Shield tunnel contact network anchor bolt hole positioning device and its application

Abstract

The present invention belongs to the application of positioning equipment in subway tunnel construction, and particularly refers to a shield tunnel contact network anchor bolt hole positioning device and its application. The positioning device includes a tripod bracket and a laser ranging sensor; the top of the tripod bracket and the lower surface of the base plate adopt a live ball matching mechanism with a locking device, the rotating plate is arranged above the base plate and is rotatably assembled with the base plate through the shaft, the first motor on the base plate drives the shaft to rotate through the gear pair, the encoder is meshed and assembled with the gear pair, the second motor is fixed to the rotating plate and a swing arm is fixed on its output shaft, the swing arm is equipped with a laser ranging sensor and a second inclination sensor, and the rotating plate is provided with a first inclination sensor; the control device receives the signals from the first and second inclination sensors, the encoder and the laser ranging sensor, and processes and controls the start and stop and the rotation angle of the first and second motors. The present invention effectively solves the problem of the cumbersome and complicated existing positioning methods, and has the advantages of accurate positioning, simple device, and convenient measurement.

Description

Technical Field

[0001] The invention relates to the application of positioning equipment in subway tunnel construction, and in particular to a shield tunnel contact network anchor bolt hole positioning device and the application thereof. Background Art

[0002] The installation of the contact network in a subway tunnel is usually carried out after the track is laid. In order to shorten the construction period and change the traditional construction mode, a trackless construction method has emerged in the existing construction in which the contact network installation is started before the track laying is completed. One method is to simulate the laid track and then conduct measurement and positioning; the other method is to use a total station to measure, record the data, and then use other tools to calculate and finally locate. Both methods are cumbersome and complicated.

[0003] The "Urban Rail Transit Engineering Survey Specification" (GB 50308-2008) and the "High-Speed ​​Railway Engineering Survey Specification" (TB106601-2009) clearly define the requirements for the layout and measurement of the CPⅢ control network: CPⅢ control points are symmetrically arranged on both sides of the line, with a longitudinal spacing of 30m-70m between the control points; encrypted benchmarks are set every 6m on straight sections and every 5m on curved sections.

[0004] At present, the railway control network is divided into three levels: the first-level basic plane control network (CPI); the second-level line plane control network (CPII); the third-level track basic control network (CPⅢ); the third-level track basic control network (CPⅢ) is a three-dimensional control network laid along the railway line, mainly providing control benchmarks for track laying, operation and maintenance.

[0005] The "Construction Quality Acceptance Standard for Railway Electric Traction Power Supply Project" (TB10421-2018) stipulates the following for subway overhead contact network construction:

[0006] Rigid contact network positioning

[0007] The horizontal centerline of the anchor bolt is perpendicular to the centerline of the line, and the longitudinal centerline is parallel to the centerline of the line. The allowable deviation for construction along the line direction is ±500mm, and the allowable deviation for construction perpendicular to the line is ±30mm (adjustment is made when encountering joints or steel bars). Use a T-square or steel tape measure to conduct construction inspections.

[0008] The applicant has not found any patent document reporting the same or similar to the present invention. Summary of the invention

[0009] The purpose of the present invention is to provide a shield tunnel contact network anchor bolt hole positioning device and its application, which can realize the precise positioning of the shield tunnel contact network anchor bolt hole, and the device has a simple structure, low cost and easy operation.

[0010] The overall technical concept of the present invention is:

[0011] A shield tunnel contact network anchor bolt hole positioning device comprises a tripod bracket and a laser distance measuring sensor; a live ball matching mechanism with a locking device is adopted between the top of the tripod bracket and the lower surface of a base plate; a rotating plate is arranged above the base plate at intervals and is rotatably assembled with the base plate through an axis; a first motor fixed on the base plate drives the shaft to rotate through a gear pair; an encoder is meshed and assembled with the gear pair; a second motor is fixed on the rotating plate and a swing arm is fixedly assembled on its output shaft; a laser distance measuring sensor and a second inclination sensor are assembled on the swing arm; and a first inclination sensor is arranged on the rotating plate; a control device receives and processes signals from the first inclination sensor, the second inclination sensor, the laser distance measuring sensor and the encoder, and issues control instructions to the first motor and the second motor to control their start and stop and rotation angle.

[0012] Application of shield tunnel contact network anchor bolt hole positioning device.

