CN112832866A - Tunnel whole life cycle monitoring and early warning system and building method - Google Patents
Tunnel whole life cycle monitoring and early warning system and building method Download PDFInfo
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- CN112832866A CN112832866A CN202011615293.6A CN202011615293A CN112832866A CN 112832866 A CN112832866 A CN 112832866A CN 202011615293 A CN202011615293 A CN 202011615293A CN 112832866 A CN112832866 A CN 112832866A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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Abstract
The invention discloses a monitoring and early warning system and a construction method for the whole life cycle of a tunnel. Compared with the prior art, the tunnel structure internal stress and surface strain combined monitoring and early warning system realizes the automatic monitoring of the structural safety of the tunnel in the whole life cycle from construction to operation, and realizes the automatic evaluation and early warning functions of the tunnel structure safety by combining the evaluation and early warning system integrated by the server. The system and the construction method are efficient and convenient, can guide tunnel construction and later-stage operation in time, and have high practical significance.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a monitoring and early warning system for the whole life cycle of a tunnel and a construction method.
Background
At present, with the planning and construction of a plurality of storage area highways and storage access railways, more and more oversized buried deep tunnels need to be constructed. In western mountainous areas of China, due to extremely special regional geological structure environments, deep rock mass engineering is often in a relatively complex geomechanical environment. Therefore, the tunnel structure is often under complicated stress conditions, which brings great difficulty to the construction of the tunnel.
After the tunnel construction is completed and the tunnel construction is put into operation, the durability problem of the tunnel structure cannot be ignored, and the safe operation of the tunnel can be seriously influenced by water leakage, cracking and other diseases, even the tunnel lining can be damaged when the water leakage, the cracking and other diseases are serious, so that the overall safety of the tunnel structure is influenced.
The key means for solving the problems is the health monitoring of the tunnel structure, construction is fed back through monitoring, dynamic construction is carried out, and the stress state of the structure is known in time so as to ensure that tunnel construction parameters are reasonable and structural design parameters are reasonable. During operation, the durability state of the two lining structures is needed to be known, and the condition that the normal operation is influenced by the serious damage of the lining is avoided.
However, in the construction and operation of most tunnels in China, the monitoring system and the monitoring technology adopted still have many defects:
1. the tunnel construction monitoring is mainly used for deformation monitoring, when deformation is obvious, the stress of the structure mostly exceeds the limit, the structure possibly enters a plastic state, subsequent normal use is difficult to satisfy again, and the monitoring has obvious hysteresis.
2. The monitoring sensor installed in the tunnel construction period is greatly influenced by tunnel construction, and the problems of inaccurate monitoring and low survival rate of the sensor are easily caused.
3. The stress state of the tunnel structure is difficult to be comprehensively reflected by installing a single monitoring sensor.
4. Most of tunnel monitoring is used for tunnel construction, and monitoring in an operation period is too little to serve the whole life cycle of the tunnel.
5. Because the vibrating wire type sensor is installed inside the tunnel structure, the vibrating wire type sensor cannot be corrected or replaced in the later period when the sensor is inaccurate or invalid in monitoring, and the monitoring of the whole life cycle of the health state of the tunnel structure is a huge difficulty.
6. After the sensor is installed, most of monitoring data needs manual collection and processing, and when the structure goes wrong, the monitoring data is difficult to reflect in time.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a monitoring and early warning system for the whole life cycle of a tunnel and a construction method.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
a monitoring and early warning system for the whole life cycle of a tunnel comprises a plurality of vibrating string sensors and fiber bragg grating sensors, wherein the vibrating string sensors and the fiber bragg grating sensors are arranged on an upper arch ring and a side wall of a monitoring section of the tunnel; the data acquisition device is connected with the vibrating wire sensors and the fiber bragg grating sensors and is used for receiving monitoring data acquired by the vibrating wire sensors and the fiber bragg grating sensors; and a data processing and transmitting device connected with the data acquisition device; and the data storage and analysis device is connected with the data processing and transmission device and is used for receiving the monitoring data transmitted by the data processing and transmission device, processing the monitoring data and giving out early warning when the monitoring system automatically identifies dangerous monitoring data.
