CN108489668B - High-speed railway Curved Beam Bridge rotator construction out-of-balance force test method - Google Patents
High-speed railway Curved Beam Bridge rotator construction out-of-balance force test method Download PDFInfo
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- CN108489668B CN108489668B CN201810366971.6A CN201810366971A CN108489668B CN 108489668 B CN108489668 B CN 108489668B CN 201810366971 A CN201810366971 A CN 201810366971A CN 108489668 B CN108489668 B CN 108489668B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating unbalance
Abstract
The invention discloses high-speed railway Curved Beam Bridge rotator construction out-of-balance force test methods, include the following steps: step 1: the preparation before test: installation jack and arrangement displacement meter；Step 2: experiment of weighing: after slicing off temporary support, adjust jack jacking force size, when displacement meter, which is read, to mutate, moment of flexure that jack jacking force generates, swivel unbalanced moments reach equilibrium,transient between rotor flexural pivot friction moment three, can find out swivel unbalanced moments, rotor flexural pivot friction moment；Step 3: drawing load and displacement curve, and calculates ball and twist the coefficient of friction resistance, rotor eccentricity.The present invention improves construction quality by the uneven weighing field test of swivel to guarantee the structure safety in rotator construction stage；Meanwhile also for the design of similar swivel bridge and construction is accumulated experience and data, for during bridge operation technical management and technology evaluation foundation is provided.
Description
Technical field
The present invention relates to Bridge Rotation Construction Technique technical fields.It is more particularly related to high-speed railway Curved Beam Bridge
Rotator construction out-of-balance force test method.
Background technique
The key technical problem of construction by swing includes: (1) rotating machinery and turning power；(2) structure in work progress
Strength and stability guarantee；(3) system transform during folding structures.Although current bridge rotating technology increasingly at
It is ripe, but for different bridges, it is necessary to it is made according to the features such as its structure type, work progress and place and environmental condition
The swivel scheme of reasonable, to ensure that there is structure enough stability and intensity to guarantee during turning, and avoid due to turning
Body and influence the normal stress of structure or lead to uncontrollable situation.
The rotor system of continuous bridge is made of upper disk, lower cushion cap, upper and lower flexural pivot, support foot, slideway, trailer system.Entirely
Based on rotor system is supported with flexural pivot, it is stable that support foot plays control swivel.Flexural pivot is by upper flexural pivot, lower flexural pivot, friction are secondary, on
Sleeve, lower sleeve, pin shaft, lower flexural pivot skeleton composition.Rotation flexural pivot is the key member of rotator construction, it carries entire rotor
Weight, the size of its coefficient of friction directly affects the size of required drag torque when rotating in rotation.It is complete in construction bracket
Remove entirely latter until swivel terminates, the self-balancing or counterweight of rotor balance play to pass the safety of construction by swing
Important role.
Summary of the invention
It is an object of the present invention to provide high-speed railway Curved Beam Bridge rotator construction out-of-balance force test methods, by turning
Body imbalance weighing field test determines beam body rotation imbalance torque, swivel counterweight, the coefficient of friction resistance, swivel eccentricity etc., with
The structure safety for guaranteeing the rotator construction stage, improves construction quality；It meanwhile being also the design of similar swivel bridge and accumulation of constructing
Experience and data, for during bridge operation technical management and technology evaluation foundation is provided.
In order to realize these purposes and other advantages according to the present invention, high-speed railway Curved Beam Bridge rotator construction is provided
Out-of-balance force test method, includes the following steps:
Step 1: the preparation before test: main girder construction is completed, outer between the upper lower rotary table of flexural pivot before support removing
Circuit position is symmetrically installed 4 400t jack about center of turntable, places 2 respectively along the big mileage side of beam body and small mileage side
Platform, meanwhile, 4 displacement meters are arranged in flexural pivot turntable bottom surrounding；
Step 2: after the I-steel for slicing off temporary support, big mileage side or small mileage side jack top experiment of weighing: are adjusted
Thrust P1Size observes P by displacement meter1Beam body change in displacement during change；When the beam body displacement readings of displacement meter reaction
When mutation, illustrate that flexural pivot produces minor rotation, then jack jacking force P at this time1The moment of flexure P of generation1L1, swivel it is uneven
Weigh torque MG, rotor flexural pivot friction moment MZReach equilibrium,transient between three, it is uneven to find out swivel by this equilibrium relation
Weigh torque MG, rotor flexural pivot friction moment MZ, wherein L1It is jacking force P1The distance for rotating Z axis to pushing tow force from flexural pivot is sweared
Amount；
Step 3: drawing load and displacement curve, and calculate the flexural pivot coefficient of friction resistance, rotor eccentricity, then determines counterweight
Weight, position and new eccentricity.
