Deformation monitoring system for staggered slab and formed tunnel between secondary small-clear-distance starting sheet rings of shield tunneling machine

Abstract

The utility model discloses a deformation monitoring system for slab staggering between secondary small-clear-distance starting sheet rings of a shield tunneling machine and a formed tunnel, which belongs to the technical field of formed tunnel monitoring and comprises a plurality of first displacement sensors, a plurality of second displacement sensors, a plurality of third displacement sensors and a plurality of fourth displacement sensors, the second displacement sensors are arranged on the inner wall of a duct piece of the formed tunnel and used for monitoring the deformation condition of the formed tunnel; the plurality of first displacement sensors and the plurality of second displacement sensors are in radio connection with the controller; and the early warning device is electrically connected with the controller, and the early warning device is used for sending out an early warning signal. According to the utility model, slab staggering between segment rings and deformation of a formed tunnel can be monitored in real time, early warning can be given in time, and the construction risk is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of monitoring technology for formed tunnels, specifically relating to a monitoring system for misalignment between the starting segments of a shield machine with a secondary small clearance and deformation of the formed tunnel. Background Technology

[0002] To save on tunnel boring machine (TBM) relocation costs and shorten the construction period, a plan was adopted whereby the TBM (with a auger) would turn around in place at the intermediate ventilation shaft's underground excavation section, and then the auxiliary trolley would lay tracks and move horizontally to the intermediate ventilation shaft's hoisting opening for another turn. Turnouts were laid using the intermediate ventilation shaft and adjacent sections with already completed large-diameter TBM tunnels, allowing the left-line excavation to continue. The TBM would then begin its second launch at the intermediate ventilation shaft for left-line excavation. During construction, there was a risk of deformation in the formed tunnel segments, leading to misalignment and deformation between segment rings, potentially resulting in collapses and casualties.

[0003] To avoid the aforementioned risks, existing technologies often involve marking the segments to monitor changes in inter-ring misalignment and segment deformation. However, this method has low monitoring accuracy, and minor changes are not easily detected in time, preventing construction workers from receiving timely feedback. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A system for monitoring the misalignment between the secondary small-clearance launching segments and the deformation of the formed tunnel in a tunnel boring machine, comprising:

[0006] Multiple first displacement sensors are evenly arranged circumferentially between adjacent segment rings to monitor the changes in misalignment between segment rings;

[0007] Multiple second displacement sensors are installed on the inner wall of the segments of the formed tunnel to monitor the deformation of the formed tunnel;

[0008] The controller, a plurality of the first displacement sensors and a plurality of the second displacement sensors are all wirelessly connected to the controller;

[0009] A warning device, which is electrically connected to the controller, is used to issue a warning signal.

[0010] Furthermore, the first end of the first displacement sensor is connected to one of the adjacent segments, and the second end is connected to the other of the adjacent segments.

[0011] Furthermore, the second displacement sensor is attached to the inner wall of the segment of the formed tunnel.

[0012] Furthermore, multiple second displacement sensors are installed on the 10-ring segment of the tunnel exit.

[0013] Furthermore, at least one mark is provided between adjacent segments, and at least one of the marks is evenly arranged along the circumference of the segment.

[0014] Furthermore, a high-definition camera corresponding to at least one of the marks is installed inside the tube segment, and the high-definition camera is wirelessly connected to the controller.

[0015] Furthermore, it also includes a displacement monitoring module, which comprises multiple displacement gauges, which are spaced apart and distributed at monitoring points within the formed tunnel.

[0016] Furthermore, it also includes multiple inclined insertion tubes, which are inserted into the segments of the formed tunnel and extend to the ground boreholes outside the segments. The outer walls of the inclined insertion tubes are provided with optical fibers. A light source-optical power meter is provided inside the segments of the formed tunnel, and the light source-optical power meter is connected to the optical fibers. The light source-optical power meter is wirelessly connected to the controller.

[0017] Furthermore, the outer wall of the inclined insertion tube is provided with a spiral groove, and the optical fiber is arranged in the spiral groove.

[0018] Beneficial effects:

[0019] This utility model provides a monitoring system for the misalignment between the initial launching segments and the deformation of the formed tunnel in the secondary small clearance of a tunnel boring machine. It can monitor the misalignment between the segments and the deformation of the formed tunnel in real time and provide timely warnings, thereby reducing construction risks. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 A schematic diagram showing the structure for installing a first displacement sensor between adjacent tube segments and a second displacement sensor on the inner wall of the tube segment;

[0022] Among them, 1. Tube segment; 2. Displacement gauge; 3. Inclined tube; 4. Support; 5. High-definition camera; 6. Second displacement sensor; 7. First displacement sensor; 8. Marker. Detailed Implementation

[0023] Example 1

[0024] refer to Figure 1-2 A system for monitoring the misalignment between the secondary small-clearance launching segments and the deformation of the formed tunnel in a tunnel boring machine, comprising:

[0025] Multiple first displacement sensors 7 are evenly arranged circumferentially between adjacent segment rings to monitor the changes in misalignment between segment rings;

[0026] Multiple second displacement sensors 6 are installed on the inner wall of the segment 1 of the formed tunnel to monitor the deformation of the formed tunnel;

[0027] The controller, multiple first displacement sensors 7 and multiple second displacement sensors 6 are all wirelessly connected to the controller;

[0028] The warning device is electrically connected to the controller and is used to issue warning signals.

[0029] In this embodiment, the first end of the first displacement sensor 7 is connected to one of the adjacent segments 1, and the second end is connected to the other of the adjacent segments 1.

[0030] Specifically, when misalignment occurs between adjacent pipe segments, the first or second end of the first displacement sensor 7 is pulled, thereby generating a change in displacement data.

