CN105926683A - Novel method for detecting pile foundation post-grouting quality by using distributed optical fiber temperature measurement technology - Google Patents
Novel method for detecting pile foundation post-grouting quality by using distributed optical fiber temperature measurement technology Download PDFInfo
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- CN105926683A CN105926683A CN201610250398.3A CN201610250398A CN105926683A CN 105926683 A CN105926683 A CN 105926683A CN 201610250398 A CN201610250398 A CN 201610250398A CN 105926683 A CN105926683 A CN 105926683A
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- optical fiber
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- temperature
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005516 engineering process Methods 0.000 title abstract description 13
- 238000009529 body temperature measurement Methods 0.000 title abstract description 7
- 239000002689 soil Substances 0.000 claims abstract description 31
- 230000002787 reinforcement Effects 0.000 claims abstract description 19
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 238000007569 slipcasting Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 18
- 210000003205 muscle Anatomy 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 230000036760 body temperature Effects 0.000 abstract 1
- 239000011440 grout Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 11
- 239000011083 cement mortar Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- 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)
- Piles And Underground Anchors (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The novel method for detecting the pile foundation post grouting quality by using the distributed optical fiber temperature measurement technology comprises the following steps: (1) installing a sensing temperature measuring optical fiber: fixing a sensing temperature measurement optical fiber with a hydraulic cylinder or a pneumatic cylinder on a main rib of the reinforcement cage, wherein the sensing temperature measurement optical fiber is arranged in a U-shaped structure and is arranged from the bottom of the reinforcement cage to the upper part in a full length manner; (2) installing a reinforcement cage; (3) and ejecting out the sensing temperature measuring optical fiber: the sensing temperature measuring optical fiber is pushed out by a hydraulic cylinder or a pneumatic cylinder, and the pushed sensing temperature measuring optical fiber is contacted with the hole wall of the cast-in-place pile; (4) pouring concrete into the pile hole of the cast-in-place pile; (5) after the concrete reaches 70% or more of the designed strength, reading the soil temperature value of the full depth before grouting by using an acquisition instrument; (6) grouting; (7) after grouting, after curing and reinforcing, reading the soil body temperature value of the full depth after grouting by using an acquisition instrument; the distribution state of the grout in the soil body on the pile side can be obtained by comparing the temperature values before and after grouting.
Description
Technical field
The present invention relates to a kind of application distribution Fiber Optic Pyrometer detection of pier foundation post jacking quality
New method, belong to bridge pile foundation detection field, in particular to pile foundation engineering implement
After pile foundation post-grouting technology, use distributed optical fiber temperature measurement technology that its grouting result is evaluated
A kind of method.
Background technology
Pile foundation post-grouting technology can play cementing solid by the soil body injection to stake end and stake side
The serosity of change effect, strengthens, solidifies stake end and the soil body of stake side, be effectively reduced stake long, carry
HT pile bearing capacity, reduces pile body settling amount, and reduction of erection time, the engineering of reduction bored concrete pile are made
The advantages such as valency, pile foundation post-grouting technology is with the obvious advantage, and application prospect is good, in recent years traffic,
The fields such as building, water conservancy are widely applied.
Belonging to concealed work yet with pile foundation, pile foundation post grouting construction quality is difficult to sentence
Disconnected, geological conditions complicates more, slurry formula set in advance during slip casting, grouting pressure,
Mud jacking amount is after mud jacking operation is implemented, and the evaluation difficulty of its concrete grouting result is very big, up till now
Mainly evaluate whether stake meets design requirement, the method by measurement ultimate bearing capacity of single pile
A part can only be randomly drawed and carry out representative detection, it is impossible to be applicable to high-volume pile foundation slip casting effect
The evaluation of fruit, and cannot directly grouting result be evaluated, can only indirectly reflect that mud jacking is imitated
Really.In existing detection means, for the consolidation effect of serosity bottom pile body and in pile peripheral earth,
Not yet there is preferable quality detection method at present.
