CN105223343B - A kind of vibrating sensor for detecting prefabricated concrete structure reinforced bar sleeve grouting plumpness - Google Patents
A kind of vibrating sensor for detecting prefabricated concrete structure reinforced bar sleeve grouting plumpness Download PDFInfo
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- CN105223343B CN105223343B CN201510679073.2A CN201510679073A CN105223343B CN 105223343 B CN105223343 B CN 105223343B CN 201510679073 A CN201510679073 A CN 201510679073A CN 105223343 B CN105223343 B CN 105223343B
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Abstract
The present invention relates to armored concrete technical field of quality detection, and in particular to a kind of vibrating sensor of detection prefabricated concrete structure reinforced bar sleeve grouting plumpness.A kind of vibrating sensor of detection prefabricated concrete structure reinforced bar sleeve grouting plumpness that the present invention is provided, closed shell including being provided with opening, the bottom of housing cavity is provided with piezoelectric ceramic piece, piezoelectric ceramic piece is connected with the side of elastomer, the opposite side of elastomer is connected with PCB, the opening of the housing is provided with embedding layer and carries out airtight waterproof, and the positive pole and negative pole of the piezoelectric ceramic piece are connected with the wire through embedding layer.The present invention can clearly tell sensor in atmosphere or in grouting material, according to the change of vibration period and amplitude, the damping vibration attenuation law of sensor is told, accurately judges whether whether post-grouting plumpness is filled or solidified to grouting material qualified in work progress.
Description
Technical field
The present invention relates to construction quality detection technique field, and in particular to one kind detection prefabricated concrete structure reinforcing bar set
The vibrating sensor of cylinder grouting plumpness.
Background technology
Prefabricated concrete structure, refers to the coagulation being assembled by reliable connected mode by precast concrete
Soil structure.Because it has energy-saving and environmental protection, saving template, improve execution conditions, raise labour productivity, accelerating construction progress etc.
Advantage, largely uses in Chinese one, the house construction engineering of tier 2 cities at present.In prefabricated concrete structure, reinforcing bar set
Cylinder grouting connection is a kind of conventional connected mode, and whether sleeve grouting is full, directly affects the shear resistance capacity of structure and anti-
Shake ability,《JGJ 1-2014 prefabricated concrete structure technical regulations》In, the standard of requirement specify that to component connection.Self-chambering
Since being applied at home with formula house, the detection method of grouting plumpness at present has been studied always in the industry, to reach control construction matter
The purpose of amount.But straight screw sleeve connection structure be multilayer dielectricity replace, as shown in figure 1, including first component 2, the first reinforcing bar 3,
Sleeve 4, the second reinforcing bar 5, wherein second component 6, slurry outlet 7 and injected hole 8, metal and nonmetal medium replace, and body is in footpath
To very thin thickness, generally 5mm or 6mm, existing engineering lossless detection method is caused to carry out effective detection to it.
The content of the invention
In order to overcome defect of the prior art, damping vibration attenuation principle of the present invention based on vibration to be filled using one kind detection
The vibrating sensor of plumpness of being in the milk with formula concrete structure reinforcing bars sleeve, resistance is vibrated according to sensor surrounding medium characteristic with it
The relation of Buddhist nun's decay judges the height of grouting material and the position relationship of sensor, and to reach grouting material in judging work progress be
It is no to be filled or solidify the whether qualified purpose of post-grouting plumpness.
The present invention is achieved through the following technical solutions：One kind detection prefabricated concrete structure reinforced bar sleeve grouting is full
The vibrating sensor of full scale, the vibrating sensor includes being provided with the closed shell of opening, and the bottom of the housing cavity is provided with
Piezoelectric ceramic piece, the piezoelectric ceramic piece is connected with the side of elastomer, and opposite side and the PCB of the elastomer connect
Connect, the opening of the housing is provided with embedding layer and carries out airtight waterproof, the positive pole and negative pole of the piezoelectric ceramic piece with pass through embedding
The wire connection of layer.
Further, the housing is cylinder.
Further, the diameter of the cylinder is less than 12mm, highly less than 6mm.
Further, a diameter of 10mm of the cylinder, is highly 3mm.
Further, a diameter of 8mm of the cylinder, is highly 2.5mm.
Compared with prior art, superior effect is：A kind of detection prefabricated concrete structure reinforcing bar that the present invention is provided
The vibrating sensor of sleeve grouting plumpness, disclosure satisfy that the quality of prefabricated concrete structure reinforced bar sleeve grouting construction process
The demand of the quick detection of the plumpness after control and grouting, with test speed is fast, efficiency high, high precision, stabilization and cost
Low advantage, for the prefabricated concrete structure construction quality accident work of effective detection means provides efficient detection equipment.
