CN104562925B - A kind of retractor device of band adjustable steel plate anchorage element - Google Patents
A kind of retractor device of band adjustable steel plate anchorage element Download PDFInfo
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- CN104562925B CN104562925B CN201410821672.9A CN201410821672A CN104562925B CN 104562925 B CN104562925 B CN 104562925B CN 201410821672 A CN201410821672 A CN 201410821672A CN 104562925 B CN104562925 B CN 104562925B
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- bar
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- retractor device
- displacement
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/062—Joints having intermediate beams
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/40—Plastics
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses the retractor device of a kind of band adjustable steel plate anchorage element, belong to bridge structure retractor device technical field, it includes: side bar, central sill, bearing cross beam, elastic displacement assembly and side bar anchoring assembly；Its annexation is as follows: arrange side bar anchoring assembly on side bar, simultaneously, U-shaped anchor bar is welded in the both sides of backbar casing or displacement bar casing, arrange two and cross reinforcing bar also cross embedded bar and U-shaped anchor bar, it is achieved lateral support spar-box body or displacement bar casing are connected anchoring with embedded bar；Central sill is supported on backbar casing, is connected with bearing cross beam by fixing bolt, and elastic displacement assembly is fixed with side bar or central sill by displacement bar casing；Modular expansion device for bridge installation effectiveness can be improved.
Description
Technical field
The invention belongs to bridge structure retractor device technical field, be specifically related to the flexible dress of a kind of band adjustable steel plate anchorage element
Put.
Background technology
Along with the development of China's transport development, science of bridge building proportion in highway improves constantly, and bridge extension joint is made
For the main Accessory Members of bridge, it is to ensure that one of bridge operation safety and the unimpeded key constructs of highway.Wherein modulus type stretches
Device is exactly now widely used a kind of retractor device, but existing modular expansion device use situation shows, flexible dress
Putting damage phenomenon the most prominent, replacement frequency is frequent, brings potential safety hazard and Socie-economic loss to highway operation.Modulus
The failure mode of formula retractor device shows as anchoring concrete damage and comes off, and the fracture of retractor device side bar, side bar come off, laterally prop up
Bolster casing, displacement bar casing come off and subside and the fracture of middle joist steel.Wherein, side bar ruptures, comes off and the breakage of anchorage zone concrete
It is particularly acute.
The anchor type that existing modular expansion device is conventional is to be welded and fixed steel plate, so under the side bar of modular expansion device
After on steel plate, weld an anchoring ring, more several transversely distributed steelbars are set also cross anchoring ring and embedded bar, have also
Requirement will travel across reinforcing bar or anchoring ring welds with notch embedded bar, thus realizes the anchoring of modular expansion device.In order to strengthen
The anchoring effect of retractor device, part modular expansion device is provided with anchoring WELDING STUDS at supported box.This anchor type
Force path be such that vertical load → in (limit) beam → backbar → backbar casing → beam body, horizontal loading → (or
Central sill → backbar →) side bar → fixation steel plate and anchoring ring → cross reinforcing bar → embedded bar.But, according to above-mentioned modulus type
The actually used situation of retractor device and research it is seen that, this anchor type that existing modular expansion device uses exist with
Lower defect and deficiency:
Defect one: most Short/Medium Span Bridges use the construction of multi-disc girder precast assembly, adds the longitudinal and transverse slope of bridge and design superelevation
Impact, when bridge main beam is constructed there is faulting of slab ends phenomenon in vertical and horizontal, causes anchor bar and embedded bar longitudinal and horizontal
To misplacing, transverse steel is difficult to also cross anchoring ring reinforcing bar and embedded bar, only gives up through part anchoring during construction
Ring reinforcing bar and embedded bar, make the anchoring effect of modular expansion device have a greatly reduced quality.
