CN113418641B - Road stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology - Google Patents
Road stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology Download PDFInfo
- Publication number
- CN113418641B CN113418641B CN202110628666.1A CN202110628666A CN113418641B CN 113418641 B CN113418641 B CN 113418641B CN 202110628666 A CN202110628666 A CN 202110628666A CN 113418641 B CN113418641 B CN 113418641B
- Authority
- CN
- China
- Prior art keywords
- sensors
- stress
- strain
- road
- 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
- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000835 fiber Substances 0.000 title claims abstract description 24
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 239000010410 layer Substances 0.000 claims abstract description 87
- 239000002344 surface layer Substances 0.000 claims abstract description 19
- 238000004806 packaging method and process Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 230000009471 action Effects 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 15
- 239000002689 soil Substances 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 239000013307 optical fiber Substances 0.000 claims description 13
- 230000006641 stabilisation Effects 0.000 claims description 13
- 238000011105 stabilization Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- KHDSWONFYIAAPE-UHFFFAOYSA-N silicon sulfide Chemical compound S=[Si]=S KHDSWONFYIAAPE-UHFFFAOYSA-N 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 230000008376 long-term health Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010227 cup method (microbiological evaluation) Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
Images
Classifications
-
- 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
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
-
- 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
Abstract
The invention discloses a highway stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology, which comprises the steps of 1) point location arrangement, 2) stress sensor packaging, 3) strain sensor packaging, 4) temperature compensation sensor packaging, 5) sensor laying and 6) data acquisition. The stress sensor, the strain sensor and the temperature compensation sensor are paved in a road base layer, a base layer and a surface layer of a road, so that stress and strain data of different structural layers of the road at different depths can be continuously and accurately measured. The stress and strain information of the experimental road section can be measured continuously, accurately and three-dimensionally in real time.
Description
Technical Field
The invention belongs to the technical field of road monitoring and optical fiber application, and particularly relates to a highway stress and strain comprehensive monitoring method based on an FBG (fiber Bragg Grating) optical fiber grating sensing technology.
Background
The long-term repeated action of the dynamic load of the vehicle can cause the strength fatigue and the deformation damage of the road bed and the road surface of the highway to different degrees. In order to optimize the structural design of the highway, the coupling relation of stress and strain at different depths of the highway is explored under the action of dynamic load, the deformation and damage rule of the highway is disclosed, the highway in the operation period is subjected to real-time and long-term health monitoring, and the stress and strain of the roadbed and the road surface of the highway are comprehensively monitored.
The traditional roadbed monitoring method comprises two types of surface monitoring and internal monitoring. The surface monitoring technology comprises the following steps: a settling plate method, a monitoring pier method, a settling cup method and the like; the roadbed internal monitoring technology comprises: inclinometer methods, steel string profiler methods, and the like. The conventional monitoring methods are mature in technology and wide in application, but most of the conventional monitoring methods adopt point-type monitoring and data acquisition forms, full-section or three-dimensional real-time continuous monitoring cannot be realized, the normal operation of a highway is influenced during the monitoring period of the surface monitoring technology, and particularly, most of the conventional monitoring methods cannot perform real-time, continuous and accurate comprehensive monitoring on the stress and strain of the roadbed of the highway under the action of dynamic load of a vehicle.
The FBG fiber bragg grating realizes the monitoring of a measured object by measuring the drift of the wavelength. In the last 90 s, FBGs were applied abroad to health detection of bridge structures. Because of its outstanding advantages, it is widely used in civil engineering, geotechnical engineering and other fields.
Disclosure of Invention
The invention provides a highway stress and strain comprehensive monitoring method based on an FBG fiber bragg grating sensing technology, and aims to solve the technical problems.
