Large-span tunnel blasting construction earthquake measuring device

Abstract

The utility model discloses a large span tunnel blasting construction seismometry device, including tunnel support structure main part, seismometry platform, vibration sensor and background host, tunnel support structure main part internal bottom end is uniformly provided with seismometry platform, and the top of seismometry platform is equipped with mounting piece, and the seismometry platform is equipped with mounting block, and the backstage host is equipped with the vibration sensor. Vibration sensors are mounted on the mounting blocks correspondingly, a main antenna is arranged on one side of each vibration sensor through a support, and a background host is arranged on one side of the tunnel supporting structure body. According to the tunnel supporting structure, the tunnel supporting structure main body, the mounting pieces, the vibration measuring platforms, the mounting blocks, the clamping blocks, the threaded grooves, the external threads and the vibration sensors are installed, the positions of the vibration measuring platforms on the tunnel supporting structure main body and settlement and convergence points of a tunnel are located at the same normal position, and the three vibration measuring points can be monitored at the same time; therefore, the three groups of monitoring data have relevance, and the vibration measurement accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction seismic measurement, in particular to a large-span tunnel blasting construction seismic measurement device. Background Art

[0002] The construction of high-speed railways is accompanied by the construction of underground and tunnel projects. The underground or tunnel projects will also be accompanied by excavation stages and processes during the construction process. Blasting technology needs to be used in the excavation process, especially for tunnels with larger spans. The construction needs to be carried out in sections (double side wall, CRD and other methods). Cross-blasting construction will cause vibration, which will affect the tunnel support structure and damage the surrounding rock.

[0003] In order to better ensure the safety and reliability of large-span tunnel construction, thereby protecting the lives and property of construction workers from threats, and giving full play to the social and economic benefits of tunnel engineering, a suitable and reasonable seismic measurement method is very necessary. The vibration points of common seismic measuring devices are arranged on the tunnel construction ground, which will produce attenuation during testing and cause data distortion. Therefore, a large-span tunnel blasting construction seismic measuring device is needed. Utility Model Content

[0004] The utility model aims to provide a seismic measuring device for blasting construction of a large-span tunnel, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a seismic measuring device for blasting construction in a large-span tunnel, comprising a tunnel support structure body, a seismic measuring platform, a vibration sensor and a background host, seismic measuring platforms are evenly arranged at the bottom end inside the tunnel support structure body, and mounting parts are arranged on the tops of the seismic measuring platforms, and the mounting parts are connected to the tunnel support structure body by fixing bolts, mounting blocks are arranged on the seismic measuring platforms, and vibration sensors are installed on the mounting blocks, a main antenna is arranged on one side of the vibration sensor through a bracket, a background host is arranged on one side of the tunnel support structure body, and a circuit board is arranged inside the background host, and a central chip, a data analysis module and a storage module are respectively arranged on the circuit board.

[0006] Preferably, three groups of seismic measuring platforms are provided, and the positions of the seismic measuring platforms on the main body of the tunnel support structure are at the same normal position as the settlement and convergence points of the tunnel.

[0007] Preferably, a clamping block is provided at one end of the vibration sensor, and an external thread is provided on the outer side of the clamping block, and a thread groove matching the clamping block is provided on the mounting block.

[0008] Preferably, an aluminum plate is provided on one side of the main antenna, and the aluminum plate is plated with a silver film.

[0009] Preferably, sub-antennas are evenly distributed on the aluminum plates on both sides of the main antenna, and the sub-antennas are connected to the main antenna.

[0010] Preferably, one end of the fixing bolt is connected and fixed by a locking nut, and a side of the locking nut close to the mounting piece is tightly fitted with the mounting piece through a buffer gasket.

[0011] Preferably, a bulge is provided on one side of the buffer gasket close to the locking nut, and an elastic member is provided between the bulge and the locking nut. The elastic member is an arched structure and is made of a rubber strip.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The large-span tunnel blasting construction seismic measuring device is equipped with a tunnel support structure body, a mounting part, a seismic measuring platform, a mounting block, a clamping block, a thread groove, an external thread and a vibration sensor. The seismic measuring platform is provided with three groups, and its position on the tunnel support structure body is at the same normal position as the settlement and convergence point of the tunnel. The vibration sensor is connected with the thread groove provided on the mounting block through the clamping block. The outer side of the clamping block is provided with an external thread. The vibration sensor can be quickly installed with the mounting block by rotating. The three groups of vibration measuring points can be monitored at the same time, so that the three groups of monitoring data are correlated, the attenuation generated during vibration measurement is reduced, and the accuracy of vibration measurement is improved.

