CN207244680U - A kind of sunk bridge pile foundation washes away real-time monitoring system - Google Patents
A kind of sunk bridge pile foundation washes away real-time monitoring system Download PDFInfo
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- CN207244680U CN207244680U CN201720990722.5U CN201720990722U CN207244680U CN 207244680 U CN207244680 U CN 207244680U CN 201720990722 U CN201720990722 U CN 201720990722U CN 207244680 U CN207244680 U CN 207244680U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 77
- 239000000835 fiber Substances 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 230000003204 osmotic effect Effects 0.000 claims abstract description 24
- 230000010485 coping Effects 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 238000012806 monitoring device Methods 0.000 claims description 14
- 239000013307 optical fiber Substances 0.000 claims description 13
- 238000013461 design Methods 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
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- 230000008859 change Effects 0.000 abstract description 16
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 14
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- 238000004458 analytical method Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
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- 230000003044 adaptive effect Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010835 comparative analysis Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
The utility model discloses a kind of sunk bridge pile foundation to wash away real-time monitoring system, pier coping portion is equipped with data handling system, the bridge pier is setting a miniature osmotic pressure sensor of fiber grating below the water surface in the outer wall surface of position, on the riverbed of the pile foundation bottom sinker is being equipped with pile foundation position, fixed setting monitoring nose girder on the sinker, the bridge pier middle position is equipped with the limiting device for being used for preventing monitoring nose girder radial motion, the monitoring nose girder lower end position is equipped with the miniature osmotic pressure sensor of a fiber grating and one group of fiber bragg grating pressure sensor；The beneficial effects of the utility model are, suitable in real time monitoring underwater pile near due to washing away caused by soil pressure against piles change and fluctuation in stage caused by variation in water pressure, so as to analyze to obtain a side current scour and influence of the water level height to pile foundation safety, have high-durability, it is high-precision, simple in structure, monitor in real time and be easy to engineering and lay.
Description
Technical field
It the utility model is related to field of measuring technique, and in particular to a kind of sunk bridge pile foundation washes away monitoring system in real time
System.
Background technology
Bridge is the important component of road and rail traffic, and the quality of its maintenance situation directly affects the unimpeded of road
And traffic safety, China are bridge big countries, many bridges are located on rivers,lakes and seas, and the pile foundation of bridge inevitably receives water
The continuous erosion of stream, current wash away the principal element for causing Bridge Pier unstability.
The underwater pile of more Jiang Qiaoliang over strait can be influenced by current scour, Pile side soil Scour and Accretion occur, so as to influence stake
Soil pressure and the pile foundation safety of side.Therefore in recent years, how the underwater soil layer near pile foundation is seen in science of bridge building
Survey has become engineering circles very concern.
It is that bridge structural health monitoring needs that pays close attention to ask to be destroyed by the lower caused bridge damnification of current scour effect
Topic, the long-term safety operation to ensureing more Jiang Qiaoliang over strait are of great significance.If the soil of bridge pile foundation side can be grasped in real time
The information that layer is changed by current scour, you can the method in time using appropriate engineering reinforcement during bridge operation effectively reduces
Accident odds, the service life of extending structure.
Monitoring to bridge pile foundation nearby underwater soil layer scour, current existing method formula be by retainer instrument monitoring and
Portable instrument monitors, and the principle of use has the method for sonar technique and multi-beam, is all mainly that the measurement water surface is situated between to silt layer
Change in depth between matter.But these method monitoring accuracies are different, applicable elements are different：First, these methods generally can not be real
When follow-on test be observed, it is necessary to periodically go out ship, and influenced caused by the reciprocal change of the complexity that erosion and deposition layer cannot be rejected, its
What test obtained is only the change in depth of water and silt interface, can not consider the variable density of interface lower floor silt soil layer, therefore
It can not accurately obtain whether pile foundation lateral earth pressure is changed.The precision of its measurement is also very easily subject to the external worlds such as wave
The interference of environment is complicated, it is necessary to be constantly corrected to adapt to the environmental change in different waters.Second, this method
Cannot monitor bridge pile foundation nearside wash away caused by soil pressure change, what is obtained is that the landform of underwater large scale washes away evolution,
Stake side is test blindspot on the contrary.
Utility model content
For the deficiency of existing technology, the utility model provides a kind of accurately and reliably sunk bridge pile foundation and washes away
Real-time monitoring system.
