CN213743527U - Optical fiber grating monitoring system for lower support of station in subway station construction process - Google Patents
Optical fiber grating monitoring system for lower support of station in subway station construction process Download PDFInfo
- Publication number
- CN213743527U CN213743527U CN202022485416.0U CN202022485416U CN213743527U CN 213743527 U CN213743527 U CN 213743527U CN 202022485416 U CN202022485416 U CN 202022485416U CN 213743527 U CN213743527 U CN 213743527U
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- Prior art keywords
- optical fiber
- grating
- grating optical
- wall
- station
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- Expired - Fee Related
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 70
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 238000012806 monitoring device Methods 0.000 claims abstract description 11
- 239000003292 glue Substances 0.000 claims abstract description 9
- 239000011378 shotcrete Substances 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims description 21
- 238000012423 maintenance Methods 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002313 adhesive film Substances 0.000 claims description 2
- 238000011897 real-time detection Methods 0.000 abstract 1
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
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Abstract
The utility model discloses a grating optical fiber monitoring system for a station lower support in the construction process of a subway station, which comprises a grating optical fiber sensor adhered to the top of the outer wall of a steel support along the axial direction of the steel support; the grating optical fiber protection film is bonded on the outer wall of the steel support and covers the grating optical fiber sensor; the grating optical fiber protection shell is buckled on the grating optical fiber sensor and is bonded on the outer wall of the steel support through waterproof glue; the foam filling layer is arranged on the inner side wall of the grating optical fiber protection shell; and the monitoring device is arranged at one end of the grating optical fiber sensor and connected with the grating optical fiber sensor. The device can real-time detection steel shotcrete's stress and meet an emergency, and then realizes the monitoring to the subway station side wall, has improved the security of subway station.
Description
Technical Field
The utility model relates to a subway construction monitoring devices technical field, concretely relates to grating fiber monitoring system that station lower part supported in subway station work progress.
Background
In the construction process of the subway station, the positions of the arch cover, the lower support (side wall) and the like are likely to have larger deformation and pressure due to the stress characteristics of the side wall, and in order to relieve the pressure and deformation of the side wall caused by the surrounding rock of the lower foundation pit and improve the stability of the subway station, steel supports are generally arranged between the side walls on two sides. However, the underground condition of the subway station is complex, the side wall at the lower part of the subway station can be continuously deformed under the action of the steel support, and how to detect the stress and strain of the side wall in real time has an important effect on the stability of the subway station.
SUMMERY OF THE UTILITY MODEL
The utility model provides a grating fiber monitoring system that station lower part supported in subway station work progress can realize real-time stress to subway station lower part both sides wall and the monitoring of meeting an emergency.
The utility model discloses a technical means as follows:
a grating optical fiber monitoring system of a station lower support in the construction process of a subway station comprises a grating optical fiber sensor which is stuck on the top of the outer wall of a steel support along the axial direction of the steel support;
the grating optical fiber protection adhesive film is bonded on the outer wall of the steel support and covers the grating optical fiber sensor;
the grating optical fiber protection shell is buckled on the grating optical fiber sensor and is bonded on the outer wall of the steel support through waterproof glue;
the foam filling layer is arranged on the inner side wall of the grating optical fiber protection shell; and the monitoring device is arranged at one end of the grating optical fiber sensor and connected with the grating optical fiber sensor.
Furthermore, the optical fiber grating optical fiber protection device further comprises a plurality of groups of protection shell reinforcing devices arranged along the axial direction of the steel support, each protection shell reinforcing device comprises two fastening belts which are oppositely arranged on two sides of the optical fiber grating protection shell, one end of each fastening belt is fixed on the outer side wall of the optical fiber grating protection shell, the other end of each fastening belt is provided with a bolt fixing portion, and the two fastening belts are buckled on the outer wall of the steel support and are fixedly connected through bolts.
Further, still include a plurality of maintenance doors, a plurality of maintenance doors set up on the upper sidewall of grating fiber optic protection casing along the axial direction of steel shotcrete.
Furthermore, a sealing rubber strip is arranged between the maintenance door and the upper side wall of the grating optical fiber protection shell.
