CN112647547A - Method for monitoring multiple fields of deep underground foundation pit - Google Patents
Method for monitoring multiple fields of deep underground foundation pit Download PDFInfo
- Publication number
- CN112647547A CN112647547A CN202110001586.3A CN202110001586A CN112647547A CN 112647547 A CN112647547 A CN 112647547A CN 202110001586 A CN202110001586 A CN 202110001586A CN 112647547 A CN112647547 A CN 112647547A
- Authority
- CN
- China
- Prior art keywords
- temperature
- humidity
- field
- optical fiber
- sensing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention discloses a method for monitoring multiple fields of a deep underground foundation pit, which can ensure that the temperature and humidity information of each position in the foundation pit can be recorded by monitoring a temperature field, a humidity field and a stress field among support piles and carrying out finite element analysis, the curtain shielding effect among the support piles is reflected by the position information of a plurality of sensing nodes, namely the stress field is reflected, the leakage condition and the temperature condition of the deep underground space can be reflected by the temperature and humidity information of a plurality of sensing nodes, namely, the curtain shielding effect, the heat island effect and other conditions in the underground space are comprehensively analyzed according to the finite element analysis aiming at the conditions, and the potential risk in the next construction or the constructed engineering can be more accurately predicted and evaluated.
Description
Technical Field
The invention belongs to the technical field of multi-field monitoring in underground space construction, and particularly relates to a multi-field monitoring method for a deep underground foundation pit.
Background
The deep underground space has the characteristics of large embedding depth, large water and soil pressure, large development difficulty and the like, but also has the advantages of easy realization of reasonable engineering planning and contribution to the linearization of urban linear space. Therefore, with the development of the building industry, the utilization of underground space presents a vigorous development trend, the quantity of projects such as urban underground squares and the like is more and more, and the underground construction quantity is also larger and more accordingly.
In the process of constructing a deep underground space, monitoring the displacement or stress response of an underground structure, such as foundation pit deformation uplift, support system deformation and the like; in the prior art, finite element analysis is generally implemented by periodically measuring stress or deformation in the field to evaluate deformation or stress response rules. However, the deformation rule cannot be completely reflected by adopting a field periodic measurement mode, comprehensive analysis on the conditions of curtain shielding effect, heat island effect and the like in the underground environment is lacked, and the potential risk in the construction process cannot be accurately predicted and evaluated.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the deep underground foundation pit multi-field monitoring method can realize monitoring of deep underground space under the multi-field coupling action of a stress field, a seepage field, a temperature field and the like.
The technical scheme adopted by the invention is as follows:
a method of monitoring multiple fields for a deep underground excavation, the method comprising the steps of:
s1: and monitoring a temperature field, a humidity field and a stress field among all the support piles.
S2: finite element analysis was performed based on the temperature field, humidity field, and stress field monitored in S1.
According to the monitoring method for the multiple fields of the deep underground foundation pit, the temperature field, the humidity field and the stress field among all supporting piles are monitored, finite element analysis is carried out, the temperature and the humidity information of all positions in the foundation pit can be guaranteed to be recorded, the curtain shielding effect among the supporting piles is reflected through the position information of a plurality of sensing nodes, the stress field is reflected, the temperature and humidity information of the sensing nodes can reflect the leakage condition and the temperature condition of the deep underground space, namely, according to the finite element analysis aiming at the conditions, comprehensive analysis is further carried out on the conditions of the curtain shielding effect, the heat island effect and the like in the underground space, and the potential risks in the next step of construction or constructed engineering are more accurately predicted and evaluated.
Preferably, the stress field is obtained by recording and analyzing position information of each sensing node, and the temperature field and the humidity field are obtained by recording and analyzing temperature and humidity information of each temperature and humidity optical fiber sensor.
