Ground anchor rotary cable single-tower single-span suspension bridge reference cable strand shape measuring device and method

Abstract

The invention relates to the field of suspension bridge construction, and discloses a ground anchor rotary cable single-tower single-span suspension bridge reference cable strand linear measurement device and method, and the measurement method comprises the steps: installing a prism tool at a reference cable strand span midpoint; a start button of a rotating motor of the upper mirror is pressed down; a control instruction is sent to the control module; the control module sends a starting instruction to a rotating motor of the upper mirror, so that the upper mirror is back to the total station; the total station acquires three-dimensional coordinates of the lower mirror; controlling the upper mirror to face the total station and controlling the lower mirror to face back to the total station; acquiring three-dimensional coordinates of the upper mirror; the calculation unit calculates the three-dimensional coordinates of the center of the reference cable strand; and the display terminal displays the three-dimensional coordinates of the center of the reference cable strand. The technical problems that in the prior art, a measurer needs to manually turn over the prism during measurement, the physical strength and time of the measurer are consumed, and the measurement efficiency is low are solved, remote control over turning over of the prism is achieved, the measurement efficiency is improved, and the number configuration of technicians is reduced.

Description

Technical Field

[0001] The present application relates to the field of suspension bridge construction, and in particular to a device and method for measuring the linear shape of a reference cable strand of a single-tower single-span suspension bridge with a ground-anchored rotary cable. Background Art

[0002] Suspension bridges are divided into single-span, two-span, three-span and multi-tower multi-span suspension bridges according to the number of suspended spans. Among them, single-tower single-span suspension bridges are suitable for structures where the side spans are higher than the ground and the side spans are supported by piers.

[0003] Ground anchors are anchors buried underground to resist tension, and slewing cables are cables that rotate around an axis within a certain range. The application of ground anchors, slewing cables, and single-tower single-span suspension bridges allows the bridge deck to rotate when encountering terrain changes, thereby adapting to the natural curve of the terrain, reducing interference with the environment, and maintaining the overall stability and functionality of the bridge. Especially in complex terrains such as mountainous areas or river bends, the design of slewing cables is crucial to the flexibility and adaptability of the bridge.

[0004] There are hundreds of cables in the main cable of a single-tower, single-span suspension bridge with an anchored slewing cable, one of which is a reference cable and the rest are general cables. During the main cable installation process, the reference cable is first installed to the preset line shape, and the general cable is adjusted vertically with reference to the reference cable, so that hundreds of cables in the main cable can be accurately installed. Therefore, the measurement and monitoring of the reference cable line shape determines the construction accuracy of the main cable and even the entire bridge.

[0005] The measurement method of the reference cable strand linear shape is generally as follows: first install a prism fixture at the midpoint of the reference cable strand span. The prism fixture includes prisms located above and below the reference cable strand span. Both prisms can be measured by the total station on the shore, and the three-dimensional coordinates of the upper and lower prisms can be obtained, so that the three-dimensional coordinates of the center of the reference cable strand can be calculated. The monitoring and calculation group calculates the sag in the mid-span of the reference cable strand based on the span, tower height, and temperature correction, and then the reference cable strand linear shape data can be obtained.

[0006] However, in the process of implementing relevant technical solutions, at least the following technical problems were found: since there are two upper and lower prisms in the prism tooling on the mid-span of the benchmark cable strand, when the total station measures one of the prisms, the other prism needs to be flipped and the prism needs to face away from the total station so that the measured prism can accurately obtain the measurement value during the measurement. Therefore, a surveyor is required to stand on the catwalk under the main cable to flip the prism on the prism tooling during measurement. The measurement is generally carried out at night, when it is cold and the measurement time is long. The current measurement method consumes the physical strength and time of the surveyor and has low measurement efficiency. Summary of the invention

[0007] The present application provides a device and method for measuring the linear shape of the reference cable strand of a single-tower single-span suspension bridge with an anchored rotary cable, thereby solving the technical problem in the prior art that the surveying personnel are required to manually flip the prism on the prism tooling during measurement, which consumes a lot of physical strength and time of the surveying personnel and results in low measurement efficiency. The application realizes remote control of the flipping of the prism, reduces the number of technical personnel configured, and improves measurement efficiency.