Preferably, the jack and turntable and two contact surface of lower cushion cap respectively place steel plate, to prevent from concentrating stress
Cause concrete destruction.
Preferably, beam body carries out longitudinal weighing and laterally weighing respectively, to determine swivel unbalanced moments MG, rotor
Flexural pivot friction moment MZAnd the flexural pivot coefficient of friction resistance, rotor eccentricity；In step 2, after the I-steel for slicing off temporary support,
Whether observation support foot lands, if support foot lands, first carries out first time weighing, obtains the weight of actual needs clump weight, carries out
Counterweight makes support foot all liftoff, then carries out multiple title；If whole support foots do not land, counterweight is not needed, is directly claimed
Weight；Wherein, clump weight uses concrete folded plate.
Preferably, the jack includes:
Jack ontology, the hollow cavity with upper surface opening；
Piston is up-small and down-big step type, and the piston is located in the cavity of the jack ontology, will be very heavy
The cavity of top ontology is divided into the type chamber on top and the hydraulic cavities of lower part, the jack ontology have the first of perforation hydraulic cavities into
Liquid mouth, the piston lower portion have first groove of ring shape that is recessed inwardly, the first groove notch by elastic plate with
The connection of piston outer side seal, the piston bottom surface have the second groove being recessed upwards, are up big and down small step type, institute
State the ramp ways that the second groove has the first groove of multiple perforations close to the side of slot bottom, the channel is along the first groove to the
Two grooves tilt down setting；
Top-pushing mechanism comprising I-shaped push block and blocker ring, the push block top and middle part are matched with second
It in groove, and can be slided up and down along the second groove, liquid, institute are filled between the second groove slot bottom and push block upper surface
It states push block lower outside to be tightly connected on the downside of blocker ring, piston bottom surface, the blocker ring upside is fixed on the upside of blocker ring
Positioned at the outside of push block lower part, and the blocker ring is made for high tensile flexible material.
Preferably, the elastic plate includes outer layer, middle layer and internal layer, and the internal layer is elastic material, and the outer layer is
Wearable elastic material and outer layer have multiple Micro-v oids in perforation middle layer, and the middle layer is sponge and is saturated with lubricating oil.
Preferably, the jack ontology also have perforation hydraulic cavities the second inlet, first inlet and
The fixation of second inlet is communicated with the first inlet tube and the second inlet tube, and the two nozzle is relatively arranged in hydraulic cavities, and first
It is provided with regulating valve between inlet tube and the second inlet tube, the quartering is divided by sphere and wherein trisection is inwardly formed
Arc-shaped recess, the lucky salable firmly nozzle of the first inlet tube or the second inlet tube of the equal part that the regulating valve is not recessed, institute
It states regulating valve center and is fixed with rotation axis one end, rotation axis other end level is pierced by jack sheet in vitro and is driven by driving mechanism
Turn is dynamic, is provided with sealing ring between the rotation axis and jack inner body wall.
Preferably, the equal part two sides that the regulating valve is not recessed are provided with one extended centrally out far from regulating valve
To baffle, the upper side end of first inlet tube or the second inlet tube has the concave channel being recessed inwardly, and can accommodate just
Baffle passes through when regulating valve rotates, and the downside of first inlet tube or the second inlet tube has the third groove being recessed inwardly,
It is matched with baffle just.
