CN109682519A - Detecting and the system and method for stablizing effective prestress under intermediate plate displacement method test anchor - Google Patents
Detecting and the system and method for stablizing effective prestress under intermediate plate displacement method test anchor Download PDFInfo
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- CN109682519A CN109682519A CN201811646344.4A CN201811646344A CN109682519A CN 109682519 A CN109682519 A CN 109682519A CN 201811646344 A CN201811646344 A CN 201811646344A CN 109682519 A CN109682519 A CN 109682519A
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- 238000011549 displacement method Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 25
- 238000012360 testing method Methods 0.000 title claims description 24
- 238000006073 displacement reaction Methods 0.000 claims abstract description 129
- 238000001514 detection method Methods 0.000 claims abstract description 90
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 4
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- 230000008569 process Effects 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000000418 atomic force spectrum Methods 0.000 description 2
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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
- G01L5/0028—Force sensors associated with force applying means
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Abstract
The invention discloses a kind of systems of effective prestress under detecting and stable intermediate plate displacement method detection anchor, including main control terminal, detection terminal, self-locking electromagnetic switch control hydraulic system, bridge pressure sensor and displacement measurement tooling；The oil pipe of the self-locking electromagnetic switch control hydraulic system is the hydraulic flow tube of super-pressure resin, the executive component end of the self-locking electromagnetic switch control hydraulic system is installed by the bridge pressure sensor, the other end of the bridge pressure sensor and the positive press-fit of institute's displacement measurement tooling, for one end installation settings of institute's displacement measurement tooling far from bridge pressure sensor in the intermediate plate in anchor head hole, the intermediate plate and steel strand wires are affixed.The invention also discloses a kind of detection methods of the system of effective prestress under detecting and stable intermediate plate displacement method detection anchor.The present invention do not have an impact original prestressing force, detects that high reliablity, detection is highly-safe, detection accuracy is high.
Description
Technical field
The present invention relates to civil engineering quality safety detection technique field, especially a kind of detecting and stable intermediate plate displacement method
Test the system and method for effective prestress under anchor.
Background technique
Post-stressed size is the direct important indicator for measuring prestressed structure performance, the most frequently used and reliable at present
Property relatively high detection method be reverse drawing method.
There are many tests also of reverse drawing method, 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 measures the sum of the effective prestress of entire anchor head, and single tendon stretch is respectively to each steel
Twisted wire carries out tensioning, and surveying single prestressed and value is effective prestress value under anchor, whether entire beam tension or single
Its standard curve of tensioning, which can be obtained and be fitted using reverse drawing method, draws out F-S prestressing force curve, such as Fig. 1.
Reverse drawing method detection process is basically divided into 4 stages, the first stage: after counter pull starts, opening between each structure
Begin to coordinate to pre-tighten, which increases comparatively fast, and power increase is slower, OA section as shown in figure 1；Second stage: pre- next with anti-
Pulling force increases, and the revealed section steel strand wires displacement increment that starts to be stretched slows down, AB section as shown in figure 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, at this time freedom length
Variation force value can reduce suddenly, BC section as shown in figure 1；Fourth stage: with continuing for counter pull, intermediate plate and steel strand wires simultaneously to
There is apparent inflection point in outer movement, curve, and slope reduces on F-S prestressing force curve, CD section as shown in figure 1.
Existing reverse drawing method test effective prestress accuracy is higher, and BC section as shown in figure 1 takes C point when considering frictional force
To stress value, when not considering frictional force, take B point to stress value.
The maximum test of current reverse drawing method is mainly bathmometry and limit method, and bathmometry mainly passes through power and steel beam
The inflection point of global displacement relation curve carries out effective prestress value under judgement anchor, bathmometry main problem are as follows: due to entire beam tension
Caused by each steel strand wires incoordination so that some intermediate plate frictional resistances are larger, some intermediate plate frictional resistances are smaller, larger for frictional resistance
Intermediate plate cause an intermediate plate when putting that can not return to original position since infinite place mechanism can generate overshoot or intermediate plate disturbance
It sets, the influence to structural bearing capacity is also bigger, and intermediate plate lesser for frictional resistance is difficult to reverse drawing inflection point occur sometimes, leads to result
Can not normal interpretation, influence recall rate and detection safety；The main problem of limit method are as follows: generally read when limit point reaches
Numerical value, due to overcoming the steel strand wires freedom length increase for participating in stretching after intermediate plate frictional resistance to cause intermediate plate that can go out in stretching process
It now bounces back, only reading limit point value, to will lead to test result bigger than normal, and reading stationary value, then to will lead to test result less than normal, leads
It causes test result unstable or even intermediate plate loosens and causes safety accident, there are problems for existing method in summary, it is difficult to protect
Demonstrate,prove detection accuracy, stability and safety of structure.
