CN110374003A - A kind of cord clip of suspension bridge screw rod axle power synchronous construction system and its application method - Google Patents
A kind of cord clip of suspension bridge screw rod axle power synchronous construction system and its application method Download PDFInfo
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- CN110374003A CN110374003A CN201910596961.6A CN201910596961A CN110374003A CN 110374003 A CN110374003 A CN 110374003A CN 201910596961 A CN201910596961 A CN 201910596961A CN 110374003 A CN110374003 A CN 110374003A
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- screw rod
- tensioned
- axle power
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- 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
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Abstract
The invention discloses a kind of cord clip of suspension bridge screw rod axle power synchronous construction system and its application methods, comprising: tensioning equipment, the tensioning equipment with screw rod to be tensioned for being connected and implementing tensioning to the screw rod to be tensioned；Supersonic detection device, the supersonic detection device is used to be connected with screw rod to be tensioned, and emits ultrasonic signal into the screw rod to be tensioned, and detect the propagation time of ultrasonic signal round trip in screw rod to be tensioned；Control device, the control device are connected with the tensioning equipment and supersonic detection device, are used for according to t2、t3The construction of the amendment in screw rod to be tensioned axle power F is calculated with preset formula2, and tensioning equipment is controlled using amendment construction axle power F2It treats tensioning screw rod and implements tensioning, be related to bridge construction technical field.The present invention formulates amendment scheme for the retraction damaed cordition of stretching single screw rod itself, and the axle power for having properly settled the next screw rod of nut group loses big and big randomness engineering problem.
Description
Technical field
The present invention relates to bridge construction technical field, it is specifically related to a kind of cord clip of suspension bridge screw rod axle power and synchronizes apply
Work system and its application method.
Background technique
Cord clip of suspension bridge is one of the main member of suspension bridge superstructure, is that cord clip exists in the Major Diseases of use process
It is slid on main push-towing rope, the reason is that cord clip screw rod axle power is insufficient, the requirement of highway in China bridges and culverts Maintenance specification (2004) 3.3.9 item
It checks " whether the cord clip of suspension bridge sunpender upper end and main rope loosen, shift and damaged ", Highway bridge technique status assessment mark
Cord clip sliding is also greater than 10mm in quasi- (2011) 7.2.1 item and is considered as serious defect.
At present when carrying out cord clip screw rod practice of construction, screw stretching to construction axle power is generally held by lotus using jack,
Tight nut is dialled with short spanner by worker again, progressive operation is used in stretching process, is generally divided into 2-3 grades, every grade of tensioning is held lotus and dialled
Jack oil return after tight nut, is finally completed construction.
But during current jack tension, due to nut, cushion block and cord clip contact surface roughness scenario not
It is identical to the greatest extent, and screw flight itself processes situation there is also fine distinction, cause worker dial the degree randomness of tight nut compared with
Greatly, the axle power loss of screw rod is larger after jack oil return, and randomness is also larger, according to the actual measurement situation of certain bridge, screw rod after tensioning
Axle power loss range from 10% to 60% differs；So that the axle power fastening construction of cord clip screw rod is hardly resulted in and accurately controlled, apply
After the completion of work, screw rod axle power can not be checked in time, and drawing can then bring biggish workload again again after the later period checks, be increased
It construction cost and is easy to delay the duration.
Summary of the invention
The purpose of the invention is to overcome the shortcomings of above-mentioned background technique, a kind of construction that screw rod axle power can be improved is provided
Control the cord clip of suspension bridge screw rod axle power synchronous construction system and its application method of precision.