Further, the vibrating wire type sensor comprises a water pressure gauge, a soil pressure box, a steel bar gauge and a concrete gauge;
the water pressure gauge is arranged in surrounding rocks at the vault, left and right arch shoulders and left and right arch waists of the tunnel, and one water pressure gauge is arranged at each part;
the soil pressure cell is arranged behind a tunnel steel arch center at the arch crown, the left arch shoulder, the right arch shoulder and the left arch waist of the tunnel, one soil pressure cell is arranged at each part, and the pressure cells are in contact with surrounding rocks;
the steel bar meters are arranged on the inner sides of the inner flange and the outer flange of the tunnel steel arch at the arch crown, the left arch shoulder, the right arch shoulder and the left arch waist of the tunnel, and one steel bar meter is respectively arranged on the inner flange and the outer flange of the tunnel steel arch at each position;
the concrete meters are arranged on reinforcing steel bars of the inner wall and the outer wall of the secondary lining at the arch crown, the left arch shoulder, the right arch shoulder, the left arch waist and the right arch foot of the tunnel, and one concrete meter is arranged on the reinforcing steel bar of the inner wall and the outer wall of the secondary lining at each position.
Further, the fiber grating sensor comprises a surface strain gauge, a crack meter and an accelerometer;
the surface strain gauge and the crack meter are perpendicular to the axial direction of the tunnel and are arranged on the inner wall of the secondary lining at the arch crown, the left arch shoulder, the right arch shoulder and the left arch foot of the tunnel, and one surface strain gauge and one crack meter are arranged at each part;
the accelerometers are arranged on the inner walls of the secondary lining at the arch crown, the left arch shoulder, the right arch shoulder and the left arch foot of the tunnel, and two accelerometers are arranged at each position and are respectively parallel to the axial direction of the tunnel and perpendicular to the axial direction of the tunnel.
Furthermore, the data processing and transmitting device comprises a protocol converter, an optical fiber switch, an optical cable junction box and a serial server, wherein the data acquisition device is connected with the protocol converter through an RS458 bus, the protocol converter is connected with the optical fiber switch through an optical fiber, and the optical fiber switch is connected with the optical cable junction box through the optical fiber; the data storage and analysis device is a remote operation server, and the optical cable junction box is connected with the remote operation server through optical fibers.
Furthermore, the inner wall of the secondary lining of the tunnel is provided with a reserved hole, the data acquisition device is fixed in the reserved hole, and plugs of the vibrating string sensors and the fiber bragg grating sensors are integrated into the reserved hole.
Furthermore, the data processing and transmitting device is installed in a PLC control cabinet of a vehicle transverse passage closest to the tunnel monitoring section.
In addition, the invention also provides a method for building the monitoring and early warning system of the whole life cycle of the tunnel, which comprises the following steps:
1) after the tunnel is excavated, after the tunnel face steel arch frame is installed, a water pressure gauge, a soil pressure box and a steel bar gauge are installed, the water pressure gauge, the soil pressure box and the steel bar gauge are wired through the arch frame, and plugs of the water pressure gauge, the soil pressure box and the steel bar gauge are arranged on one side of the arch waist of the cross section in a unified mode;
2) after the water pressure gauge, the soil pressure box and the steel bar gauge are installed, drilling an anchor rod, and spraying concrete in time for sealing; data acquisition work is carried out once a day, and the stress condition of the structure is known in time by monitoring data feedback construction;
3) after the primary support of the tunnel is finished and the secondary lining waterproof board trolley is pushed to the monitoring section, a concrete meter is installed, the waterproof layer is finished when the installation, and the inner and outer reinforcing steel bars of the secondary lining are bound;
4) pouring a secondary lining, reserving a reserved hole, and introducing plugs of a water pressure gauge, a soil pressure box, a steel bar gauge and a concrete gauge into the reserved hole; meanwhile, data acquisition work of all installed sensors is carried out once a day, and the stress condition of the structure is known in time by monitoring data feedback construction;
5) after finishing the construction of the secondary lining, mounting a surface strain gauge, a crack meter and an accelerometer; the surface strain gauge, the crack gauge and the plug of the accelerometer are uniformly arranged in the reserved hole;
6) after the electromechanical mark of the tunnel starts, installing a data acquisition device in the reserved hole, connecting plugs of all sensors, installing a protocol converter, an optical fiber switch, an optical cable junction box and a serial server in a PLC cabinet in a vehicle transverse channel closest to the section, leading out electric wires from the position to supply power to the reserved hole, leading out data information acquired by the data acquisition device, and routing the electric cables and the optical cables through the inner surface of a secondary lining;
7) installing a remote operation server and other matched software and hardware facilities in the tunnel monitoring center;
8) after the tunnel construction is finished and the network in the tunnel and the network of the tunnel monitoring center are connected, the full-life cycle and full-automatic monitoring of the tunnel structure stress and the surface strain are realized, the monitoring data are processed, and when the monitoring system automatically identifies dangerous monitoring data, an early warning is sent out to guide the safe operation of the tunnel.