Therefore, the invention adopts the following technical scheme:
a highway stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology comprises the following steps:
1) Point location arrangement: the stress sensor, the strain sensor and the temperature compensation sensor are embedded in a road area where wheels are rolled at high frequency, a plurality of stress sensors, strain sensors and temperature compensation sensors are embedded in the cross section of a road along the vertical direction, the sensors are distributed in a road base layer, a base layer and a surface layer of the road, and the stress sensors, the strain sensors and the temperature compensation sensors are overlaid and laid along the same vertical straight line;
2) And (3) packaging the stress sensor: the stress sensor is an FBG miniature soil pressure meter, the pressure bearing surface of the FBG miniature soil pressure meter is a stainless steel metal diaphragm, a sensing element of the FBG miniature soil pressure meter adopts a short-grid-pitch fiber bragg grating, and the short-grid-pitch fiber bragg grating is fixed at the center of the metal diaphragm through silicon sulfide rubber; the outer layer of the metal diaphragm is provided with an aluminum shell, the short-grating-pitch fiber bragg grating is led out from a side wall hole of the shell, and the FBG miniature soil pressure meters are sequentially connected in series;
3) Packaging a strain sensor: the strain sensors adopt FBG strain sensors, plastic hoses are sleeved on the FBG strain sensors, armor wires are packaged on the outer layers of the plastic hoses, FRP plastic protection pipes are packaged on the outer layers of the armor wires, when the FRP plastic protection pipes are stretched and deformed, the internal short-grid-pitch fiber bragg gratings deform proportionally along with the FRP plastic protection pipes, the FBG strain sensors are connected in series, and the positions of the FBG strain sensors correspond to the positions of the FBG miniature soil pressure meters in the step 2);
4) Packaging a temperature compensation sensor: the temperature compensation sensor is connected to the middle of the FBG strain sensor optical fiber and is packaged by a metal tube;
5) Sensor laying:
a) Paving a road base layer sensor: cutting a groove along the transverse direction of a road on a road base layer, wherein the depth of the groove is not less than 10cm, arranging sensors at the bottom of the groove, arranging a stress sensor at the high-frequency rolling position of wheels of each lane, then laying a strain sensor and a temperature compensation sensor, arranging the strain sensors and the stress sensors correspondingly and horizontally, arranging the temperature compensation sensors at the center of the road, and leading out optical fibers from a road shoulder after the sensors are laid; then, backfilling and compacting roadbed fillers, and arranging, backfilling and compacting a second layer of sensors above the trench backfill layer by the same method, and paving a plurality of layers of sensors in the roadbed layer according to the steps;
b) Laying basic level sensors: when a base layer is laid, a steel plate is fixed right above a groove of the road base layer and used for reserving the groove on the base layer, and a lifting hook used for removing the steel plate is arranged on the steel plate;
firstly, coating lubricating oil on a steel plate, fixing the steel plate by using a small amount of water stabilization layer filler, then paving a water stabilization layer material, embedding the steel plate in the water stabilization layer material, paving an experimental road section by using a paver, compacting a road base by using a road roller to reach the preset height of the water stabilization layer, taking out the steel plate after maintenance is finished, and paving a plurality of layers of sensors in a groove of the base layer according to the method in the step a);
c) Paving a surface layer sensor: prefabricating a groove on the surface layer according to the method in the step b), then paving a plurality of layers of sensors in the prefabricated groove, and finally paving the surface layer;
d) Paving sensors on a plurality of sections of the highway according to the paving steps, wherein the distance between adjacent sections is not less than 60cm;
6) Data acquisition:
connecting the optical fiber led out from the road shoulder to a ZX-FP type demodulator, and starting to acquire data during road operation:
a) Collecting different depths (H) when the vehicle passes i ) Stress value sigma under different dynamic loads ij Drawing a curve of stress variation along the depth direction, coupling to obtain a functional relation between depth and stress under different dynamic loads, and exploring stress distribution and stress transmission conditions of different depths of the road under the dynamic loads;
σ j =f(H)
b) Collecting different depths (H) i ) Strain value epsilon under different dynamic load ij Drawing a change curve of the deformation along the depth direction at the same time, coupling to obtain a function relation between the depth and the strain, and exploring deformation conditions of different depths of the road under the action of dynamic load;
ε j =f(H)
c) Collecting stress values sigma corresponding to different depths at the same moment under the action of different dynamic loads ij And strain value epsilon ij Coupling to obtain a function relation of stress and strain at different depths, and exploring the stress and strain coupling relation under the action of dynamic load;
ε j =f(σ j )。
the invention has the beneficial effects that:
1. the stress and strain of the highway at different depths under the action of dynamic load are monitored in real time, the change rule of the stress and strain along with the depth is revealed, and scientific basis is provided for optimizing the structural design of the highway and reasonably designing the paving thickness of each layer of the highway;
2. the stress and strain coupling relations at different depths of the highway under the action of dynamic load are explored, the deformation damage rule of the highway is disclosed, and the damage theory of the highway under the action of the dynamic load is further developed and perfected;
3. the highway health monitoring system can monitor the real-time and long-term health of the highway in the operation period and provide data support for the health evaluation of the highway.