Summary of the invention
To solve problems of the prior art, the present invention provides a kind of detectings and stable intermediate plate displacement method to test anchor
The system and method for lower effective prestress.
The technical solution adopted by the present invention is that:
The system of effective prestress under a kind of detecting and stable intermediate plate displacement method detection anchor, including main control terminal, detection are eventually
End, self-locking electromagnetic switch control hydraulic system, bridge pressure sensor and displacement measurement tooling；
The main control terminal is connect with detection terminal by wireless WIFI, the main control terminal and the control of self-locking electromagnetic switch
Hydraulic system signal connection processed, the detection terminal are connect with bridge pressure sensor and displacement measurement tooling signal respectively；
The self-locking electromagnetic switch control hydraulic system includes executive component, oil pump and connection executive component and oil pump
Oil pipe, the oil pipe is the hydraulic flow tube of super-pressure resin, the executive component of self-locking electromagnetic switch control hydraulic system
Affixed with steel strand wires, the executive component end positive pressure of the self-locking electromagnetic switch control hydraulic system installs the bridge-type pressure
Sensor, the other end of the bridge pressure sensor and the positive press-fit of institute's displacement measurement tooling, institute's displacement measurement tooling
For one end positive pressure installation settings far from bridge pressure sensor in the intermediate plate in anchor head hole, the intermediate plate and steel strand wires are affixed.
Preferably, institute's displacement measurement tooling includes tubular moveable anchor, hall displacement transducer and displacement transmitting machine
Structure；Axial direction in the side wall of the moveable anchor along moveable anchor is successively arranged the displacement transmission mechanism and hall displacement transducer,
The displacement transmission mechanism is located at hall displacement transducer close to one end of intermediate plate, and the displacement transmission mechanism and Hall displacement
The abutting end of sensor mutually supports, and the other end of the displacement transmission mechanism is mutually supported with intermediate plate and anchor head；The detection
Terminal is connect with hall displacement transducer signal.
The detection method of the system of effective prestress under a kind of detecting as described above and stable intermediate plate displacement method detection anchor,
Include the following steps:
Steel strand wires are sequentially passed through anchor head, intermediate plate, the moveable anchor of displacement measurement tooling, bridge-type pressure by S1, installation detecting system
It is affixed with the executive component of self-locking electromagnetic switch control hydraulic system after force snesor, and steel strand wires are also affixed with intermediate plate, make
Anchor head, intermediate plate, displacement transmission mechanism, hall displacement transducer be in close contact, make displacement measurement tooling, bridge pressure sensor and
Self-locking electromagnetic switch controls hydraulic system and is in close contact；
S2, detection system pre-tighten, and control liquid to hall displacement transducer, bridge pressure sensor, self-locking electromagnetic switch
Pressure system, detection terminal and main control terminal, which are powered, to be run, and is passed through main control terminal and is controlled self-locking electromagnetic switch control hydraulic system
Executive component stretch steel strand wires, by detection terminal read bridge pressure sensor and hall displacement transducer reading, when
When bridge pressure sensor counting reaches certain numerical value, set by the hall displacement transducer reading that main control terminal will test terminal
Zero, stablize to record the displacement action amount after intermediate plate loosens and to control equilibrium state；
S3, the setting of detection system detection parameters are that displacement target value phase is arranged in intermediate plate displacement and bridge pressure sensor
The limit value answered, the displacement target value ensure that intermediate plate remains at one and loosens free state, the displacement target value target
Value is hall displacement transducer corresponding reading when detection system is stablized；
S4, the setting of detection system security parameter, are arranged a safe pulling force limit value for steel strand wires, when detection terminal reads bridge
When the reading of formula pressure sensor reaches the safe pulling force limit value of setting, then the control of self-locking electromagnetic switch is stopped by main control terminal
Hydraulic system processed；
S5, effective prestress detection execute member by main control terminal control self-locking electromagnetic switch control hydraulic system
Part stretches steel strand wires, and controlling hydraulic system by PID control self-locking electromagnetic switch using main control terminal keeps the displacement S of intermediate plate steady
It is scheduled on the displacement target value of step S3 setting, the counting of bridge pressure sensor at this time is effective prestress F under anchory, pass through
The counting F for the bridge pressure sensor that main control terminal storage record detection terminal is ready, detection completion；As there are also Detection task,
Then repeat step S1-S4；Such as without Detection task, then system is closed；Wherein, main control terminal passes through PID control oil inlet and fuel-displaced
The holding of amount and system balancing state reaches optimal control parameter, by setting to whole system parameter to guarantee to detect
Precision and structure safety.
