CN113899343B - Foundation settlement monitoring system and method based on distributed optical fiber strain sensing technology - Google Patents
Foundation settlement monitoring system and method based on distributed optical fiber strain sensing technology Download PDFInfo
- Publication number
- CN113899343B CN113899343B CN202111494842.3A CN202111494842A CN113899343B CN 113899343 B CN113899343 B CN 113899343B CN 202111494842 A CN202111494842 A CN 202111494842A CN 113899343 B CN113899343 B CN 113899343B
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- foundation
- fiber strain
- foundation settlement
- sensor
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Radar, Positioning & Navigation (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a foundation settlement monitoring system and method based on a distributed optical fiber strain sensing technology, which comprises the steps of firstly estimating the foundation settlement influence range of a region to be monitored through geological data, and then drilling inclined holes in the region to be monitored; implanting an optical fiber strain sensor and an optical fiber temperature sensor in the inclined hole, and then filling filler in the drill hole to ensure that the optical fiber and a surrounding medium are deformed in a coordinated manner; connecting the optical fiber sensor to a distributed optical fiber strain acquisition instrument, building a foundation settlement monitoring system, determining a sampling rate, acquiring initial data, and correcting the implantation length of the optical fiber sensor; collecting data according to monitoring frequency by using the same parameters as the initial collected data; and finally, calculating the foundation settlement according to a conversion relation between the foundation settlement and the strain. The invention has the advantages of simple structure, easy construction, convenient use, good stability and strong practicability. And reliable and rich data are provided for foundation deformation settlement evaluation and foundation deformation mechanism research.
Description
Technical Field
The invention belongs to the field of engineering construction, relates to a foundation settlement monitoring technology, and particularly relates to a foundation settlement monitoring system and method based on a distributed optical fiber strain sensing technology. The method is used for solving the problems that after the treatment of a large-area foundation or when the foundation of the existing building is settled, a foundation settlement point type monitoring instrument is difficult to install, monitoring points are insufficient, the monitoring efficiency is low and the like; the monitoring system can improve the number of monitoring points and the data acquisition frequency, and can realize remote real-time monitoring and easy construction.
Background
The foundation settlement refers to the foundation surface subsidence caused by compaction of a foundation soil layer under the action of additional stress. Excessive settlement can cause the building to tilt and crack so that it cannot be used properly. The factors of settlement are many, and the foundation settlement may be caused by compression deformation of the pores of the soil layer from the internal cause, so as to cause deformation in the vertical direction. In terms of external reasons, the foundation may generate additional stress under the action of external load, so that the original stress of the land is changed. The foundation deformation monitoring is an important means for acquiring the foundation health condition of a building (structure), and is an important component for monitoring the whole life cycle of the engineering building. The foundation settlement monitoring is one of the core contents of foundation deformation monitoring, and is a main means for investigating the deformation change characteristics of foundation rock and soil bodies under the action of self gravity, foundation load and external factors of a foundation. The monitoring of the foundation settlement is an important process for analyzing the deformation horizon and the deformation mechanism of the foundation, and has a key effect on the observation and research of the foundation settlement deformation.