Compared with the prior art, the method can effectively overcome the important defects of obvious hysteresis, low survival rate of the monitoring sensor, no replacement, single reflected information of monitoring data, large labor requirement, incapability of serving the whole life cycle of the tunnel and the like in the common traditional monitoring method; through the common networking of vibrating wire formula sensor and fiber grating sensor, realize automatic acquisition, transmission, analysis and processing and visual of monitoring data to combine integrated evaluation and early warning algorithm model in the remote operation server, in time early warning when tunnel structure is in dangerous state, in time guide tunnel construction and operation, guarantee tunnel operation safety. The vibrating wire type sensor is mainly used in the tunnel construction period and the initial construction and operation period, the fiber grating sensor is mainly used in the tunnel operation period, and the vibrating wire type sensor and the fiber grating sensor jointly realize the automatic monitoring of the whole life cycle of the tunnel.
The tunnel structure internal stress and surface strain combined monitoring and early warning system realizes the automatic monitoring of the structural safety of the tunnel in the whole life cycle from construction to operation, and realizes the automatic evaluation and early warning functions of the tunnel structure safety by combining the evaluation and early warning system integrated by the server. The system and the construction method are efficient and convenient, can guide tunnel construction and later-stage operation in time, and have high practical significance.
Drawings
FIG. 1 is a schematic diagram of the arrangement positions of a vibrating wire sensor and a fiber grating sensor according to the present invention.
FIG. 2 is a diagram of sensor traces according to the present invention.
FIG. 3 is a schematic diagram of a vibrating wire sensor and fiber grating sensor combined networking system according to the present invention.
Fig. 4 is a schematic view of the relative positions of the monitoring section, the collecting device and the transmission cable (the reserved hole is on the same side as the transverse traffic channel) in the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Example 1
As shown in fig. 1 to 4, the monitoring and early warning system for the whole life cycle of a tunnel according to the present embodiment includes a plurality of vibrating string sensors and fiber bragg grating sensors mounted on an upper arch ring and a side wall of a monitoring section of the tunnel; the data acquisition device 8 in the embodiment adopts a data acquisition instrument which is purchased from the market and is matched with the vibrating wire type sensor and the fiber bragg grating sensor, and the data acquisition device 8 is used for receiving monitoring data acquired by the vibrating wire type sensor and the fiber bragg grating sensor; and a data processing and transmitting device connected with the data acquisition device 8; the data processing and transmitting device comprises a protocol converter 9, an optical fiber switch 10, an optical cable junction box 11 and a serial server 12; and the data storage and analysis device 13 is connected with the data processing and transmission device, the data storage and analysis device 13 is a remote operation server, and the data storage and analysis device is used for receiving the monitoring data transmitted by the data processing and transmission device, processing the monitoring data, and giving out an early warning when the monitoring system automatically identifies dangerous monitoring data. The devices are connected through wires, and the wire connection mode comprises cable connection and optical cable connection.
The vibrating string type sensor comprises a water pressure gauge 1, a soil pressure cell 2, a steel bar gauge 3 and a concrete gauge 4;
the water pressure gauge 1 is arranged on an arch ring and a side wall on the upper portion of the tunnel, the concrete positions of the water pressure gauge are a vault, a left arch shoulder, a right arch shoulder and a left arch waist, 1 water pressure gauge is arranged on each position, the concrete position of the water pressure gauge is inside surrounding rock, and the water pressure gauge is fixed in a drilling mode and then plugged in.
Furthermore, the soil pressure cell 2 is installed in tunnel upper portion arch ring and side wall, and specific position is the vault, control the hunch shoulder and control the hunch waist, and 1 soil pressure cell is installed to every position, and specific position is behind the hunch frame, and the fixed mode is the welding.
Further, the reinforcing bar meter 3 is installed on an arch ring and a side wall on the upper portion of the tunnel, specific positions of the reinforcing bar meter are a vault, a left arch shoulder, a right arch shoulder and a left arch waist, 2 reinforcing bar meters are installed on each position, specific positions of the reinforcing bar meters are the inner sides of inner and outer flanges of the arch frame, and the fixing mode is welding.
