Advanced monitoring device for subway shield tunnel

Abstract

The utility model discloses a subway shield tunnel advanced monitoring device, which comprises a first bracket, a signal acquisition device, a signal processing device and a signal transmitting device, and is characterized in that the first bracket is mounted on a segment bolt; the signal acquisition device is arranged in the duct piece, a first optical cable is arranged on the signal acquisition device, a first optical fiber interface is arranged on the first optical cable, and the first optical fiber interface can be exposed out of the duct piece; the signal processing device is detachably connected with the first support, a second optical cable is arranged on the signal processing device, and a second optical fiber interface capable of being connected with the first optical fiber interface is arranged on the second optical cable; the signal transmitting device is in signal connection with the signal processing device; the signal acquisition device can acquire strain signals of the duct piece, the signal processing device can receive and process the strain signals, and the signal transmitting device can receive the processed strain signals and transmit the processed strain signals to remote equipment. On the premise of ensuring the structural integrity of the duct piece and the safety and losslessness of monitoring equipment, rapid and convenient installation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of urban rail transit engineering monitoring devices, in particular to an advance monitoring device for a subway shield tunnel. Background Art

[0002] With the continuous emergence of large-diameter and ultra-large-diameter tunnels, the stability of shield segments after assembly has become increasingly prominent. Affected by external water and soil pressure and construction grouting, the segments may bear excessive loads, resulting in increased internal forces and deformation, thus posing a serious threat to construction safety.

[0003] In order to ensure the quality and safety of the pipe segments, it is particularly important to monitor them. At present, the deformation of the pipe segments is mainly monitored by monitoring devices. Considering that the overall line of engineering projects such as tunnels is long, it is usually necessary to construct in sections and install monitoring equipment in each construction area. After the construction is completed, the monitoring device needs to be removed from the current area and installed in the next construction area for monitoring. For areas where construction has been completed, irregular spot checks are required to ensure the quality and safety of the project.

[0004] Existing monitoring devices are usually fixed directly on the pipe segments. If the monitoring devices are fixed to the surface of the pipe segments by gluing, the monitoring equipment may be worn or even damaged during repeated disassembly and assembly. Bolting on the pipe segments will destroy the structure of the pipe segments themselves, affecting their strength and appearance. Repair work is required after dismantling, which undoubtedly increases the cost of the project and reduces construction efficiency. Summary of the invention

[0005] The utility model provides a subway shield tunnel advance monitoring device, which can be installed quickly and conveniently under the premise of ensuring the integrity of the pipe segment structure and the safety of the monitoring equipment.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] A subway shield tunnel advance monitoring device, comprising: a first bracket, a signal acquisition device, a signal processing device and a signal transmitting device, wherein the first bracket is installed on a segment bolt;

[0008] The signal acquisition device is arranged in the pipe segment, the signal acquisition device is provided with a first optical cable, the first optical cable is provided with a first optical fiber interface, and the first optical fiber interface can be exposed from the pipe segment;

[0009] The signal processing device is detachably connected to the first bracket, the signal processing device is provided with a second optical cable, and the second optical cable is provided with a second optical fiber interface that can be connected to the first optical fiber interface;

[0010] The signal transmitting device is signal-connected to the signal processing device;

[0011] The signal acquisition device can acquire the strain signal of the pipe segment, the signal processing device can receive and process the strain signal, and the signal transmitting device can receive the processed strain signal and transmit it to a remote device.

[0012] Furthermore, it also includes a second bracket, wherein the second bracket is fixed on the signal processing device;

[0013] The first bracket is provided with a first bolt hole and a through hole, the first bracket is sleeved on the segment bolt through the through hole, and is fixed by a nut screwed on the segment bolt;

[0014] The second bracket is provided with a second bolt hole, and the second bracket is fixed to the first bracket by a threaded fastener penetrating the second bolt hole and the first bolt hole.

[0015] Furthermore, the signal acquisition device is a grating optical fiber sensor, the signal processing device includes a grating demodulator, and the signal transmitting device includes GPRS.

