CN109540352B - Tunnel secondary lining embedded pressure sensing network structure and monitoring method thereof - Google Patents
Tunnel secondary lining embedded pressure sensing network structure and monitoring method thereof Download PDFInfo
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- CN109540352B CN109540352B CN201910077273.9A CN201910077273A CN109540352B CN 109540352 B CN109540352 B CN 109540352B CN 201910077273 A CN201910077273 A CN 201910077273A CN 109540352 B CN109540352 B CN 109540352B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012806 monitoring device Methods 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 6
- 238000005034 decoration Methods 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21F17/18—Special adaptations of signalling or alarm devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a tunnel secondary lining embedded pressure sensing network structure, which comprises a cylindrical lead box, wherein six leads with equal length are uniformly led out from the lead box at equal included angles by taking the center of the lead box as a reference point, the tail ends of the leads are connected through connecting wires to form a regular hexagon, and the front ends of the six leads are correspondingly connected with six interfaces uniformly arranged in the lead box respectively; three pressure sensors are connected to the six leads at intervals, namely, only one pressure sensor is arranged on each two adjacent leads, and only one pressure sensor is arranged on each two adjacent connecting lines on the regular hexagon connecting line. A monitoring device which is matched with the cylindrical lead box and can communicate data is inserted into the cylindrical lead box. The invention also discloses a monitoring method using the structure. Accurate positioning of the pressure point is achieved by utilizing the monitoring network, regular tunnel health monitoring is achieved, and feedback is conducted on the internal monitoring network through the external monitoring receiving device.
Description
Technical Field
The invention relates to the field of pressure monitoring, in particular to a tunnel secondary lining embedded pressure sensing network structure and a monitoring method thereof.
Background
In recent years, the rapid development of infrastructure construction enterprises such as subways, high-speed rails and the like is realized, and tunnel construction work in China enters a rapid development period. The conditions such as mountain engineering geology and hydrogeology that the tunnel passed through are complicated, and each section construction technology has the difference, leads to the tunnel to appear vault fracture, side wall fracture, vault cavity, tree building damage, tunnel leakage water, surrounding rock big deformation etc. health problems in the use, and the accident of numerous problems is just tunnel fracture, and tunnel crack further expands under the effect of pressure, leads to tunnel structure's wholeness to lose, and pressure water invasion crack finally makes great tunnel accident. In the tunnel operation process, tunnel settlement and stress change caused by the conditions of surface change, geological condition change, newly-added building, static and dynamic load change and the like are important reasons for tunnel cracks.
Chinese patent CN105469582a discloses a system for collecting pressure wave of tunnel and a data collecting method thereof, but this method aims at a data collecting method of pressure wave, and does not provide a specific monitoring way for pressure change of tunnel structure.
Chinese patent 201620857051.0 discloses a novel resistance strain type soil pressure cell sensor, which does not realize additional measurement network, can only monitor a plurality of points, and cannot realize net monitoring and positioning of pressure points.
Chinese patent application 201510330076.5 discloses a hydraulic burying device and burying method for an outer side wall soil pressure cell, but the design of an external monitoring device is not realized in the application.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a tunnel secondary lining embedded pressure sensing network structure and a monitoring method thereof, which utilize a monitoring network to accurately position pressure points, realize regular tunnel health monitoring and feed back an internal monitoring network through an external monitoring receiving device.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the tunnel secondary lining embedded pressure sensing network structure comprises a cylindrical lead box, six equal-length radial leads are uniformly led out from the lead box by taking the center of the lead box as a reference point, the tail ends of the radial leads are connected through weft leads to form a regular hexagon, and the front ends of the six radial leads are correspondingly connected with six interfaces uniformly arranged in the lead box respectively;
three pressure sensors are connected to the six radial leads at intervals, namely, only one radial lead is arranged on each two adjacent radial leads, and only one weft lead is arranged on each two adjacent weft leads on the regular hexagon weft lead.
The cylindrical lead box is internally inserted with a monitoring device which is matched with the cylindrical lead box and can be used for data communication.
The six interfaces comprise lead posts which are arranged on the inner wall of the lead box at equal intervals, each lead post face towards the center of the lead box is provided with a lead bar, and the lead bars are connected with one end of the radial lead.
The lead box is provided with a connecting hole for the radial lead to penetrate out.
The upper end face of the lead box is provided with a groove matched with the protruding column in the lower cylindrical connector of the monitoring device, after the groove and the protruding column are combined, the groove play a role in positioning, and further the corresponding positions of the other lead bars and the lead grooves in the monitoring device are fixed, so that the numerical value of the sensor can be accurately positioned during detection.
The lead box is poured into the tunnel structure body along with the concrete, the pouring depth of the lead box is higher than the height of the secondary lining concrete and slightly higher than the decoration layer of the tunnel, and the corresponding lead box cover is arranged on the lead box.