The present invention is directed to this problem, propose to use distributed optical fiber temperature measurement technology, utilize hydraulic pressure or
The method for designing of person's air pressure liftout attachment, can be to the grouting result of pile foundation post-grouting technology, slurry
Liquid distribution situation in the soil body detects, thus provides for evaluating the effect of pile foundation post jacking
Detection data.Otherwise for the construction characteristic of pile foundation, the liftout attachment of hydraulic pressure or air pressure is utilized to set
Meter method, is greatly improved the effect that contacts of distribution type fiber-optic and hole wall, thus improves certainty of measurement
And accuracy.
Summary of the invention
In order to solve the defect that existing pile foundation post grouting construction quality is difficult to judge, the present invention
There is provided a kind of to be realized stake week variations in temperature before and after mud jacking by distributed optical fiber temperature measurement technology
Detecting in real time and be accurately positioned, the application distribution optical fiber detecting pile foundation grouting result is surveyed
The new method of temperature technique detection of pier foundation post jacking quality.
The technical solution used in the present invention is:
The new method of application distribution Fiber Optic Pyrometer detection of pier foundation post jacking quality, its feature
It is: comprise the steps:
(1), sensing temperature-measuring optical fiber is installed: by the sensing temperature-measuring optical fiber of band hydraulic cylinder or pneumatic cylinder
It is fixed on the main muscle of steel reinforcement cage, described sensing temperature-measuring optical fiber and hydraulic cylinder or the work of pneumatic cylinder
Stopper rod is fixing to be connected, and the signal input part that gathers of outside Acquisition Instrument connects sensing temperature-measuring optical fiber
Outfan；The described sensing temperature-measuring optical fiber structure that takes the shape of the letter U is arranged, and from the bottom of steel reinforcement cage
Start the most elongated layout；Measure cable, hydraulic tube or pneumatic tube and be bundled in main muscle by steel wire
Other；
(2), steel reinforcement cage is installed: in the stake holes of the bored concrete pile dug in advance, fixedly mount reinforcing bar
Cage, described steel reinforcement cage includes being vertically arranged by many and between the main muscle of circular array and level
Every the multiple hoop stirrups being welded in main ribs；
(3), sensing the ejecting of temperature-measuring optical fiber: after steel reinforcement cage is in place, utilize hydraulic cylinder or
Sensing temperature-measuring optical fiber is ejected by pneumatic cylinder, the sensing temperature-measuring optical fiber after ejecting and the hole wall of bored concrete pile
Contact；
(4) toward casting concrete in the stake holes of bored concrete pile；
(5), after concrete reaches the 70% or above of design strength, Acquisition Instrument is utilized to read
The soil temperature value of the full degree of depth before slip casting；
(6), slip casting；
(7), slip casting terminates, after maintenance is reinforced, after recycling Acquisition Instrument reading slip casting entirely
The soil temperature value of the degree of depth；Serosity can be obtained in stake side by the contrast of temperature value before and after slip casting
Distribution in the soil body.
Described sensing temperature-measuring optical fiber is temperature sensor.
Described hydraulic cylinder or pneumatic cylinder are fixed on main muscle by fixed support.
Pile foundation post-grouting technology refers at bored pile piling and after reaching some strength, by advance
It is embedded in the madjack pipe in stake week or pile body, uses high-pressure injection pump can play cementation solidifying
In the serosity jacked pile end soil layer of effect and pile peripheral earth, thus sediment of the hole bottom, bearing course at pile end
Utilize the infiltration of serosity, filling, densification with mud cake around pile, cleave and the effect such as consolidation, change
The physical property of original soil body and mechanical state, make the intensity of pile-end soil and Pile side soil be improved,
Improve end resistance and frictional force in side-pile, and then the settling amount of reduction stake to varying degrees, carry
The bearing capacity of high stake.