Brief description of the drawings
Fig. 1 is that straight screw sleeve connection structure is the sectional view of multilayer dielectricity alternating structure in the prior art；
Fig. 2 is the theoretical model schematic diagram of damping vibration principle of the invention；
Fig. 3 is the top view of heretofore described vibrating sensor；
Fig. 4 is the sectional view along A-A of Fig. 3；
Fig. 5 is the right view of heretofore described vibrating sensor；
Fig. 6 is the situation of change schematic diagram of vibrating sensor of the present invention vibration period and amplitude in atmosphere；
Fig. 7 is the change schematic diagram that vibrating sensor of the present invention locally imbeds vibration period and amplitude in grouting material；
Fig. 8 is the change schematic diagram of vibrating sensor of the present invention vibration period and amplitude in grouting material；
Fig. 9 is the detector use state of detection prefabricated concrete structure reinforced bar sleeve grouting plumpness of the present invention
Structural representation；
Figure 10 is the structure of the detector of detection prefabricated concrete structure reinforced bar sleeve grouting plumpness of the present invention
Schematic diagram.
Reference is as follows：
1- vibrating sensors, 11- housings, 12- piezoelectric ceramic pieces, 13- elastomers, 14-PCB circuit boards, 15- embeddings layer,
16- wires, 2- first components, the reinforcing bars of 3- first, 4- sleeves, the reinforcing bars of 5- second, 6- second components, 7- slurry outlets, 8- injected holes,
9- detectors, 91- signals receive processing unit, 92- signal exciting banks, 93-MCU control units, 94- power supplys, the man-machine friendships of 95-
Mutual unit.
Specific embodiment
The specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
Any mechanical oscillation can use equation：To represent, wherein x is amplitude, A0For first
Beginning amplitude, t be time, ω be the natural angular frequency of vibrational system, β be damped coefficient.The amplitude for wherein vibrating exponentially is decayed,
When vibrating body is certain, excitation after initial vibration amplitude and frequency it is certain, the elastic modelling quantity of the medium around vibrating body it is bigger its
Damped coefficient is bigger, therefore medium around vibrating body is the mortar after sky gas and water, the mortar of flowing, solidification, its damping system
Number increases successively, and accordingly, the decay of amplitude will be sharply increased.For this design can by electric signal encourage produce vibration and
The vibrating sensor and corresponding detecting instrument of the damping vibration signal after excitation revocation can be received, vibrating sensor is embedded in
Between the grout gap of reinforced bar sleeve grout outlet, then can be by receiving the attenuation of signal amplitude come discriminating sensor surrounding medium
Proterties, reach detection sleeve grouting whether full purpose.
As shown in Fig. 2 one kind that the present invention is provided is used to detect prefabricated concrete structure reinforced bar sleeve grouting plumpness
Method operation principle theoretical model, the amplitude fading principle based on damping vibration, on direction of vibration, what object was subject to makees
Firmly include elastic force and frictional resistance.
Frictional resistance：fr=-γ v, γ is resistance coefficient in formula, and v is speed；
According to Newton's second law：
In above-mentioned formula, k is coefficient of elasticity, and m is quality, and x is displacement or amplitude, and t is the time；
I.e.
Order
Wherein, ω0The referred to as natural angular frequency of vibrational system, β is referred to as damped coefficient；This equation presses the difference of β sizes, micro-
Dividing equation has three kinds of solutions of multi-form.When damping smaller, now β ＜ ω0, referred to as underdamping state.
Non trivial solution is：
Form can be further written as：
Wherein, A (t)=A0e-βtReferred to as the amplitude of damping vibration, analyzes this formula and understands that the amplitude of damping vibration presses index
Rule decays, and β is bigger, and decay is faster, so damping vibration is called convergent oscillation.
It is the vibration song of the vibrating sensor 1 under different damping coefficient as shown in Fig. 6,7 and 8 based on above-mentioned rule
Line.As shown in fig. 6, when clearly can tell β=0.6, the situation of change of sensor vibration period and amplitude in atmosphere, such as
Shown in Fig. 8, during β=1, the situation of change of sensor vibration period and amplitude in grouting material, and further basis can shake
Dynamic cycle and the situation of change of amplitude, as shown in fig. 7, told during β=5 sensor locally in embedment grouting material the vibration period and
The situation of change of amplitude.
