Shield tunnel driving state monitoring device

Abstract

The utility model discloses a shield tunnel driving state monitoring device which comprises a shield segment, an inner groove arranged on the inner side of the shield segment and a framework rod fixed in the inner groove, a strain sensing optical cable is installed in the inner groove, an installation structure is arranged between the strain sensing optical cable and the framework rod, and the strain sensing optical cable is connected with the framework rod. The mounting structure comprises a sleeve A, a sleeve B, a fixed seat A, a fixed seat B, a rotary connecting seat and a rotary connecting groove; the sleeve A is clamped on the surface of the framework rod; when the strain sensing optical cable is installed, the sleeve A can be clamped on the surface of the framework rod, then the sleeve B can be rotationally adjusted to be matched with the strain sensing optical cable to be installed in angle, and then the strain sensing optical cable is clamped into the sleeve B, so that stable installation of the strain sensing optical cable is completed. And the strain sensing optical cable is integrally smooth and tidy and is not easy to damage, so that stable transmission of information is ensured, and normal monitoring of the interior of the tunnel is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield tunnel construction, and in particular relates to a shield tunnel excavation state monitoring device. Background Art

[0002] A shield tunnel is a mechanized construction method that uses the shield method to push a shield machine into the ground, using the shield shell and segments to support the surrounding rock to prevent collapse into the tunnel. At the same time, a cutting device is used to excavate the soil in front of the excavation face, and the soil is transported out of the hole by excavation machinery. The tunnel is then pressurized and pushed forward at the rear by jacks, and precast concrete segments are assembled to form the tunnel structure. To ensure safe excavation during construction, various safety monitoring measures are required inside the tunnel. For example, the intelligent shield segment component and shield tunnel monitoring system described in Chinese patent application number CN201810270358.4 monitors strain changes by installing strain sensing optical cables inside the shield segments.

[0003] However, in the above-mentioned patent, the strain sensing optical cable is installed by directly winding the optical cable around the skeleton. The stability of the optical cable under this installation method cannot be guaranteed. Not only is it easy to fall off, but repeated bending and curling of the optical cable can also easily damage the optical cable, affecting signal transmission. Therefore, it is necessary to design a new monitoring device to solve this problem. Utility Model Content

[0004] The purpose of the utility model is to provide a shield tunnel excavation status monitoring device to solve the problem that the strain sensing optical cable proposed in the above background technology is not strong enough and is easily damaged.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a shield tunnel excavation status monitoring device, comprising a shield segment, an inner groove opened on the inner side of the shield segment, and a skeleton rod fixed inside the inner groove; a strain sensing optical cable is installed inside the inner groove; an installation structure is provided between the strain sensing optical cable and the skeleton rod; the installation structure comprises a sleeve A, a sleeve B, a fixing seat A, a fixing seat B, a rotating connecting seat and a rotating connecting groove; the sleeve A is clamped on the surface of the skeleton rod, the strain sensing optical cable is passed through and clamped inside the sleeve B, the fixing seat A is fixed on the front surface of the sleeve A, the fixing seat B is fixed on the rear surface of the sleeve B, the rotating connecting seat is fixed on one side of the fixing seat B, and is movably connected to the rotating connecting groove opened inside the fixing seat A.

[0006] Preferably, the sleeve A and the sleeve B are arc-shaped structures adapted to the outer surfaces of the skeleton rod and the strain sensing optical cable, and the inner walls of the sleeve A and the sleeve B are provided with rubber anti-slip strips.

[0007] Preferably, the cross-section of the rotating connection seat in a top view is a T-shaped structure and is adapted to the inner wall of the rotating connection groove.

[0008] Preferably, the mounting structure further comprises a gear plate and a gear groove, wherein the gear plate is fixed to the inner wall of the rotating connection groove and is engaged with the gear groove provided at the inner end of the rotating connection seat.

[0009] Preferably, the mounting structure further comprises a spring, which is sleeved on the surface of the rotating connection seat, and whose two ends respectively abut against the inner end of the rotating connection seat and the inner wall of the rotating connection groove.

[0010] Preferably, the end of the strain sensing optical cable extends out of the shield segment, and a buffer protection component is arranged between the strain sensing optical cable and the shield segment. The buffer protection component includes a wire threading groove, a wire threading barrel, a fixing ring and an installation ring. The wire threading groove is opened inside the shield segment, the wire threading barrel is installed inside the wire threading groove, the fixing ring is fixed at one end of the wire threading barrel, and the installation ring is installed at the other end of the wire threading barrel. The wire threading barrel, the fixing ring and the installation ring form an H-shaped structure, and the strain sensing optical cable passes through the three.

