CN106087696A - A kind of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density monitoring method utilizing piezoceramic transducer - Google Patents
A kind of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density monitoring method utilizing piezoceramic transducer Download PDFInfo
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- CN106087696A CN106087696A CN201610429053.4A CN201610429053A CN106087696A CN 106087696 A CN106087696 A CN 106087696A CN 201610429053 A CN201610429053 A CN 201610429053A CN 106087696 A CN106087696 A CN 106087696A
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- steel pipe
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention provides a kind of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density monitoring method utilizing piezoceramic transducer, belong to civil engineering works structure health monitoring field.By support, piezoelectric ceramics annulus sensor is laid in Filled Steel Tubular Arch Bridge steel pipe central authorities；Multiple piezoelectric ceramic piece sensors are pasted on Filled Steel Tubular Arch Bridge outer wall of steel pipe, the steel pipe pasted at piezoelectric ceramic piece sensor is done insulation processing；Using piezoelectric ceramics annulus sensor as excitation end during use, launch signal；Using piezoelectric ceramic piece sensor as signal receiving end, receive signal；The principle of the invention is simple, sensor is laid convenient, with low cost, do not interfere with original structure performance, simple operation, it is capable of the monitoring of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density in work progress, peel off the monitoring of situation during can also being applied to be on active service between inner concrete and steel pipe, there is future in engineering applications well.
Description
Technical field
The present invention relates to a kind of Filled Steel Tubular Arch Bridge concrete filled steel tube utilizing piezoceramic transducer and be in the milk close
Reality monitoring method, it is adaptable to the monitoring of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density, belongs to civil engineering
Monitoring structural health conditions field.
Background technology
CFST Arch Bridge belongs to the one in steel concrete combinative structure.CFST Arch Bridge is by steel pipe
Interior fill concrete, limits the expansion of pressurized concrete due to the radial constraint of steel pipe, makes concrete be in three dimension stress shape
State, thus significantly improve the comprcssive strength of concrete.Concrete filled steel tube has that bearing capacity is high, ductility is good, and anti-seismic performance is excellent
The advantages such as more, fire resistance is good, and resistance to corrosion is strong.Steel pipe has lengthways main steel bar and the effect of horizontal cuff concurrently, at the same time as executing
Work template, facilitates concreting, and in work progress, steel pipe can be as stiffness load-bearing skeleton, and its welding job is simple, lifting weight
Amount is light, it is thus possible to simplify construction technology, shortens the construction period.Owing to concrete filled steel tube has ordinary reinforced concrete structure
Incomparable advantage so that CFST Arch Bridge is increasingly widely applied in science of bridge building.At Practical Project
In, maximum CFST Arch Bridge single hole has reached more than 500 meters across footpath.Concrete in Filled Steel Tubular Arch Bridge steel pipe
Perfusion uses jack-block technique, and after arch rib steel pipe inner concrete jacking to certain altitude, concrete can be little with the angle of steel pipe walls
In air critical escape angle, when concrete Free Surface is when steel pipe inner top surface is close, and air is easily by concrete Free Surface
Wave or surge and seal and form air cavity, causes the cavity within concrete filled steel tube.Grouting leakiness during actual survey
Frequently occur in arch crown part, and grouting plumpness is generally higher than 50%.When having cavity defect inside concrete filled steel tube, can make
Become concrete filled steel tube bearing capacity and the decline of rigidity, and due to the irregular appearance of concrete filled steel tube cavity interface shape
Easily cause the eccentric compression of structure, reduce the stability of structure, so for Filled Steel Tubular Arch Bridge in Practical Project
The monitoring of concrete filled steel tube grouting density is critically important.
At present the main method of Filled Steel Tubular Arch Bridge filling concrete density monitoring is had: artificial hammering method,
Impact echo, ultrasonic detection.