[0008] The present application provides a device for measuring the linear shape of a reference cable strand of a single-tower single-span suspension bridge with an anchored rotary cable, comprising: a prism fixture, fixedly mounted at the midpoint of the span of the reference cable strand, the prism fixture comprising a rotary motor for driving the prism to rotate; a control module, mounted on the prism fixture and used to control the rotation of the rotary motor; a total station, used to measure the prism on the prism fixture; a wireless data transmission module, used to acquire and transmit three-dimensional data measured by the total station; a calculation unit, including a calculation program for calculating the three-dimensional coordinates of the center of the reference cable strand based on the three-dimensional prism data; and a display terminal, used to display data information, the display terminal being provided with a control button for the rotary motor.

[0009] Furthermore, the prism tooling includes: a hexagonal clamp for clamping on the reference rope strand; two mirror rods, which are provided and fixedly installed on the upper and lower outer walls of the hexagonal clamp respectively; a rotating motor, the ends of the two mirror rods are equipped with the rotating motor, and the rotating motor is controlled by the control module; an upper mirror, which is fixed on the rotating shaft of the rotating motor above the hexagonal clamp; and a lower mirror, which is fixed on the rotating shaft of the rotating motor below the hexagonal clamp.

[0010] The present application also provides a method for measuring the linear shape of a reference cable strand of a single-tower single-span suspension bridge with an anchored rotary cable, using any of the above-mentioned devices for measuring the linear shape of a reference cable strand of a single-tower single-span suspension bridge with an anchored rotary cable, and the measuring method comprises: fixing a prism tooling at the midpoint of the span of the reference cable strand; pressing a start button of a rotating motor of an upper mirror on a display terminal; a wireless data transmission module sends a control instruction of the rotating motor of the upper mirror to a control module; the control module sends a start instruction to the rotating motor of the upper mirror, and the rotating motor drives the upper mirror to flip so that the upper mirror faces away from the total station; the total station measures the lower mirror, and obtains Take out the three-dimensional coordinates of the lower mirror; press the start button of the rotating motor of the upper mirror on the display terminal to make the upper mirror face the total station; press the start button of the rotating motor of the lower mirror on the display terminal to make the lower mirror face away from the total station; the total station measures the upper mirror to obtain the three-dimensional coordinates of the upper mirror; the wireless data transmission module transmits the three-dimensional coordinates of the upper mirror and the three-dimensional coordinates of the lower mirror to the calculation unit; the calculation unit calculates the three-dimensional coordinates of the center of the reference cable according to the three-dimensional coordinates of the upper mirror and the three-dimensional coordinates of the lower mirror; the display terminal obtains the three-dimensional coordinates of the center of the reference cable and displays the three-dimensional coordinates.

[0011] Furthermore, two total stations were used to measure simultaneously from different directions to perform trigonometric height measurement on the prism.

[0012] Furthermore, the wireless data transmission module is 5G transmission.

[0013] Furthermore, the physical button area on the display terminal is provided with an electronic knob for adjusting the rotation of the rotary motor.

[0014] Furthermore, the display area on the display terminal has three-dimensional coordinate information of the upper mirror returning to the left disk and the right disk, three-dimensional coordinate information of the lower mirror returning to the left disk and the right disk, three-dimensional coordinate information of known construction points, station construction information and parameter setting information, wherein the parameter setting information includes temperature, air pressure, humidity, number of measurements, limit error, and point definition.