The foundation settlement monitoring mainly uses a layered settlement meter at present, and the method comprises the steps of pre-burying a conduit in the foundation construction process or drilling in the foundation to a preset depth by using a drilling machine; bundling the supporting legs of the layered settlement meter by using a dissolvable rope, and putting the supporting legs into a guide pipe or a drill hole according to the design requirement; injecting water to dissolve the rope so as to fix the support leg of the settlement gauge on the foundation; calibrating the height of the orifice, and backfilling the guide pipe or the drilled hole with clean fine sand; and obtaining deformation information of the settlement gauge in the vertical direction to obtain the settlement amount of the rock and soil mass at different depth positions of the foundation. The layered settlement meter monitors a plurality of selected point positions, belongs to point monitoring, is discontinuous in space, and cannot acquire continuous settlement observation data on a plane. After foundation treatment construction is completed, or foundation settlement observation of an existing building or ground settlement observation is difficult to implement, cannot be remotely observed, and cannot be continuously observed in time, related personnel provide a foundation settlement observation system based on an optical fiber technology, wherein foundation settlement monitoring based on an optical fiber grating sensing technology is the same as that of a traditional monitoring method, point-type monitoring is achieved, the survival rate of the optical fiber grating implanted into the foundation is low, and the unit price of a sensor is high; at present, foundation settlement observation based on a distributed optical fiber strain sensing technology is to implant an optical fiber into a vertical borehole and evaluate the foundation settlement by using the obtained strain. The distributed optical fiber strain sensing mainly tests the tensile strain of an optical fiber, and the optical fiber is vertically implanted to cause the optical fiber to be mainly stressed, so that the provided foundation settlement calculation model is not rigorous, and the existing construction method is complex. Therefore, in consideration of the characteristics and advantages of the optical fiber, in combination with the characteristic of foundation settlement, a better foundation settlement observation system based on the distributed optical fiber strain sensing technology is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a monitoring system which is simple in construction process, clear in parameters of a foundation settlement model and indirectly improved in monitoring range and is suitable for long-term online observation of foundation settlement, aiming at the needs of monitoring foundation settlement deformation and the problems existing in monitoring foundation settlement by applying a distributed optical fiber strain sensing technology at present.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides a foundation settlement monitoring system based on a distributed optical fiber strain sensing technology, which is characterized in that: locate the optic fibre strain sensor in the ground and the distributed optical fibre that links to each other with optic fibre strain sensor including the slope and meet an emergency the collection appearance, through the strain on the optic fibre strain sensor that distributed optical fibre strain collection appearance collection slope set up, subside and the foundation settlement is calculated through the foundation settlement and the conversion relational expression between meeting an emergency, the formula is as follows:
(j) represents the foundation settlement after the jth measurement; l represents the total length of the fiber strain sensor; c represents the sampling interval of the optical fiber strain sensor;
the relative strain of the ith section of optical fiber on the optical fiber strain sensor at the j measurement time is shown; the table shows the tilt angle θ of the fiber implantation.
Further, the foundation settlement monitoring system also comprises an optical fiber temperature sensor for temperature compensation, the optical fiber temperature sensor and the optical fiber strain sensor are arranged in the foundation together and are connected into the distributed optical fiber strain acquisition instrument together, and the optical fiber temperature sensor and the optical fiber strain sensor are connected into the distributed optical fiber strain acquisition instrument together
The j-th measurement is shown, and the relative strain of the ith section of the optical fiber on the optical fiber strain sensor is considered by the temperature influence.
Further, the optical fiber strain sensor is implanted into the foundation through drilling or directly obliquely driven into the foundation attached to the structure.
Further, when the optical fiber strain sensor is implanted through a drill hole, the drill hole around the optical fiber strain sensor is filled with grout or particle fillers.
Further, the inclination angle theta of the optical fiber strain sensor ranges from 30 degrees to 85 degrees. Further, the inclination angle theta of the optical fiber strain sensor ranges from 45 degrees to 80 degrees.
Further, the implantation depth range of the optical fiber strain sensor is below the sedimentation influence depth stratum of the foundation.
The invention also provides a foundation settlement monitoring method based on the foundation settlement monitoring system, which is characterized by comprising the following steps:
the method comprises the following steps of firstly, estimating the influence range of foundation settlement in a region to be monitored, including the influence range in the horizontal direction and the influence depth, through geological data;
determining inclined drilling parameters according to the possible settlement amount and site construction conditions, and drilling inclined holes;
implanting an optical fiber strain sensor and an optical fiber temperature sensor into the inclined hole, placing the optical fiber attached to the structural body into the drilled hole to a certain depth, and extracting the structural body;
filling filler into the drill hole, wherein the filler is liquid to be solidified or particle material convenient to fill, and the property of the filler is close to that of a surrounding rock-soil medium after the filler is stabilized, so that the optical fiber and the surrounding medium are ensured to be deformed in a coordinated manner;
connecting the optical fiber strain sensor and the optical fiber temperature sensor to a distributed optical fiber strain acquisition instrument, building a good basis settlement monitoring system, determining a sampling rate, acquiring initial data, and correcting the implantation length of the optical fiber sensor; collecting data according to monitoring frequency by using the same parameters as the initial collected data;
and step six, calculating foundation settlement S (j) after the jth measurement according to a sectional strain calculation formula.
Further, the filler is mud or fine sand.