Further, the concrete gauges 4 are installed on an arch ring and a side wall on the upper portion of the tunnel, the concrete positions of the concrete gauges are a vault, a left arch shoulder, a right arch shoulder, a left arch waist and a right arch foot, 2 concrete gauges are installed on each position, specific positions of the concrete gauges are two linings on inner and outer side reinforcing steel bars, and the fixing mode is wire binding fixing.
The fiber bragg grating sensor comprises a surface strain gauge 5, a crack gauge 6 and an accelerometer 7, and is mounted on an arch ring and a side wall on the upper portion of the tunnel, the concrete portions of the fiber bragg grating sensor are a vault, a left arch shoulder, a right arch shoulder and a left arch foot and a right arch foot, and the concrete positions of the fiber bragg grating sensor are inner surfaces of two linings. Wherein 1 direction of each part of the surface strain gauge and the crack gauge is vertical to the axial direction of the tunnel; the accelerometers are installed 2 per site, in directions parallel and perpendicular to the tunnel axis.
Furthermore, the lengths of the plug wires of the vibrating string sensor and the fiber grating sensor are different from 5m to 35m, and an appropriate wire length is selected according to the distance from the installation position to the reserved hole. After the sensor is wired, the sensor plug is integrated to one side of the monitoring section, and enough space is reserved on the side, namely a hole is reserved.
Furthermore, the data acquisition device is arranged in a reserved space near the monitoring section, is connected with the sensor plug, and integrates and processes vibrating wire signals and optical fiber signals.
Furthermore, the data processing and transmitting device is installed in a PLC control cabinet of a vehicle transverse passage closest to the monitoring section, the data acquisition device and the data processing and transmitting device are connected through a wire, and all monitoring data are converted into network communication at the position and uploaded to the monitoring center.
Furthermore, the data storage and analysis device is positioned in a monitoring center of a tunnel operation department and used for receiving and processing the monitoring signal.
Furthermore, the early warning function is mainly realized through an algorithm model integrated in a remote operation server, when the monitoring system automatically identifies dangerous monitoring data, early warning can be sent out, and the dangerous standard can be set artificially.
Furthermore, the vibrating wire type sensor is installed in the construction period, has the non-replaceable characteristic and can serve tunnel construction and short-term operation, the fiber bragg grating sensor is installed after the second-lining construction is completed, has the replaceable characteristic and can serve long-term operation of the tunnel, and the fiber bragg grating sensor and the second-lining construction are jointly networked to form a monitoring and early warning system of the whole life cycle of the tunnel; and the rest equipment is arranged in the electromechanical construction period of the tunnel.
Example 2
A method for building a tunnel life cycle monitoring and early warning system comprises the following steps:
1) the tunnel is excavated by adopting an upper-lower step method, and firstly, an advanced pipe shed support is constructed. And excavating the upper step excavation part of the tunnel, immediately paving a reinforcing mesh after excavation, and setting a profile steel arch frame. At the moment, the water pressure gauge, the soil pressure cell and the steel bar gauge can be installed, the installation positions are the vault, the left arch shoulder, the right arch shoulder and the left arch waist, 1 water pressure gauge and the soil pressure cell are installed at each position, and 2 steel bar gauges are installed at each position. Drilling a hole in the surrounding rock, wherein the hole diameter is 4cm, the hole depth is 20cm, and the bottom of the water pressure gauge is wrapped by geotextile and then is plugged into the drilled hole for fixing; the soil pressure cell is welded and fixed at the back of the arch center and is contacted with the surrounding rock; the reinforcing bar meter is welded and fixed on the inner sides of flanges on two sides of the arch frame. The sensors are wired through the arch frame, the plugs are uniformly arranged on one side of the arch waist of the section, and the dotted line shown in fig. 2 is the wiring of the sensors.
2) And after the water pressure gauge, the soil pressure box and the steel bar gauge are installed, the anchor rod can be drilled, and concrete is sprayed in time and sealed. And data acquisition work is carried out, 1 time every day, and the stress condition of the structure is known in time by monitoring data feedback construction.
3) And after the primary support of the tunnel is finished, the two-lining waterproof plate trolley is pushed to the monitoring section, and then the installation work of the concrete meter can be carried out. The installation time is that the waterproof layer is completely constructed, and the inner and outer steel bars of the two liners are completely bound. The installation positions are vault, left and right arch shoulders, left and right arch waists and left and right arch feet, 2 parts are installed at each position, and one is arranged at the inner side and the outer side. The concrete meter is fixed on the inner and outer side steel bars through binding wires and is arranged to one side of the section through steel bar routing. Arranging the wire arranging plugs of all the vibrating wire sensors to the height of about 1.5m above the side drainage ditch of the tunnel.
