CN211201968U - A monitoring device for tunnel jacking construction guidance - Google Patents

Abstract

The utility model relates to the technical field of tunnel monitoring, in particular to a monitoring device for tunnel jacking construction guidance. The device includes a main jacking cylinder, a pipe jacking machine head, a pipe section, a laser target, a laser light source, a CCD binocular camera, an inclinometer, a controller, a coaxial cable, and a fixed component; the laser light source emits a laser beam to the laser target The inclinometer measures the deflection angle of the CCD binocular camera in real time, and then corrects and processes the image of the laser target collected by the CCD binocular camera to calculate the real-time position information of the pipe jacking machine head during the jacking process. , so as to monitor the tunnel jacking construction guidance, if the deviation is found to exceed the allowable range, it should be corrected in time. The device of the utility model not only has low cost and high precision, but also can continuously and intelligently monitor the tunnel jacking construction guidance for a long time, and the data can also be saved in real time.

Description

A monitoring device for tunnel jacking construction guidance

technical field

The utility model relates to the technical field of tunnel monitoring, in particular to a monitoring device for tunnel jacking construction guidance.

Background technique

Tunnel jacking construction is a mechanized construction method with no or less excavation, which is to overcome the friction between the pipeline and the surrounding soil with the help of the jacking force generated by the jacking equipment in the working pit, and push the pipeline into the soil according to the designed slope. , and transport the earthwork away. After a section of the pipe has been pushed into the soil layer, the second section of the pipe will continue to be pushed in. The principle is to push the tool pipe or the roadheader from the working well through the soil layer to the receiving well by means of the thrust of the main top oil cylinder, the pipeline and the relay room. The pipeline is buried between the two pits immediately after the tool pipe or roadheader.

Jacking construction technology is widely used in the trenchless laying of various pipelines such as urban underground water supply and drainage pipelines, natural gas and oil pipelines, and communication cables in the economically developed coastal areas of my country. It can cross roads, railways, bridges, mountains, rivers, straits and any structures on the ground. With the rapid development of the national economy, the process of urbanization in my country is accelerating. For a long time to come, this technology will be used in domestic urban subway tunnels, hydraulic tunnels, river-crossing tunnels, railway tunnels, highway tunnels, municipal pipelines and other tunnel projects. Construction can not only save a large amount of land acquisition and demolition costs, but also reduce environmental pollution and road blockage, with significant economic and social benefits.

Although the jacking construction technology is mature and widely used, it also has defects. The difficulty of this technology lies in monitoring the excavation direction of the pipe jacking machine and correcting the deviation of the pipe extending underground. At present, the monitoring and guiding technologies of jacking construction include: manual monitoring, theodolite monitoring, measuring robot, and automatic total station monitoring.

1. Manual monitoring method: The traditional manual monitoring is mainly the three-point line shifting method, that is, two vertical lines are hung in the working well, and two vertical lines are drawn on the design center line by two surveyors to make a thin line, so that the thin line is in line with the two. The vertical line is in the same vertical plane to judge the horizontal deviation of the first tube relative to the design center line. The longer the top distance of this method, the lower the accuracy.

2. Theodolite monitoring: when monitoring, use the vertical ball or optical point device to align the center of the instrument with the measuring point of the pipe jacking machine, use the level to level the instrument, use the telescope to aim at the measurement target, use the horizontal dial and vertical dial Determine the horizontal and vertical angles. This method cannot save data in real time, and the complex construction environment can easily lead to large errors.

3. Measuring robot: install a measuring robot at the wellhead, install a reflecting prism on the pipe jacking machine, compile engineering software to control the measuring robot to measure the coordinates of the reflecting prism on the pipe jacking machine, calculate the position and deviation of the pipe jacking machine and display it in real time. However, when the distance between the measuring robot and the pipe jacking machine exceeds 100 meters, the measurement elevation error is too large, and the data accuracy cannot meet the requirements; and the cost of the robot is too high.

4. Automatic monitoring of total station: This monitoring method is mainly completed by prism, angle sensor, total station and computer, and the position of the pipe jacking machine is reversely calculated by monitoring the coordinates and angle of the prism. Disadvantages: higher cost, more hardware, more difficult to install equipment.

Utility model content

In view of the shortcomings of low precision, high cost, long time consumption and the like in the existing monitoring technology, the utility model provides a monitoring device for tunnel jacking construction guidance.

In order to achieve the above object, the technical scheme adopted by the present utility model is as follows:

A monitoring device for tunnel jacking construction guidance, comprising a main jacking oil cylinder and a pipe jacking machine head, the main jacking oil cylinder is placed in a working pit, and a pipe section is arranged in the tunnel; the device also includes a laser target, a laser light source, CCD binocular camera, inclinometer, controller, coaxial cable and fixed components; the laser target is fixed at the center position of the rear end of the pipe jacking machine head; the laser light source is fixed on the main jacking cylinder. on the inner wall; the CCD binocular camera is fixed on the inner wall of the pipe section; the inclinometer is fixed on the CCD binocular camera; the controller communicates with the laser target, The inclinometer, the CCD binocular camera and the laser light source are connected.

