CN206609735U - A kind of concrete on construction site hardenability real-time feedback system - Google Patents
A kind of concrete on construction site hardenability real-time feedback system Download PDFInfo
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- CN206609735U CN206609735U CN201720052107.XU CN201720052107U CN206609735U CN 206609735 U CN206609735 U CN 206609735U CN 201720052107 U CN201720052107 U CN 201720052107U CN 206609735 U CN206609735 U CN 206609735U
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 claims abstract description 65
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 239000004033 plastic Substances 0.000 claims abstract description 23
- 229920003023 plastic Polymers 0.000 claims abstract description 23
- 230000001133 acceleration Effects 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
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- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001418 larval effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A kind of concrete on construction site hardenability real-time feedback system, its system includes vibration measurement instrument, the output end and input of vibration measurement instrument are connected with vibrator and vibration acceleration sensor respectively, one end connection of vibration acceleration sensor and fixed cone, it is fixedly connected in the other end insertion test specimen of fixed cone, test specimen is arranged in plastics die trial.Using said structure, the utility model can solve the problem that the problem of method of existing detection concrete hardening can not be realized to concrete hardening degree Real-time Feedback.
Description
Technical field
The invention belongs to concrete NDT field, and in particular to a kind of concrete on construction site hardenability Real-time Feedback system
System and method.
Background technology
At present, at civil engineering construction scene, concrete structure and component are poured after finishing, and concrete hardening degree starts
Be concerned by people because it concern when can form removal and support, when can carry out next process.If to hardening journey
Degree, which is held, is forbidden, and when concrete is not hardened enough, supporting dismounting is just carried out rashly, starts the construction of next link, is bound to
Construction quality is adversely affected, the security incident such as severe patient can also cause structure collapse, be broken.Bridge structure, it is big across
Spend in shell structure, the concrete construction of prestressed component, this problem seems particularly pertinent.On the other hand, if waiting mixed
Solidifying soil firm time is long, then can influence construction speed.In order to grasp concrete hardening situation, traditional way is：In construction
When be molded the concrete crushing strength test specimen of multigroup different larval instar, be shelved on beside structure or component, carry out cured under same condition, extremely
The defined time is tested, and obtains the compression strength of concrete.It can be brought very with strength test because excessive test specimen makes
Big workload, in fact will not have test specimen each age, sometimes, in order to save trouble, and can also less do experiment and not try even
Test, the development of intensity is only judged by rule of thumb, so that leading to a disaster, thus, this way is anti-to concrete hardening degree
Present promptness poor, operation inconvenience, it is impossible to meet construction demand.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of concrete on construction site hardenability real-time feedback system
And method, it can solve the problem that the method for existing detection concrete hardening can not be realized and concrete hardening degree Real-time Feedback asked
Topic.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of concrete on construction site hardenability real-time feedback system, it includes vibration measurement instrument, vibration measurement instrument
Output end and input are connected with vibrator and vibration acceleration sensor respectively, and the one of vibration acceleration sensor and fixed cone
It is fixedly connected in end connection, the other end insertion test specimen of fixed cone, test specimen is arranged in plastics die trial.
Above-mentioned plastics die trial bottom is provided with vibration isolator.
Also include protective cover, at least 2 placement regions in protective cover, plastics die trial, test specimen, vibration isolator are integrally placed at anti-
In shield in a placement region, vibration measurement instrument is placed in protective cover in another placement region.
The data output end of above-mentioned vibration measurement instrument and the data input pin of server are connected, the data output end of server
It is connected with client.
Between above-mentioned vibration measurement instrument and server, signal receiving/transmission device is provided between server and client.