Preferably, in step s 2, the range of certain numerical value described in the certain numerical value that bridge pressure sensor reaches is
5kN-10kN。
Preferably, in step s 4, displacement target value is arranged according to actual conditions, according to intermediate plate difference protruded length and beam length
Degree dynamic adjusts and carries out force value amendment.
The beneficial effects of the present invention are:
1, there is practical, detection high reliablity, the few feature of test problems passes through setting and detects and stablize intermediate plate position
The hall displacement transducer of shifting amount, the displacement of energy precise measurement and control intermediate plate in system work process, can be effective
The disturbance for avoiding intermediate plate is effectively controlled original prestressed variation.
2, it having the characteristics of easy operation, full rotation type operating mode only needs simple operations control system after being installed,
Stretching measurement can disposably be completed and move back beam work, while power and displacement and time relationship hyperbolic chart (such as Fig. 4) can be presented,
By Fig. 4 this it appears that displacement can be stablized the numerical value in setting by system, and the output of system force value is also more stable；Together
When, without reading knee of curve, not had an impact to original prestressing force.
3, have the characteristics that detection is highly-safe, be provided with displacement target value and pulling force limit value duplicate protection program, effectively
Ground has ensured operator's safety, while also having ensured that prestressed structure is not damaged.
4, have the characteristics that detection accuracy is high, test scope is big, the displacement in the present invention can independently be set, and be met not
The test request of same type structure improves test scope, meanwhile, many when by having evaded traditional equipment detection unfavorable ask
Topic finally improves whole detection precision so that the precision of intermediate parameters further increases when detection.
Detailed description of the invention
Fig. 1 is anchor cable reverse drawing F-S curve；
Fig. 2 is the knot detecting and stablizing intermediate plate displacement method in the embodiment of the present invention 1 and detect the system of effective prestress under anchor
Structure schematic diagram；
Fig. 3 is the structural schematic diagram of displacement measurement tooling in Fig. 2；
Fig. 4 is test result curve graph of the invention；
Appended drawing reference: 1, moveable anchor, 2, groove, 3, hall displacement transducer, 4, displacement transmission mechanism, 5, limited step,
6, displacement measurement tooling, 7, anchor head, 8, intermediate plate, 9, bridge pressure sensor, 10-1, executive component, 10-2, oil pump, 10-3, oil
Pipe, 11, detection terminal, 12, main control terminal, 13, steel strand wires.
Specific embodiment
The embodiment of the present invention is described in detail with reference to the accompanying drawing.
Embodiment 1
As shown in Fig. 2, the system that a kind of detecting and stable intermediate plate displacement method detect effective prestress under anchor, including master control are whole
End 12, detection terminal 11, self-locking electromagnetic switch control hydraulic system, bridge pressure sensor 9 and displacement measurement tooling 6；
The main control terminal 12 is connect with detection terminal 11 by wireless WIFI, the main control terminal 12 and self-locking electromagnetism
The connection of commutation control hydraulic system signal, the detection terminal 11 are believed with bridge pressure sensor 9 and displacement measurement tooling 6 respectively
Number connection；
The self-locking electromagnetic switch control hydraulic system includes that executive component 10-1, oil pump 10-2 and connection execute member
The oil pipe 10-3, the oil pipe 10-3 of part 10-1 and oil pump 10-2 is the hydraulic flow tube of super-pressure resin, and the self-locking electromagnetism changes
Executive component and steel strand wires 13 to control hydraulic system 10 is affixed, the head of the self-locking electromagnetic switch control hydraulic system 10
Portion's positive pressure installs the bridge pressure sensor 9, and the bridge pressure sensor 9 controls hydraulic pressure system far from self-locking electromagnetic switch
One end of system 10 and institute's displacement measurement tooling 6 are assembled, 6 one end far from bridge pressure sensor 9 of institute's displacement measurement tooling
For positive pressure installation settings in the intermediate plate in 7 hole of anchor head, the intermediate plate 8 and steel strand wires 13 are affixed.
