Three-dimensional acquisition device and acquisition method for advanced prediction data of tunnel geological radar

Abstract

The present invention provides a three-dimensional acquisition device and acquisition method for tunnel geological radar advance prediction data, the device includes: geological radar antenna box, antenna box mounting plate, telescopic cantilever, connecting seat, bearing seat, driving mechanism, counterweight rod, counterweight block, telescopic column, support foot connecting seat, support foot and roller; the telescopic cantilever and the counterweight rod are coaxially fixed to the connecting seat; the outer end of the telescopic cantilever is fixedly installed with the antenna box mounting plate; the geological radar antenna box is assembled on the antenna box mounting plate; the outer end of the counterweight rod is fixedly installed with the counterweight block; the connecting seat is connected to the driving mechanism through the bearing seat. The present invention greatly reduces the difficulty of manual operation, reduces the workload of operators, and ensures the safety of operators and equipment; data acquisition points can cover the entire face and improve the accuracy of collected data; more accurate advance prediction data can be obtained through three-dimensional modeling and subsequent data analysis and processing technology; it saves space and is convenient to carry.

Description

Technical Field

[0001] The invention belongs to the technical field of geological radar advance prediction detection, and in particular relates to a three-dimensional acquisition device and an acquisition method for tunnel geological radar advance prediction data. Background Art

[0002] Tunnel construction often faces complex geological conditions, such as tunnel collapse caused by faults, karst caves, broken rock mass and other unfavorable geological bodies, soft surrounding rocks formed by strong weathering, and landslides caused by unstable rock formations in a water-rich environment. In order to ensure the safety of construction personnel and property, advanced geological prediction has become an indispensable part of the tunnel construction process. Geological radar detection, as a convenient and fast non-destructive short-range geophysical exploration method, has been widely used in advanced geological prediction.

[0003] At present, during tunnel construction, the main method of geological radar detection is to manually hold the geological radar antenna in contact with the rock mass for detection. This detection method has the following disadvantages: (1) The operator must be in close contact with the tunnel face. However, the tunnel near the tunnel face is not supported, and there is a possibility of block falling and collapse, which makes the safety of the operator and equipment not guaranteed; (2) When manually holding the radar antenna for detection, the speed of the radar antenna movement depends entirely on the operator's athletic ability. The movement speed is uneven, and the final correspondence between the data used for 3D modeling and the coordinate points is inaccurate, resulting in the analysis results not being consistent with the actual situation and poor detection effect; (3) Since the geological radar antenna has a relatively large deadweight and the ground conditions near the tunnel face are relatively complex, the method of manually lifting the geological radar antenna greatly increases the difficulty of the operator's work and the work intensity is high; (4) When the geological radar antenna is moved manually, the movement trajectory accounts for a relatively small proportion of the entire tunnel face, and the collected data is relatively small. Summary of the invention

[0004] In view of the defects of the prior art, the present invention provides a three-dimensional acquisition device and acquisition method for tunnel geological radar advance prediction data, which can effectively solve the above problems.

[0005] The technical solution adopted by the present invention is as follows:

[0006] The present invention provides a three-dimensional acquisition device for advanced prediction data of a tunnel geological radar, comprising: a geological radar antenna box (1), an antenna box mounting plate (2), a telescopic cantilever (3), a connecting seat (4), a bearing seat (5), a driving mechanism, a counterweight rod (8), a counterweight block (9), a telescopic column (10), a supporting foot connecting seat (11), a supporting foot (12) and a roller (14);

[0007] The telescopic cantilever (3) and the counterweight rod (8) are coaxially fixedly mounted on the connecting seat (4); the antenna box mounting plate (2) is fixedly mounted on the outer end of the telescopic cantilever (3); the geological radar antenna box (1) is mounted on the antenna box mounting plate (2); the counterweight block (9) is fixedly mounted on the outer end of the counterweight rod (8); the connecting seat (4) is connected to the driving mechanism via the bearing seat (5);

[0008] The roller (14) is fixedly mounted on the bottom end of the telescopic column (10); the top end of the telescopic column (10) is fixed to the connecting seat (4); the supporting leg connecting seat (11) is sleeved on the outside of the telescopic column (10) and can slide up and down along the telescopic column (10); and a plurality of supporting legs (12) are evenly hingedly mounted on the outer periphery of the supporting leg connecting seat (11).

[0009] Preferably, the driving mechanism comprises a reducer (6) and a servo motor (7);

[0010] The servo motor (7) is connected to the bearing seat (5) via the reducer (6).

