CN211201968U

CN211201968U - Monitoring device for tunnel jacking construction guide

Info

Publication number: CN211201968U
Application number: CN201921650309.XU
Authority: CN
Inventors: 胡启军; 冯紫媛; 何乐平; 张成勇; 桂胜利; 刘学霸
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-08-07
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to a tunnel monitoring technology field especially relates to a monitoring devices of tunnel jacking construction direction. The device comprises a main jacking oil cylinder, a pipe jacking machine head, a pipe joint, a laser target, a laser light source, a CCD binocular camera, an inclinometer, a controller, a coaxial cable and a fixing assembly; the laser source sends a laser beam to the laser target, the inclinometer measures the deflection angle of the CCD binocular camera in real time, then the image of the laser target collected by the CCD binocular camera is corrected and processed, the real-time position information of the head of the push bench in the pushing process can be calculated, so that the tunnel pushing construction guidance is monitored, and if the deviation is found to exceed the allowable range, the deviation is corrected in time. Adopt the utility model discloses a device, not only with low costs, precision are high to can monitor the tunnel in succession intelligently for a long time and advance the construction direction, data can also preserve in real time.

Description

Monitoring device for tunnel jacking construction guide

Technical Field

The utility model relates to a tunnel monitoring technology field especially relates to a monitoring devices of tunnel jacking construction direction.

Background

The tunnel jacking construction is a mechanized construction method without excavation or with less excavation, namely, the friction force between a pipeline and the surrounding soil is overcome by means of jacking force generated by jacking equipment in a working pit, the pipeline is jacked into the soil according to a designed gradient, and earthwork is carried away. After one section of pipe is pushed into the soil layer, the second section of pipe is pushed into the soil layer continuously. The principle is that by means of the thrust of the main jacking oil cylinder, the thrust between pipelines, the thrust between relays and the like, a tool pipe or a heading machine is pushed from a working well through a soil layer until the tool pipe or the heading machine is hoisted in a receiving well. The pipeline is buried between the two pits after following the tool pipe or the heading machine.

The jacking construction technology is widely applied to trenchless laying of various pipelines such as urban underground water supply and drainage pipelines, natural gas and petroleum pipelines, communication cables and the like in coastal economically developed areas of China. It can cross roads, railways, bridges, mountains, rivers, straits and any buildings on the ground. With the rapid development of national economy, the urbanization process of China is accelerated continuously, and in a quite long period in future, tunnel projects such as domestic urban subway tunnels, hydraulic tunnels, river-crossing tunnels, railway tunnels, highway tunnels, municipal pipelines and the like are constructed by adopting the technology, so that not only can a large amount of expropriation and removal cost be saved, but also the environmental pollution and the road blockage can be reduced, and the economic benefit and the social benefit are remarkable.

Although the jacking construction technology is mature and widely applied, the technology has the defects that the difficulty is in monitoring the excavation guiding of the pipe jacking machine and correcting the deviation of the underground extension of the pipe. The monitoring and guiding technology of the existing jacking construction comprises the following steps: manual monitoring, theodolite monitoring, measuring robots, total station automatic monitoring and the like.

1. The manual monitoring method comprises the following steps: the traditional manual monitoring method is mainly a three-point line shifting method, namely two vertical lines are hung in a working well, a thin line is pulled by two measurers on a design central line by the two vertical lines, so that the thin line and the two vertical lines are in the same vertical plane to judge the horizontal deviation of a first-section pipe relative to the design central line, and the longer the jacking distance is, the lower the precision is.

2. And (3) theodolite monitoring: during monitoring, the center of the instrument is aligned to a measuring point of a push bench by a plumb bob or an optical plummet, the instrument is leveled by a level gauge, a measuring target is aimed by a telescope, and a horizontal dial and a vertical dial are used for measuring a horizontal angle and a vertical angle. The method cannot store data in real time, and large errors are easily caused in complex construction environments.

3. The measuring robot comprises: a measuring robot is installed at the wellhead, a reflecting prism is installed on the pipe pushing jack, engineering software is programmed to control the measuring robot to measure the coordinate of the reflecting prism on the pipe pushing jack, the position and the deviation of the pipe pushing jack are calculated, and real-time display is carried out. 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 requirement; and the cost of the robot is too high.

4. And (3) automatic monitoring by a total station: the monitoring method is mainly completed by a prism, an angle sensor, a total station and a computer, and the position of the push bench is reversely calculated by monitoring the coordinate and the angle of the prism. The disadvantages are as follows: the cost is higher, the hardware is more, and the installation equipment is more difficult.

