CN113245785A - Regeneration and repair method for waveform beam of guardrail - Google Patents

Regeneration and repair method for waveform beam of guardrail Download PDF

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Publication number
CN113245785A
CN113245785A CN202110589143.0A CN202110589143A CN113245785A CN 113245785 A CN113245785 A CN 113245785A CN 202110589143 A CN202110589143 A CN 202110589143A CN 113245785 A CN113245785 A CN 113245785A
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wave
corrugated
straightening
hydraulic jack
shaped beam
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CN202110589143.0A
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CN113245785B (en
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丁晓伟
陈锦华
周一勤
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Zhejiang Luotong Transport Safety Facilities Co ltd
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Zhejiang Luotong Transport Safety Facilities Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects

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Abstract

The invention discloses a regeneration repairing method of a guardrail wave-shaped beam, which can regenerate and repair the slightly damaged wave-shaped beam such as a bent wave-shaped beam, a convex point wave-shaped beam and the like detached in traffic accidents and road maintenance reconstruction on the basis of strict inspection, detection and evaluation through the procedures of straightening and correction, chemical degreasing and passivation, plastic coating dipping and spraying and the like. Furthermore, the self-luminous material powder of alkaline earth aluminate and the like is added into the plastic raw material for dipping and spraying the plastic coating, and the self-luminous material powder can continuously emit light for more than 12 hours in the dark, thereby not only improving the convenience and safety of people going out at night, but also beautifying the environment. Therefore, the regeneration and regeneration method for the guardrail corrugated beam is convenient to operate, low in cost, safe, reliable and high in resource utilization rate, can effectively improve the regeneration and regeneration effects of the guardrail corrugated beam, and has high economic and social benefits.

Description

Regeneration and repair method for waveform beam of guardrail
Technical Field
The invention relates to a method for repairing road safety facilities, in particular to a method for regenerating and repairing a corrugated beam of a guardrail.
Background
The guardrail corrugated beam is a continuous structure formed by mutually splicing corrugated steel plates and supported by upright posts, adopts different specifications according to different highway grades, is arranged at the road side and the central dividing strip and mainly aims to prevent out-of-control vehicles from rushing out of a road. The guard rail wave beam is divided into two waves and three waves, has the thickness of 3mm or 4mm, and is generally protected by a single coating and a composite coating, wherein the coatings are zinc, plastic and the like. Road traffic accidents can cause fracture, distortion, bending and local concave deformation of the guardrail corrugated beam, the guardrail corrugated beam needs to be replaced and updated during road upgrading and maintenance transformation, and a large number of guardrail corrugated beams can be regenerated and restored on the basis of strict inspection, detection and evaluation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a regeneration and repair method for a corrugated guardrail beam, which has the advantages of convenience in operation, low cost, safety, reliability, high resource utilization rate and environment beautification.
The technical problem of the invention is realized by the following technical scheme:
a regeneration and repair method for a waveform beam of a guardrail comprises the following steps:
step one, visual inspection, detection and evaluation of old corrugated beams
Figure 100002_DEST_PATH_IMAGE003
Through visual inspection and simple measurement, the old corrugated beam is classified, namely, the waste is recycled and repaired and regenerated:
the first type: the corrugated beam has serious damage such as distortion, breakage and serious fracture, so that the corrugated beam can not be used again generally and can be treated by a furnace return method or other methods;
the second type: the corrugated beam is generally repaired and recycled through welding if minor fracture exists;
in the third category: slightly bending the wave-shaped beam and locally sinking and deforming to form the convex point wave-shaped beam, and repairing and regenerating for reuse;
Figure 100002_DEST_PATH_IMAGE005
the second and third types of wave beams are detected in detail and evaluated according to relevant standard regulations, so that the wave beams can be repaired and recycled;
step two, straightening and correcting the corrugated beam through straightening and correcting machinery
Figure 186589DEST_PATH_IMAGE003
The straightening and correcting machine consists of a clamp, a hydraulic jack, a matched rigid base plate and a matched rigid cushion block, wherein the clamp, the hydraulic jack, the matched rigid base plate and the matched rigid cushion block are used for straightening and correcting the bent corrugated beam and the convex point corrugated beam which is locally convex;
Figure 832334DEST_PATH_IMAGE005
selecting the type and specification of the hydraulic jack according to the detection data, and manufacturing a plurality of rigid base plates and a plurality of rigid cushion blocks;
Figure 100002_DEST_PATH_IMAGE007
determining the control and detection requirements of mechanical straightening and correcting operation according to the detection data of the bent waveform beam and the convex-point waveform beam;
Figure DEST_PATH_IMAGE009
the two clamps are provided with a bending wave-shaped beam or a salient point wave-shaped beam in a clamping manner, and the bending point of the bending wave-shaped beam is measured
Figure DEST_PATH_IMAGE010
And the distance between the bending point and the two clamps or the salient point of the wave-shaped beam is measured
Figure 100002_DEST_PATH_IMAGE011
And the distance from the salient point to the two clamps;
installing an automatic distance detector, and automatically detecting and recording the pressurizing stroke of the hydraulic jack;
Figure 100002_DEST_PATH_IMAGE013
selecting andbending a rigid base plate with the same width as the corrugated beam or a rigid base plate and a rigid cushion block which are matched with the convex points of the convex point corrugated beam in size, installing and adjusting the position of a hydraulic jack, preliminarily jacking the bending part of the bent corrugated beam or the convex point of the convex point corrugated beam, starting the hydraulic jack, and automatically detecting and recording the initial value of the pressurizing stroke of the hydraulic jack;
Figure DEST_PATH_IMAGE015
the hydraulic jack slowly continues to jack until the jacking stroke of the hydraulic jack reaches
Figure DEST_PATH_IMAGE016
Or
Figure 100002_DEST_PATH_IMAGE017
Holding the lotus for 1-2 min;
Figure 100002_DEST_PATH_IMAGE019
the hydraulic jack cylinder returns oil slowly, when the jacking stroke of the hydraulic jack is recovered
Figure 174060DEST_PATH_IMAGE010
Or
Figure 690492DEST_PATH_IMAGE011
Stopping oil return and holding the load for 1-2 min;
Figure 100002_DEST_PATH_IMAGE021
the hydraulic jack cylinder continues to slowly return oil, and the jacking stroke of the hydraulic jack returns to the initial value;
Figure DEST_PATH_IMAGE023
removing the hydraulic jack, and detecting the straightening or correcting effect at the bending part of the bent corrugated beam or the convex point of the convex point corrugated beam, wherein the straightening or correcting effect is required to meet the standard requirement;
such as straightening or straightening of corrugated beamsThe processing method which does not meet the standard requirement comprises the following steps: the straightening or correcting effect is not achieved
Figure DEST_PATH_IMAGE024
Or
Figure DEST_PATH_IMAGE025
Un-straightened or corrected, the bent wave-shaped beam or the convex point wave-shaped beam is detached, laid flat and kept stand for 30 to 50min, and the detection is carried out again
Figure 712501DEST_PATH_IMAGE024
Or
Figure 845542DEST_PATH_IMAGE025
Setting the jacking stroke of the hydraulic jack
Figure DEST_PATH_IMAGE026
Or
Figure DEST_PATH_IMAGE027
Value, again according to step two
Figure DEST_PATH_IMAGE029
～
Figure 679374DEST_PATH_IMAGE023
Straightening or correcting the wave-shaped beam; removing the bent wave-shaped beam or the salient point wave-shaped beam beyond the straightening or correcting effect, keeping flat and standing for 30-50 min, and detecting again
Figure 581471DEST_PATH_IMAGE024
Or
Figure 796552DEST_PATH_IMAGE025
Reversely installing and clamping the bent corrugated beam or the convex point corrugated beam, and setting the jacking stroke of the hydraulic jack
Figure DEST_PATH_IMAGE030
Or
Figure DEST_PATH_IMAGE031
Value, again according to step two
Figure 541523DEST_PATH_IMAGE029
～
Figure 195358DEST_PATH_IMAGE023
Straightening or correcting the beam;
step three, chemical degreasing of the corrugated beam
Figure 951962DEST_PATH_IMAGE003
A stirring water pump is arranged in the chemical degreasing tank, 5-7% of degreasing agent is added into the chemical degreasing tank, and the water temperature is 40-50 ℃;
Figure 665840DEST_PATH_IMAGE005
placing the wave-shaped beam qualified through straightening or correction detection into a chemical degreasing pool, wherein the liquid level of the mixed liquid of pool water and degreasing agent is 10-20 cm higher than that of the wave-shaped beam;
Figure 779332DEST_PATH_IMAGE007
starting a stirring water pump, degreasing for 15-20 min, and removing oil stain attachments on the surface of the corrugated beam;
Figure 971279DEST_PATH_IMAGE009
hoisting the degreased corrugated beams out of the chemical degreasing tank one by using a crane, washing the degreased corrugated beams clean by using a strong spray, and airing or drying the degreased corrugated beams;
step four, passivating the corrugated beam
Figure 644706DEST_PATH_IMAGE003
Adding 3-5% of passivator into the chemical passivation tank, and keeping the water temperature at 50-55 ℃;
Figure 529486DEST_PATH_IMAGE005
degreasing, washing, air drying or dryingThe corrugated beam is hung in a chemical passivation tank, and the liquid level of the mixed liquid of the tank water and the passivating agent is 10-20 cm higher than that of the corrugated beam;
Figure 858836DEST_PATH_IMAGE007
starting a stirring water pump, and passivating for 20-30 min;
Figure 854474DEST_PATH_IMAGE009
hoisting the passivated wave-shaped beams out of the chemical passivation pool one by using a crane, and airing or drying again;
step five, dipping and spraying the plastic coating
Selecting a plastic dipping coating or a plastic spraying coating according to the needs of customers, adopting a professional plastic dipping coating device or a plastic spraying coating device to dip the plastic coating or the plastic spraying coating, detecting the coating by a coating thickness gauge to be qualified, and transporting the coating to a construction site to install a regenerated and repaired corrugated beam; or 10-30 percent of alkaline earth aluminate self-luminous material powder with 600-800 meshes can be added into the plastic raw material for dipping and spraying the plastic coating;
step six, installation and construction
Figure 585669DEST_PATH_IMAGE003
Inspecting the quality of the regenerated and repaired finished product of the waveform beam of the guardrail, packaging the product in an anti-collision and anti-abrasion manner, and transporting the product to a construction site;
Figure 641350DEST_PATH_IMAGE005
and installing a regeneration and repair finished product of the guardrail corrugated beam on the guardrail column which is straightened and regulated and has the height meeting the requirement, wherein the installation quality meets the design requirement.