[0016] Furthermore, the signal processing device further comprises a signal processing box and a wireless module transmitting end, the grating demodulator and the wireless module transmitting end are arranged in the signal processing box, and the wireless module transmitting end is electrically connected to the grating demodulator;

[0017] The signal transmitting device also includes a signal transmitting box and a wireless module receiving end. The GPRS and the wireless module receiving end are arranged in the signal transmitting box, and the GPRS and the wireless module receiving end are electrically connected.

[0018] Furthermore, one end of the first optical cable away from the first optical fiber interface is connected to a grating optical fiber sensor, and one end of the second optical fiber interface away from the first optical fiber interface is connected to a grating demodulator.

[0019] Furthermore, the grating optical fiber sensor is welded on the steel mesh of the pipe segment, the outer periphery of the grating optical fiber sensor is wrapped with a hot melt adhesive sleeve, and the first optical cable is tied to the steel mesh.

[0020] Furthermore, the signal processing device also includes a power supply module, which can provide power to the grating optical fiber sensor, the grating demodulator and the wireless module transmitting end.

[0021] Beneficial effects:

[0022] The utility model provides a subway shield tunnel advance monitoring device. By installing a first bracket on the segment bolts connecting the segments, it is ensured that the signal processing device can obtain a stable installation foundation without damaging the segments. The signal processing device and the first bracket are detachably connected, which effectively avoids the wear problem of the monitoring equipment caused by the traditional gluing method.

[0023] By setting up the first optical fiber interface and the second optical fiber interface, the signal acquisition device and the signal processing device can be quickly connected, thereby improving the installation efficiency of the monitoring device. At the same time, by adopting a contactless signal connection, the signal processing device and the signal transmitting device can be quickly connected, thereby further improving the installation efficiency of the monitoring device, reducing the loss that may be generated during the disassembly and assembly process, extending the service life of the monitoring device, ensuring the stability and reliability of the entire monitoring device, and reducing the cost of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of a subway shield tunnel advance monitoring device disclosed in the utility model installed on a pipe segment Figure 1 ;

[0026] Figure 2 A schematic diagram of a subway shield tunnel advance monitoring device disclosed in the utility model installed on a pipe segment Figure 2 ;

[0027] Figure 3 for Figure 2 Enlarged view of point C;

[0028] Figure 4 It is a structural schematic diagram of a subway shield tunnel advance monitoring device disclosed in the utility model;

[0029] Figure 5 It is a schematic diagram of a grating optical fiber sensor of a subway shield tunnel advance monitoring device disclosed in the utility model installed on a steel mesh;

[0030] Figure 6 It is a structural schematic diagram of a first bracket of a subway shield tunnel advance monitoring device disclosed in the utility model;

[0031] Figure 7It is a structural schematic diagram of a second bracket of a subway shield tunnel advance monitoring device disclosed in the utility model;

[0032] Figure 8 It is a schematic diagram of the coordination of a first bracket and a second bracket of a subway shield tunnel advance monitoring device disclosed in the utility model;

[0033] Fig. 9 The utility model discloses a structural schematic diagram of a fixing screw and a fixing nut of a subway shield tunnel advance monitoring device.

[0034] In the figure:

[0035] 1. Grating fiber sensor;

[0036] 2. Grating demodulator;

[0037] 3. GPRS;

[0038] 4. Signal processing box;

[0039] 5. Wireless module transmitter;

[0040] 6. Wireless module receiving end;

[0041] 7. Signal transmitting box;

[0042] 8. first bracket; 801. first bolt hole; 802. through hole;

[0043] 9. Second bracket; 901. Second bolt hole;

[0044] 10. first optical cable; 1001. first optical fiber interface;

[0045] 11. Second optical cable; 1101. Second optical fiber interface;

[0046] 12. Power module;

[0047] 13. Fixing screw;

[0048] 14. Cable ties;

[0049] 15. Fixing nut;

[0050] A. Segment; A1. Reserved bolt hole; A2. Steel mesh; B. Segment bolt. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] This embodiment provides a subway shield tunnel advance monitoring device, including: a first bracket 8, a signal acquisition device, a signal processing device and a signal transmitting device, such as Figure 3 As shown, the first bracket 8 is installed on the segment bolt B;

[0053] The signal acquisition device is arranged in the pipe segment A, and a first optical cable 10 is arranged on the signal acquisition device. Figure 3 As shown, the first optical cable 10 is provided with a first optical fiber interface 1001, and the first optical fiber interface 1001 can be exposed from the pipe segment A. In this embodiment, the signal acquisition device and the first optical cable 10 are pre-buried in the pipe segment A;