[0013] The specific technical concept of the present invention also includes:

[0014] To facilitate the height adjustment of the tripod bracket, each leg of the tripod bracket can adopt a variety of height adjustment methods, including but not limited to a screw nut mechanism, a pull rod locking sleeve structure, a positioning pin mechanism, etc., all of which do not deviate from the technical essence of the present invention. The preferred technical solution is that each leg of the tripod bracket adopts a segmented telescopic structure with a locking component.

[0015] To facilitate the implementation of the live ball matching mechanism, the preferred technical solution is that the live ball matching mechanism uses a spherical bearing assembled at the top of the triangular bracket and the adjacent part of the lower surface of the base plate, and the locking device uses a top screw coaxially assembled by the locking knob.

[0016] In order to make the base plate have a better adjustment range and adjustment freedom, the preferred technical implementation method is that a dovetail groove is provided between the lower surface of the base plate and the live ball matching mechanism, and the action locking of the dovetail groove is controlled by a top screw coaxially assembled with the adjustment knob.

[0017] The preferred technical implementation method of the gear pair is that the gear pair includes a driving wheel fixed to the output shaft of the first motor, a driven wheel coaxially fixedly assembled with the shaft and meshing with the driving wheel, and the gear on the central axis of the encoder's code disk forms a meshing transmission pair with the driven wheel.

[0018] In order to facilitate the user's control, the preferred technical implementation means is to further include an adjustment handle, and the adjustment handle is fixed to the base plate or the dovetail groove on the base plate.

[0019] In order to facilitate more accurate detection of the angle change signal, a preferred technical implementation means is that the first inclination sensor is mounted on the outer edge of the rotating plate.

[0020] In order to improve the accuracy of the measurement data when the rotating plate rotates, the preferred technical implementation means is that when the pendulum is perpendicular to the rotating plate, its projection coincides with the center of the rotating plate.

[0021] The applicant needs to explain that the length of the rocker arm should be as short as possible while meeting the requirements for assembling the laser ranging sensor and the second inclination sensor. Its main function is to reduce the positioning error of the device.

[0022] To facilitate data reading and observation, a preferred and more common technical solution is to also include a display screen that can receive and display data output by the control device.

[0023] The application of the shield tunnel contact network anchor bolt hole positioning device includes the following steps:

[0024] A. Place the shield tunnel contact network anchor bolt hole positioning device in the tunnel, set the placement point as A, and the coordinates of point A as X, Y, and Z. Under the condition that the preset contact network anchor bolt hole coordinates and the CPⅢ pile foundation or encrypted base mark marked in the tunnel are known, select a CPⅢ pile foundation or encrypted base mark B and C before and after point A along the track laying direction in the tunnel. Points B and C are set on the tunnel wall on the same side adjacent to the laid track; install the base plate on the tripod bracket, start the device power switch, and the angle between the rotating plate and the horizontal plane is reflected as the angle between the rotating plate and the coplanar and mutually perpendicular X and Y axes respectively. The angle between the X and Y axes measured by the first inclination sensor is displayed on the display screen, adjust the tripod bracket and the base plate, and when the angles between the rotating plate and the X and Y axes respectively displayed on the display screen are 0, lock the locking device to fix the base plate;

[0025] B. Start the first motor and the second motor, the base plate is fixed, the rotating plate rotates around the axis driven by the first motor and the gear pair, the swing arm swings driven by the second motor, the laser source is turned on, the rotation of the first motor and the second motor is controlled to make the laser point coincide with the first known CPⅢ pile foundation or encrypted benchmark point C mark, and the first motor and the second motor are turned off; the laser rangefinder sensor measures the distance L1 between the laser source and the known CPⅢ pile foundation or encrypted benchmark point C, and the second inclination sensor measures the inclination of the swing arm, that is, the angle α1 between the laser beam and the horizontal plane is obtained;

[0026] C. Enter the known coordinates X1, Y1, and Z1 of the first CPⅢ pile foundation or encrypted base mark point C into the control device and confirm;

[0027] D. Control the rotation of the first motor and the second motor and turn on the laser source, so that the laser point coincides with the known second CPⅢ pile foundation or encrypted base mark point B, and turn off the first motor and the second motor; the laser distance sensor measures the distance L2 between the laser source and the known second CPⅢ pile foundation or encrypted base mark point B, and at this time, the second inclination sensor measures the inclination of the pendulum, that is, the angle α2 between the laser beam and the horizontal plane is obtained;

[0028] E. Enter the known coordinates X2, Y2, and Z2 of the second CPⅢ pile foundation or encrypted base mark point B into the control device and confirm;