Using said structure, the system has automatic exciting, collection and analytic function under programme-control, to implement closing
Condition is provided to concrete hardening characteristic long-time, high-frequency, non-destructive monitoring in the note phase；Frequency and intensity-conversion formula, are carried
Frequency, the intensity corresponding relation surveyed out are supplied；Test specimen cured under same condition at the construction field (site), sends out the intensity of test specimen and works
Exhibition is more nearly；The application of wireless network, has adapted to building site complex environment condition, has added the stability of system operation.With
Based on this, the Real-time Feedback to concrete on construction site hardenability and automatic decision are realized, is timely grasp concrete
The development of intensity, guiding construction provide accurately, intelligent means.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the natural frequency of vibration and hardening duration curve；
Fig. 3 is deduction intensity and hardening duration curve.
Embodiment
A kind of concrete on construction site hardenability real-time feedback system as shown in Figure 1, it includes vibration measurement instrument 8, shaken
The output end and input of dynamic tester 8 are connected with vibrator 7 and vibration acceleration sensor 6 respectively, vibration acceleration sensing
Device 6 is connected with one end of fixed cone 4, is fixedly connected in the other end insertion test specimen 2 of fixed cone 4, test specimen 2 is arranged on plastics examination
In mould 3.
The bottom of plastics die trial 3 is provided with vibration isolator 5.Using plastics die trial 3, it can weaken and avoid the vibration pair of die trial
The influence of the vibration-testing data of test specimen 2；Test specimen 2 can be shelved using vibration isolator 5, the vibration for coming from outside presence and exciting is reduced
Device 7 evokes influence of the vibration of exterior object to the vibration-testing data of test specimen 2, plays vibration isolation effect.
Also include at least 2 placement regions in protective cover 1, protective cover 1, plastics die trial 3, test specimen 2, vibration isolator 5 are overall
It is placed in protective cover 1 in a placement region, vibration measurement instrument 8 is placed in protective cover 1 in another placement region.It can so subtract
High-altitude junk that few test specimen, vibration measurement instrument, sensor and vibrator etc. are often had by construction area, external impact, artificially touch
Touch the interference brought, also function to the effect for preventing losing.The caged of rest area where test specimen is set, and can guarantee that wind, rain, sun
The external environmental factors such as light, temperature act on test specimen, the concrete of test specimen and constructing structure thing is under same curing condition,
Ensure hardenability of the concrete hardening degree as close possible to structural concrete of test specimen.The case of vibration measurement instrument region
Shape is set, and has preferable sealing, then can reduce the adverse effect that the outside adverse circumstances such as rainwater are run to tester.
The data output end of the vibration measurement instrument 8 is connected with the data input pin of server 10, the data of server 10
Output end is connected with client 11.It so can will infer that result uploads onto the server by network, be consulted for related personnel
And Construction Decision.
Between the vibration measurement instrument 8 and server 10, signal receiving/transmission device 9 is provided between server 10 and client.
A kind of method for concrete on construction site hardenability Real-time Feedback based on above-mentioned reponse system, including with
Lower step：
1) correct position at the construction field (site) sets up hotspot 9, makes vibration measurement instrument 8, server 10 and client 11
It can communicate wirelessly；Protective cover 1 is stably placed at the corner beside works, to reduce construction interference, and be can guarantee that
Environmental condition at this is consistent with the curing condition of structural concrete；
2) vibration measurement instrument 8 is placed in the box-like thing of the one end of protective cover 1, it is another that vibration isolator 5 is lain in into protective cover 1
In the cage at end；
3) when concrete structure carries out pouring construction, concrete sample extraction is carried out, particle diameter is screened out and is more than 20mm's
Aggregate, turn it is uniform after load plastics die trial 3, vibration compacting, smooth out surface, and be allowed to in plastics die trial 3 along concordant；Modeling
Expect the concrete setting hardening in die trial 3, as test specimen 2；
4) plastics die trial 3 is put to vibration isolator 5 together with the smooth transfer of test specimen 2 therein；Sensor 6 is passed through again
Signal wire is connected with vibration measurement instrument 8, and is firmly coupled to each other by screw thread with fixed cone 4；Then by fixed cone 4 from examination
The centre of surface of part 2 is inserted vertically into, and is deep to only threaded portion exposed；
