A tunnel excavation section geological radar data acquisition system and detection method

Abstract

The invention relates to the technical field of tunnel construction, and in particular to a geological radar data acquisition system and a detection method for a tunnel excavation section; the system comprises a transport vehicle, an integrated control box is provided on the transport vehicle, the integrated control box is connected with a fixed crossbeam and a sliding rod, the fixed crossbeam is fixedly connected with a prefabricated track laid on the section at the same time, the sliding rod is fixedly connected with a detection pulley at the same time, and the detection pulley slides between two adjacent prefabricated tracks laid on the section; the detection pulley is provided with a geological radar antenna and a plurality of retractable contacts, the contacts are in contact with the section and are electrically connected with the geological radar antenna, and the geological radar antenna is also communicatively connected with an integrated controller in the integrated control box at the same time; the scheme can realize the semi-automatic, high-quality acquisition of geological radar non-destructive detection data of a tunnel excavation section, and can also realize the simultaneous non-destructive data acquisition and detection of multiple survey lines, thereby realizing standardization and improving the quality of data acquisition and the accuracy of data location information.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to a tunnel excavation section geological radar data acquisition system and a detection method. Background Art

[0002] In recent years, tunnel excavation and new construction work in my country is in full swing. With the increasing density of tunnel construction network, the probability of tunnel excavation through complex geological conditions is gradually increasing. How to ensure the safe and orderly progress of tunnel excavation in complex and adverse geological environments is the key and difficult problem currently faced. Nondestructive testing technology is a method that can detect the structure, state and type, shape, position, size, distribution and changes of defects inside and on the surface of the structure by using physical means and modern technology and equipment, without excavating and destroying the structure and affecting its properties. Compared with traditional drilling methods, nondestructive testing has the advantages of high efficiency, small disturbance and strong visualization, and geological radar detection is one of the commonly used methods for detecting excavation sections and deep structures in tunnel excavation.

[0003] At present, in the process of tunnel excavation, the method of detecting the excavation section by means of geological radar nondestructive testing mainly adopts multi-person collaborative handheld detection. Its disadvantages are that the degree of fit of the radar antenna to the detection section is uneven during the manual handheld detection process, the movement speed of the radar antenna is inconsistent, the air interlayer is easy to exist at the undulating section of the section, affecting the data quality, the professional level of the detection personnel and other human factors are large, more personnel are required and the efficiency is low. If the geological radar nondestructive testing of the tunnel excavation section can be realized through standardized and mechanized operation without disturbing the electromagnetic waves of the geological radar, the detection efficiency of the tunnel excavation section will be greatly improved, the quality of the acquired data will be improved, and the accuracy of the detection will be further improved. Therefore, the research and promotion of the mechanized data acquisition system suitable for the geological radar nondestructive testing of the tunnel excavation section is of great significance to improving the safety and work efficiency of tunnel excavation. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a tunnel excavation section geological radar data acquisition system and detection method, which can effectively improve the detection efficiency and detection accuracy, improve the quality of acquired data, reduce the influence of human factors, and improve the overall safety and work efficiency of tunnel excavation.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: the system comprises a transport vehicle, the transport vehicle is provided with an integrated control box, the integrated control box is connected with a fixed beam and a slide bar, the fixed beam is fixedly connected with a prefabricated track laid on the section, the slide bar is fixedly connected with a detection pulley, and the detection pulley slides between two adjacent prefabricated tracks laid on the section;

[0006] The detection pulley is provided with a geological radar antenna and a plurality of retractable contacts, the contacts are in contact with the cross section and are electrically connected to the geological radar antenna, and the geological radar antenna is also communicatively connected to the integrated controller in the integrated control box.

[0007] Furthermore, the transport vehicle is provided with a plurality of hydraulic balancing support devices.

[0008] Furthermore, the prefabricated track is formed by combining and splicing a plurality of arc-shaped tracks.

[0009] Furthermore, corresponding fixing holes and positioning holes are respectively provided at both ends of the arc-shaped track, and two adjacent arc-shaped tracks are connected by pins passing through the fixing holes and the positioning holes.

[0010] Furthermore, the integrated control box is connected to a main shaft that can rotate in a horizontal plane, the main shaft includes a telescopic fixed shaft section and a rotatable driving shaft section, the fixed crossbeam is connected to the fixed shaft section, and the sliding rod is connected to the driving shaft section.

[0011] The integrated control box is connected to a horizontally arranged extension guide rod, and the slide rod slides on the extension guide rod.