The invention also discloses a multi-field monitoring device for the deep underground foundation pit, which comprises a plurality of support piles and a monitoring device, wherein the support piles are arranged in the foundation pit, the monitoring device comprises a plurality of temperature and humidity optical fiber sensors, a plurality of optical couplers, a first optical circulator, a second optical circulator, a laser generator, an optical detector and a processor, the first optical circulator and the second optical circulator are respectively provided with a first port, a second port and a third port, the laser generator sends out two beams of laser which are respectively connected with the first ports of the first optical circulator and the second optical circulator, the second ports of the first optical circulator and the second optical circulator are connected with the optical couplers, the third ports of the first optical circulator and the second optical circulator are connected with the optical detector, the optical detector is connected with the processor, the optical couplers are respectively connected with the temperature and humidity optical fiber sensors, a plurality of said optical couplers are connected.
Preferably, the temperature and humidity optical fiber sensors are uniformly arranged along the depth direction of the support piles. Humiture optical fiber sensor along fender pile degree of depth direction evenly arranged can monitor each degree of depth position in the foundation ditch to guarantee to cover more positions in the foundation ditch, further ensure monitoring data's comprehensiveness and accuracy.
Preferably, the temperature and humidity optical fiber sensor comprises a plurality of sensing nodes, each sensing node comprises a first sensing optical fiber and a second sensing optical fiber which are wrapped together, and the first sensing optical fiber and the second sensing optical fiber are wound at the sensing node for a plurality of turns. The first sensing optical fiber and the second sensing optical fiber are wound for a plurality of circles at the sensing node, so that a certain margin is reserved in the length of the first sensing optical fiber and the second sensing optical fiber, and the first sensing optical fiber and the second sensing optical fiber are extended when the first sensing optical fiber and the second sensing optical fiber are displaced in the foundation pit, so that the first sensing optical fiber and the second sensing optical fiber are prevented from being broken or damaged.
Preferably, the optical coupler transmits the laser beams in the first optical circulator and the second optical circulator to the first sensing optical fiber and the second sensing optical fiber respectively.
After adopting the structure, compared with the prior art, the multi-field monitoring device for the deep underground foundation pit has the following advantages: firstly, a laser generator generates a laser signal, the laser signal is transmitted to an optical circulator, the laser signal is transmitted to an optical coupler under the transmission action of the optical circulator, and transmits the laser signal to the temperature and humidity optical fiber sensor through the optical coupler, the feedback signal of the temperature and humidity optical fiber sensor returns to the optical circulator through the optical coupler, the data is transmitted to a light detector for photoelectric conversion after passing through the circulator, and the electrical data is transmitted to a processor for processing through the light detector, the arrangement can quickly and effectively transmit the temperature and humidity signals in the foundation pit to the processor for monitoring and analysis, secondly, a plurality of optical couplers are connected in parallel, and each optical coupler is connected with a temperature and humidity optical fiber sensor, therefore, the temperature and humidity of a plurality of positions in the foundation pit can be monitored, and the comprehensiveness and accuracy of monitoring data are guaranteed.
Preferably, the first sensing optical fiber and the second sensing optical fiber comprise bare parts capable of being coated with sensitive materials, the temperature sensitive materials are coated on the bare parts of the first sensing optical fiber, and the humidity sensitive materials are coated on the bare parts of the second sensing optical fiber. The first sensing optical fiber is provided with the bare leakage and coated with the temperature sensitive material, so that the first sensing optical fiber can monitor the temperature, and the second sensing optical fiber is provided with the bare leakage and coated with the humidity sensitive material, so that the second sensing optical fiber can monitor the humidity.
Preferably, the sensing node comprises a housing, an optical fiber inlet and an optical fiber outlet are arranged on the housing, a rolling rod fixed on the housing is arranged in the housing, the rolling rod is used for winding the first sensing optical fiber and the second sensing optical fiber, an opening is further formed in the housing, and the opening is used for the first sensing optical fiber and the second sensing optical fiber to sense ambient temperature and humidity information.