The straightening and correcting machine leaves the bending point of the bent wave-shaped beam
Figure DEST_PATH_IMAGE032
At a certain distance
Figure DEST_PATH_IMAGE033
To treat and
Figure DEST_PATH_IMAGE034
clamping with a clamp, deviating from the clamp
Figure DEST_PATH_IMAGE035
Connecting wire
Figure 113788DEST_PATH_IMAGE010
Bending point
Figure 913117DEST_PATH_IMAGE032
Hydraulic jack for office
Figure DEST_PATH_IMAGE036
Point of bending
Figure 357874DEST_PATH_IMAGE032
Slowly jacking in the opposite direction until the initial deviation
Figure DEST_PATH_IMAGE037
Connecting wire
Figure DEST_PATH_IMAGE038
Ending of distance, i.e. bending wave beam axis
Figure 992247DEST_PATH_IMAGE037
To recurved wave-shaped beam
Figure DEST_PATH_IMAGE039
Axial, backward bending wave-shaped beam after removing hydraulic jack
Figure 92927DEST_PATH_IMAGE039
Axis rebounding elasticity to straightening wave-shaped beam
Figure DEST_PATH_IMAGE040
An axis; the local convex point waveform beam is composed of clamp and hydraulic jack
Figure DEST_PATH_IMAGE041
And associated rigid padsStraightening and correcting machine for correcting local convex points
Figure DEST_PATH_IMAGE042
Equal distance between two sides
Figure DEST_PATH_IMAGE043
Is clamped by a clamp and deviates
Figure 86160DEST_PATH_IMAGE043
Connecting wire
Figure 791948DEST_PATH_IMAGE011
Local salient point
Figure 189431DEST_PATH_IMAGE042
Hydraulic jack for office
Figure 777407DEST_PATH_IMAGE041
Point of protrusion
Figure 918538DEST_PATH_IMAGE042
Slowly jacking in the opposite direction until the initial deviation
Figure DEST_PATH_IMAGE044
Connecting wire
Figure 275570DEST_PATH_IMAGE017
Distance termination to make salient point wave beam axis
Figure 109534DEST_PATH_IMAGE044
To the inverted concave corrugated beam
Figure DEST_PATH_IMAGE045
Axis, dismounting hydraulic jack rear salient point wave beam
Figure 856910DEST_PATH_IMAGE045
Axis rebounding elasticity to correct wave beam
Figure DEST_PATH_IMAGE046
Axial line。
The bent wave-shaped beam is straightened, the bent wave-shaped beam is assumed to be a two-end fixed beam fixed on a two-end clamp and leaves a bending point of the bent wave-shaped beam
Figure 869909DEST_PATH_IMAGE032
At a certain distance
Figure 19130DEST_PATH_IMAGE033
To treat and
Figure 23996DEST_PATH_IMAGE034
the part is clamped by a clamp, and the pressure of a hydraulic jack acts at the bending point
Figure 524247DEST_PATH_IMAGE036
The thickness, the moment of inertia and the elastic modulus of the bent corrugated beam are respectively
Figure DEST_PATH_IMAGE047
And then, the stress of the bent corrugated beam is calculated by a formula I:
formula I,
Figure DEST_PATH_IMAGE048
Correcting the local convex point wave-shaped beam, and assuming that the local convex point of the convex point wave-shaped beam is in a spherical crown shell shape, the central diameter of the cross section of the bottom surface of the spherical crown shell is
Figure DEST_PATH_IMAGE049
I.e. the bottom surface of the spherical crown shell
Figure DEST_PATH_IMAGE050
The radius of curvature of the spherical crown shell of the convex point wave-shaped beam is
Figure DEST_PATH_IMAGE051
And the radius of curvature of the spherical crown shell of the anti-concave wave beam are
Figure DEST_PATH_IMAGE052
Spherical crown shellBottom surface
Figure 584345DEST_PATH_IMAGE050
With respective side clamps
Figure DEST_PATH_IMAGE053
At a distance of
Figure DEST_PATH_IMAGE054
The rise of the spherical crown shell is
Figure 243865DEST_PATH_IMAGE011
Two-part clamp
Figure 154052DEST_PATH_IMAGE053
The distance between the two beams is the width of the wave beam
Figure DEST_PATH_IMAGE055
Top of spherical crown shell
Figure DEST_PATH_IMAGE056
Acting on the pressure of a hydraulic jack
Figure 57112DEST_PATH_IMAGE041
Bottom of spherical crown shell
Figure 343737DEST_PATH_IMAGE056
A rigid cushion block is arranged on the pad, the rigid cushion block is hollow, and the hollow radius is
Figure DEST_PATH_IMAGE057
Radius of center of cross section of bottom surface of spherical crown shell
Figure DEST_PATH_IMAGE058
Big (a)
Figure DEST_PATH_IMAGE059
I.e. by
Figure DEST_PATH_IMAGE060
The shape of one side of the rigid cushion block, which is contacted with the wave-shaped beam, is the same as that of the wave-shaped beam, and the other side is a plane,placing on a working platform; assuming rigid pad hollow edge
Figure DEST_PATH_IMAGE061
For consolidation, the pressure of the local convex point waveform beam on the hydraulic jack is corrected according to the principles of elasticity mechanics, force balance and function conservation theorem
Figure 920080DEST_PATH_IMAGE041
Under the action, the section stress is calculated by a formula II:
the second formula,
Figure DEST_PATH_IMAGE062
The symbols in the formula I and the formula II are defined as follows:
Figure 329065DEST_PATH_IMAGE058
-bump wave beam
Figure 600646DEST_PATH_IMAGE056
And an inverted concave corrugated beam
Figure 100002_DEST_PATH_IMAGE063
The center radius of the section of the bottom surface of the spherical crown shell,
Figure DEST_PATH_IMAGE064
；
Figure DEST_PATH_IMAGE065
half width of the wave beam, i.e. two clamps
Figure 612334DEST_PATH_IMAGE043
The distance between the two electrodes is half of the distance between the two electrodes,
Figure 528337DEST_PATH_IMAGE064
；
Figure DEST_PATH_IMAGE066
-bottom surface section edge of convex point wave beam and concave wave beam spherical crown shell
Figure DEST_PATH_IMAGE067
To the clamp
Figure DEST_PATH_IMAGE068
The distance of (a) to (b),
Figure 504295DEST_PATH_IMAGE064
；
Figure DEST_PATH_IMAGE069
-the thickness of the wave-shaped beam,
Figure 263173DEST_PATH_IMAGE064
；
Figure DEST_PATH_IMAGE070
-the hollow radius of the rigid cushion block for correcting the convex point wave-shaped beam is larger than the central radius of the section of the bottom surface of the spherical crown shell
Figure 953917DEST_PATH_IMAGE058
Large size, i.e.