The present invention is positioned at pile body and undisturbed soil by the artificial post jacking liquid temp that improves, detection afterwards
The temperature of distributed sensing temperature-measuring optical fiber change before and after slip casting at faying face, utilizes distributed
The light wave that scattering is returned by sensing temperature-measuring optical fiber, after wavelength-division multiplex, detection demodulation, sends into signal
Temperature signal just can be shown by processing system in real time, and by the transmission speed of light wave in optical fiber
The time of degree and dorsad optical echo to these Information locatings, thus can accurately test out anti-slurry and reached
The height arrived, thus reflect the grouting result of cement mortar.
During pile foundation post jacking, outside the mud skin soil in the above certain altitude of stake end is with mud skin soil
The soil body enclosed is filled with cement mortar in one fixed width scope, and then affects its pressure to pile body,
Improve pile side resistance, also make its temperature promote with the injection of cement mortar simultaneously, use and divide
Cloth Fiber Optic Pyrometer can detect the said temperature change at optical fiber (cable) cloth set direction,
Thus release serosity and in the distribution in stake week and counter starch highly, evaluate slip casting with this and is rubbed in stake side
The improvement effect of resistance.
Beneficial effects of the present invention is embodied in:
1, compared with existing detection method, sensing temperature-measuring optical fiber (cable) itself is directly as quick
Sensing unit, not only sense temperature information but also transmit temperature information, can obtain arbitrarily survey as required
The temperature information of temperature aspect optional position, is not restricted by concrete point for measuring temperature, by perception temperature
Pile foundation post jacking spatial distribution state can accurately be measured and monitor in real time by degree change, inspection
Survey efficiency is greatly improved.
2, easy for installation, use fluid pressure type extrusion method or cylinder ejector device method for designing, dress
Put simple and firm, it is simple to on-the-spot construction.
Accompanying drawing explanation
Fig. 1 a is that the present invention ejects forward pass sensing temperature fiber device structural representation.
Fig. 1 b is sensing temperature-measuring optical fiber apparatus structure schematic diagram after the present invention ejects.
Fig. 2 is steel reinforcement cage cross-sectional view of the present invention.
Fig. 3 is Fig. 2 Section A-A figure.
Fig. 4 is Fig. 2 section B-B figure.
Fig. 5 is that the present invention senses temperature-measuring optical fiber device and ejects front schematic diagram.
Fig. 6 is that the present invention senses temperature-measuring optical fiber device and ejects rear schematic diagram.
Fig. 7 is that the technology of the present invention implements schematic diagram.
Detailed description of the invention
With reference to Fig. 1 a to Fig. 7, application distribution Fiber Optic Pyrometer detection of pier foundation post jacking matter
The new method of amount, comprises the steps:
(1), sensing temperature-measuring optical fiber is installed: by the sensing temperature measuring optical of band hydraulic cylinder or pneumatic cylinder 2
Fine 1 is fixed on the main muscle 51 of steel reinforcement cage 5, described sensing temperature-measuring optical fiber 1 and hydraulic cylinder
Or the fixing connection of piston rod 21 of pneumatic cylinder 2, the collection signal input of outside Acquisition Instrument 7
End connects the outfan of sensing temperature-measuring optical fiber 1；Described sensing temperature-measuring optical fiber 1 takes the shape of the letter U structure
Arrange, and start the most elongated layout from the bottom of steel reinforcement cage 5；Measure cable, hydraulic tube
Or pneumatic tube 4 is bundled in main muscle 51 side by steel wire；
(2), steel reinforcement cage is installed: in the stake holes of the bored concrete pile dug in advance, fixedly mount reinforcing bar
Cage 5, described steel reinforcement cage 5 includes being vertically arranged by many and the main muscle 51 of circular array
The multiple hoop stirrups 52 being welded in main ribs with horizontal interval；
(3), ejecting of temperature-measuring optical fiber is sensed: after steel reinforcement cage 5 is in place, utilize hydraulic cylinder
Or sensing temperature-measuring optical fiber 1 is ejected by pneumatic cylinder 2, the sensing temperature-measuring optical fiber 1 after ejecting and perfusion
The hole wall 6 of stake contacts；
(4) toward casting concrete in the stake holes of bored concrete pile；
(5), after concrete reaches the 70% or above of design strength, Acquisition Instrument 7 is utilized
The soil temperature value of the full degree of depth before reading slip casting；
(6), slip casting；
(7), slip casting terminates, after maintenance is reinforced, after recycling Acquisition Instrument reading slip casting entirely
The soil temperature value of the degree of depth；Serosity can be obtained in stake side by the contrast of temperature value before and after slip casting
Distribution in the soil body.