[0015] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0016] Due to the use of the prism tooling, when it is necessary to measure the upper mirror, the lower mirror motor start button on the operation display terminal is pressed, and the control module controls the rotation motor on the lower mirror to start, and the lower mirror is flipped so that the lower mirror faces away from the total station, thereby reducing the impact on the measured upper mirror. Conversely, when it is necessary to measure the lower mirror, the upper mirror is flipped. Therefore, the flipping of the upper and lower mirrors is remotely controlled, and there is no need for the surveyor to climb onto the catwalk for manual flipping, which reduces the number of technicians and improves the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a reference cable strand linear shape measuring device for a single-tower single-span suspension bridge with a ground-anchored rotary cable in an embodiment of the present application;

[0018] Figure 2 This is a partial schematic diagram of a reference cable strand in an embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the structure of the prism tooling in the embodiment of the present application;

[0020] Figure 4 It is a schematic flow chart of a method for measuring the standard cable strand linear shape of a single-tower single-span suspension bridge with a ground-anchored rotary cable in an embodiment of the present application;

[0021] Figure 5 This is a schematic diagram of the interface of the display terminal in the embodiment of the present application;

[0022] Figure 6 This is another interface diagram of the display terminal in the embodiment of the present application;

[0023] In the figure: 1. prism tooling; 11. hexagonal fixture; 111. upper fixture; 112. lower fixture; 12. mirror rod; 13. rotating motor; 14. upper mirror; 15. lower mirror; 2. control module; 3. total station; 4. wireless data transmission module; 5. computing unit; 6. display terminal; 100. benchmark cable. DETAILED DESCRIPTION

[0024] In order to better understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The present application provides a device for measuring the standard cable strand shape of a single-tower single-span suspension bridge with a ground anchor rotary cable. Figure 1 As shown, the measuring device includes a prism tool 1, a control module 2, a total station 3, a wireless data transmission module 4, a calculation unit 5 and a display terminal 6. The prism tool 1 is fixedly installed at the mid-span point of the reference cable strand 100, the control module 2 is installed on the prism tool 1, the total station 3 is located at a preset observation point, the display terminal 6 can be a display screen in the control room, or a handheld tablet, which can improve the convenience and operability of on-site measurement operations, the calculation unit 5 is provided with a calculation program for calculating the three-dimensional coordinates of the center of the reference cable strand, the calculation unit 5 can be built in the handheld tablet, or built in the computer in the control room, the wireless data transmission module 4 can perform data transmission according to data transmission requirements, and the wireless data transmission module 4 can be 5G transmission, 4G transmission, Bluetooth transmission, etc.

[0026] Reference Figure 2 In a specific implementation, the reference strand 100 may be composed of 127 high-strength galvanized-aluminum steel wires, and each steel wire may have a diameter of 5.3 mm and a tensile strength of 1960 MPa.

[0027] Reference Figure 3The prism fixture 1 includes a hexagonal fixture 11, a mirror rod, a rotating motor 13, an upper mirror 14 and a lower mirror 15. The hexagonal fixture 11 includes an upper fixture 111 and a lower fixture 112. The upper fixture 111 and the lower fixture 112 can be connected by connecting bolts. The inner cavity formed by the combination of the upper fixture 111 and the lower fixture 112 is a hexagon, so that the inner cavity surface of the hexagonal fixture 11 can be effectively fitted to the outer surface of the reference cable strand 100. Two mirror rods 12 are provided, and the lengths of the two mirror rods 12 are the same. One mirror rod 12 is fixed on the outer wall of the upper fixture 111, and the other mirror rod 12 is fixed on the outer wall of the lower fixture 112. The axes of the two mirror rods 12 after the upper fixture 111 and the lower fixture 112 are combined are collinear. In addition, the control module 2 can be fixedly installed on one of the mirror rods 12. Two rotary motors 13 are provided, one of which is fixed to the end of one mirror rod 12 away from one end of the clamp, and the other is fixed to the end of the other mirror rod 12 away from one end of the clamp, and the axis of the output shaft of the rotary motor 13 is colinear with the axis of the mirror rod 12. The start and stop of the two rotary motors 13 are controlled by the control module 2, and the start and stop control instructions of the rotary motor 13 are generated by the control button on the display terminal 6, and the generated control instructions are transmitted by the wireless data transmission module 4. The upper mirror 14 is fixed to the output shaft of the rotary motor 13 on the upper clamp 111, and the lower mirror 15 is fixed to the output shaft of the rotary motor 13 on the lower clamp 112. Both the upper mirror 14 and the lower mirror 15 can be observed by the total station 3.