Defect two: at present modular expansion device is along the anchoring ring welded by fixation steel plate with certain spacing on side bar and limit
Beam is fixed, and therefore, only when retractor device anchoring ring position is with construction built-in steel muscle position consistency, could realize the two correct
Wielding neck.It practice, due to many factors impacts such as constructions, it is difficult to ensure that anchoring ring and embedded bar position consistency.Additionally,
If crossing reinforcing bar retractor device to be realized anchoring ring reliably to anchor with embedded bar, making the two not be moved, being necessary for guaranteeing
Retractor device anchoring ring and embedded bar junction exactitude position during construction, is only capable of receiving and crosses reinforcing bar and pass, otherwise when flexible dress
When putting anchoring ring stress, the connection of the two will produce sliding.But this exacting terms is practically impossible to meet, because
Execute man-hour requirement and cross reinforcing bar through many anchoring rings and embedded bar.It is to say, traditional anchorage style can not make flexible dress
Put anchoring ring and realize anchoring reliably with embedded bar.
Defect three: after installing due to retractor device, anchoring concrete, it is generally required to 3～5 days can be only achieved intensity, could realize
Side bar effectively anchors, thus realizes freely stretching of retractor device.But, due to day and night temperature typically more than 5 DEG C, individually
Temperature difference the greater is even greater than 10 DEG C.If side bar does not realizes being reliably connected with girder embedded bar, it is not up to intensity at concrete
Before, the temperature difference concrete girder contraction distortion caused, make modular expansion device anchor bar occur with notch cast-in-place concrete
Break-off, will have a strong impact on anchoring concrete quality.
Defect four: modular expansion device is installed to be needed between retractor device anchoring ring and embedded bar through several transverse steels,
To realize the anchorage effect of retractor device and embedded bar.Due to supported box and the existence of displacement case of modular expansion device, make
Obtain transverse steel and cannot pass through lateral support spar-box body and displacement case, can only block at lateral support spar-box body and displacement case, cloth
If transverse steel not only make troubles to construction, and the on-the-spot reinforcing bar laid it cannot be guaranteed that with lateral support spar-box body (displacement
Case) form anchoring reliably with anchoring ring.
Defect five: owing to anchoring WELDING STUDS is not effectively connected with girder, before not up to design requires at notch concrete strength, also
Drawing crack and the cavitation of anchorage zone concrete can be caused, influence whether the service behaviour of notch concrete the most on the contrary.
Less than six: the situation of modular expansion device for bridge side bar and central sill deformation, fracture is more at present.Investigation finds, at present
The side bar of modular expansion device for bridge is various informative, the main shaped steel using " C ", " E ", " Z " and " F " section form,
Structure numerical simulation analysis shows, has part side bar and is unsatisfactory for stress needs, simultaneously because the not enough construction in terms of structure is also difficult
To reach expected design, it addition, the central sill of current modular expansion device for bridge mainly uses flange plate width 80mm, web is
16mm, height is " Xiao Wang's word steel " cross section of 120mm, from the point of view of current bridge modulus type damages present situation, beam section in such
Bending strength and anti-fatigue performance the most inadequate, this is also one of reason of causing current modular expansion device for bridge to destroy.
Less than seven: for Bridges in Mountainous Areas, owing to needs adapt to curved, slope, the bridge requirement such as tiltedly, bridge extension joint preferably uses bullet
Property device, but because the understanding of current this respect is not enough, most straight beam forms only adapting to longitudinally conjugate that also use, cause flexible
Its function is easily lost after device busy.
If the above defect is processed and is solved, it will have a strong impact on the service life of modular expansion device for bridge,
Bring bigger hidden danger to the traffic safety on bridge simultaneously.Therefore, existing modulus bridge expansion device is optimized improvement
To overcome the deficiencies in the prior art the most necessary.
Summary of the invention
In view of this, it is an object of the invention to provide the retractor device of a kind of band adjustable steel plate anchorage element, it is possible to solve existing
Present in technology, modular expansion device for bridge anchoring property is poor, construction and installation difficulty, girder easy fracture, displacement system lost efficacy
Etc. problem, overcome the deficiencies in the prior art, to extend the service life of modular expansion device for bridge, it is to avoid due to retractor device
Damage causes maintenance costs to increase and road traffic safety problem, improves the service level of road and bridge.
