance so that the measurement values ​​match are used. ｉ The position information (inclination angle information) is measured at each of a plurality of points that are different in height direction on the measurement surface of the target pillar 100. ｉ may be moved to measure position information (inclination angle information) at each of multiple points that are located at different positions in the height direction on a predetermined surface of the target pillar 100. As is clear from the above explanation of the acquisition of calibration information using a polynomial function, the calibration information may be information that includes a function.

[0074] In the above description, the sensor device 18 ｉ The case where three sensor devices are arranged in the vertical direction on the measurement surface has been described. ｉ In particular, when the measurement surface of the object is a three-dimensional curved surface, the sensor devices may be arranged two-dimensionally on the measurement surface. However, in reality, the sensor devices 18 ｉSince the 3D surveying instrument 30 outputs the tilt angle (three-dimensional tilt angle) of the normal vector of the measurement surface, it is possible to derive the shape (surface shape) of the measurement surface of the object from the measurement values ​​of the measurement point coordinates and normal vectors. For example, the shape can be calculated by determining the height (shift amount, lateral displacement amount) of each measurement point relative to a reference surface using the surface slope of each measurement point and its first-order integral. Alternatively, the shape of the object can be calculated based on a function obtained by fitting a function to slope distribution data obtained from multiple data sets for the same object obtained by measurement and converting it into an integral system. Examples of fitting functions that can be used include differential Zernike functions. The shape can also be calculated by optimizing the order and coefficients of an approximated surface expressed by Fourier series expansion using the actual measured values ​​of the coordinates and normal vectors of a finite number of discrete measurement points on the measurement surface of the object so that the error at each measurement point is minimized. In addition, various methods using various functions can be used as long as the shape can be calculated using the tilt angles at multiple measurement points. ｊ When the shape of the measurement surface is obtained using the sensor device 18 ｉ Similarly to the case of (1), by arranging a plurality of measurement points two-dimensionally on the measurement surface, the shape of the measurement surface can be similarly obtained using the position information obtained at each measurement point.

[0075] That is, the information calculated from the position information measured by the sensor device is not limited to the inclination of the pillar (one-dimensional inclination information), but may also be two-dimensional information such as surface shape. In the above embodiment, the correspondence between the measurement information of the three-dimensional surveying instrument and the sensor device is performed using the inclination angle, but the lateral deviation (shift amount) may be calculated from the inclination angle obtained for each measurement point, and this shift amount may be used to calculate and manage calibration information.

[0076] The server 12 constituting the measurement system 10 may be under the control of a user of the sensor device, such as a construction company. Alternatively, in cases where the sensor device is leased (or rented) from a supply company (manufacturer, supplier, etc.) to a construction company, the server 12 may be under the control of the supply company.

[0077] 18 ｉ (18１ , 18 ２ , 18 ３ , 18 ４ , 18 ５ , 18 ６ )...sensor device, 30 ｊ (30 １ , 30 ２ )…3D surveying equipment, 100 ｐ ...pillar.

Claims

1. A measurement method for measuring a structural material of a structure, comprising the steps of: measuring position information of the structural member using a three-dimensional surveying instrument and a sensor device attached to the structural member; and acquiring calibration information for calibrating the measurement information of the sensor device based on measurement results of position information of both the three-dimensional surveying instrument and the sensor device.

2. 2. The measurement method according to claim 1, The measurement method further includes, after obtaining the calibration information, measuring position information of the structural material using information measured by the sensor device and the calibration information.

3. 3. The measurement method according to claim 2, A measuring method in which the position information is measured at a plurality of points and the shape information of the structural material is obtained using the measurement results.

4. The measurement method according to claim 3, A measuring method, wherein the sensor device used to measure the position information includes a sensor that measures angle information.

5. The measurement method according to claim 4, The sensor measures an angle relative to the direction of gravity as the angle information.

6. The measurement method according to claim 4, A measurement method in which a lateral shift of a measurement point of the sensor device is calculated from the angle information, and the calculated lateral shift is used to obtain the shape information of the structural material.