Preferably, an anti-corrosion metal coil is wound around the outer side of the case. The anti-corrosion metal coil is wound on the outer side of the shell, so that the sensing node can be prevented from being damaged due to moisture in soil or other corrosive materials in a foundation pit, and the service life of the sensing node is ensured.
Preferably, the system further comprises a ground penetrating radar and an upper computer, wherein the ground penetrating radar is connected with the upper computer, and the processor is connected with the upper computer. The ground penetrating radar is used for detecting the position of the anti-corrosion metal coil on the sensing node and measuring the relative position of the metal coil in the metal sensing nodes according to the measuring position and the horizontal relative position.
Drawings
Fig. 1 is a schematic view of a deep underground pit multi-field monitoring device of the present invention.
Fig. 2 is a schematic layout structure of a deep underground foundation pit multi-field monitoring device of the invention.
Fig. 3 is a partially enlarged view of the region "a" in fig. 2.
FIG. 4 is a schematic diagram of a cross-sectional structure of a sensing node of the multi-field monitoring device for a deep underground foundation pit according to the present invention.
Wherein, 1, supporting piles; 2. A temperature and humidity optical fiber sensor; 3. An optical coupler; 4. An optical circulator; 4.1, a first port; 4.2, a second port; 4.3, a third port; 5. A laser generator; 6. A light detector; 7. A processor; 8. A sensing node; 8.1, a first sensing optical fiber; 8.2, a second sensing optical fiber; 8.3, a bare leakage part; 8.4, a shell; 8.5, a rolling rod; 8.6, corrosion-resistant metal coil.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
1-4, a multi-field monitoring method for a deep underground pit, the monitoring method comprising the steps of:
s1: and monitoring a temperature field, a humidity field and a stress field among all the support piles.
S2: finite element analysis was performed based on the temperature field, humidity field, and stress field monitored in S1.
According to the monitoring method for the multiple fields of the deep underground foundation pit, the temperature field, the humidity field and the stress field among all supporting piles are monitored, finite element analysis is carried out, the temperature and the humidity information of all positions in the foundation pit can be guaranteed to be recorded, the curtain shielding effect among the supporting piles is reflected through the position information of a plurality of sensing nodes, the stress field is reflected, the temperature and humidity information of the sensing nodes can reflect the leakage condition and the temperature condition of the deep underground space, namely, according to the finite element analysis aiming at the conditions, comprehensive analysis is further carried out on the conditions of the curtain shielding effect, the heat island effect and the like in the underground space, and the potential risks in the next step of construction or constructed engineering are more accurately predicted and evaluated.
The stress field is obtained by recording and analyzing the position information of each sensing node, and the temperature field and the humidity field are obtained by recording and analyzing the temperature and humidity information of each temperature and humidity optical fiber sensor.
The invention also provides a multi-field monitoring device for a deep underground foundation pit, which comprises a monitoring device and a plurality of support piles 1, wherein the support piles 1 are fixedly arranged in the foundation pit and used for supporting the foundation pit and bearing horizontal map pressure or landslide thrust in the foundation pit to ensure the stability of the foundation pit, the monitoring device comprises a plurality of temperature and humidity optical fiber sensors 2, a plurality of optical couplers 3, an optical circulator 4, a laser generator 5, an optical detector 6 and a processor 7, in the embodiment, the number of the optical circulators 4 is two, the optical circulators are respectively a first optical circulator and a second optical circulator, the first optical circulator and the second optical circulator are respectively provided with three ports which are respectively a first port 4.1, a second port 4.2 and a third port 4.3, the first port 4.1, the second port 4.2 and the second port 4.3 are sequentially connected, the first port 4.1 of the three optical circulators 4 is connected with the laser 5, the second port 4.2 of the optical circulator 4 is connected with the optical coupler 3, the third port 4.3 of the optical circulator 4 is connected to the optical detector 6, so that light generated by the laser generator 5 can enter from the first port 4.1, and exit from the second port 4.2 and enter the optical coupler 3, wherein a plurality of optical couplers 3 are connected with each other, each optical coupler 3 is respectively connected with one temperature and humidity optical fiber sensor 2, signals are transmitted to the temperature and humidity optical fiber sensors 2 through the optical couplers 3, the temperature and humidity optical fiber sensor 2 feeds back according to the monitored temperature and humidity, the laser fed back by the temperature and humidity optical fiber sensor 2 returns to the optical coupler 3 again, the light input from the second port 4.2 can leave from the third port 4.3, the optical signal received by the optical detector 6 is further received by the optical detector 6, the optical detector 6 is connected with the processor 7, and the optical signal received by the optical detector 6 is analyzed and recorded through the processor 7; according to the attached fig. 1 of the specification, in the present embodiment, only three optical couplers 3 and temperature/humidity optical fiber sensors 2 are shown, and in an actual monitoring process, the number of the optical couplers 3 and the temperature/humidity optical fiber sensors 2 may be much larger than that in the present embodiment.