As in Figure 3-5, a kind of detection prefabricated concrete structure reinforced bar sleeve grouting is full in illustrating the present invention
The vibrating sensor 1 of degree, including the closed shell 11 of opening is provided with, the bottom of the inner chamber of the housing 11 is provided with piezoelectric ceramic piece
12, the piezoelectric ceramic piece 12 is connected with the side of elastomer 13, and opposite side and the PCB 14 of the elastomer 13 connect
Connect, the opening of the housing 11 is provided with embedding layer 15 and carries out airtight waterproof, the positive pole and negative pole of the piezoelectric ceramic piece 12 with wear
The wire 16 for crossing embedding layer 15 is connected.In the present embodiment, the housing 11 is cylinder, and the diameter of the cylinder is less than 12mm, high
Degree is less than 6mm.Preferably, a diameter of 10mm of the cylinder, is highly 3mm, more preferably, a diameter of 8mm of the cylinder,
Highly it is 2.5mm.
As shown in Figures 9 and 10, a kind of detection prefabricated concrete structure reinforced bar sleeve grouting plumpness that the present invention is provided
Detector, the detector 9 includes carrying out the MCU control unit 93 of signal transmission with man-machine interaction unit 95, the MCU controls
Unit processed 93 is connected with signal receiving and processing device 91, signal exciting bank 92 and power supply 94 respectively, the signal exciting bank
92 are connected with the wire 16 of vibrating sensor 1, and the vibrating sensor 1 produces damping vibration ripple after being connected to pumping signal, described
Damping vibration ripple is transferred to MCU control unit 93 by vibrating sensor 1, the MCU control unit 93 be single-chip microcomputer, DSP or
FPGA, the man-machine interaction unit 95 includes keyboard, touch-screen, liquid crystal display, computer, panel computer or mobile phone.
Present invention also offers a kind of method for detecting prefabricated concrete structure reinforced bar sleeve grouting plumpness, including with
Lower step：
Step 1) according to mechanical oscillation equation：Calculate respectively medium for air,
Water, the mortar of flowing and after solidification mortar vibration amplitude exponential damping threshold, according to the exponential damping value, selection connection
Vibrating sensor 1 and detector 9, the vibrating sensor 1 is after electric signal encourages and produces vibration and receive excitation revocation
Damping vibration signal increases successively with damped coefficient, and the decay of amplitude can be sharply increased；
Step 2) first component 2 of sleeve 4 will be embedded with and second component 6 is assembled, is provided with first in first component 2
Reinforcing bar 3, the second reinforcing bar 5 by the outwardly setting of the second component 6 in assembling process is assembled in the inner chamber of sleeve 4,
Wait grouting；
Step 3) before grouting, by step 1) vibrating sensor 1 is embedded in the grout gap of the grout outlet of reinforced bar sleeve 4
Between, the grout outlet 7 on height and sleeve 4 that the vibrating sensor 1 is set it is highly identical；
Step 4) injected hole 8 from first component 2 proceeds by grouting, and before grouting material solidification, connection vibration is passed
Sensor 1 and Acquisition Instrument 9, and start detector 9, the vibrating sensor 1 sends in the signal exciting bank 92 for being arranged on outside
Under the driving of pumping signal, mechanical oscillation are produced, while the signal that sensor damping vibration after pumping signal revocation is produced is received,
When the surface of vibrating sensor 1 is covered by different medium, damped coefficient is different, and the vibration of vibrating sensor 1 will be with not synchronized
Degree decay, surface dielectric elastic modelling quantity is bigger, and vibration decay is faster；Surface dielectric elastic modelling quantity is smaller, and vibration decay is slower, shakes
Dynamic sensor 1 sends signal according to the rule of vibration decay, and signal receiving and processing device 91 receives the letter that vibrating sensor 1 sends
Number, signal transacting, sampling processing, change of the signal receiving and processing device 91 according to vibration wave attenuation value are carried out to signal
Change, judge the relative position of grouting material and vibrating sensor 1, when grouting material covers vibrating sensor 1 completely, vibration decay is most
Greatly, signal is sent to man-machine interaction unit 95 by MCU control unit 93, the plumpness after grouting material grouting in sleeve 4, root
According to the attenuation of vibrating sensor 1 is detected, the plumpness after grouting is judged, it is not full, then carry out back-grouting；
Step 5) tested after mortar grouting material is fully cured, changed according to vibration wave attenuation value, after solidification
The exponential damping value of mortar vibration amplitude is compared, according to receive signal amplitude attenuation value change, judge grouting material and
The relative position of vibrating sensor 1, whether the surrounding medium for differentiating vibrating sensor 1 is that the mortar of air or solidification judges sleeve
Grouting plumpness in 4.Step 5) including the grouting material solidification after, according to the vibrating sensor 1 vibrate attenuation value it is big
Small situation, judges the slurry plumpness after grouting, and vibration attenuation value is small, and the plumpness after grouting solidification is insatiable hunger
It is full, judge construction quality for unqualified.The present invention can according to the damping vibration attenuation of sensor judge grouting material height and
The relation of sensor, reaches and controls to judge whether grouting material is filled at any time in work progress, can complete grouting after solidification of being in the milk
The purpose of plumpness detection.