7. 2. The measurement method according to claim 1, In the measuring, the three-dimensional surveying instrument and the sensor device each measure position information of the structural material at a plurality of points; The acquiring step acquires the calibration information based on position information at a plurality of points on the structural material measured by the three-dimensional surveying instrument and the sensor device, respectively.

8. 2. The measurement method according to claim 1, In the measuring, the three-dimensional surveying instrument and the sensor device measure position information at measurement points set on the structural material, respectively; The acquiring step acquires the calibration information based on position information at the measurement point measured by the three-dimensional surveying instrument and the sensor device, respectively.

9. The measurement method according to claim 7, After the calibration information is acquired, position information of the structural material is measured by the sensor device, and the measured position information substantially calibrated with the calibration information is used as the measurement result.

10. The measurement method according to any one of claims 1 to 9, A measuring method in which the position information measured by the sensor device includes information on an inclination angle of the structural material with respect to a direction of gravity.

11. The measurement method according to any one of claims 1 to 9, A measurement method in which the object is a structural material of a completed structure.

12. The measurement method according to any one of claims 1 to 9, A measurement method in which the target object is a structural material of a structure under construction.

13. A method for constructing a structure utilizing the measurement method according to claim 12, comprising the steps of: A method for constructing a structure, in which a pillar to be erected is used as the target object, and inclination angle information at a predetermined measurement point is measured using the sensor device and the three-dimensional surveying instrument, and based on the measurement results, calibration information is obtained to match the inclination angle information measured by the sensor device with the inclination angle information measured by the three-dimensional surveying instrument.

14. 14. A method for constructing a structure according to claim 13, comprising the steps of: A method for constructing a structure, wherein the measurement of the tilt angle information by the sensor device and the three-dimensional surveying instrument is performed in parallel.

15. 14. A method for constructing a structure according to claim 13, comprising the steps of: The method further includes, after acquiring the calibration information, resetting the origin of the sensor device by using the calibration information to match the measurement origin of the sensor device with the measurement origin of the three-dimensional surveying instrument; A method for constructing a structure, wherein after the origin is reset, the inclination angle of the pillar is measured by the sensor device after the origin is reset.

16. 14. A method for constructing a structure according to claim 13, comprising the steps of: The column to be erected is a column at any node after the second node, A method for constructing a structure, in which the measurement of the inclination angle information using the sensor device and the three-dimensional surveying instrument to obtain the calibration information is performed at any timing during position adjustment, including misalignment adjustment and tilt adjustment, for the column of any node.

17. 17. A method for constructing a structure according to claim 16, comprising the steps of: The method for constructing a structure is a steel-framed structure using steel frames as structural materials.

18. 18. A method for constructing a structure according to claim 17, comprising the steps of: A method for constructing a structure, in which the sensor device measures inclination angle information for a column at any node as an object at least one of the following times: after obtaining the calibration information, when re-measuring after inserting a beam, after fully tightening a column joint, and after welding a column.

19. A method for constructing a structure including a multi-section column, comprising the steps of: A method for constructing a structure, comprising: setting an offset to a target erection value of the head of a column at an upper section based on information on the inclination angle at a measurement point of a column to be measured, measured by a sensor device attached to the column to be measured during or immediately before the erection of the upper section of the column to be measured.

20. A method for constructing a structure including a multi-section column, comprising the steps of: After completion of welding of the measurement target pillar to which the sensor device is attached, and prior to erecting the upper section of the measurement target pillar, measuring information on the inclination angle of the measurement target pillar at a predetermined sampling interval for a predetermined time by the sensor device and measuring a temperature t in parallel; determining a function f representing information on the tilt angle acquired by the sensor device, the function f including the temperature t as a parameter, based on sampling data acquired by measurement; A method for constructing a structure, comprising: setting an offset for a target value for erecting the capital of the upper section column based on the function f in which a reference temperature T is substituted for the parameter t.

21. 21. A method for constructing a structure according to claim 20, comprising the steps of: The sensor device includes a temperature sensor. A method for constructing a structure, wherein the temperature t is measured using the temperature sensor.