The present invention is include at least the following beneficial effects:
1, it is influenced by factors such as beam body Mass Distribution unevenness, beam body longitudinal slopes, the vertical of structure is typically subjected to before T structure bridge swivel
To with lateral unbalanced moments MG.Experiment of weighing to the effect that passes through experimental test vertical and horizontal unbalanced moments MGWith
Rotor friction moment MZ, and then the quiet coefficient of friction resistance of flexural pivot and rotor eccentricity are calculated, by the coefficient of friction resistance and eccentricity
Comprehensive analysis, for swivel posture analysis and counterweight technical support is provided, it is ensured that swivel safety.
2, since the rigidity of upper and lower cushion cap is very big, very little is deformed, is easy to make flexural pivot that minor rotation occur.Using flexural pivot
The operation of rotation imbalance torque testing scheme is relatively easy, highly-safe, is uneven using more Bridge Rotation Construction Technique at present
Weigh weighing method.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is that the present invention works as Mz > MG, structural schematic diagram of the jack at big mileage side；
Fig. 2 is that the present invention works as Mz > MG, structural schematic diagram of the jack at small mileage side；
Fig. 3 is that the present invention works as Mz < MG, structural schematic diagram of the jack at big mileage side；
Fig. 4 is that rotor flexural pivot of the present invention turns about the Z axis wiping coefficient calculating schematic diagram；
Fig. 5 is jack of the present invention and displacement meter layout drawing；
Fig. 6 is that 45# pier claims load-displacement curve again in the embodiment of the present invention (jack is loaded in big mileage)；
Fig. 7 is that 45# pier claims load-displacement curve again in the embodiment of the present invention (jack is loaded in small mileage)；
Fig. 8 is jack structure schematic diagram of the present invention；
Fig. 9 is inventive piston schematic enlarged-scale view；
Figure 10 is a kind of status diagram of regulating valve of the present invention.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be noted that experimental method described in following embodiments is unless otherwise specified conventional method, institute
Reagent and material are stated, unless otherwise specified, is commercially obtained；In the description of the present invention, term " transverse direction ", " vertical
To ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", the instructions such as "outside" side
Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description,
It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, because
This is not considered as limiting the invention.
The present invention uses the rotation imbalance torque method of testing of flexural pivot, i.e., with the method for test rigid body displacement mutation, the party
Method assumes that swing system is a rigid body, establishes the equilibrium equation of rigid body by making rigid body switch to dynamic friction by stiction.
The test method of 4.1 unbalanced moments and friction moment
Shown in as shown in Figure 5, beam body lower part is flexural pivot, and jack 4, small mileage side are placed in big mileage direction in flexural pivot two sides
Place displacement meter 5.P1For the jacking force that jack 4 generates, MGFor swivel unbalanced moments (swivel unbalanced moments be mainly because
For reasons such as construction deviation, rotor system installation errors, swivel is caused to generate small center displacement to certain side from along bridge, from
And generate eccentricity), MZFor rotor flexural pivot friction moment.
In test process, P is adjusted1Size observes P by the reading of displacement meter 51Beam body change in displacement during change.
When displacement meter 5, which is read, to mutate, illustrate that flexural pivot produces minor rotation, then 4 jacking force P of jack at this time1What is generated is curved
Square P1L1, swivel unbalanced moments MG, rotor flexural pivot friction moment MZReach equilibrium,transient between three, wherein L1It is jacking force
P1From flexural pivot rotation Z axis to the distance vector in pushing tow force.Swivel unbalanced moments M can be found out by this equilibrium relationG、
Rotor flexural pivot friction moment MZ.Relationship is clear between this method each moment, and only considered the rigid body displacement of beam body rotation,
The more parameter of the influence factors such as beam body amount of deflection it is not related to, test result is accurate.
After steel Shu Zhangla is finished and is detached from bracket, entire rotor system weight is undertaken by flexural pivot, and girder is flat at this time
There are two types of situations for weighing apparatus:
(1) rotor flexural pivot friction moment Mz > rotor unbalanced moments MG
At this point, the Rigid Body in Rotation With around flexural pivot does not occur for beam body, the balance of system is uneven by flexural pivot friction moment and rotor
Weighing apparatus torque is kept.