The present invention provides a kind of cord clip of suspension bridge screw rod axle power synchronous construction system, comprising:
Tensioning equipment, the tensioning equipment with screw rod to be tensioned for being connected and implementing tensioning to the screw rod to be tensioned；
Supersonic detection device, the supersonic detection device with screw rod to be tensioned for being connected, and to the spiral shell to be tensioned
Emit ultrasonic signal in bar, and detects the propagation time of ultrasonic signal round trip in screw rod to be tensioned；
Control device, the control device are connected with the tensioning equipment and supersonic detection device, are used to control and open
By the screw stretching to be tensioned to first state, and in said first condition, control is ultrasonic using default axle power for drawing device
Detection device transmitting ultrasonic signal and the propagation time t for obtaining ultrasonic signal round trip in screw rod to be tensioned2；Control dress
It sets and is also used to control tensioning equipment and unloads the default axle power so that screw rod to be tensioned is in the second state, and described second
Supersonic detection device transmitting ultrasonic signal is controlled under state and obtains the biography of ultrasonic signal round trip in screw rod to be tensioned
T between sowing time3；Control device is also used to according to t2、t3The construction of the amendment in screw rod to be tensioned axle power F is calculated with preset formula2, and
Tensioning equipment is controlled using amendment construction axle power F2It treats tensioning screw rod and implements tensioning.
Based on the above technical solution, the preset formula is as follows:
ΔF1=K* (t2-t3)
F2=F1-ΔF0+ΔF1
In formula, Δ F1For the actual loss axle power of screw rod to be tensioned；When K is propagation of the ultrasonic signal in screw rod to be tensioned
Between linearly dependent coefficient with axle power in screw rod to be tensioned；F1For the design and construction axle power of screw rod to be tensioned；ΔF0For spiral shell to be tensioned
The allowable loss axle power of bar.
Based on the above technical solution, the tensioning equipment, supersonic detection device are connected to described to be tensioned
The two sides of screw rod.
Based on the above technical solution, the tensioning equipment includes:
Tensioning head, the tensioning head are used to be fixed on one end of screw rod to be tensioned；
Hydraulic oil pump, the hydraulic oil pump are connected with the tensioning head and control device, and the control device is for controlling
Hydraulic oil pump driving tensioning head processed treats tensioning screw rod and carries out tensioning.
Based on the above technical solution, the supersonic detection device includes:
Ultrasonic probe, the ultrasonic probe are fixed on one end of screw rod to be tensioned, are used for one end to screw rod to be tensioned
Emit ultrasonic signal, and receives reflection signal of the ultrasonic signal after the screw rod other end to be tensioned reflection；
Ultrasonic excitation device, the ultrasonic excitation device are connected with ultrasonic probe, are used to drive ultrasonic probe transmitting super
Acoustical signal；
Signal pickup assembly, the signal pickup assembly are connected with ultrasonic excitation device and control device, the control
Device is used to control signal pickup assembly and acquires the ultrasonic signal of the ultrasonic probe transmitting via ultrasonic excitation device, and records
Launch time, and the acquisition received reflection signal of ultrasonic probe, and receiving time is recorded, finally obtain ultrasonic signal wait open
Draw the propagation time of round trip in screw rod.
Based on the above technical solution, the signal pickup assembly includes signal conditioner and data collector, institute
It states signal conditioner to be connected with data collector, the signal conditioner is used for the frequency pick-up of ultrasonic signal and reflection signal
To the frequency acquisition of data collector, data collector records launch time for acquiring the ultrasonic signal after pick-up frequency,
And the reflection signal after acquisition pick-up frequency, and receiving time is recorded, finally show that ultrasonic signal is past in screw rod to be tensioned
Return the primary propagation time.
Based on the above technical solution, the frequency acquisition of the data collector is 80MHz.
Based on the above technical solution, the default axle power is the design and construction axle power F of screw rod to be tensioned1's
90%.
The present invention also provides a kind of application method of above-mentioned cord clip of suspension bridge screw rod axle power synchronous construction system, including it is following
Step:
Tensioning equipment is connected with screw rod to be tensioned；
Supersonic detection device is connected with screw rod to be tensioned；
Control device controls tensioning equipment using default axle power for the screw stretching to be tensioned to first state, and in institute
It states and controls supersonic detection device transmitting ultrasonic signal under first state and obtain the ultrasonic signal round-trip one in screw rod to be tensioned
Secondary propagation time t2；
Control device controls tensioning equipment and unloads the default axle power so that screw rod to be tensioned is in the second state, and in institute
It states and controls supersonic detection device transmitting ultrasonic signal under the second state and obtain the ultrasonic signal round-trip one in screw rod to be tensioned
Secondary propagation time t3；
Control device is according to t2、t3The construction of the amendment in screw rod to be tensioned axle power F is calculated with preset formula2, and control tensioning
Device is using amendment construction axle power F2It treats tensioning screw rod and implements tensioning.
