A safety monitoring device for subway tunnel construction

Abstract

The present application relates to the technical field of tunnel safety disease monitoring, and specifically discloses a safety monitoring device for subway tunnel construction, which comprises a rectangular annular framework, two rectangular annular elastic sealing rings fixedly connected to the lower side of the framework, a cavity formed between the framework and the two elastic sealing rings, a pipe joint arranged on one side of the framework, a support fixedly connected to the upper side of the framework, and a trachea slidably connected to the central hole of the support. The safety monitoring device for subway tunnel construction has the beneficial effect that the water permeability of the tunnel is monitored through the active water injection test, and the individual regions can be gradually monitored. The displacement deformation of the shield segment can be monitored at the same time of the water permeability monitoring, thereby improving the safety of the tunnel construction.

Description

Technical Field

[0001] This invention relates to the field of tunnel safety defect monitoring technology, and in particular to a safety monitoring device for subway tunnel construction. Background Technology

[0002] A tunnel is an engineering structure buried underground, representing a form of human utilization of underground space. Tunnels can be categorized into traffic tunnels, hydraulic tunnels, municipal tunnels, mining tunnels, and military tunnels. The tunnel structure comprises two parts: the main structure and auxiliary equipment. The main structure consists of the tunnel body and portals, while auxiliary equipment includes passing bays, fire-fighting facilities, emergency communication systems, and drainage systems. Longer tunnels also have specialized ventilation and lighting equipment. Tunnels constructed using the shield tunneling method are prone to various types of safety defects, the most significant being water seepage, specifically whether water leaks through the gaps in the shield tunnel segments. Monitoring for water seepage in the shield tunnel segment gaps involves installing water sensors at the gaps. When seepage occurs, the sensors trigger an alarm. This method is passive monitoring, and the location of seepage may be uncertain, requiring a high density of sensors. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a safety monitoring device for subway tunnel construction.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A safety monitoring device for subway tunnel construction includes a rectangular ring-shaped frame, two rectangular ring-shaped elastic sealing rings fixedly connected to the lower side of the frame, a cavity formed between the frame and the two elastic sealing rings, a pipe joint provided on one side of the frame, a bracket fixedly connected to the upper side of the frame, and an air pipe slidably connected in the central hole of the bracket.

[0006] Preferably, six positioning plates are fixedly connected to the outer ring surface of the skeleton.

[0007] Preferably, two horizontal guide rails are installed on both sides of the skeleton that are axially opposite to the tunnel, and a flatness testing device is slidably connected to each horizontal guide rail. An arc-shaped guide rail is installed on both sides of the skeleton that are radially opposite to the tunnel, and a flatness testing device is also slidably connected to each arc-shaped guide rail.

[0008] Preferably, the flatness testing device includes a slider that slides on a horizontal or arc-shaped guide rail. One side of the slider is fixedly connected to a mounting base via a crossbar. One side of the mounting base is provided with a vertical rod, and the lower end of the vertical rod is fixedly connected to a mounting plate. A displacement sensor is mounted on the mounting plate.

[0009] Preferably, the upright slides up and down in a groove on one side of the mounting base, a spring is installed between the upright and the mounting base, a contact rod is fixedly connected to the upper end of the upright, a contact cylinder is fixedly connected to the upper side of the positioning plate, and the contact rod and the contact cylinder are correspondingly set.

[0010] Preferably, a cylinder is mounted on the frame, the telescopic end of the cylinder is fixedly connected to the crossbeam, and a connecting rod is hinged between the crossbeam and the slider.

[0011] Preferably, a test chamber is mounted on the trachea.