Drawings
FIG. 1 is a cross-sectional view of a road fiber routing of the present invention;
FIG. 2 is a plan view of the fiber routing of the present invention;
FIG. 3 is a schematic view of each strain sensor section of the present invention;
FIG. 4 is a depth direction stress variation curve;
FIG. 5 is a graph showing the change in deformation in the depth direction at the same time;
in the figure: 1-stress sensor, 2-strain sensor, 3-temperature compensation sensor.
Detailed Description
The invention is further illustrated by the following specific examples: (error-free description of the embodiment)
In this embodiment, a unilateral 3-lane example of a bidirectional 6-lane highway is taken as an example, and the highway structure includes a roadbed layer, a base layer (roadbed water stabilization layer) and a surface layer. The top surface is a surface layer, and the thickness of the surface layer is generally 15cm; the road base layer is arranged below the surface layer and is a main bearing layer, the total thickness is generally 30-40 cm, and 35cm is taken as an example in the design; the lowest part is a highway subgrade. The optical fibers are distributed on the same section perpendicular to the direction of the highway at different horizontal positions as follows: 3 layers of surface layer, 7 layers of base layer, 2 layers of roadbed and 5cm interval of optical fiber laying. The three sensors are arranged at the same position on each layer (as shown in figure 1).
In order to ensure that the embedded sensors measure more and more accurate data, the sensors should be arranged right under the road surface where the tires of the passing vehicles are frequently rolled according to the normal driving habits. The width of a single lane of the highway is 3.75m, and a common load-carrying truck runs on the outermost lane, and a car runs on two lanes on the inner side. The front track of the load-carrying truck is generally 2.05m, and the rear track is generally 1.86m; the wheel track of the car is 1.6m. In practical use, 3-4 cross sections are laid, the distance between the cross sections is 1-3m, and the layout scheme of each cross section is the same. As follows: the stress sensor 1 arranges 6 monitoring points on each layer in 3 lanes, and the distance between the positions of two measuring points of the freight lane and the boundary line of the roadway is 0.9m respectively; the measuring points of the carriageway and the overtaking lane are arranged 1.0m away from the boundary line of the carriageway and the edge line of the carriageway respectively.
The strain sensors 2 correspond to the stress sensors 1 in position, the stress sensors 1 are distributed at the center, the two sides of each strain sensor horizontally extend for 25cm, 6 sections of strain gratings are distributed at the corresponding positions of each layer, each section of strain grating is 50cm long, and one FBG strain sensor 2 is distributed in each section every 10cm (as shown in figure 3).
The temperature compensation sensors 3 are arranged on each layer in the same vertical section of the road surface and are arranged at the central positions of middle lanes of the three lanes in the same direction, the temperature compensation sensors 3 are connected to the middlemost of optical fibers of the FBG strain sensors 2, and the temperature compensation sensors 3 are grating sensors.
According to the type and the driving habit of the vehicle, the sensors are arranged at the rolling part of the wheel as much as possible. And 6 stress sensors 1 are arranged on each layer, each 2 stress sensors 1 detect one lane, and the distance between the stress sensors 1 is 1.75m, 2m, 1.75m, 1.9m and 1.94m. Strain gratings are arranged at corresponding positions of the stress sensor 1, and the grating spacing is 1.25m, 1.5m, 1.25m, 1.4m and 1.45m. The strain sensor 2 and the stress sensor 1 are arranged at the same position, and the strain sensor 2 and the stress sensor 1 are used as the center, and the two sides horizontally extend for 25cm. The temperature compensation sensors 3 are arranged 1 per layer (as shown in fig. 2).