The temperature and humidity optical fiber sensors 2 are uniformly arranged along the depth direction of the support piles 1 so as to ensure that temperature and humidity monitoring is carried out on foundation pits at various depths; the temperature and humidity optical fiber sensor 2 comprises a plurality of sensing nodes 8, each sensing node 8 comprises a shell 8.4, a first sensing optical fiber 8.1 and a second sensing optical fiber 8.2 which are wrapped together, an optical fiber inlet and an optical fiber outlet are formed in the shell 8.4, a rolling rod 8.5 is further arranged in the shell 8.4, and the first sensing optical fiber 8.1 and the second sensing optical fiber 8.2 are wound on the rolling rod 8.5 for a plurality of circles so as to ensure that the first sensing optical fiber 8.1 and the second sensing optical fiber 8.2 can be stretched when a foundation pit is displaced and prevent the first sensing optical fiber 8.1 and the second sensing optical fiber 8.2 from being damaged or broken; the first sensing optical fiber 8.1 and the second sensing optical fiber 8.2 comprise a bare leakage 8.3 capable of being coated with sensitive materials, wherein the first sensing optical fiber 8.1 is coated with temperature sensitive materials at the bare leakage 8.3 for monitoring temperature, and the second sensing optical fiber 8.2 is coated with humidity sensitive materials at the bare leakage 8.3 for monitoring temperature.
The outer side of the shell 8.4 is also wound with an anti-corrosion metal coil 8.6, the monitoring device further comprises an upper computer and a radar, the upper computer is electrically connected with the radar and the processor 7 and is used for controlling the radar and the processor 7 and displaying signals received by the radar and the processor 7, the radar is used for detecting the position of the anti-corrosion metal coil 8.6 on the sensing nodes 8, so that the position of each sensing node 8 is mastered, the change of the position of each sensing node 8 can be timely found according to the monitoring of the position of each sensing node 8, the curtain shielding effect between the support piles 1 is reflected, namely, the stress field can be reflected, and whether the support of the support piles 1 is safe and effective or not can be known; in this embodiment, the host computer can adopt the computer, receives radar and the signal of treater 7 to carry out finite element analysis and processing, supply the timely condition of mastering in the foundation ditch of staff.
