CN109930480A - Dark anchor beam type comb-tooth bridge expansion device - Google Patents
Dark anchor beam type comb-tooth bridge expansion device Download PDFInfo
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- CN109930480A CN109930480A CN201910317844.1A CN201910317844A CN109930480A CN 109930480 A CN109930480 A CN 109930480A CN 201910317844 A CN201910317844 A CN 201910317844A CN 109930480 A CN109930480 A CN 109930480A
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- 244000126211 Hericium coralloides Species 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 239000003351 stiffener Substances 0.000 claims abstract description 27
- 230000002687 intercalation Effects 0.000 claims abstract description 5
- 238000009830 intercalation Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 5
- 239000006185 dispersion Substances 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 230000009466 transformation Effects 0.000 abstract description 3
- 238000004873 anchoring Methods 0.000 description 4
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 2
- 229910000576 Laminated steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Abstract
The present invention relates to a kind of dark anchor beam type comb-tooth bridge expansion devices, including two pieces of fishbacks being respectively arranged on the bridge member of expansion joint two sides, the comb teeth of two fishbacks interlocks intercalation, each comb teeth bottom is connected with vertical ribbed stiffener and is configured to beam type structure, the beam type structure is secretly anchored on the bridge member of respective side by anchor tie plate, and the anchor tie plate is connected with respective side fishback fixing end and corresponding vertical ribbed stiffener respectively and connects with steel bar welding inside the bridge member of respective side.The present invention is by being arranged vertical ribbed stiffener in fishback bottom and group is combined into beam type structure, so that comb-type telescoping device is " beam type " structural system by conventional " board-like " Program for structural Transformation, the cross sectional moment of inertia and section rigidity that telescopic device can effectively be increased, improve the service life of telescopic device.
Description
Technical field
The invention belongs to bridge technology fields, and in particular to a kind of dark anchor beam type comb-tooth bridge expansion device.
Background technique
Telescopic device is the key position in bridge member, is played an important role in realizing bridge function.Common bridge
Telescopic device has modulus bridge expansion device and two kinds of comb-tooth-type bridge extension joint.
The board-like telescopic device of comb teeth has steel comb template and steel plate folded type, and the damage -form of appearance mainly has:
1. anchoring piece disease；
2. fishback disease；
3. rotation control seat, shaft disease；
4. water proof rubber bar inner product expires dust, rubbish, leak.
From the point of view of the part steel telescopic device situation of current destroyed, Slope protection has design reasons, processing technology to ask
Topic, construction quality problem and management and maintenance problem etc..Such telescopic device is easy to produce deformation in the process of processing and using, difficult
To guarantee tooth plate and backing plate fitting, once gap is generated, it is unfavorable to connection system and connecting portion stress, and cause noise, jump
Vehicle；In addition the volume of traffic is big, load impact frequently, easily cause premature fatigue, fastening bolt loosens, fishback rotation tilt it is outer
Dew, sundries are easy the problems such as blocking fishback gap, and it is not perfect etc. to influence Telescopic, drain function.
From comb teeth board-like telescopic device loading characteristic analysis, the reason of causing comb teeth board-like telescopic device disease mainly have with
Lower several points:
(1) telescopic device is not able to satisfy lateral deflection requirement；Meanwhile when lateral rotation occurs for beam body, between fishback
Interact stress, forms biggish shearing force to fixing bolt, bolt is easily broken off.
(2) device is not able to satisfy vertical deflection requirement
Vertical rotating is primarily referred to as displacement performance of the bridge extension joint under load action, and telescopic device is without vertical rotating
Device is only fixed on the floorings of beam-ends with rivet by function, and when device bearing load, when vertical deflection occurs, device is logical
Cross rivet and larger pulling capacity formed to beam body, when often result in nut and loosen or fall off；When frequent impact load action is on device
When, device bending deformation can be can lead to again when overstating, comb teeth fractures.
(3) across the seam comb-type telescoping device of tradition is relatively poor to the adaptability of longitudinal slope
From the point of view of the deformation analysis of beam, when bridge longitudinal slope is flat slope, the conformability of the board-like telescopic device of comb teeth is can
With, but when it is vertical disconnected have the gradient when, toothed plate type telescopic device is poor to the variation adaptability of the gradient.