The technical solution of the utility model is as follows：
A kind of sunk bridge pile foundation washes away real-time monitoring system, including pile foundation and the bridge pier that is arranged in pile foundation, it is special
Sign is that the pier coping portion is equipped with data handling system, and the bridge pier, which is located in the outer wall surface below the water surface at position, to be set
A miniature osmotic pressure sensor of fiber grating is put, the bridge pier side is equipped with monitoring device, and the monitoring device includes being arranged on
Sinker on the riverbed of pile foundation position and the monitoring nose girder being fixed on sinker, the bridge pier, which is equipped with, to be used to prevent from supervising
Survey the limiting device of device radial motion, the monitoring nose girder lower end position be equipped with the miniature osmotic pressure sensor of a fiber grating and
One group of fiber bragg grating pressure sensor；The miniature osmotic pressure sensor of the fiber grating and fiber bragg grating pressure sensor pass through respectively
Data cable is connected with data handling system circuit.
A kind of sunk bridge pile foundation washes away real-time monitoring system, it is characterised in that includes including monitoring nose girder
Upper end channel steel and the lower end channel steel with the splicing of upper end channel steel, the upper end channel steel is fixed with lower end channel steel using double-canopy crab bolt to be connected
Connect, concrete has been poured in the lower end channel steel, monitor the miniature osmotic pressure sensor of fiber grating and optical fiber of nose girder lower end position
Grating pressure sensor is embedded on the concrete of lower end channel steel, and spaced set between all the sensors；The monitoring is led
Beam length can be adjusted accordingly according to design requirement.
A kind of sunk bridge pile foundation washes away real-time monitoring system, it is characterised in that the sinker uses right angle
Triangular prism shaped concrete block, and the edges and corners mill for being inserted into riverbed one end is set as planar structure.
A kind of sunk bridge pile foundation washes away real-time monitoring system, it is characterised in that begins the sinker upper surface
Flushed eventually with riverbed surface.
A kind of sunk bridge pile foundation washes away real-time monitoring system, it is characterised in that the limiting device includes
Steel strand wires and rectangular sleeve, the steel strand wires carry the coating of epoxy resin, and surround pile foundation one week, are fixed on rectangular sleeve
On, the rectangular sleeve is placed on monitoring nose girder from top to down, the structure size of rectangular sleeve and the size phase for monitoring nose girder
Match somebody with somebody.
A kind of sunk bridge pile foundation washes away real-time monitoring system, it is characterised in that the data handling system
, can be by the wavelength data for the sensor that optical fiber data line passes over by being wirelessly transferred using wireless fiber Bragg grating (FBG) demodulator
Stored to cloud database.
A kind of sunk bridge pile foundation washes away real-time monitoring system, it is characterised in that the fiber grating is miniature
Osmotic pressure sensor and fiber bragg grating pressure sensor are connected with data handling system by optical fiber data line respectively, and fiber data
Teleflex for waterproof is set outside line.
The beneficial effects of the utility model are that the system is mainly for bridge pier local environment feature and at this stage to bridge
Beam foundation scouring is unable to continuous monitoring and the present situation not applied in the river that The turbulent river crashes its way through, attached suitable for monitoring underwater pile in real time
The variation in water pressure closely caused by soil pressure against piles change caused by washing away and fluctuation in stage, so as to analyze to obtain a side current
The just influence to pile foundation safety with water level is washed away, can be widely applied to science of bridge building safety monitoring ring that is newly-built or having built up
In border, have the advantages that high-durability, height, it is simple in structure, monitor in real time and be easy to engineering laying.
Brief description of the drawings
Fig. 1 is the side structure schematic diagram of the utility model；
Fig. 2 is the positive structure schematic of the utility model；
Fig. 3 is the sinker structure diagram of the utility model；
Fig. 4 is the limit device structure schematic diagram of the utility model；
Fig. 5 is the utility model monitoring flow chart；
In figure：1- data handling systems, the miniature osmotic pressure sensor of 2- fiber gratings, 3- fiber bragg grating pressure sensors, 4-
Monitor nose girder, 5- sinkers, 6- limiting devices.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in Figs. 1-5, a kind of sunk bridge pile foundation washes away real-time monitoring system, including data handling system 1, optical fiber
The miniature osmotic pressure sensor 2 of grating, fiber bragg grating pressure sensor 3, monitoring nose girder 4, sinker 5 and limiting device 6.