The present invention is achieved through the following technical solutions:
A kind of retractor device of band adjustable steel plate anchorage element, including: side bar, central sill, bearing cross beam, elastic displacement assembly
And side bar anchoring assembly；
Described side bar anchoring assembly includes: junction steel plate, anchor plate, embedded bar, cross reinforcing bar, U-shaped anchor bar,
Backbar casing and displacement bar casing；
Described junction steel plate is rectangle platy structure, and the surface vertical with its thickness direction is provided with rectangle along its length
Through hole；
Described anchor plate is platy structure, is divided into T-shaped part and rectangular segment, the most T-shaped vertical portion and length
The length of side of projected square part is fixed to one structure；
Its annexation is as follows: arrange junction steel plate on side bar, and junction steel plate is parallel with side bar, and anchor plate is through connecting
The rectangular through holes of steel plate, and coordinate realization by the rectangular through holes of the T-shaped vertical portion of anchor plate and junction steel plate
Anchor plate moves freely along junction steel plate, and anchor plate welds with embedded bar；Meanwhile, at backbar casing or displacement bar case
The both sides welding U-shaped anchor bar of body, arranges two and crosses reinforcing bar also cross embedded bar and U-shaped anchor bar, it is achieved be horizontal
Anchoring it is connected with embedded bar to backbar casing or displacement bar casing；Central sill is supported on backbar casing, by fixing bolt
Being connected with bearing cross beam, elastic displacement assembly is fixed with side bar or central sill by displacement bar casing.
Further, described side bar is " E " type section Steel Beams, and its deck-molding is not less than 80mm, and web thickness is not less than 15mm.
Further, described central sill is " king " font section Steel Beams, and its cross section upper and lower flange plate width is not less than 90mm, cross section
Highly not less than 120mm, cross section web thickness is not less than 20mm.
Further, described elastic displacement assembly uses polyurethane high molecule material.
Further, the gap between described side bar and central sill is provided with rubber fastening band.
Beneficial effect: the present invention is welded with U-shaped anchor bar on backbar casing and displacement bar casing, installs at retractor device
Time, make to cross after reinforcing bar penetrates U-shaped anchor bar and embedded bar and be welded and fixed with U-shaped anchor bar and embedded bar, thus
Realize the anchoring of lateral support spar-box body and displacement bar casing.And the whole anchor system of the present invention all uses welding, beam body with
The anchoring of modular expansion device is very reliable, during retractor device is installed, causes when day and night temperature and concrete itself shrink
During internal force, can ensure beam body stress Tong Bu with retractor device equally, modular expansion device can realize freely stretching, and improves modulus
The service life of formula retractor device, it is to avoid owing to retractor device damages the bridge up train safety problem caused.Additionally, the present invention
Side bar use " E " shaped steel because " E " type cross section uniform force and less by structure self torsional moment, be better than " Z "
Type, " F " and " C " type cross section.Central sill uses flange plate width 90mm, web to be 20mm simultaneously, height is the " big of 120mm
King's word steel ", owing to increasing the lifting surface area of central sill, at aspects such as impact resistance, anti-shearing, fatigue resistance and low temperature tolerance characteristicses
" Xiao Wang's word steel " central sill that existing market is common will be better than.So can improve the durability of retractor device itself, extend it
Service life.
Accompanying drawing explanation
Fig. 1 is the top view of present configuration schematic diagram；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is the B-B sectional view of Fig. 1；
Wherein: 1-side bar, 2-central sill, 3-junction steel plate, 5-anchor plate, 6-embedded bar, 7-crosses reinforcing bar, 8-rubber
Waterstop, 9-pontic girder, 10-bearing cross beam casing, 11-compressing support, 12-bearing, 13-bearing cross beam, 14-
Displacement bar casing, 15-elastic displacement device, 16-anchor bolt, 17-U shape anchor bar, 18-anchors concrete.
Detailed description of the invention
Develop simultaneously embodiment below in conjunction with the accompanying drawings, describes the present invention.
The invention provides the retractor device of a kind of band adjustable steel plate anchorage element, including: side bar 1, central sill 2, bearing cross beam
13, elastic displacement assembly 15 and side bar anchoring assembly；
Described side bar anchoring assembly includes: junction steel plate 3, anchor plate 5, embedded bar 6, cross reinforcing bar 7, U-shaped anchoring
Reinforcing bar 17, backbar casing 10 and displacement bar casing 14；
Described junction steel plate 3 is rectangle platy structure, and it is rectangular that the surface vertical with its thickness direction is provided with along its length
Shape through hole；
Described anchor plate 5 is platy structure, is divided into T-shaped part and rectangular segment, the most T-shaped vertical portion with
The length of side of rectangular segment is fixed to one structure；
Described side bar 1 is " E " type section Steel Beams, and its deck-molding is not less than 80mm, and web thickness is not less than 15mm.