5) after test specimen solidifies a period of time, if vibrator 7, which is placed on test specimen 2 to sink, enters concrete, i.e. handle
Vibrator 7 is connected by electric wire with vibration measurement instrument 8, and vertical, steady against end on the upper surface longitudinal axis of test specimen 2
Place, vibrator 7 can not contact plastics die trial 3；
6) vibration measurement instrument 8 is opened, client 11 is opened, server 10 is accessed, setting time interval makes system start work
Make, carry out exciting and data acquisition according to time interval, obtain the vibration time domain waveform of test specimen 2, tried by vibration analysis
The natural frequency of vibration Fi (unit Hz) of part 2；
7) server 10 is calculated the presumption of strength Pi (units MPa) of concrete by formula, and test specimen is numbered, portion is represented
Position, age and presumption of strength are shown in the way of form and strength development graph；
8) when natural frequency of vibration Fi be more than 2000Hz after, test specimen 2 is deviate from from plastics die trial 3, changes and sets time interval, make be
System is continued to run with, and the lid of protective cover is covered during operation, is locked, and test specimen is lost from disturbing, preventing；
9) with the continuation of concrete pouring construction, new test specimen 2 constantly makes, and access system；Increase is passed if necessary
The quantity of sensor 6, vibrator 7, vibration measurement instrument 8 etc.；
10) test specimen 2 for being derived from the same one species concrete for pouring position in storehouse is treated as a collection of, system is by this batch
The newest presumption of strength value of each test specimen 2 when this batch has newest deduction intensity level to occur, obtains this as an ordered series of numbers
Minimum value in ordered series of numbers, as the assessed value P of the position in storehouse concrete strength, it is assumed that can be carried out down as defined in specification together
The value of concrete strength of process is Ps, then when meeting P >=Ps, system, which is sent, can carry out the notice of next process.If
There is no monitoring demand, system is to terminate operation.
Step 6) in, time interval is set as 10 minutes, makes system starts, carries out 1 exciting sum within every 10 minutes
According to collection, a vibration time domain waveform of test specimen 2 is obtained.
Step 8) in, time interval, which changes, to be set to 1 hour, continues to run with system.
Step 7) in formula be Pi=4.138Fi4.121·10-14, corresponding, the size of test specimen is long 300mm, wide
150mm, high 150mm.
In above-mentioned steps, carried out data transmission by building LAN, adapted to the complex environment of job site, it is to avoid
The interference of construction operation and bad weather to wired data transfer, is conducive to the stable operation of system.The data of acquisition enter clothes
Business device, then can enter internet, be that accumulation, integration, analysis and the utilization of large-scale construction data provide the foundation.With journey
The mode of exciting, vibration acquisition, analysis and the deduction of sequence control, concrete sample and works cured under same condition, passes through test specimen
The natural frequency of vibration infers the intensity of structural concrete, and the hardening state for the real-time control concrete of workmen provides means,
The blank of on-site concrete hardenability Intelligence Feedback is filled up.The sampling frequency in step 3 with reference to dependent Concrete construction
The regulation sampled in specification to non-bulky concrete, appropriate sample ensure that the representativeness of feedback result, take into account operation
On convenience." screening out the aggregate that particle diameter is more than 20mm ", has also taken into account the representativeness and operation ease of result, if screened out
Particle diameter is more than 5mm aggregate, directly makes test specimen with mortar, although can more reflect the hardenability of binder materials, but operate
Waste time and energy.Step 7) in formula be great number tested data is arranged, the result of fitting, it by the natural frequency of vibration of test specimen with it is anti-
Compressive Strength is connected, and is realized this method and is docked with specified in the existing specification using compression strength as hardening standard, is
The key of concrete hardening degree feedback.Step 8) in natural frequency of vibration way for being stripped test specimen when being more than 2000Hz, be in reality
Trample what is proposed on experiential basis, on the one hand, during more than 2000Hz, test specimen has a certain degree of hardening, not easy damaged during the demoulding
Test specimen, on the other hand, after hardening so far, if not taking off die trial, the test result of the test specimen natural frequency of vibration will have necessarily
The distortion of degree.Step 10) in same position in storehouse a certain moment all one species concrete test piece intensity inferred value in most
Small value need to could continue the way of construction not less than the intensity level that next process can be carried out as defined in specification, be construction safety
There is provided guarantee.