Based on the above technical solution, the tensioning equipment, supersonic detection device are connected to described to be tensioned
The two sides of screw rod.
Compared with prior art, advantages of the present invention is as follows:
(1) present invention can be automatically performed synchronous tension, and be directed to the retraction damaed cordition system of stretching single screw rod itself
Periodical repair direction-determining board has been properly settled due to nut, cushion block and cord clip structure interface roughness is not identical and screw flight adds
Work situation there are nuance, caused by nut dial next screw rod axle power loss is big and engineering problem that randomness is big.
(2) construction system construction is simple of the invention does not propose higher machining accuracy to the structure of cord clip and screw rod
It is required that reducing manual operation, construction error is reduced.
(3) present invention can check the axle power state of screw rod immediately after the completion of screw stretching, for not meeting construction requirement
Screw rod make counte-rplan in time, avoid check with construct separate caused by multiple drawing work problem, ensured and applied
Construction cost and construction time is greatly saved while working medium amount.
Detailed description of the invention
Fig. 1 is the structural representation that the cord clip of suspension bridge screw rod axle power synchronous construction system of the embodiment of the present invention is connect with screw rod
Figure.
Appended drawing reference: 1-tensioning equipment, 11-tensioning heads, 12-hydraulic oil pumps, 2-supersonic detection devices, 21-ultrasounds
Probe, 22-ultrasonic excitation devices, 23-signal pickup assemblies, 3-control devices, 31-control modules, 32-computing modules,
4-screw rods to be tensioned.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of cord clip of suspension bridge screw rod axle power synchronous construction system, comprising:
Tensioning equipment 1, supersonic detection device 2, control device 3.
The tensioning equipment 1 with screw rod 4 to be tensioned for being connected and implementing tensioning to the screw rod 4 to be tensioned；It is described super
Sound detection device 2 is used to be connected with screw rod 4 to be tensioned, and emits ultrasonic signal into the screw rod 4 to be tensioned, and detects super
The propagation time of acoustical signal round trip in screw rod 4 to be tensioned；The control device 3 is examined with the tensioning equipment 1 and ultrasound
It surveys device 2 to be connected, is used to control tensioning equipment 1 using default axle power and the screw rod 4 to be tensioned is stretched to first state,
And control supersonic detection device 2 emits ultrasonic signal and obtains the ultrasonic signal in screw rod to be tensioned in said first condition
The propagation time t of round trip in 42；Control device 3 is also used to control tensioning equipment 1 and unloads the default axle power so that wait open
Screw rod 4 is drawn to be in the second state, and control supersonic detection device 2 emits ultrasonic signal in said second condition and acquisition should
The propagation time t of ultrasonic signal round trip in screw rod 4 to be tensioned3；Control device 3 is also used to according to t2、t3And preset formula
Calculate the amendment construction axle power F in screw rod 4 to be tensioned2, and tensioning equipment 1 is controlled using amendment construction axle power F2It treats and opens
Screw rod 4 is drawn to implement tensioning.
The present invention can be automatically performed synchronous tension, and repair for the formulation of the retraction damaed cordition of stretching single screw rod itself
Direction-determining board has been properly settled due to nut, cushion block and cord clip structure interface roughness is not identical and screw flight processes feelings
Condition there are nuance, caused by nut dial next screw rod axle power loss is big and engineering problem that randomness is big.
Wherein, the design and construction axle power F that axle power is screw rod 4 to be tensioned is preset190%；First state is to be applied using design
Work axle power F190% by after 4 tensioning of screw rod to be tensioned, hold the state of lotus；Second state is using design and construction axle power F1's
90%, by after 4 tensioning of screw rod to be tensioned, unloads the state of axle power.
In the present embodiment, it is preferred that the preset formula is as follows:
ΔF1=K*t2-t3
F2=F1-ΔF0+ΔF1
In formula, Δ F1For the actual loss axle power of screw rod 4 to be tensioned；K is propagation of the ultrasonic signal in screw rod 4 to be tensioned
The linearly dependent coefficient of axle power in time and screw rod 4 to be tensioned；F2For the amendment construction axle power of screw rod 4 to be tensioned；F1It is to be tensioned
The design and construction axle power of screw rod 4；ΔF0For the allowable loss axle power of screw rod 4 to be tensioned.
