Safety monitoring equipment for subway tunnel construction

Abstract

The invention relates to the technical field of tunnel safety disease monitoring, and particularly discloses a safety monitoring device for subway tunnel construction, which comprises a rectangular annular framework, the lower side of the framework is fixedly connected with two rectangular annular elastic sealing rings, a cavity is formed between the framework and the two elastic sealing rings, one side of the framework is provided with a pipe joint, and the other side of the framework is provided with a pipe joint. The upper side of the framework is fixedly connected with a support, and a central hole of the support is slidably connected with an air pipe. The safety monitoring equipment for subway tunnel construction has the beneficial effects that the water permeability of a tunnel is monitored in an active water injection test mode, each area can be monitored step by step, the displacement deformation condition of a shield segment can be monitored while the water permeability is monitored, and the safety of the tunnel construction is improved. Therefore, the safety of tunnel construction is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel safety disease monitoring, and particularly relates to a safety monitoring device for subway tunnel construction. BACKGROUND

[0002] Tunnel is an engineering building buried in stratum, which is a form of human utilization of underground space. Tunnel can be divided into traffic tunnel, hydraulic tunnel, municipal tunnel, mine tunnel and military tunnel. The structure of tunnel includes main building and auxiliary equipment. The main building is composed of tunnel body and tunnel portal, and the auxiliary equipment includes car avoidance hole, fire fighting facility, emergency communication and drainage and waterproof facility. Long tunnel has special ventilation and lighting equipment. For tunnel constructed by shield construction method, various types of safety diseases exist, and the most important disease is tunnel water seepage, that is, whether shield segment gap seeps water. When monitoring whether shield segment gap seeps water, water sensor is installed at the gap of shield segment, and the water sensor alarms when water seeps. This way is passive monitoring, and the position of the gap seeping water is uncertain, and the density of the sensor to be arranged is large. SUMMARY

[0003] The present application relates to the technical field of tunnel safety disease monitoring, and particularly relates to a safety monitoring device for subway tunnel construction.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] The safety monitoring device for subway tunnel construction comprises a rectangular ring-shaped framework, two rectangular ring-shaped elastic sealing rings are fixedly connected to the lower side of the framework, a cavity is formed between the framework and the two elastic sealing rings, a pipe joint is arranged on one side of the framework, a support is fixedly connected to the upper side of the framework, and a gas pipe is slidably connected in the central hole of the support.

[0006] Preferably, the outer ring surface of the framework is fixedly connected with six positioning plates.

[0007] Preferably, two horizontal guide rails are arranged on the two sides of the framework which are axially opposite to each other, one flatness testing device is slidably connected to each horizontal guide rail, one arc-shaped guide rail is arranged on the two sides of the framework which are radially opposite to each other, and one flatness testing device is also slidably connected to each arc-shaped guide rail.

[0008] Preferably, the flatness testing device comprises a sliding block which slides on the horizontal guide rail or the arc-shaped guide rail, a mounting seat is fixedly connected to one side of the sliding block through a cross rod, a vertical rod is arranged on one side of the mounting seat, an installation plate is fixedly connected to the lower end of the vertical rod, and a displacement sensor is arranged on the installation plate.

[0009] Preferably, the vertical pole slides up and down in the slide groove on one side of the mounting seat, a spring is installed between the vertical pole and the mounting seat, the upper end of the vertical pole is fixedly connected to the touch rod, the upper side of the positioning plate is fixedly connected to the touch cylinder, and the touch rod and the touch cylinder are correspondingly arranged.

[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 hingedly connected between the crossbeam and the slider.

[0011] Preferably, a test box is mounted on the air pipe.

[0012] Beneficial effects of the present invention: The safety monitoring equipment for subway tunnel construction provided by the present invention monitors the water permeability of the tunnel through an active water injection test, and can gradually monitor each area. While monitoring the water permeability, it can also monitor the displacement and deformation of the shield segments, thereby improving the safety of tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[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 A magnified view of part A 2;

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

[0016] Figure 4 It is a diagram of the use of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present 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 only used to explain the present invention and are not intended to limit the present 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 skeleton 1, the cross-section of the skeleton 1 is "U"-shaped, and two rectangular ring-shaped elastic sealing rings 2 are fixedly connected to the lower side of the skeleton 1. When the elastic sealing ring 2 contacts the shield segment 100, a cavity 21 is formed between the skeleton 1, the shield segment 100, and the single elastic sealing ring 2. A pipe joint 11 is provided on one side of the skeleton 1, and the pipe joint 11 is connected to the cavity 21. A bracket 32 ​​is fixedly connected to the upper side of the skeleton 1, and an air pipe 3 is slidably connected in the center hole of the bracket 32.

[0020] The safety monitoring equipment for subway tunnel construction provided by the embodiment has the following two working modes:

[0021] Firstly, a walking vehicle is arranged in the tunnel, corresponding mounting devices are arranged on the walking vehicle, the safety monitoring equipment of the embodiment is mounted on the mounting devices, the safety monitoring equipment of the embodiment is moved towards the shield segment through the mounting devices, so that the elastic sealing ring 2 is in contact with the shield segment 100, and 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 of the adjacent shield segment 100 is just in the cavity 21.