Preferably, the laser target adopts a double-layer design, and the surface layer adopts a material with diffuse reflection properties to prevent the interference of other light sources, so that the laser can be imaged on the target within a certain angle range; the second layer adopts a certain mechanical strength. In addition, the size of the laser target is 240mm×240mm, and four LED light sources are arranged at equal distances (200mm) at the four corners of the laser target as calibration points. The laser target is divided into several small squares of 10mm × 10mm for the calibration and calibration of the laser spot.

Preferably, the CCD binocular camera uses two cameras with fixed relative positions to photograph the object, and then calculates the three-dimensional space coordinates of the laser spot through subsequent image processing, correction and analysis, so as to obtain the head of the pipe jacking machine location information.

Preferably, the fixing component includes: a plurality of nail-free glues, three support brackets, and a plurality of expansion bolts, and the support brackets can be fixed by the nail-free glue or the expansion bolts.

Further, the inclinometer is horizontally fixed on the CCD binocular camera by the nail-free glue.

Further, the CCD binocular camera is mounted on the support bracket fixed on the inner wall of the pipe section by the expansion bolt.

Further, the laser target is mounted on the support bracket fixed at the center position of the rear end of the pipe jacking machine head by the nail-free glue.

Further, the laser light source is mounted on the support bracket fixed at the base point of the inner wall of the main top oil cylinder by the nail-free glue.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The device adopted by the utility model is simple in structure, convenient in installation and low in cost;

(2) The device adopted by the utility model can monitor the pipe jacking machine in real time for a long time, continuously and automatically, so as to facilitate the staff to analyze the guidance of tunnel jacking in real time;

(3) The device adopted by the utility model has high precision, and the data can be saved in real time, which is convenient for comparison and analysis.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Figure 2 is a schematic view of the elevation and plane of the laser target;

In the picture: 1—main jacking cylinder, 2—pipe jacking machine head, 3—pipe section, 4—laser target, 5—laser light source, 6—CCD binocular camera, 7—inclinometer, 9—coaxial cable , 10—Nail-free glue, 11—Support bracket, 12—Expansion bolt.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings.

As shown in Figure 1, the monitoring device for tunnel jacking construction guidance disclosed by the present utility model includes a main jacking cylinder 1 and a pipe jacking machine head 2, the main jacking cylinder 1 is placed in a working pit, and a pipe section 3 is arranged in the tunnel; The device also includes a laser target 4, a laser light source 5, a CCD binocular camera 6, an inclinometer 7, a controller 8, a coaxial cable 9, and a fixing component; the laser target 4 is fixed at the center of the rear end of the head 2 of the pipe jacking machine position; the laser light source 5 is fixed on the inner wall of the main top oil cylinder 1; the CCD binocular camera 6 is fixed on the inner wall of the pipe section 3; the inclinometer 7 is fixed on the CCD binocular camera 6; It is connected with the laser target 4 , the inclinometer 7 , the CCD binocular camera 6 and the laser light source 5 .

Preferably, as shown in FIG. 2 , the laser target 4 adopts a double-layer design, and the surface layer adopts a material with diffuse reflection properties to prevent the interference of other light sources, so that the laser can be imaged on the target within a certain angle range; the second layer A steel plate with a certain mechanical strength is used for protection to prevent vibration during construction; in addition, the size of the laser target 4 is 240mm×240mm, and four LED light sources are arranged at equal distances (200mm) at the four corners of the laser target 4 as calibration points , divide the laser target 4 into several small squares of 10mm×10mm for the correction and calibration of the laser spot.

Preferably, as shown in FIG. 1 , the CCD binocular camera 6 uses two cameras with fixed relative positions to photograph the object, and then calculates the three-dimensional spatial coordinates of the laser spot through subsequent image processing, correction, and analysis, so as to obtain the top tube Position information of machine head 2.

Preferably, as shown in FIGS. 1 and 2 , the fixing assembly includes several nail-free glues 10 , three support brackets 11 and several expansion bolts 12 . The support brackets 11 can be fixed by the nail-free glue 10 or expansion bolts 12 .

Further, the inclinometer 7 is horizontally fixed on the CCD binocular camera 6 through the nail-free glue 10; the CCD binocular camera 6 is installed on the support bracket 11 fixed on the inner wall of the pipe section 3 through the expansion bolt 12; the laser target 4 is installed The laser light source 5 is installed on the support bracket 11 fixed at the base point of the inner wall of the main jacking cylinder 1 through the nail-free glue 10 superior.