Owing to piezoceramic material has direct piezoelectric effect and inverse piezoelectric effect, can not only be used for sensor again can be as start
Device, so being used widely in monitoring structural health conditions field.The present invention makes full use of the direct piezoelectric effect of piezoceramic material
And inverse piezoelectric effect, by reasonably arranging piezoceramic transducer, and combine wave theory and can realize concrete-filled steel tube arch
The monitoring of bridge arch fin steel tube concrete grouting density.
Summary of the invention
In order to enable piezoceramic material to better adapt to the version of Filled Steel Tubular Arch Bridge steel pipe, this
Bright employing piezoelectric ceramics annulus sensor and piezoelectric ceramic piece sensor, it is possible to realize Filled Steel Tubular Arch Bridge steel tube concrete
The monitoring of the different grouting degree of soil, has future in engineering applications well.
Technical scheme:
A kind of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density monitoring side utilizing piezoceramic transducer
Method, step is as follows: by support, piezoelectric ceramics annulus sensor is laid in Filled Steel Tubular Arch Bridge steel pipe central authorities；Will pressure
Electroceramics sheet sensor is pasted on Filled Steel Tubular Arch Bridge outer wall of steel pipe, to the steel pipe pasted at piezoelectric ceramic piece sensor
Do insulation processing；Using piezoelectric ceramics annulus sensor as excitation end during use, launch signal；Piezoelectric ceramic piece sensor is made
For signal receiving end, receive signal；Monitoring device includes computer, data collecting card and power amplifier；
Described piezoelectric ceramics annulus sensor includes piezoelectric ceramics annulus, waterproof anti-electrocoat, coating for EMI shielding, water
Cement mortar protective layer and wire, at the both positive and negative polarity welding lead of piezoelectric ceramics annulus, be welded with the piezoelectric ceramics annulus of wire
One layer of waterproof anti-electrocoat of surface coating, applies coating for EMI shielding at waterproof anti-electric coating outer surface, at coating for EMI shielding
Outer joints cement mortar cover i.e. forms piezoelectric ceramics annulus sensor.
Filled Steel Tubular Arch Bridge steel pipe is laid four piezoelectric ceramic piece sensors, respectively at steel pipe top, the end
Portion and middle and upper part, both sides；When Filled Steel Tubular Arch Bridge steel pipe is carried out concrete grouting, piezoelectric ceramics annulus is passed simultaneously
Sensor encourages, piezoelectric ceramic piece sensor receive signal, calculates the energy receiving signal；When not irrigating coagulation to steel pipe
Owing to transmitting stress wave without medium between piezoelectric ceramics annulus sensor and piezoelectric ceramic piece sensor during soil, piezoelectric ceramic piece passes
It is zero that sensor receives the energy of signal；When grouting is to when reaching steel tube section half, piezoelectric ceramics annulus sensor and bottom
Be full of concrete medium between piezoelectric ceramic piece sensor, piezoelectric ceramics annulus sensor excitation the stress wave signal produced leads to
Cross concrete medium to be received by the piezoelectric ceramic piece sensor of bottom, the letter that now the piezoelectric ceramic piece sensor of bottom receives
Number energy presents suddenly acutely increase, and reflection grouting is to reaching steel tube section half；When grouting proceeds, concrete is full of pressure
Time between electroceramics annulus sensor and middle and upper part piezoelectric ceramic piece sensor, now piezoelectric ceramic piece sensor in middle and upper part receives
To signal energy can present suddenly acutely increase, thus reflect that grouting reaches the position at piezoelectric ceramic piece sensor place；When
Grouting proceeds, when concrete is full of whole steel pipe, and the signal energy meeting that now top piezoelectric potsherd sensor receives
Suddenly present acutely increase, thus reflect that grouting is the fullest.In addition by changing the position of middle and upper part piezoelectric ceramic piece sensor
Put or rationally the laying quantity of increase piezoelectric ceramic piece sensor can realize being in the milk 50% to full arbitrary extent of being in the milk
Monitoring.