[0011] Preferably, the telescopic cantilever (3) is a three-section telescopic cantilever, namely a first telescopic cantilever, a second telescopic cantilever and a third telescopic cantilever; the first telescopic cantilever and the second telescopic cantilever are both screw-line rail structures driven by a cantilever servo motor; the third telescopic cantilever is an electric telescopic cylinder structure driven by a cantilever servo motor.

[0012] Preferably, the supporting foot (12) is a telescopic supporting foot.

[0013] Preferably, the roller (14) is a rubber roller.

[0014] Preferably, it further comprises a control box (13); the control box (13) is electrically connected to the driving mechanism.

[0015] The present invention also provides a method for collecting three-dimensional data of tunnel geological radar advance prediction, comprising the following steps:

[0016] Step 1: Tow and move the three-dimensional acquisition device of the tunnel geological radar advance prediction data to a designated position in front of the tunnel face;

[0017] Step 2, adjusting the telescopic height of the telescopic column (10) according to the actual height of the tunnel face, thereby adjusting the overall height of the three-dimensional acquisition device for advanced prediction data of the tunnel geological radar, so that the geological radar antenna box (1) passes through the data acquisition position required for this test when rotating;

[0018] Step 3, after the height of the telescopic column (10) is adjusted to the desired position, the supporting foot connecting seat (11) is slid along the telescopic column (10), and the supporting foot connecting seat (11) is rotated around the telescopic column (10) to adjust the height and direction of the supporting foot connecting seat (11), and then the opening angle of the supporting foot (12) is adjusted to make the supporting foot (12) support the entire device in a balanced manner; then, the screw is tightened to lock the height and direction of the supporting foot connecting seat (11);

[0019] Step 4, adjusting the length of the telescopic cantilever (3) by the action of the cantilever servo motor, so that the telescopic cantilever (3) is extended to a first specified length R1;

[0020] Then, the driving mechanism drives the telescopic cantilever (3), the counterweight rod (8), the counterweight block (9), the geological radar antenna box (1) and the antenna box mounting plate (2) to form an integral rotating part through the bearing seat (5) to rotate at a controllable and uniform speed; during the rotation of the integral rotating part, the geological radar antenna box (1) synchronously performs data collection, thereby completing data collection in the circumferential direction with R1 as the radius;

[0021] When the geological radar antenna box (1) rotates one circle, the telescopic cantilever (3) is extended to a second specified length R2, and the telescopic cantilever (3) is rotated one circle again, so that the geological radar antenna box (1) completes data collection in a circumferential direction with R2 as a radius;

[0022] Similarly, by changing the length of the telescopic cantilever (3) multiple times, the rotation diameter is changed, so that the geological radar antenna box (1) completes data collection in different radii and circumferential directions until the data collection points cover the entire tunnel face, thereby obtaining advanced prediction detection data simulating the entire tunnel face.

[0023] The three-dimensional acquisition device and acquisition method of tunnel geological radar advance prediction data provided by the present invention have the following advantages:

[0024] The present invention greatly reduces the difficulty of manual operation, reduces the workload of operators, and ensures the safety of operators and equipment; data collection points can be distributed over the entire tunnel face and the accuracy of collected data can be improved; more accurate advance forecast data can be obtained through three-dimensional modeling and subsequent data analysis and processing technology; space is saved and it is convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a three-dimensional acquisition device for advanced prediction data of a tunnel geological radar provided by the present invention;

[0026] Figure 2 A diagram showing a usage scenario of the three-dimensional acquisition device for tunnel geological radar advance prediction data provided by the present invention. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The present invention provides a three-dimensional acquisition device for tunnel geological radar advance prediction data, which is used for assisting geological radar advance prediction detection during tunnel construction. The present invention can completely solve various defects existing in existing manual detection. The device is easy to install, and the movement of the geological radar antenna box can be controlled by remote control, so as to synchronously realize the data acquisition of the tunnel face, which greatly reduces the work intensity of the operator; the rotation of the geological radar antenna box is servo-controlled, and the movement speed is uniform, so that the precise coordinates of each data collection can be obtained, and the three-dimensional model can be accurately built; through the rotation method, the geological radar antenna moves along the circular arc trajectory, and the rotation radius is changed multiple times, so that the advanced detection data of the entire section can be obtained, which provides more favorable support for modeling and analysis.