[0011] Preferably, the buffer protection assembly further includes a connecting ring and a ring groove, wherein the connecting ring is fixed to the inner surface of the mounting ring and is threadedly connected to the ring groove provided at the end of the threading barrel.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When installing the strain sensing optical cable, sleeve A can be first clamped on the surface of the skeleton rod, and then sleeve B can be rotated and adjusted to adapt the angle of the strain sensing optical cable to be installed. After that, the strain sensing optical cable is clamped into the inside of sleeve B to complete the stable installation of the strain sensing optical cable. The strain sensing optical cable is smooth and neat as a whole and not easily damaged, ensuring stable transmission of information and normal monitoring of the interior of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0015] Figure 2 For this utility model Figure 1 Enlarged schematic diagram of area A in the middle;

[0016] Figure 3 This is a top sectional view of the installation structure of the utility model;

[0017] Figure 4 This is a front cross-sectional view of the buffer protection component of the utility model;

[0018] In the figure: 100, shield segment; 200, inner groove; 300, skeleton rod; 400, strain sensing optical cable; 500, mounting structure; 501, sleeve A; 502, sleeve B; 503, fixing seat A; 504, fixing seat B; 505, rotating connecting seat; 506, rotating connecting groove; 507, gear plate; 508, gear groove; 509, spring; 600, buffer protection assembly; 601, wire threading groove; 602, wire threading barrel; 603, fixing ring; 604, mounting ring; 605, connecting ring; 606, ring groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example

[0021] See also Figures 1 to 4, is an embodiment of the present utility model, which provides a technical solution: a shield tunnel excavation status monitoring device, including a shield segment 100, an inner groove 200 opened on the inner side of the shield segment 100, and a skeleton rod 300 fixed inside the inner groove 200, a strain sensing optical cable 400 is installed inside the inner groove 200, and the strain sensing optical cable 400 can transmit strain change information, thereby monitoring the inside of the shield tunnel, and an installation structure 500 is provided between the strain sensing optical cable 400 and the skeleton rod 300, and the installation structure 500 includes a sleeve A501, a sleeve B502, a fixing seat A503, a fixing seat B504, a rotating connection seat 505 and a rotating connection groove 506, the sleeve A501 is clamped on the surface of the skeleton rod 300, and the strain sensing optical cable 400 is penetrated and clamped inside the sleeve B502, completing the strain sensing optical cable 400 and the skeleton The connection and installation of the rod 300, the fixed seat A503 is fixed on the front surface of the sleeve A501, the fixed seat B504 is fixed on the rear surface of the sleeve B502, the rotating connecting seat 505 is fixed on one side of the fixed seat B504, and is movably connected to the rotating connecting groove 506 opened inside the fixed seat A503, the rotating connecting seat 505 can rotate inside the rotating connecting groove 506, so that the angle of the sleeve B502 can be adjusted, so as to adapt to the strain sensing optical cable 400 at different angles, thereby improving the smoothness of the strain sensing optical cable 400, the sleeve A501 and the sleeve B502 are arc-shaped structures adapted to the outer surfaces of the skeleton rod 300 and the strain sensing optical cable 400, and the inner walls of the sleeve A501 and the sleeve B502 are provided with rubber anti-slip strips to ensure the clamping stability between the sleeve A501 and the skeleton rod 300, and the sleeve B502 and the strain sensing optical cable 400.

[0022] In this embodiment, preferably, the cross-section of the rotating connecting seat 505 when viewed from above is a T-shaped structure, and is adapted to the inner wall of the rotating connecting groove 506 to prevent it from falling off. The mounting structure 500 also includes a gear plate 507 and a gear groove 508. The gear plate 507 is fixed to the inner wall of the rotating connecting groove 506 and is engaged with the gear groove 508 opened at the inner end of the rotating connecting seat 505. A certain number of engaging teeth are provided on the surfaces of the gear plate 507 and the gear groove 508. When the two are engaged, the rotating connecting seat 505 can be fixed. If rotation adjustment is required, the rotating connecting seat 505 can be pulled to separate the gear plate 507 and the gear groove 508 to release the engagement. At this time, it can be rotated to adjust the angle, and then the gear plate 507 and the gear groove 508 are engaged to complete the fixation.

[0023] In this embodiment, preferably, the mounting structure 500 also includes a spring 509, which is sleeved on the surface of the rotating connecting seat 505, and whose two ends are respectively abutted against the inner end of the rotating connecting seat 505 and the inner wall of the rotating connecting groove 506, and the elastic force of the spring 509 is used to ensure stable clamping between the gear plate 507 and the gear groove 508.