The working principle of the device is that a laser generator 5 emits laser, the laser enters a first port 4.1 of an optical circulator 4 and leaves from a second port 4.2, enters an optical coupler 3 and further enters a temperature and humidity optical fiber sensor 2, the temperature and humidity of each part in a foundation pit are monitored through the temperature and humidity optical fiber sensors 2 arranged at various depths in the foundation pit, monitoring results are fed back to the optical coupler 3, the optical coupler 3 transmits feedback signals back to the second port 4.2, the feedback signals leave the optical circulator 4 from a third port 4.3, are received by an optical detector 6 and are recorded by a processor 7, meanwhile, the radar detects the position of an anti-corrosion metal coil 8.6 wound on a shell 8.4 of the temperature and humidity optical fiber sensor 2, monitors the position of the anti-corrosion metal coil, the radar and the processor 7 transmit the monitored signals to an upper computer for finite element analysis, and the shielding effect between supporting piles 1 is reflected through the position information of a plurality of sensing nodes 8, the stress field is reflected, the temperature and humidity information of the multiple sensing nodes 8 can reflect the leakage condition and the temperature condition of the deep underground space, namely, the conditions such as curtain shielding effect and heat island effect in the underground space are comprehensively analyzed according to finite element analysis aiming at the conditions, and the potential risk in the next construction or the constructed engineering is more accurately predicted and evaluated.
The directional terms used herein are used for the purposes of better and clearer illustration and understanding of the present invention, and are not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operative, and therefore should not be considered as limiting.
The foregoing has described preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and various changes made within the scope of the independent claims of the present invention are within the scope of the present invention.
Claims (6)
1. A monitoring method for multiple fields of a deep underground foundation pit is characterized by comprising the following steps:
s1: monitoring a temperature field, a humidity field and a stress field among all the support piles;
s2: finite element analysis was performed based on the temperature field, humidity field, and stress field monitored in S1.
2. The method according to claim 1, wherein the stress field is obtained by recording and analyzing position information of each sensing node, and the temperature field and the humidity field are obtained by recording and analyzing temperature and humidity information of each temperature and humidity optical fiber sensor.
3. The method for monitoring the multiple fields of the deep underground foundation pit according to the claims 1 and 2, wherein the temperature field, the humidity field and the stress field between the support piles are monitored, finite element analysis is performed to ensure that the temperature and the humidity information of each position in the foundation pit can be recorded, the position information of a plurality of sensing nodes reflects the curtain shielding effect between the support piles, namely the stress field, and the temperature and humidity information of the plurality of sensing nodes can reflect the leakage condition and the temperature condition of the deep underground space.
4. The method as claimed in claim 3, wherein the conditions of curtain effect, heat island effect and the like in the underground space are comprehensively analyzed according to the temperature, humidity information, stress field, leakage condition of the deep underground space and finite element analysis of the temperature condition of each position in the foundation pit, so as to more accurately predict and evaluate the potential risks in the next construction or the constructed engineering.
5. The method for monitoring the multiple fields of the deep underground foundation pit according to claim 1, wherein a plurality of temperature and humidity optical fiber sensors are uniformly arranged along the depth direction of the support piles.
6. The method according to claim 5, wherein the temperature and humidity optical fiber sensor comprises a plurality of sensing nodes, and the sensing nodes comprise a first sensing optical fiber and a second sensing optical fiber which are packaged together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110001586.3A CN112647547A (en) | 2021-01-04 | 2021-01-04 | Method for monitoring multiple fields of deep underground foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110001586.3A CN112647547A (en) | 2021-01-04 | 2021-01-04 | Method for monitoring multiple fields of deep underground foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112647547A true CN112647547A (en) | 2021-04-13 |