Specific mechanics principle referring to Fig. 1, from the figure can be seen that when it is vertical it is disconnected have the gradient and beam is when flexible, toothed plate type is stretched
The steel plate of compression apparatus can not deacclimatize automatically the variation of the gradient and become broken line.Assume that telescopic device two sides girder becomes as shown
Before position, the schematic diagram that beam-ends gap is 100cm, longitudinal slope 3%, AB two o'clock height difference are 3cm, but when beam-ends gap is because of temperature change
When shortening to 50cm, AB two o'clock height difference is still 3cm, then the gradient is just increased to 6% by 3%；But comb tooth plate on girder
The gradient is still 3%, and beam-ends deformed in this way will give steel-tooth plate one very big upper top power, under the action of this power, comb teeth
Plate will tilt, and steel plate will deform, and bolt is easy to loosen under Impact Load.
Summary of the invention
The present embodiments relate to a kind of dark anchor beam type comb-tooth bridge expansion devices, can at least solve the prior art
Segmental defect.
The present embodiments relate to a kind of dark anchor beam type comb-tooth bridge expansion devices, including are respectively arranged on expansion joint
Two pieces of fishbacks on the bridge member of two sides, the comb teeth of two fishbacks interlock intercalation, and each comb teeth bottom is connected with vertically
Ribbed stiffener and it is configured to beam type structure, the beam type structure is secretly anchored on the bridge of respective side by anchor tie plate
On component, the anchor tie plate be connected respectively with respective side fishback fixing end and corresponding vertical ribbed stiffener and with respective side
Steel bar welding connects inside bridge member.
As one of embodiment, the bridge member of every side is equipped with horizontal stress and disperses steel plate, the horizontal stress dispersion
Steel plate includes the tilting section for having angle with horizontal plane, and each vertical ribbed stiffener is separately fixed at the tilting section of respective side
On.
As one of embodiment, the horizontal stress dispersion steel plate further includes the level for being connected to the tilting section top
Section, the horizontal segment are welded with the corresponding fishback.
As one of embodiment, each vertical ribbed stiffener form is I type or T-type form.
As one of embodiment, reinforcing bar includes the pre- gantry type steel being embedded in the bridge member inside the bridge member
Muscle.
As one of embodiment, which further includes being connected to two bridges
Water sealing structure on component, the water sealing structure are located at below the beam type structure.
The embodiment of the present invention at least has the following beneficial effects:
Dark anchor beam type comb-tooth bridge expansion device provided by the invention, by vertically adding in the setting of fishback bottom
Strength rib and group are combined into beam type structure, tie comb-type telescoping device by conventional " board-like " Program for structural Transformation " beam type "
Structure system can effectively increase the cross sectional moment of inertia and section rigidity of telescopic device, improve the service life of telescopic device.Using
The drawing of beam type structure anchor is fixed on bridge member, using beam type structure integrally as structure stress system, is not only increased
The anchoring property of fishback is added, while no longer having been connected using traditional bolt, it is easy to avoid traditional anchor bolt structure type
The drawbacks of disengaging.
The embodiment of the present invention further has the following beneficial effects:
Dark anchor beam type comb-tooth bridge expansion device provided by the invention, fishback are symmetrically laid in bridge structure seam
Two sides.Since telescopic device tooth plate is with structural joint center displacement of the lines or rotation, bridge longitudinal slope either beam body is flexible to be led
Cause vertical height difference on structure without influence, fishback structure not will receive by caused by longitudinal height difference to the upper top power of panel.
The embodiment of the present invention further has the following beneficial effects:
Disperse steel plate by using horizontal stress, for beam type structure in overall coordination stress, wheel impacts load can
It is transferred in bridge member, increases between beam type structure and the concrete structure of bridge member through horizontal stress dispersion steel plate
Contact area, load is dispersed in bridge concrete structure, bridge concrete local pressure is avoided, can preferably be protected
Expansion joint installing zone concrete；In particular, the structure based on horizontal stress dispersion steel plate setting tilting section, by the wheel of receiving
Impact load is decomposed into horizontal stress and vertical stress, and bridge member is made integrally to bear wheel impacts.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the beam-ends longitudinal direction height difference schematic diagram that background technique provides；
Fig. 2 is that the cross-sectional structure of dark anchor beam type comb-tooth bridge expansion device provided in an embodiment of the present invention is illustrated
Figure；
Fig. 3 and Fig. 4 is the schematic view of facade structure of the beam type structure of two kinds of forms provided in an embodiment of the present invention；
Fig. 5 is the structural plan figure of dark anchor beam type comb-tooth bridge expansion device provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
Such as Fig. 2-Fig. 5, the embodiment of the present invention provides a kind of dark anchor beam type comb-tooth bridge expansion device, including respectively
Two pieces of fishbacks 1 on expansion joint two sides bridge member 8, the comb teeth of two fishbacks 1 interlock intercalation, each comb teeth bottom
Portion is connected with vertical ribbed stiffener 2 and is configured to beam type structure, and secretly anchoring is fixed by anchor tie plate 4 for the beam type structure
On the bridge member 8 of respective side, the anchor tie plate 4 respectively with respective side fishback fixing end and corresponding vertical ribbed stiffener
2 are connected and connect with steel bar welding inside the bridge member of respective side.