[0012] The beneficial effects of the present invention: The safety monitoring equipment for subway tunnel construction provided by the present invention monitors the permeability of the tunnel through an active water injection test. It can monitor each area step by step. While monitoring the permeability, it can also monitor the displacement and deformation of the shield tunnel segments, thereby improving the safety of tunnel construction. Attached Figure Description

[0013] Figure 1 This is a basic structural diagram of a safety monitoring device for subway tunnel construction provided by the present invention;

[0014] Figure 2 yes Figure 1 Enlarged view of part A2;

[0015] Figure 3 This is a basic structural diagram of Example 1;

[0016] Figure 4 This is a diagram illustrating the use of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] Example 1

[0019] like Figure 3 As shown, a safety monitoring device for subway tunnel construction in this embodiment includes a rectangular ring-shaped frame 1 with a U-shaped cross-section. Two rectangular ring-shaped elastic sealing rings 2 are fixedly connected to the lower side of the frame 1. When the elastic sealing rings 2 come into contact with the shield tunnel segment 100, a cavity 21 is formed between the frame 1, the shield tunnel segment 100, and the single elastic sealing ring 2. A pipe joint 11 is provided on one side of the frame 1, and the pipe joint 11 is connected to the cavity 21. A bracket 32 ​​is fixedly connected to the upper side of the frame 1, and an air pipe 3 is slidably connected in the central hole of the bracket 32.

[0020] This embodiment provides a safety monitoring device for subway tunnel construction with the following two working modes:

[0021] First, a traveling vehicle is set up inside the tunnel, and a corresponding installation device is set up on the traveling vehicle. The safety monitoring device of this embodiment is installed on the installation device. The safety monitoring device of this embodiment is moved toward the shield segment through the installation device, so that the elastic sealing ring 2 comes into contact with the shield segment 100. At the same time, the air pipe 3 is inserted into the grouting hole 101 of the shield segment 100. At this time, the gap between the adjacent shield segments 100 is exactly in the cavity 21.

[0022] The first working mode: Water is injected into the cavity 21 through the pipe joint 11, and then the water will slowly enter the gap of the adjacent shield tunnel segment 100. Then, air is pumped out through the air pipe 3. If water can be pumped out, it proves that there is water seepage in the shield tunnel segment area.

[0023] The second working mode: Water is injected into the grouting hole 101 of the shield tunnel segment 100 through the air pipe 3. Then the water will slowly enter the grouting hole 101. Then air is pumped out through the pipe joint 11. If water can be pumped out, it proves that there is water seepage in the shield tunnel segment area.

[0024] Example 2

[0025] See Figure 1 , Figure 2 and Figure 4 and combined Figure 3 Based on Embodiment 1, six positioning plates 7 are fixedly connected to the outer ring surface of the frame 1. The six positioning plates 7 are correspondingly set around the shield tunnel segment 100 and the transverse seams of other shield tunnel segments 100. In this way, when the elastic sealing ring 2 contacts the shield tunnel segment 100, the six positioning plates 7 are inserted into the seams one by one. This not only blocks the seams by the positioning plates 7, preventing water from flowing outward, but also positions the frame 1. The frame can then be used as a reference to test whether the shield tunnel segment has undergone displacement or deformation. Two horizontal guide rails 5 are installed on both sides of the frame 1 opposite to the tunnel axis. A flatness testing device 6 is slidably connected to each horizontal guide rail 5. An arc-shaped guide rail 4 is installed on both sides of the frame 1 opposite to the tunnel radially. The curvature of the arc-shaped guide rail 4 corresponds to the curvature of the shield tunnel segment. A flatness testing device 6 is also slidably connected to each arc-shaped guide rail 4.

[0026] The flatness testing device 6 includes a slider 61, which slides on a horizontal guide rail 5 or an arc-shaped guide rail 4. One side of the slider 61 is fixedly connected to a mounting base 63 via a crossbar 62. A vertical rod 64 is provided on one side of the mounting base 63, and a mounting plate 65 is fixedly connected to the lower end of the vertical rod 64. A displacement sensor 66 is mounted on the mounting plate 65. A cylinder 8 is mounted on the frame 1, and the telescopic end of the cylinder 8 is fixedly connected to a crossbeam 81. A connecting rod 82 is hinged between the crossbeam 81 and the slider 61. Thus, during the water permeability test, the cylinder 8 pushes the slider 61 to slide along the horizontal guide rail 5 or the arc-shaped guide rail 4, thereby enabling the monitoring of axial and radial deformation of the tunnel lining segments. The prerequisite for this monitoring is that a positioning plate 7 needs to be inserted into the gap to position the frame 1.