Figure DEST_PATH_IMAGE071
The distance between the two or more of the two or more,
Figure 52323DEST_PATH_IMAGE064
；
Figure 475214DEST_PATH_IMAGE051
the curvature radius of the spherical crown shell of the convex point wave-shaped beam,
Figure 924650DEST_PATH_IMAGE064
；
Figure 356768DEST_PATH_IMAGE052
-radius of curvature of spherical shell of anti-concave wave beam,
Figure 309681DEST_PATH_IMAGE064
；
Figure 903473DEST_PATH_IMAGE057
-the hollow radius of the rigid spacer block,
Figure 574626DEST_PATH_IMAGE060
，
Figure 607173DEST_PATH_IMAGE064
；
Figure DEST_PATH_IMAGE072
respectively a bent wave-shaped beam
Figure 760066DEST_PATH_IMAGE032
And recurved wave shaped beam
Figure DEST_PATH_IMAGE073
To the clamp
Figure 587077DEST_PATH_IMAGE033
Or holders for
Figure 745526DEST_PATH_IMAGE034
The distance between the two or more of (a) and (b),
Figure 191550DEST_PATH_IMAGE064
；
Figure 119055DEST_PATH_IMAGE010
-bent wave beam
Figure 54650DEST_PATH_IMAGE032
And recurved wave shaped beam
Figure 700395DEST_PATH_IMAGE073
To the clamp
Figure DEST_PATH_IMAGE074
The distance between the connecting lines is greater than the distance between the connecting lines,
Figure 871482DEST_PATH_IMAGE064
；
Figure 919073DEST_PATH_IMAGE070
the difference between the radius of the bottom section of the spherical crown shell of the concave-inverted wave beam and the radius of the bottom section of the spherical crown shell of the convex-point wave beam,
Figure 25569DEST_PATH_IMAGE064
；
Figure 158610DEST_PATH_IMAGE011
-bump wave beam
Figure DEST_PATH_IMAGE075
And an inverted concave corrugated beam
Figure 8754DEST_PATH_IMAGE063
To the clamp
Figure DEST_PATH_IMAGE076
The distance between the connecting lines is greater than the distance between the connecting lines,
Figure 973168DEST_PATH_IMAGE064
；
Figure DEST_PATH_IMAGE077
-the modulus of elasticity of the wave beam,
Figure DEST_PATH_IMAGE078
；
Figure DEST_PATH_IMAGE079
moment of inertia of bent and reverse bent wave beam sections，
Figure DEST_PATH_IMAGE080
；
Figure DEST_PATH_IMAGE081
The maximum pressure value of the jack pressure required for straightening the bent wave-shaped beam is determined by calculation or tests,
Figure DEST_PATH_IMAGE082
；
Figure DEST_PATH_IMAGE083
the maximum pressure value of the jack pressure required by correcting the convex point corrugated beam is determined by calculation or tests,
Figure 895906DEST_PATH_IMAGE082
；
Figure DEST_PATH_IMAGE084
-poisson's ratio of the corrugated beam material, dimensionless;
Figure DEST_PATH_IMAGE085
convex point wave beam spherical crown shell bottom arc length
Figure DEST_PATH_IMAGE086
Half of the corresponding central angle of the circle,
Figure DEST_PATH_IMAGE087
；
Figure DEST_PATH_IMAGE088
arc length of bottom surface of spherical crown shell of anti-concave wave beam
Figure DEST_PATH_IMAGE089
Half of the corresponding central angle of the circle,
Figure 890144DEST_PATH_IMAGE087
；
Figure DEST_PATH_IMAGE090
respectively of a reverse-curved wave-shaped beam
Figure DEST_PATH_IMAGE091
Pressure of jack
Figure 934193DEST_PATH_IMAGE036
The bending moment under the action of the bending moment,
Figure DEST_PATH_IMAGE092
；
Figure DEST_PATH_IMAGE093
-the center of the section of the bottom surface of the spherical crown shell of the anti-concave wave beam
Figure DEST_PATH_IMAGE094
To be provided with
Figure DEST_PATH_IMAGE095
Is unit arc length section tension, shearing force and bending moment of radius,
Figure DEST_PATH_IMAGE096
；
Figure DEST_PATH_IMAGE097
the allowable tensile force, the allowable shearing force and the allowable bending moment of the section of the inverse bending wave-shaped beam respectively,
Figure DEST_PATH_IMAGE098
；
Figure DEST_PATH_IMAGE099
-the center of the section of the bottom surface of the spherical crown shell of the anti-concave wave beam
Figure 855576DEST_PATH_IMAGE094
To be provided with
Figure 569454DEST_PATH_IMAGE095
Is the allowable tensile force, the allowable shearing force and the allowable bending moment of a unit arc length section of the radius,
Figure 677087DEST_PATH_IMAGE096
。
the straightening and correcting machine is used for straightening and correcting bent corrugated beams and correcting salient point corrugated beams, when a hydraulic jack applies pressure, the hydraulic jack needs to be slowly loaded step by step, sudden or impact application is avoided, the stroke of the hydraulic jack is automatically measured, and the total stroke is not suitable to exceed the total stroke
Figure 134613DEST_PATH_IMAGE016
Or
Figure 745723DEST_PATH_IMAGE017
After the hydraulic jack is detached, the rebound quantity of the straightened bent wave-shaped beam and the corrected convex point wave-shaped beam is detected to meet the requirement and meet the standard specified by the specification.
The rigid base plate with the same width as the bent corrugated beam is required to be arranged at the contact part of the hydraulic jack and the bent corrugated beam for straightening the bent corrugated beam, so that the whole section of the bent corrugated beam is straightened; the shape of one side of the rigid backing plate, which is contacted with the wave-shaped beam, needs to be the same as that of the wave-shaped beam, the other side of the rigid backing plate is a plane, and the jack acts on the central point of the rigid backing plate; the convex point waveform beam is corrected, a rigid cushion block is required to be arranged at the contact part of the jack and the convex point waveform beam, and the convex height of the convex point is detected in advance
Figure DEST_PATH_IMAGE100
And the central radius of the section of the bottom surface of the spherical crown shell
Figure DEST_PATH_IMAGE101
Selecting the size and the shape of a proper rigid cushion block; the rigid cushion block is hollow, and the hollow radius is larger than the central radius of the section of the bottom surface of the spherical crown shell
Figure 348612DEST_PATH_IMAGE101
Big (a)
Figure DEST_PATH_IMAGE102
The shape of one side of the rigid cushion block, which is in contact with the corrugated beam, needs to be the same as that of the corrugated beam, the other side of the rigid cushion block is a plane, one side of the plane is placed on the working platform, and the jack acts on the central point of the salient point corrugated beam.
The clamps are a pair of tools for clamping the wavy beam to be straightened and bent and correcting the wavy beam with convex points, the middle part of each clamp is provided with a loading hydraulic jack, and the distance between the two clamps is the straightening and bending wavy beam
Figure DEST_PATH_IMAGE103
Convex point waveform correcting beam
Figure DEST_PATH_IMAGE104
(ii) a The jack is driven by hydraulic pressure; the two clamps and the hydraulic jack need to be provided with a firm and stable supporting mechanism, and the supporting mechanism cannot deform or move when the corrugated beam is straightened and bent and the convex point corrugated beam is corrected.
Compared with the prior art, the invention mainly provides a regeneration and repair method for the guardrail corrugated beam, which can regenerate and repair the slightly damaged corrugated beam such as a bent corrugated beam, a convex point corrugated beam and the like detached in traffic accidents and road maintenance reconstruction on the basis of strict inspection, detection and evaluation through the procedures of straightening and correction, chemical degreasing and passivation, plastic coating dipping and spraying and the like. Furthermore, the self-luminous material powder of alkaline earth aluminate and the like is added into the plastic raw material for dipping and spraying the plastic coating, and the self-luminous material powder can continuously emit light for more than 12 hours in the dark, thereby not only improving the convenience and safety of people going out at night, but also beautifying the environment. Therefore, the regeneration and regeneration method for the guardrail corrugated beam is convenient to operate, low in cost, safe, reliable and high in resource utilization rate, can effectively improve the regeneration and regeneration effects of the guardrail corrugated beam, and has high economic and social benefits.
Drawings
FIG. 1 is a flow chart of the method steps of the present invention.
Fig. 2 is an elevation view of a bent wave-shaped beam and a force calculation diagram.
Fig. 3 is an elevation view of a bump wave beam and a force calculation diagram.
Fig. 4 is a top view and computational diagram of fig. 3.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the above drawings.
As shown in figures 1-4, 1, a corrugated beam, 11, a bent corrugated beam, 12, a reversely bent corrugated beam, 13, a straightened corrugated beam, 14, a convex corrugated beam, 15, a reversely concave corrugated beam, 16, a corrected corrugated beam, 2, a clamp, 21, a rigid cushion plate, 22, a rigid cushion block, 3, a hydraulic jack, 4, a chemical degreasing passivation tank, 5, a plastic coating dipping and spraying device and 6, a coating thickness gauge are adopted.