[0012] Furthermore, the prefabricated track includes tracks on two sides perpendicular to the cross-sectional direction, and the detection trolley includes a body and rollers arranged on both sides of the body, and the rollers roll in the track.

[0013] Furthermore, the fixed crossbeam and the sliding rod are both retractable.

[0014] Furthermore, the prefabricated track is formed by combining and splicing a plurality of arc-shaped tracks and linear tracks.

[0015] The above-mentioned detection method of the tunnel excavation section geological radar data acquisition system comprises the following steps:

[0016] S1: Assembling the prefabricated track designed for the excavation section and radar survey line type outside the tunnel and fixing it on the fixed beam;

[0017] S2: driving the transport vehicle to transport the fixed prefabricated track to the vicinity of the tunnel excavation section, and placing the prefabricated track close to the excavation section;

[0018] S3: Fixing the geological radar antenna on the detection trolley, clamping the detection trolley in the prefabricated track, and manipulating the slide bar to stably support the detection trolley and slide it in the prefabricated track;

[0019] S4: Connect the geological radar antenna and the integrated controller;

[0020] S5: applying a certain amount of axial pressure and / or angular velocity to the slide bar, pushing the detection pulley to move at a constant speed in the prefabricated track, and collecting geological radar nondestructive testing data and maps of the tunnel excavation section;

[0021] S6: After the integrated controller analyzes the collected data, the fixed beam and the sliding rod are retracted, and the transport vehicle is driven away from the tunnel excavation section to wait for the next inspection and repeat the above steps.

[0022] Compared with the existing technology, this solution has the following significant advantages:

[0023] This solution can realize semi-automatic, high-quality collection of geological radar non-destructive testing data of tunnel excavation sections, and can also realize simultaneous non-destructive data collection and testing of multiple survey lines, achieving standardization while improving the quality of data collection and the accuracy of data location information. This solution minimizes manpower and can achieve uninterrupted testing of the entire tunnel excavation section by a single person. The integrated controller can conduct in-depth analysis and processing of the collected data, give a preliminary judgment of the non-destructive testing results, and guide the next step of on-site tunnel excavation construction, providing intelligent, scientific, and efficient testing equipment for high-quality information collection, and providing scientific and feasible equipment and solutions for the efficient non-destructive testing of tunnel excavation sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the structure of the arc track;

[0026] Figure 2-Figure 3 It is a schematic diagram of the structure of the prefabricated track in Example 1;

[0027] Figure 4-Figure 5 It is a schematic diagram of the structure of the prefabricated track in Example 2;

[0028] Figure 6It is a schematic diagram of the structure of the detection pulley;

[0029] Figure 7-Figure 9 It is a structural schematic diagram of the overall device in Example 1;

[0030] Fig.10 Another structural schematic diagram of the detection pulley;

[0031] Figure 11-13 It is a structural schematic diagram of the overall device in Example 2;

[0032] In the figure: 1-arc track; 2-pin; 3-positioning hole; 4-fixing hole; 5-body; 6-roller; 7-placing box; 8-buckle; 9-contact; 10-guide rail; 11-prefabricated track; 12-integrated control box; 13-spindle; 14-fixed beam; 15-slide bar; 16-integrated controller; 17-trolley; 18-hydraulic balancing support device; 19-extended guide rod. DETAILED DESCRIPTION

[0033] The preferred examples of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred examples described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0034] The tunnel excavation section geological radar data acquisition system of the present invention comprises a prefabricated track 11 laid on the section, and the prefabricated track 11 can be formed by combining and splicing a plurality of arc tracks 1, or by combining and splicing a plurality of arc tracks 1 and a linear track.

[0035] Example 1: Figure 1 As shown, the two ends of the arc track 1 are respectively provided with corresponding fixing holes 4 and positioning holes 3. In this embodiment, there are three fixing holes 4 and three positioning holes 3, respectively. Thus, two adjacent arc tracks 1 can be connected by pins 2 penetrating the fixing holes 4 on the previous arc track 1 and the positioning holes 3 on the next arc track 1, and after multiple arc tracks 1 are combined and spliced, a prefabricated track 11 with an overall annular shape is formed. On this basis, as Figure 2 and Figure 3 As shown, by using a plurality of arc tracks 1 of different sizes, a plurality of concentric arc tracks 1 can be combined.

[0036] Example 2: Figure 4 and Figure 5 As shown, in this embodiment, the prefabricated track 11 includes not only a curved track 1, but also a plurality of straight tracks. After the plurality of curved tracks 1 are spliced ​​together to form a ring, a plurality of straight tracks are also fixed on the ring formed by the plurality of curved tracks 1 in parallel and at equal intervals by pins.