[0027] When monitoring the deformation of tunnel segments, the displacement sensor probe can easily get stuck in the gaps between the segments, causing deformation. Therefore, in this embodiment, the upright 64 slides up and down within a groove on one side of the mounting base 63. A spring 67 is installed between the upright 64 and the mounting base 63, with fixed plates fixed to both ends of the spring 67. One fixed plate is fixed to the upright 64, and the other is fixed to the mounting base 63. A contact rod 68 is fixedly connected to the upper end of the upright 64, and a contact cylinder 71 is fixedly connected to the upper side of the positioning plate 7. The contact rod 68 and the contact cylinder 71 are correspondingly arranged. Thus, during the movement of the displacement sensor, when it is about to pass through a gap, the contact rod 68 contacts the contact cylinder 71, causing the upright 64 to rise. This causes the displacement sensor to rise as well, passing through the gap, and then returning to its original position under the spring force. To prevent the displacement sensor from being damaged by excessive spring force, a damper is installed between the two fixed plates. At the same time, a limit block is installed on the upright 64. The limit block is located on the upper side of the mounting base 63. When the limit block contacts the mounting base 63, the displacement sensor is in contact with the tunnel segment.

Claims

1. A safety monitoring device for subway tunnel construction, characterized in that: The system includes a rectangular ring-shaped frame (1), with two rectangular ring-shaped elastic sealing rings (2) fixedly connected to the lower side of the frame (1). A pipe joint (11) is provided on one side of the frame (1), and a bracket (32) is fixedly connected to the upper side of the frame (1). An air pipe (3) is slidably connected in the central hole of the bracket (32). When the elastic sealing ring (2) contacts the shield segment (100), a cavity (21) is formed between the frame (1), the shield segment (100), and the two elastic sealing rings (2). The pipe joint (11) is connected to the cavity (21), and the air pipe (3) is inserted into the grouting hole (101) of the shield segment (100). The gap between adjacent shield segments (100) is located in the cavity (21).

2. The safety monitoring equipment for subway tunnel construction according to claim 1, characterized in that: The outer ring surface of the skeleton (1) is fixedly connected to six positioning plates (7).

3. The safety monitoring equipment for subway tunnel construction according to claim 2, characterized in that: The frame (1) is equipped with two horizontal guide rails (5) on both sides opposite to the tunnel axis. A flatness testing device (6) is slidably connected to each horizontal guide rail (5). The frame (1) is equipped with an arc-shaped guide rail (4) on both sides opposite to the tunnel radially. A flatness testing device (6) is also slidably connected to each arc-shaped guide rail (4).

4. The safety monitoring equipment for subway tunnel construction according to claim 3, characterized in that: The flatness testing device (6) includes a slider (61), which slides on the horizontal guide rail (5) or the arc guide rail (4). One side of the slider (61) is fixedly connected to the mounting base (63) via a crossbar (62). One side of the mounting base (63) is provided with a vertical rod (64), and the lower end of the vertical rod (64) is fixedly connected to the mounting plate (65). The mounting plate (65) is equipped with a displacement sensor (66).

5. A safety monitoring device for subway tunnel construction according to claim 4, characterized in that: The upright (64) slides up and down in the groove on one side of the mounting base (63). A spring (67) is installed between the upright (64) and the mounting base (63). The upper end of the upright (64) is fixedly connected to the contact rod (68). The upper side of the positioning plate (7) is fixedly connected to the contact cylinder (71). The contact rod (68) and the contact cylinder (71) are correspondingly arranged.

6. A safety monitoring device for subway tunnel construction according to claim 4, characterized in that: The frame (1) is equipped with a cylinder (8), and the telescopic end of the cylinder (8) is fixedly connected to a crossbeam (81). The crossbeam (81) and the slider (61) are hinged to a connecting rod (82).

7. A safety monitoring device for subway tunnel construction according to claim 1, characterized in that: The trachea (3) is equipped with a test box (31).

Images