CN105696635A - Device for testing internal force of body of prestressed pipe pile with embedded stressed reinforcing steel bars - Google Patents
Device for testing internal force of body of prestressed pipe pile with embedded stressed reinforcing steel bars Download PDFInfo
- Publication number
- CN105696635A CN105696635A CN201610205523.9A CN201610205523A CN105696635A CN 105696635 A CN105696635 A CN 105696635A CN 201610205523 A CN201610205523 A CN 201610205523A CN 105696635 A CN105696635 A CN 105696635A
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- CN
- China
- Prior art keywords
- prestressed pipe
- pile
- steel bar
- optical fiber
- bar stress
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a device for testing the internal force of the body of a prestressed pipe pile with embedded stressed reinforcing steel bars. A main body structure comprises a prestressed pipe pile, the stressed reinforcing steel bars, open slots, epoxy resin, pipe cavity center fixing devices, optical fibers, armored optical cables, an optical fiber grating data demodulator and a computer. Compared with the prior art, the device has the advantages that the problem of incapability of accurately testing the internal force of the body of the prestressed pipe pile is solved very well, the testing system improves the survival rate of the optical fibers, the optical fibers are simple to embed, the operability is strong, a novel deformation distributed testing method for the body of the prestressed pipe pile is provided, and the high-efficiency convenient continuity testing is realized.
Description
Technical field
The invention belongs to pile foundation engineering field, relate to a kind of high-strength prestressed concrete pipe pile Internal forces test problem, specifically a kind of pile for prestressed pipe Internal forces test device implanting steel bar stress。
Background technology
The main method one of high-strength prestressed concrete pipe pile Internal forces test is reinforcing rib meter method, reinforcing rib meter is embedded on the main muscle of pile body according to soil layer construction, ess-strain according to a certain cross section of pile body detects the internal force in pile body correspondence cross section, strain except measuring point, the deformation between 2 can only lean on deduction。This method of testing principle is simple, easily operated, but this measurement to pile body deformation is main or point type detection, measuring point is discontinuous, easy missing inspection, reinforcing rib meter is easily impaired when concreting, it is impossible to normal operation, fragmentary point data is difficult to reflect pile quality and stake and each point of stratum interlaminar action rule, too much wire influence pile body structure and bearing capacity comprehensively。Another kind is measuring techniques for optical fiber, within the scope of whole testing length, can follow-on test, inferred-zero drifts about, not charged work, and anti-electromagnetic interference capability is strong, optical fiber can pass through pre-buried at pile with fluting, then closing with glue, after pile body elastic modelling quantity is caused certain damage and encapsulates by this method, stake Soil Interface friction character also has different with integrity, causes that a Soil Interface coefficient of friction changes。Therefore exploitation one relatively accurately obtains pile for prestressed pipe Internal forces, relatively accurately calculates that the distribution situation of pile for prestressed pipe pile side friction and the method for end resistance size become an instant job。
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, a kind of pile for prestressed pipe Internal forces test device implanting steel bar stress is proposed, before pile for prestressed pipe makes, in steel bar stress, it is previously implanted optical fiber, makes pile for prestressed pipe by normal production technology。
To achieve these goals, a kind of pile for prestressed pipe Internal forces test device implanting steel bar stress of the present invention, agent structure includes pile for prestressed pipe, steel bar stress, fluting, epoxy resin, lumen center fixing device, optical fiber, armored optical cable, fiber grating data (FBG) demodulator, computer；It is characterized in that: slot on stress steel, in groove, first put last layer epoxy resin；Optical fiber is put on the epoxy resin of groove, then slots with epoxy resin sealing；Optical fiber is from steel bar stress Base top contact, and protects with armored optical cable, and armored optical cable is guided on the fixing device in official jargon center fixing；Armored optical cable is connected with fiber grating data (FBG) demodulator；Fiber grating data (FBG) demodulator is connected with computer。