The radial or latitudinal pressure sensor is a high-strength embedded silicon piezoresistive pressure sensing resistor, the sensing resistor is wrapped by a high polymer soft jacket, and the lead joint of the sensing resistor is bonded and sealed by a high polymer adhesive.
The monitoring device comprises an upper display and a lower cylindrical connector which are of an integral structure, the cylindrical connector comprises a cylinder, six lead grooves matched with the six lead posts and the lead lines on the inner wall of the lead box are formed in the outer circumference of the cylinder, metal strips contacted with the lead strips are arranged in the lead grooves, and data lines connected with the upper display are connected to the metal strips.
The display is internally provided with a pressure information acquisition and processing system. The pressure information collecting and processing system is an existing system and is not described herein.
A monitoring method for a pre-buried pressure sensing network structure by utilizing a tunnel secondary lining comprises the following steps:
1) Embedding a pressure sensing network structure in a secondary lining structure of a tunnel, reserving space of warp and weft pressure sensors in the tunnel of the primary lining, respectively arranging the warp and weft pressure sensors at corresponding positions, paving radial and weft leads on the inner wall of the tunnel, and carrying out secondary lining construction;
2) The lead box is poured into the tunnel structure body along with the concrete, the pouring depth of the lead box is higher than the height of the secondary lining concrete and slightly higher than the decoration layer of the tunnel, and the corresponding lead box cover is arranged on the lead box;
3) During monitoring, a monitoring device is inserted into a lead box, lead wires in the lead box are communicated with metal strips of a cylindrical connector of the monitoring device, a pressure information acquisition processing system acquires pressure signals at different positions and records and stores the pressure signals, and the pressure information acquisition processing system acquires and identifies and determines pressure signals of different warp and weft pressure sensors by controlling the breaking of different warp and weft leads, so as to determine the compression change of each point;
4) After the monitoring is finished, the monitoring device is pulled out of the lead box, and the lead box can be sealed through the lead box cover, so that the lead box is kept clean when the lead box is not monitored.
The beneficial effects of the invention are as follows:
1) According to the invention, the pressure sensor with the information acquisition function is embedded in the concrete tunnel structure body, so that the monitoring of the internal pressure of the structure body is realized, and the prevention and control at the initial stage of stress change are facilitated.
2) The invention is connected by the hexagonal lead wire network, has simple circuit communication and large monitoring area, can realize pressure monitoring by points and surfaces, and is beneficial to the identification of key pressure parts.
3) The invention adopts a multi-measuring-point circulation monitoring system, can realize regional pressure monitoring and pressure change trend of each measuring point, and determines the pressure applying position through the pressure change of each measuring point.
4) The cylindrical connector of the monitoring device is provided with a groove which is matched with the binding post of the lead box, so that the accurate correspondence of six interfaces during installation and use is ensured. The lead bar at the interface in the lead box is contacted with the metal bar in the groove of the monitoring device to form a communication circuit, the data feedback of each pressure sensor is realized through the pressure information acquisition and processing system, the monitoring steps and the program are simplified, and the data of a plurality of measuring points are collected by one sensing display.
Drawings
FIG. 1 is a schematic diagram of a pressure sensing network configuration of the present invention;
FIG. 2 is a schematic view of a leadframe and a terminal stud according to the present invention;
fig. 3 is a schematic view showing the connection between the lead box and the net structure of the present invention
FIG. 4 is a schematic view of a cylindrical connector of the monitoring device of the present invention;
fig. 5 is a cross-sectional view of a cylindrical connector of the monitoring device of the present invention.
The wire box 1, the warp-direction wire, the weft-direction pressure sensor 4, the warp-direction pressure sensor 5, the wire column 6, the wire bar 7, the wire bar 8, the groove 9, the cylindrical connector 10, the wire slot 11, the metal strip 12, the connecting hole 13 and the protruding column.
Description of the embodiments
The invention will be further described with reference to the drawings and examples.
The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
As shown in fig. 1-5, the tunnel secondary lining embedded pressure sensing network structure comprises a cylindrical lead box 1, six equal-length warp leads 2 are uniformly and outwardly led out from the lead box 1 by taking the center of the lead box 1 as a reference point, the tail ends of the radial leads 2 are connected through weft leads 3 to form a regular hexagon, and the front ends of the warp leads 2 are correspondingly connected with six uniformly built-in interfaces of the lead box 1 respectively;
three warp pressure sensors 5 are connected to the six warp leads 2 at intervals, namely, only one warp pressure sensor 5 is arranged on each two adjacent warp leads 2, only one weft lead 3 is arranged on each two adjacent weft leads 3, and as shown in fig. 1, the six weft pressure sensors are respectively marked as A, B, C, D, E, F.
The lead bar 7, the lead bar 7 and the warp lead 2 are connected through a connecting hole 12.