Specifically, as shown in figure 3, institute's displacement measurement tooling 6 includes tubular moveable anchor 1, hall displacement transducer 3
With displacement transmission mechanism 4；The moveable anchor 1 is equipped with the limited step 5 being recessed inwardly, the moveable anchor 1 close to one end of intermediate plate 8
Side wall in along the axial direction of moveable anchor 1 be successively arranged displacement transmission mechanism 4 and hall displacement transducer 3, the displacement transmitting machine
Structure 4 is located at hall displacement transducer 3 close to one end of intermediate plate 8, and the displacement transmission mechanism 4 and hall displacement transducer 3
Abutting end mutually supports, and the other end of the displacement transmission mechanism 4 exposes to the table top and 7 phase of intermediate plate 8 and anchor head of limited step 5
Mutually support；The intermediate plate 8 can be contained in the sunk area that the invagination of limited step 5 is formed；The detection terminal 11 and Hall displacement
The connection of 3 signal of sensor.
Specifically, the side wall of the moveable anchor 1 opens up fluted 2 along its axial direction, the hall displacement transducer 3 and displacement
Transmission mechanism 4 is set in groove 2, and the groove 2 just enough accommodates hall displacement transducer 3 and displacement transmission mechanism 4.
Limited step is for accommodating and limiting intermediate plate, and groove is for accommodating and limiting hall displacement transducer and displacement transmitting
Mechanism can avoid intermediate plate, hall displacement transducer and displacement transmission mechanism lateral movement by above-mentioned limitation, apply intermediate plate forward direction
For power on displacement transmission mechanism, hall displacement transducer, the displacement of intermediate plate is more accurately transferred to hall displacement transducer detection,
Improve final detection accuracy.For those skilled in the art, displacement transmission mechanism is conventional equipment, can be according to practical feelings
The highly sensitive displacement transmission mechanism of condition selection, does not repeat excessively herein.
In system construction detection process, after intermediate plate, steel strand wires, anchor head three occlusion are firm, intermediate plate can pass through with steel strand wires
Pawl being interlocked tightly.Simultaneously because the machining accuracy of intermediate plate, anchor head, steel strand wires and the technique of live lashing because
Element, there are different size of bite force between intermediate plate and anchor head, for prestress system system after the completion of construction by intermediate plate
It may be regarded as an entirety with steel beam, overcome intermediate plate frictional resistance completely by being subjected to displacement it together while guaranteeing, pass through different length
The steel beam of degree is modified to its force value, can accurately calculate effective prestress value under anchor, solves the detection of minimum strain principle
The error of the inconsistent generation of intermediate plate frictional resistance in the process.Since there are rebound phenomenon, simple switches for steel beam in the detection process
Limit cannot test effective force value from steady mode by dynamic, under the value and actual anchors after retraction effective prestress value deviation compared with
Greatly, it is difficult to guarantee measuring accuracy, the whole holding which forms after enabling to intermediate plate to be engaged with steel beam by PID control is certainly
By state, and implement dynamic detection from steady, it can be to have under accuracy test anchor by the steel Shu Jinhang test value amendment of different length
Imitate prestress value.
According to steel strand wires lengthening variable formula:
Wherein, FSFor force value, L is the effective length of presstressed reinforcing steel, and A is steel strand wires area, and E is steel strand wires elasticity modulus,
△ L is presstressed reinforcing steel retracted length；
Following table is different intermediate plate retractions or pulls out influence of the displacement to testing result.
As seen from the above table, when steel Shu Changdu is 10 meters, the retraction or pull-out displacement variable of intermediate plate are to detection
As a result it is affected, bathmometry and limit method can not effectively solve the problems, such as this at present.In order to solve this problem, this system
Effective prestress under anchor can be detected by the common cooperation of electronic control system and accurate hydraulic control system.