[0029] The present invention provides accurate advance forecast data, so that the geological radar detection data collection points cover the entire tunnel face. Compared with the existing operation mode, the detection is more objective and closer to reality, providing accurate data support for design and construction. It ensures the safety of detection personnel and equipment and reduces unnecessary losses during construction. It improves the automation of detection work, reduces the workload of operators, and reduces the dependence of advance forecast detection work on the personal ability and proficiency of personnel.

[0030] refer to Figure 1 The three-dimensional acquisition device for the advanced prediction data of the tunnel geological radar includes: a geological radar antenna box 1, an antenna box mounting plate 2, a telescopic cantilever 3, a connecting seat 4, a bearing seat 5, a driving mechanism, a counterweight rod 8, a counterweight block 9, a telescopic column 10, a supporting foot connecting seat 11, a supporting foot 12 and a roller 14;

[0031] The telescopic cantilever 3 is a three-section telescopic cantilever, which are the first telescopic cantilever, the second telescopic cantilever and the third telescopic cantilever; the first telescopic cantilever and the second telescopic cantilever are both screw-line rail structures driven by the cantilever servo motor; the third telescopic cantilever is an electric telescopic cylinder structure driven by the cantilever servo motor. Therefore, the three-section telescopic cantilever is driven by the servo motor, and the telescopic length of the telescopic cantilever can be accurately controlled.

[0032] The telescopic cantilever 3 and the counterweight rod 8 are coaxially fixed to the connecting seat 4; the antenna box mounting plate 2 is fixedly installed on the outer end of the telescopic cantilever 3; the geological radar antenna box 1 is assembled on the antenna box mounting plate 2, for example, the geological radar antenna box 1 is installed by quick-release screws; the counterweight rod is assembled by a special quick-release clamp and is in a straight line with the telescopic cantilever 3.

[0033] The outer end of the counterweight rod 8 is fixedly mounted with a counterweight block 9; the counterweight block 9 is mounted by means of quick-release screws;

[0034] The connecting seat 4 is connected to the driving mechanism through the bearing seat 5; specifically, the driving mechanism includes a reducer 6 and a servo motor 7; the servo motor 7 is connected to the bearing seat 5 through the reducer 6.

[0035] Therefore, the servo motor 7 cooperates with the large speed ratio reducer to output sufficient torque, and drives the telescopic boom 3 and the counterweight rod 8 to rotate simultaneously through the bearing seat. When the telescopic boom 3 rotates, it drives the geological radar antenna box 1 to rotate, so that the geological radar antenna box 1 can collect data at different positions.

[0036] The telescopic column 10 is a multi-section telescopic device, which can be driven to automatically extend and retract by hydraulic, electric or pneumatic means, and the height of the bracket can be adjusted to 3-5 meters according to the actual height of the tunnel.

[0037] A roller 14 is fixedly mounted on the bottom end of the telescopic column 10; the roller 14 is a rubber roller.

[0038] The top of the telescopic column 10 is fixed to the connecting seat 4; the supporting foot connecting seat 11 is sleeved on the outside of the telescopic column 10 and can slide up and down along the telescopic column 10; a plurality of supporting feet 12 are evenly hingedly installed on the outer periphery of the supporting foot connecting seat 11. Among them, the supporting feet 12 can rotate or slide on the telescopic column 10 by using the supporting foot connecting seat 11 to adjust the angle and height of the supporting point. The supporting feet 12 are telescopic supporting feet, which are manually adjusted to a suitable length to support the entire device and achieve a balanced state.

[0039] It also includes a control box 13; the control box 13 is electrically connected to the driving mechanism.

[0040] The present invention also provides a method for collecting three-dimensional data of a tunnel geological radar advance prediction device, referring to Figure 2 , including the following steps:

[0041] Step 1: Tow and move the three-dimensional acquisition device of the tunnel geological radar advance prediction data to a designated position in front of the tunnel face;

[0042] Specifically, a rubber roller is installed at the bottom of the device of the present invention, so it can be easily pulled and moved to a designated position near the tunnel face. After reaching the designated position, the geological radar antenna box 1 and the counterweight block 9 are installed by quick-release screws, and the counterweight rod 8 is assembled by a special quick-release fixture and is in a straight line with the telescopic cantilever 3.