Furthermore, the foundation settlement monitoring system further comprises an industrial personal computer, wherein a conversion relation between foundation settlement and strain is used as a calculation model and is arranged in the industrial personal computer, and the industrial personal computer automatically calculates settlement according to data acquired by the distributed optical fiber strain acquisition instrument.
The invention has the beneficial effects that:
the invention provides a monitoring system and a monitoring method which are simple to implement and definite in parameters of a foundation settlement calculation model for foundation settlement observation based on a distributed optical fiber strain sensing technology, and the technology can fully utilize the advantages of the distributed optical fiber sensing technology and provide reliable and rich data for foundation deformation settlement evaluation and foundation deformation mechanism research.
Drawings
FIG. 1 is a schematic cross-sectional view of a ground settlement monitoring system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of an embodiment of the present invention.
FIG. 3 is a schematic view of the optical fiber implanted into the ground in the embodiment of the present invention.
FIG. 4 is a schematic diagram of borehole backfill in an embodiment of the present invention.
FIG. 5 is a diagram illustrating the effect of the construction completion of the foundation settlement monitoring system according to the embodiment of the present invention.
FIG. 6 is a graph of force calculation parameters of an optical fiber strain sensor of the ground-based settlement monitoring system according to the embodiment of the invention.
FIG. 7 is a diagram of the displacement of an optical fiber strain sensor.
Sedimentation affects the depth formation; 2-formation below the sedimentation impact range; 3-an optical fiber strain sensor; 4-a filler; 5-a transmission fiber; 6-distributed optical fiber strain acquisition instrument; 7-inclined drilling; 8-a drilling machine; 9-the deformed fiber; 10-ground before settlement; 11-ground at a certain moment during the settling period, 12-industrial personal computer.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The invention is illustrated below with reference to the accompanying drawings, as shown in figures 1 to 7:
the utility model provides a ground settlement monitoring system based on distributed optical fiber strain sensing technology, includes that the slope locates the interior optic fibre strain sensor 3 of ground and the distributed optical fiber strain acquisition instrument 6 that links to each other with optic fibre strain sensor 3, gathers the slope through distributed optical fiber strain acquisition instrument 6 and sets up the strain on the optic fibre strain sensor 3, subsides through the ground settlement and the conversion relational expression between straining calculates the ground settlement, and the formula is as follows:
s (j) represents the foundation settlement after the jth measurement, L represents the total length of the optical fiber strain sensor 3, C represents the sampling interval of the optical fiber strain sensor 3,
represents the relative strain of the ith segment of optical fiber on the optical fiber strain sensor 3 at the j measurement; the theta table represents the tilt angle of the optical fiber implant, specifically the angle between the optical fiber and the horizontal plane.
As a preferred embodiment, the ground settlement monitoring system further comprises a temperature compensation deviceThe optical fiber temperature sensor and the optical fiber strain sensor 3 are arranged in the foundation together and are connected into the distributed optical fiber strain acquisition instrument 6 together, the temperature is monitored by the optical fiber temperature sensor to carry out temperature compensation on the optical fiber strain sensor 3, correspondingly, the optical fiber temperature sensor and the optical fiber strain sensor 3 are arranged in the foundation together, and the optical fiber temperature sensor and the optical fiber strain sensor are arranged in the foundation together and are connected into the distributed optical fiber strain acquisition instrument 6 together, and the temperature is monitored by the optical fiber temperature sensor to carry out temperature compensation on the optical fiber strain sensor 3 correspondingly
The j-th measurement is shown, and the relative strain of the ith section of the optical fiber on the optical fiber strain sensor is considered by the temperature influence. The optical fiber strain sensor 3 and the optical fiber temperature sensor are collectively referred to as an optical fiber sensor.
In a preferred embodiment, the optical fiber strain sensor 3 is implanted into the ground through drilling or directly obliquely driven into the ground attached to a structure.
In a preferred embodiment, when the optical fiber strain sensor 3 is implanted through a borehole, the borehole around the optical fiber strain sensor 3 is grouted or filled with a granular filler 4.
As a preferred embodiment, the inclination angle θ of the optical fiber strain sensor 3 ranges from 30 to 85 degrees, and may further preferably range from 45 to 80 degrees. The smaller the inclination angle theta is, the higher the settlement monitoring accuracy is, but the larger the floor area is, the larger the inclination angle theta is, the smaller the floor area is, but the settlement monitoring accuracy is not high, so that the 45-80 degrees are comprehensively considered as an optimal range.
