CN205712211U - A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor - Google Patents
A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor Download PDFInfo
- Publication number
- CN205712211U CN205712211U CN201620267375.9U CN201620267375U CN205712211U CN 205712211 U CN205712211 U CN 205712211U CN 201620267375 U CN201620267375 U CN 201620267375U CN 205712211 U CN205712211 U CN 205712211U
- Authority
- CN
- China
- Prior art keywords
- pile
- fiber
- prestressed pipe
- grating sensor
- optic grating
- 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.)
- Expired - Fee Related
Links
Abstract
A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor of this utility model, agent structure includes pile for prestressed pipe, lumen center fixing device, fiber-optic grating sensor, armored optical cable, fiber grating string, clamping bearing, additional bar, fiber grating data (FBG) demodulator, computer.This utility model is relative to prior art, solve the difficult problem that pile for prestressed pipe scene Internal forces cannot accurately be tested well, burying underground of fiber grating string is simple, workable, mechanical characteristic and stress transfer mechanism that this pile for prestressed pipe Internal forces on-the-spot test technology is research pile for prestressed pipe provide effective research technique.
Description
Technical field
The invention belongs to pile foundation engineering field, relate to a kind of pile for prestressed pipe Internal forces test problem, specifically one
Plant the pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor.
Background technology
Prestressed pipe pile bearing capacity height, industrialized production, convenient transportation, site operation noiselessness, pollution-free, in China
The southeastern coastal areas are widely used.At present, prestressed pipe sunk pile mode mainly has hammering method, vibratory drilling method and Static piling,
Wherein Static piling noiselessness, friction in work progress, is widely used the urban district that environmental requirement is higher.Prestressed pipe
Mechanical characteristic and the stress transfer mechanism of stake penetration process king-pile are not yet fully apparent from, it is impossible to accurately determine that the side friction of stake divides
Cloth situation and end resistance size, the most relatively accurately obtain the internal force size along pile body distribution under load action, is conducive to dividing
Penetrating resistance from pile for prestressed pipe penetration process.Means of testing to prefabricated solenoid stake Internal forces mainly has reinforcing bar to answer at present
Power meter method and test optical fiber method, the method that in prefabricated pile, embedded bar stressometer, prefabricated pile surface groove implant Fibre Optical Sensor
Progressively promote the use of.But due to the special fabrication processes of pile for prestressed pipe, in pile tube making, Reinforcement Stress-count is embedding the most multiple
Miscellaneous, owing to the production process temperature of pile tube is high, high temperature stress meter cost is high and survival rate is low；Fibre Optical Sensor is carved on pile tube surface
Groove is implanted, and pile body elastic modelling quantity causes stake Soil Interface friction character after necessarily damaging and encapsulating also have with integrity the poorest
Different, cause a Soil Interface coefficient of friction to change, it is impossible to relatively accurately to obtain Internal forces, also cannot relatively accurately calculate stake
The distribution situation of side friction and end resistance size.Therefore, test based on scene, develop a kind of accurate pile for prestressed pipe
Internal forces method of testing and device, Accurate Determining injection and rest stage Internal forces, to pile for prestressed pipe penetrating resistance and
Long-time bearing characteristic research is significant, it is also possible to preferably promote pile for prestressed pipe hammering mechanism and bearer properties research
Theoretical.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, propose a kind of pile for prestressed pipe Internal forces dress
Put, before pile for prestressed pipe makes, in steel reinforcement cage, be previously implanted the additional bar with fiber-optic grating sensor, will implant
The steel reinforcement cage having the additional bar of band fiber-optic grating sensor puts into the steel mold that pile for prestressed pipe makes, and produces by normal
Technique makes pile for prestressed pipe.
To achieve these goals, a kind of pile for prestressed pipe Internal forces dress implanting fiber-optic grating sensor of the present invention
Put agent structure include pile for prestressed pipe, lumen center fixing device, fiber-optic grating sensor, armored optical cable, fiber grating string,
Clamping bearing, additional bar, fiber grating data (FBG) demodulator, computer；It is characterized in that: use between described fiber-optic grating sensor
Forming described fiber grating string after the series connection of described armored optical cable, spacing between described fiber-optic grating sensor and quantity are according to executing
The soil layer at work scene determines；Described clamping bearing is welded on described additional bar, described in each of described fiber grating string
On the described clamping bearing that fiber-optic grating sensor is arranged on described additional bar, described additional bar colligation is at steel reinforcement cage
Detected part；The described armored optical cable connecting described fiber-optic grating sensor guides to described steel reinforcement cage near-end along described additional bar
Portion, and be introduced to lumen center and be fixed in the described lumen center fixing device pre-set, the most often save described prestressed pipe
The all described armored optical cable of stake passes pile tube pile lining and is temporarily fixed at the described pipe at the nearly top of the described pile for prestressed pipe of this joint
In the fixing device of center, chamber；All described armored optical cables are drawn at stake top, are connected with described fiber grating data (FBG) demodulator, institute
State fiber grating data (FBG) demodulator to be connected with described computer.