[0024] In this embodiment, preferably, the end of the strain sensing optical cable 400 extends out of the shield segment 100 and can be connected to an external component. A buffer protection component 600 is provided between the strain sensing optical cable 400 and the shield segment 100 to play a buffer protection role. The buffer protection component 600 includes a threading groove 601, a threading barrel 602, a fixing ring 603 and an installation ring 604. The threading groove 601 is opened inside the shield segment 100, the threading barrel 602 is installed inside the threading groove 601, the fixing ring 603 is fixed to one end of the threading barrel 602, and the installation ring 604 is installed on the threading barrel 60 2, the threading barrel 602, the fixing ring 603 and the installation ring 604 form an H-shaped structure. The strain sensing optical cable 400 passes through the three. All three are made of plastic with a soft texture. The strain sensing optical cable 400 is not easily scratched when it moves inside the three. The buffer protection component 600 also includes a connecting ring 605 and a ring groove 606. The connecting ring 605 is fixed to the inner surface of the installation ring 604 and is threadedly connected to the ring groove 606 provided at the end of the threading barrel 602, completing the installation connection between the threading barrel 602, the fixing ring 603 and the installation ring 604.

[0025] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shield tunnel excavation status monitoring device, comprising a shield segment (100), an inner groove (200) provided inside the shield segment (100), and a skeleton rod (300) fixed inside the inner groove (200), characterized in that: A strain sensing optical cable (400) is installed inside the inner groove (200), and an installation structure (500) is provided between the strain sensing optical cable (400) and the skeleton rod (300). The installation structure (500) includes a sleeve A (501), a sleeve B (502), a fixed seat A (503), a fixed seat B (504), a rotating connection seat (505) and a rotating connection groove (506). The sleeve A (501) is clamped on the surface of the skeleton rod (300), and the strain sensing optical cable (400) is clamped inside the sleeve B (502). The fixed seat A (503) is fixed on the front surface of the sleeve A (501), and the fixed seat B (504) is fixed on the rear surface of the sleeve B (502). The rotating connection seat (505) is fixed on one side of the fixed seat B (504) and is movably connected to the rotating connection groove (506) provided inside the fixed seat A (503).

2. The shield tunnel excavation status monitoring device according to claim 1, characterized in that: The sleeve A (501) and the sleeve B (502) are arc-shaped structures adapted to the outer surfaces of the skeleton rod (300) and the strain sensing optical cable (400), and the inner walls of the sleeve A (501) and the sleeve B (502) are provided with rubber anti-slip strips.

3. The shield tunnel excavation status monitoring device according to claim 1, characterized in that: The cross section of the rotating connection seat (505) when viewed from above is T-shaped and is adapted to the inner wall of the rotating connection groove (506).

4. The shield tunnel excavation status monitoring device according to claim 1, characterized in that: The mounting structure (500) further comprises a gear plate (507) and a gear groove (508), wherein the gear plate (507) is fixed to the inner wall of the rotating connection groove (506) and is engaged with the gear groove (508) provided at the inner end of the rotating connection seat (505).

5. The shield tunnel excavation status monitoring device according to claim 1, characterized in that: The mounting structure (500) further comprises a spring (509), which is sleeved on the surface of the rotating connection seat (505), and whose two ends respectively abut against the inner end of the rotating connection seat (505) and the inner wall of the rotating connection groove (506).

6. The shield tunnel excavation status monitoring device according to claim 1, characterized in that: The end of the strain sensing optical cable (400) extends out of the shield segment (100), and a buffer protection assembly (600) is provided between the strain sensing optical cable (400) and the shield segment (100). The buffer protection assembly (600) comprises a threading groove (601), a threading barrel (602), a fixing ring (603), and an installation ring (604). The threading groove (601) is opened inside the shield segment (100), the threading barrel (602) is installed inside the threading groove (601), the fixing ring (603) is fixed to one end of the threading barrel (602), and the installation ring (604) is installed at the other end of the threading barrel (602). The threading barrel (602), the fixing ring (603), and the installation ring (604) form an H-shaped structure, and the strain sensing optical cable (400) passes through the three.

7. The shield tunnel excavation status monitoring device according to claim 6, characterized in that: The buffer protection assembly (600) further comprises a connecting ring (605) and an annular groove (606); the connecting ring (605) is fixed to the inner surface of the mounting ring (604) and is threadedly connected to the annular groove (606) provided at the end of the threading barrel (602).

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