In the present embodiment, it is preferred that the tensioning equipment 1 includes:
Tensioning head 11, the tensioning head 11 are used to be fixed on one end of screw rod 4 to be tensioned；
Hydraulic oil pump 12, the hydraulic oil pump 12 are connected with the tensioning head 11 and control device 3, the control device
3 drive tensioning head 11 to treat the progress tensioning of tensioning screw rod 4 for controlling hydraulic oil pump 12.
Hydraulic oil pump 12 can export identical or different stretching force to corresponding tensioning head 11, liquid by oil pipeline
The loading procedure of pressure oil pump 12 uses SERVO CONTROL, and loading accuracy 10KN exports load range 0-3000KN, hydraulic oil pump
12 load time is adjustable.
Tensioning head 11 is automatically performed nut by the torque value of setting and applies stubborn, and the torque value of setting is determined by experimental test,
Consider the torque that adult firmly applies to back-out using 1 meter of long spanner, is 500-800Nm.
In the present embodiment, it is preferred that the supersonic detection device 2 includes:
Ultrasonic probe 21, the ultrasonic probe 21 are fixed on one end of screw rod 4 to be tensioned, are used for screw rod 4 to be tensioned
One end emit ultrasonic signal, and receive the ultrasonic signal through 4 other end of screw rod to be tensioned reflection after reflection signal；
Ultrasonic excitation device 22, the ultrasonic excitation device 22 are connected with ultrasonic probe 21, are used to drive ultrasonic probe
21 transmitting ultrasonic signals；
Signal pickup assembly 23, the signal pickup assembly 23 are connected with ultrasonic excitation device 22 and control device 3, institute
It states control device 3 and acquires the super of the transmitting of ultrasonic probe 21 via ultrasonic excitation device 22 for controlling signal pickup assembly 23
Acoustical signal, and launch time is recorded, and the acquisition received reflection signal of ultrasonic probe 21, and record receiving time, final
The propagation time of ultrasonic signal round trip in screw rod 4 to be tensioned out.
In the present embodiment, it is preferred that the signal pickup assembly 23 includes signal conditioner and data collector, described
Signal conditioner is connected with data collector, and the signal conditioner is used for the frequency pick-up of ultrasonic signal and reflection signal extremely
The frequency acquisition of data collector, data collector record launch time for acquiring the ultrasonic signal after pick-up frequency, with
And the reflection signal after acquisition pick-up frequency, and receiving time is recorded, finally show that ultrasonic signal is round-trip in screw rod 4 to be tensioned
The primary propagation time；In order to improve detection accuracy, data collector is acquired using high frequency, in order to meet adopting for data collector
Collect frequency, signal is filtered using signal conditioner and pick-up；Further, the frequency acquisition of the data collector is
80MHz。
The present invention also provides a kind of application method of above-mentioned cord clip of suspension bridge screw rod axle power synchronous construction system, including it is following
Step:
Tensioning equipment 1 is connected with screw rod 4 to be tensioned；
Supersonic detection device 2 is connected with screw rod 4 to be tensioned；
Control device 3 controls tensioning equipment 1 and the screw rod 4 to be tensioned is stretched to first state using default axle power, and
Control supersonic detection device 2 emits ultrasonic signal and obtains the ultrasonic signal in screw rod 4 to be tensioned in said first condition
The propagation time t of round trip2；
Control device 3 controls tensioning equipment 1 and unloads the default axle power so that screw rod to be tensioned 4 is in the second state, and
Control supersonic detection device 2 emits ultrasonic signal and obtains the ultrasonic signal in screw rod 4 to be tensioned in said second condition
The propagation time t of round trip3；
Control device 3 is according to t2、t3The construction of the amendment in screw rod 4 to be tensioned axle power F is calculated with preset formula2, and control and open
Drawing device 1 is using amendment construction axle power F2It treats tensioning screw rod 4 and implements tensioning.
In the present embodiment, it is preferred that the tensioning equipment 1, supersonic detection device 2 are connected to the spiral shell to be tensioned
The two sides of bar 4.