Six lead posts 6 are arranged in the lead box 1, and the lower cylindrical connector of the monitoring device corresponds to the lead groove 10 when the lower cylindrical connector of the monitoring device is inserted into the lead box. The groove 8 on the upper end surface of the lead box 1 is correspondingly clamped with the protruding column 13 in the connector at the lower part of the detection device, so that the positioning function is realized, and the corresponding positions of the other six lead strips and the lead grooves in the detection device are further fixed. The lead box 1 is poured into the tunnel structure body along with the concrete, the pouring depth is higher than the height of the secondary lining concrete, and is slightly higher than the decoration layer of the tunnel, and the corresponding lead box cover is arranged on the lead box 1.
The warp and weft pressure sensors 5 and 4 are high-strength embedded silicon piezoresistive pressure sensing resistors, the sensing resistors are wrapped by polymer soft jackets, and the lead joints of the sensing resistors are bonded and sealed by polymer adhesives.
Fig. 4 is a transverse cross-section of the lower cylindrical connector 9 of the detection device of fig. 5. The cylindrical lead box 1 is internally inserted with a monitoring device which is matched with the cylindrical lead box and can carry out data communication. The monitoring device comprises an upper display and a lower cylindrical connector 9 which are integrally structured, the cylindrical connector 9 comprises a cylinder, six lead grooves 10 matched with six lead posts 6 and lead bars 7 on the inner wall of the lead box are formed in the outer circumference of the cylinder, metal bars 11 in contact with the lead bars 7 are arranged in the lead grooves 10, and data wires connected with the upper display are connected to the metal bars 11.
The lead box 1 is inserted into the cylindrical connector 9 to be communicated with the cylindrical connector, and the section size of the cylindrical connector 9 is slightly smaller than the inner diameter of the lead box 1, so that the cylindrical connector 9 can be mutually matched with the inner diameter of the lead box. The monitoring device can receive external pressure signals after being communicated, and single-circuit communication is realized by closing different lead interfaces, so that the pressure at different positions is measured. After the monitoring is finished, feedback can be carried out to an external network, so that real-time long-acting monitoring is realized. After the monitoring is finished, the monitoring device is pulled out.
The display is internally provided with a pressure information acquisition and processing system. The pressure information collecting and processing system is an existing system and is not described herein.
A monitoring method for a pre-buried pressure sensing network structure by utilizing a tunnel secondary lining comprises the following steps:
1) Pre-embedding a pressure sensing network structure in a tunnel secondary lining structure, reserving space of warp and weft pressure sensors in the tunnel of the primary lining, respectively arranging pressure sensors A, B, C, D, E, F at corresponding positions, paving leads on the inner wall of the tunnel, and performing secondary lining construction;
2) The lead box is poured into the tunnel structure body along with the concrete, the pouring depth is higher than the height of the secondary lining concrete and slightly higher than the decoration layer of the tunnel, and the corresponding lead box cover is arranged on the lead box 1;
3) During monitoring, a monitoring device is inserted into a lead box, a lead strip 7 in the lead box is communicated with a metal strip 11 of a cylindrical connector 9 of the monitoring device, a pressure information acquisition processing system acquires pressure signals at different positions and records and stores the pressure signals, and the pressure information acquisition processing system acquires and identifies and determines pressure signals of different warp and weft pressure sensors by controlling the breaking of different warp and weft leads, so as to determine the compression change of each point;
as shown in fig. 1, in the specific monitoring:
the control system is communicated with the lead posts a and b, so that the indication display of the radial pressure sensor A can be realized. The control system is communicated with the lead posts b and D, so that the indication display of the weft pressure sensor D can be realized. The control system is communicated with the lead posts c and d, so that the indication display of the radial pressure sensor B can be realized. The control system is communicated with the lead posts d and f, so that the indication display of the weft pressure sensor E can be realized. The control system is communicated with the lead posts e and f, so that the indication display of the radial pressure sensor C can be realized. The control system is communicated with the lead posts F and b, so that the indication display of the weft pressure sensor F can be realized.
4) After the monitoring is finished, the monitoring device is pulled out of the lead box, and the lead box can be sealed through the lead box cover, so that the lead box is kept clean when the lead box is not monitored.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (8)
1. The tunnel secondary lining embedded pressure sensing network structure is characterized by comprising a cylindrical lead box, wherein six radial leads with equal length are uniformly led out from the lead box at equal included angles by taking the center of the lead box as a reference point, the tail ends of the radial leads are connected through weft leads to form a regular hexagon, and the front ends of the six radial leads are correspondingly connected with six uniformly built-in interfaces of the lead box respectively;
three pressure sensors are connected to the six radial leads at intervals, namely, only one radial lead is provided with one radial pressure sensor, and only one weft lead is provided with one pressure sensor;
the cylindrical lead box is internally inserted with a monitoring device which is matched with the cylindrical lead box and can be used for data communication;
the lead box is provided with a connecting hole for the radial lead to penetrate out.