Compared with the prior art, subway station work progress in the grating fiber monitoring system that station lower part supported have following advantage, through arranging grating fiber sensor on the steel shotcrete of subway station lower part, can gather the stress and the meeting an emergency of steel shotcrete through grating fiber sensor in real time, and then obtain the stress strain of side wall, realized the real-time supervision to subway station underground side wall.
Drawings
Fig. 1 is a cross-sectional view of a subway station having a grating optical fiber monitoring system supported by the lower portion of the station in the construction process of the subway station disclosed by the utility model;
fig. 2 is a front view of a steel support of a grating optical fiber monitoring system of a station lower support in the construction process of a subway station, which is disclosed by the utility model;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 5 is a block diagram of the present invention with a maintenance door structure;
fig. 6 is a structural diagram of the monitoring device of the present invention.
In the figure: 1. the optical fiber grating sensor comprises an optical fiber grating sensor body, 2, an optical fiber grating protection film, 3, an optical fiber grating protection shell body, 30, a maintenance opening, 4, a foam filling layer, 5, a monitoring device, 50, a signal converter, 51, a GPRS module, 52, a power supply, 53, a signal cable, 6, a protection shell body reinforcing device, 60, a fastening belt, 61, a bolt fixing portion, 7, a maintenance door, 70, a sealing rubber strip, 80, a steel support, 81, a side wall, 82 and waterproof glue.
Detailed Description
Fig. 1, fig. 2 and fig. 3 show a grating optical fiber monitoring system for a station lower support in a subway station construction process, which comprises a grating optical fiber sensor 1 adhered to the top of the outer wall of a steel support 80 along the axial direction thereof;
the grating optical fiber protection film 2 is bonded on the top of the outer wall of the steel support 80 and covers the grating optical fiber sensor 1;
the grating optical fiber protection shell 3 is buckled on the grating optical fiber sensor 1 and is bonded on the outer wall of the steel support 80 through waterproof glue 82;
the foam filling layer 4 is arranged on the inner side wall of the grating optical fiber protection shell 3; and the monitoring device 5 is arranged at one end of the grating optical fiber sensor 1 and connected with the grating optical fiber sensor 1.
Specifically, as shown in fig. 1, a plurality of steel supports 80 are arranged between two side walls 81 at the lower part of the subway station for relieving the pressure and deformation of the side walls caused by the surrounding rocks of the lower foundation pit, in the utility model, the outer wall surface of the steel support is coated with a base glue, the grating optical fiber sensor is bonded on the outer wall surface of the steel support through the base glue, and the upper part of the grating optical fiber sensor is bonded with a grating optical fiber protection film 2 made of polyethylene material through the glue, so that the protection film can be prevented from being damaged due to bending and other reasons; simultaneously, still be fixed with grating fiber protection casing 3 through waterproof glue 82 in the grating fiber sensor outside and be used for playing the guard action to grating fiber sensor in subway station work progress, probably have groundwater, material such as stone and earth fall on the steel support, through setting up grating fiber protection casing, can play waterproof and prevent falling of stone and the destruction to grating fiber sensor, furthermore, be equipped with the foam filling layer on the grating fiber protection casing inner wall, when the rubble falls on grating fiber protection casing, absorb and cushion the vibration that produces between rubble and the grating fiber protection casing, and then play the protection to grating fiber sensor. The grating optical fiber sensor is arranged on the surface of the outer wall of the steel support, the stress and the strain of the steel support can be detected in real time, the stress and the strain of the side wall are further obtained, data collected through the grating optical fiber sensor are transmitted to the monitoring device 5 through the signal cable 53, as shown in fig. 6, the monitoring device 5 comprises a signal converter 50, a power supply 52 and a GPRS module, the signal converter is used for converting optical fiber signals into GPRS signals, the GPRS module uploads the GPRS signals to the cloud server, the monitoring device is of the existing structure, and the specific structure and the working principle of the monitoring device are not described in detail here.