A highway stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology comprises the following steps:
1) Point location arrangement: the sensor is embedded in a road area where wheels are rolled at high frequency, a plurality of stress sensors 1, strain sensors 2 and temperature compensation sensors 3 are embedded in the cross section of the road along the vertical direction, the sensors are distributed in a road base layer, a base layer and a surface layer of the road, and the stress sensors 1, the strain sensors 2 and the temperature compensation sensors 3 are overlaid and laid along the same vertical straight line;
2) Packaging the stress sensor 1: the stress sensor 1 is an FBG miniature soil pressure meter, the pressure bearing surface of the FBG miniature soil pressure meter is a stainless steel metal diaphragm, a sensing element of the FBG miniature soil pressure meter adopts a short-grid-pitch fiber grating, and the short-grid-pitch fiber grating is fixed at the center of the metal diaphragm through silicon sulfide rubber; an aluminum shell is arranged on the outer layer of the metal diaphragm, the short-grid-pitch fiber bragg grating is led out from a side wall hole of the shell, and the FBG miniature soil pressure meters are sequentially connected in series;
3) The strain sensor 2 is packaged: the strain sensor 2 adopts an FBG strain sensor 2, the FBG strain sensor 2 is sleeved with a plastic hose, an armor wire is packaged on the outer layer of the plastic hose, an FRP plastic protection pipe is packaged on the outer layer of the armor wire, when the FRP plastic protection pipe is stretched and deformed, an internal short-grid-pitch fiber bragg grating is deformed proportionally along with the FRP plastic protection pipe, then a plurality of FBG strain sensors 2 are connected in series, and the position of the FBG strain sensor 2 corresponds to the position of the FBG miniature soil pressure meter in the step 2);
4) Temperature compensation sensor 3 package: the temperature compensation sensor 3 is connected to the middle of the FBG strain sensor 2, and the temperature compensation sensor 3 is packaged by a metal tube;
5) Sensor laying:
a) Paving a road base layer sensor: cutting a groove along the transverse direction of a road on a road base layer, wherein the depth of the groove is not less than 10cm, arranging sensors at the bottom of the groove, arranging a stress sensor 1 at the high-frequency rolling position of wheels of each lane, then laying a strain sensor 2 and a temperature compensation sensor 3, arranging the strain sensors 2 corresponding to the stress sensors 1 and in the same level, positioning the temperature compensation sensor 3 in the center of the road, and leading out optical fibers from a road shoulder after the sensors are laid; then, backfilling and compacting roadbed fillers, and carrying out layout, backfilling and compaction on a second layer of sensors above the groove backfill layer by the same method, and paving a plurality of layers of sensors in the roadbed layer according to the steps;
b) Arranging basic sensors: when a base layer is laid, a steel plate is fixed right above a groove of the road base layer and used for reserving the groove on the base layer, a lifting hook used for removing the steel plate is arranged on the steel plate, and the thickness of the steel plate is 5cm;
firstly, coating lubricating oil on a steel plate, fixing the steel plate by using a small amount of water stabilization layer filler, then paving a water stabilization layer material, embedding the steel plate in the water stabilization layer material, paving an experimental road section by using a paver, compacting a road base by using a road roller to reach the preset height of the water stabilization layer, taking out the steel plate after maintenance is finished, and paving a plurality of layers of sensors in a groove of the base layer according to the method in the step a);
c) Paving a surface layer sensor: prefabricating a groove on the surface layer according to the method in the step b), then paving a plurality of layers of sensors in the prefabricated groove, and finally paving the surface layer flat;
d) Paving sensors on a plurality of sections of the highway according to the paving steps, wherein the distance between adjacent sections is not less than 60cm;
6) Data acquisition:
connecting the optical fiber led out from the road shoulder to a ZX-FP type demodulator, and starting to acquire data during road operation:
a) Collecting different depths (H) when the vehicle passes i ) Stress value sigma under different dynamic load ij Drawing a change curve of the stress along the depth direction, coupling to obtain a function relation between the depth and the stress under the action of different dynamic loads, and exploring the stress distribution and the stress transmission conditions of different depths of the highway under the action of the dynamic loads;
σ j =f(H)
b) Collecting different depths (H) i ) Strain value epsilon under different dynamic loads ij Drawing a change curve of the deformation along the depth direction at the same time, coupling to obtain a function relation between the depth and the strain, and exploring deformation conditions of different depths of the road under the action of dynamic load;
ε j =f(H)
c) Collecting stress values sigma corresponding to different depths at the same moment under the action of different dynamic loads ij And strain value epsilon ij Coupling to obtain a function relation of stress and strain at different depths, and exploring a stress and strain coupling relation under the action of dynamic load;
ε j =f(σ j )。