[0029] F. According to the known coordinates of CPⅢ pile foundation or encrypted benchmark point B and point C and the projections of L1 and L2 on the plane composed of X and Y axes, the control device calculates the two coordinates A1 and A2 of the shield tunnel contact network anchor bolt hole positioning device on the plane composed of X and Y axes, wherein the coordinates of point A1 are X5, Y5, and the coordinates of point A2 are X6, Y6; select a CPⅢ pile foundation or encrypted benchmark point F corresponding to point B (or point C) of CPⅢ pile foundation or encrypted benchmark on the other side wall of the tunnel, the coordinates of point F are X4, Y4, Z4, enter its coordinates X4, Y4, Z4 into the control device and confirm, the control device calculates the distance from the coordinate to points A1 and A2 respectively according to the following formula, compares the values ​​of formulas ③ and ④, selects the reasonable coordinates X, Y, Z of point A of the shield tunnel contact network anchor bolt hole positioning device and displays them;

[0030] [(X4-X5) 2 +(Y4-Y5) 2 ] 1 / 2 ③

[0031] [(X4-X6) 2 +(Y4-Y6) 2 ] 1 / 2 ④

[0032] If the result of formula ③ is greater than the result of formula ④, then point A2 X6, Y6, i.e. X=X6, Y=Y6, is selected as the projection of the coordinates of point A of the shield tunnel contact network anchor bolt hole positioning device on the horizontal plane; otherwise, point A1 X5, Y5, i.e. X=X5, Y=Y5, is selected; based on the measured data α1, α2, L1, L2, the control device calculates the height difference between point A and point B (or point C) in the Z-axis direction according to the formula L11=L1×cosα1 or L21=L2×cosα2. The Z-axis coordinate of point B (or point C) is known, and the Z-axis coordinate of point A is obtained by using the formula Z=Z2-L2×sinα2 or Z=Z1-L1×sinα1;

[0033] G. The swing arm points to the second CPⅢ pile foundation or the encrypted base mark point B. According to the coordinates X, Y, Z of the shield tunnel contact network anchor bolt hole positioning device and the known coordinates X2, Y2, Z2 of the CPⅢ pile foundation or the encrypted base mark point B, the control device calculates the angles α and β between the swing arm and the positive half axis of the X axis and the negative half axis of the Z axis;

[0034] H. Based on the coordinates of points A, B, and D, the control device calculates the angles γ1 and γ2 of rotation and lifting required for the swing arm to point to the preset contact network anchor bolt hole position;

[0035] I. Control the rotation of the first motor and the second motor. Through the cooperation of the encoder, the second inclination sensor and the control device, when the rotation angle of the first motor is γ1 and the rotation angle of the second motor is γ2, control the first motor and the second motor to stop, turn on the laser ranging sensor, and mark the position of the contact network anchor bolt hole.

[0036] The measuring principle of the present invention is:

[0037] Point A is the device location, point C is the first CPⅢ pile foundation or encrypted benchmark, and its three-dimensional coordinates are X1, Y1, and Z1. Point B is the second CPⅢ pile foundation or encrypted benchmark, and its three-dimensional coordinates are X2, Y2, and Z2. The distance between A and point C of the first CPⅢ pile foundation or encrypted benchmark is L1, and the inclination angle to the horizontal plane is α1. The distance between A and point B of the second CPⅢ pile foundation or encrypted benchmark is L2, and the inclination angle to the horizontal plane is α2. When the pendulum points to point B, the angle with the positive semi-axis of the X-axis is α, and the angle with the negative semi-axis of the Z-axis is β. The coordinates of the contact network anchor bolt hole D are known to be X3, Y3, and Z3. When the pendulum points to point D, the angle between the pendulum and the horizontal plane is α3, the angle between the pendulum and the positive semi-axis of the X-axis is θ, and the angle between the pendulum and the negative semi-axis of the Z-axis is δ.