A regeneration and repair method for waveform beams of guardrails is mainly used for regenerating and repairing slightly damaged waveform beams 1 such as bent waveform beams 11 and salient point waveform beams 14 detached in traffic accidents and road maintenance reconstruction, and the operation steps of the repair method are as shown in figure 1:
step one, visual inspection, detection and evaluation of old corrugated beams
Figure 542876DEST_PATH_IMAGE003
And (3) performing quality evaluation classification on the old corrugated beam through visual inspection and simple measurement, namely scrap melting and repair regeneration:
the first type: the corrugated beam 1 can not be reused generally due to serious damage such as distortion, breakage, serious fracture and the like, and can be processed by a furnace return method or other methods;
the second type: the corrugated beam 1 can be repaired and reused again through welding if slight fracture exists;
in the third category: slightly bending the corrugated beam 11 and locally sinking and deforming the corrugated beam 14, namely repairing and regenerating the corrugated beam and then reusing the corrugated beam;
Figure 804093DEST_PATH_IMAGE005
the second and third types of wave beams are detected in detail and evaluated according to relevant standard regulations, so that the wave beams can be repaired and recycled;
step two, straightening and correcting the corrugated beam through straightening and correcting machinery
Figure 269709DEST_PATH_IMAGE003
The straightening and correcting machine consists of a clamp 2, a hydraulic jack 3, a matched rigid base plate 21 and a matched rigid cushion block 22, the clamp 2, the hydraulic jack 3, the matched rigid cushion plate 21 and the matched rigid cushion block 22 are used for straightening and correcting the bent waveform beam 11 and the convex point waveform beam 14 which is partially raised, the hydraulic jack 3 is used for applying straightening and correcting pressure according to detection data, the strength of the waveform beam under the action of the straightening and correcting pressure is met, and the bent waveform beam 11 and the convex point waveform beam 14 need to meet the straightening and correcting strength requirement of the straightening and correcting machine;
Figure 918865DEST_PATH_IMAGE005
selecting the model and specification of the hydraulic jack 3 and manufacturing a plurality of rigid base plates 21 and a plurality of rigid cushion blocks 22 according to the detection data;
Figure 407615DEST_PATH_IMAGE007
determining the control and detection requirements of mechanical straightening and correcting operation according to the detection data of the bent waveform beam 11 and the convex-point waveform beam 14;
Figure 206944DEST_PATH_IMAGE009
two clamps 2 are provided with a clamping bending wave-shaped beam 11 or a salient point wave-shaped beam 14, and the bending point of the bending wave-shaped beam 11 is measured
Figure 792646DEST_PATH_IMAGE010
And the distance between the bending point and the two clamps 2, or measuring the salient point of the salient point wave-shaped beam 14
Figure 284808DEST_PATH_IMAGE011
And the distance from the salient point to the two clamps 2;
Figure 323171DEST_PATH_IMAGE029
installing an automatic distance detector, and automatically detecting and recording the pressurizing stroke of the hydraulic jack 3;
Figure 926190DEST_PATH_IMAGE013
selecting a rigid base plate 21 and a rigid cushion block 22 which are matched with the rigid base plate 21 or the salient point corrugated beam 14 with the same width as the bent corrugated beam 11 in size, installing and adjusting the position of the hydraulic jack 3, preliminarily jacking the bent part of the bent corrugated beam 11 or the salient point of the salient point corrugated beam 14, starting the hydraulic jack 3, and automatically detecting and recording the initial value of the pressurizing stroke of the hydraulic jack 3;
Figure 366399DEST_PATH_IMAGE015
the hydraulic jack 3 is slowly pushed in continuously until the jacking stroke of the hydraulic jack reaches
Figure 29462DEST_PATH_IMAGE016
Or
Figure 555121DEST_PATH_IMAGE017
Holding the lotus for 1-2 min;
Figure 696252DEST_PATH_IMAGE019
the oil cylinder 3 of the hydraulic jack returns oil slowly, and when the jacking stroke of the hydraulic jack returns to
Figure 539704DEST_PATH_IMAGE010
Or
Figure 842509DEST_PATH_IMAGE011
Stopping oil return and holding the load for 1-2 min;
Figure 121044DEST_PATH_IMAGE021
the oil cylinder of the hydraulic jack 3 continues to return oil slowly, and the jacking stroke of the hydraulic jack returns to the initial value;
Figure 65866DEST_PATH_IMAGE023
the hydraulic jack 3 is removed, the straightening or correcting effect at the bending part of the bent corrugated beam 11 or the convex point of the convex point corrugated beam 14 is detected, and the straightening or correcting effect is required to meet the standard requirement;
if the straightening or straightening of the corrugated beam 1 does not meet the standard requirement, the processing method comprises the following steps: the straightening or correcting effect is not achieved
Figure 480667DEST_PATH_IMAGE024
Or
Figure 751111DEST_PATH_IMAGE025
Un-straightened or corrected, the bent wave-shaped beam 11 or the convex point wave-shaped beam 14 is detached, laid flat and kept stand for 30 to 50min, and the detection is carried out again
Figure 251363DEST_PATH_IMAGE024
Or
Figure 734297DEST_PATH_IMAGE025
Setting the jacking stroke of the hydraulic jack 3
Figure 597079DEST_PATH_IMAGE026
Or
Figure 179370DEST_PATH_IMAGE027
Value, again according to step two
Figure 494814DEST_PATH_IMAGE029
～
Figure 453543DEST_PATH_IMAGE023
Straightening or correcting the corrugated beam 1; removing the bent corrugated beam 11 or the convex point corrugated beam 14 beyond the straightening or correcting effect, keeping flat and standing for 30-50 min, and detecting again
Figure 842936DEST_PATH_IMAGE024
Or
Figure 189603DEST_PATH_IMAGE025
Reversely installing and clamping the bent wave-shaped beam 11 or the convex point wave-shaped beam 14, and setting the jacking stroke of the hydraulic jack 3
Figure 664447DEST_PATH_IMAGE030
Or
Figure 489184DEST_PATH_IMAGE031
Value, again according to step two
Figure 738943DEST_PATH_IMAGE029
～
Figure 256512DEST_PATH_IMAGE023
Straightening or correcting the corrugated beam 1;
step three, chemical degreasing of the corrugated beam
Figure 218651DEST_PATH_IMAGE003
A stirring water pump is arranged in the chemical degreasing tank, 5-7% of degreasing agent is added into the chemical degreasing tank, and the water temperature is 40-50 ℃;
Figure 847079DEST_PATH_IMAGE005
placing the wave-shaped beam 1 qualified through straightening or correction detection into a chemical degreasing pool, wherein the liquid level of the pool water and degreasing agent mixed liquid is 10-20 cm higher than that of the wave-shaped beam;
Figure 945485DEST_PATH_IMAGE007
starting a stirring water pump, degreasing for 15-20 min, and removing attachments such as oil stains on the surface of the corrugated beam 1;
Figure 633955DEST_PATH_IMAGE009
degreasing the waveform by a craneThe beams 1 are lifted out of the chemical degreasing tank one by one, washed clean by strong spraying and dried or baked;
step four, passivating the corrugated beam
Figure 83391DEST_PATH_IMAGE003
Adding 3-5% of passivator into the chemical passivation tank, and keeping the water temperature at 50-55 ℃;
Figure 249930DEST_PATH_IMAGE005
the wave-shaped beam 1 after degreasing, washing, airing or drying is hung in a chemical passivation tank, and the liquid level of the mixed liquid of the tank water and the passivating agent is 10-20 cm higher than that of the wave-shaped beam;
Figure 468422DEST_PATH_IMAGE007
starting a stirring water pump, and passivating for 20-30 min;
Figure 327793DEST_PATH_IMAGE009
hoisting the passivated wave-shaped beams 1 out of the chemical passivation pool one by using a crane, and airing or drying again;
step five, dipping and spraying the plastic coating
Selecting a plastic dipping coating or a plastic spraying coating according to the needs of customers, adopting a professional plastic dipping coating device or a plastic spraying coating device to dip or spray the plastic coating, detecting the plastic dipping coating or the plastic spraying coating by a coating thickness gauge 6 to be qualified, and transporting the plastic dipping coating or the plastic spraying coating device to a construction site to install the regenerated and repaired corrugated beam 1; or 10-30 percent of self-luminous material powder of alkaline earth aluminate with 600-800 meshes and the like can be added into the plastic raw material for dipping and spraying the plastic coating, and the self-luminous material powder can continuously emit light for more than 12 hours in the dark, thereby not only improving the convenience and safety of people going out at night, but also beautifying the environment.
Step six, installation and construction
Figure 326842DEST_PATH_IMAGE003
Inspecting the quality of the final regenerated and repaired guardrail corrugated beam product for preventing collision and collisionWearing and packaging, and transporting to a construction site;
Figure 562652DEST_PATH_IMAGE005
and installing a regeneration and repair finished product of the guardrail corrugated beam on the guardrail column which is straightened and regulated and has the height meeting the requirement, wherein the installation quality meets the design requirement.
The straightening and correcting machine leaves the bending point of the bent wave-shaped beam 11
Figure 307754DEST_PATH_IMAGE032
At a certain distance
Figure 338027DEST_PATH_IMAGE033
To treat and
Figure 824372DEST_PATH_IMAGE034
is clamped by a clamp 2 and deviates from the clamp
Figure 326854DEST_PATH_IMAGE035
Connecting wire
Figure 519938DEST_PATH_IMAGE010
Bending point
Figure 721112DEST_PATH_IMAGE032
Hydraulic jack for office
Figure 632436DEST_PATH_IMAGE036
Point of bending
Figure 944469DEST_PATH_IMAGE032
Slowly jacking in the opposite direction until the initial deviation
Figure 992059DEST_PATH_IMAGE037
Connecting wire
Figure 98556DEST_PATH_IMAGE038
Ending of distance, i.e. bending the axis of the corrugated beam 11
Figure 497176DEST_PATH_IMAGE037
To recurved wave-shaped beam
Figure 612900DEST_PATH_IMAGE039
Axial line, backward bending wave-shaped beam after dismounting hydraulic jack 3
Figure 514996DEST_PATH_IMAGE039
Axis rebounding elasticity to straightening wave-shaped beam
Figure 57973DEST_PATH_IMAGE040
The axis line achieves the purpose of straightening the bent wave-shaped beam 11; a local convex point waveform beam 14 consisting of a clamp 2 and a hydraulic jack
Figure 412731DEST_PATH_IMAGE041
And a matched rigid cushion block 22 to correct local convex points
Figure 332146DEST_PATH_IMAGE042
Equal distance between two sides
Figure 88749DEST_PATH_IMAGE043
Is clamped and deviated by a clamp 2
Figure 599365DEST_PATH_IMAGE043
Connecting wire
Figure 696546DEST_PATH_IMAGE011
Local salient point
Figure 747547DEST_PATH_IMAGE042
Hydraulic jack for office
Figure 358657DEST_PATH_IMAGE041
Point of protrusion
Figure 712278DEST_PATH_IMAGE042
Slowly jacking in the opposite direction until the initial deviation
Figure 838366DEST_PATH_IMAGE044
Connecting wire
Figure 834004DEST_PATH_IMAGE017
The distance is stopped to enable the axis of the convex point wave-shaped beam 14
Figure 565200DEST_PATH_IMAGE044
To the inverted concave corrugated beam
Figure 886459DEST_PATH_IMAGE045
Axis, relief of convex point wave beam after hydraulic jack 3 is dismounted
Figure 171947DEST_PATH_IMAGE045
Axis rebounding elasticity to correct wave beam
Figure 236855DEST_PATH_IMAGE046
Axis, achieving the purpose of correcting the local convex point wave-shaped beam 14.