[0028] When installing the prism fixture 1, firstly, the upper fixture 111 with the upper mirror 14 is attached to the upper surface of the reference cable strand 100 at the mid-span point, and then the lower fixture 112 with the lower mirror 15 is attached to the lower surface of the reference cable strand 100 at the mid-span point, and then the upper fixture 111 and the lower fixture 112 are fixedly connected by connecting bolts, thereby completing the fixing of the prism fixture 1 to the mid-span point of the reference cable strand 100.

[0029] The functional principle can be explained by the following operation mode:

[0030] When the total station 3 measures the three-dimensional coordinate data of the upper mirror 14 and the lower mirror 15 on the prism fixture 1 respectively, it is necessary to flip the other prism over so that it is away from the total station 3 to reduce the interference with the measured prism. Therefore, when it is necessary to measure the upper mirror 14, the motor start button of the lower mirror 15 on the operation display terminal 6 is operated, and the wireless data transmission module 4 transmits the start instruction to the control module 2 of the prism fixture 1. The control module 2 controls the rotation motor 13 on the lower mirror 15 to start, and the lower mirror 15 is flipped so that the lower mirror 15 is facing away from the total station 3, thereby reducing the impact on the measured upper mirror 14. Conversely, when it is necessary to measure the lower mirror 15, the upper mirror 14 is flipped. Therefore, the flipping of the upper mirror 14 and the lower mirror 15 is remotely controlled, and there is no need for the measurement personnel to climb onto the catwalk to perform manual flipping, which reduces the number of technical personnel and improves the measurement efficiency.

[0031] The present application also provides a method for measuring the linear shape of a reference cable strand of a single-tower single-span suspension bridge with a ground anchor rotary cable. The measuring method uses the above-mentioned measuring device, referring to Figure 4 As shown, the measurement method includes the following steps:

[0032] S101, installation of prism tooling.

[0033] In a specific implementation, the upper fixture 111 with the upper mirror 14 is firstly attached to the upper surface of the reference cable strand 100 at the mid-span point, and then the lower fixture 112 with the lower mirror 15 is attached to the lower surface of the reference cable strand 100 at the mid-span point, and then the upper fixture 111 and the lower fixture 112 are fixedly connected by connecting bolts, thereby completing the fixing of the prism tooling 1 at the mid-span point of the reference cable strand 100.

[0034] S102, generating an upper mirror rotation motor start instruction.

[0035] In a specific implementation, the physical button area on the display terminal 6 is provided with electronic knobs for adjusting the rotation of the rotating motor 13 of the upper mirror 14 and the lower mirror 15. Therefore, the start button of the rotating motor 13 of the upper mirror 14 can be pressed on the display terminal 6. When the start button is pressed, a start instruction for the rotating motor 13 will be generated.

[0036] In the specific implementation, Figure 5 and Figure 6 As shown, the display area on the display terminal 6 has the three-dimensional coordinate information of the upper mirror 14 returning to the left disk and the right disk, the three-dimensional coordinate information of the lower mirror 15 returning to the left disk and the right disk, the three-dimensional coordinate information of the known construction points, the station construction information and the parameter setting information, wherein the parameter setting information includes the temperature, air pressure, humidity, number of measurements, limit error, point definition and the like.

[0037] In a specific implementation, the display terminal 6 can be a handheld tablet or a display screen in a control room. The handheld tablet can improve the convenience and operability of on-site measurement operations. The computing unit 5 can be built into the handheld tablet or into a computer in the control room.

[0038] S103, transmitting an upper mirror rotation motor start instruction.

[0039] In a specific implementation, the wireless data transmission module 4 is used to transmit the start instruction of the upper mirror 14 rotating motor 13 to the control module 2 of the prism tooling 1, and the instruction is received by the receiving end of the control module 2.

[0040] In a specific implementation, the wireless data transmission module 4 can be 5G transmission, 4G transmission, Bluetooth transmission, etc., and the data transmission method is selected according to the needs and construction environment.