[0038] like Figure 3 As shown, from the trigonometric function relationship, we can get:

[0039] L11=L1×cosα1

[0040] L21=L2×cosα2

[0041] Z-axis coordinate of point A Z=Z2-L2×sinα2

[0042] Or Z = Z1-L1×sinα1

[0043] On the horizontal plane, the following relationship exists:

[0044] L11 and L21 form right triangles with the parallel lines of the X-axis and Y-axis respectively. Using the Pythagorean theorem, we get:

[0045] (X-X1) 2 +(Y-Y1) 2 =L11 2①

[0046] (X-X2) 2 +(Y-Y2) 2 =L21 2 ②

[0047] Select a CPⅢ pile foundation or intensified benchmark point F on the other side wall of the tunnel that corresponds to the CPⅢ pile foundation or intensified benchmark point B (or C), calculate the distance from point F to A1 (X5, Y5) and A2 (X6, Y6) according to formulas ① and ② respectively, and compare the values ​​obtained by formulas ③ and ④ to determine the X and Y axis coordinates of the device point A;

[0048] [(X4-X5) 2 +(Y4-Y5) 2 ] 1 / 2 ③

[0049] [(X4-X6) 2 +(Y4-Y6) 2 ] 1 / 2 ④

[0050] If the result of formula ③ is greater than the result of formula ④, point A2 (X6, Y6) is selected as the XY axis coordinates of point A of the shield tunnel contact network anchor bolt hole positioning device, that is, X=X6, Y=Y6; otherwise, point A1 (X5, Y5) is selected, that is, X=X5, Y=Y5; the Z axis coordinate Z of point A is combined to obtain the coordinates of point A of the device (X, Y, Z).

[0051] When the pendulum points to point B, the angle between the pendulum and the positive semi-axis of the X axis is in the right triangle formed by L21 and the parallel lines of the X and Y axes. The inverse trigonometric function relationship can be obtained:

[0052] α=arctan[(Y-Y2) / (X-X2)]

[0053] The angle between the pendulum and the negative half axis of the Z axis: β = π / 2 + α2

[0054] like Figure 4 , 5 , 6, when the pendulum points to point D:

[0055] On plane ADE, ADE is a right triangle, and the length of DE is h = Z3-Z

[0056] The length of AE is b = [(X-X3) 2 +(Y-Y3) 2 ] 1 / 2

[0057] The angle between the pendulum and the horizontal plane is α3. In the right triangle AED, the inverse trigonometric function relationship can be obtained:

[0058] α3=arctan(h / b)=arctan{(Z3-Z) / [(X-X3) 2 +(Y-Y3) 2 ] 1 / 2}

[0059] The angle between the pendulum and the positive half axis of the X axis is θ. In the right triangle formed by the parallel lines of the X and Y axes and the projection of b on the horizontal plane, the inverse trigonometric function relationship can be obtained:

[0060] θ=arctan[(Y-Y3) / (X-X3)]

[0061] The angle between the pendulum and the negative half axis of the Z axis is δ: δ = π / 2 + α3

[0062] The required rotation angle of the first motor γ1 = θ-α;

[0063] The required rotation angle of the second motor γ2 = δ - β.

[0064] The applicant needs to state:

[0065] In the description of the present invention, the terms "top", "lower surface", "above", "lower surface", "outer edge" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the purpose of simplifying the description of the present invention, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention. The terms "first" and "second" are only used to distinguish between components and cannot be understood as implying importance.

[0066] The substantial features and significant technical advances of the present invention are:

[0067] 1. During the test, the present invention can quickly and accurately measure the distance from the device to the CPⅢ pile foundation or the encrypted foundation mark through the internal processing of the controller and the operation of the control device, and use the inclination sensor to measure the inclination of the swing arm. Finally, the coordinates of the device are calculated and located by the control device, avoiding the cumbersome process of first using a simulated track (or measuring with a total station) and recording data and then calculating in the existing construction. This method can automatically achieve accurate positioning of the anchor bolt holes of the shield tunnel contact network. There are no special requirements for the placement of the device, the equipment is simple, and after the data measurement is completed, the control device can intuitively and quickly display the calculation results, ensuring that the work process from the beginning of adjusting the device to the end of positioning is completed in a short time.

[0068] 2. The design of the adjustment mechanism and sensor on the tripod bracket, base plate and rotating plate enables the first motor and the second motor to effectively adjust the angle of the pendulum arm and achieve precise positioning under the action of the control system.

[0069] 3. The structural design of the adjustment handle, locking device and adjustment knob makes the control and positioning of the equipment more convenient and flexible, while saving effort.

[0070] 4. The first motor and the second motor adopt stepping rotary motors, which can accurately control the rotation angle of the parts to achieve precise adjustment of the mechanism.

[0071] 5. The encoder and the second inclination sensor can accurately measure and transmit angle change signals, and transmit the above signals to the control device to control the start and stop and rotation angle of the motor, so as to achieve precise control of the angle change of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0073] Figure 2 It is the control principle diagram of the present invention.