4) Pouring a secondary lining, reserving a space with the width multiplied by the height multiplied by the depth =80cm multiplied by 20cm, and introducing a sensor plug into a reserved hole; meanwhile, data acquisition work of all installed sensors is carried out for 1 time every day, and the stress condition of the structure is known in time through monitoring data feedback construction.
5) After the secondary construction is finished, the installation work of the fiber grating sensor is carried out, the installation positions are a vault, left and right arch shoulders and left and right arch waists, and the installation positions are the inner surfaces of the two liners. 1 fiber grating surface strain gauge and 1 crack meter are arranged at each part and fixed by screws, and the installation direction is perpendicular to the axial direction of the tunnel; every position of the fiber bragg grating accelerometer is installed 2 and fixed through screws, and the installation direction is parallel to and perpendicular to the tunnel axis direction. The sensor wiring is fixed through the wire clip nail and is uniformly arranged in the reserved hole of the vibrating wire type sensor.
6) And after the electric mark of the tunnel machine starts, starting to install other equipment. And a data acquisition instrument, a switch, a patch board and the like are arranged in the reserved hole, and plugs of all monitoring sensors are accessed. And a protocol converter, an optical fiber switch, an optical cable junction box and a serial server are arranged in a PLC cabinet in the vehicle transverse channel closest to the section, an electric wire is led out from the PLC cabinet to supply power to the reserved hole, and data information acquired by the optical cable transmission data acquisition instrument is led out. The cable and the optical cable are both wired through the inner surfaces of the two liners.
7) And a remote operation server and other matched software and hardware facilities are installed in the tunnel monitoring center.
8) After the tunnel construction is finished and the network in the tunnel and the monitoring center is connected, the full-life cycle and full-automatic monitoring of the tunnel structure stress and the surface strain can be realized. And the early warning function can be realized by integrating the evaluation and early warning model through a software system preset in the operation server, so as to guide the safe operation of the tunnel.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides a monitoring and early warning system of tunnel full life cycle which characterized in that: the system comprises a plurality of vibrating string sensors and fiber bragg grating sensors which are arranged on an upper arch ring and a side wall of a tunnel monitoring section; the data acquisition device is connected with the vibrating wire sensors and the fiber bragg grating sensors and is used for receiving monitoring data acquired by the vibrating wire sensors and the fiber bragg grating sensors; and a data processing and transmitting device connected with the data acquisition device; and the data storage and analysis device is connected with the data processing and transmission device and is used for receiving the monitoring data transmitted by the data processing and transmission device, processing the monitoring data and giving out early warning when the monitoring system automatically identifies dangerous monitoring data.
2. The system of claim 1, wherein the system further comprises: the vibrating string type sensor comprises a water pressure gauge, a soil pressure box, a steel bar gauge and a concrete gauge;
the water pressure gauge is arranged in surrounding rocks at the vault, left and right arch shoulders and left and right arch waists of the tunnel, and one water pressure gauge is arranged at each part;
the soil pressure cell is arranged behind a tunnel steel arch center at the arch crown, the left arch shoulder, the right arch shoulder and the left arch waist of the tunnel, one soil pressure cell is arranged at each part, and the pressure cells are in contact with surrounding rocks;
the steel bar meters are arranged on the inner sides of the inner flange and the outer flange of the tunnel steel arch at the arch crown, the left arch shoulder, the right arch shoulder and the left arch waist of the tunnel, and one steel bar meter is respectively arranged on the inner flange and the outer flange of the tunnel steel arch at each position;
the concrete meters are arranged on reinforcing steel bars of the inner wall and the outer wall of the secondary lining at the arch crown, the left arch shoulder, the right arch shoulder, the left arch waist and the right arch foot of the tunnel, and one concrete meter is arranged on the reinforcing steel bar of the inner wall and the outer wall of the secondary lining at each position.