[0041] S104, flip the upper mirror and turn it back to the total station.

[0042] In a specific implementation, the output end of the control module 2 sends a start instruction of the upper mirror 14 rotation motor 13 to the rotation motor 13 of the upper mirror 14, and the rotation motor 13 is started to drive the upper mirror 14 to flip, and finally the upper mirror 14 can face away from the total station 3.

[0043] S105, measuring and acquiring the three-dimensional coordinates of the lower mirror.

[0044] In a specific implementation, a trigonometric height measurement method is used to measure the lower mirror 15. The trigonometric height measurement method is to use two total stations 3 in different orientations to measure the lower mirror 15. Multiple measurements can be performed to obtain multiple sets of data.

[0045] S106, flip the upper mirror and point it toward the total station.

[0046] In a specific implementation, after the lower mirror 15 completes the measurement, the upper mirror 14 is returned to its original position so that the upper mirror 14 faces the total station 3 .

[0047] S107, flip the lower mirror and face away from the total station.

[0048] In a specific implementation, a start button of the rotating motor 13 of the lower mirror 15 is pressed on the display terminal 6. When the start button is pressed, a start instruction of the rotating motor 13 is generated. The start instruction of the rotating motor 13 of the lower mirror 15 is transmitted by the wireless data transmission module 4 and transmitted to the control module 2 of the prism tooling 1. The receiving end of the control module 2 receives the instruction, and the output end of the control module 2 sends the start instruction of the rotating motor 13 of the lower mirror 15 to the rotating motor 13 of the lower mirror 15. The rotating motor 13 is started, driving the lower mirror 15 to flip, and finally the lower mirror 15 can be flipped and face away from the total station 3.

[0049] S108, measuring and acquiring the three-dimensional coordinates of the mirror.

[0050] In a specific implementation, a trigonometric height measurement method is used to measure the lower mirror 15. The trigonometric height measurement method is to use two total stations 3 in different orientations to measure the lower mirror 15. Multiple measurements can be performed to obtain multiple sets of data.

[0051] S109, sending the three-dimensional coordinates of the upper mirror and the lower mirror.

[0052] In a specific implementation, the wireless data transmission module 4 is used to transmit the three-dimensional coordinates of the upper mirror 14 and the three-dimensional coordinates of the lower mirror 15 to the calculation unit 5 .

[0053] S110, calculating the three-dimensional coordinates of the center of the reference cable strand.

[0054] In a specific implementation, the calculation unit 5 includes calculation programs for different construction projects, including a calculation program for calculating the three-dimensional coordinates of the center of the reference cable strand according to the three-dimensional data of the prism, and calculating the three-dimensional coordinates of the center of the reference cable strand 100 according to the three-dimensional coordinates of the upper mirror 14 and the three-dimensional coordinates of the lower mirror 15.

[0055] S111, displaying the three-dimensional coordinates of the center of the reference cable strand.

[0056] In a specific implementation, the display terminal 6 obtains the three-dimensional coordinates of the center of the reference cable strand 100 , and displays the three-dimensional coordinates of the center of the reference cable strand 100 in a data display area of ​​the display terminal 6 .

[0057] In a specific implementation, the display terminal 6 can be a handheld tablet or a display screen in a control room. The handheld tablet can improve the convenience and operability of on-site measurement operations. The calculation unit 5 can be built into the handheld tablet or built into a computer in the control room. The calculation unit 5 built into the handheld tablet can perform calculations in real time at the measurement site and obtain the three-dimensional coordinates of the center of the reference cable strand 100 on site.

[0058] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0059] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A device for measuring the standard cable strand shape of a single-tower single-span suspension bridge with a ground-anchored rotary cable, characterized in that: include: A prism fixture (1) is fixedly mounted at the mid-span of the reference cable strand, and the prism fixture (1) comprises a rotary motor (13) for driving the prism to rotate; A control module (2) is mounted on the prism tooling (1) and is used to control the rotation of the rotation motor (13); A total station (3) for measuring the prism on the prism tooling (1); A wireless data transmission module (4) is used to acquire and transmit three-dimensional data measured by the total station (2); A calculation unit (5), comprising a calculation program for calculating the three-dimensional coordinates of the center of the reference cable strand according to the three-dimensional data of the prism; The display terminal (6) is used to display data information, and the display terminal (6) is provided with a control button for the rotary motor (13).