[0074] Figure 3 It is a schematic diagram of tunnel coordinate geometry of the present invention.

[0075] Figure 4 It is a schematic diagram of the coordinate geometry of the anchor bolt holes of the contact network of the shield tunnel of the present invention.

[0076] Figure 5 It is a schematic diagram of the horizontal rotation angle of the rotating plate in the present invention.

[0077] Figure 6 It is a schematic diagram of the swing angle of the swing rod in the present invention.

[0078] The reference numerals in the accompanying drawings are as follows:

[0079] 1. Triangle bracket; 2. Base plate; 3. Shaft; 4. Control device; 5. First motor; 6. Gear pair; 7. Rotating plate; 8. First inclination sensor; 9. Second motor; 10. Rocker; 11. Laser ranging sensor; 12. Second inclination sensor; 13. Adjustment knob; 14. Locking knob; 15. Live ball; 16. Adjustment handle; 17. Fixing belt; 18. Encoder. DETAILED DESCRIPTION

[0080] The present invention is further described below in conjunction with embodiments, but it should not be construed as limiting the present invention. The protection scope of the present invention shall be based on the contents recorded in the claims, and any replacement of equivalent technical means made according to the description shall not depart from the protection scope of the present invention.

[0081] The overall structure and control principle of this embodiment are shown in the figure. The shield tunnel contact network anchor bolt hole positioning device includes a triangular bracket 1 and a laser ranging sensor 11; the top of the triangular bracket 1 and the lower surface of the base plate 2 adopt a live ball matching mechanism with a locking device, the rotating plate 7 is arranged above the base plate 2 and is rotatably assembled with it through the shaft 3, the first motor 5 fixed on the base plate 2 drives the shaft 3 to rotate through the gear pair 6, the encoder 18 is meshed and assembled with the gear pair 6, the second motor 9 is fixed on the rotating plate 7 and a swing arm 10 is fixedly assembled on its output shaft, the swing arm 10 is equipped with a laser ranging sensor 11 and a second inclination sensor 12, and the rotating plate 7 is provided with a first inclination sensor 8; the control device 4 receives and processes the signals sent by the first inclination sensor 8, the second inclination sensor 12, the laser ranging sensor 11 and the encoder 18, and sends control instructions to the first motor 5 and the second motor 9 to control their start and stop and rotation angle.

[0082] Application of shield tunnel contact network anchor bolt hole positioning device.

[0083] Each leg of the tripod bracket 1 adopts a segmented pull-rod telescopic structure with a locking sleeve.

[0084] The live ball matching mechanism uses a spherical bearing mounted on the top of the tripod bracket 1 and the adjacent portion of the lower surface of the base plate 2, and the locking device uses a top screw coaxially assembled by the locking knob 14.

[0085] A dovetail slot is provided between the lower surface of the base plate 2 and the live ball matching mechanism, and the action locking of the dovetail slot is controlled by a top screw coaxially assembled with the adjusting knob 13.

[0086] The gear pair 6 includes a driving wheel fixed to the output shaft of the first motor 5, a driven wheel coaxially fixedly assembled with the shaft 3 and meshing with the driving wheel, and the gear on the central axis of the code disk of the encoder 18 forms a meshing transmission pair with the driven wheel.

[0087] The device further comprises an adjustment handle 16 , which is fixed to the base plate 2 or a dovetail groove on the base plate 2 .

[0088] The first inclination sensor 8 is mounted on the outer edge of the rotating plate 7 .

[0089] When the swing rod 10 is perpendicular to the rotating plate 7 , its projection coincides with the center of the rotating plate 7 .

[0090] It also includes a display screen that can receive and display data output by the control device 4.

[0091] The application of the adjustment and positioning mechanism of the shield tunnel contact network anchor bolt hole positioning device includes the following steps:

[0092] A. Place the shield tunnel contact network anchor bolt hole positioning device in the tunnel, set the placement point to A, and the coordinates of point A are X, Y, and Z. Under the condition that the preset contact network anchor bolt hole coordinates and the CPⅢ pile foundation or encrypted base mark marked in the tunnel are known, select a CPⅢ pile foundation or encrypted base mark B and C before and after point A along the track laying direction in the tunnel, and points B and C are set on the tunnel wall on the same side adjacent to the laid track; install the base plate 2 on the tripod bracket 1, start the device power switch, the angle between the rotating plate 7 and the horizontal plane is reflected as the angle between the rotating plate 7 and the coplanar and mutually perpendicular X and Y axes, respectively, the angle between the X and Y axes measured by the first inclination sensor 8 is displayed on the display screen, adjust the tripod bracket 1 and the base plate 2, and when the angles between the rotating plate 7 and the X and Y axes shown on the display screen are both 0, lock the locking device to fix the base plate 2;