Data handling system 1 is arranged on monitoring point bridge pier top surface, and data handling system 1 is to be wirelessly transferred fiber grating demodulation
Instrument, is connected by optical fiber data line with sensor, and the data that sensor transmits are reached cloud database by being wirelessly transferred, right
Than the data of sensor, data comparison is carried out by computer and analysis draws the real time status of pier subsidence.
The miniature osmotic pressure sensor 2 of fiber grating is equipped with two, on the outer wall of a position being arranged on below the bridge pier water surface,
There is certain depth apart from the water surface, variation in water pressure caused by fluctuation in stage can be monitored in real time, another is arranged on monitoring nose girder 4
On, it is responsible for monitoring the variation in water pressure near monitoring nose girder 4；And the data of variation in water pressure are reached into data processing in the form of wavelength
System 1.Wavelength can be converted into pressure by equation below：
Pr=Kp1ΔP2+Kp2ΔP；
Δ P=(P-P0)-Kt(T-T0)；
Kp1(Mpa/nm)：Constant；
Kp2(Mpa/nm)：Constant；
P0(nm)：Pressure fiber grating initial wavelength during measurement；
P(nm)：Wavelength during pressure measurement；
T(℃)：Environment temperature when T is the measurement of P values；
T0(℃)：P0Environment temperature during value measurement；
Kt(nm/℃)：Constant, is the ratio of wavelength shift value/temperature.
During by ordinary water level, the detection reading of the miniature osmotic pressure sensor 2 of fiber grating is denoted as p on bridge pierr0, will be risen because of tide
The monitoring reading of the miniature osmotic pressure sensor 2 of falling fiber grating is denoted as pr；Then have：
Δ p=pr-pr0；
In above formula, Δ p is variation in water pressure value caused by fluctuation in stage, on the basis of the hydraulic pressure of ordinary water level.Fiber grating
The data of miniature 2 gained fluctuation in stage of osmotic pressure sensor can be used for point that SEA LEVEL VARIATION influences bridge pile foundation security and stability
Analysis, by the comparative analysis with 3 pressure sensor data of fiber bragg grating pressure sensor, can reject water level caused by tide bulge and fall
Change the influence to pressure sensor.
In 5 injection riverbed of sinker, top surface is substantially flush with riverbed, and sinker 5 is right-angle prismatic cylindricality concrete block, and is buried
Edges and corners, which have, necessarily polishes width, both ensure that in the smooth injection riverbed of sinker energy, while provide enough resistances to prevent from sinking
5 injection of block is too deep, obtains 5 size of sinker according to designed by measurement place soil property situation, riverbed surface sandstone is taken away in river degradation
While, it is ensured that 5 top surface of sinker keeps being substantially flush with riverbed surface all the time, reduces shadow of the river degradation to monitoring data
Ring, to ensure that the reading of fiber bragg grating pressure sensor 3 meets with actual conditions as far as possible.
The design focal point of the utility model is that monitoring device can increase with scour depth and stablize sinking, and passes through optical fiber light
3 real-time dynamic monitoring pile foundation scour of grid voltage force snesor and change of back-silting；Consider the riverbed earthen situation of monitoring field, obtain
Fetch earth the unit weight γ, unconfined compressive strength q of layeru, internal friction angleEtc. data, and consider current scour to holding force layer surface one
Determine the influence of deep soil compactness, reduction coefficient μ (0 ＜ μ≤1), the ratio using μ γ as supporting course topsoil are taken to γ
Weight, the concrete numerical value of μ are determined according to the soil property of monitoring field.The size design of lower end weight is carried out, according to requirement of engineering and is applied
Work difficulty or ease draft the high h of lower end weight, and wide b and the corner angle that bury polish width c, and assume the long x of lower end weight.
Superstructure weight：G1；
Substructure weight：
The vertical stress component of side soil pressure：
The reaction force that the horizontal component of soil pressure against piles is given with pile foundation：
FC is horizontal=FPile foundation；
End resistance：Fd=qu·c·x；
Water buoyancy：Ff=ρwgVRow；
In above formula, γ0For the unit weight of concrete, γ is generally taken0=2400kg/m3, γ ' is the effective of riverbed supporting course soil
Severe, γ '=μ γ-γw, γwFor the severe of water, KpFor coefficient of passive earth pressure,
It can to sum up be obtained by mechanical balance：
G1+G2=FC+Fd+Ff；
It can be derived from x.