Beneficial effects of the present invention:
(1) piezoceramic transducer arrangement form is simple, easy for installation, can quickly lay.
(2) compared with Common piezoelectricity ceramic sensor element, the power of piezoelectric ceramics annulus sensor emission signal is big, it is possible to make
Stress wave propagation farther, is more suitable for the feature that Filled Steel Tubular Arch Bridge steel pipe sizes is big, steel pipe thickness is big, and with mixed
The solidifying soil material compatibility is good, does not affect original structure performance.
(3) present invention use piezoceramic transducer and distribution method overcome conventional piezoelectric ceramic sensor element can only edge
Single direction excitation and the shortcoming gathering signal；Contrast traditional approach can reduce the laying quantity of internal sensor, strengthens real
The property used.
(4) can be not only used for the monitoring of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density in work progress, also
The monitoring of situation of coming to nothing is peeled off between concrete and steel pipe during can be used for being on active service.
(5) low cost, respond fast, simple to operate, be easy to mass application.
Accompanying drawing explanation
Fig. 1 is that the piezoceramic transducer of the present invention lays mode figure.
Fig. 2 (a)-Fig. 2 (d) is the monitoring principle figure when arch rib steel pipe difference grouting degree of the present invention.
In figure: the piezoelectric ceramic piece sensor at 1 top；The piezoelectric ceramic piece sensor of 2 middle and upper parts；Piezoelectricity pottery bottom 3
Ceramics sensor；4 arch rib steel pipes；5 piezoelectric ceramics annulus sensors；6 supports；7 concrete.
Detailed description of the invention
Below in conjunction with accompanying drawing and technical scheme, further illustrate the detailed description of the invention of the present invention.
The invention provides a kind of Filled Steel Tubular Arch Bridge concrete filled steel tube utilizing piezoceramic transducer to be in the milk
Density monitoring method, specific embodiments is as follows:
Different size, the piezoelectric ceramics annulus sensor of specification and piezoelectric ceramic piece sensing is chosen according to actual requirement of engineering
Device, at the both positive and negative polarity welding lead of piezoelectric ceramics annulus sensor, is laid in steel pipe by support after it is carried out protection and mixes
Solidifying soil arch rib steel pipe is central；Piezoelectric ceramic piece sensor is rationally pasted on Filled Steel Tubular Arch Bridge outer wall of steel pipe,
And carry out the insulation measures with steel pipe.Using piezoelectric ceramics annulus sensor as excitation end during use, launch signal；Steel pipe is mixed
Solidifying soil arch rib outer wall of steel pipe piezoelectric ceramic piece sensor, as signal receiving end, receives signal.Monitoring device includes: electricity
Brain, data collecting card and power amplifier.
Monitoring flow process is as follows:
At Filled Steel Tubular Arch Bridge steel pipe key position, such as vault, lay piezoceramic transducer by Fig. 1 mode；
Arch rib steel pipe is carried out concrete grouting operation, piezoelectric ceramics annulus sensor is encouraged, by arch rib outer wall of steel pipe simultaneously
Piezoelectric ceramic piece sensor receives signal, calculates the signal energy received.Due to piezoelectricity when not to steel pipe concrete perfusion
Stress wave is transmitted without medium, so piezoelectric ceramic piece sensor receives between pottery annulus sensor and piezoelectric ceramic piece sensor
To signal energy be zero；When grouting proceeds, when grouting reaches half, piezoelectric ceramics annulus sensor and bottom piezoelectricity pottery
Be full of concrete medium between ceramics sensor, piezoelectric ceramics annulus sensor excitation the stress wave signal produced can pass through
Concrete medium is received by bottom piezoelectric ceramic piece sensor, the signal energy that now bottom piezoelectric ceramic piece sensor receives
Acutely increase can be presented suddenly, thus reflect that grouting reaches half；When grouting proceeds, concrete is full of piezoelectric ceramics annulus
Time between sensor and middle and upper part piezoelectric ceramic piece sensor, the signal energy that now piezoelectric ceramic piece sensor in middle and upper part receives
Amount can present suddenly acutely increase, thus reflects that grouting reaches the position at piezoelectric ceramic piece sensor place；When grouting continue into
OK, when concrete is full of whole steel pipe, the signal energy that now top piezoelectric potsherd sensor receives can present suddenly play
Strong increase, thus reflect that grouting is the fullest.In addition by changing the position or rationally of middle and upper part piezoelectric ceramic piece sensor
The laying quantity increasing piezoelectric ceramic piece sensor can realize being in the milk 50% to the arbitrary extent monitoring being in the milk full.To sum up institute
State, when the signal energy that outer wall of steel pipe piezoelectric ceramic piece sensor receives presents and acutely increases, i.e. it is believed that irrigate coagulation
Soil arrives the installation position of this piezoelectric ceramic piece sensor.Therefore, by Reasonable Arrangement piezoceramic transducer, this method is permissible
Realize the arbitrary extent monitoring full to Filled Steel Tubular Arch Bridge concrete filled steel tube grouting 50% to grouting.