As a preferred embodiment, the implantation depth range of the optical fiber strain sensor 3 is below the sedimentation influence depth stratum 1 of the foundation.
The invention also provides a foundation settlement monitoring method, which comprises the following steps:
the method comprises the following steps of firstly, estimating the influence range of foundation settlement in a region to be monitored, including the influence range in the horizontal direction and the influence depth, through geological data;
step two, as shown in figure 2, determining the parameters of an inclined drilling hole 7 according to the possible settlement and the site construction conditions, and drilling the inclined hole through a drilling machine 8;
step three, as shown in fig. 3, implanting an optical fiber strain sensor 3 and an optical fiber temperature sensor (arranged according to actual requirements) in the inclined drill hole 7, placing the optical fiber attached to the structural body into the inclined drill hole 7 to a certain depth, and extracting the structural body;
step four, as shown in fig. 4, filling materials are filled into the inclined drill holes 7, the filling materials 4 are liquid to be solidified or granular materials convenient to fill, and after the filling materials are stabilized, the properties of the filling materials are close to those of surrounding rock and soil media, so that the optical fibers and the surrounding media are ensured to be deformed in a coordinated manner;
connecting the optical fiber strain sensor 3 to a distributed optical fiber strain acquisition instrument 6 through a transmission optical fiber 5, connecting the distributed optical fiber strain acquisition instrument 6 to an industrial personal computer 12, determining a sampling rate, acquiring initial data and correcting the implantation length of the optical fiber sensor by the constructed foundation settlement monitoring system as shown in figure 5; collecting data according to monitoring frequency by using the same parameters as the initial collected data;
and step six, calculating foundation settlement S (j) after the jth measurement according to a sectional strain calculation formula.
Wherein, C is a sampling interval used when the distributed optical fiber strain acquisition instrument 6 acquires data; l is the length of the implanted optical fiber; as shown in fig. 6 and 7, a plane passing through the optical fiber strain sensor 3 and perpendicular to the ground is used as a coordinate plane, an end point at the deepest position of the optical fiber strain sensor 3 is used as a coordinate origin, the horizontal direction is an X axis, the vertical direction is a Y axis, and xi, j, xi-1, j are coordinates of the midpoint of the ith segment and the previous segment of the optical fiber during the jth measurement; and epsilon (xi, j) is the strain value of the sampling point corresponding to 1-time subtracting the initial acquisition data of the optical fiber and considering the temperature effect when i is taken, x0, j represents a coordinate origin when i =1, and epsilon (x 0, j) correspondingly represents the strain value of the origin minus the initial acquisition data of the optical fiber and considering the temperature effect.
As a preferred embodiment, the filler 4 is mud or fine sand.
As a preferred embodiment, the foundation settlement monitoring system further includes an industrial personal computer 12, the strain calculation formula is built in the industrial personal computer 12 as a calculation model, and the industrial personal computer 12 automatically calculates the settlement amount according to the data acquired by the distributed optical fiber strain acquisition instrument 6.
It should be noted that, in the above embodiments of the present invention, the specific data acquisition of the optical fiber strain sensor adopts the prior art, and the data acquisition of the implanted optical fiber temperature sensor considering the temperature influence also adopts the prior art, for example, the technique disclosed in CN105157999B may be adopted.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A foundation settlement monitoring system based on distributed optical fiber strain sensing technology is characterized in that: locate the optic fibre strain sensor in the ground and the distributed optical fibre that links to each other with optic fibre strain sensor including the slope and meet an emergency the collection appearance, through the strain on the optic fibre strain sensor that distributed optical fibre strain collection appearance collection slope set up, subside and the foundation settlement is calculated through the foundation settlement and the conversion relational expression between meeting an emergency, the formula is as follows:
S（j) Is shown asjThe foundation subsides after the secondary measurement;Lrepresents the total length of the fiber strain sensor;Crepresenting a sampling interval of the optical fiber strain sensor;
is shown asjDuring secondary measurement, the optical fiber strain sensor is arrangediThe relative strain of the length of optical fiber;θindicating angle of inclination of fibre-optic implant, i.e. clamping of fibre-optic strain sensor to horizontalAnd (4) an angle.