[0093] B. Start the first motor 5 and the second motor 9, the base plate 2 is fixed, the rotating plate 7 rotates around the axis 3 driven by the first motor 5 and the gear pair 6, the swing rod 10 swings driven by the second motor 9, the laser source is turned on, the rotation of the first motor 5 and the second motor 9 is controlled to make the laser point coincide with the first known CPⅢ pile foundation or encrypted benchmark point C mark, and the first motor 5 and the second motor 9 are turned off; the laser range sensor 11 measures the distance L1 between the laser source and the known CPⅢ pile foundation or encrypted benchmark point C, and the second inclination sensor 12 measures the inclination of the swing rod 10, that is, the angle α1 between the laser beam and the horizontal plane is obtained;

[0094] C. Enter the known coordinates X1, Y1, and Z1 of the first CPⅢ pile foundation or encrypted base mark point C into the control device 4 and confirm;

[0095] D. Control the rotation of the first motor 5 and the second motor 9 and turn on the laser source, so that the laser point coincides with the known second CPⅢ pile foundation or encrypted base mark point B, and turn off the first motor 5 and the second motor 9; the laser distance sensor 11 measures the distance L2 between the laser source and the known second CPⅢ pile foundation or encrypted base mark point B, and at this time, the second inclination sensor 12 measures the inclination of the pendulum 10, that is, the angle α2 between the laser beam and the horizontal plane is obtained;

[0096] E. Enter the known coordinates X2, Y2, and Z2 of the second CPⅢ pile foundation or encrypted base mark point B into the control device 4 and confirm;

[0097] F. According to the known CPⅢ pile foundation or encrypted benchmark point B, point C coordinates and projections of L1 and L2 on the plane composed of X and Y axes, the control device 4 calculates two coordinates A1 and A2 of the shield tunnel contact network anchor bolt hole positioning device on the plane composed of X and Y axes, wherein the coordinates of point A1 are X5, Y5, and the coordinates of point A2 are X6, Y6; select a CPⅢ pile foundation or encrypted benchmark point F corresponding to point B (or point C) of the CPⅢ pile foundation or encrypted benchmark on the other side wall of the tunnel, the coordinates of point F are X4, Y4, Z4, and its coordinates X4, Y4, Z4 are entered into the control device 4 and confirmed, and the control device 4 calculates the distance from the coordinate to points A1 and A2 respectively according to the following formulas, compares the sizes of the results of formulas ③ and ④, selects reasonable coordinates X, Y, Z of point A of the shield tunnel contact network anchor bolt hole positioning device and displays them;

[0098] [(X4-X5) 2 +(Y4-Y5) 2 ] 1 / 2 ③

[0099] [(X4-X6) 2 +(Y4-Y6) 2 ] 1 / 2 ④

[0100] If the result of formula ③ is greater than the result of formula ④, then select point A2 X6, Y6, that is, X=X6, Y=Y6 as the projection of the coordinates of point A of the shield tunnel contact network anchor bolt hole positioning device on the horizontal plane, otherwise select point A1 X5, Y5, that is, X=X5, Y=Y5; according to the measured data α1, α2, L1, L2, the control device 4 calculates the height difference between point A and point B (or point C) in the Z-axis direction according to the formula L11=L1×cosα1 or L21=L2×cosα2, the Z-axis coordinate of point B (or point C) is known, and the Z-axis coordinate of point A is obtained by using the formula Z=Z2-L2×sinα2 or Z=Z1-L1×sinα1;

[0101] G. The swing rod 10 points to the second CPⅢ pile foundation or the encrypted base mark point B. According to the coordinates X, Y, Z of the shield tunnel contact network anchor bolt hole positioning device and the known coordinates X2, Y2, Z2 of the CPⅢ pile foundation or the encrypted base mark point B, the control device calculates the angles α and β between the swing rod 10 and the positive half axis of the X axis and the negative half axis of the Z axis;

[0102] H. Based on the coordinates of points A, B, and D, the control device 4 calculates the angles γ1 and γ2 of rotation and lifting required for the swing arm 10 to point to the preset contact network anchor bolt hole position;

[0103] I. Control the rotation of the first motor 5 and the second motor 9. Through the cooperation of the encoder 18, the second inclination sensor 12 and the control device 4, when the rotation angle of the first motor 5 is γ1 and the rotation angle of the second motor 9 is γ2, control the first motor 5 and the second motor 9 to stop, turn on the laser ranging sensor 11, and mark the position of the contact network anchor bolt hole.