it should be noted that the above are only some embodiments of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (2)
1. A highway stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology is characterized by comprising the following steps:
1) Point location arrangement: the stress sensor, the strain sensor and the temperature compensation sensor are embedded in a road area where wheels are rolled at high frequency, a plurality of stress sensors, strain sensors and temperature compensation sensors are embedded in the cross section of a road along the vertical direction, the sensors are distributed in a road base layer, a base layer and a surface layer of the road, and the stress sensors, the strain sensors and the temperature compensation sensors are overlaid and laid along the same vertical straight line;
2) Packaging the stress sensor: the stress sensor is an FBG miniature soil pressure meter, the pressure bearing surface of the FBG miniature soil pressure meter is a stainless steel metal diaphragm, a sensing element of the FBG miniature soil pressure meter adopts a short-grid-pitch fiber bragg grating, and the short-grid-pitch fiber bragg grating is fixed at the center of the metal diaphragm through silicon sulfide rubber; the outer layer of the metal diaphragm is provided with an aluminum shell, the short-grating-pitch fiber bragg grating is led out from a side wall hole of the shell, and the FBG miniature soil pressure meters are sequentially connected in series;
3) Packaging a strain sensor: the strain sensors adopt FBG strain sensors, plastic hoses are sleeved on the FBG strain sensors, armor wires are packaged on the outer layers of the plastic hoses, FRP plastic protection pipes are packaged on the outer layers of the armor wires, when the FRP plastic protection pipes are stretched and deformed, the internal short-grid-pitch fiber bragg gratings deform in an equal proportion along with the FRP plastic protection pipes, the FBG strain sensors are connected in series, and the positions of the FBG strain sensors correspond to the positions of the miniature soil pressure meters in the step 2);
4) Packaging a temperature compensation sensor: the temperature compensation sensor is connected to the middle of the FBG strain sensor optical fiber and is packaged by a metal tube;
5) Sensor laying:
a) Paving a road base layer sensor: cutting a groove along the transverse direction of a road on a road base layer, wherein the depth of the groove is not less than 10cm, arranging sensors at the bottom of the groove, arranging a stress sensor at the high-frequency rolling position of a wheel of each lane, then laying a strain sensor and a temperature compensation sensor, arranging the strain sensors corresponding to the stress sensors and at the same level, positioning the temperature compensation sensors at the center of the road, and leading out optical fibers from a road shoulder after the sensors are laid; then, backfilling and compacting roadbed fillers, and arranging, backfilling and compacting a second layer of sensors above the trench backfill layer by the same method, and paving a plurality of layers of sensors in the roadbed layer according to the steps;
b) Arranging basic sensors: when a base layer is laid, a steel plate is fixed right above a groove of the road base layer and used for reserving the groove on the base layer, and a lifting hook used for removing the steel plate is arranged on the steel plate;
firstly, coating lubricating oil on a steel plate, fixing the steel plate by using a small amount of water stabilization layer filler, then paving a water stabilization layer material, embedding the steel plate in the water stabilization layer material, paving an experimental road section by using a paver, compacting a road base by using a road roller to reach the preset height of the water stabilization layer, taking out the steel plate after maintenance is finished, and paving a plurality of layers of sensors in a groove of the base layer according to the method in the step a);
c) Laying a surface layer sensor: prefabricating a groove on the surface layer according to the method in the step b), then paving a plurality of layers of sensors in the prefabricated groove, and finally paving the surface layer;
d) Paving sensors on a plurality of sections of the highway according to the paving steps, wherein the distance between adjacent sections is not less than 60cm;
6) Data acquisition:
connecting the optical fiber led out from the road shoulder to a ZX-FP type demodulator, and starting to acquire data during road operation:
a) Collecting different depths H when the vehicle passes i Stress value sigma under different dynamic load ij Drawing a curve of stress variation along the depth direction, coupling to obtain a functional relation between depth and stress under different dynamic loads, and exploring stress distribution and stress transmission conditions of different depths of the road under the dynamic loads;
σ j =f(H)
b) Collecting different depths H i Under different dynamic loadsStrain value epsilon ij Drawing a change curve of the deformation along the depth direction at the same time, coupling to obtain a function relation between the depth and the strain, and exploring deformation conditions of different depths of the road under the action of dynamic load;
ε j =f(H)
c) Collecting stress values sigma corresponding to different depths at the same moment under the action of different dynamic loads ij And strain value ε ij Coupling to obtain a function relation of stress and strain at different depths, and exploring a stress and strain coupling relation under the action of dynamic load;
ε j =f(σ j )。