SUMMERY OF THE UTILITY MODEL

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

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a monitoring device for tunnel jacking construction guiding comprises a main jacking oil cylinder and a pipe jacking machine head, wherein the main jacking oil cylinder is placed in a working pit, and a pipe joint is arranged in a tunnel; the device also comprises a laser target, a laser light source, a CCD binocular camera, an inclinometer, a controller, a coaxial cable and a fixing component; the laser target is fixed at the center of the rear end of the head of the push bench; the laser light source is fixed on the inner wall of the main jacking oil cylinder; the CCD binocular camera is fixed on the inner wall of the pipe joint; the inclinometer is fixed on the CCD binocular camera; the controller is connected with the laser target, the inclinometer, the CCD binocular camera and the laser light source through the coaxial cable.

Preferably, the laser target is of a double-layer design, the surface layer is made of materials with diffuse reflection properties, interference of other light sources is prevented, laser can form images on the target within a certain angle range, the second layer is protected by a steel plate with certain mechanical strength, vibration in the construction process is prevented, in addition, the size of the laser target is 240mm × 240mm, 4L ED light sources are distributed at four corners of the laser target at equal intervals (200mm) to serve as correction points, and the laser target is divided into a plurality of 10mm × 10mm small grids for correction and calibration of laser spots.

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, thereby obtaining the position information of the head of the push bench.

Preferably, the fixing assembly includes: the support bracket comprises a plurality of nail-free glue, three support brackets and a plurality of expansion bolts, wherein the support brackets can be fixed through the nail-free glue or the expansion bolts.

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

Furthermore, the CCD binocular camera is arranged on the bracket which is fixed on the inner wall of the pipe joint through the expansion bolt.

Furthermore, the laser target is arranged on the bracket which is fixed at the central position of the rear end of the head of the push bench through the nail-free glue.

Furthermore, the laser light source is arranged on the bracket which is fixed at the base point of the inner wall of the main jacking oil cylinder through the nail-free glue.

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

⑴ the utility model has simple structure, convenient installation and low cost;

⑵ the utility model can monitor the pipe jacking machine continuously and automatically in real time for a long time, so that the workers can analyze the guidance of the tunnel jacking in real time;

⑶ the utility model discloses the device precision that adopts is high, and data can be preserved in real time, the contrast and the analysis of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic elevational, plan view of a laser target;

in the figure: the system comprises a main jacking oil cylinder 1, a pipe jacking machine head 2, a pipe joint 3, a laser target 4, a laser light source 5, a CCD binocular camera 6, an inclinometer 7, a coaxial cable 9, a nail-free glue 10, a bracket 11 and an expansion bolt 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a monitoring device for tunnel jacking construction guidance, which comprises a main jacking oil cylinder 1 and a pipe jacking machine head 2, wherein the main jacking oil cylinder 1 is placed in a working pit, and a pipe joint 3 is arranged in the tunnel; the device also comprises 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 pipe jacking machine head 2; the laser light source 5 is fixed on the inner wall of the main jacking oil cylinder 1; the CCD binocular camera 6 is fixed on the inner wall of the pipe joint 3; the inclinometer 7 is fixed on the CCD binocular camera 6; the controller 8 is connected with the laser target 4, the inclinometer 7, the CCD binocular camera 6 and the laser light source 5 through a coaxial cable 9.

Preferably, as shown in fig. 2, the laser target 4 is of a double-layer design, the surface layer is made of materials with diffuse reflection properties, interference of other light sources is prevented, laser can form images on the target within a certain angle range, the second layer is protected by a steel plate with certain mechanical strength, vibration in the construction process is prevented, in addition, the size of the laser target 4 is 240mm × 240mm, 4L ED light sources are distributed at four corners of the laser target 4 at equal intervals (200mm) to serve as correction points, and the laser target 4 is divided into a plurality of 10mm × 10mm small squares for correction and calibration of laser spots.

Preferably, as shown in fig. 1, the CCD binocular camera 6 captures an object by using two cameras with fixed relative positions, and then calculates the three-dimensional space coordinates of the laser spot through subsequent image processing, correction and analysis, thereby obtaining the position information of the push bench head 2.

Preferably, as shown in fig. 1 and 2, the fixing assembly includes: the nail-free glue comprises a plurality of nail-free glue 10, three brackets 11 and a plurality of expansion bolts 12, wherein the brackets 11 can be fixed through the nail-free glue 10 or the expansion bolts 12.

Further, the inclinometer 7 is horizontally fixed on the CCD binocular camera 6 through nail-free glue 10; the CCD binocular camera 6 is arranged on a bracket 11 which is fixed on the inner wall of the pipe joint 3 through an expansion bolt 12; the laser target 4 is arranged on a bracket 11 which is fixed at the central position of the rear end of the pipe jacking machine head 2 through nail-free glue 10; the laser light source 5 is arranged on a bracket 11 which is fixed on the base point of the inner wall of the main top oil cylinder 1 through a nail-free glue 10.