The present invention compared with prior art has the following advantages: transducer arrangements is simple, launch signal power greatly and concrete
Structural compatibility is good, easy to operate, can be not only used for concrete during work progress grouting density monitoring may be used in again
The condition monitoring that comes to nothing is peeled off with steel pipe.Additionally, actual for concrete engineering, different size, different size, different number can be chosen
The piezoceramic transducer of amount is by reasonably laying mode, it is achieved Filled Steel Tubular Arch Bridge concrete grouting density
Monitoring, to adapt to requirement of engineering.
Claims (2)
1. utilize a Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density monitoring method for piezoceramic transducer,
It is characterized in that, step is as follows: by support, piezoelectric ceramics annulus sensor is laid in Filled Steel Tubular Arch Bridge steel pipe
Central authorities；Several piezoelectric ceramic piece sensors are pasted on Filled Steel Tubular Arch Bridge outer wall of steel pipe, to pasting piezoelectric ceramics
Steel pipe at sheet sensor does insulation processing；Using piezoelectric ceramics annulus sensor as excitation end during use, launch signal；Will pressure
Electroceramics sheet sensor, as signal receiving end, receives signal；Monitoring device includes computer, data collecting card and power amplification
Device；
Described piezoelectric ceramics annulus sensor includes piezoelectric ceramics annulus, waterproof anti-electrocoat, coating for EMI shielding, cement bonded sand
Slurry protective layer and wire, at the both positive and negative polarity welding lead of piezoelectric ceramics annulus, be welded with the piezoelectric ceramics ring textures of wire
Apply one layer of waterproof anti-electrocoat, apply coating for EMI shielding at waterproof anti-electric coating outer surface, water outside coating for EMI shielding
Build cement mortar protective course and i.e. form piezoelectric ceramics annulus sensor.
Filled Steel Tubular Arch Bridge concrete filled steel tube the most according to claim 1 grouting density monitoring method, it is special
Levy and be, lay four piezoelectric ceramic piece sensors at Filled Steel Tubular Arch Bridge outer wall of steel pipe, respectively at steel pipe top, the end
Portion and middle and upper part, both sides；When Filled Steel Tubular Arch Bridge steel pipe is carried out concrete grouting, piezoelectric ceramics annulus is passed simultaneously
Sensor encourages, piezoelectric ceramic piece sensor receive signal, calculates the energy receiving signal；When not irrigating coagulation to steel pipe
Owing to transmitting stress wave without medium between piezoelectric ceramics annulus sensor and piezoelectric ceramic piece sensor during soil, piezoelectric ceramic piece passes
It is zero that sensor receives the energy of signal；When grouting is to when reaching steel tube section half, piezoelectric ceramics annulus sensor and bottom
Be full of concrete medium between piezoelectric ceramic piece sensor, piezoelectric ceramics annulus sensor excitation the stress wave signal produced leads to
Cross concrete medium to be received by the piezoelectric ceramic piece sensor of bottom, the letter that now the piezoelectric ceramic piece sensor of bottom receives
Number energy presents suddenly acutely increase, and reflection grouting is to reaching steel tube section half；When grouting proceeds, concrete is full of pressure
Time between electroceramics annulus sensor and middle and upper part piezoelectric ceramic piece sensor, now the piezoelectric ceramic piece sensor of middle and upper part connects
The signal energy received presents suddenly acutely increase, and reflection grouting reaches the position at piezoelectric ceramic piece sensor place；Work as grouting
Proceeding, when concrete is full of whole steel pipe, the signal energy that now the piezoelectric ceramic piece sensor at top receives is unexpected
Presenting acutely increase, reflection grouting is the fullest.