[0054] The signal processing device is detachably connected to the first bracket 8, and a second optical cable 11 is provided on the signal processing device. Figure 3 As shown, the second optical cable 11 is provided with a second optical fiber interface 1101 which can be connected to the first optical fiber interface 1001;

[0055] The signal transmitting device is arranged outside the subway shield tunnel, and the signal transmitting device is connected to the signal processing device by signal;

[0056] The signal acquisition device can acquire the strain signal of the pipe segment A, the signal processing device can receive and process the strain signal (convert the strain signal into an electrical signal), and the signal transmitting device can receive the processed strain signal and transmit it to a remote device, which is a cloud or a remote computer;

[0057] like Figure 2 As shown, the segment A is usually assembled with segment bolts B, and the ends of the segment bolts B are Figure 1 The reserved bolt hole A1 is exposed. This embodiment provides a subway shield tunnel advance monitoring device. By installing the first bracket 8 on the segment bolt B, the signal processing device is ensured to obtain a stable installation foundation without damaging the segment A. The signal processing device and the first bracket 8 are detachably connected, which effectively avoids the wear problem of the monitoring equipment caused by the traditional gluing method.

[0058] By setting the first optical fiber interface 1001 and the second optical fiber interface 1101, the signal acquisition device and the signal processing device can be quickly connected, thereby improving the installation efficiency of the monitoring device. At the same time, by adopting a non-contact signal connection, the signal processing device and the signal transmitting device can be quickly connected, further improving the installation efficiency of the monitoring device, reducing the loss that may be generated during the disassembly and assembly process, extending the service life of the monitoring device, ensuring the stability and reliability of the monitoring device, and reducing the cost of the project.

[0059] In a specific embodiment, Figure 3 As shown, it also includes a second bracket 9, and the second bracket 9 is welded and fixed on the signal processing device;

[0060] like Figure 6 As shown, the first bracket 8 is provided with a first bolt hole 801 and a through hole 802, and the first bracket 8 is sleeved on the segment bolt B through the through hole 802, and is fixed on the segment bolt B by screwing a nut on the segment bolt B;

[0061] like Figure 7 As shown, the second bracket 9 is provided with a second bolt hole 901, and the second bracket 9 is fixed to the first bracket 8 by a threaded fastener penetrating the second bolt hole 901 and the first bolt hole 801. The cooperation between the second bracket 9 and the first bracket 8 is shown in FIG. Figure 8 As shown, in this embodiment, by passing through the second bolt hole 901 and the first bolt hole 801, the fixing screw 13 is Fig. 9 As shown, the second bracket 9 and the first bracket 8 are fixed together by the fixing nut 15 .

[0062] In a specific embodiment, Figure 4 As shown, the signal acquisition device is a grating optical fiber sensor 1, the signal processing device includes a grating demodulator 2, and the signal transmitting device includes a GPRS 3.

[0063] In a specific embodiment, Figure 4 As shown, the signal processing device further includes a signal processing box 4 and a wireless module transmitting end 5, the grating demodulator 2 and the wireless module transmitting end 5 are arranged in the signal processing box 4, the wireless module transmitting end 5 is electrically connected to the grating demodulator 2, and the second bracket 9 is welded and fixed on the signal processing box 4;

[0064] like Figure 4 As shown, the signal transmitting device further includes a signal transmitting box 7 and a wireless module receiving terminal 6, the GPRS 3 and the wireless module receiving terminal 6 are arranged in the signal transmitting box 7, and the GPRS 3 and the wireless module receiving terminal 6 are electrically connected;

[0065] The grating optical fiber sensor 1 collects the stress signal of the segment A, the grating demodulator 2 converts the strain signal into an electrical signal, the wireless module transmitter 5 sends the electrical signal to the wireless module receiver 6, and the GPRS 3 transmits the electrical signal received by the wireless module receiver 6 to the cloud or a remote computer. The remote real-time reading of the intelligent monitoring data is realized through Internet access, and the advanced prediction and analysis of the stability parameters is realized through RFR, so that the monitoring personnel can monitor the deformation of the tunnel shield segment.