Described sensing temperature-measuring optical fiber 1 is temperature sensor.
Described hydraulic cylinder or pneumatic cylinder 2 are fixed on main muscle 51 by fixed support 3.
Pile foundation post-grouting technology refers at bored pile piling and after reaching some strength, by advance
It is embedded in the madjack pipe in stake week or pile body, uses high-pressure injection pump can play cementation solidifying
In the serosity jacked pile end soil layer of effect and pile peripheral earth, thus sediment of the hole bottom, bearing course at pile end
Utilize the infiltration of serosity, filling, densification with mud cake around pile, cleave and the effect such as consolidation, change
The physical property of original soil body and mechanical state, make the intensity of pile-end soil and Pile side soil be improved,
Improve end resistance and frictional force in side-pile, and then the settling amount of reduction stake to varying degrees, carry
The bearing capacity of high stake.
The present invention is positioned at pile body and undisturbed soil by the artificial post jacking liquid temp that improves, detection afterwards
The temperature of distributed sensing temperature-measuring optical fiber change before and after slip casting at faying face, utilizes distributed
The light wave that scattering is returned by sensing temperature-measuring optical fiber, after wavelength-division multiplex, detection demodulation, sends into signal
Temperature signal just can be shown by processing system in real time, and by the transmission speed of light wave in optical fiber
The time of degree and dorsad optical echo to these Information locatings, thus can accurately test out anti-slurry and reached
The height arrived, thus reflect the grouting result of cement mortar.
During pile foundation post jacking, outside the mud skin soil in the above certain altitude of stake end is with mud skin soil
The soil body enclosed is filled with cement mortar in one fixed width scope, and then affects its pressure to pile body,
Improve pile side resistance, also make its temperature promote with the injection of cement mortar simultaneously, use and divide
Cloth Fiber Optic Pyrometer can detect the said temperature change at optical fiber (cable) cloth set direction,
Thus release serosity and in the distribution in stake week and counter starch highly, evaluate slip casting with this and is rubbed in stake side
The improvement effect of resistance.
It is only the specific embodiment of the present invention finally it should be noted that listed above.Aobvious
So, the invention is not restricted to above example, it is also possible to have many variations.The common skill of this area
All deformation that art personnel can directly derive from present disclosure or associate, all should
It is considered protection scope of the present invention.
Claims (3)
1. the new method of application distribution Fiber Optic Pyrometer detection of pier foundation post jacking quality, its
It is characterised by: comprise the steps:
(1), sensing temperature-measuring optical fiber is installed: by the sensing temperature-measuring optical fiber of band hydraulic cylinder or pneumatic cylinder
It is fixed on the main muscle of steel reinforcement cage, described sensing temperature-measuring optical fiber and hydraulic cylinder or the work of pneumatic cylinder
Stopper rod is fixing to be connected, and the signal input part that gathers of outside Acquisition Instrument connects sensing temperature-measuring optical fiber
Outfan；The described sensing temperature-measuring optical fiber structure that takes the shape of the letter U is arranged, and from the bottom of steel reinforcement cage
Start the most elongated layout；Measure cable, hydraulic tube or pneumatic tube and be bundled in main muscle by steel wire
Other；
(2), steel reinforcement cage is installed: in the stake holes of the bored concrete pile dug in advance, fixedly mount reinforcing bar
Cage, described steel reinforcement cage includes being vertically arranged by many and between the main muscle of circular array and level
Every the multiple hoop stirrups being welded in main ribs；
(3), sensing the ejecting of temperature-measuring optical fiber: after steel reinforcement cage is in place, utilize hydraulic cylinder or
Sensing temperature-measuring optical fiber is ejected by pneumatic cylinder, the sensing temperature-measuring optical fiber after ejecting and the hole wall of bored concrete pile
Contact；
(4) toward casting concrete in the stake holes of bored concrete pile；
(5), after concrete reaches the 70% or above of design strength, Acquisition Instrument is utilized to read
The soil temperature value of the full degree of depth before slip casting；
(6), slip casting；
(7), slip casting terminates, after maintenance is reinforced, after recycling Acquisition Instrument reading slip casting entirely
The soil temperature value of the degree of depth；Serosity can be obtained in stake side by the contrast of temperature value before and after slip casting
Distribution in the soil body.