2. The device for measuring the standard cable strand shape of a single-tower single-span suspension bridge with a ground-anchored rotary cable as claimed in claim 1, characterized in that: The prism tool (1) comprises: A hexagonal clamp (11) for clamping onto the reference cable strand; Two mirror rods (12) are provided and are respectively fixedly mounted on the upper and lower outer walls of the hexagonal fixture (11); A rotating motor (13), the ends of the two mirror rods (12) are both equipped with the rotating motor (13), and the rotating motor (13) is controlled by the control module (2); An upper mirror (14) is fixed on the rotating shaft of the rotating motor (13) above the hexagonal fixture (11); The lower mirror (15) is fixed on the rotating shaft of the rotating motor (13) below the hexagonal fixture (11).

3. A method for measuring the standard cable strand linear shape of a single-tower single-span suspension bridge with an anchored rotary cable, characterized in that: Using the reference cable strand linear shape measuring device for a single-tower single-span suspension bridge with an anchored rotary cable as claimed in any one of claims 1 to 2, the measuring method comprises: The prism fixture (1) is fixedly installed at the mid-span point of the reference cable strand; Pressing a start button of a rotating motor (13) of an upper mirror (14) on a display terminal (6); The wireless data transmission module (4) sends a control instruction for the rotation motor (13) of the upper mirror (14) to the control module (2); The control module (2) sends a start command to the rotation motor (13) of the upper mirror (14), and the rotation motor (13) drives the upper mirror (14) to flip, so that the upper mirror (14) faces away from the total station (3); The total station (3) measures the lower mirror (15) to obtain the three-dimensional coordinates of the lower mirror (15); Pressing a start button of a rotating motor (13) of an upper mirror (14) on a display terminal (6) causes the upper mirror (14) to face the total station (3); Pressing a start button of the rotary motor (13) of the lower mirror (15) on the display terminal (6) causes the lower mirror (15) to face away from the total station (3); The total station (3) measures the upper mirror (14) to obtain the three-dimensional coordinates of the upper mirror (14); The wireless data transmission module (4) transmits the three-dimensional coordinates of the upper mirror (14) and the three-dimensional coordinates of the lower mirror (15) to the calculation unit (5); The calculation unit (5) calculates the three-dimensional coordinates of the center of the reference cable strand according to the three-dimensional coordinates of the upper mirror (14) and the three-dimensional coordinates of the lower mirror (15); The display terminal (6) obtains the three-dimensional coordinates of the center of the reference cable strand and displays the three-dimensional coordinates.

4. The method for measuring the standard cable strand linear shape of a single-tower single-span suspension bridge of an anchored rotary cable as claimed in claim 3, characterized in that: Two total stations (3) are used to measure simultaneously from different directions to perform trigonometric height measurement on the prism.

5. The method for measuring the standard cable strand linear shape of a single-tower single-span suspension bridge of an anchored rotary cable as claimed in claim 3, characterized in that: The wireless data transmission module (4) is 5G transmission.

6. The method for measuring the standard cable strand linear shape of a single-tower single-span suspension bridge of an anchored rotary cable as claimed in claim 3, characterized in that: The physical button area on the display terminal (6) is provided with an electronic knob for adjusting the rotation of the rotary motor (13).

7. The method for measuring the standard cable strand linear shape of a single-tower single-span suspension bridge of an anchored rotary cable as claimed in claim 3, characterized in that: The display area on the display terminal (6) contains three-dimensional coordinate information of the upper mirror (14) returning to the left disk and the right disk, three-dimensional coordinate information of the lower mirror (15) returning to the left disk and the right disk, three-dimensional coordinate information of known construction points, station construction information and parameter setting information, wherein the parameter setting information includes temperature, air pressure, humidity, number of measurements, tolerance, and point definition.

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