Embodiment：
A kind of beams of concrete, strength grade of concrete C50, pouring construction continues 3 order of classes or grades at school, 200 cubic metres of total amount, it is desirable to
Actual measurement compression strength reaches that the 75% of design strength could remove bed die.Concrete hardening degree monitoring is carried out using the system：
First, protective cover 1, plastics die trial 3, fixed cone 4, vibration isolator 5, sensor 6 and vibrator 7 are prepared, it is each 3 sets, accurate
Standby 1 set of 4 passage vibration measurement instrument 8, sets up 1 hotspot 9 in construction area, makes server 10, client 11 and vibration
Signal communication between tester 8.Protective cover 1 is placed in construction part secluded, firm place selected around.
Then, 1 representational concrete sample is extracted in per tour, weeds out the aggregate that particle diameter is more than 20mm, is turned uniformly,
Load plastics die trial 3, be fabricated to test specimen 2, shelve after a period of time, observation sample no longer bleeding, when sinking, floating sample table
Face, is allowed to and along concordant, in the cage for then moving into protective cover 1, cage is permeable, light, gas in plastics die trial 3, can be with
Curing condition depending on test specimen 2 is equal to live works.
Afterwards, vibration measurement instrument 8 is stably placed in the box-like thing of protective cover 1, connects power line, by sensor 6 with
Vibration measurement instrument 8 is connected, and is threadedly secured on fixed cone 4, then fixed cone 4 is erected from the upper surface center of test specimen 2
Straight cutting enters sample, deep about 100mm.The surface of test specimen 2 is touched with finger, when feel by vibrator 7 is placed on it will not sink when,
Vertical vibrator 7 of placing is hit exactly in the end of test specimen 2, close proximity to end and should not contact the side wall of plastics die trial 3, it is to avoid swashed
Play the vibration of plastics die trial 3 and influence the collection of the vibration data of test specimen 2.Vibrator 7 is connected with vibration measurement instrument 8.
Finally, system is opened, is set interval as 10 minutes, by this interval, the exciting test specimen 2 of vibrator 7, sensor 6
Gathered with vibration measurement instrument 8 and analyze the vibration, obtain the natural frequency of vibration of test specimen 2 at that time.Natural frequency of vibration value is passed by network
Server 10 is passed, server 10 is calculated by above-mentioned formula is inferred intensity and shown with graph mode.When the natural frequency of vibration is big
When 2000Hz, sensor 6 is unloaded, test specimen 2 is deviate from from plastics die trial 3, taken off by Break-Up System operation from fixed cone 4
Locating cone 4 is not set to be released from test specimen 2 during mould.The test specimen 2 of abjection is reapposed on vibration isolator 5, then sensor 6 again
On fixed cone 4, system is continued to run with.Because now test specimen 2 is hardened, it is no longer necessary to which plastics die trial 3 keeps itself
Shape, in addition, test specimen 2 harden after, the collection of its vibration performance and analysis result are influenceed larger by plastics die trial 3.The demoulding
Afterwards, time interval is set to 1 hour, and system is continued to run with.In the concreting position in storehouse, sample 3 times altogether, make 3 examinations
Part 2, numbering is denoted as：S1、S2、S3.The wherein monitored results of S1 test specimens such as Fig. 2, Fig. 3.Fig. 2 is the natural frequency of vibration with firm time
The graph of change, Fig. 3 is to infer the graph that intensity changes with firm time.Concrete hardening degree feedback record such as table 1：
Table 1
As it can be seen from table 13 concrete samples S1, S2 and S3 being extracted in beams of concrete construction, its presumption of strength
Minimum value be 37.7MPa, meet code requirement and " reach the 75% " of design strength, i.e., not less than 50 × 75%=
37.5MPa.Now system sends prompting：Concrete hardening degree has met requirement.Halt system is run.Workmen refers to
This prompting, can carry out the construction of next link.If necessary to confirm, sample can also be extracted in advance, be molded pressure resistance
Test specimen is spent, after system sends prompting, then experiment confirmation is carried out.