Family
ID=75367230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110001586.3A Withdrawn CN112647547A (en) | 2021-01-04 | 2021-01-04 | Method for monitoring multiple fields of deep underground foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112647547A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1774278A2 (en) * | 2004-07-23 | 2007-04-18 | Smart Structures, Inc. | Monitoring system for concrete pilings and method of installation |
| RU2378457C1 (en) * | 2008-11-19 | 2010-01-10 | Институт Механики Сплошных Сред Уральского Отделения Российской Академии Наук | Method for monitoring of building under action of disturbances from displacement of its foundation |
| CN205000373U (en) * | 2015-10-10 | 2016-01-27 | 中铁建大桥工程局集团第一工程有限公司 | Many metamessages of foundation ditch monitoring devices |
| CN109813275A (en) * | 2019-01-30 | 2019-05-28 | 广州轨道交通建设监理有限公司 | A kind of deep basal pit monitoring system and monitoring method |
| CN111705856A (en) * | 2020-08-20 | 2020-09-25 | 北京大成国测科技有限公司 | Numerical analysis-based foundation pit settlement monitoring system and prediction method |
-
2021
- 2021-01-04 CN CN202110001586.3A patent/CN112647547A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1774278A2 (en) * | 2004-07-23 | 2007-04-18 | Smart Structures, Inc. | Monitoring system for concrete pilings and method of installation |
| RU2378457C1 (en) * | 2008-11-19 | 2010-01-10 | Институт Механики Сплошных Сред Уральского Отделения Российской Академии Наук | Method for monitoring of building under action of disturbances from displacement of its foundation |
| CN205000373U (en) * | 2015-10-10 | 2016-01-27 | 中铁建大桥工程局集团第一工程有限公司 | Many metamessages of foundation ditch monitoring devices |
| CN109813275A (en) * | 2019-01-30 | 2019-05-28 | 广州轨道交通建设监理有限公司 | A kind of deep basal pit monitoring system and monitoring method |
| CN111705856A (en) * | 2020-08-20 | 2020-09-25 | 北京大成国测科技有限公司 | Numerical analysis-based foundation pit settlement monitoring system and prediction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108918405B (en) | Online monitoring system and method for corrosion prevention effect of oil well pipeline | |
| Inaudi et al. | Long-range pipeline monitoring by distributed fiber optic sensing | |
| Okamoto Jr et al. | Autonomous system for oil pipelines inspection | |
| CN112857438A (en) | Multi-field monitoring device for deep underground foundation pit | |
| CN109140250B (en) | Gas-liquid transport pipeline leakage point on-line monitoring system based on distributed optical fiber sensing | |
| US20110311179A1 (en) | Compartmentalized fiber optic distributed sensor | |
| US11519894B2 (en) | Optical monitoring to detect corrosion of power grid components | |
| CN206093530U (en) | Armor optic fibre inlays formula of burying pipeline leakage detection structure | |
| JP4425845B2 (en) | Artificial barrier environment monitoring device | |
| CN206234623U (en) | A kind of armored fiber optic peripheral hardware formula pipeline leakage testing structure | |
| JP2006258613A (en) | Displacement measurement and displacement detection system utilizing laser light and optical sensor | |
| Ibrahim et al. | Application of fiber optics in water distribution networks for leak detection and localization: a mixed methodology-based review | |
| CN112647547A (en) | Method for monitoring multiple fields of deep underground foundation pit | |
| Cheng et al. | Experimental verification research of pipeline deflection deformation monitoring method based on distributed optical fiber measured strain | |
| WO2020003023A1 (en) | A method for monitoring a continuous pipeline, monitoring device and assembly comprising said device | |
| EP1496352B1 (en) | Method and apparatus for temperature monitoring of a physical structure | |
| CN204286374U (en) | A kind of hydro-structure distortion distributed optical fiber sensing device | |
| Zhang et al. | Application of fiber Bragg grating sensor technology to leak detection and monitoring in diaphragm wall joints: a field study | |
| Zheng et al. | Investigation of a quasi-distributed displacement sensor using the macro-bending loss of an optical fiber | |
| CN114005558B (en) | FBG real-time leakage monitoring method and system for main steam pipeline of nuclear power station | |
| Inaudi et al. | Distributed fiber-optic sensing for long-range monitoring of pipelines | |
| CN114563040A (en) | Hydropower station hydraulic tunnel monitoring system and working method thereof | |
| Loupos et al. | Fiber sensors based system for tunnel linings’ structural health monitoring | |
| Aljaroudi et al. | Probability of detection and false detection for subsea leak detection systems: model and analysis | |
| CN102062730A (en) | Buried oil pipeline external-corrosion real-time monitoring device based on optical fiber sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210413 |
|
| WW01 | Invention patent application withdrawn after publication |