It is easy-to-understand to, above-mentioned bridge member 8 can be bridge beam body, be also possible to bridge abutment, as be located at flexible
Two bridge beam bodies of two sides are stitched, or to be located at the bridge beam body of expansion joint two sides and bridge abutment.
Above-mentioned fishback 1 is generally steel plate, generally comprises epimere and multiple comb teeth on the epimere, wherein ridge
Plate and the bridge member of respective side 8 connect, and each comb teeth is configured to the free end of the fishback 1.The comb teeth of two fishbacks 1 is handed over
The structure of wrong intercalation is the conventional structure of this field comb-tooth bridge expansion device, does not repeat herein specifically.It is apparent that stretching
Each vertical ribbed stiffener 2 of contracting seam two sides is also interlaced structure.
Such as Fig. 3 and Fig. 4, above-mentioned vertical ribbed stiffener 2 can be " I type " or " T-type " ribbed stiffener form, with fishback 1
While forming beam type structure, guarantee preferably to support corresponding fishback 1.In the present embodiment, this is vertically put more energy into
Rib 2 is preferably the vertical ribbed stiffener 2 that weldering is connected in 1 bottom of respective side fishback, reliable, stable with the connection structure of fishback 1,
Cooperative bearing is good, and easy for construction.
Above-mentioned anchor tie plate 4 is generally steel plate, is welded and fixed with fishback 1, the steel such as vertical ribbed stiffener 2 are vertically added
Strength rib 2, it is to be welded and fixed that anchor tie plate 4 is preferably also with the vertical ribbed stiffener 2；Beam type can be enhanced in the mode being welded and fixed
The overall coordination stress performance of structure.
The mode fixed with respective side bridge member 8 for above-mentioned anchor tie plate 4, such as Fig. 2 can be pre- in bridge member 8
Gantry type reinforcing bar 6 is buried, is welded by the gantry type reinforcing bar 6 and the anchor tie plate 4 of respective side；Specially gantry type reinforcing bar 6 is rectangular
Frame structure, and its underlying structure disconnects, gantry type reinforcing bar 6 during installation, should be in preparation bridge beam body or bridge
It is pre-buried that part is carried out when abutment, and two-sided welding is carried out between anchor tie plate 4 and gantry type reinforcing bar 6, beam type structure
Stability is available to be further improved.
Further, such as Fig. 2, above-mentioned anchor tie plate 4 also draws reinforcing bar 5 to connect with respective side bridge member 8 by anchor, preferably
Ground, above-mentioned gantry type reinforcing bar 6 be realize anchor tie plate 4 and bridge member 8 first pour being connected between structure, it is real that anchor, which draws reinforcing bar 5,
Being connected between structure is poured after existing anchor tie plate 4 and bridge member 8, guarantees connection structure between anchor tie plate 4 and bridge member 8
The holistic resistant behavior of stability and reliability and beam type structure.
Dark anchor beam type comb-tooth bridge expansion device provided in this embodiment, it is perpendicular by being arranged in 1 bottom of fishback
To ribbed stiffener and group is combined into beam type structure, makes comb-type telescoping device by conventional " board-like " Program for structural Transformation " beam
Formula " structural system can effectively increase the cross sectional moment of inertia and section rigidity of telescopic device, and that improves telescopic device uses the longevity
Life.
It is fixed on bridge member 8 using the drawing of beam type structure anchor, using beam type structure integrally as structure stress
System not only increases the anchoring property of fishback 1 by dark anchor structure form, while no longer being connected using traditional bolt
Form is connect, the drawbacks of traditional anchor bolt structure type is easily detached from is avoided.