[0014] (2) The large-span tunnel blasting construction seismic measurement device is equipped with a background host, a circuit board, a central chip, a data analysis module, a main antenna, a sub-antenna and an aluminum plate. The vibration sensor collects seismic waves, vibration signals and other information generated during tunnel blasting construction, and then transmits the data to the background host through the main antenna. The vibration measurement data is analyzed and processed by the data analysis module to achieve wireless monitoring. The aluminum plates are coated with silver film, which is conducive to reflecting electromagnetic waves, so that the signals in front of the aluminum plates overlap, achieving the effect of enhancing the signal. The sub-antenna is connected to the main antenna to increase the signal transmission of the main antenna and improve the signal receiving efficiency of the background host.

[0015] (3) The large-span tunnel blasting construction seismic measuring device is installed with a mounting part, a fixing bolt, a locking nut, a buffer plate, a bulge and an elastic part. The mounting part is connected to the main body of the tunnel support structure through the fixing bolt, the locking nut is connected to one end of the fixing bolt, the buffer plate is tightly fitted to one side of the mounting part, and the elastic part is made of a rubber strip with an arch structure. When affected by external force, it can disperse and buffer the external force through its own deformation and recovery effect, thereby improving the stability of the seismic measuring platform installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view structural schematic diagram of the utility model;

[0017] Figure 2 It is a partial enlarged structural schematic diagram of the utility model;

[0018] Figure 3 It is a schematic diagram of the side cross-sectional structure of the mounting member of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the vibration sensor of the utility model;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the background host of the utility model.

[0021] In the figure: 1. Tunnel support structure body; 2. Mounting parts; 3. Seismic platform; 4. Vibration sensor; 5. Background host; 6. Locking nut; 7. Thread groove; 8. Mounting block; 9. Main antenna; 10. Fixing bolt; 11. Buffer gasket; 12. Elastic part; 13. Bulge; 14. Block; 15. External thread; 16. Auxiliary antenna; 17. Aluminum plate; 18. Circuit board; 19. Central chip; 20. Data analysis module; 21. Storage module. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in 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.

[0023] See also Figure 1-5 The utility model provides an embodiment: a seismic measuring device for blasting construction of a large-span tunnel, comprising a tunnel support structure body 1, a seismic measuring platform 3, a vibration sensor 4 and a background host 5, the seismic measuring platform 3 is evenly arranged at the bottom end of the tunnel support structure body 1, and the top of the seismic measuring platform 3 is provided with a mounting member 2, and the mounting member 2 is connected to the tunnel support structure body 1 by a fixing bolt 10;

[0024] The mounting member 2 is connected to the tunnel support structure body 1 through a fixing bolt 10, one end of the fixing bolt 10 is connected and fixed through a locking nut 6, and the side of the locking nut 6 close to the mounting member 2 is tightly fitted to the mounting member 2 through a buffer gasket 11;

[0025] The buffer gasket 11 is provided with a bulge 13 on one side close to the locking nut 6, and an elastic member 12 is provided between the bulge 13 and the locking nut 6. The elastic member 12 is an arched structure, and the elastic member 12 is made of a rubber strip. When affected by an external force, the elastic member 12 can disperse and buffer the external force through its own deformation and recovery effect, thereby improving the stability of the installation of the seismic platform 3;

[0026] The seismic measurement platforms 3 are all provided with mounting blocks 8, and the mounting blocks 8 are all provided with vibration sensors 4;

[0027] A clamping block 14 is provided at one end of the vibration sensor 4, and an external thread 15 is provided on the outer side of the clamping block 14. A thread groove 7 matching the clamping block 14 is provided on the mounting block 8, so that the vibration sensor 4 can be quickly installed on the mounting block 8 by rotating;

[0028] A main antenna 9 is provided on one side of the vibration sensor 4 through a bracket, and a background host 5 is provided on one side of the tunnel support structure body 1;

[0029] A circuit board 18 is disposed inside the background host 5, and a central chip 19, a data analysis module 20 and a storage module 21 are disposed on the circuit board 18;

[0030] The vibration sensor 4 collects information such as seismic waves and vibration signals generated during tunnel blasting construction, and then transmits the data to the background host 5 through the main antenna 9. The vibration data is analyzed and processed by the data analysis module 20 and stored by the storage module 21, so as to realize wireless monitoring of the vibration in the tunnel during the tunnel blasting construction process;

[0031] An aluminum plate 17 is provided on one side of the main antenna 9, and the aluminum plate 17 is coated with a silver film, which is conducive to reflecting electromagnetic waves, so that the signals in front of the aluminum plate 17 overlap, thereby achieving the effect of enhancing the signal;

[0032] Sub-antennas 16 are evenly distributed on the aluminum plates 17 on both sides of the main antenna 9, and the sub-antennas 16 are connected to the main antenna 9 to increase the signal transmission volume of the main antenna 9 and improve the signal receiving efficiency of the background host 5;

[0033] There are 3 groups of seismic platforms 3, and the positions of the seismic platforms 3 on the tunnel support structure body 1 are at the same normal position as the settlement and convergence points of the tunnel, so as to reduce the attenuation generated during vibration measurement, and the 3 groups of vibration measurement points can be monitored at the same time, so that the 3 groups of monitoring data are correlated, thereby improving the accuracy of vibration measurement;

[0034] The specific models and specifications of the vibration sensor 4, the central chip 19, the data analysis module 20 and the storage module 21 need to be determined by the selection calculation based on the specification parameters of the device. The selection calculation method is a prior art, so it will not be described in detail.