Above-mentioned design, combines monitoring point riverbed supporting course soil property situation, ensure that in the case of scour depth is increased,
5 top surface of sinker can be kept being substantially flush with holding force layer surface all the time, eliminate influence of the soil to flushing monitoring of back-silting；Make this dress
Put under water can adaptive tracing wash away supporting course, accurately monitoring is analyzed is carried out in real time to the underwater dynamic evolution that washes away.
Monitoring nose girder 4 is fixed on sinker 5, and monitoring nose girder 4 is spliced for two channel steels, is poured in the channel steel of lower part
Concrete, and the miniature osmotic pressure sensor 2 of fiber grating and fiber bragg grating pressure sensor 3 are fixed wherein, while ensure optical fiber
Grating pressure sensor 3 is contacted with water and the direct of backfill mud；Fiber bragg grating pressure sensor 3 is arranged with a determining deviation and phase
It is connected in parallel between mutually, and respective data measured is reached into data handling system 1 through optical fiber data line in real time.Fiber grating pressure
The wavelength readings of sensor 3 in water can pass through formula：
Pr=Kp[(P-P0)-Kt(T-T0)]；
Kp(Mpa/nm)：Constant, is the ratio of cell pressure/wavelength；
Kt(nm/℃)：Constant, is the ratio of wavelength shift value/temperature；
P0(nm)：Pressure fiber grating initial wavelength during measurement；
T0(nm)：P0External temp fiber grating initial wavelength in measurement；
T(nm)：TIt isPExternal temp optic fiber grating wavelength in measurement；
P(nm)：Wavelength during pressure measurement；
Pressure is converted into, and it is linear；The number integrated by 2 data of osmotic pressure sensor miniature with fiber grating
The real time status washed away can be tried to achieve according to analysis and mechanical analysis.
Limiting device 6 is positioned close on the outer wall in pile foundation centre position, and limiting device 6 includes steel strand wires and rectangular sleeve
Cylinder, steel strand wires outer layer scribble epoxy resin, are fixed on rectangular sleeve both ends within one week around pile foundation, rectangular sleeve is placed on from top to bottom
Monitor on nose girder 4, so that it is guaranteed that the displacement of vertical direction can only occur for the monitoring device；The structure size of rectangular sleeve regards prison
Survey depending on the size of nose girder, monitoring nose girder 4 is longer, and the height of rectangular sleeve is higher.
The specific method of the utility model monitoring can be roughly divided into following two classes according to the earthing situation in monitoring device：
i：Without the soil layer that back-silts in monitoring device；
This monitoring device adaptive tracing supporting course, therefore according to design, embedded depth is the height of lower end sinker；
Take the lowermost fiber bragg grating pressure sensor reading combination the following formula：
P- Δ p=γwhw；
H=d+hw；
Above formula：p(Pa)：The actual measurement outside pressure of fiber bragg grating pressure sensor；
γw(N/cm3)：The severe of water；
hw(cm)：The depth of water of sensor present position；
h(cm)：Holding force layer surface to the water surface distance；
d(cm)：The radius of fiber-optic grating sensor.
Δp(pa)：Variation in water pressure caused by fluctuation in stage.
ii：There is the soil layer that back-silts in monitoring device；
Take the reading of osmotic pressure sensor and bottom fiber bragg grating pressure sensor and combination
The following formula：
p1- Δ p=γ ' zKp+2c√Kp+γwhw1………①
p2- Δ p=γwhw2………②
hw1=hw2+b………③
B=(n-1) a ... ... is 4.
1. 2. 3. 4. synthesis can release bottom sensor buried depth：
Above formula：p1(Pa)：The actual measurement outside pressure of fiber bragg grating pressure sensor；
p2(Pa)：The actual measurement outside pressure of Fiber bragg grating osmometer；
hw1(cm)：The depth of water of fiber bragg grating pressure sensor present position；
hw2(cm)：The depth of water of Fiber bragg grating osmometer present position；
Kp：Coefficient of passive earth pressure,
Δp(pa)：Variation in water pressure caused by fluctuation in stage；
B is osmotic pressure sensor and the spacing of bottom fiber bragg grating pressure sensor；
A is the spacing of adjacent sensors；
N is the number of sensor on monitoring nose girder 4；
Soil layer surface of back-silting can be to sum up obtained by formula once to the distance h of the water surface：
H=hw1-z；
Back-silt the thickness of the layer t：
T=z+d.