The method for monitoring the excavation guidance of a pipe jacking machine by using the above monitoring device includes the following steps:

Step 1: Install all instruments and equipment, and use the laser light source 5 to emit a laser beam for initial alignment, positioning, angle adjustment and direction, so that the laser beam emitted by the laser light source 5 is parallel to the tunnel design axis;

Step 2: Before jacking in, first calibrate the inclinometer 7 so that the initial inclination angle of the CCD binocular camera 6 is 0°, and then the CCD binocular camera 6 shoots the laser target 4 for the first time, and the obtained image passes the control The device 8 is transmitted to the computer terminal, and the pre-written program and software are used for computer processing and calculation, that is: after the acquired image is preprocessed (noise reduction, restoration, etc.), firstly locate the four correction points, and then use this The position information of the 4 correction points eliminates the camera distortion, obtains the imaging coordinates of the laser spot in the left and right cameras, and then performs stereo matching on the images obtained by the left and right cameras, and finally obtains the spatial coordinates of the laser spot through calculation and coordinate transformation. 4 is fixed at the head 2 of the pipe jacking machine, then the offset of the laser target 4 develops synchronously with the offset of the head 2 of the pipe jacking machine, so the initial position of the head 2 of the pipe jacking machine can be obtained through the spatial coordinates of the laser spot information;

Step 3: During the jacking process, the CCD binocular camera 6 shoots the laser target 4 in real time (the shooting frequency can be set by yourself, for example, a photo is taken every 15 seconds), and the inclinometer 7 shoots the CCD binocular camera 6. In real-time measurement, since the pipe section 3 may vibrate slightly during the jacking process, the angle of the image captured by the CCD binocular camera 6 will change slightly. The monitoring image is corrected, that is, the positioning information of the four correction points is corrected, and then the real-time position information of the four correction points is used to eliminate the camera distortion, and finally the correct pipe jacking machine head is obtained through a series of processing in step 2. 2 real-time location information;

Step 4: Comparing the changes of the position information before and after the head 2 of the pipe jacking machine can determine the direction of the tunnel jacking construction. If it is found that the deviation exceeds the allowable range, it should be corrected in time.

Claims (8)

1. A monitoring device for tunnel jacking construction guidance, comprising a main jacking oil cylinder (1) and a pipe jacking machine head (2), the main jacking oil cylinder (1) is placed in a work pit, and a pipe section ( 3); the monitoring device for tunnel jacking construction guidance mainly consists of a laser target (4), a laser light source (5), a CCD binocular camera (6), an inclinometer (7), a controller (8), and the same The shaft cable (9) is composed of fixed components; it is characterized in that the laser target (4) is fixed at the center position of the rear end of the pipe jacking machine head (2); the laser light source (5) is fixed on the on the inner wall of the main top oil cylinder (1); the CCD binocular camera (6) is fixed on the inner wall of the pipe section (3); the inclinometer (7) is fixed on the CCD binocular camera (6) ); the controller (8) communicates with the laser target (4), the inclinometer (7), the CCD binocular camera (6) and the laser through the coaxial cable (9) The light source (5) is connected. 2. The monitoring device for tunnel jacking construction guidance according to claim 1, characterized in that: the laser target (4) adopts a double-layer design, and the surface layer adopts a material with diffuse reflection properties to prevent the interference of other light sources, The laser can be imaged on the target within a certain angle range; the second layer is protected by a steel plate with a certain mechanical strength to prevent vibration during construction; in addition, the size of the laser target (4) is 240mm×240mm , four LED light sources are arranged at equal distances (200mm) at the four corners of the laser target (4) as calibration points, and the laser target (4) is divided into several small squares of 10mm×10mm for the laser spot Calibration and calibration. 3. The monitoring device for tunnel jacking construction guidance according to claim 1, characterized in that: the CCD binocular camera (6) utilizes two cameras with fixed relative positions to photograph the object, and then passes subsequent image processing. , correcting, analyzing and calculating the three-dimensional space coordinates of the laser spot, so as to obtain the position information of the head (2) of the pipe jacking machine. 4 . The monitoring device for tunnel jacking construction guidance according to claim 1 , wherein the fixing assembly comprises: several nail-free glues (10), three support brackets (11), and expansion bolts (12). 5 . Several; the support bracket (11) can be fixed by the nail-free glue (10) or the expansion bolt (12). 5 . The monitoring device for tunnel jacking construction guidance according to claim 4 , wherein the inclinometer ( 7 ) is horizontally fixed to the CCD binocular camera ( 6 ) through the nail-free glue ( 10 ). 6 . superior. 6 . The monitoring device for tunnel jacking construction guidance according to claim 4 , wherein the CCD binocular camera ( 6 ) is mounted on the pipe section ( 3 ) through the expansion bolt ( 12 ). 7 . on the support bracket (11) on the inner wall. 7 . The monitoring device for tunnel jacking construction guidance according to claim 4 , wherein the laser target ( 4 ) is installed on the head of the pipe jacking machine through the nail-free glue ( 10 ). 8 . (2) on the support bracket (11) at the center position of the rear end. 8 . The monitoring device for tunnel jacking construction guidance according to claim 4 , wherein the laser light source ( 5 ) is installed on the main jacking cylinder ( 1 ) fixed by the nail-free glue ( 10 ). 9 . on the support bracket (11) at the base point of the inner wall.

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