First assume that rotor center of gravity is biased to small mileage side, implements top power P in big mileage side cushion cap1(see Fig. 1).As top power P1
The moment for making flexural pivot that minor rotation occur is progressively increased to, is had:
P1·L1+MG=MZ (4-1)
Jack 4 is set in small mileage side cushion cap again, applies top power P2(see Fig. 2).As top power P2It progressively increases to make flexural pivot
The moment that minor rotation occurs, have:
P2·L2=MG+MZ (4-2)
(4-1) and (4-2) are solved equation, is obtained,
Unbalanced moments MG:
Friction moment MZ:
(2) rotor flexural pivot friction moment Mz < rotor unbalanced moments MG
At this point, the Rigid Body in Rotation With around flexural pivot occurs for beam body, until support foot 6 participates in work, the balance of system is by flexural pivot frictional resistance
Torque, rotor unbalanced moments and support foot 6 keep the torque of the centre of sphere.
If rotor center of gravity is biased to small mileage side, in such cases, top power P can only be implemented in small mileage side cushion cap2(see figure
3).As top power P2(being counted by the liftoff moment of support foot 6) progressively increases to the moment for making flexural pivot that minor rotation occur, and has:
P2·L2=MG+MZ (4-5)
After jacking (flexural pivot generation minor rotation) in place, fall jack 4 after rise, if P'2It was gradually fallen after rise for jack 4
Power in journey when flexural pivot generation minor rotation, then
P'2·L2=MG-MZ (4-6)
(4-3) and (4-4) are solved equation, is obtained,
Unbalanced moments MG:
Friction moment MZ:
The calculating of the 4.2 flexural pivot coefficient of friction resistances and rotor eccentricity
The analytical calculation of rotor flexural pivot confficient of static friction.
When experiment of weighing, counterclockwise, small turn of clockwise direction occurs in the upright plane along beam axis for rotor flexural pivot
It is dynamic, i.e. the vertical transfer of minute angle.Friction moment is the frictional force on each micro- area of rubbing surface to flexural pivot center vertical transfer normal excessively
The sum of torque (see Fig. 4).O is flexural pivot center, O in Fig. 43For the center of circle of arbitrary section flat circle.
It is available by scheming: dM=LdF (4-9)
Wherein
DF=μz Pd (4-11)
DA=Rsin θ d β Rd θ (4-12)
So
Wherein, β ∈ [0,2 π]；
WhenWhen, substitution formula integrate available:
At this point,
WhenWhen,It is almost the same with the result of planar friction at this time, can be general, so, work as ball
It is bigger to cut with scissors radius surface, and when rise is smaller, i.e., it, can be by rubbing surface by plane approximation calculating when α is smaller.
According to research achievement and engineering practice, using tetrafluoroethene piece slideway 3 and the quiet coefficient of friction resistance of flexural pivot of butter is filled
It can be with following various with eccentricity are as follows:
The quiet coefficient of friction resistance of flexural pivot:
Rotor eccentricity:
In formula, R is flexural pivot central turnplate spherical radius；N is swivel weight.
4.3 test procedure
1. installing displacement meter and jack in selected section part；
2. adjusting jack, make the very heavy initial press state in setting of all jackings；
3. jack reinforces step by step, the micro-displacement of displacement meter is noted down, until displacement is mutated；
4. drawing out P- Δ load and displacement curve；
5. determining unbalanced moments, the coefficient of friction resistance, eccentricity；
6. determining balance weight, position and new eccentricity.
7. providing rotating body beam experiment of weighing report.
Specific embodiment:
(1) longitudinal weighing
45# pier T structure can generate biggish imbalance also due to there are 1.53% gradients in bridge longitudinal big mileage direction
Torque.When on-test, after the I-steel for slicing off temporary support, it is found that big mileage side support foot lands, at this time unbalanced moments
Greater than friction moment.Through theoretical calculation, should at pier center within the scope of big mileage 29m~31m counterweight 23t.After weighing for the first time,
It is practical that 45# pier T structure reaches balance, and support foot is all liftoff after big mileage direction 29m~31m range counterweight 18.4t, counterweight,
Unbalanced moments is less than moment of friction at this time.After completing counterweight, multiple title is carried out.Claiming result again, see Table 4 for details -2, and load and displacement are bent
Line is as shown in Figure 6 and Figure 7.