The operation principle of the utility model is as follows：
Data handling system 1 is fixed on the top surface of measuring point bridge pier, with Fiber bragg grating osmometer 2 and fiber grating pressure
Connected between sensor 3 by optical fiber data line；Fiber bragg grating osmometer 2 and fiber bragg grating pressure sensor 3 are supervised in real time
The change of water level is surveyed, and data are reached into data handling system 1.
The monitoring method step of the utility model is as follows：
1) hydraulic pressure caused by bridge pier and nose girder fluctuation in stage is monitored in real time by the miniature osmotic pressure sensor 2 of fiber grating to become
Change, and data are reached to data handling system 1 in the form of wavelength；
2) pressure change caused by monitoring outside water and the soil that back-silts in real time by fiber bragg grating pressure sensor 3, and will
Data reach data handling system 1 in the form of wavelength；
3) data that the miniature osmotic pressure sensor 2 of fiber grating and fiber bragg grating pressure sensor 3 are transmitted are passed through wireless
Cloud database storage is reached, and the data analysis integrated and mechanical analysis try to achieve the real time status washed away.
The utility model monitoring system depends on pile foundation vertically decentralization and injection riverbed supporting course, and is installed on monitoring nose girder
Limiting device, prevents detection device from the phenomenon of toppling away from pile foundation occurs.With the depth increase of scour hole, monitoring device is at the same time
Vertical displacement is done gradually downward, and the pressure sensor on monitoring tube in real time can pass the wavelength data obtained by pressure change at this time
Into fiber Bragg grating (FBG) demodulator.Being wirelessly transferred fiber Bragg grating (FBG) demodulator will be reached from the data obtained by sensor by being wirelessly transferred
Cloud database, carries out the comparative analysis of data and image, and pile foundation scour can be restored by being calculated by necessary computer
Real time status.It can be realized by this monitoring device：Carry out pile foundation nearside different depth in real time and wash away the Pile side soil pressure of overall process
Power variation monitoring, solves the problems, such as the monitoring and early warning of pile foundation scour and fluctuation in stage under Complex Water Environment, can be normal in bridge
The dynamic monitoring of pile foundation scour is carried out in the case of operation, does not influence traffic, and with it is easy to operate, performance is stable, monitoring number
According to it is accurate the advantages that.
This monitoring system uses fiber-optic grating sensor.Fiber grating is at present in intelligent Material Systems research using most
For one of extensive sensing element, its operation principle is that the change of external physical quantity causes the change of fiber optic hub wavelength, by light
The change of fine Prague centre wavelength obtains measured value.This measuring method clear thinking, simple operation, it is easy to be wide
Large-engineering technician receives.The advantages of fiber sensing element, is mainly shown as electromagnetism interference；It is corrosion-resistant；Quasi-distributed measurement,
Absolute measurement, signal attenuation are small；The advantages that high sensitivity, precision is high.In addition, the Real-time security monitoring of structure has become in recent years
One of hot spot studied both at home and abroad, the optical fiber technology as monitoring structural health conditions important means have also obtained great development.Cause
The advantages of this present apparatus combination fiber grating is perceived and transmitted, pointedly have developed suitable underwater bridge pile foundation monitoring
With the real-time monitoring device of Fiber Bragg Grating technology, the characteristics of FBG monitoring precision is high, durability is good has been given full play to, gram
The shortcomings that having taken conventional test methodologies, is very suitable for the flushing monitoring of newly-built and existing underwater bridge pile foundation, has the excellent of uniqueness
Gesture.
Fiber-optic grating sensor is employed, it has the following advantages：First, its adaptability, corrosion resistance is strong, can be multiple
Long-term work is carried out under miscellaneous working environment.Second：Because the length of grating is small, only grade, measured value spatial discrimination
Rate is high, i.e., fiber-optic grating sensor has higher precision.3rd：Fiber-optic grating sensor electromagnetism interference and external environment
Interference is strong.