3. The system of claim 1 or 2, wherein the system comprises: the fiber bragg grating sensor comprises a surface strain gauge, a crack meter and an accelerometer;
the surface strain gauge and the crack meter are perpendicular to the axial direction of the tunnel and are arranged on the inner wall of the secondary lining at the arch crown, the left arch shoulder, the right arch shoulder and the left arch foot of the tunnel, and one surface strain gauge and one crack meter are arranged at each part;
the accelerometers are arranged on the inner walls of the secondary lining at the arch crown, the left arch shoulder, the right arch shoulder and the left arch foot of the tunnel, and two accelerometers are arranged at each position and are respectively parallel to the axial direction of the tunnel and perpendicular to the axial direction of the tunnel.
4. The system of claim 1, wherein the system further comprises: the data processing and transmitting device comprises a protocol converter, an optical fiber switch, an optical cable junction box and a serial server, wherein the data acquisition device is connected with the protocol converter through an RS458 bus, the protocol converter is connected with the optical fiber switch through an optical fiber, and the optical fiber switch is connected with the optical cable junction box through the optical fiber; the data storage and analysis device is a remote operation server, and the optical cable junction box is connected with the remote operation server through optical fibers.
5. The system of claim 1, wherein the system further comprises: the inner wall of the secondary lining of the tunnel is provided with a reserved hole, the data acquisition device is fixed in the reserved hole, and plugs of the vibrating string type sensors and the fiber bragg grating sensors are integrated into the reserved hole.
6. The system of claim 1, wherein the system further comprises: and the data processing and transmitting device is arranged in a PLC control cabinet of a vehicle transverse passage closest to the tunnel monitoring section.
7. A method for constructing a system for monitoring and warning the life cycle of a tunnel according to any one of claims 3 to 6, comprising the steps of:
1) after the tunnel is excavated, after the tunnel face steel arch frame is installed, a water pressure gauge, a soil pressure box and a steel bar gauge are installed, the water pressure gauge, the soil pressure box and the steel bar gauge are wired through the arch frame, and plugs of the water pressure gauge, the soil pressure box and the steel bar gauge are arranged on one side of the arch waist of the cross section in a unified mode;
2) after the water pressure gauge, the soil pressure box and the steel bar gauge are installed, drilling an anchor rod, and spraying concrete in time for sealing; data acquisition work is carried out once a day, and the stress condition of the structure is known in time by monitoring data feedback construction;
3) after the primary support of the tunnel is finished and the secondary lining waterproof board trolley is pushed to the monitoring section, a concrete meter is installed, the waterproof layer is finished when the installation, and the inner and outer reinforcing steel bars of the secondary lining are bound;
4) pouring a secondary lining, reserving a reserved hole, and introducing plugs of a water pressure gauge, a soil pressure box, a steel bar gauge and a concrete gauge into the reserved hole; meanwhile, data acquisition work of all installed sensors is carried out once a day, and the stress condition of the structure is known in time by monitoring data feedback construction;
5) after finishing the construction of the secondary lining, mounting a surface strain gauge, a crack meter and an accelerometer; the surface strain gauge, the crack gauge and the plug of the accelerometer are uniformly arranged in the reserved hole;
6) after the electromechanical mark of the tunnel starts, installing a data acquisition device in the reserved hole, connecting plugs of all sensors, installing a protocol converter, an optical fiber switch, an optical cable junction box and a serial server in a PLC cabinet in a vehicle transverse channel closest to the section, leading out electric wires from the position to supply power to the reserved hole, leading out data information acquired by the data acquisition device, and routing the electric cables and the optical cables through the inner surface of a secondary lining;
7) installing a remote operation server and other matched software and hardware facilities in the tunnel monitoring center;
8) after the tunnel construction is finished and the network in the tunnel and the network of the tunnel monitoring center are connected, the full-life cycle and full-automatic monitoring of the tunnel structure stress and the surface strain are realized, the monitoring data are processed, and when the monitoring system automatically identifies dangerous monitoring data, an early warning is sent out to guide the safe operation of the tunnel.
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| CN113487048A (en) * | 2021-07-06 | 2021-10-08 | 中建三局绿色产业投资有限公司 | Drainage tunnel operation safety monitoring and maintenance system and method |
| CN113898372A (en) * | 2021-09-01 | 2022-01-07 | 武汉市政工程设计研究院有限责任公司 | Full life cycle health monitoring system of deep tunnel of sewage |
| CN114323091A (en) * | 2021-12-29 | 2022-04-12 | 中铁第四勘察设计院集团有限公司 | Tunnel surrounding rock monitoring system and method |
| CN115562127A (en) * | 2022-11-02 | 2023-01-03 | 中南大学 | Bias tunnel monitoring control system |
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Application publication date: 20210525 |