Further, as shown in fig. 4, the optical fiber protection device further includes a plurality of groups of protection housing reinforcing devices 6 arranged along the axial direction of the steel support 80, each protection housing reinforcing device 6 includes two fastening belts 60 arranged oppositely on two sides of the optical fiber protection housing, one end of each fastening belt 60 is fixed on the outer side wall of the optical fiber protection housing 3, in this embodiment, each fastening belt 60 is welded on the outer side wall of the optical fiber protection housing 3, the other end of each fastening belt is provided with a bolt fixing portion 61, each bolt fixing portion is provided with a through hole, each fastening belt is an arc-shaped plate structure capable of being attached to the outer wall of the steel support, and the two fastening belts 60 are buckled on the outer wall of the steel support 80 and are fastened and connected through bolts 83. The grating optical fiber protection shell is provided with the fastening belt, so that the grating optical fiber protection shell can be further fixed on the steel support through the fastening belt, and the damage of the grating optical fiber sensor caused by the fact that the grating optical fiber protection shell falls off under the impact action is avoided.
Further, still include a plurality of maintenance doors 7, a plurality of maintenance doors 7 are followed steel shotcrete's axial direction sets up on the last lateral wall of grating fiber protection casing 3, be equipped with maintenance mouth 30 with the position department that is equipped with the maintenance door on the last lateral wall of grating fiber protection casing, maintain the knocker on maintenance mouth, be provided with the maintenance door and can conveniently maintain and maintain grating fiber sensor.
Further, a sealing rubber strip 70 is further arranged between the maintenance door 7 and the upper side wall of the grating optical fiber protection shell and used for sealing the maintenance door, so that the grating optical fiber sensor is protected.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a grating fiber monitoring system that station lower part supported in subway station work progress which characterized in that: the grating optical fiber sensor is adhered to the top of the outer wall of the steel support along the axial direction of the outer wall;
the grating optical fiber protection adhesive film is bonded on the outer wall of the steel support and covers the grating optical fiber sensor;
the grating optical fiber protection shell is buckled on the grating optical fiber sensor and is bonded on the outer wall of the steel support through waterproof glue;
the foam filling layer is arranged on the inner side wall of the grating optical fiber protection shell; and the monitoring device is arranged at one end of the grating optical fiber sensor and connected with the grating optical fiber sensor.
2. The grating optical fiber monitoring system for the lower support of the station in the subway station construction process as claimed in claim 1, wherein: still include the multiunit protection casing reinforcing apparatus who sets up along steel shotcrete axial direction, protection casing reinforcing apparatus includes that two are relative to be set up the fastening area of grating optic fibre protection casing both sides, fastening area one end is fixed on the lateral wall of grating optic fibre protection casing, the other end is equipped with the bolt fastening portion, two the fastening area is detained on the outer wall of steel shotcrete and through bolt fastening connection.
3. The grating optical fiber monitoring system for the lower support of the station in the subway station construction process as claimed in claim 2, wherein: the grating optical fiber protection shell further comprises a plurality of maintenance doors, and the maintenance doors are arranged on the upper side wall of the grating optical fiber protection shell along the axial direction of the steel support.
4. The optical fiber grating monitoring system for the lower support of the station in the subway station construction process as claimed in claim 3, wherein: and a sealing rubber strip is also arranged between the maintenance door and the upper side wall of the grating optical fiber protection shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022485416.0U CN213743527U (en) | 2020-10-30 | 2020-10-30 | Optical fiber grating monitoring system for lower support of station in subway station construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022485416.0U CN213743527U (en) | 2020-10-30 | 2020-10-30 | Optical fiber grating monitoring system for lower support of station in subway station construction process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213743527U true CN213743527U (en) | 2021-07-20 |
Family
ID=76818487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022485416.0U Expired - Fee Related CN213743527U (en) | 2020-10-30 | 2020-10-30 | Optical fiber grating monitoring system for lower support of station in subway station construction process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213743527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116007525A (en) * | 2023-03-24 | 2023-04-25 | 石家庄宜中机电技术有限公司 | On-line monitoring device for dense grating of deformation of coal mine shaft wall |
-
2020
- 2020-10-30 CN CN202022485416.0U patent/CN213743527U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116007525A (en) * | 2023-03-24 | 2023-04-25 | 石家庄宜中机电技术有限公司 | On-line monitoring device for dense grating of deformation of coal mine shaft wall |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210720 |