2. The foundation settlement monitoring system based on the distributed optical fiber strain sensing technology as claimed in claim 1, wherein: the optical fiber strain acquisition device further comprises an optical fiber temperature sensor for temperature compensation, the optical fiber temperature sensor and the optical fiber strain sensor are arranged in the foundation together and are connected into the distributed optical fiber strain acquisition device together, and the optical fiber temperature sensor and the optical fiber strain sensor are connected into the distributed optical fiber strain acquisition device together
Is shown asjDuring secondary measurement, the optical fiber strain sensor is arrangediThe length of fiber takes into account the relative strain imposed by temperature.
3. The foundation settlement monitoring system based on the distributed optical fiber strain sensing technology as claimed in claim 1 or 2, wherein: the optical fiber strain sensor is implanted into the foundation through drilling or directly obliquely driven into the foundation attached to a structural body.
4. The foundation settlement monitoring system based on the distributed optical fiber strain sensing technology as claimed in claim 3, wherein: when the optical fiber strain sensor is implanted through the drill hole, the drill holes on the periphery of the optical fiber strain sensor are filled with grouting or particle fillers.
5. The foundation settlement monitoring system based on the distributed optical fiber strain sensing technology as claimed in claim 1 or 2, wherein: the inclination angle of the optical fiber strain sensorθThe range is 30-85 degrees.
6. The foundation settlement monitoring system based on the distributed optical fiber strain sensing technology as claimed in claim 4, wherein: the inclination angle of the optical fiber strain sensorθThe range is 45-80 degrees.
7. The foundation settlement monitoring system based on the distributed optical fiber strain sensing technology as claimed in claim 1 or 2, wherein: the implantation depth range of the optical fiber strain sensor is below the depth of the stratum influenced by foundation settlement.
8. A foundation settlement monitoring method based on the foundation settlement monitoring system of claim 1, comprising the steps of:
the method comprises the following steps of firstly, estimating the influence range of foundation settlement in a region to be monitored, including the influence range in the horizontal direction and the influence depth, through geological data;
determining inclined drilling parameters according to the possible settlement amount and site construction conditions, and drilling inclined holes;
implanting an optical fiber strain sensor and an optical fiber temperature sensor into the inclined hole, placing the optical fiber attached to the structural body into the drilled hole to a certain depth, and extracting the structural body;
filling filler into the drill hole, wherein the filler is liquid to be solidified or particle material convenient to fill, and the property of the filler is close to that of a surrounding rock-soil medium after the filler is stabilized, so that the optical fiber and the surrounding medium are ensured to be deformed in a coordinated manner;
connecting the optical fiber strain sensor and the optical fiber temperature sensor to a distributed optical fiber strain acquisition instrument, building a good basis settlement monitoring system, determining a sampling rate, acquiring initial data, and correcting the implantation length of the optical fiber sensor; collecting data according to monitoring frequency by using the same parameters as the initial collected data;
step six, calculating the second step according to the conversion relation between the foundation settlement and the strainjSettlement of foundation after secondary measurementS（j）。