The bent wave-shaped beam 11 is straightened, and the bent wave-shaped beam is supposed to be a two-end fixed beam fixed on the two-end clamp 2 and leaves the bending point of the bent wave-shaped beam 11
Figure 822557DEST_PATH_IMAGE032
At a certain distance
Figure 379218DEST_PATH_IMAGE033
To treat and
Figure 683160DEST_PATH_IMAGE034
the part is clamped by a clamp 2, and the pressure of a hydraulic jack 3 acts at the bending point
Figure 958283DEST_PATH_IMAGE036
The thickness, the moment of inertia and the elastic modulus of the bent corrugated beam 11 are respectively
Figure 398492DEST_PATH_IMAGE047
Then, the stress of the bent corrugated beam 11 is calculated by the formula one:
formula I,
Figure 61555DEST_PATH_IMAGE048
Correcting the local convex point wave-shaped beam 14, assuming that the local convex point wave-shaped beam is in a spherical crown shell shape, the central diameter of the bottom surface section of the spherical crown shell is
Figure 587214DEST_PATH_IMAGE049
I.e. the bottom surface of the spherical crown shell
Figure 993924DEST_PATH_IMAGE050
The radius of curvature of the spherical crown shell of the convex-point wave-shaped beam 14 is
Figure 554219DEST_PATH_IMAGE051
And the radius of curvature of the spherical crown shell of the anti-concave wave beam 15 are both
Figure 122603DEST_PATH_IMAGE052
Bottom surface of spherical crown shell
Figure 401138DEST_PATH_IMAGE050
With respective side clamps
Figure 345960DEST_PATH_IMAGE053
At a distance of
Figure 760761DEST_PATH_IMAGE054
The rise of the spherical crown shell is
Figure 500047DEST_PATH_IMAGE011
Two-part clamp
Figure 298DEST_PATH_IMAGE053
The distance between the two beams is the width of the wave beam
Figure 748811DEST_PATH_IMAGE055
Top of spherical crown shell
Figure 752540DEST_PATH_IMAGE056
Acting liquidPressure of the pressure jack 3
Figure 928306DEST_PATH_IMAGE041
Bottom of spherical crown shell
Figure 921713DEST_PATH_IMAGE056
A rigid cushion block 22 is arranged on the mattress, the rigid cushion block is hollow, and the hollow radius is
Figure 5075DEST_PATH_IMAGE057
Radius of center of cross section of bottom surface of spherical crown shell
Figure 394468DEST_PATH_IMAGE058
Big (a)
Figure 944399DEST_PATH_IMAGE059
I.e. by
Figure 950401DEST_PATH_IMAGE060
One side of the rigid cushion block 22, which is in contact with the corrugated beam, has the same shape as the corrugated beam, and the other side is a plane and is placed on the working platform; assuming a hollow edge of the rigid pad 22
Figure 243979DEST_PATH_IMAGE061
For consolidation, the pressure of the local convex point waveform beam 14 on the hydraulic jack 3 is corrected according to the principles of elasticity mechanics, force balance and function conservation theorem
Figure 284616DEST_PATH_IMAGE041
Under the action, the section stress is calculated by a formula II:
the second formula,
Figure 802185DEST_PATH_IMAGE062
The symbols in the formula I and the formula II are defined as follows:
Figure 764325DEST_PATH_IMAGE058
-bump wave beam
Figure 392752DEST_PATH_IMAGE056
And an inverted concave corrugated beam
Figure 225579DEST_PATH_IMAGE063
The center radius of the section of the bottom surface of the spherical crown shell,
Figure 179628DEST_PATH_IMAGE064
；
Figure 97906DEST_PATH_IMAGE065
half width of the wave beam 1, i.e. two clamps
Figure 795604DEST_PATH_IMAGE043
The distance between the two electrodes is half of the distance between the two electrodes,
Figure 14095DEST_PATH_IMAGE064
；
Figure 607888DEST_PATH_IMAGE066
the bottom section edge of the spherical crown shell of the convex point wave beam 14 and the reverse concave wave beam 15
Figure 273181DEST_PATH_IMAGE067
To the clamp
Figure 243411DEST_PATH_IMAGE068
The distance of (a) to (b),
Figure 316409DEST_PATH_IMAGE064
；
Figure 18786DEST_PATH_IMAGE069
the thickness of the corrugated beam 1 is,
Figure 177235DEST_PATH_IMAGE064
；
Figure 951156DEST_PATH_IMAGE070
the hollow radius of the rigid cushion block 22 for correcting the convex point waveform beam 14 is larger than the central radius of the section of the bottom surface of the spherical crown shell
Figure 144240DEST_PATH_IMAGE058
Large size, i.e.
Figure 345414DEST_PATH_IMAGE071
The distance between the two or more of the two or more,
Figure 460001DEST_PATH_IMAGE064
；
Figure 303192DEST_PATH_IMAGE051
the radius of curvature of the spherical crown shell of the convex-point wave-shaped beam 14,
Figure 85203DEST_PATH_IMAGE064
；
Figure 457278DEST_PATH_IMAGE052
the radius of curvature of the spherical shell of the inverted-concave wave beam 15,
Figure 324740DEST_PATH_IMAGE064
；
Figure 440464DEST_PATH_IMAGE057
the hollow radius of the rigid block 22,
Figure 342561DEST_PATH_IMAGE060
，
Figure 885538DEST_PATH_IMAGE064
；
Figure 771454DEST_PATH_IMAGE072
respectively a bent wave-shaped beam
Figure 431149DEST_PATH_IMAGE032
And recurved wave shaped beam
Figure 453331DEST_PATH_IMAGE073
To the clamp
Figure 901630DEST_PATH_IMAGE033
Or holders for
Figure 9263DEST_PATH_IMAGE034
The distance between the two or more of (a) and (b),
Figure 201210DEST_PATH_IMAGE064
；
Figure 77899DEST_PATH_IMAGE010
-bent wave beam
Figure 962679DEST_PATH_IMAGE032
And recurved wave shaped beam
Figure 292029DEST_PATH_IMAGE073
To the clamp
Figure 553246DEST_PATH_IMAGE074
The distance between the connecting lines is greater than the distance between the connecting lines,
Figure 284442DEST_PATH_IMAGE064
；
Figure 340122DEST_PATH_IMAGE070
the difference between the radius of the spherical crown shell bottom section of the inverted concave wave beam 15 and the radius of the spherical crown shell bottom section of the convex wave beam 14,
Figure 156769DEST_PATH_IMAGE064
；
Figure 221677DEST_PATH_IMAGE011
-bump waveBeam
Figure 604116DEST_PATH_IMAGE075
And an inverted concave corrugated beam
Figure 33961DEST_PATH_IMAGE063
To the clamp
Figure 337903DEST_PATH_IMAGE076
The distance between the connecting lines is greater than the distance between the connecting lines,
Figure 224080DEST_PATH_IMAGE064
；
Figure 398709DEST_PATH_IMAGE077
-the modulus of elasticity of the wave beam,
Figure 61772DEST_PATH_IMAGE078
；
Figure 587431DEST_PATH_IMAGE079
the moment of inertia of the sections of the bent wave-shaped beam 11 and the reverse bent wave-shaped beam 12,
Figure 994142DEST_PATH_IMAGE080
；
Figure 288857DEST_PATH_IMAGE081
the maximum pressure value of the jack pressure required for straightening the bent corrugated beam 11 is determined by calculation or tests,
Figure 122821DEST_PATH_IMAGE082
；
Figure 135776DEST_PATH_IMAGE083
the maximum pressure value of the jack pressure required for correcting the convex point corrugated beam 14 is determined by calculation or experiments,
Figure 80598DEST_PATH_IMAGE082
；
Figure 495399DEST_PATH_IMAGE084
the poisson ratio of the material of the corrugated beam 1 is dimensionless;
Figure 500264DEST_PATH_IMAGE085
convex point wave beam 14 spherical crown shell bottom arc length
Figure 516DEST_PATH_IMAGE086
Half of the corresponding central angle of the circle,
Figure 749029DEST_PATH_IMAGE087
；
Figure 18336DEST_PATH_IMAGE088
arc length of bottom surface of spherical crown shell of inverted concave wave beam 15
Figure 194103DEST_PATH_IMAGE089
Half of the corresponding central angle of the circle,
Figure 978388DEST_PATH_IMAGE087
；
Figure 270872DEST_PATH_IMAGE090
respectively of a reverse-curved wave-shaped beam
Figure 660265DEST_PATH_IMAGE091
Pressure of jack
Figure 475774DEST_PATH_IMAGE036
The bending moment under the action of the bending moment,
Figure 950618DEST_PATH_IMAGE092
；
Figure 40934DEST_PATH_IMAGE093
-the center of the section of the bottom surface of the spherical crown shell is respectively an inverted concave wave beam 15
Figure 956937DEST_PATH_IMAGE094
To be provided with
Figure 474506DEST_PATH_IMAGE095
Is unit arc length section tension, shearing force and bending moment of radius,
Figure 171067DEST_PATH_IMAGE096
；
Figure 533915DEST_PATH_IMAGE097
allowable tensile force, allowable shearing force and allowable bending moment of the section of the inverse bending wave shaped beam 12,
Figure 163480DEST_PATH_IMAGE098
；
Figure 586371DEST_PATH_IMAGE099
-the center of the section of the bottom surface of the spherical crown shell is respectively an inverted concave wave beam 15
Figure 770227DEST_PATH_IMAGE094
To be provided with
Figure 202346DEST_PATH_IMAGE095
Is the allowable tensile force, the allowable shearing force and the allowable bending moment of a unit arc length section of the radius,
Figure 420837DEST_PATH_IMAGE096
。
meanwhile, the bent corrugated beam 11 and the convex point corrugated beam 14 are straightened by the straightening and straightening machine, the hydraulic jack 3 needs to be slowly loaded step by step when applying pressure, sudden or impact application is avoided, the stroke of the hydraulic jack 3 is automatically measured, and the total stroke is not suitable to exceed
Figure 280209DEST_PATH_IMAGE016
Or
Figure 951362DEST_PATH_IMAGE017
After the hydraulic jack 3 is detached, the rebound quantity of the straightened bent corrugated beam 11 and the corrected convex point corrugated beam 14 is detected to meet the requirement and meet the standard specified by the specification.