2. press after application distribution Fiber Optic Pyrometer detection of pier foundation as claimed in claim 1
The new method of slurry quality, it is characterised in that: described sensing temperature-measuring optical fiber is temperature sensor.
3. press after application distribution Fiber Optic Pyrometer detection of pier foundation as claimed in claim 2
The new method of slurry quality, it is characterised in that: described hydraulic cylinder or pneumatic cylinder pass through fixed support
It is fixed on main muscle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610250398.3A CN105926683B (en) | 2016-04-20 | 2016-04-20 | Method for detecting pile foundation post grouting quality by using distributed optical fiber temperature measurement technology |
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| CN201610250398.3A CN105926683B (en) | 2016-04-20 | 2016-04-20 | Method for detecting pile foundation post grouting quality by using distributed optical fiber temperature measurement technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107748179A (en) * | 2017-12-05 | 2018-03-02 | 湖北工业大学 | One kind determines method based on DTS detection perfusion pile integrality optical fiber heat effect radiuses |
| CN108678036A (en) * | 2018-06-14 | 2018-10-19 | 中国建筑第八工程局有限公司 | The detecting system installation method of the lateral soil pressure of bored concrete pile |
| CN108755787A (en) * | 2018-06-14 | 2018-11-06 | 中国建筑第八工程局有限公司 | The detecting system of the lateral soil pressure of bored concrete pile |
| CN109030561A (en) * | 2018-07-09 | 2018-12-18 | 大连理工大学 | A kind of pumping of prostressed duct compactness detection device and detection method based on distributed fiberoptic sensor |
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| CN105386473A (en) * | 2015-10-16 | 2016-03-09 | 浙江工业大学 | Method for detecting pile foundation post grouting quality based on multi-point ejection type sensor measurement technology |
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| CN103091359A (en) * | 2013-01-09 | 2013-05-08 | 湖北工业大学 | System for detecting integrity of grouting pile foundations based on distributed optical fiber temperature sensing technology |
| CN103485332A (en) * | 2013-09-26 | 2014-01-01 | 河海大学 | Construction method for precast energy pile |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748179A (en) * | 2017-12-05 | 2018-03-02 | 湖北工业大学 | One kind determines method based on DTS detection perfusion pile integrality optical fiber heat effect radiuses |
| CN108678036A (en) * | 2018-06-14 | 2018-10-19 | 中国建筑第八工程局有限公司 | The detecting system installation method of the lateral soil pressure of bored concrete pile |
| CN108755787A (en) * | 2018-06-14 | 2018-11-06 | 中国建筑第八工程局有限公司 | The detecting system of the lateral soil pressure of bored concrete pile |
| CN109030561A (en) * | 2018-07-09 | 2018-12-18 | 大连理工大学 | A kind of pumping of prostressed duct compactness detection device and detection method based on distributed fiberoptic sensor |
| CN109030561B (en) * | 2018-07-09 | 2023-10-27 | 大连理工大学 | Prestressed pipeline grouting compactness detection device and method based on distributed optical fiber sensor |
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