9. The foundation settlement monitoring method according to claim 8, wherein: the filler is mud or fine sand.
10. The foundation settlement monitoring method according to claim 8, wherein: the system is characterized by further comprising an industrial personal computer, wherein a conversion relation between foundation settlement and strain is used as a calculation model and is arranged in the industrial personal computer, and the industrial personal computer automatically calculates settlement according to data acquired by the distributed optical fiber strain acquisition instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111494842.3A CN113899343B (en) | 2021-12-09 | 2021-12-09 | Foundation settlement monitoring system and method based on distributed optical fiber strain sensing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111494842.3A CN113899343B (en) | 2021-12-09 | 2021-12-09 | Foundation settlement monitoring system and method based on distributed optical fiber strain sensing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113899343A CN113899343A (en) | 2022-01-07 |
| CN113899343B true CN113899343B (en) | 2022-02-15 |
Family
ID=79025821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111494842.3A Active CN113899343B (en) | 2021-12-09 | 2021-12-09 | Foundation settlement monitoring system and method based on distributed optical fiber strain sensing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113899343B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413838B (en) * | 2022-01-25 | 2024-06-07 | 中煤航测遥感集团有限公司 | Goaf subsidence area monitoring system, goaf subsidence area monitoring equipment, goaf subsidence area monitoring method and goaf subsidence area monitoring device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202903179U (en) * | 2012-10-10 | 2013-04-24 | 江苏中江物联网科技有限公司 | Structural deflection subsidence monitoring system based on Brillouin distributed optical fiber sensing |
| CN106546182B (en) * | 2016-11-03 | 2019-01-18 | 北京信息科技大学 | A kind of high-temperature resistant optical fiber grating strain transducer of incline structure |
| CN106546218B (en) * | 2016-11-25 | 2019-06-14 | 中交第一公路勘察设计研究院有限公司 | A kind of high mountain permafrost differentiation cloth subgrade settlement monitoring system and method |
| CA3039410A1 (en) * | 2018-04-06 | 2019-10-06 | Weir-Jones Engineering Consultants Ltd. | Systems and methods for monitoring structural integrity of slopes |
| CN210154571U (en) * | 2019-07-08 | 2020-03-17 | 扬州市市政建设处 | Large-range distributed monitoring system for surface settlement |
| CN111141256B (en) * | 2020-01-15 | 2021-09-24 | 中国地质大学（武汉） | Roadbed settlement monitoring device and method based on distributed optical fiber sensing monitoring technology |
| CN111756438A (en) * | 2020-07-14 | 2020-10-09 | 山东舜感光电科技有限公司 | Sedimentation tilt optical fiber real-time monitoring and early warning system |
-
2021
- 2021-12-09 CN CN202111494842.3A patent/CN113899343B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113899343A (en) | 2022-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204514375U (en) | A kind of anchored slope distortion intelligent monitor system | |
| CN106767476B (en) | Slope stability monitoring and landslide early warning forecasting method based on all-fiber sensing network | |
| CN106018755B (en) | A kind of experimental system of large size ground fissure physical model | |
| Zhu et al. | Combined Application of Optical Fibers and CRLD Bolts to Monitor Deformation of a Pit‐in‐Pit Foundation | |
| CN204730824U (en) | A kind of distributed settlement measuring device | |
| CN104614242A (en) | Excavation and surrounding rock stress and strain monitoring model testing device for rock-soil chamber under complicated conditions, and method thereof | |
| CN104988884B (en) | Mounting method of void deformation monitoring device for face plate rock-fill dam | |
| CN113899343B (en) | Foundation settlement monitoring system and method based on distributed optical fiber strain sensing technology | |
| CN111796072A (en) | High and steep slope vibration table test system under rainfall condition and building test method thereof | |
| CN103541339A (en) | Pull rod type testing device and method for unsaturated undisturbed loess slope soil pressure | |
| CN202430702U (en) | Probe based on multifunctional piezocone penetration test | |
| Zhan et al. | Instrumentation of an unsaturated expansive soil slope | |
| CN113513054B (en) | Pile foundation grouting pressure testing device and method based on optical fiber sensing | |
| CN101435208B (en) | Device and method for monitoring uneven settlement of earth slit formation tunnel | |
| CN110130422A (en) | A kind of construction method of unit for single-pile vertical anti-pulling static test equipment | |
| CN113431016A (en) | Soft rock large deformation section tunnel shallow-buried underground surface-penetrating building surface monitoring method | |
| CN102926368B (en) | Device and method for monitoring differential settlement of roadbed of road | |
| CN204556387U (en) | Complex condition Rock And Soil adit digging and surrouding rock stress, strain monitoring model test apparatus | |
| CN208254420U (en) | Using the equipment of distribution type fiber-optic measurement soil deformation | |
| Di et al. | A variational method for calculating the longitudinal deformation of a shield tunnel in soft soil caused by grouting under tunnel | |
| CN207007108U (en) | A kind of long range roadbed continuous modification monitoring device | |
| CN203132748U (en) | Soil internal stress change monitoring system in loess place immersing condition | |
| CN202073083U (en) | Real-time monitoring device for surface displacement of rock soil body | |
| CN204662373U (en) | A deformation monitoring devices that comes to nothing for panel rock-fill dam | |
| CN107860496A (en) | Method for testing shear stress on surface of full-length bonded steel bar anchor rod body |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |