CN106989856A - A kind of system and method using effective prestress under detecting and stable intermediate plate displacement detection anchor - Google Patents
A kind of system and method using effective prestress under detecting and stable intermediate plate displacement detection anchor Download PDFInfo
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- CN106989856A CN106989856A CN201710155063.8A CN201710155063A CN106989856A CN 106989856 A CN106989856 A CN 106989856A CN 201710155063 A CN201710155063 A CN 201710155063A CN 106989856 A CN106989856 A CN 106989856A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 111
- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 14
- 210000003127 knee Anatomy 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000000418 atomic force spectrum Methods 0.000 description 2
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- 206010003591 Ataxia Diseases 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
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Abstract
The invention discloses a kind of system and method using effective prestress under detecting and stable intermediate plate displacement detection anchor, it includes detecting system and detection method, and described detecting system includes computer control centre, measurement control terminal, oil pump, jack, force snesor, displacement measurement frock, anchor head and steel strand wires；Described detection method includes following implementation steps：S1, basic detecting system installation；S2, detecting system pretension；S3, detecting system security parameter are set；S4, detecting system test parameter are set；S5, detecting system programme-control and data processing work；S6, detecting system closing.The beneficial effects of the invention are as follows：Practical and convenient, easy to operate, test problems are few, need not read knee of curve, not produce influence on original prestressing force, detection reliability is high, detect that safe, accuracy of detection is high.
Description
Technical field
It is specially that a kind of use is detected and stable intermediate plate displacement the present invention relates to post-stressed detection technique field
Detect the system and method for effective prestress under anchor.
Background technology
Post-stressed size is the direct important indicator for weighing prestressed structure performance, the most frequently used and reliable at present
Property higher detection method be reverse drawing method.
The test of reverse drawing method also has a variety of, can be greatly classified into whole beam and single two kinds of test forms.Entire beam tension is pair
Each steel strand wires simultaneous tension of anchor head determines the effective prestress sum of whole anchor head, and single tendon stretch is respectively to each steel
Twisted wire carries out tensioning, and it is effective prestress value under anchor that it, which surveys single prestressed and value, whether entire beam tension or single
Its standard curve of tensioning, which can draw and be fitted using reverse drawing method, draws out F-S prestressing force curves, such as Fig. 1.
Reverse drawing method detection process, is basically divided into 4 stages, first stage：After counter pull starts, opened between each structure
Begin to coordinate pretension, phase displacement increase is very fast, and power increase is slower, the O1 sections in such as Fig. 1；Second stage：With anti-after pretension
Pulling force increase, the revealed section steel strand wires displacement increment that starts to be stretched slows down, 12 sections in such as Fig. 1；Phase III：Counter pull reaches
Effective prestress and intermediate plate frictional resistance and after being worth under anchor, internal steel strand wires free segment begins participating in stretching, now freedom length
Change force value can reduce suddenly, 23 in such as Fig. 1 section；Fourth stage：With continuing for counter pull, intermediate plate and steel strand wires simultaneously to
There is obvious flex point in outer movement, curve, and slope reduces on F-S prestressing force curves, 34 sections in such as Fig. 1.
Existing reverse drawing method test effective prestress accuracy is higher, 23 sections in such as Fig. 1, when considering frictional force, takes at 3 points
To stress value, when not considering frictional force, take at 2 points to stress value.
The maximum test of current reverse drawing method is mainly bathmometry and spacing method, and bathmometry mainly passes through power and steel beam
The flex point of global displacement relation curve carries out effective prestress value under judgement anchor, and bathmometry subject matter is：Due to entire beam tension
The incoordination of each steel strand wires caused so that some intermediate plate frictional resistances are larger, effective intermediate plate frictional resistance is smaller, larger for frictional resistance
Intermediate plate, because infinite place mechanism can produce overshoot or intermediate plate disturbance, cause an intermediate plate when putting can not return to original position
Put, the influence to structural bearing capacity is also bigger, be difficult to reverse drawing flex point occur sometimes for the less intermediate plate of frictional resistance, sentence to result
Reading brings many troubles；The subject matter of spacing method is：The reading numerical values typically when limit point is reached, due in stretching process
In overcome participated in after intermediate plate frictional resistance stretching steel strand wires freedom length increase cause intermediate plate that retraction occurs, only read spacing
Point value can cause test result bigger than normal, and existing method has problems in summary, it is difficult to ensure accuracy of detection.
The content of the invention
It is an object of the invention to the shortcoming for overcoming prior art, there is provided a kind of practical and convenient, easy to operate, test problems
What less, detection reliability height, the safe, accuracy of detection of detection were high detects effective under anchor using detecting and stable intermediate plate displacement
Prestressed system and method.
The purpose of the present invention is achieved through the following technical solutions：One kind is using detecting and stable intermediate plate displacement detection anchor
The system and method for lower effective prestress, it includes detecting system and detection method, and described detecting system is controlled including computer
Center, measurement control terminal, oil pump, jack, force snesor, displacement measurement frock, anchor head and steel strand wires, computer control centre
Also it is connected while connection by network or transmission cable with measurement control terminal with oil pump, measurement control terminal passes through signal wire
Cable is connected with force snesor, displacement measurement frock and oil pump respectively, and oil pump is connected by the bottom of oil pipe and jack, jack
Head on malleation force sensor is installed, force snesor and displacement measurement frock are assembled, the top malleation of displacement measurement frock
There is anchor head, intermediate plate is provided between displacement measurement frock and anchor head, steel strand wires sequentially pass through anchor head, displacement measurement frock, power and passed
Sensor, jack are set；Described displacement measurement frock includes moveable anchor, displacement transducer and displacement transmission mechanism, and displacement is passed
The inside that mechanism is arranged on moveable anchor is passed, displacement transducer is arranged on the housing of moveable anchor and closely connect with displacement transmission mechanism
Touch；
Described detection method includes following implementation steps：
S1, basic detecting system installation：Displacement measurement frock, force snesor, jack are penetrated into steel strand wires successively, made
Displacement transmission mechanism is in close contact with intermediate plate, displacement transducer, force snesor, jack, and oil pipe connects jack and oil pump
Connect；
S2, detecting system pretension：System power supply is opened, jack is started working under the driving of oil pump, when power sensing
When device reading reaches certain numerical value, now displacement transducer correspondence also has certain reading, then, and now computer control centre will
The displacement reading carries out zero setting, to record the displacement after intermediate plate loosens；
S3, detecting system security parameter are set：The limit force value of general steel strand wires is 260KN, for the peace of tester
Entirely, general to set the safety limit that 240KN is steel strand wires, once the force value of detecting system reaches this value, detecting system is stopped immediately
Only work, the safety of energy effective guarantee operating personnel；
S4, detecting system test parameter are set：As long as counter pull F ＞ Fy+Fj, loosening just occurs in intermediate plate, now intermediate plate meeting
Displacement S is produced, now, the length increase of the steel strand wires of stretching is participated in, force value can be caused, which to reduce suddenly, causes intermediate plate to bounce back, influence
Test result, in order to accurately calculate FySystem, makes displacement S stable in a steady state value；
Wherein：F：For counter pull, the maximal force for both having overcome intermediate plate frictional resistance to need；
Fy：Effective prestress value under anchor head, the reading of the corresponding force snesors of displacement S after both stablizing；
Fj：The frictional resistance of intermediate plate and anchor head；
S：The corresponding reading of displacement transducer, unit mm after detecting system is stable；
S5, detecting system programme-control and data processing work：Computer control centre is complete certainly by built-in control software
The working condition of dynamic control oil pump so that the display force value of the stable setting values, now force snesor in step of the displacement S of intermediate plate
Both it had been effective prestress F under anchory, record FyValue, so far, effective prestress F under anchoryDetection complete；
S6, detecting system closing：After the completion of detecting system test, if without other test assignments, being turned off；If
There are other test assignments, then step repeatedly described in S1~S5.
Further, the outer wall of described displacement measurement frock offers arc groove, and displacement transducer is embedded in arc
In groove.
Further, the limiting stand for accommodating and limiting intermediate plate position is offered at the top of described displacement measurement frock
Rank.
Further, it is described when sensor readings reach certain numerical value for step S2, the scope of certain numerical value
For 5-10KN.
Further, for step S4, described displacement S constant value control scope is S≤1mm.
Further, for step S5, described built-in control software is specially to develop for the special of this detecting system
Industry software part, it possesses the ability for realizing detecting system above-mentioned functions.
The present invention has advantages below：
1st, the present invention is intended to provide a kind of using the system detected and stable intermediate plate displacement detects effective prestress under anchor
And method, with practical, detect that reliability is high, the characteristics of test problems are few passes through the power for setting and detecting intermediate plate displacement
Sensor, accurately can measure and control the displacement of intermediate plate in system work process, can effectively avoid the disturbance of intermediate plate,
It is effectively controlled original prestressed change.
2nd, it is of the present invention it is a kind of using detect and stable intermediate plate displacement detection anchor under effective prestress system and
The characteristics of method has easy to operate, full rotation type mode of operation, peace only needs simple operations control system after the completion of turning, you can one
Secondary property completes stretching measurement and moves back beam work, while power and displacement and time relationship hyperbolic chart (such as Fig. 4) can be presented, passes through figure
4 this it appears that system can be by the stable numerical value in setting of displacement, and the output of system force value is also more stable；Meanwhile, without
Read knee of curve, influence is not produced on original prestressing force.
3rd, it is of the present invention it is a kind of using detect and stable intermediate plate displacement detection anchor under effective prestress system and
Method has the characteristics of detecting safe, there is provided displacement and limit force value duplicate protection program, have effectively ensured operation
Personal security, while also having ensured that prestressed structure is not damaged.
4th, it is of the present invention it is a kind of using detect and stable intermediate plate displacement detection anchor under effective prestress system and
Also there is method the displacement in the characteristics of accuracy of detection is high, test scope is big, the present invention can independently be set by software, meet
The test request of different type structure, improves test scope, meanwhile, when being detected by having evaded legacy equipment it is many not
Sharp problem so that the precision of intermediate parameters is further improved during detection, finally improves whole detection precision.
Brief description of the drawings
Fig. 1 is anchor cable reverse drawing F-S curves；；
Fig. 2 is the structural representation of detecting system of the present invention；
Fig. 3 is the structural representation of displacement measurement frock 7 of the present invention；
Fig. 4 is test result curve map of the invention；
In figure：1- moveable anchors, 2- arc grooves, 3- displacement transducers, 4- displacement transmission mechanisms, 5- limited steps, 6- power
Sensor, 7- displacement measurement frocks, 8- anchor heads, 9- steel strand wires, 10- jack, 11- oil pipes, 12- oil pumps, 13- measurements control is eventually
End, 14- intermediate plates, 15- computers control centre.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to following institute
State.
As shown in Figures 2 and 3, it is a kind of using detect and stable intermediate plate displacement detection anchor under effective prestress system and
Method, it includes detecting system and detection method, and described detecting system includes computer control centre 15, measurement control terminal
13rd, oil pump 12, jack 10, force snesor 6, displacement measurement frock 7, anchor head 8 and steel strand wires 9, computer control centre 15 pass through
Network or transmission cable are also connected while connection with measurement control terminal 13 with oil pump 12, and measurement control terminal 13 passes through signal
Cable is connected with force snesor 6, displacement measurement frock 7 and oil pump 12 respectively, the bottom that oil pump 12 passes through oil pipe 11 and jack 10
Portion is connected, and malleation installs force sensor 6 on the head of jack 10, and force snesor 6 is assembled with displacement measurement frock 7, displacement
The top of measurement frock 7 is just being pressed with anchor head 8, intermediate plate 14 is provided between displacement measurement frock 7 and anchor head 8, steel strand wires 9 are passed through successively
Anchor head 8, displacement measurement frock 7, force snesor 6, jack 10 is worn to set；Described displacement measurement frock 7 include moveable anchor 1,
Displacement transducer 3 and displacement transmission mechanism 4, displacement transmission mechanism 4 are arranged on the inside of moveable anchor 1, and displacement transducer 3 is arranged on
It is in close contact on the housing of moveable anchor 1 and with displacement transmission mechanism 4；
Described detection method includes following implementation steps：
S1, basic detecting system installation：Displacement measurement frock 7, force snesor 6, jack 10 are penetrated into steel successively to twist
Line 9, makes displacement transmission mechanism 4 be in close contact with intermediate plate 12, displacement transducer 3, force snesor 6, jack 10, and oil pipe 11 will
Jack 10 and oil pump 12 are connected；
S2, detecting system pretension：System power supply is opened, jack 10 is started working under the driving of oil pump 12, works as power
When the reading of sensor 6 reaches certain numerical value, now the correspondence of displacement transducer 3 also has certain reading, then, and now computer is controlled
The displacement reading is carried out zero setting by center 15, to record the displacement after intermediate plate 14 loosens；
S3, detecting system security parameter are set：The limit force value of general steel strand wires 9 is 260KN, for the peace of tester
Entirely, general to set the safety limit that 240KN is steel strand wires 9, once the force value of detecting system reaches this value, detecting system is stopped immediately
Only work, the safety of energy effective guarantee operating personnel；
S4, detecting system test parameter are set：As long as counter pull F ＞ Fy+Fj, loosening just occurs in intermediate plate 14, now intermediate plate
14 can produce displacement S, now, participate in the length increase of the steel strand wires 9 of stretching, force value can be caused, which to reduce suddenly, causes intermediate plate 14 times
Contracting, influences test result, in order to accurately calculate FySystem, makes displacement S stable in a steady state value；
Wherein：F：For counter pull, the maximal force for both having overcome the frictional resistance of intermediate plate 14 to need；
Fy：8 times effective prestress values of anchor head, the reading of the corresponding force snesors 6 of displacement S after both stablizing；
Fj：The frictional resistance of intermediate plate 14 and anchor head 8；
S：The corresponding reading of displacement transducer 3, unit mm after detecting system is stable；
S5, detecting system programme-control and data processing work：Computer control centre 15 is complete by built-in control software
Automatically control the working condition of oil pump 12 so that the stable setting value in step 4 of the displacement S of intermediate plate 14, now force snesor 6
It had both been effective prestress F under anchor to show force valuey, record FyValue, so far, effective prestress F under anchoryDetection complete；
S6, detecting system closing：After the completion of detecting system test, if without other test assignments, being turned off；If
There are other test assignments, then step repeatedly described in S1~S5.
Further, as the preferred embodiment of the present invention, the outer wall of displacement measurement frock 7 offers arc groove
2, displacement transducer 3 is embedded in arc groove 2；The top of displacement measurement frock 7 is offered for accommodating and limiting intermediate plate 14
The limited step 5 of position；It is described when the reading of force snesor 6 reaches certain numerical value for step S2, the scope of certain numerical value
For 5-10KN；For step S4, described displacement S constant value control scope is S≤1mm；For step S5, described is built-in
Control software is the professional software for this detecting system specially developed, and it possesses the energy for realizing detecting system above-mentioned functions
Power.
Described above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form, is not to be taken as the exclusion to other embodiment, and available for various other combinations, modification and environment, and can be at this
In the text contemplated scope, it is modified by the technology or knowledge of above-mentioned teaching or association area.And those skilled in the art are entered
Capable change and change does not depart from the spirit and scope of the present invention, then all should appended claims of the present invention protection domain
It is interior.
Claims (6)
1. a kind of system and method using effective prestress under detecting and stable intermediate plate displacement detection anchor, it is characterised in that：
It includes detecting system and detection method, described detecting system include computer control centre (15), measurement control terminal (13),
Oil pump (12), jack (10), force snesor (6), displacement measurement frock (7), anchor head (8) and steel strand wires (9), in computer control
The heart (15) is also connected while connection by network or transmission cable with measurement control terminal (13) with oil pump (12), measurement control
Terminal (13) is connected with force snesor (6), displacement measurement frock (7) and oil pump (12) respectively by signal cable, oil pump (12)
It is connected by oil pipe (11) with the bottom of jack (10), malleation installs force sensor (6), power on the head of jack (10)
Sensor (6) is assembled with displacement measurement frock (7), and the top of displacement measurement frock (7) is just being pressed with anchor head (8), displacement measurement work
Intermediate plate (14) is provided between dress (7) and anchor head (8), steel strand wires (9) sequentially pass through anchor head (8), displacement measurement frock (7), power
Sensor (6), jack (10) are set；Described displacement measurement frock (7) includes moveable anchor (1), displacement transducer (3) and position
Transmission mechanism (4) is moved, displacement transmission mechanism (4) is arranged on the inside of moveable anchor (1), and displacement transducer (3) is arranged on moveable anchor
(1) it is in close contact on housing and with displacement transmission mechanism (4)；
Described detection method includes following implementation steps：
S1, basic detecting system installation：Displacement measurement frock (7), force snesor (6), jack (10) are penetrated into steel successively
Twisted wire (9), makes displacement transmission mechanism (4) and intermediate plate (12), displacement transducer (3), force snesor (6), jack (10) tight
Contiguity is touched, and oil pipe (11) connects jack (10) and oil pump (12)；
S2, detecting system pretension：System power supply is opened, jack (10) is started working under the driving of oil pump (12), works as power
When sensor (6) reading reaches certain numerical value, now displacement transducer (3) correspondence also has certain reading, then, now computer
The displacement reading is carried out zero setting by control centre (15), to record the displacement after intermediate plate (14) loosens；
S3, detecting system security parameter are set：The limit force value of general steel strand wires (9) is 260KN, for the peace of tester
Entirely, general to set the safety limit that 240KN is steel strand wires (9), once the force value of detecting system reaches this value, detecting system is immediately
It is stopped, the safety of energy effective guarantee operating personnel；
S4, detecting system test parameter are set：As long as counter pull F ＞ Fy+Fj, loosening just occurs in intermediate plate (14), now intermediate plate
(14) displacement S can be produced, now, the length increase of the steel strand wires (9) of stretching is participated in, force value can be caused, which to reduce suddenly, causes intermediate plate
(14) bounce back, test result is influenceed, in order to accurately calculate FySystem, makes displacement S stable in a steady state value；
Wherein：F：For counter pull, the maximal force for both having overcome intermediate plate (14) frictional resistance to need；
Fy：Effective prestress value under anchor head (8), the reading of the corresponding force snesors of displacement S (6) after both stablizing；
Fj：The frictional resistance of intermediate plate (14) and anchor head (8)；
S：The corresponding reading of displacement transducer (3), unit mm after detecting system is stable；
S5, detecting system programme-control and data processing work：Computer control centre (15) is complete certainly by built-in control software
Move the working condition of control oil pump (12) so that the stable setting values in step 4 of the displacement S of intermediate plate (14), now force snesor
(6) display force value had both been effective prestress F under anchory, record FyValue, so far, effective prestress F under anchoryDetection it is complete
Into；
S6, detecting system closing：After the completion of detecting system test, if without other test assignments, being turned off；If there is it
His test assignment, then step repeatedly described in S1~S5.
2. it is according to claim 1 a kind of using the system detected and stable intermediate plate displacement detects effective prestress under anchor
And method, it is characterised in that：The outer wall of described displacement measurement frock (7) offers arc groove (2), displacement transducer (3)
It is embedded in arc groove (2).
3. it is according to claim 1 a kind of using the system detected and stable intermediate plate displacement detects effective prestress under anchor
And method, it is characterised in that：Offered at the top of described displacement measurement frock (7) for accommodating and limiting intermediate plate (14) position
Limited step (5).
4. it is according to claim 1 a kind of using the system detected and stable intermediate plate displacement detects effective prestress under anchor
And method, it is characterised in that：It is described when force snesor (6) reading reaches certain numerical value for step S2, certain numerical value
Scope is 5-10KN.
5. it is according to claim 1 a kind of using the system detected and stable intermediate plate displacement detects effective prestress under anchor
And method, it is characterised in that：For step S4, described displacement S constant value control scope is S≤1mm.
6. it is according to claim 1 a kind of using the system detected and stable intermediate plate displacement detects effective prestress under anchor
And method, it is characterised in that：For step S5, described built-in control software is specially to develop for the special of this detecting system
Industry software part, it possesses the ability for realizing detecting system above-mentioned functions.
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| CN201710155063.8A CN106989856A (en) | 2017-03-14 | 2017-03-14 | A kind of system and method using effective prestress under detecting and stable intermediate plate displacement detection anchor |
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| CN201710155063.8A CN106989856A (en) | 2017-03-14 | 2017-03-14 | A kind of system and method using effective prestress under detecting and stable intermediate plate displacement detection anchor |
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Cited By (7)
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| CN109060523A (en) * | 2018-06-28 | 2018-12-21 | 四川升拓检测技术股份有限公司 | A kind of steel strand wires intermediate plate multiple spot independent displacement detection device for reverse drawing method |
| CN109682519A (en) * | 2018-12-29 | 2019-04-26 | 四川陆通检测科技有限公司 | Detecting and the system and method for stablizing effective prestress under intermediate plate displacement method test anchor |
| CN110440970A (en) * | 2019-08-12 | 2019-11-12 | 四川升拓检测技术股份有限公司 | A kind of system and method positioned at jack head end test anchor lower prestress |
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| CN113008432A (en) * | 2021-02-05 | 2021-06-22 | 郑州东辰科技有限公司 | Effective stress detection method and effective stress detection device |
| CN113514184A (en) * | 2021-09-14 | 2021-10-19 | 四川交达预应力工程检测科技有限公司 | Anchoring force detection device and measurement calculation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109060523A (en) * | 2018-06-28 | 2018-12-21 | 四川升拓检测技术股份有限公司 | A kind of steel strand wires intermediate plate multiple spot independent displacement detection device for reverse drawing method |
| CN109060523B (en) * | 2018-06-28 | 2020-11-24 | 四川升拓检测技术股份有限公司 | A independent displacement detection device of steel strand wires clamping piece multiple spot for anti-pulling method |
| CN109682519A (en) * | 2018-12-29 | 2019-04-26 | 四川陆通检测科技有限公司 | Detecting and the system and method for stablizing effective prestress under intermediate plate displacement method test anchor |
| CN110440970A (en) * | 2019-08-12 | 2019-11-12 | 四川升拓检测技术股份有限公司 | A kind of system and method positioned at jack head end test anchor lower prestress |
| CN111024524A (en) * | 2019-12-11 | 2020-04-17 | 四川陆通检测科技有限公司 | Measuring system and measuring method for roadbed elastic modulus |
| CN111024524B (en) * | 2019-12-11 | 2023-06-09 | 四川陆通检测科技有限公司 | Roadbed elastic modulus measuring system and measuring method |
| CN113008432A (en) * | 2021-02-05 | 2021-06-22 | 郑州东辰科技有限公司 | Effective stress detection method and effective stress detection device |
| CN113008432B (en) * | 2021-02-05 | 2022-07-29 | 郑州东辰科技有限公司 | Effective stress detection method and device |
| CN113514184A (en) * | 2021-09-14 | 2021-10-19 | 四川交达预应力工程检测科技有限公司 | Anchoring force detection device and measurement calculation method |
| CN115030240A (en) * | 2022-06-30 | 2022-09-09 | 甘肃路桥建设集团有限公司 | Automatic monitoring method and automatic monitoring equipment for anchorage device static load test process |
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