A rigid base plate 21 with the same width as the bent corrugated beam 11 needs to be arranged at the contact position of the hydraulic jack 3 and the bent corrugated beam 11 so as to straighten the whole section of the bent corrugated beam 11; the shape of one side of the rigid backing plate 21, which is contacted with the wave-shaped beam, needs to be the same as that of the wave-shaped beam, the other side of the rigid backing plate 21 is a plane, and the jack acts on the central point of the rigid backing plate 21; the convex point waveform beam 14 is corrected, the contact part of the jack and the convex point waveform beam is required to be padded with a rigid cushion block 22, and the convex height of the convex point is detected in advance
Figure 718329DEST_PATH_IMAGE100
And the central radius of the section of the bottom surface of the spherical crown shell
Figure 785468DEST_PATH_IMAGE101
To select the appropriate size and shape of the rigid spacer 22; the rigid cushion block is hollow, and the hollow radius is larger than the central radius of the section of the bottom surface of the spherical crown shell
Figure 815741DEST_PATH_IMAGE101
Big (a)
Figure 974190DEST_PATH_IMAGE102
The shape of one side of the rigid cushion block 22, which is in contact with the corrugated beam 1, needs to be the same as that of the corrugated beam, the other side of the rigid cushion block is a plane, one side of the plane is placed on a working platform, and the jack acts on the central point of the salient point corrugated beam 14.
The clamps 2 are a pair of tools for clamping the corrugated beam 11 to be straightened and bent and the convex point corrugated beam 14 to be corrected, the middle part of each clamp is provided with a loading jack, and the distance between the two clamps 2 is the straightening and bending corrugated beam
Figure 748111DEST_PATH_IMAGE103
Convex point waveform correcting beam
Figure 675616DEST_PATH_IMAGE104
(ii) a The jack is driven by hydraulic pressure, and is calibrated to be qualified before use; the two clamps 2 and the jack need to be provided with a firm and stable supporting mechanism, and the supporting mechanism cannot deform or move when the bent corrugated beam 11 is straightened and the convex point corrugated beam 14 is straightened.
The invention is a repairing method which carries out regeneration repairing on a bent wave-shaped beam 11 and a salient point wave-shaped beam 14 sequentially by instruments such as a mechanical straightening and correcting tank, a chemical degreasing and passivating tank 4, a plastic coating soaking and spraying device 5, a coating thickness gauge 6 and the like to meet the specified standard, and then installs the beams on the road side and the upright posts at the central separation zone for use again, so the repairing method has the use advantages of convenient operation, low cost, safety, reliability, high resource utilization rate and the like, can effectively improve the repairing and regenerating effects of the guardrail wave-shaped beam, and has higher economic benefit and social benefit.
The above description is only a specific embodiment of the present invention, and those skilled in the art should understand that any similar structural design to the embodiment is included in the protection scope of the present invention.

Claims (6)

1. A regeneration repairing method for a guardrail corrugated beam is characterized by comprising the following steps:
step one, visual inspection, detection and evaluation of old corrugated beams
Figure DEST_PATH_IMAGE001
Through visual inspection and simple measurement, the old corrugated beam is classified, namely, the waste is recycled and repaired and regenerated:
the first type: the corrugated beam (1) has serious damage such as distortion, breakage and serious fracture, so that the corrugated beam can not be used again generally and can be treated by a furnace returning method or other methods;
the second type: the corrugated beam (1) is generally repaired and recycled by welding if slight fracture exists;
in the third category: slightly bending the corrugated beam (11) and locally sinking and deforming the corrugated beam (14), namely repairing and regenerating the corrugated beam (11) and then reusing the corrugated beam (14);
Figure 950787DEST_PATH_IMAGE002
the second and third type wave beams (1) are detected in detail and evaluated according to relevant standard regulations, so that the wave beams can be repaired and recycled;
step two, straightening and correcting the corrugated beam through straightening and correcting machinery
Figure 742026DEST_PATH_IMAGE001
The straightening and correcting machine consists of a clamp (2), a hydraulic jack (3), a matched rigid base plate (21) and a rigid cushion block (22), wherein the clamp (2), the hydraulic jack (3), the matched rigid base plate (21) and the rigid cushion block (22) are used for straightening and correcting the bent waveform beam (11) and the convex point waveform beam (14) which is locally convex, the hydraulic jack (3) is used for applying straightening and correcting pressure according to detection data, the strength of the waveform beam under the action of the straightening and correcting pressure is met, and the bent waveform beam (11) and the convex point waveform beam (14) need to meet the straightening and correcting strength requirement of the straightening and correcting machine;
Figure 211053DEST_PATH_IMAGE002
selecting the type and specification of the hydraulic jack (3) and manufacturing a plurality of rigid base plates (21) and a plurality of rigid cushion blocks (22) according to the detection data;
Figure DEST_PATH_IMAGE003
determining the control and detection requirements of mechanical straightening and correcting operation according to the detection data of the bent wave-shaped beam (11) and the convex point wave-shaped beam (14);
Figure 833664DEST_PATH_IMAGE004
two clamps (2) are provided with clamping bending wave-shaped beams (11) or salient point wave-shaped beams (14), and the bending points of the bending wave-shaped beams (11) are measured
Figure DEST_PATH_IMAGE005
And the distance between the bending point and the two clamps (2) or the measurement of the salient point wave-shaped beam (14)
Figure 464366DEST_PATH_IMAGE006
And the distance between the salient point and the two clamps (2);
Figure DEST_PATH_IMAGE007
an automatic distance detector is arranged for automatically detecting and recording the pressurizing stroke of the hydraulic jack (3);
Figure 805217DEST_PATH_IMAGE008
selecting a rigid base plate (21) with the same width as the bent corrugated beam (11) or a rigid base plate (21) and a rigid cushion block (22) which are matched with the sizes of the salient points of the salient point corrugated beam (14), installing and adjusting the position of a hydraulic jack (3), preliminarily jacking the bent part of the bent corrugated beam (11) or the salient points of the salient point corrugated beam (14), starting the hydraulic jack (3), and automatically detecting and recording the initial value of the pressurizing stroke of the hydraulic jack (3);
the hydraulic jack (3) slowly continues to jack until the jacking stroke of the hydraulic jack reaches
Figure 750040DEST_PATH_IMAGE009
Or
Figure 164840DEST_PATH_IMAGE010
Holding the lotus for 1-2 min;
Figure DEST_PATH_IMAGE011
the oil cylinder of the hydraulic jack (3) returns oil slowly, and when the jacking stroke of the hydraulic jack is recovered
Figure 232022DEST_PATH_IMAGE005
Or
Figure 732274DEST_PATH_IMAGE006
Stopping oil return and holding the load for 1-2 min;
Figure 480787DEST_PATH_IMAGE012
the oil cylinder of the hydraulic jack (3) continues to return oil slowly, and the jacking stroke of the hydraulic jack returns to the initial value;
Figure DEST_PATH_IMAGE013
the hydraulic jack (3) is dismounted, the straightening or correcting effect at the bending part of the bent corrugated beam (11) or the convex point of the convex point corrugated beam (14) is detected, and the straightening or correcting effect is required to meet the standard requirement;
if the straightening or straightening of the corrugated beam (1) does not meet the standard requirement, the processing method comprises the following steps: the straightening or correcting effect is not achieved
Figure 83850DEST_PATH_IMAGE014
Or
Figure 728458DEST_PATH_IMAGE015
The bent wave-shaped beam (11) or the salient point wave-shaped beam (14) is detached and kept flat for 30 to 50min without straightening or correcting, and the detection is carried out again
Figure 981585DEST_PATH_IMAGE014
Or
Figure 268209DEST_PATH_IMAGE015
Setting the top pressure of the hydraulic jack (3)Program for programming
Figure 657602DEST_PATH_IMAGE016
Or
Figure DEST_PATH_IMAGE017
Value, again according to step two
Figure 66587DEST_PATH_IMAGE007
～
Figure 541431DEST_PATH_IMAGE013
Straightening or correcting the wave-shaped beam (1); removing the bent corrugated beam (11) or the salient point corrugated beam (14) beyond the straightening or correcting effect, laying flat and standing for 30-50 min, and detecting again
Figure 569430DEST_PATH_IMAGE014
Or
Figure 610067DEST_PATH_IMAGE015
Reversely installing and clamping a bent wave-shaped beam (11) or a salient point wave-shaped beam (14) and setting the jacking stroke of the hydraulic jack (3)
Figure 330898DEST_PATH_IMAGE018
Or
Figure DEST_PATH_IMAGE019
Value, again according to step two
Figure 355355DEST_PATH_IMAGE007
～
Figure 983782DEST_PATH_IMAGE013
Straightening or correcting the corrugated beam (1);
step three, chemical degreasing of the corrugated beam
Figure 82188DEST_PATH_IMAGE001
A stirring water pump is arranged in the chemical degreasing tank, 5-7% of degreasing agent is added into the chemical degreasing tank, and the water temperature is 40-50 ℃;
Figure 788237DEST_PATH_IMAGE002
placing the wave-shaped beam (1) qualified through straightening or correction detection into a chemical degreasing pool, wherein the liquid level of the pool water and degreasing agent mixed liquid is 10-20 cm higher than that of the wave-shaped beam;
Figure 237673DEST_PATH_IMAGE003
starting a stirring water pump, degreasing for 15-20 min, and removing oil stain attachments on the surface of the corrugated beam (1);
Figure 404212DEST_PATH_IMAGE004
hoisting the degreased corrugated beams (1) out of the chemical degreasing tank one by using a crane, washing the degreased corrugated beams by using strong spraying, and airing or drying the degreased corrugated beams;
step four, passivating the corrugated beam
Figure 622703DEST_PATH_IMAGE001
Adding 3-5% of passivator into the chemical passivation tank, and keeping the water temperature at 50-55 ℃;
Figure 482075DEST_PATH_IMAGE002
the wave-shaped beam (1) which is degreased, washed, dried or dried is hung in a chemical passivation tank, and the liquid level of the mixed liquid of the tank water and the passivating agent is 10-20 cm higher than the wave-shaped beam;
Figure 418807DEST_PATH_IMAGE003
starting a stirring water pump, and passivating for 20-30 min;
Figure 389037DEST_PATH_IMAGE004
hoisting the passivated wave-shaped beams (1) out of the chemical passivation pool one by using a crane, and airing or drying again;
step five, dipping and spraying the plastic coating
Selecting a plastic dipping coating or a plastic spraying coating according to the needs of customers, adopting a professional plastic dipping coating device or a plastic spraying coating device to dip the plastic coating or the plastic spraying coating, detecting the coating by a coating thickness gauge (6) to be qualified, and transporting the coating to a construction site to install the regenerated and repaired corrugated beam (1); or 10-30 percent of alkaline earth aluminate self-luminous material powder with 600-800 meshes can be added into the plastic raw material for dipping and spraying the plastic coating;
step six, installation and construction
Figure 727615DEST_PATH_IMAGE001
Inspecting the quality of the regenerated and repaired finished product of the waveform beam of the guardrail, packaging the product in an anti-collision and anti-abrasion manner, and transporting the product to a construction site;
Figure 757887DEST_PATH_IMAGE002
and installing a regeneration and repair finished product of the guardrail corrugated beam on the guardrail column which is straightened and regulated and has the height meeting the requirement, wherein the installation quality meets the design requirement.