Described additional bar is precast reinforced, a diameter of 20mm, a length of 400mm, and reinforcing bar grade is identical with steel bar stress；
Fiber-optic grating sensor on additional bar carries out the interval colligation of 500mm on steel reinforcement cage.
Described lumen center fixing device is decussation reinforcing bar, and it welds with the principal rod of steel reinforcement cage, is pouring coagulation
It is anchored at after soil in the concrete of pile tube inwall；Stress is caused to concentrate in order to avoid drawing armored optical cable during piling, pipe
Fixing device distance 1m position, stake top, center, chamber.
Described fiber grating self resolution of data (FBG) demodulator is high, reproducible, picking rate is fast, reliability is high, process
Ability is strong, loss is little, transmission capacity is big, it is wide to measure scope.
It is an advantage of the current invention that: relative to prior art, solve well pile for prestressed pipe scene Internal forces without
The difficult problem that method is accurately tested, burying underground of fiber grating string is simple, workable, the Internal forces on-the-spot test of this pile for prestressed pipe
Mechanical characteristic and stress transfer mechanism that technology is research pile for prestressed pipe provide effective research technique.
Accompanying drawing explanation
Fig. 1 is the agent structure principle schematic of the present invention；
Fig. 2 is for the present invention relates to additional bar structural principle schematic diagram；
Fig. 3 is the pile tube center fixture structure principle schematic that the present invention relates to.
1, pile for prestressed pipe；2, lumen center fixing device；3, fiber-optic grating sensor；4, armored optical cable；5, optical fiber light
Grid string；6, clamping bearing；7, additional bar；8, fiber grating data (FBG) demodulator；9, computer.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
As it can be seen, a kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor, agent structure includes
Pile for prestressed pipe 1, lumen center fixing device 2, fiber-optic grating sensor 3, armored optical cable 4, fiber grating string 5, clamping bearing
6, additional bar 7, fiber grating data (FBG) demodulator 8, computer 9, it is characterised in that: use institute between described fiber-optic grating sensor 3
Form described fiber grating string 5 after stating armored optical cable 4 series connection, spacing between described fiber-optic grating sensor 3 and quantity according to
The soil layer of job site determines；Described clamping bearing 6 is welded on described additional bar 7, each of described fiber grating string 5
Described fiber-optic grating sensor 3 is arranged on the described clamping bearing 6 on described additional bar 7, and the colligation of described additional bar 7 exists
The detected part of steel reinforcement cage；The described armored optical cable 4 connecting described fiber-optic grating sensor 3 guides to institute along described additional bar 7
State steel reinforcement cage close end, and be introduced to lumen center and be fixed in the described lumen center fixing device 2 pre-set, the most often save
The all described armored optical cable 4 of described pile for prestressed pipe 1 passes pile tube pile lining and is temporarily fixed at the described pile for prestressed pipe of this joint 1
In the described lumen center fixing device 2 at nearly top；All described armored optical cables 4 are drawn at stake top, with described fiber grating
Data (FBG) demodulator 8 connects, and described fiber grating data (FBG) demodulator 8 is connected with described computer 9.
Described additional bar 7 is precast reinforced, a diameter of 20mm, a length of 400mm, reinforcing bar grade and steel bar stress phase
With；Fiber-optic grating sensor 3 on additional bar 7 carries out the interval colligation of 500mm on steel reinforcement cage.
Described lumen center fixing device 2 is decussation reinforcing bar, and it welds with the principal rod of steel reinforcement cage 3, mixed pouring
It is anchored in the concrete of pile tube inwall after solidifying soil；Stress is caused to concentrate in order to avoid drawing armored optical cable 4 during piling,
Lumen center fixing device 2 is apart from 1m position, stake top.
Described self resolution of fiber grating data (FBG) demodulator 8 is high, reproducible, picking rate is fast, reliability is high, process
Ability is strong, loss is little, transmission capacity is big, it is wide to measure scope.
Claims (3)
1. implant a pile for prestressed pipe Internal forces device for fiber-optic grating sensor, agent structure include pile for prestressed pipe,
Lumen center fixing device, fiber-optic grating sensor, armored optical cable, fiber grating string, clamping bearing, additional bar, optical fiber light
Grid data (FBG) demodulator, computer；It is characterized in that: after connecting between described fiber-optic grating sensor, form institute with described armored optical cable
Stating fiber grating string, spacing and quantity between described fiber-optic grating sensor determine according to the soil layer of job site；Described folder
Holding bearing to be welded on described additional bar, each described fiber-optic grating sensor of described fiber grating string is arranged on described
On described clamping bearing on additional bar, described additional bar colligation is in the detected part of steel reinforcement cage；Connect described optical fiber light
The described armored optical cable of gate sensor guides to described steel reinforcement cage close end along described additional bar, and is introduced to lumen center and fixes
In the described lumen center fixing device pre-set, all described armored optical cable the most often saving described pile for prestressed pipe passes
Pile tube pile lining is also temporarily fixed in the described lumen center fixing device at the nearly top of the described pile for prestressed pipe of this joint；All described
Armored optical cable is drawn at stake top, is connected with described fiber grating data (FBG) demodulator, described fiber grating data (FBG) demodulator and institute
State computer to connect.