Table 4-2 45# pier T structure claims experimental test data again
It is analyzed from Fig. 6 and Fig. 7
Longitudinal unbalance torque MG:
Friction moment MZ:
The quiet coefficient of friction resistance of flexural pivot:
Rotor longitudinal direction eccentricity:
(2) laterally weighing
After longitudinal counterweight is complete, weigh to lateral.Lateral unbalanced moments is 814.61kNm, and quiet frictional resistance is
1890.11kNm, it is transversely eccentered to be biased to right side away from for 1.94cm, it does not need counterweight and is able to satisfy swivel balance to require.It is multiple to claim knot
Fruit is as follows:
Lateral unbalanced moments: MG=791.76kNm
Friction moment: MZ=1890.11kNm
The quiet coefficient of friction resistance of flexural pivot: μ=0.0315
Rotor is transversely eccentered away from e=1.94cm
45# pier T structure, which is longitudinally matched, focuses on pier center within the scope of big mileage direction 29m~31m uniformly with 18.6t, laterally not
Need counterweight.Result is claimed to summarize as shown in Table 5-1 again after counterweight.
Claim result again after table 5-1 counterweight
It can be obtained by longitudinal weighing, the quiet coefficient of friction resistance of 45# pier T structure is respectively 0.0311.Each T structure friction moment is greater than after counterweight
Respective unbalanced moments, 45# pier T structure longitudinal direction eccentricity is respectively 2.71cm, is biased to big mileage.
It can be obtained by laterally weighing, the quiet coefficient of friction resistance of 45# pier T structure is respectively 0.0315.Each T structure friction moment is greater than after counterweight
Respective unbalanced moments, 45# pier T structure is transversely eccentered away from respectively 1.95cm, is biased to right side.
Therefore, to can normally be turned after 45# pier T structure vertical and horizontal counterweight.
The jack as used in Fig. 8 to 10 present invention includes:
Jack ontology 401, the hollow cavity with upper surface opening；
Piston 402, is up-small and down-big step type, and the piston 402 is located at the cavity of the jack ontology 401
It is interior, the cavity of jack ontology 401 is divided into the type chamber 403 on top and the hydraulic cavities 404 of lower part, the jack ontology
401 have the first inlet 405 of perforation hydraulic cavities 404, and 402 lower part of piston has the ring shape first being recessed inwardly
Groove 406,406 notch of the first groove are connect by elastic plate 407 with 402 outer side seal of piston, and the piston 402 is gone to the bottom
Face has concave up the second sunken groove, is up big and down small step type, and second groove has close to the side of slot bottom
The ramp way 408 of the first groove 406 of multiple perforations, the channel 408 tilts down to the second groove along the first groove 406 and sets
It sets；
Top-pushing mechanism comprising I-shaped push block 409 and blocker ring 410,409 top of push block and middle part are matched
It together in the second groove, and can be slided up and down along the second groove, the second groove slot bottom and push block are filled out between 409 upper surface
Filled with liquid, 409 lower outside of push block is tightly connected 410 downside of blocker ring, is fixed on piston on the upside of blocker ring 410
402 bottom surfaces are located at the outside of 409 lower part of push block on the upside of the blocker ring 410, and the blocker ring 410 is high tensile flexible
Material is made.