[0037] In both the first embodiment and the second embodiment, the prefabricated track 11 includes guide rails 10 on both sides perpendicular to the cross-sectional direction, and a detection pulley is provided in the track 10 for clamping. Figure 6 As shown, the detection trolley includes a body 5 and rollers 6 arranged on both sides of the body 5, and the rollers 6 are stuck in the track 10 and roll. It can be seen that in Example 1, the detection trolley can make circular motion in two adjacent prefabricated tracks 11 with different radii; and in Example 2, the detection trolley can make linear motion in two upper and lower adjacent prefabricated tracks 11. In more cases, the staff can also customize prefabricated tracks 11 of different shapes and sizes according to the actual cross-sectional conditions, such as semicircular ring tracks, two-thirds circular tracks and elliptical tracks, etc., and assemble them through segmented mortise and tenon method to achieve flexible measurement lines and efficient detection with a wide range of applications.

[0038] The following continues to describe Example 1: Figure 7-9 As shown, the device further comprises a transport vehicle 17 , an integrated control box 12 is provided at the rear of the transport vehicle 17 , and an integrated controller 16 is provided inside the integrated control box 12 .

[0039] A main shaft 13 that can rotate in a horizontal plane is connected to the back of the integrated control box 12. The main shaft 13 includes a retractable fixed shaft section and a rotatable drive shaft section. The fixed shaft section is connected to a fixed crossbeam 14, which is usually arranged horizontally, and the fixed shaft section is usually closest to the integrated control box 12. In this embodiment, the fixed crossbeam 14 is L-shaped, one end of which is connected to the fixed shaft section, and the other end is connected to the prefabricated track 11 laid on the section, so as to fix the prefabricated track 11.

[0040] The driving shaft section is connected to a slide bar 15, which is used to be fixedly connected to the detection pulley sliding between the prefabricated rails 11. In this embodiment, the slide bar 15 is also L-shaped, and the driving shaft section is usually located away from the integrated control box 12.

[0041] Therefore, in this embodiment, the prefabricated track 11 is fixed by the fixed crossbeam 14, and the slide rod 15 drives the detection pulley to perform circular motion by rotation, thereby realizing the radar data collection of the cross section.

[0042] In terms of radar data collection, Fig.10As shown, the detection pulley is also provided with a placement box and a plurality of retractable contacts 9, and the plurality of contacts 9 are closely arranged and in contact with the section. The contacts 9, prefabricated tracks 11, main shafts 13, detection pulleys and other components are all made of non-conductive polystyrene hard plastic. When encountering uneven curved surfaces, under different compressive forces, the contacts 9 can be automatically adjusted under force and retracted, and fit tightly with the uneven surface. A geological radar antenna fixed by a buckle 8 is also provided in the placement box 7. The contacts 9 are electrically connected to the geological radar antenna at the same time, and the geological radar antenna is also communicated with the integrated controller 16 in the integrated control box 12. Therefore, as the contacts 9 pass through the section, the electromagnetic waves emitted by the geological radar antenna reach the detection excavation surface through the complete non-air medium, and finally the integrated controller 16 performs non-destructive data monitoring of the geological radar, thereby improving the quality of the obtained map.

[0043] The following describes Example 2. Figure 11-13 As shown, in this embodiment, the integrated control box 12 is connected to a plurality of horizontally arranged extension guide rods 19, and the slide bar 15 slides on the extension guide rods 19, thereby driving the detection pulley to perform horizontal linear motion. In other cases, the extension guide rods 19 may not be horizontal, and the movement direction of the detection pulley may not be horizontal.

[0044] In general, the transport vehicle 17 is also provided with a plurality of hydraulic balancing support devices 18; the fixed cross beam 14 and the slide bar 15 are both retractable, thereby further expanding the scope of application and being used in different environments.