2. A method for regenerating and repairing a corrugated guardrail beam as claimed in claim 1, wherein the straightening and straightening machine is away from the bending point of the bent corrugated guardrail beam (11)
Figure 916336DEST_PATH_IMAGE020
At a certain distance
Figure DEST_PATH_IMAGE021
To treat and
Figure 283733DEST_PATH_IMAGE022
is clamped by a clamp (2) and deviates from the clamp
Figure 476817DEST_PATH_IMAGE023
Connecting wire
Figure 677991DEST_PATH_IMAGE005
Bending point
Figure 120473DEST_PATH_IMAGE020
Hydraulic jack for office
Figure 641628DEST_PATH_IMAGE024
Point of bending
Figure 689218DEST_PATH_IMAGE020
Slowly jacking in the opposite direction until the initial deviation
Figure 61294DEST_PATH_IMAGE025
Connecting wire
Figure 194335DEST_PATH_IMAGE026
At the end of the distance, i.e. bending the axis of the corrugated beam (11)
Figure 310058DEST_PATH_IMAGE025
To recurved wave-shaped beam
Figure 212155DEST_PATH_IMAGE027
Axial line, backward bending wave-shaped beam after removing hydraulic jack (3)
Figure 755132DEST_PATH_IMAGE027
The axis rebounds the elasticity to the straightening wave-shaped beam (13)
Figure 109890DEST_PATH_IMAGE028
An axis; a local convex point wave-shaped beam (14) consisting of a clamp (2) and a hydraulic jack
Figure 29305DEST_PATH_IMAGE029
And a straightening machine consisting of a matched rigid cushion block (22) for straightening, wherein the local convex point is formed
Figure 785908DEST_PATH_IMAGE030
Equal distance between two sides
Figure 499786DEST_PATH_IMAGE031
Is clamped by a clamp (2) and deviates
Figure 607419DEST_PATH_IMAGE031
Connecting wire
Figure 64945DEST_PATH_IMAGE006
Local salient point
Figure 676055DEST_PATH_IMAGE030
Hydraulic jack for office
Figure 826414DEST_PATH_IMAGE029
Point of protrusion
Figure 155764DEST_PATH_IMAGE030
Slowly jacking in the opposite direction until the initial deviation
Figure 145543DEST_PATH_IMAGE032
Connecting wire
Figure 876738DEST_PATH_IMAGE010
The distance is terminated so that the axes of the convex point wave-shaped beams (14)
Figure 994736DEST_PATH_IMAGE032
To the inverted concave corrugated beam
Figure 545803DEST_PATH_IMAGE033
Axial, relieving hydraulic jacks(3) Rear convex point wave beam
Figure 610711DEST_PATH_IMAGE033
The axis rebounds the elasticity to the correction wave beam (16)
Figure 196413DEST_PATH_IMAGE034
An axis.
3. A regeneration and repair method for waveform beam of guardrail as claimed in claim 2, wherein the bending waveform beam (11) is straightened, assuming that the bending waveform beam is a two-end fixing beam fixed on the two-end clamp (2), and departs from the bending point of the bending waveform beam (11)
Figure 422995DEST_PATH_IMAGE020
At a certain distance
Figure 726937DEST_PATH_IMAGE021
To treat and
Figure 329957DEST_PATH_IMAGE022
the part is clamped by a clamp (2), and the pressure of a hydraulic jack (3) acts on the bending point
Figure 770166DEST_PATH_IMAGE024
The thickness, the moment of inertia and the elastic modulus of the bent corrugated beam (11) are respectively
Figure 167649DEST_PATH_IMAGE035
And then, the stress of the bending wave-shaped beam (11) is calculated by a formula I:
formula I,
Figure 958887DEST_PATH_IMAGE036
Correcting the local convex point wave-shaped beam (14), and assuming that the local convex point wave-shaped beam is in a spherical crown shell shape, the bottom surface of the spherical crown shellCross-sectional center diameter of
Figure 365598DEST_PATH_IMAGE037
I.e. the bottom surface of the spherical crown shell
Figure 925892DEST_PATH_IMAGE038
The radius of curvature of the spherical crown shell of the convex point wave-shaped beam (14) is
Figure 494277DEST_PATH_IMAGE039
And the spherical crown shell curvature radius of the anti-concave wave beam (15) are all
Figure 772811DEST_PATH_IMAGE040
Bottom surface of spherical crown shell
Figure 723493DEST_PATH_IMAGE038
With respective side clamps
Figure 341556DEST_PATH_IMAGE041
At a distance of
Figure 877580DEST_PATH_IMAGE042
The rise of the spherical crown shell is
Figure 581094DEST_PATH_IMAGE006
Two-part clamp
Figure 329607DEST_PATH_IMAGE041
The distance between the two beams is the width of the wave beam
Figure 598914DEST_PATH_IMAGE043
Top of spherical crown shell
Figure 571418DEST_PATH_IMAGE044
Acting on the pressure of the hydraulic jack (3)
Figure 558966DEST_PATH_IMAGE029
Bottom of spherical crown shell
Figure 845591DEST_PATH_IMAGE044
A rigid cushion block (22) is arranged on the pad, the rigid cushion block is hollow, and the hollow radius is
Figure 438246DEST_PATH_IMAGE045
Radius of center of cross section of bottom surface of spherical crown shell
Figure 50493DEST_PATH_IMAGE046
Big (a)
Figure 259757DEST_PATH_IMAGE047
I.e. by
Figure 350073DEST_PATH_IMAGE048
One side of the rigid cushion block (22) in contact with the corrugated beam is the same as the corrugated beam in shape, and the other side of the rigid cushion block is a plane and is placed on the working platform; assuming a hollow edge of the rigid pad (22)
Figure 593973DEST_PATH_IMAGE049
For consolidation, the pressure of the local convex point wave-shaped beam (14) on the hydraulic jack (3) is corrected according to the principles of elasticity mechanics, force balance and function conservation theorem
Figure 111542DEST_PATH_IMAGE029
Under the action, the section stress is calculated by a formula II:
the second formula,
Figure 73681DEST_PATH_IMAGE050
The symbols in the formula I and the formula II are defined as follows:
Figure 719687DEST_PATH_IMAGE046
-bump wave beam
Figure 818093DEST_PATH_IMAGE044
And an inverted concave corrugated beam
Figure 506563DEST_PATH_IMAGE051
The center radius of the section of the bottom surface of the spherical crown shell,
Figure 690420DEST_PATH_IMAGE052
；
Figure 122538DEST_PATH_IMAGE053
half the width of the wave beam (1), i.e. two clamps
Figure 341030DEST_PATH_IMAGE041
The distance between the two electrodes is half of the distance between the two electrodes,
Figure 200402DEST_PATH_IMAGE052
；
Figure 871554DEST_PATH_IMAGE054
-the bottom section edge of the spherical crown shell of the convex point wave beam (14) and the reverse concave wave beam (15)
Figure 841784DEST_PATH_IMAGE055
To the clamp
Figure 914783DEST_PATH_IMAGE056
The distance of (a) to (b),
Figure 272952DEST_PATH_IMAGE052
；
Figure 103504DEST_PATH_IMAGE057
-wave shaped beam (1)The thickness of (a) to (b),
Figure 877425DEST_PATH_IMAGE052
；
Figure 70509DEST_PATH_IMAGE058
the hollow radius of the rigid cushion block (22) for correcting the convex point wave-shaped beam (14) is larger than the central radius of the section of the bottom surface of the spherical crown shell
Figure 271684DEST_PATH_IMAGE046
Large size, i.e.