In the above-mentioned technical solutions, piston 402 needs leakproofness preferable during sliding.When the hydraulic cavities of lower part
During 404 push piston 402 to move upwards by inlet feed liquor, the lower part of push block 409 is pushed upwards, thus band
The top of dynamic push block and middle part upward sliding, and then filled between the second groove slot bottom of promotion and 409 upper surface of push block
Liquid is filled along ramp way 408 into the first groove 406, after having filled liquid in the first groove 406, push block 409 after
During continuous upward sliding, the liquid in the first groove 406 is outwardly against elastic plate 407, so that elastic plate 407 slightly protrudes from
402 lateral surface of piston is transported to play the cavity inner wall for being close to jack ontology 401 and further function as in piston 402 upwards
Sealing function when dynamic.When laying down the pressure of hydraulic cavities 404, the liquid in the first groove 406 is because of gravity along channel
408 slide down in the second groove, and elastic plate 407 inside contracts at this time, and piston 402 can be moved down conveniently, while push block 409 also can
Automatic to fall, the blocker ring 410 that push block 409 connects can stop the liquid in hydraulic cavities 404 to enter in the second groove, stop
It is disposed remotely from 409 lower part of push block on the upside of ring 410 and is located at outside, during push block 409 moves up, automatically to external contracting
It is integrated, does not influence moving up for push block 409.It is larger that the material of blocker ring 410 is set as intensity, it is not easy to and it is damaged, while its
For flexible material, one is conveniently shortened into.Elastic plate 407 is made of elastic material, and wear-resisting.
In another technical solution, the elastic plate 407 includes outer layer, middle layer and internal layer, and the internal layer is elastic material
Matter, the outer layer are multiple Micro-v oids that wearable elastic material and outer layer have perforation middle layer, and the middle layer is sponge and is saturated with
Lubricating oil.During liquid in the first groove 406 squeezes elastic plate 407, internal layer plays the role of sealing, the sea in middle layer
Silk floss under squeezing action, in lubricating oil be flowed on 401 cavity inner wall of jack ontology by the Micro-v oid of outer layer, piston
402, which move up downslide, plays lubricating action in the process, also reduces the friction of elastic plate 407 Yu 401 cavity inner wall of jack ontology
Power.
In another technical solution, the jack ontology 401 also has the second inlet of perforation hydraulic cavities 404
411, first inlet 405 and the fixation of the second inlet 411 are communicated with the first inlet tube 413 and the second inlet tube 414,
The two nozzle is relatively arranged in hydraulic cavities 404, is provided with regulating valve between the first inlet tube 413 and the second inlet tube 414
412, the quartering is divided by sphere and wherein trisection is inwardly formed arc-shaped recess, what the regulating valve 412 was not recessed
The lucky salable firmly nozzle of the first inlet tube 413 or the second inlet tube 414 of one equal part, 412 center of regulating valve is fixed with
Rotation axis one end, rotation axis other end level are pierced by outside jack ontology 401 and are driven by driving mechanism and rotated, the rotation
Sealing ring is provided between 401 inner wall of axis and jack ontology.
It in the above-mentioned technical solutions, is to pass through by the size of the upward jacking force of multiple inlet adjusting pistons 402
What regulating valve 412 switched.The state that regulating valve 412 most starts is that the equal part that is not recessed is upward, and the two recess equal parts in left and right
414 nozzle of the first inlet tube 413 and the second inlet tube is respectively corresponded, the liquid in pipe can enter hydraulic cavities by arc-shaped recess
In 404, the larger jacking force by two hydraulic cylinders to piston 402 is realized.The interim damage of hydraulic cylinder in order to prevent simultaneously, shadow
Project progress is rung, alternative passes through 411 feed liquor of the first inlet 405 or the second inlet.By driving the rotation of rotation axis,
Rotation can block one of feed liquor nozzle respectively to the left or to the right.