It is as follows that screw rod axle power construction procedure is carried out using cord clip of suspension bridge screw rod axle power synchronous construction system of the invention:
Using universal testing machine treat tensioning screw rod 4 carry out Experimental Calibration, by linear fit obtain ultrasonic signal to
The linearly dependent coefficient K of axle power in propagation time and screw rod 4 to be tensioned in tensioning screw rod 4；Linearly dependent coefficient K is entered into
In computing module 32；
Before carrying out screw stretching, tensioning head 11 is separately fixed to one end of every screw rod 4 to be tensioned, then visits ultrasound
First 21 are separately fixed at the other end of every screw rod 4 to be tensioned；Under unstress state, ultrasonic signal is in screw rod 4 to be tensioned
Initial travel times are t1；
Screw stretching classification carries out, and the first order is using design and construction axle power F150% treat tensioning screw rod 4 carry out tensioning,
31 output order of control module exports the load to tensioning head 11 to hydraulic oil pump 12, by oil pipeline, after tensioning in place
Lotus 2min is held, tensioning head 11 is unloaded to set 12 oil return of hydraulic oil pump after the automatic tightening nut 15s of torque；
The second level is using design and construction axle power F190% treat tensioning screw rod 4 carry out tensioning, control module 31 output refers to
Hydraulic oil pump 12 is enabled, is exported the load to tensioning head 11 by oil pipeline, lotus is held in tensioning afterwards in place, and control module 31 is defeated
Supersonic detection device 2 is arrived in instruction out, and signal pickup assembly 23 detects propagation time t of the ultrasonic signal in screw rod 4 to be tensioned2,
After 2min, tensioning head 11 is to set the automatic tightening nut of torque, and after 15s, 12 oil return of hydraulic oil pump unloading, control module 31 is exported
Supersonic detection device 2 is instructed, signal pickup assembly 23 detects propagation time t of the ultrasonic signal in screw rod 4 to be tensioned3；
Computing module 32 calculates 4 actual loss axle power Δ F of screw rod to be tensioned after the tensioning of the second level according to above data1: Δ
F1=K*t2-t3；
And the axle power F that designes and constructes1=F0+ΔF0, wherein F0To design axle power, Δ F0For allowable loss axle power；
Therefore, amendment construction axle power F2=F1-ΔF0+ΔF1；
Tensioning equipment 1 is to correct the axle power F that constructs2Carry out third level tensioning, 31 output order of control module to hydraulic oil pump
12, the load is exported to tensioning head 11 by oil pipeline, lotus 2min is held in tensioning afterwards in place, and tensioning head 11 is to set torque certainly
12 oil return of hydraulic oil pump unloads after dynamic tightening nut 15s, 31 output order of control module to supersonic detection device 2, signal acquisition
Device 22 detects propagation time t of the ultrasonic signal in screw rod 4 to be tensioned4；
Computing module 32 calculates after the third level tensioning F ': F '=K*t of axle power in screw rod 4 to be tensioned according to above data4-
t1；The design axle power of requirement is compared respectively, exports construction deviation.
Below by a specific embodiment, the present invention is described in detail.
Screw rod in the present embodiment selects high-strength screw rod, designs axle power F0=750KN, allowable loss axle power Δ F0=
150KN, design and construct axle power F1=F0+ΔF0=900KN.
Construction specifically includes the following steps:
Using universal testing machine treat tensioning screw rod 4 carry out Experimental Calibration, by linear fit obtain ultrasonic signal to
The linearly dependent coefficient K of axle power in propagation time in tensioning screw rod 4 and screw rod 4 to be tensioned, under unstress state, ultrasonic wave exists
Initial travel times in screw rod 4 to be tensioned are t1=367.631 μ s；
Wherein, K is with the Monomial coefficient that 1-2 test specimen is demarcated on experimental bench in a collection of screw rod, K=330.0.