A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor the most as claimed in claim 1, its feature
Being that described additional bar is precast reinforced, a diameter of 20mm, a length of 400mm, reinforcing bar grade is identical with steel bar stress；Additional
Fiber-optic grating sensor on reinforcing bar carries out the interval colligation of 500mm on steel reinforcement cage.
A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor the most as claimed in claim 1, its feature
Being that described lumen center fixing device is decussation reinforcing bar, it welds with the principal rod of steel reinforcement cage, after casting concrete
It is anchored in the concrete of pile tube inwall；Stress is caused to concentrate, in tube chamber in order to avoid drawing armored optical cable during piling
Heart fixing device distance 1m position, stake top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620267375.9U CN205712211U (en) | 2016-04-01 | 2016-04-01 | A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620267375.9U CN205712211U (en) | 2016-04-01 | 2016-04-01 | A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205712211U true CN205712211U (en) | 2016-11-23 |
Family
ID=57312124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620267375.9U Expired - Fee Related CN205712211U (en) | 2016-04-01 | 2016-04-01 | A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205712211U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672376A (en) * | 2016-04-01 | 2016-06-15 | 青岛理工大学 | Prestressed pipe pile body internal force device with implanted fiber bragg grating sensors |
| CN111609952A (en) * | 2020-05-28 | 2020-09-01 | 机械工业勘察设计研究院有限公司 | Calibration device and method for testing pile foundation internal force by line measurement method |
| CN112082676A (en) * | 2020-08-11 | 2020-12-15 | 潍坊科技学院 | Real-time monitoring device and method for ocean engineering cofferdam stress |
-
2016
- 2016-04-01 CN CN201620267375.9U patent/CN205712211U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672376A (en) * | 2016-04-01 | 2016-06-15 | 青岛理工大学 | Prestressed pipe pile body internal force device with implanted fiber bragg grating sensors |
| CN111609952A (en) * | 2020-05-28 | 2020-09-01 | 机械工业勘察设计研究院有限公司 | Calibration device and method for testing pile foundation internal force by line measurement method |
| CN112082676A (en) * | 2020-08-11 | 2020-12-15 | 潍坊科技学院 | Real-time monitoring device and method for ocean engineering cofferdam stress |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105672376A (en) | Prestressed pipe pile body internal force device with implanted fiber bragg grating sensors | |
| CN104314070B (en) | A kind of Π shape diaphragm wall shield structure export & import construction method | |
| CN101230570A (en) | Layered multitime pressure regulating pulp conditioning casting method | |
| CN108844807B (en) | Indoor simulation test method for stress characteristic of fiber rib anti-floating anchor rod | |
| CN103215975B (en) | Inbuilt method for distributed type sensing cable in foundation pile | |
| CN102535529A (en) | Construction method of self-balancing method pile foundation bearing capacity test device | |
| CN103512686A (en) | Pile body stress testing device of static-pressure high-strength pre-stress concrete pipe pile | |
| CN205712211U (en) | A kind of pile for prestressed pipe Internal forces device implanting fiber-optic grating sensor | |
| CN103485373A (en) | Method for testing pile shaft stress of static pressure high-strength pre-stressed concrete pipe pile | |
| CN202899174U (en) | Tubular pile fiber grating sensor testing system | |
| CN102127917A (en) | Low-strain testing device for detecting integrity of ultralong bored concrete pile | |
| CN207567836U (en) | Compression test stake ess-strain comprehensive detection system | |
| CN107560776A (en) | A kind of nonmetallic anti-float anchor rod multiple solutions shear stress joint test method | |
| CN108532649A (en) | A kind of compressive static load test method of bored concrete pile | |
| CN103645061A (en) | Lattice anchoring technology large-scale physical model test method | |
| CN110411646A (en) | Formation pore hydraulic pressure force test device, production method and its application method after a kind of shield tunnel wall | |
| CN106436576A (en) | Constructing method of main tower of cable-stayed bridge through circumferential prestressing force | |
| CN107167385B (en) | Indoor test method for stress loss of anchor rod | |
| CN105780826A (en) | Field testing method for internal force of pile body of prestressed pipe pile in which fiber bragg grating sensors are implanted | |
| CN111257101A (en) | Group anchor effect model test device and detection method | |
| CN112982509B (en) | Construction method of pre-stressed anchor cable axial force transmission rule mathematical model in composite stratum based on field drawing test | |
| CN207215347U (en) | A kind of nonmetallic anti-float anchor rod multiple solutions shear stress joint test device | |
| WO2020211285A1 (en) | Inspection and construction method for composite cement-soil pile | |
| CN203479436U (en) | Pile body stress test apparatus for static-pressure prestressed high-strength concrete pile | |
| Yang et al. | Experiment investigation on stress characteristics of grouting microsteel pipe piles with cement-soil wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20180401 |