Figure 651849DEST_PATH_IMAGE059
The distance between the two or more of the two or more,
Figure 235321DEST_PATH_IMAGE052
；
Figure 282911DEST_PATH_IMAGE039
-radius of curvature of spherical crown shell of convex point wave shaped beam (14),
Figure 982883DEST_PATH_IMAGE052
；
Figure 850344DEST_PATH_IMAGE040
-radius of curvature of spherical shell of anti-concave wave beam (15),
Figure 966068DEST_PATH_IMAGE052
；
Figure 868165DEST_PATH_IMAGE045
-the hollow radius of the rigid pad (22),
Figure 411142DEST_PATH_IMAGE048
，
Figure 31479DEST_PATH_IMAGE052
；
Figure 685314DEST_PATH_IMAGE060
respectively a bent wave-shaped beam
Figure 707497DEST_PATH_IMAGE020
And recurved wave shaped beam
Figure 421375DEST_PATH_IMAGE061
To the clamp
Figure 935533DEST_PATH_IMAGE021
Or holders for
Figure 393059DEST_PATH_IMAGE022
The distance between the two or more of (a) and (b),
Figure 863223DEST_PATH_IMAGE052
；
Figure 748003DEST_PATH_IMAGE005
-bent wave beam
Figure 71494DEST_PATH_IMAGE020
And recurved wave shaped beam
Figure 332711DEST_PATH_IMAGE061
To the clamp
Figure 63906DEST_PATH_IMAGE062
The distance between the connecting lines is greater than the distance between the connecting lines,
Figure 119587DEST_PATH_IMAGE052
；
Figure 936233DEST_PATH_IMAGE058
the difference between the radius of the spherical crown shell bottom section of the anti-concave wave beam (15) and the radius of the spherical crown shell bottom section of the convex wave beam (14),
Figure 1141DEST_PATH_IMAGE052
；
Figure 790106DEST_PATH_IMAGE006
-bump wave beam
Figure DEST_PATH_IMAGE063
And an inverted concave corrugated beam
Figure 79005DEST_PATH_IMAGE051
To the clamp
Figure 382947DEST_PATH_IMAGE064
The distance between the connecting lines is greater than the distance between the connecting lines,
Figure 985967DEST_PATH_IMAGE052
；
Figure 426175DEST_PATH_IMAGE065
-the modulus of elasticity of the wave beam,
Figure 89238DEST_PATH_IMAGE066
；
Figure 880476DEST_PATH_IMAGE067
the inertia moment of the sections of the bending wave-shaped beam (11) and the reverse bending wave-shaped beam (12),
Figure 287187DEST_PATH_IMAGE068
；
Figure 581902DEST_PATH_IMAGE069
the maximum pressure value of the jack pressure required by straightening the bent wave-shaped beam (11) is determined by calculation or tests,
Figure 421725DEST_PATH_IMAGE070
；
Figure 434681DEST_PATH_IMAGE071
the maximum pressure value of the jack pressure required for correcting the convex point wave-shaped beam (14) is determined by calculation or experiments,
Figure 379503DEST_PATH_IMAGE070
；
Figure 794304DEST_PATH_IMAGE072
-poisson's ratio of the material of the corrugated beam (1), dimensionless;
Figure 799169DEST_PATH_IMAGE073
convex point wave beam (14) spherical crown shell bottom arc length
Figure 299420DEST_PATH_IMAGE074
Half of the corresponding central angle of the circle,
Figure 47933DEST_PATH_IMAGE075
；
Figure 317241DEST_PATH_IMAGE076
arc length of bottom surface of spherical crown shell of anti-concave wave beam (15)
Figure 493007DEST_PATH_IMAGE077
Half of the corresponding central angle of the circle,
Figure 480555DEST_PATH_IMAGE075
；
Figure 767179DEST_PATH_IMAGE078
respectively of a reverse-curved wave-shaped beam
Figure 156573DEST_PATH_IMAGE079
Pressure of jack
Figure 972082DEST_PATH_IMAGE024
The bending moment under the action of the bending moment,
Figure 712505DEST_PATH_IMAGE080
；
Figure 802820DEST_PATH_IMAGE081
-each is a section center of the bottom surface of the spherical crown shell of the anti-concave wave beam (15)
Figure 46720DEST_PATH_IMAGE082
To be provided with
Figure 581867DEST_PATH_IMAGE083
Is unit arc length section tension, shearing force and bending moment of radius,
Figure 278428DEST_PATH_IMAGE084
；
Figure 906855DEST_PATH_IMAGE085
-allowable tensile force, allowable shearing force and allowable bending moment of the section of the inverse bending wave shaped beam (12) respectively,
Figure 270840DEST_PATH_IMAGE086
；
Figure 959311DEST_PATH_IMAGE087
-each is a section center of the bottom surface of the spherical crown shell of the anti-concave wave beam (15)
Figure 143167DEST_PATH_IMAGE082
To be provided with
Figure 575286DEST_PATH_IMAGE083
Is the allowable tensile force, the allowable shearing force and the allowable bending moment of a unit arc length section of the radius,
Figure 793777DEST_PATH_IMAGE084
。
4. the regeneration and repair method for waveform beams of guardrails according to claim 3, characterized in that the straightening and straightening machines straighten and bend the waveform beams (11) and straighten the bump waveform beams (14), when the hydraulic jacks (3) apply pressure, the hydraulic jacks (3) need to be slowly loaded step by step, sudden or impact application is avoided, the stroke of the hydraulic jacks (3) is automatically measured, and the total stroke is not suitable to exceed the total stroke
Figure 653149DEST_PATH_IMAGE009
Or
Figure 324302DEST_PATH_IMAGE010
After the hydraulic jack (3) is detached, the rebound quantity of the straightened bent wave-shaped beam (11) and the corrected convex point wave-shaped beam (14) is detected to meet the requirement and meet the standard specified by the specification.
5. The regeneration and repair method for waveform beam of guardrail as claimed in claim 3, wherein the straightening and bending waveform beam (11) is provided with a cushion at the contact position of the hydraulic jack (3) and the bending waveform beam (11)Bending the rigid backing plates (21) with the same width of the wave-shaped beam (11) to straighten the whole section of the bent wave-shaped beam (11); the shape of one side of the rigid backing plate (21) contacted with the wave-shaped beam needs to be the same as that of the wave-shaped beam, the other side of the rigid backing plate is a plane, and the jack acts on the central point of the rigid backing plate (21); the convex point waveform beam (14) is corrected, a rigid cushion block (22) is required to be arranged at the contact position of the jack and the convex point waveform beam, and the convex height of the convex point is detected in advance
Figure 28953DEST_PATH_IMAGE088
And the central radius of the section of the bottom surface of the spherical crown shell
Figure 101951DEST_PATH_IMAGE089
To select the proper size and shape of the rigid pad (22); the rigid cushion block (22) is hollow, and the hollow radius is larger than the central radius of the section of the bottom surface of the spherical crown shell
Figure 132224DEST_PATH_IMAGE089
Big (a)
Figure 556252DEST_PATH_IMAGE090
The shape of one side of the rigid cushion block (22) contacted with the wave-shaped beam needs to be the same as that of the wave-shaped beam, the other side of the rigid cushion block is a plane, one side of the plane is placed on the working platform, and the jack acts on the central point of the salient point wave-shaped beam (14).
6. The regeneration and repair method for the waveform beam of the guardrail according to claim 3, characterized in that the clamps (2) are tools for clamping the waveform beam (11) to be straightened and bent and the waveform beam (14) with the convex points, the clamps are a pair, the middle part is provided with the loading hydraulic jack (3), and the distance between the two clamps (2) is respectively the straightening and bending waveform beam
Figure 330173DEST_PATH_IMAGE091
Convex point waveform correcting beam
Figure 257677DEST_PATH_IMAGE092
(ii) a The jack is driven by hydraulic pressure; the two clamps (2) and the hydraulic jack (3) need to be provided with firm and stable supporting mechanisms, and the supporting mechanisms cannot deform or move when the corrugated beam (11) is straightened and bent and the convex point corrugated beam (14) is corrected.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102470498A (en) * 2009-12-28 2012-05-23 三菱重工业株式会社 Deflection correction device for ram
CN104550325A (en) * 2015-01-07 2015-04-29 宁波亚洲浆纸业有限公司 Correcting device and correcting method thereof
CN209156779U (en) * 2018-12-07 2019-07-26 中冶建工集团有限公司 A kind of apparatus for correcting of welding combination T-steel column

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102470498A (en) * 2009-12-28 2012-05-23 三菱重工业株式会社 Deflection correction device for ram
CN104550325A (en) * 2015-01-07 2015-04-29 宁波亚洲浆纸业有限公司 Correcting device and correcting method thereof
CN209156779U (en) * 2018-12-07 2019-07-26 中冶建工集团有限公司 A kind of apparatus for correcting of welding combination T-steel column

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