With the axle power F that designes and constructes190% treat tensioning screw rod 4 carry out tensioning, i.e. 810KN, dial tight nut, measurement ultrasound
Propagation time t of the wave in screw rod2=370.085 μ s；
After unloading axle power, propagation time t of the ultrasonic signal in screw rod 4 to be tensioned is measured3=369.182 μ s；
Calculate 4 actual loss axle power Δ F of screw rod to be tensioned1=K*t2-t3=297.99KN, amendment construction axle power F2=F1-
ΔF0+ΔF1=1047.99KN；
With amendment construction axle power F2It treats tensioning screw rod 4 and carries out tensioning, is i.e. 1047.99KN dials tight nut, unloads axle power
Afterwards, tensioning is completed；
Measure propagation time t of the ultrasonic signal in screw rod 4 to be tensioned4=369.927 μ s are calculated in screw rod 4 to be tensioned
Axle power F '=K* (t4-t1)=757.68KN, calculating axle power F ' is 757.68KN and design axle power F0That is the deviation of 750KN,
(757.68-750)/750=1.07%, i.e., axle power F ' and design axle power F in screw rod 4 to be tensioned after the completion of tensioning0It compares, partially
Big by 1.07%, in 5% range, construction is qualified.
The following are the construction data tables of more screw rods of same a batch:
More 4 synchronous constructions of screw rod to be tensioned when 4 tensioning of screw rod to be tensioned, on cord clip.As it can be seen that more screw rods to be tensioned
Axle power after the completion of 4 tensioning is compared with designing axle power, and error within the scope of 5%, meets construction reference, and of the invention is outstanding
Cable bridge cord clip screw rod axle power synchronous construction system can guarantee the construction quality of screw stretching well.
Those skilled in the art can carry out various modifications to the embodiment of the present invention and modification, if these modifications and change
For type within the scope of the claims in the present invention and its equivalent technologies, then these modifications and variations are also in protection scope of the present invention
Within.
The prior art that the content being not described in detail in specification is known to the skilled person.
Claims (10)
1. a kind of cord clip of suspension bridge screw rod axle power synchronous construction system characterized by comprising
Tensioning equipment (1), the tensioning equipment (1) with screw rod to be tensioned (4) for being connected and to screw rod (4) reality to be tensioned
Apply tensioning；
Supersonic detection device (2), the supersonic detection device (2) are used to be connected with screw rod to be tensioned (4), and to described wait open
It draws and emits ultrasonic signal in screw rod (4), and detect ultrasonic signal in the propagation time of screw rod to be tensioned (4) interior round trip；
Control device (3), the control device (3) are connected with the tensioning equipment (1) and supersonic detection device (2), use
The screw rod (4) to be tensioned is stretched to by first state using default axle power in control tensioning equipment (1), and described first
Supersonic detection device (2) transmitting ultrasonic signal is controlled under state and obtains the ultrasonic signal round-trip one in screw rod to be tensioned (4)
Secondary propagation time t2；Control device (3) is also used to control tensioning equipment (1) and unloads the default axle power so that screw rod to be tensioned
(4) it is in the second state, and controls supersonic detection device (2) transmitting ultrasonic signal in said second condition and obtains this and surpass
Propagation time t of the acoustical signal in screw rod to be tensioned (4) interior round trip3；Control device (3) is also used to according to t2、t3With default public affairs
Formula calculates the amendment construction axle power F in screw rod (4) to be tensioned2, and tensioning equipment (1) is controlled using amendment construction axle power F2
It treats tensioning screw rod (4) and implements tensioning.
2. cord clip of suspension bridge screw rod axle power synchronous construction system described in claim 1, which is characterized in that the preset formula is such as
Under:
ΔF1=K* (t2-t3)
F2=F1-ΔF0+ΔF1
In formula, Δ F1For the actual loss axle power of screw rod to be tensioned (4)；K is propagation of the ultrasonic signal in screw rod to be tensioned (4)
The linearly dependent coefficient of time and screw rod to be tensioned (4) interior axle power；F1For the design and construction axle power of screw rod to be tensioned (4)；ΔF0For
The allowable loss axle power of screw rod (4) to be tensioned.
3. cord clip of suspension bridge screw rod axle power synchronous construction system as described in claim 1, it is characterised in that: the tensioning equipment
(1), supersonic detection device (2) is connected to the two sides of the screw rod to be tensioned (4).