[0045] Taking Example 1 as an example, the steps for using the device are as follows:

[0046] S1: Assemble the prefabricated track 11 designed for the excavation section and radar survey line type outside the tunnel and fix it on the fixed beam 14;

[0047] S2: Drive the transport vehicle 17 to transport the fixed prefabricated track 11 to the vicinity of the tunnel excavation section, the hydraulic balance support device 18 below maintains the balance of the transport vehicle 17, and controls the main shaft 13 to make the prefabricated track 11 close to the excavation section;

[0048] S3: Fix the geological radar antenna in the placement box 7, put the placement box into the detection pulley, clamp the detection pulley in the prefabricated track 11, and control the driving shaft section of the main shaft 13 to rotate, so that the slide bar 15 stably supports the detection pulley and slides in the prefabricated track 11;

[0049] S4: Connect the geological radar antenna and the integrated controller 16;

[0050] S5: Control the main shaft 13 to apply a certain amount of axial pressure and angular velocity (lateral and longitudinal velocities in Example 2) to the slide bar 15, push the detection pulley to move at a constant speed in the prefabricated track 11, and collect geological radar nondestructive testing data and maps of the tunnel excavation section;

[0051] S6: After the integrated controller 16 analyzes the collected data, the main shaft 13 is operated to retract the fixed beam 14 and the slide rod 15 at a constant speed, the hydraulic balance support device 18 is retracted, and the transport vehicle 17 is driven away from the tunnel excavation section to wait for the next inspection and repeat the above steps.

[0052] This solution can realize semi-automatic, high-quality collection of geological radar non-destructive testing data of tunnel excavation sections, and can also realize simultaneous non-destructive data collection and testing of multiple survey lines, achieving standardization while improving the quality of data collection and the accuracy of data location information. This solution minimizes manpower and can achieve uninterrupted testing of the entire tunnel excavation section by a single person. The integrated controller 16 can conduct in-depth analysis and processing of the collected data, give a preliminary judgment of the non-destructive testing results, and guide the next step of on-site tunnel excavation construction, providing intelligent, scientific, and efficient testing equipment for high-quality information collection, and providing scientific and feasible equipment and solutions for the efficient non-destructive testing of tunnel excavation sections.

[0053] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tunnel excavation section geological radar data acquisition system, characterized in that: The system includes a transport vehicle, on which an integrated control box is provided, the integrated control box is connected to a fixed beam and a slide bar, the fixed beam is fixedly connected to a prefabricated track laid on the section, the slide bar is fixedly connected to a detection pulley, and the detection pulley slides between two adjacent prefabricated tracks laid on the section; The detection pulley is provided with a geological radar antenna and a plurality of retractable contacts, the contacts are in contact with the cross section and are electrically connected to the geological radar antenna, and the geological radar antenna is also communicatively connected to the integrated controller in the integrated control box; The prefabricated track is formed by combining and splicing a plurality of arc-shaped tracks and / or linear tracks; The two ends of the arc track are respectively provided with corresponding fixing holes and positioning holes, and two adjacent arc tracks are connected by pins passing through the fixing holes and the positioning holes; The integrated control box is connected to a main shaft that can rotate in a horizontal plane, the main shaft includes a retractable fixed shaft section and a rotatable driving shaft section, the fixed crossbeam is connected to the fixed shaft section, and the sliding rod is connected to the driving shaft section; The integrated control box is connected to a horizontally arranged extension guide rod, and the slide rod slides on the extension guide rod; The prefabricated track includes tracks on both sides perpendicular to the cross-sectional direction, and the detection trolley includes a body and rollers arranged on both sides of the body, and the rollers roll in the track; The contact, prefabricated track, main shaft and detection pulley are all made of non-conductive polystyrene hard plastic. When encountering an uneven curved surface, the contact can automatically adjust its extension and contraction under different compressive forces and fit tightly with the uneven surface.

2. The tunnel excavation section geological radar data acquisition system according to claim 1 is characterized in that: The transport vehicle is provided with a plurality of hydraulic balancing support devices.

3. The tunnel excavation section geological radar data acquisition system according to claim 1 is characterized in that: The fixed crossbeam and the sliding rod are both retractable.

4. The detection method of the tunnel excavation section geological radar data acquisition system according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: S1: Assembling the prefabricated track designed for the excavation section and radar survey line type outside the tunnel and fixing it on the fixed beam; S2: driving the transport vehicle to transport the fixed prefabricated track to the vicinity of the tunnel excavation section, and placing the prefabricated track close to the excavation section; S3: Fixing the geological radar antenna on the detection trolley, clamping the detection trolley in the prefabricated track, and manipulating the slide bar to stably support the detection trolley and slide it in the prefabricated track; S4: Connect the geological radar antenna and the integrated controller; S5: applying a certain amount of axial pressure and / or angular velocity to the slide bar, pushing the detection pulley to move at a constant speed in the prefabricated track, and collecting geological radar nondestructive testing data and maps of the tunnel excavation section; S6: After the integrated controller analyzes the collected data, the fixed beam and the sliding rod are retracted, and the transport vehicle is driven away from the tunnel excavation section to wait for the next inspection and repeat the above steps.

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