[0022] The first working mode: water is injected into the cavity 21 through the pipe joint 11, then the water slowly enters the gap of the adjacent shield segment 100, and then air is extracted outward through the air pipe 3, if water can be extracted, it proves that there is water seepage in the region of the shield segment.

[0023] The second working mode: water is injected into the grouting hole 101 of the shield segment 100 through the air pipe 3, then the water slowly enters the grouting hole 101, and then air is extracted outward through the pipe joint 11, if water can be extracted, it proves that there is water seepage in the region of the shield segment.

[0024] Embodiment 2

[0025] Referring to Figure 1 , Figure 2 and Figure 4 , and combining Figure 3 , on the basis of embodiment 1, the outer ring surface of the framework 1 is fixedly connected with six positioning plates 7, the six positioning plates 7 are arranged corresponding to the transverse seams of the shield segment 100 around other shield segments 100, so that when the elastic sealing ring 2 is in contact with the shield segment 100, the six positioning plates 7 are inserted into the gap one by one, in this way, on the one hand, the gap can be blocked by the positioning plates 7 to prevent water in the gap from flowing outward, and on the other hand, the positioning plates 7 can position the position of the framework 1, so that the framework can be used as a reference to test whether the shield segment is displaced and deformed. The framework 1 is provided with two horizontal guide rails 5 on the two sides opposite to the tunnel axis, each horizontal guide rail 5 is slidingly connected with a flatness testing device 6, the framework 1 is provided with an arc-shaped guide rail 4 on the two sides opposite to the tunnel diameter, the arc of the arc-shaped guide rail 4 is arranged corresponding to the arc of the shield segment, and each arc-shaped guide rail 4 is also slidingly connected with a flatness testing device 6.

[0026] The flatness testing device 6 comprises a sliding block 61 which slides on the horizontal guide rail 5 or the arc-shaped guide rail 4, one side of the sliding block 61 is fixedly connected with a mounting seat 63 through a cross bar 62, one side of the mounting seat 63 is provided with a vertical rod 64, the lower end of the vertical rod 64 is fixedly connected with a mounting plate 65, and the mounting plate 65 is provided with a displacement sensor 66. The skeleton 1 is provided with a cylinder 8, the telescopic end of the cylinder 8 is fixedly connected with a cross beam 81, and the cross beam 81 is hingedly connected with a connecting rod 82 between the sliding block 61. In this way, when the water permeability test is carried out, the sliding block 61 is pushed to slide along the horizontal guide rail 5 or the arc-shaped guide rail 4 by the cylinder 8, so that the axial and radial deformation of the shield segment can be monitored, and the prerequisite for monitoring is that the positioning plate 7 is inserted into the gap to position the skeleton 1.

[0027] When the displacement sensor passes through the gap between the shield segments during the deformation monitoring of the shield segments, the probe of the displacement sensor is easy to be inserted into the gap, so that the probe is deformed. Therefore, in the embodiment, the vertical rod 64 slides up and down in the sliding groove on one side of the mounting seat 63, a spring 67 is arranged between the vertical rod 64 and the mounting seat 63, both ends of the spring 67 are fixedly connected with fixed plates, one of the fixed plates is fixed with the vertical rod 64, and the other fixed plate is fixed with the mounting seat 63. The upper end of the vertical rod 64 is fixedly connected with a touch cylinder 68, the upper side of the positioning plate 7 is fixedly connected with a touch cylinder 71, and the touch cylinder 68 and the touch cylinder 71 are correspondingly arranged. In this way, when the displacement sensor is about to pass through the gap during the movement of the displacement sensor, the touch cylinder 68 contacts the touch cylinder 71, so that the vertical rod 64 rises, and the displacement sensor also rises to pass through the gap, and then is reset under the elastic force of the spring. In order to prevent the spring from being too elastic and damaging the displacement sensor, a damper is arranged between the two fixed plates, and a limiting block is arranged on the vertical rod 64, and the limiting block is located on the upper side of the mounting seat 63. When the limiting block contacts the mounting seat 63, the displacement sensor contacts the shield segment.

Claims

1. A safety monitoring device for subway tunnel construction, characterized by: The invention comprises a rectangular ring-shaped frame (1), wherein two rectangular ring-shaped elastic sealing rings (2) are fixedly connected to the lower side of the frame (1), a cavity (21) is formed between the frame (1) and the two elastic sealing rings (2), 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), and a central hole of the bracket (32) is slidably connected to the air pipe (3).

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 device for subway tunnel construction according to claim 2, characterized in that: Two horizontal guide rails (5) are installed on both sides of the skeleton (1) that are axially opposite to the tunnel, and a flatness testing device (6) is slidably connected to each of the horizontal guide rails (5). Two arc-shaped guide rails (4) are installed on both sides of the skeleton (1) that are radially opposite to the tunnel, and a flatness testing device (6) is also slidably connected to each of the arc-shaped guide rails (4).

4. The safety monitoring equipment for subway tunnel construction according to claim 3, characterized in that: The flatness testing device (6) comprises 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 a mounting seat (63) via a crossbar (62). A vertical rod (64) is provided on one side of the mounting seat (63). The lower end of the vertical rod (64) is fixedly connected to a mounting plate (65). A displacement sensor (66) is mounted on the mounting plate (65).

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

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

7. The safety monitoring equipment for subway tunnel construction according to claim 1, characterized in that: A test box (31) is installed on the air pipe (3).

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