Claims

1. Application of a shield tunnel contact network anchor bolt hole positioning device, the shield tunnel contact network anchor bolt hole positioning device comprising a triangular bracket (1) and a laser ranging sensor (11); the top of the triangular bracket (1) and the lower surface of a base plate (2) adopt a live ball matching mechanism with a locking device, a rotating plate (7) is arranged above the base plate (2) and is rotatably assembled with the base plate (2) through a shaft (3), a first motor (5) fixed on the base plate (2) drives the shaft (3) to rotate through a gear pair (6), an encoder (18) is meshed with the gear pair (6), and a second motor (9) is provided. ) is fixed on a rotating plate (7) and a swing rod (10) is fixedly mounted on its output shaft, a laser distance sensor (11) and a second inclination sensor (12) are mounted on the swing rod (10), and a first inclination sensor (8) is arranged on the rotating plate (7); a control device (4) receives and processes signals from the first inclination sensor (8), the second inclination sensor (12), the laser distance sensor (11) and the encoder (18), and issues control instructions to the first motor (5) and the second motor (9) to control their start and stop and rotation angle; it is characterized in that The steps include: A. Place the shield tunnel contact network anchor bolt hole positioning device in the tunnel, set the placement point as A, and the coordinates of point A are (X, Y, Z). Under the condition that the preset contact network anchor bolt hole coordinates and the CPⅢ pile foundation or dense base mark marked in the tunnel are known, select a CPⅢ pile foundation or dense base mark B and C before and after point A along the track laying direction in the tunnel. Points B and C are set on the tunnel wall on the same side adjacent to the track laying; The base plate (2) is mounted on the tripod bracket (1), and the device power switch is turned on. The angle between the rotating plate (7) and the horizontal plane is reflected as the angle between the rotating plate (7) and the coplanar and mutually perpendicular X and Y axes. The angle between the X and Y axes measured by the first inclination sensor (8) is displayed on the display screen. The tripod bracket (1) and the base plate (2) are adjusted. When the angles between the rotating plate (7) and the X and Y axes shown on the display screen are both 0, the locking device is locked to fix the base plate (2); B. Start the first motor (5) and the second motor (9), the base plate (2) is fixed, the rotating plate (7) rotates around the axis (3) driven by the first motor (5) and the gear pair (6), the swing rod (10) swings under the drive of the second motor (9), the laser source is turned on, the rotation of the first motor (5) and the second motor (9) is controlled so that the laser point coincides with the first known CPⅢ pile foundation or encrypted benchmark point C mark, and the first motor (5) and the second motor (9) are turned off; the laser distance sensor (11) measures the distance L1 between the laser source and the known CPⅢ pile foundation or encrypted benchmark point C, and at this time the second inclination sensor (12) measures the inclination of the swing rod (10), that is, the angle α1 between the laser beam and the horizontal plane is obtained; C. Enter the known coordinates (X1, Y1, Z1) of the first CPⅢ pile foundation or encrypted base mark point C into the control device (4) and confirm; D. Control the rotation of the first motor (5) and the second motor (9) and turn on the laser source so that the laser point coincides with the known second CPⅢ pile foundation or encrypted base mark point B, and turn off the first motor (5) and the second motor (9); the laser distance sensor (11) measures the distance L2 between the laser source and the known second CPⅢ pile foundation or encrypted base mark point B, and at this time, the second inclination sensor (12) measures the inclination of the pendulum (10), that is, the angle α2 between the laser beam and the horizontal plane is obtained; E. Enter the known coordinates (X2, Y2, Z2) of the second CPⅢ pile foundation or encrypted base mark point B into the control device (4) and confirm; F. Based on the known coordinates of the CPⅢ pile foundation or encrypted benchmark point B and point C and the projections of L1 and L2 on the plane composed of the X and Y axes, the control device (4) calculates two coordinates of the shield tunnel contact network anchor bolt hole positioning device, point A1 and point A2, on the plane composed of the X and Y axes, wherein the coordinates of point A1 are (X5, Y5) and the coordinates of point A2 are (X6, Y6); select a CPⅢ pile foundation or encrypted benchmark point F corresponding to the CPⅢ pile foundation or encrypted benchmark point B (or point C) on the other side wall of the tunnel, the coordinates of point F are (X4, Y4, Z4), enter its coordinates (X4, Y4, Z4) into the control device (4) and confirm, the control device (4) calculates the distance from the coordinates to points A1 and A2 respectively according to the following formulas, compares the values ​​of formulas ③ and ④, selects a reasonable coordinate (X, Y, Z) of point A of the shield tunnel contact network anchor bolt hole positioning device and displays it; <h2 style=";text-align:left;direction:ltr">[(X4-X5)<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> +(Y4-Y5)<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> ]<h2 style=";text-align:left;direction:ltr"> 1 / 2 <h2 style=";text-align:left;direction:ltr"> 3 [(X4-X6) 2 +(Y4-Y6) 2 ] 1 / 2 ④ If the result of formula ③ is greater than the result of formula ④, then point A2 (X6, Y6), i.e., X=X6, Y=Y6, is selected as the projection of the coordinates of point A of the shield tunnel contact network anchor bolt hole positioning device on the horizontal plane; otherwise, point A1 (X5, Y5), i.e., X=X5, Y=Y5, is selected; based on the measured data α1, α2, L1, and L2, the control device (4) calculates the height difference between point A and point B (or point C) in the Z-axis direction according to the formula L11=L1×cosα1 or L21=L2×cosα2; the Z-axis coordinate of point B (or point C) is known, and the Z-axis coordinate of point A is obtained by using the formula Z=Z2-L2×sinα2 or Z=Z1-L1×sinα1; G. The swing rod (10) points to the second CPⅢ pile foundation or the encrypted base mark point B. According to the coordinates (X, Y, Z) of the shield tunnel contact network anchor bolt hole positioning device and the known coordinates (X2, Y2, Z2) of the CPⅢ pile foundation or the encrypted base mark point B, the control device calculates the angles α and β between the swing rod (10) and the positive half axis of the X axis and the negative half axis of the Z axis; H. Based on the coordinates of points A, B and D, the control device (4) calculates the angles γ1 and γ2 of rotation and lifting required for the swing arm (10) to point to the preset contact network anchor bolt hole position; I. Controlling the rotation of the first motor (5) and the second motor (9), through the cooperation of the encoder (18), the second inclination sensor (12) and the control device (4), when the rotation angle of the first motor (5) is γ1 and the rotation angle of the second motor (9) is γ2, controlling the first motor (5) and the second motor (9) to stop, turning on the laser distance measuring sensor (11), and marking the position of the contact network anchor bolt hole.