Embodiment 2
It is a kind of that the system of effective prestress under anchor is detected using detecting described in embodiment 1 and stable intermediate plate displacement method
Detection method includes the following steps:
Steel strand wires are sequentially passed through anchor head, intermediate plate, the moveable anchor of displacement measurement tooling, bridge-type pressure by S1, installation detecting system
It is affixed with the executive component of self-locking electromagnetic switch control hydraulic system after force snesor, and steel strand wires are also affixed with intermediate plate, make
Anchor head, intermediate plate, displacement transmission mechanism, hall displacement transducer be in close contact, make displacement measurement tooling, bridge pressure sensor and
Self-locking electromagnetic switch controls hydraulic system and is in close contact；
S2, detection system pre-tighten, and control liquid to hall displacement transducer, bridge pressure sensor, self-locking electromagnetic switch
Pressure system, detection terminal and main control terminal, which are powered, to be run, and is passed through main control terminal and is controlled self-locking electromagnetic switch control hydraulic system
Executive component stretch steel strand wires, by detection terminal read bridge pressure sensor and hall displacement transducer reading, when
When bridge pressure sensor counting reaches certain numerical value, set by the hall displacement transducer reading that main control terminal will test terminal
Zero, stablize to record the displacement action amount after intermediate plate loosens and to control equilibrium state；
S3, the setting of detection system detection parameters are that displacement target value phase is arranged in intermediate plate displacement and bridge pressure sensor
The limit value answered, the displacement target value ensure that intermediate plate remains at one and loosens free state, which is inspection
Hall displacement transducer corresponding reading when examining system is stablized；
As long as counter pull F > Fy+Fj, intermediate plate just will appear loosening, and intermediate plate can generate displacement S at this time, participates in the steel stretched and twists
The length of line will increase, and reducing suddenly so as to cause force value causes intermediate plate to bounce back, and influence test result；In order to accurately calculate Fy,
Displacement S after intermediate plate must be made to loosen stablizes in a steady state value, therefore displacement target value is arranged for intermediate plate and detects standard value, the position
Moving target value detecting standard value is hall displacement transducer corresponding reading when detection system is stablized；
Wherein, F is counter pull, the maximal force for both having overcome intermediate plate frictional resistance to need；
FyFor effective prestress value under anchor head, it is both stable after the corresponding bridge pressure sensor of displacement S reading；
FjFor the frictional resistance of intermediate plate and anchor head；
S is the corresponding reading of hall displacement transducer after detection system is stablized, unit mm；
S4, the setting of detection system security parameter, are arranged a safe pulling force limit value for steel strand wires, when detection terminal reads bridge
When the reading of formula pressure sensor reaches the safe pulling force limit value of setting, then the control of self-locking electromagnetic switch is stopped by main control terminal
Hydraulic system processed；
S5, effective prestress detection execute member by main control terminal control self-locking electromagnetic switch control hydraulic system
Part stretches steel strand wires, and controlling hydraulic system by PID control self-locking electromagnetic switch using main control terminal keeps the displacement S of intermediate plate steady
It is scheduled on the displacement target value of step S3 setting, the counting of bridge pressure sensor at this time is effective prestress F under anchory, pass through
The counting F for the bridge pressure sensor that main control terminal storage record detection terminal is ready, detection completion；As there are also Detection task,
Then repeat step S1-S4；Such as without Detection task, then system is closed；Wherein, main control terminal passes through PID control oil inlet and fuel-displaced
The holding of amount and system balancing state reaches optimal control parameter, by setting to whole system parameter to guarantee to detect
Precision and structure safety.
Specifically, in step s 2, the range of certain numerical value described in the certain numerical value that bridge pressure sensor reaches is
5kN-10kN。
Specifically, in step s 4, displacement target value is arranged according to actual conditions, according to intermediate plate difference protruded length and beam length
Degree dynamic adjusts and carries out force value amendment.
A specific embodiment of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.
Claims (5)
1. a kind of detecting and the system for stablizing effective prestress under intermediate plate displacement method detection anchor, which is characterized in that including master control end
End, detection terminal, self-locking electromagnetic switch control hydraulic system, bridge pressure sensor and displacement measurement tooling；
The main control terminal is connect with detection terminal by wireless WIFI, and the main control terminal and self-locking electromagnetic switch control liquid
System signal connection is pressed, the detection terminal is connect with bridge pressure sensor and displacement measurement tooling signal respectively；
The self-locking electromagnetic switch control hydraulic system includes executive component, oil pump and the oil for connecting executive component and oil pump
Pipe, the oil pipe are the hydraulic flow tube of super-pressure resin, the executive component and steel of the self-locking electromagnetic switch control hydraulic system
Twisted wire is affixed, and the executive component end positive pressure of the self-locking electromagnetic switch control hydraulic system installs the bridge-type pressure sensing
Device, the other end of the bridge pressure sensor and the positive press-fit of institute's displacement measurement tooling, institute's displacement measurement tooling are separate
For one end positive pressure installation settings of bridge pressure sensor in the intermediate plate in anchor head hole, the intermediate plate and steel strand wires are affixed.