Similar, concrete pre-stress component is before prestressed stretch-draw is carried out, and the intensity of code requirement concrete will reach
To the 100% of design strength, hardenability feedback can also be carried out using the system in this case.
Claims (5)
1. a kind of concrete on construction site hardenability real-time feedback system, it is characterised in that：It includes vibration measurement instrument（8）,
Vibration measurement instrument（8）Output end and input respectively with vibrator（7）And vibration acceleration sensor（6）Connection, vibration adds
Velocity sensor（6）With fixed cone（4）One end connection, fixed cone（4）The other end insertion test specimen（2）In be fixedly connected, try
Part（2）It is arranged on plastics die trial（3）In.
2. concrete on construction site hardenability real-time feedback system according to claim 1, it is characterised in that：The modeling
Expect die trial（3）Bottom is provided with vibration isolator（5）.
3. concrete on construction site hardenability real-time feedback system according to claim 1 or 2, it is characterised in that：Also
Including protective cover（1）, protective cover（1）Inside at least 2 placement regions, plastics die trial（3）, test specimen（2）, vibration isolator（5）It is overall
It is placed in protective cover（1）In an interior placement region, vibration measurement instrument（8）It is placed in protective cover（1）In another interior placement region.
4. concrete on construction site hardenability real-time feedback system according to claim 1, it is characterised in that：It is described to shake
Dynamic tester（8）Data output end and server（10）Data input pin connection, server（10）Data output end with
Client（11）Connection.
5. concrete on construction site hardenability real-time feedback system according to claim 4, it is characterised in that：It is described to shake
Dynamic tester（8）With server（10）Between, server（10）Signal receiving/transmission device is provided between client（9）.
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| CN201720052107.XU CN206609735U (en) | 2017-01-17 | 2017-01-17 | A kind of concrete on construction site hardenability real-time feedback system |
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| CN201720052107.XU CN206609735U (en) | 2017-01-17 | 2017-01-17 | A kind of concrete on construction site hardenability real-time feedback system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108789799A (en) * | 2018-06-26 | 2018-11-13 | 中国冶集团有限公司 | Concrete structure intelligence health control device and its concrete curing method |
| CN113587840A (en) * | 2021-06-23 | 2021-11-02 | 西安市市政建设工程质量检测有限公司 | Method for measuring carbonization depth of concrete sample |
-
2017
- 2017-01-17 CN CN201720052107.XU patent/CN206609735U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108789799A (en) * | 2018-06-26 | 2018-11-13 | 中国冶集团有限公司 | Concrete structure intelligence health control device and its concrete curing method |
| CN113587840A (en) * | 2021-06-23 | 2021-11-02 | 西安市市政建设工程质量检测有限公司 | Method for measuring carbonization depth of concrete sample |
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Zhiyuan Inventor after: Wang Zhenzhen Inventor after: Sun Hualing Inventor after: Chen Junqi Inventor after: Liu Jinbao Inventor after: Li Huitao Inventor before: Chen Zhiyuan Inventor before: Wang Zhenzhen Inventor before: Chen Junqi |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200421 Address after: 430000, 1, building 17, room 1, building 64, corner 1702, Racecourse Road, Jianghan District, Hubei, Wuhan Co-patentee after: CHINA ENERGY ENGINEERING GROUP TECHNOLOGY DEVELOPMENT CO.,LTD. Patentee after: GEZHOUBA GROUP TESTING Co.,Ltd. Address before: 430000, 1, building 17, room 1, building 64, corner 1702, Racecourse Road, Jianghan District, Hubei, Wuhan Patentee before: GEZHOUBA GROUP TESTING Co.,Ltd. |
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| 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: 20171103 |