Fishback 1 is symmetrically laid in bridge structure seam two sides, since telescopic device tooth plate 1 is with structural joint center displacement of the lines
Or rotation, therefore bridge longitudinal slope either beam body it is flexible caused by vertical height difference on structure without influence, fishback structure will not be by
To caused by by longitudinal height difference to the upper top power of panel.
In addition, traditional 1 technology of fishback is by increase steel with the increase of bridge beam length and the raising of telescopic device model
Plate thickness is to improve the rigidity of structure, and therefore, structure model is bigger, then groove depth is deeper between slot；And in the present embodiment, due to using
Unique beam system design, with the increasing of telescopic device model, it is only necessary to increase the thickness of two fishbacks 1 by part, and
The height (or stiffening rib steel plate thickness) that part increases vertical ribbed stiffener 2 can reach the rigidity of structure required for calculating, therefore,
Groove depth between slot can be reduced, for example, 400mm type telescopic device, the tooth plate groove depth of conventional telescopic device commonly reaches 45mm, and
Using this programme, slot groove depth is only 20mm.
It is further preferred that the vertical ribbed stiffener 2 is identical as the quantity of the comb teeth and corresponds configuration such as Fig. 5,
The bottom of i.e. each comb teeth is connected with a vertical ribbed stiffener 2, guarantees to enhance telescopic device to the support effects of fishback 1
Impact resistance.
Advanced optimize the structure of above-mentioned dark anchor beam type comb-tooth bridge expansion device, such as Fig. 2, the bridge structure of every side
Part 8 is equipped with horizontal stress and disperses steel plate 3, and the horizontal stress dispersion steel plate 3 includes the tilting section for having angle with horizontal plane,
Each vertical ribbed stiffener 2 is separately fixed on the tilting section of respective side.Disperse steel plate 3, cantilever based on the horizontal stress
In overall coordination stress, wheel impacts load can disperse steel plate 3 through horizontal stress and be transferred in bridge member 8 girder structure,
Increase the contact area between beam type structure and the concrete structure of bridge member 8, mixes load is evenly dispersed to bridge
In Xtah Crude Clay structure, bridge concrete local pressure is avoided, can preferably protect telescopic device installing zone bridge concrete；Especially
The structure of tilting section is arranged based on horizontal stress dispersion steel plate 3, is horizontal stress by the wheel impacts load decomposition of receiving for ground
And vertical stress, so that bridge member 8 is integrally born wheel impacts, more preferably to the protecting effect of bridge concrete.
It is further preferred that the horizontal stress dispersion steel plate 3 further includes being connected to the tilting section top such as Fig. 2
Horizontal segment, the horizontal segment are welded with the corresponding fishback 1.Based on the structure, make horizontal stress dispersion steel plate 3 and comb teeth
The assembling structure of plate 1, vertical ribbed stiffener 2 etc. is more stable reliable, is especially also connected as one anchor tie plate 4, makes anchor tie plate
4, horizontal stress dispersion steel plate 3, fishback 1 and vertical ribbed stiffener 2 are connected as an integrated steel-structure system, and cooperative bearing effect is more
It is good.
Such as Fig. 2, above-mentioned horizontal stress dispersion steel plate 3 further comprises vertical section, which is connected to tilting section
Bottom end is welded and fixed with corresponding anchor tie plate 4, further increases anchor tie plate 4, horizontal stress dispersion steel plate 3,1 and of fishback
The structural stability for the integrated steel-structure system that vertical ribbed stiffener 2 connects into, and can preferably transmit vertical impact load.
Above-mentioned tilting section is preferably to tilt down from its one end far from expansion joint to the one end at its close expansion joint, two
The tilting section of side is formed as bell-mouth structure of air wide at the top and narrow at the bottom, can more reliably transmit wheel load.
Advanced optimize the structure of above-mentioned dark anchor beam type comb-tooth bridge expansion device, such as Fig. 2, the dark anchor cantilever beam
Formula comb-tooth bridge expansion device further includes the water sealing structure 7 being connected on two bridge members 8, the water sealing structure 7
Below the beam type structure.The waterstop member of this field routine can be used in the water sealing structure 7, for example, by using water-stop glue
Item, the both ends of the article rubber water stop are separately fixed on the bridge member 8 of expansion joint two sides.