[0043] Step 2, the telescopic column 10 can automatically telescope up and down. Therefore, the telescopic height of the telescopic column 10 is adjusted to 3-5 meters according to the actual height of the tunnel face, thereby adjusting the overall height of the tunnel geological radar advance prediction data three-dimensional acquisition device, so that the geological radar antenna box 1 rotates through the data acquisition position required for this test;

[0044] Step 3, the support leg connecting seat 11 can rotate around the axis of the telescopic column 10 and can slide along the telescopic column 10 to adjust its height and direction on the telescopic column 10; the support leg 12 is 3 pieces / set, which can be rotated and opened on the support leg connecting seat 11 to a suitable tilting state. The support leg 12 itself can be extended and retracted. After being extended to a suitable length, tighten the screws to fix it. The three support legs 12 play a role of balancing and supporting the entire device without affecting the movement of the geological radar antenna box 1.

[0045] Therefore, after the height of the telescopic column 10 is adjusted to the right position, the support foot connection seat 11 is slid along the telescopic column 10, and the support foot connection seat 11 is rotated around the telescopic column 10, so as to adjust the height and direction of the support foot connection seat 11, and then adjust the opening angle of the support foot 12, so that the support foot 12 can balance and support the entire device; then, tighten the screw to lock the height and direction of the support foot connection seat 11;

[0046] Step 4, adjusting the length of the telescopic cantilever 3 by the action of the cantilever servo motor, so that the telescopic cantilever 3 is extended to a first specified length R1;

[0047] Then, the driving mechanism drives the telescopic cantilever 3, the counterweight rod 8, the counterweight block 9, the geological radar antenna box 1 and the antenna box mounting plate 2 to form an integral rotating part to rotate at a controllable and uniform speed through the bearing seat 5; data collection on a circle of a radius can be completed every half turn;

[0048] During the rotation of the integral rotating part, the geological radar antenna box 1 synchronously collects data, thereby completing the data collection in the circumferential direction with R1 as the radius;

[0049] When the geological radar antenna box 1 rotates one circle, the telescopic cantilever 3 is extended to the second specified length R2, and the telescopic cantilever 3 is rotated one circle again, so that the geological radar antenna box 1 completes the data collection in the circumferential direction with R2 as the radius;

[0050] Similarly, by changing the length of the telescopic cantilever 3 multiple times, thereby changing the rotation diameter, the geological radar antenna box 1 completes data collection in circular directions of different radii until the data collection points cover the entire tunnel face, thereby obtaining advanced prediction detection data simulating the entire tunnel face.

[0051] In the present invention, the three parameters of cantilever length, column height and rotation angle can be used to calculate the precise coordinates of each data collection point, providing accurate data guarantee for three-dimensional modeling. When the device is not in operation, the geological radar antenna box and the counterweight block can be removed, the cantilever and the counterweight rod can be retracted, and the telescopic column can be lowered to the lowest state, saving transportation space and eliminating the need for a large handling device.

[0052] The three-dimensional acquisition device and acquisition method of tunnel geological radar advance prediction data provided by the present invention have the following advantages:

[0053] (1) After the three-dimensional acquisition device of the tunnel geological radar advance prediction data is arranged in front of the tunnel face and adjusted to the right state, the geological radar antenna box automatically rotates one circle driven by the motor and completes one circle of data acquisition at the same time. Therefore, during the data acquisition process, the operator does not need to get close to the tunnel face, ensuring the safety of the operator;

[0054] (2) The geological radar antenna box rotates at a controllable and uniform speed driven by the motor, ensuring the accuracy of the correspondence between the 3D modeling data and the coordinate points, thereby ensuring the detection effect;

[0055] (3) With the support of telescopic columns and other components, the geological radar antenna box is brought into contact with the sampling position without the need for manual lifting, thus reducing the difficulty and intensity of the operator's work;