The method for monitoring the pipe jacking machine excavation guiding by using the monitoring device comprises the following steps:

step 1: installing and erecting all instrument equipment, and performing initial alignment, positioning, angle adjustment and direction by using laser beams emitted by the laser light source 5 to enable the laser beams emitted by the laser light source 5 to be parallel to the designed axis of the tunnel;

step 2: before jacking, firstly calibrating the inclinometer 7 to enable the initial inclination angle of the CCD binocular camera 6 to be 0 degree, then shooting the laser target 4 for the first time by the CCD binocular camera 6, transmitting the obtained image to a computer terminal through a controller 8, and utilizing a pre-programmed program and software to carry out computer understanding calculation, namely: after the acquired image is preprocessed (noise reduction, restoration and the like), firstly, 4 correction points are positioned, then, the camera distortion is eliminated by utilizing the position information of the 4 correction points, imaging coordinates of laser spots in a left camera and a right camera are obtained, then, the images acquired by the left camera and the right camera are subjected to stereo matching, finally, the space coordinate of the laser spots is obtained through calculation and coordinate transformation, and as the laser target 4 is fixed at the head 2 of the push bench, the offset of the laser target 4 and the offset of the head 2 of the push bench are synchronously developed, so that the initial position information of the head 2 of the push bench can be obtained through the space coordinate of the laser spots;

and step 3: in the jacking process, the CCD binocular camera 6 shoots the laser target 4 in real time (shooting frequency can be set by itself, for example, one picture can be shot every 15 seconds), the inclinometer 7 measures the CCD binocular camera 6 in real time, and the angle of the image shot by the CCD binocular camera 6 is slightly changed due to possible slight vibration of the pipe joint 3 in the jacking process, so that the data measured by the inclinometer 7 is used for correcting the monitored image acquired by the CCD binocular camera 6, namely the positioning information of 4 correction points is corrected, the real-time position information of the 4 correction points is used for eliminating camera distortion, and finally the correct real-time position information of the pipe jacking machine head 2 is obtained through a series of processing in the step 2;

and 4, step 4: the guiding of the tunnel jacking construction can be determined by comparing the change of the position information of the pipe jacking machine head 2 at the front and back moments, and if the deviation is found to exceed the allowable range, the deviation correction is carried out in time.

Claims

1. A monitoring device for tunnel jacking construction guiding comprises a main jacking oil cylinder (1) and a pipe jacking machine head (2), wherein the main jacking oil cylinder (1) is placed in a working pit, and a pipe joint (3) is arranged in a tunnel; the monitoring device for the tunnel jacking construction guide mainly comprises 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 pipe jacking machine head (2); the laser light source (5) is fixed on the inner wall of the main jacking oil cylinder (1); the CCD binocular camera (6) is fixed on the inner wall of the pipe joint (3); the inclinometer (7) is fixed on the CCD binocular camera (6); the controller (8) is connected with the laser target (4), the inclinometer (7), the CCD binocular camera (6) and the laser light source (5) through the coaxial cable (9).

2. The device for monitoring the tunnel jacking construction guidance according to claim 1, wherein the laser target (4) is of a double-layer design, the surface layer is made of a material with a diffuse reflection property, interference of other light sources is prevented, so that laser can form images on the target within a certain angle range, the second layer is protected by a steel plate with certain mechanical strength, vibration in the construction process is prevented, in addition, the size of the laser target (4) is 240mm × 240mm, 4L ED light sources are distributed at four corners (200mm) of the laser target (4) at equal intervals to serve as correction points, and the laser target (4) is divided into a plurality of small grids of 10mm × 10mm for correction and calibration of laser spots.

3. The apparatus for monitoring guidance in tunnel jacking construction according to claim 1, wherein: the CCD binocular camera (6) is used for shooting an object by utilizing two cameras with fixed relative positions, and then the three-dimensional space coordinate of a laser spot is calculated through subsequent image processing, correction and analysis, so that the position information of the pipe jacking machine head (2) is obtained.

4. The apparatus for monitoring guidance in tunnel jacking construction according to claim 1, wherein: the fixing assembly includes: a plurality of nail-free glue (10), three bracket supports (11) and a plurality of expansion bolts (12); the bracket (11) can be fixed by the nail-free glue (10) or the expansion bolt (12).

5. The apparatus for monitoring guidance in tunnel jacking construction according to claim 4, wherein: the inclinometer (7) is horizontally fixed on the CCD binocular camera (6) through the nail-free glue (10).

6. The apparatus for monitoring guidance in tunnel jacking construction according to claim 4, wherein: the CCD binocular camera (6) is installed on the support bracket (11) which is fixed on the inner wall of the pipe joint (3) through the expansion bolt (12).

7. The apparatus for monitoring guidance in tunnel jacking construction according to claim 4, wherein: the laser target (4) is arranged on the bracket (11) which is fixed at the central position of the rear end of the pipe jacking machine head (2) through the nail-free glue (10).

8. The apparatus for monitoring guidance in tunnel jacking construction according to claim 4, wherein: the laser light source (5) is arranged on the support bracket (11) which is fixed on the base point of the inner wall of the main jacking oil cylinder (1) through the nail-free glue (10).