2. The tunnel two-liner embedded pressure sensing network structure of claim 1, wherein the six interfaces comprise lead posts which are arranged on the inner wall of the lead box at equal intervals, each lead post face towards the center of the lead box is provided with a lead bar, and the lead bars are connected with one end of a radial lead.
3. The tunnel two-lining embedded pressure sensing network structure of claim 1, wherein a groove matched with a protruding column in a lower column connector of the monitoring device is arranged on the upper end face of the lead box.
4. The tunnel secondary lining embedded pressure sensing network structure according to claim 1, wherein the lead box is poured into the tunnel structure body along with concrete, the pouring depth of the lead box is higher than the height of the secondary lining concrete and slightly higher than the tunnel decoration layer, and the corresponding lead box cover is arranged on the lead box.
5. The tunnel secondary lining embedded pressure sensing network structure of claim 1, wherein the radial or latitudinal pressure sensor is a high-strength embedded silicon piezoresistive pressure sensing resistor, the sensing resistor is wrapped by a polymer soft jacket, and a lead joint of the sensing resistor is bonded and sealed by a polymer adhesive.
6. The tunnel two-lining embedded pressure sensing network structure according to claim 1, wherein the monitoring device comprises an upper display and a lower cylindrical connector which are integrally structured, the cylindrical connector comprises a cylinder, six lead grooves matched with six lead columns and lead lines on the inner wall of the lead box are formed in the outer circumference of the cylinder, metal strips contacted with the lead strips are arranged in the lead grooves, and data wires connected with the upper display are connected to the metal strips.
7. The tunnel two-lining embedded pressure sensing network structure according to claim 6, wherein a pressure information acquisition and processing system is arranged in the display.
8. A monitoring method for a pre-buried pressure sensing network structure by utilizing a tunnel secondary lining comprises the following steps:
1) Embedding a pressure sensing network structure in a secondary lining structure of a tunnel, reserving space of warp and weft pressure sensors in the tunnel of the primary lining, respectively arranging the warp and weft pressure sensors at corresponding positions, paving radial and weft leads on the inner wall of the tunnel, and carrying out secondary lining construction;
2) The lead box is poured into the tunnel structure body along with the concrete, the pouring depth of the lead box is higher than the height of the secondary lining concrete and slightly higher than the decoration layer of the tunnel, and the corresponding lead box cover is arranged on the lead box;
3) During monitoring, a monitoring device is inserted into a lead box, lead wires in the lead box are communicated with metal strips of a cylindrical connector of the monitoring device, a pressure information acquisition processing system acquires pressure signals at different positions and records and stores the pressure signals, and the pressure information acquisition processing system acquires and identifies and determines pressure signals of different warp and weft pressure sensors by controlling the breaking of different warp and weft leads, so as to determine the compression change of each point;
4) After the monitoring is finished, the monitoring device is pulled out of the lead box, and the lead box can be sealed through the lead box cover, so that the lead box is kept clean when the lead box is not monitored.
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| CN201910077273.9A CN109540352B (en) | 2019-01-28 | 2019-01-28 | Tunnel secondary lining embedded pressure sensing network structure and monitoring method thereof |
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| CN201910077273.9A CN109540352B (en) | 2019-01-28 | 2019-01-28 | Tunnel secondary lining embedded pressure sensing network structure and monitoring method thereof |
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| CN110455236A (en) * | 2019-07-30 | 2019-11-15 | 山东大学 | A kind of pressure sensitive device and application method for tunnel double-lining thickness monitor |
| CN110645941A (en) * | 2019-09-12 | 2020-01-03 | 山东大学 | Pressure sensing device and monitoring method for monitoring thickness of tunnel secondary lining |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014089183A (en) * | 2012-10-03 | 2014-05-15 | Seiko Instruments Inc | Pressure sensor |
| CN209230836U (en) * | 2019-01-28 | 2019-08-09 | 山东科技大学 | The pre-buried pressure sensing net structure of tunnel double-lining |
| CN111608730A (en) * | 2020-05-22 | 2020-09-01 | 中铁隧道局集团有限公司 | Pressure box embedding method for monitoring pressure of each layer of tunnel multi-layer support |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014089183A (en) * | 2012-10-03 | 2014-05-15 | Seiko Instruments Inc | Pressure sensor |
| CN209230836U (en) * | 2019-01-28 | 2019-08-09 | 山东科技大学 | The pre-buried pressure sensing net structure of tunnel double-lining |
| CN111608730A (en) * | 2020-05-22 | 2020-09-01 | 中铁隧道局集团有限公司 | Pressure box embedding method for monitoring pressure of each layer of tunnel multi-layer support |
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