[0035] Working principle: When the embodiment of the present application is in use, a mounting part 2 is provided on the seismic platform 3, and the mounting part 2 is connected to the main body 1 of the tunnel support structure through a fixing bolt 10, and the locking nut 6 is connected to one end of the fixing bolt 10. The buffer gasket 11 is tightly fitted with one side of the mounting part 2, and the elastic part 12 is made of a rubber strip with an arched structure. When affected by external forces, it can disperse and buffer the external forces through its own deformation and recovery effect, thereby improving the installation stability of the seismic platform 3. The vibration sensor 4 is connected to the threaded groove 7 provided on the mounting block 8 through the clamping block 14. The vibration sensor 4 collects information such as seismic waves and vibration signals generated during tunnel blasting construction, and then transmits the data to the back through the main antenna 9. The host 5 analyzes and processes the vibration data through the data analysis module 20 to realize wireless monitoring. An aluminum plate 17 is set on one side of the main antenna 9, and a silver film is plated on the aluminum plate 17, which is beneficial to reflect electromagnetic waves, so that the signals in front of the aluminum plate 17 overlap, achieving the effect of enhancing the signal. The auxiliary antenna 16 is connected to the main antenna 9 to increase the signal transmission volume of the main antenna 9 and improve the signal receiving efficiency of the background host 5. There are 3 groups of seismic measurement platforms 3, and their positions on the tunnel support structure body 1 are at the same normal position as the settlement and convergence point of the tunnel, reducing the attenuation generated during vibration measurement, and can monitor 3 groups of vibration measurement points at the same time, so that the 3 groups of monitoring data are correlated, thereby improving the accuracy of vibration measurement.

Claims

1. A seismic measuring device for blasting construction of a large-span tunnel, characterized in that: The invention comprises a tunnel support structure body (1), a seismic platform (3), a vibration sensor (4) and a background host (5), wherein the seismic platform (3) is evenly arranged at the bottom of the tunnel support structure body (1), and the top of each seismic platform (3) is provided with a mounting member (2), and each mounting member (2) is connected to the tunnel support structure body (1) via a fixing bolt (10), each seismic platform (3) is provided with a mounting block (8), and each mounting block (8) is provided with a vibration sensor (4), and each vibration sensor (4) is provided with a main antenna (9) on one side thereof via a bracket, and a background host (5) is arranged on one side of the tunnel support structure body (1), and a circuit board (18) is arranged inside the background host (5), and a central chip (19), a data analysis module (20) and a storage module (21) are respectively arranged on the circuit board (18).

2. A seismic measuring device for blasting construction of a large-span tunnel according to claim 1, characterized in that: Three groups of seismic measurement platforms (3) are provided, and the positions of the seismic measurement platforms (3) on the tunnel support structure body (1) are at the same normal position as the settlement and convergence points of the tunnel.

3. A seismic measuring device for blasting construction of a large-span tunnel according to claim 1, characterized in that: A clamping block (14) is provided at one end of each vibration sensor (4), and an external thread (15) is provided on the outer side of each clamping block (14), and a thread groove (7) matching the clamping block (14) is provided on each mounting block (8).

4. A seismic measuring device for blasting construction of a large-span tunnel according to claim 1, characterized in that: An aluminum plate (17) is provided on one side of the main antenna (9), and a silver film is plated on the aluminum plate (17).

5. A seismic measuring device for blasting construction of a large-span tunnel according to claim 4, characterized in that: Sub-antennas (16) are evenly distributed on the aluminum plates (17) on both sides of the main antenna (9), and the sub-antennas (16) are all connected to the main antenna (9).

6. A seismic measuring device for blasting construction of a large-span tunnel according to claim 1, characterized in that: One end of the fixing bolt (10) is connected and fixed via a locking nut (6), and the side of the locking nut (6) close to the mounting member (2) is tightly fitted to the mounting member (2) via a buffer gasket (11).

7. A seismic measuring device for blasting construction of a large-span tunnel according to claim 6, characterized in that: A bulge (13) is provided on one side of the buffer gasket (11) close to the locking nut (6), and an elastic member (12) is provided between the bulge (13) and the locking nut (6); the elastic member (12) is an arched structure, and the elastic member (12) is made of a rubber strip.

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