2. Application of the shield tunnel contact network anchor bolt hole positioning device according to claim 1, characterized in that Each leg of the triangular bracket (1) adopts a segmented telescopic structure with a locking component.

3. Application of the shield tunnel contact network anchor bolt hole positioning device according to claim 1, characterized in that The live ball matching mechanism uses a spherical bearing mounted on the top of the triangular bracket (1) and the adjacent portion of the lower surface of the base plate (2), and the locking device uses a top screw coaxially assembled with a locking knob (14).

4. Application of the shield tunnel contact network anchor bolt hole positioning device according to claim 1, characterized in that A dovetail slot is provided between the lower surface of the base plate (2) and the live ball matching mechanism, and the action locking of the dovetail slot is controlled by a top screw coaxially assembled with the adjusting knob (13).

5. Application of the shield tunnel contact network anchor bolt hole positioning device according to claim 1, characterized in that The gear pair (6) comprises a driving wheel fixed to the output shaft of the first motor (5), a driven wheel fixedly assembled coaxially with the shaft (3) and meshing with the driving wheel, and a gear on the central axis of the code disk of the encoder (18) and the driven wheel form a meshing transmission pair.

6. Application of the shield tunnel contact network anchor bolt hole positioning device according to any one of claims 1, 3 or 4, characterized in that It also includes an adjustment handle (16), which is fixed to the base plate (2) or a dovetail groove on the base plate (2).

7. Application of the shield tunnel contact network anchor bolt hole positioning device according to claim 1, characterized in that The first inclination sensor (8) is mounted on the outer edge of the rotating plate (7).

8. According to the application of the shield tunnel contact network anchor bolt hole positioning device as described in claim 1, when the swing rod (10) is perpendicular to the rotating plate (7), its projection coincides with the center of the rotating plate (7).

9. Application of the shield tunnel contact network anchor bolt hole positioning device according to claim 1, characterized in that It also includes a display screen which can receive and display data output by the control device (4).

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