In another technical solution, the equal part two sides that the regulating valve 412 is not recessed are provided with far from regulating valve 412
The upper side end of a pair of of the baffle 415 extended centrally out, first inlet tube 413 or the second inlet tube 414 has inside
The concave channel 416 of recess can accommodate baffle 415 when regulating valve 412 rotates just and pass through, first inlet tube 413 or the
The downside of two inlet tubes 414 has the third groove 417 being recessed inwardly, and matches just with baffle 415.In order to control to adjust
Amplitude when valve 412 turns right to the left is provided with a pair of of baffle 415, and on the first inlet tube 413 or the second inlet tube 414
Side is provided with the concave channel 416 in through tube, and lower section is provided with the third groove 417 of recess, for turning left, regulating valve
412 equal part a pair of the baffles 415 not being recessed are each passed through concave channel 416, and the baffle 415 of final lower section is sticked in third groove
In 417, the baffle 415 of top is matched with just in concave channel 416, and the nozzle on the so lucky salable firmly left side, liquid can only
Entered by the nozzle of right.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (6)
1. high-speed railway Curved Beam Bridge rotator construction out-of-balance force test method, which comprises the steps of:
Step 1: the preparation before test: main girder construction is completed, before support removing, the bypass road between the upper lower rotary table of flexural pivot
Position is symmetrically installed 4 400t jack about center of turntable, places 2 respectively along the big mileage side of beam body and small mileage side, together
When, 4 displacement meters are arranged in flexural pivot turntable bottom surrounding；
Step 2: after the I-steel for slicing off temporary support, big mileage side or small mileage side jack jacking force experiment of weighing: are adjusted
P1Size observes P by displacement meter1Beam body change in displacement during change；When the beam body displacement readings of displacement meter reaction occur
When mutation, illustrate that flexural pivot produces minor rotation, then jack jacking force P at this time1The moment of flexure P of generation1L1, swivel out-of-balance force
Square MG, rotor flexural pivot friction moment MZReach equilibrium,transient between three, swivel out-of-balance force is found out by this equilibrium relation
Square MG, rotor flexural pivot friction moment MZ, wherein L1It is jacking force P1From flexural pivot rotation Z axis to the distance vector in pushing tow force；
Step 3: drawing load and displacement curve, and calculate the flexural pivot coefficient of friction resistance, rotor eccentricity, then determining balance weight,
Position and new eccentricity；
The jack includes:
Jack ontology, the hollow cavity with upper surface opening；
Piston is up-small and down-big step type, and the piston is located in the cavity of the jack ontology, by jack sheet
The cavity of body is divided into the type chamber on top and the hydraulic cavities of lower part, and the jack ontology has the first feed liquor of perforation hydraulic cavities
Mouthful, the piston lower portion has first groove of ring shape being recessed inwardly, and the first groove notch passes through elastic plate and work
Side seal connects beyond the Great Wall, and the piston bottom surface has the second groove being recessed upwards, is up big and down small step type, described
Second groove has the ramp ways of the first groove of multiple perforations close to the side of slot bottom, and the channel is along the first groove to second
Groove tilts down setting；
Top-pushing mechanism comprising I-shaped push block and blocker ring, the push block top and middle part are matched with the second groove
It is interior, and can be slided up and down along the second groove, liquid, the top are filled between the second groove slot bottom and push block upper surface
Pushing block lower outside is tightly connected on the downside of blocker ring, and piston bottom surface is fixed on the upside of blocker ring, is located on the upside of the blocker ring
The outside of push block lower part, and the blocker ring is made for high tensile flexible material.
2. high-speed railway Curved Beam Bridge rotator construction out-of-balance force test method as described in claim 1, which is characterized in that institute
It states jack and turntable and two contact surface of lower cushion cap respectively places steel plate.
3. high-speed railway Curved Beam Bridge rotator construction out-of-balance force test method as described in claim 1, which is characterized in that beam
Body carries out longitudinal weigh respectively and weighs with lateral, turns unbalanced moments M to determineG, rotor flexural pivot friction moment MZAnd ball
Cut with scissors the coefficient of friction resistance, rotor eccentricity；In step 2, after the I-steel for slicing off temporary support, whether observation support foot lands, if
Support foot lands, and first carries out first time weighing, obtains the weight of actual needs clump weight, carries out counterweight and makes support foot all liftoff,
Then multiple title is carried out；If whole support foots do not land, counterweight is not needed, is directly weighed；Wherein, clump weight uses coagulation
Native folded plate.
4. high-speed railway Curved Beam Bridge rotator construction out-of-balance force test method as described in claim 1, which is characterized in that institute
Stating elastic plate includes outer layer, middle layer and internal layer, and the internal layer is elastic material, and the outer layer is wearable elastic material and outer layer has
There are multiple Micro-v oids in perforation middle layer, the middle layer is sponge and is saturated with lubricating oil.