2. detecting according to claim 1 and the system for stablizing effective prestress under intermediate plate displacement method detection anchor, feature
It is, institute's displacement measurement tooling includes tubular moveable anchor, hall displacement transducer and displacement transmission mechanism；The tool
Axial direction in the side wall of anchor along moveable anchor is successively arranged the displacement transmission mechanism and hall displacement transducer, the displacement transmitting
Mechanism is located at hall displacement transducer close to one end of intermediate plate, and the displacement transmission mechanism and hall displacement transducer is adjacent
End mutually supports, and the other end of the displacement transmission mechanism is mutually supported with intermediate plate and anchor head；The detection terminal and Hall position
The connection of displacement sensor signal.
3. a kind of detecting as claimed in claim 2 and the detection for stablizing the system of effective prestress under intermediate plate displacement method detection anchor
Method, which comprises the steps of:
Steel strand wires are sequentially passed through anchor head, intermediate plate, the moveable anchor of displacement measurement tooling, bridge-type pressure and passed by S1, installation detecting system
Affixed with the executive component of self-locking electromagnetic switch control hydraulic system after sensor, and steel strand wires are also affixed with intermediate plate, make anchor head,
Intermediate plate, displacement transmission mechanism, hall displacement transducer are in close contact, and make displacement measurement tooling, bridge pressure sensor and self-locking
Formula electromagnetic switch controls hydraulic system and is in close contact；
S2, detection system pre-tighten, and control hydraulic pressure system to hall displacement transducer, bridge pressure sensor, self-locking electromagnetic switch
System, detection terminal and main control terminal, which are powered, to be run, and is controlled self-locking electromagnetic switch by main control terminal and is controlled holding for hydraulic system
Units stretch steel strand wires, and the reading of bridge pressure sensor and hall displacement transducer is read by detection terminal, works as bridge-type
When pressure sensor counting reaches certain numerical value, zero setting is read by the hall displacement transducer that main control terminal will test terminal,
Stablize to record the displacement action amount after intermediate plate loosens and to control equilibrium state；
S3, the setting of detection system detection parameters are that intermediate plate displacement and bridge pressure sensor setting displacement target value are corresponding
Limit value, the displacement target value ensure that intermediate plate remains at one and loosens free state, which is detection system
Hall displacement transducer corresponding reading when system is stablized；
S4, the setting of detection system security parameter, are arranged a safe pulling force limit value for steel strand wires, when detection terminal reads bridge-type pressure
When the reading of force snesor reaches the safe pulling force limit value of setting, then self-locking electromagnetic switch is stopped by main control terminal and control liquid
Pressure system；
S5, effective prestress detection control the executive component drawing that self-locking electromagnetic switch controls hydraulic system by main control terminal
Steel strand wires are stretched, controlling hydraulic system by PID control self-locking electromagnetic switch using main control terminal stablizes the displacement S of intermediate plate
The displacement target value of step S3 setting, the counting of bridge pressure sensor at this time is effective prestress F under anchory, pass through master control
The counting F for the bridge pressure sensor that terminal storage record detection terminal is ready, detection completion；If there are also Detection tasks, then weigh
Multiple step S1-S4；Such as without Detection task, then system is closed；Wherein, main control terminal by PID control oil inlet and oil pump capacity and
The holding of system balancing state reaches optimal control parameter, by setting to whole system parameter to guarantee detection accuracy
And structure safety.
4. detecting according to claim 3 and the detection side for stablizing the system of effective prestress under intermediate plate displacement method detection anchor
Method, which is characterized in that in step s 2, the range of certain numerical value described in the certain numerical value that bridge pressure sensor reaches is
5kN-10kN。
5. detecting according to claim 3 and the detection side for stablizing the system of effective prestress under intermediate plate displacement method detection anchor
Method, which is characterized in that in step s 4, displacement target value is arranged according to actual conditions, according to intermediate plate difference protruded length and beam length
Degree dynamic adjusts and carries out force value amendment.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715760A (en) * | 2019-10-30 | 2020-01-21 | 中铁隧道局集团有限公司 | Full-length bonding inclined anchor rod axial force monitoring device and experimental method |
| CN113089495A (en) * | 2021-04-30 | 2021-07-09 | 太原科技大学 | Effective prestress detection method under prestressed concrete simply supported bridge anchor |
| CN113108985A (en) * | 2021-03-15 | 2021-07-13 | 山西省交通科技研发有限公司 | Correction calculation method for tensile value of core wire embedded grating intelligent steel strand |
| 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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