[0066] In a specific embodiment, Figure 4 As shown, one end of the first optical cable 10 away from the first optical fiber interface 1001 is connected to the grating optical fiber sensor 1 , and one end of the second optical fiber interface 1101 away from the first optical fiber interface 1001 is connected to the grating demodulator 2 .

[0067] In a specific embodiment, Figure 5 As shown, the grating optical fiber sensor 1 is welded on the steel mesh A2 of the pipe segment A, and the outer periphery of the grating optical fiber sensor 1 is wrapped with a hot melt adhesive sleeve to protect the grating optical fiber sensor 1. The first optical cable 10 is tied to the steel mesh A2, and the grating optical fiber sensor 1 can optionally use a steel strain gauge.

[0068] In a specific embodiment, Figure 4 As shown, the signal processing device further includes a power module 12 , and the power module 12 can provide power to the grating optical fiber sensor 1 , the grating demodulator 2 and the wireless module transmitting end 5 .

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A subway shield tunnel advance monitoring device, characterized in that: include: A first bracket (8), a signal acquisition device, a signal processing device and a signal transmitting device, wherein the first bracket (8) is mounted on the segment bolt (B); The signal acquisition device is arranged in the pipe segment (A), the signal acquisition device is provided with a first optical cable (10), the first optical cable (10) is provided with a first optical fiber interface (1001), and the first optical fiber interface (1001) can be exposed from the pipe segment (A); The signal processing device is detachably connected to the first bracket (8); a second optical cable (11) is provided on the signal processing device; and a second optical fiber interface (1101) capable of being connected to the first optical fiber interface (1001) is provided on the second optical fiber cable (11); The signal transmitting device is signal-connected to the signal processing device; The signal acquisition device can acquire the strain signal of the pipe segment (A), the signal processing device can receive and process the strain signal, and the signal transmitting device can receive the processed strain signal and transmit it to a remote device.

2. The subway shield tunnel advance monitoring device according to claim 1 is characterized in that: It also includes a second bracket (9), wherein the second bracket (9) is fixed on the signal processing device; The first bracket (8) is provided with a first bolt hole (801) and a through hole (802); the first bracket (8) is sleeved on the segment bolt (B) through the through hole (802) and is fixed by screwing a nut on the segment bolt (B); The second bracket (9) is provided with a second bolt hole (901), and the second bracket (9) and the first bracket (8) are fixed together by a threaded fastener penetrating the second bolt hole (901) and the first bolt hole (801).

3. The subway shield tunnel advance monitoring device according to claim 1 is characterized in that: The signal acquisition device is a grating optical fiber sensor (1), the signal processing device comprises a grating demodulator (2), and the signal transmission device comprises a GPRS (3).

4. The subway shield tunnel advance monitoring device according to claim 3 is characterized in that: The signal processing device further comprises a signal processing box (4) and a wireless module transmitting end (5), wherein the grating demodulator (2) and the wireless module transmitting end (5) are arranged in the signal processing box (4), and the wireless module transmitting end (5) is electrically connected to the grating demodulator (2); The signal transmitting device further comprises a signal transmitting box (7) and a wireless module receiving end (6), wherein the GPRS (3) and the wireless module receiving end (6) are arranged in the signal transmitting box (7), and the GPRS (3) and the wireless module receiving end (6) are electrically connected.

5. The subway shield tunnel advance monitoring device according to claim 3 is characterized in that: One end of the first optical cable (10) away from the first optical fiber interface (1001) is connected to the grating optical fiber sensor (1), and one end of the second optical fiber interface (1101) away from the first optical fiber interface (1001) is connected to the grating demodulator (2).

6. The subway shield tunnel advance monitoring device according to claim 3 is characterized in that: The grating optical fiber sensor (1) is welded to the steel mesh (A2) of the pipe segment (A), the outer periphery of the grating optical fiber sensor (1) is wrapped with a hot melt adhesive sleeve, and the first optical cable (10) is tied to the steel mesh (A2).

7. The subway shield tunnel advance monitoring device according to claim 3 is characterized in that: The signal processing device further comprises a power module (12), wherein the power module (12) is capable of providing electric energy to the grating optical fiber sensor (1), the grating demodulator (2) and the wireless module transmitting end (5).

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