5. high-speed railway Curved Beam Bridge rotator construction out-of-balance force test method as described in claim 1, which is characterized in that institute
Stating jack ontology also has the second inlet of perforation hydraulic cavities, first inlet and the fixed connection of the second inlet
Have the first inlet tube and the second inlet tube, the two nozzle is relatively arranged in hydraulic cavities, the first inlet tube and the second inlet tube it
Between be provided with regulating valve, the quartering is divided by sphere and wherein trisection is inwardly formed arc-shaped recess, the regulating valve
The lucky salable firmly nozzle of the first inlet tube or the second inlet tube of the equal part not being recessed, the regulating valve center, which is fixed with, to be turned
Moving axis one end, it is external and by driving mechanism driving rotation that rotation axis other end level is pierced by jack sheet, the rotation axis and
Sealing ring is provided between jack inner body wall.
6. high-speed railway Curved Beam Bridge rotator construction out-of-balance force test method as claimed in claim 5, which is characterized in that institute
It states the equal part two sides that regulating valve is not recessed and is provided with a pair of of the baffle extended centrally out far from regulating valve, first feed liquor
The upper side end of pipe or the second inlet tube has the concave channel being recessed inwardly, and baffle is logical when can accommodate regulating valve rotation just
It crosses, the downside of first inlet tube or the second inlet tube has the third groove being recessed inwardly, and matches just with baffle.
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| CN109990755B (en) * | 2019-04-02 | 2020-11-06 | 石家庄铁道大学 | Vehicle-curve bridge coupling system power experimental equipment and method |
| CN110761187B (en) * | 2019-09-19 | 2021-08-13 | 济南北环铁路有限公司 | Active control method for bridge horizontal rotation construction |
| CN111441261B (en) * | 2020-04-01 | 2022-03-11 | 中铁十八局集团第五工程有限公司 | Device for automatically compensating jacking force of multi-point combined weighing beam end of super-tonnage swivel bridge |
| CN112985565A (en) * | 2021-02-03 | 2021-06-18 | 中铁工程设计咨询集团有限公司 | Bridge weighing method |
| CN113916431B (en) * | 2021-11-03 | 2023-06-23 | 哈尔滨飞机工业集团有限责任公司 | Method and device for measuring unbalanced force and friction force of helicopter control device |
| CN115369778A (en) * | 2022-07-21 | 2022-11-22 | 中铁一局集团(广州)建设工程有限公司 | Construction method of steel cross beam rotating body structure |
| CN116720348B (en) * | 2023-06-02 | 2023-11-28 | 中铁十二局集团第七工程有限公司 | Method for calculating unbalanced moment of cast-in-situ swivel bridge of bracket based on critical point displacement monitoring |
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| CN201962023U (en) * | 2011-01-20 | 2011-09-07 | 上海天演建筑物移位工程有限公司 | Jack for jacking ultrathin bridge |
| CN103482521B (en) * | 2013-10-17 | 2015-12-09 | 中国核工业华兴建设有限公司 | A kind of steel strand tension jack |
| CN105507163B (en) * | 2015-11-26 | 2017-06-16 | 中铁四局集团建筑工程有限公司 | Equipment and detection method for turning bridge experiment of weighing critical point differentiation |
| CN106758831B (en) * | 2016-12-14 | 2018-09-21 | 中铁十九局集团第二工程有限公司 | Across railway bridge swivel continuous beam construction method |
| CN106836010A (en) * | 2017-03-31 | 2017-06-13 | 中铁二院工程集团有限责任公司 | A kind of Deck Arch Bridges imbalance horizontal swing system and rotation swivel construction method |
| CN206648769U (en) * | 2017-04-28 | 2017-11-17 | 重庆交大建设工程质量检测中心有限公司 | A kind of anchor lower prestress detector |
| CN106958254A (en) * | 2017-05-08 | 2017-07-18 | 中铁七局集团第四工程有限公司 | Latch steel pipe and reinforced concrete combination pile cofferdam and its construction method |
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