4. cord clip of suspension bridge screw rod axle power synchronous construction system as described in claim 1, which is characterized in that the tensioning equipment
(1) include:
Tensioning head (11), the tensioning head (11) are used to be fixed on one end of screw rod to be tensioned (4)；
Hydraulic oil pump (12), the hydraulic oil pump (12) are connected with the tensioning head (11) and control device (3), the control
Device (3) treats tensioning screw rod (4) progress tensioning for controlling hydraulic oil pump (12) driving tensioning head (11).
5. cord clip of suspension bridge screw rod axle power synchronous construction system as described in claim 1, which is characterized in that the ultrasound detection
Device (2) includes:
Ultrasonic probe (21), the ultrasonic probe (21) are fixed on one end of screw rod to be tensioned (4), are used for screw rod to be tensioned
(4) one end emits ultrasonic signal, and receives reflection letter of the ultrasonic signal after the reflection of screw rod to be tensioned (4) other end
Number；
Ultrasonic excitation device (22), the ultrasonic excitation device (22) are connected with ultrasonic probe (21), are used to drive ultrasonic spy
Head (21) emits ultrasonic signal；
Signal pickup assembly (23), the signal pickup assembly (23) and ultrasonic excitation device (22) and control device (3) are homogeneously
Even, the control device (3) is visited for controlling signal pickup assembly (23) via ultrasonic excitation device (22) acquisition ultrasound
The ultrasonic signal of head (21) transmitting, and launch time is recorded, and acquisition ultrasonic probe (21) received reflection signal, and record
Receiving time finally obtains ultrasonic signal in the propagation time of screw rod to be tensioned (4) interior round trip.
6. cord clip of suspension bridge screw rod axle power synchronous construction system as claimed in claim 5, it is characterised in that: the signal acquisition
Device (23) includes signal conditioner and data collector, and the signal conditioner is connected with data collector, the signal tune
It manages device to be used for the frequency acquisition of the frequency pick-up of ultrasonic signal and reflection signal to data collector, data collector is for adopting
Ultrasonic signal after collecting pick-up frequency, and launch time is recorded, and the reflection signal after acquisition pick-up frequency, and record reception
Time finally obtains ultrasonic signal in the propagation time of screw rod to be tensioned (4) interior round trip.
7. cord clip of suspension bridge screw rod axle power synchronous construction system as claimed in claim 6, it is characterised in that: the data acquisition
The frequency acquisition of device is 80MHz.
8. cord clip of suspension bridge screw rod axle power synchronous construction system as described in claim 1, it is characterised in that: the default axle power
For the design and construction axle power F of screw rod to be tensioned (4)190%.
9. a kind of application method of cord clip of suspension bridge screw rod axle power synchronous construction system as described in any of the claims 1 to 8,
It is characterized in that, comprising the following steps:
Tensioning equipment (1) is connected with screw rod to be tensioned (4)；
Supersonic detection device (2) is connected with screw rod to be tensioned (4)；
The screw rod (4) to be tensioned is stretched to first state using default axle power by control device (3) control tensioning equipment (1),
And control supersonic detection device (2) emits ultrasonic signal and obtains the ultrasonic signal in screw rod to be tensioned in said first condition
(4) the propagation time t of interior round trip2；
Control device (3) controls tensioning equipment (1) and unloads described default axle power so that screw rod to be tensioned (4) is in the second state,
And control supersonic detection device (2) emits ultrasonic signal and obtains the ultrasonic signal in screw rod to be tensioned in said second condition
(4) the propagation time t of interior round trip3；
Control device (3) is according to t2、t3The amendment construction axle power F in screw rod (4) to be tensioned is calculated with preset formula2, and control and open
Drawing device (1) is using amendment construction axle power F2It treats tensioning screw rod (4) and implements tensioning.
10. application method as claimed in claim 9, it is characterised in that: the tensioning equipment (1), supersonic detection device (2) point
It is not connected to the two sides of the screw rod to be tensioned (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112033602A (en) * | 2020-09-24 | 2020-12-04 | 罗治军 | High-strength bolt ultrasonic axial force coefficient field calibration system |
| CN112227208A (en) * | 2020-09-23 | 2021-01-15 | 中铁大桥局集团有限公司 | Monitoring and forecasting method for construction period and operation period of suspension bridge cable clamp screw |
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