Claims (7)
1. a kind of sunk bridge pile foundation washes away real-time monitoring system, including pile foundation and the bridge pier that is arranged in pile foundation, its feature
It is, the pier coping portion is equipped with data handling system (1), and the bridge pier, which is located in the outer wall surface below the water surface at position, to be set
A miniature osmotic pressure sensor of fiber grating (2) is put, the bridge pier side is equipped with monitoring device, and the monitoring device includes setting
Set on the sinker (5) on the riverbed of pile foundation position and the monitoring nose girder (4) being fixed on sinker (5), the bridge pier
It is useful for preventing the limiting device (6) of monitoring device radial motion, described monitoring nose girder (4) lower end position is equipped with an optical fiber light
The miniature osmotic pressure sensor of grid (2) and one group of fiber bragg grating pressure sensor (3)；The miniature osmotic pressure sensor of fiber grating (2)
And fiber bragg grating pressure sensor (3) is connected by data cable with data handling system (1) circuit respectively.
2. a kind of sunk bridge pile foundation according to claim 1 washes away real-time monitoring system, it is characterised in that including prison
Surveying nose girder (4) includes upper end channel steel and the lower end channel steel with the splicing of upper end channel steel, and the upper end channel steel is with lower end channel steel using double
Cover plate bolt is fixedly connected, and concrete has been poured in the lower end channel steel, and the fiber grating for monitoring nose girder (4) lower end position is miniature
Osmotic pressure sensor (2) and fiber bragg grating pressure sensor (3) are embedded on the concrete of lower end channel steel, and between all the sensors
Spaced set；Described monitoring nose girder (4) length can be adjusted accordingly according to design requirement.
3. a kind of sunk bridge pile foundation according to claim 1 washes away real-time monitoring system, it is characterised in that described heavy
Block (5) uses the concrete block of right-angle prismatic cylindricality, and the edges and corners mill for being inserted into riverbed one end is set as planar structure.
4. a kind of sunk bridge pile foundation according to claim 1 washes away real-time monitoring system, it is characterised in that described heavy
Block (5) upper surface is flushed with riverbed surface all the time.
5. a kind of sunk bridge pile foundation according to claim 1 washes away real-time monitoring system, it is characterised in that the limit
Position device (6) includes steel strand wires and rectangular sleeve, and the steel strand wires carry the coating of epoxy resin, and surround pile foundation one week, Gu
Due in rectangular sleeve, the rectangular sleeve is placed on monitoring nose girder (4) from top to down, the structure size of rectangular sleeve and monitoring
The size of nose girder (4) matches.
6. a kind of sunk bridge pile foundation according to claim 1 washes away real-time monitoring system, it is characterised in that the number
Wireless fiber Bragg grating (FBG) demodulator is used according to processing system (1), can be by the number of wavelengths for the sensor that optical fiber data line passes over
Stored according to by being wirelessly transmitted to cloud database.
7. a kind of sunk bridge pile foundation according to claim 1 washes away real-time monitoring system, it is characterised in that the light
The fine miniature osmotic pressure sensor of grating (2) and fiber bragg grating pressure sensor (3) pass through fiber count with data handling system (1) respectively
Connected according to line, and the teleflex for waterproof is set outside optical fiber data line.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107460898A (en) * | 2017-08-09 | 2017-12-12 | 浙江工业大学 | A kind of sunk bridge pile foundation washes away real-time monitoring system and its monitoring method |
| CN110004994A (en) * | 2019-04-26 | 2019-07-12 | 瑞安市职业中等专业教育集团学校 | A kind of bridge pier washes away real-time monitoring device and its application method |
| CN110185066A (en) * | 2019-05-08 | 2019-08-30 | 中交天津港湾工程研究院有限公司 | A kind of sheet pile and block structure water environment original position exposure test device and its implementation method |
| CN113775532A (en) * | 2021-11-11 | 2021-12-10 | 济南英华自动化技术有限公司 | Distributed cable channel on-line monitoring system |
| CN114046743A (en) * | 2021-09-24 | 2022-02-15 | 浙江大学 | Intelligent monitoring system for wharf pile foundation |
| CN115182391A (en) * | 2022-07-26 | 2022-10-14 | 中交第三航务工程局有限公司 | Construction method of anti-scouring interlocking block soft mattress for large-diameter single pile |
| CN115839111A (en) * | 2023-02-17 | 2023-03-24 | 山东科技大学 | Device and method for monitoring total life cycle embedding depth of ocean foundation |
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2017
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