2. the method for comprehensively monitoring the stress and the strain of the road based on the FBG fiber bragg grating sensing technology as claimed in claim 1, wherein the road base layer is paved with at least two layers of sensors, the base layer is paved with at least seven layers of sensors, and the surface layer is paved with at least two layers of sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110628666.1A CN113418641B (en) | 2021-06-07 | 2021-06-07 | Road stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110628666.1A CN113418641B (en) | 2021-06-07 | 2021-06-07 | Road stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113418641A CN113418641A (en) | 2021-09-21 |
| CN113418641B true CN113418641B (en) | 2022-11-22 |
Family
ID=77713980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110628666.1A Active CN113418641B (en) | 2021-06-07 | 2021-06-07 | Road stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113418641B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295264B (en) * | 2021-12-31 | 2022-09-06 | 兰州大学 | Fiber grating sensing monitoring method for three-dimensional load transfer rule of multilayer medium structure |
| CN114608524B (en) * | 2022-02-17 | 2023-06-06 | 武汉理工大学 | Roadbed settlement monitoring system based on weak fiber bragg grating array and monitoring method thereof |
| CN114892562A (en) * | 2022-06-22 | 2022-08-12 | 武汉理工大学 | Construction fixing method of embedded fiber grating sensor |
| CN115127513B (en) * | 2022-06-30 | 2024-02-02 | 兰州大学 | Long-distance pavement structure settlement monitoring method based on combined distributed optical fiber sensing technology and parameter inversion analysis |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353280B (en) * | 2013-07-01 | 2015-10-28 | 长安大学 | For in-ground sensor network and the dispositions method thereof of the monitoring of highway life-span |
| CN104677422B (en) * | 2015-03-03 | 2017-08-29 | 中国地震局工程力学研究所 | Many method of testings and equipment are carried out using the cold area's sandy soil embankment of fiber grating pair |
| CN106092160A (en) * | 2016-07-15 | 2016-11-09 | 东南大学 | A kind of manufacture method of the multi-functional FRP intelligent anchor rod of multiple spot temperature compensation |
| CN107064476B (en) * | 2017-06-07 | 2020-06-09 | 哈尔滨工业大学 | Road airport bituminous pavement modulus back-calculation device and method based on pavement monitoring |
| CN108489648A (en) * | 2018-03-01 | 2018-09-04 | 南京航空航天大学 | A kind of asphalt track monitoring device and method |
| CN110375898A (en) * | 2019-05-30 | 2019-10-25 | 浙江大学 | High-speed rail roadbed mechanical characteristic monitoring device and its application method, production method |
-
2021
- 2021-06-07 CN CN202110628666.1A patent/CN113418641B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113418641A (en) | 2021-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113418641B (en) | Road stress and strain comprehensive monitoring method based on FBG fiber bragg grating sensing technology | |
| CN102900011A (en) | Long-term real-time monitoring system for asphalt pavement structure information based on optical fiber Bragg grating sensor | |
| CN105547364B (en) | The splice type distributed optical fiber sensing system of roadbed internal monitoring | |
| CN107064476B (en) | Road airport bituminous pavement modulus back-calculation device and method based on pavement monitoring | |
| CN105043344B (en) | A kind of sedimentation distribution monitoring system and monitoring method based on continuous fiber section bar | |
| CN206189245U (en) | Highway bituminous pavement structure real -time supervision device | |
| CN102519748A (en) | Actual bridge loading and long-term monitoring test method for asphalt pavement of beam steel bridge | |
| CN103353280B (en) | For in-ground sensor network and the dispositions method thereof of the monitoring of highway life-span | |
| CN104976983A (en) | Slide slope distribution monitoring device and monitoring method thereof | |
| CN107091615B (en) | Intelligent geotechnical cloth suitable for monitoring and controlling deformation of high-speed railway foundation | |
| CN101900533A (en) | Optical fiber grating measurement method for monitoring embankment section settlement | |
| CN107462211B (en) | Road subgrade settlement monitoring sensor suitable for semi/rigid structural layer | |
| CN105157999B (en) | Appraisal procedure based on Distributed Optical Fiber Sensing Techniques pile integrality and lateral displacement | |
| CN107314748A (en) | A kind of long range roadbed continuous modification monitoring device and monitoring method | |
| CN204854709U (en) | Distribution monitoring devices on landslide | |
| CN106168509A (en) | Bituminous paving temperature based on Distributed Optical Fiber Sensing Techniques monitoring system | |
| CN109024717A (en) | SMW engineering method pile-type steel method for measuring stress | |
| CN211178334U (en) | Roadbed deformation monitoring system based on distributed optical fiber dynamic and static strain test | |
| CN102926368B (en) | Device and method for monitoring differential settlement of roadbed of road | |
| CN205636837U (en) | Highway foundation ditch settlement observation device | |
| CN203323712U (en) | Underground sensor network used for monitoring service life of expressway | |
| CN113431018A (en) | Frozen soil roadbed deformation field optimization monitoring equipment and method based on grating array | |
| CN203869691U (en) | Highway subgrade settlement determination device | |
| CN208857610U (en) | A kind of road structure | |
| CN207007108U (en) | A kind of long range roadbed continuous modification monitoring device |
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 |