In a further embodiment, anti-slag dustproof construction is additionally provided with below fishback 1, which can be with
Using laminated steel plate structure etc., specifically, including two blocks of dust-proof steel plates being separately fixed on expansion joint two sides bridge member 8,
The free end of one of dust-proof steel plate is stacked to fit in another dust-proof upper surface of steel plate, is meeting with 8 phase of two sides bridge member
While to movement needs, guarantee the effect of dust-proof anti-slag.The laminated steel plate structure is located under each vertical ribbed stiffener 2
Side is further preferably positioned at the lower section of the tilting section of above-mentioned horizontal stress dispersion steel plate 3；It is further preferably positioned at upper
State the top of water sealing structure 7.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of dark anchor beam type comb-tooth bridge expansion device, including be respectively arranged on the bridge member of expansion joint two sides two
Block fishback, the comb teeth of two fishbacks interlock intercalation, it is characterised in that: each comb teeth bottom is connected with vertical ribbed stiffener simultaneously
And it is configured to beam type structure, the beam type structure is secretly anchored on the bridge member of respective side by anchor tie plate,
The anchor tie plate is connected respectively with respective side fishback fixing end and corresponding vertical ribbed stiffener and the bridge structure with respective side
Steel bar welding connects inside part.
2. dark anchor beam type comb-tooth bridge expansion device as described in claim 1, it is characterised in that: the bridge structure of every side
Part is equipped with horizontal stress and disperses steel plate, and the horizontal stress dispersion steel plate includes the tilting section for having angle with horizontal plane, respectively
The vertical ribbed stiffener is separately fixed on the tilting section of respective side.
3. dark anchor beam type comb-tooth bridge expansion device as claimed in claim 2, it is characterised in that: the horizontal stress
Dispersion steel plate further includes the horizontal segment for being connected to the tilting section top, and the horizontal segment is welded with the corresponding fishback.
4. anchor beam type comb-tooth bridge expansion device as claimed in claim 2 dark, it is characterised in that: it is each described vertical plus
Strength ribbed formula is I type or T-type form.
5. dark anchor beam type comb-tooth bridge expansion device as described in claim 1, it is characterised in that: the bridge member
Internal reinforcing bar includes the pre- gantry type reinforcing bar being embedded in the bridge member.
6. dark anchor beam type comb-tooth bridge expansion device as described in claim 1, it is characterised in that: further include being connected to
Water sealing structure on two bridge members, the water sealing structure are located at below the beam type structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317844.1A CN109930480B (en) | 2019-04-19 | 2019-04-19 | Hidden anchor cantilever beam type comb-tooth bridge expansion device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910317844.1A CN109930480B (en) | 2019-04-19 | 2019-04-19 | Hidden anchor cantilever beam type comb-tooth bridge expansion device |
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| CN109930480B CN109930480B (en) | 2024-03-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110195408A (en) * | 2019-07-09 | 2019-09-03 | 汪小鹏 | Bridge expanssion joint dust guard and its dust-proof damping device |
| CN110468698A (en) * | 2019-08-28 | 2019-11-19 | 北京毛勒桥梁设施技术有限公司 | The junction of the edges of two sheets of paper is put more energy into formula multi-directional deflection expansion joint of comb plate |
| CN110528384A (en) * | 2019-08-28 | 2019-12-03 | 天津桥通科技发展有限公司 | Novel pre-buried modular extra long life Multidirectional displacement bridge expansion device |
| CN113373803A (en) * | 2021-07-19 | 2021-09-10 | 王侃 | Embedded-pressing type waterproof and dustproof bridge expansion device, water stop and method |
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| 黄育凡;江越胜;吴庆雄;林上顺;: "钢混组合梁半整体桥设计与施工", 福州大学学报(自然科学版), no. 05, pages 96 - 102 * |
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| CN110195408A (en) * | 2019-07-09 | 2019-09-03 | 汪小鹏 | Bridge expanssion joint dust guard and its dust-proof damping device |
| CN110195408B (en) * | 2019-07-09 | 2024-05-03 | 汪小鹏 | Bridge expansion joint dustproof device and dustproof damping device thereof |
| CN110468698A (en) * | 2019-08-28 | 2019-11-19 | 北京毛勒桥梁设施技术有限公司 | The junction of the edges of two sheets of paper is put more energy into formula multi-directional deflection expansion joint of comb plate |
| CN110528384A (en) * | 2019-08-28 | 2019-12-03 | 天津桥通科技发展有限公司 | Novel pre-buried modular extra long life Multidirectional displacement bridge expansion device |
| CN113373803A (en) * | 2021-07-19 | 2021-09-10 | 王侃 | Embedded-pressing type waterproof and dustproof bridge expansion device, water stop and method |
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