[0056] Therefore, the present invention can completely solve the defects existing in the prior art, greatly reduce the difficulty of manual operation, reduce the workload of operators, and ensure the safety of operators and equipment; data collection points can be distributed over the entire tunnel face and the accuracy of collected data can be improved; more accurate advance forecast data can be obtained through three-dimensional modeling and subsequent data analysis and processing technology; space is saved and it is convenient to carry.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A three-dimensional acquisition device for advanced prediction data of tunnel geological radar, characterized in that: include: Geological radar antenna box (1), antenna box mounting plate (2), telescopic cantilever (3), connecting seat (4), bearing seat (5), driving mechanism, counterweight rod (8), counterweight block (9), telescopic column (10), supporting foot connecting seat (11), supporting foot (12) and roller (14); The telescopic cantilever (3) and the counterweight rod (8) are coaxially fixedly mounted on the connecting seat (4); the antenna box mounting plate (2) is fixedly mounted on the outer end of the telescopic cantilever (3); the geological radar antenna box (1) is mounted on the antenna box mounting plate (2); the counterweight block (9) is fixedly mounted on the outer end of the counterweight rod (8); the connecting seat (4) is connected to the driving mechanism via the bearing seat (5); The roller (14) is fixedly mounted on the bottom end of the telescopic column (10); the top end of the telescopic column (10) is fixed to the connecting seat (4); the supporting foot connecting seat (11) is sleeved on the outside of the telescopic column (10) and can slide up and down along the telescopic column (10); a plurality of supporting feet (12) are evenly hingedly mounted on the outer periphery of the supporting foot connecting seat (11); the telescopic cantilever (3) is a three-section telescopic cantilever, namely a first telescopic cantilever, a second telescopic cantilever and a third telescopic cantilever; the first telescopic cantilever and the second telescopic cantilever are both screw linear rail structures driven by a cantilever servo motor; the third telescopic cantilever is an electric telescopic cylinder structure driven by a cantilever servo motor; The support foot (12) is rotated or slid on the telescopic column (10) by using the support foot connecting seat (11) to adjust the angle and height of the support point. The support foot (12) is a telescopic support foot, which is manually adjusted to a suitable length to support the entire device and achieve a balanced state. The driving mechanism comprises a reducer (6) and a servo motor (7); the servo motor (7) is connected to the bearing seat (5) via the reducer (6); the servo motor (7) cooperates with the large speed ratio reducer to output sufficient torque, and drives the telescopic cantilever (3) and the counterweight rod (8) to rotate simultaneously through the bearing seat; and when the telescopic cantilever (3) rotates, the geological radar antenna box (1) is driven to rotate, so that the geological radar antenna box (1) can collect data at different positions; A method for collecting three-dimensional data of tunnel geological radar advance prediction by the device comprises the following steps: Step 1: Tow and move the three-dimensional acquisition device of the tunnel geological radar advance prediction data to a designated position in front of the tunnel face; Step 2, adjusting the telescopic height of the telescopic column (10) according to the actual height of the tunnel face, thereby adjusting the overall height of the three-dimensional acquisition device for advanced prediction data of the tunnel geological radar, so that the geological radar antenna box (1) passes through the data acquisition position required for this test when rotating; Step 3, after the height of the telescopic column (10) is adjusted to the desired position, the supporting foot connecting seat (11) is slid along the telescopic column (10), and the supporting foot connecting seat (11) is rotated around the telescopic column (10) to adjust the height and direction of the supporting foot connecting seat (11), and then the opening angle of the supporting foot (12) is adjusted to make the supporting foot (12) support the entire device in a balanced manner; then, the screw is tightened to lock the height and direction of the supporting foot connecting seat (11); Step 4, adjusting the length of the telescopic cantilever (3) by the action of the cantilever servo motor, so that the telescopic cantilever (3) is extended to a first specified length R1; Then, the driving mechanism drives the telescopic cantilever (3), the counterweight rod (8), the counterweight block (9), the geological radar antenna box (1) and the antenna box mounting plate (2) to form an integral rotating part through the bearing seat (5) to rotate at a controllable and uniform speed; during the rotation of the integral rotating part, the geological radar antenna box (1) synchronously performs data collection, thereby completing data collection in the circumferential direction with R1 as the radius; When the geological radar antenna box (1) rotates one circle, the telescopic cantilever (3) is extended to a second specified length R2, and the telescopic cantilever (3) is rotated one circle again, so that the geological radar antenna box (1) completes data collection in a circumferential direction with R2 as a radius; Similarly, by changing the length of the telescopic cantilever (3) multiple times, the rotation diameter is changed, so that the geological radar antenna box (1) completes data collection in different radii and circumferential directions until the data collection points cover the entire tunnel face, thereby obtaining advanced prediction detection data simulating the entire tunnel face.

2. The three-dimensional acquisition device for advanced prediction data of tunnel geological radar according to claim 1 is characterized in that: The supporting foot (12) is a telescopic supporting foot.

3. The three-dimensional acquisition device for advanced prediction data of tunnel geological radar according to claim 1 is characterized in that: The roller (14) is a rubber roller.

4. The three-dimensional acquisition device for advanced prediction data of tunnel geological radar according to claim 1 is characterized in that: It also includes a control box (13); the control box (13) is electrically connected to the driving mechanism.

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