The described steel bar stress implanting optical fiber has root, and is laid in equably in described pile for prestressed pipe；Groove depth 2mm, width 2mm；Optical fiber is drawn from steel bar stress top 20mm；The fixing device of lumen center is decussation reinforcing bar, and it welds with the principal rod of steel reinforcement cage, is anchored in the concrete of pile tube inwall after casting concrete；Stress is caused to concentrate in order to avoid drawing armored optical cable in piling process, lumen center fixing device distance 1m position, stake top。
Described fiber grating self resolution of data (FBG) demodulator is high, reproducible, picking rate is fast, reliability is high, disposal 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 the difficult problem that pile for prestressed pipe Internal forces cannot accurately be tested well, this test system improves the survival rate of optical fiber, burying underground of optical fiber is simple, workable, provide a kind of new pile for prestressed pipe pile body deformation distributed measurement method, it is achieved efficiently, easily seriality measure。
Accompanying drawing explanation
Fig. 1 is that the optical fiber of the present invention is in reinforcing bar inner structure principle schematic；
Fig. 2 is the Epoxy Resin Reinforcement inner structure principle schematic of the present invention；
Fig. 3 is for the present invention relates to reinforcing bar in pile for prestressed pipe inner structure principle schematic；
Fig. 4 is the pile tube center fixture structure principle schematic that the present invention relates to。
1, pile for prestressed pipe；2, steel bar stress；3, fluting；4, epoxy resin；5, the fixing device of lumen center；6, optical fiber；7, armored optical cable；8, fiber grating data (FBG) demodulator；9, computer。
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in the figure, a kind of pile for prestressed pipe Internal forces test device implanting steel bar stress, agent structure includes pile for prestressed pipe 1, steel bar stress 2, fluting 3, epoxy resin 4, lumen center fixing device 5, optical fiber 6, armored optical cable 7, fiber grating data (FBG) demodulator 8, computer 9；It is characterized in that: on steel bar stress 2, slot 3, in groove, first put last layer epoxy resin 4；Optical fiber 6 is put on the epoxy resin 4 of groove, then closes fluting 3 with epoxy resin 4；Optical fiber 6 is from steel bar stress 2 Base top contact, and protects with armored optical cable 7, and armored optical cable 7 is guided on the fixing device 5 in official jargon center fixing；Armored optical cable 7 is connected with fiber grating data (FBG) demodulator 8；Fiber grating data (FBG) demodulator 8 is connected with computer。
The steel bar stress 2 of implantation optical fiber 6 of the present invention has 4, and is laid in equably in described pile for prestressed pipe 1；Slot 3 degree of depth 2mm, width 2mm；Optical fiber 6 is drawn from steel bar stress 2 top 20mm；The fixing device 5 of lumen center is decussation reinforcing bar, and it welds with the principal rod of steel reinforcement cage, is anchored in the concrete of pile tube inwall after casting concrete；Causing stress to concentrate in order to avoid drawing armored optical cable 7 in piling process, the fixing device 5 of lumen center is apart from 1m position, stake top。
Self resolution of fiber grating data (FBG) demodulator 8 of the present invention is high, reproducible, picking rate is fast, reliability is high, disposal ability is strong, loss is little, transmission capacity is big, it is wide to measure scope。
Claims (3)
1. implanting a pile for prestressed pipe Internal forces test device for steel bar stress, agent structure includes pile for prestressed pipe, steel bar stress, fluting, epoxy resin, lumen center fixing device, optical fiber, armored optical cable, fiber grating data (FBG) demodulator, computer；It is characterized in that: slot on stress steel, in groove, first put last layer epoxy resin；Optical fiber is put on the epoxy resin of groove, then slots with epoxy resin sealing；Optical fiber is from steel bar stress Base top contact, and protects with armored optical cable, and armored optical cable is guided on the fixing device in official jargon center fixing；Armored optical cable is connected with fiber grating data (FBG) demodulator；Fiber grating data (FBG) demodulator is connected with computer。