The present invention is not limited to above-mentioned implementation method, in the case of without departing substantially from substance of the invention, this area skill
Any deformation that art personnel are contemplated that, improvement, replacement each fall within protection scope of the present invention.
Claims (3)
1. it is a kind of to detect that prefabricated concrete structure reinforced bar sleeve is in the milk the vibrating sensor of plumpness, it is characterised in that described
Including being provided with the closed shell (11) of opening, the bottom of housing (11) inner chamber is provided with piezoelectric ceramic piece to vibrating sensor (1)
(12), the piezoelectric ceramic piece (12) is connected with the side of elastomer (13), opposite side and the PCB circuits of the elastomer (13)
Plate (14) is connected, and the opening of the housing (11) is provided with embedding layer (15) carries out airtight waterproof, the piezoelectric ceramic piece (12)
Positive pole and negative pole are connected with the wire (16) through embedding layer (15), and the housing (11) is cylinder；
Wherein, the diameter of the cylinder is less than 12mm, highly less than 6mm；
Wherein, the wire (16) is also attached to detect the vibrating sensing of prefabricated concrete structure reinforced bar sleeve grouting plumpness
The signal exciting bank (92) of the detector (9) of device, the signal exciting bank (92) is connected to MCU control unit (93), institute
State MCU control unit (93) and be connected to man-machine interaction unit (95).
2. the vibrating sensor of prefabricated concrete structure reinforced bar sleeve grouting plumpness is detected according to claim 1, its
It is characterised by that a diameter of 10mm of the cylinder is highly 3mm.
3. the vibrating sensor of prefabricated concrete structure reinforced bar sleeve grouting plumpness is detected according to claim 1, its
It is characterised by that a diameter of 8mm of the cylinder is highly 2.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510679073.2A CN105223343B (en) | 2015-10-19 | 2015-10-19 | A kind of vibrating sensor for detecting prefabricated concrete structure reinforced bar sleeve grouting plumpness |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510679073.2A CN105223343B (en) | 2015-10-19 | 2015-10-19 | A kind of vibrating sensor for detecting prefabricated concrete structure reinforced bar sleeve grouting plumpness |
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| CN105223343A CN105223343A (en) | 2016-01-06 |
| CN105223343B true CN105223343B (en) | 2017-06-23 |
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| CN105865568B (en) * | 2016-04-12 | 2021-12-24 | 北京市建筑设计研究院有限公司 | Nondestructive quantitative detection device for grouting sleeve for steel bar connection |
| CN107328921B (en) * | 2017-05-11 | 2019-11-19 | 中国建筑股份有限公司 | A kind of grout sleeve grouting material plumpness detection device and method |
| CN107478512B (en) * | 2017-08-01 | 2019-09-13 | 上海市建筑科学研究院 | A kind of detection device and detection method of sleeve grouting quality |
| 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 |
| CN108956962A (en) * | 2018-07-27 | 2018-12-07 | 宁波联城住工科技有限公司 | The evaluating apparatus and method of grouting material plumpness in grout sleeve |
| CN109991398A (en) * | 2019-01-03 | 2019-07-09 | 北京中建建筑科学研究院有限公司 | Device and method for detecting grouting fullness of steel bar sleeve |
| CN110514736A (en) * | 2019-07-23 | 2019-11-29 | 中建三局集团有限公司 | A kind of monitoring device and its application method of assembled steel reinforced sleeve grouting compactness |
| CN110455914B (en) * | 2019-08-16 | 2020-07-03 | 哈尔滨全感科技有限公司 | Grouting sleeve internal grouting state detection method based on built-in piezoelectric ceramic element |
| CN111744822A (en) * | 2020-07-30 | 2020-10-09 | 福建江夏学院 | Nondestructive testing system for testing assembly type concrete structural part |
| CN112014548B (en) * | 2020-08-04 | 2023-05-12 | 上海建工集团股份有限公司 | Device and method for detecting slurry filling fullness in mechanical sleeve grouting construction stage |
| CN112067094B (en) * | 2020-09-09 | 2021-11-02 | 重庆大学 | Friction nanometer generator self-driven mass sensor based on one-dimensional under-damped motion mode |
| CN113504135B (en) * | 2021-06-24 | 2022-04-05 | 昆山市建设工程质量检测中心 | Method for judging whether grouting material in grouting hole of sleeve slips or not under impact |
| CN113981841B (en) * | 2021-11-24 | 2023-08-22 | 山东交通学院 | Curved surface pier stud perforating sampling grouting reinforcement device and reinforcement method |
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