[0031] In this embodiment, the second displacement sensor 6 is attached to the inner wall of the segment 1 of the formed tunnel.

[0032] Specifically, multiple second displacement sensors 6 are arranged in a ring array on the tunnel segment 10.

[0033] More specifically, there are preferably four or six second displacement sensors 6, which are evenly arranged around the circumference of the 10-ring segment of the tunnel.

[0034] In this embodiment, at least one mark 8 is provided between adjacent segments, and at least one of the mark 8 is evenly arranged around the circumference of the segment 1.

[0035] In this embodiment, four markers 8 are evenly arranged between adjacent segment rings. During inspection, the personnel can observe the position changes of the markers 8 to determine whether there is misalignment between adjacent segment rings.

[0036] In this embodiment, the warning device can issue a warning in the form of an audible and visual alarm or a warning bar popping up on the display.

[0037] Example 2

[0038] To improve intelligence and accuracy, this embodiment makes further settings based on embodiment 1.

[0039] In this embodiment, a high-definition camera 5 corresponding to the mark 8 is provided inside the tube 1. The high-definition camera 5 is wirelessly connected to the controller. The high-definition camera 5 is installed on the lower end of the inner wall of the tube 1 through the bracket 4. The high-definition camera 5 is preferably a wide-angle high-definition camera.

[0040] The high-definition camera 5 is preset with a fixed interval time. The high-definition camera 5 takes a picture of the mark 8 once, and the digital processor in the controller processes the image to identify the position of the mark 8. The controller compares the mark 8 with the initial position of the mark 8. When the controller finds that the mark 8 has disappeared in the newly taken picture, or the position of the mark 8 exceeds the set threshold compared with the initial position, the controller sends a signal to the warning device, and the warning device issues a warning signal.

[0041] To improve the accuracy of deformation monitoring and to monitor changes in the surrounding conditions of the formed tunnel in real time, the shield machine secondary small clearance starting segment inter-ring misalignment and the deformation monitoring system of the formed tunnel provided in this embodiment also includes a displacement monitoring module. The displacement monitoring module includes multiple displacement gauges 2, which are spaced apart and dispersedly set at monitoring points in the formed tunnel.

[0042] Specifically, a monitoring point is set at intervals of 5m to 15m, and 8 displacement gauges are set at each monitoring point along the circumference of the tunnel segment to monitor displacement changes in various directions.

[0043] The shield tunneling machine secondary small clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system provided in this embodiment also includes multiple inclined tubes 3. The inclined tubes 3 are inserted into the segments 1 of the forming tunnel and extend to the ground borehole outside the segments 1. The outer wall of the inclined tubes 3 is provided with optical fibers. A light source-optical power meter is provided in the segments 1 of the forming tunnel. The light source-optical power meter is connected to the optical fiber. The light source-optical power meter is wirelessly connected to the controller.

[0044] Specifically, the outer wall of the inclined insertion tube 3 is provided with a spiral groove, and optical fibers are laid in the spiral groove to monitor the changes in the soil around the formed tunnel in real time.

[0045] This embodiment provides a monitoring system for the misalignment between the initial launching segments and the deformation of the formed tunnel in the secondary small clearance of a tunnel boring machine. The system can monitor the misalignment between the segments and the deformation of the formed tunnel in real time and provide timely warnings, thereby reducing construction risks.

[0046] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A system for monitoring the misalignment between the initial launching segments and the deformation of the formed tunnel in a shield tunneling machine with a secondary small clearance, characterized in that, include: Multiple first displacement sensors are evenly arranged circumferentially between adjacent segment rings to monitor the changes in misalignment between segment rings; Multiple second displacement sensors are installed on the inner wall of the segments of the formed tunnel to monitor the deformation of the formed tunnel; The controller, a plurality of the first displacement sensors and a plurality of the second displacement sensors are all wirelessly connected to the controller; A warning device, which is electrically connected to the controller, is used to issue a warning signal.

2. The shield tunneling machine secondary small-clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system according to claim 1, characterized in that, The first end of the first displacement sensor is connected to one of the adjacent segments, and the second end is connected to the other of the adjacent segments.

3. The shield tunneling machine secondary small-clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system according to claim 1, characterized in that, The second displacement sensor is attached to the inner wall of the segment of the formed tunnel.

4. The shield tunneling machine secondary small-clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system according to claim 3, characterized in that, Multiple second displacement sensors are installed on the 10-ring segment of the tunnel.

5. The shield tunneling machine secondary small-clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system according to claim 1, characterized in that, At least one mark is provided between adjacent segments, and at least one mark is evenly arranged along the circumference of the segment.

6. The shield tunneling machine secondary small-clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system according to claim 5, characterized in that, The tube segment is equipped with a high-definition camera corresponding to at least one of the marks, and the high-definition camera is wirelessly connected to the controller.

7. The shield tunneling machine secondary small-clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system according to claim 1, characterized in that, It also includes a displacement monitoring module, which includes multiple displacement gauges, and the multiple displacement gauges are distributed at intervals within the forming tunnel as monitoring points.

8. The shield tunneling machine secondary small-clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system according to claim 1, characterized in that, It also includes multiple inclined tubes, which are inserted into the segments of the formed tunnel and extend to the ground boreholes outside the segments. The outer walls of the inclined tubes are provided with optical fibers. A light source-optical power meter is installed inside the segments of the formed tunnel and is connected to the optical fibers. The light source-optical power meter is wirelessly connected to the controller.

9. The shield tunneling machine secondary small-clearance starting segment inter-ring misalignment and forming tunnel deformation monitoring system according to claim 8, characterized in that, The outer wall of the oblique insertion tube is provided with a spiral groove, and the optical fiber is arranged in the spiral groove.

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