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| CN201610429053.4A CN106087696B (en) | 2016-06-15 | 2016-06-15 | A kind of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density monitoring method using piezoceramic transducer |
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| CN201610429053.4A CN106087696B (en) | 2016-06-15 | 2016-06-15 | A kind of Filled Steel Tubular Arch Bridge concrete filled steel tube grouting density monitoring method using piezoceramic transducer |
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| CN106087696B CN106087696B (en) | 2018-02-16 |
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Cited By (6)
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|---|---|---|---|---|
| CN107237249A (en) * | 2017-05-05 | 2017-10-10 | 长沙理工大学 | A kind of precast assembly box arch rib and its damage detecting method |
| CN107529614A (en) * | 2017-09-29 | 2018-01-02 | 长安大学 | A kind of health monitoring systems and method of prefabricated assembling type reinforced sleeve connector |
| CN108226230A (en) * | 2018-01-05 | 2018-06-29 | 宁波大学 | A kind of reinforced bar sleeve grouting material compactness defect inspection method based on Piezoelectric Impedance effect |
| CN109371857A (en) * | 2018-11-15 | 2019-02-22 | 广西大学 | A kind of hardened system that CFST Arch Bridge unsticking is come to nothing and its construction method |
| CN110455914A (en) * | 2019-08-16 | 2019-11-15 | 哈尔滨全感科技有限公司 | Be in the milk condition detection method inside grout sleeve based on built-in piezo ceramic element |
| CN111579355A (en) * | 2020-06-18 | 2020-08-25 | 湖北震泰建设工程质量检测有限责任公司 | Concrete cast-in-place pile static load test unbalance loading monitoring method based on piezoelectric impedance frequency shift |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237249A (en) * | 2017-05-05 | 2017-10-10 | 长沙理工大学 | A kind of precast assembly box arch rib and its damage detecting method |
| CN107529614A (en) * | 2017-09-29 | 2018-01-02 | 长安大学 | A kind of health monitoring systems and method of prefabricated assembling type reinforced sleeve connector |
| CN107529614B (en) * | 2017-09-29 | 2024-03-29 | 长安大学 | Health monitoring system and method for prefabricated assembled steel bar sleeve connecting piece |
| CN108226230A (en) * | 2018-01-05 | 2018-06-29 | 宁波大学 | A kind of reinforced bar sleeve grouting material compactness defect inspection method based on Piezoelectric Impedance effect |
| CN109371857A (en) * | 2018-11-15 | 2019-02-22 | 广西大学 | A kind of hardened system that CFST Arch Bridge unsticking is come to nothing and its construction method |
| CN110455914A (en) * | 2019-08-16 | 2019-11-15 | 哈尔滨全感科技有限公司 | Be in the milk condition detection method inside grout sleeve based on built-in piezo ceramic element |
| CN111579355A (en) * | 2020-06-18 | 2020-08-25 | 湖北震泰建设工程质量检测有限责任公司 | Concrete cast-in-place pile static load test unbalance loading monitoring method based on piezoelectric impedance frequency shift |
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| CN106087696B (en) | 2018-02-16 |
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