2. a kind of pile for prestressed pipe Internal forces test device implanting steel bar stress as claimed in claim 1, it is characterised in that the described steel bar stress implanting optical fiber has root, and is laid in equably in described pile for prestressed pipe；Groove depth 2mm, width 2mm；Optical fiber is drawn from steel bar stress top 20mm；The fixing device of lumen center is decussation reinforcing bar, and it welds with the principal rod of steel reinforcement cage, is anchored in the concrete of pile tube inwall after casting concrete；Stress is caused to concentrate in order to avoid drawing armored optical cable in piling process, lumen center fixing device distance 1m position, stake top。
3. a kind of pile for prestressed pipe Internal forces test device implanting steel bar stress as claimed in claim 1, it is characterised in that described fiber grating self resolution of data (FBG) demodulator is high, reproducible, picking rate is fast, reliability is high, disposal ability is strong, loss is little, transmission capacity is big, it is wide to measure scope。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610205523.9A CN105696635A (en) | 2016-04-05 | 2016-04-05 | Device for testing internal force of body of prestressed pipe pile with embedded stressed reinforcing steel bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610205523.9A CN105696635A (en) | 2016-04-05 | 2016-04-05 | Device for testing internal force of body of prestressed pipe pile with embedded stressed reinforcing steel bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105696635A true CN105696635A (en) | 2016-06-22 |
Family
ID=56218970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610205523.9A Pending CN105696635A (en) | 2016-04-05 | 2016-04-05 | Device for testing internal force of body of prestressed pipe pile with embedded stressed reinforcing steel bars |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105696635A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130598A (en) * | 2017-06-07 | 2017-09-05 | 安徽省建筑科学研究设计院 | A kind of glass fibre rib concrete pile containing optical fiber |
| CN113702158A (en) * | 2021-08-31 | 2021-11-26 | 青岛理工大学 | Accurate data acquisition method and device for rock-socketed tubular pile horizontal loading p-y curve method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248558A (en) * | 1998-03-05 | 1999-09-17 | Nippon Telegr & Teleph Corp <Ntt> | Measuring method for strain distribution |
| CN103512686A (en) * | 2013-10-12 | 2014-01-15 | 青岛理工大学 | Static pressure high-strength prestressed concrete pipe pile body stress testing device |
| CN103759666A (en) * | 2014-01-13 | 2014-04-30 | 河海大学 | Device and method for monitoring pile body strain of round solid pile |
| CN103759665A (en) * | 2014-01-13 | 2014-04-30 | 河海大学 | Distributed measurement device and method of pile body deformation of cast-in-place X-type pile |
| CN104897321A (en) * | 2015-06-24 | 2015-09-09 | 潍坊学院 | Prefabricated opening concrete tubular pile body inner wall shearing strength testing device and method |
| CN206233273U (en) * | 2016-04-05 | 2017-06-09 | 王永洪 | A kind of pile for prestressed pipe Internal forces test device for being implanted into steel bar stress |
-
2016
- 2016-04-05 CN CN201610205523.9A patent/CN105696635A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248558A (en) * | 1998-03-05 | 1999-09-17 | Nippon Telegr & Teleph Corp <Ntt> | Measuring method for strain distribution |
| CN103512686A (en) * | 2013-10-12 | 2014-01-15 | 青岛理工大学 | Static pressure high-strength prestressed concrete pipe pile body stress testing device |
| CN103759666A (en) * | 2014-01-13 | 2014-04-30 | 河海大学 | Device and method for monitoring pile body strain of round solid pile |
| CN103759665A (en) * | 2014-01-13 | 2014-04-30 | 河海大学 | Distributed measurement device and method of pile body deformation of cast-in-place X-type pile |
| CN104897321A (en) * | 2015-06-24 | 2015-09-09 | 潍坊学院 | Prefabricated opening concrete tubular pile body inner wall shearing strength testing device and method |
| CN206233273U (en) * | 2016-04-05 | 2017-06-09 | 王永洪 | A kind of pile for prestressed pipe Internal forces test device for being implanted into steel bar stress |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130598A (en) * | 2017-06-07 | 2017-09-05 | 安徽省建筑科学研究设计院 | A kind of glass fibre rib concrete pile containing optical fiber |
| CN113702158A (en) * | 2021-08-31 | 2021-11-26 | 青岛理工大学 | Accurate data acquisition method and device for rock-socketed tubular pile horizontal loading p-y curve method |
| CN113702158B (en) * | 2021-08-31 | 2024-03-22 | 青岛理工大学 | Method and device for accurately collecting data of horizontal loading p-y curve method of rock-socketed pipe pile |
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Application publication date: 20160622 |