Described central sill 2 is " king " font section Steel Beams, and its cross section upper and lower flange plate width is not less than 90mm, and depth of section is the least
In 120mm, cross section web thickness is not less than 20mm.
Described elastic displacement assembly 15 uses polyurethane high molecule material.
Its annexation is as follows: arrange junction steel plate 3 on side bar 1, and junction steel plate 3 is parallel with side bar 1, anchor plate 5
Through the rectangular through holes of junction steel plate 3, and by the rectangle of the T-shaped vertical portion of anchor plate 5 with junction steel plate 3
The cooperation of through hole realizes anchor plate 5 and moves freely along junction steel plate 3, and anchor plate 5 welds with embedded bar 6；Meanwhile,
Weld U-shaped anchor bar 17 in the both sides of backbar casing 10 or displacement bar casing 14, arrange 2 and cross reinforcing bar 7 and wear simultaneously
Cross embedded bar 6 and U-shaped anchor bar 17, it is achieved lateral support spar-box body 10 or displacement bar casing 14 are with embedded bar 6 even
Connect anchoring；Central sill 2 is supported on backbar casing 10, is connected with bearing cross beam 13 by fixing bolt, elastic displacement assembly
15 are fixed with side bar 1 or central sill 2 by displacement bar casing 14, and the gap between described side bar 1 and central sill 2 is provided with rubber
Glue waterstop 8.
In sum, these are only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the protection of the present invention
Within the scope of.
Claims (5)
1. the retractor device of a band adjustable steel plate anchorage element, it is characterised in that including: side bar (1), central sill (2),
Bearing cross beam (13), elastic displacement assembly (15) and side bar anchoring assembly；
Described side bar anchoring assembly includes: junction steel plate (3), anchor plate (5), embedded bar (6), cross reinforcing bar (7),
U-shaped anchor bar (17), backbar casing (10) and displacement bar casing (14)；
Described junction steel plate (3) is rectangle platy structure, is provided with rectangle at it leads near surface and the opposite thereof at expansion joint
Hole；
Described anchor plate (5) is platy structure, is divided into T-shaped part and rectangular segment, the most T-shaped vertical portion
It is fixed to one structure with the length of side of rectangular segment；
Its annexation is as follows: arrange junction steel plate (3) on side bar (1), and junction steel plate (3) is parallel with side bar (1),
Anchor plate (5) through the rectangular through holes of junction steel plate (3), and by the T-shaped vertical portion of anchor plate (5) with
The cooperation of the rectangular through holes of junction steel plate (3) realizes anchor plate (5) and moves freely along junction steel plate (3), anchor plate
(5) weld with embedded bar (6)；Meanwhile, U is welded in the both sides of backbar casing (10) or displacement bar casing (14)
Shape anchor bar (17), arranges 2 and crosses reinforcing bar (7) also cross embedded bar (6) and U-shaped anchor bar (17),
Realize lateral support spar-box body (10) or displacement bar casing (14) is connected anchoring with embedded bar (6)；Central sill (2) supports
On backbar casing (10), being connected with bearing cross beam (13) by fixing bolt, elastic displacement assembly (15) passes through position
Move bar casing (14) to fix with side bar (1) or central sill (2).
The retractor device of a kind of band adjustable steel plate anchorage element the most as claimed in claim 1, it is characterised in that: described limit
Beam (1) is " E " type section Steel Beams, and its deck-molding is not less than 80mm, and web thickness is not less than 15mm.
The retractor device of a kind of band adjustable steel plate anchorage element the most as claimed in claim 1, it is characterised in that: in described
Beam (2) is " king " font section Steel Beams, and its cross section upper and lower flange plate width is not less than 90mm, and depth of section is not less than 120mm,
Cross section web thickness is not less than 20mm.
The retractor device of a kind of band adjustable steel plate anchorage element the most as claimed in claim 1, it is characterised in that: described bullet
Property displacement component (15) use polyurethane high molecule material.
The retractor device of a kind of band adjustable steel plate anchorage element the most as claimed in claim 1, it is characterised in that: described limit
Gap between beam (1) and central sill (2) is provided with rubber fastening band (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410821672.9A CN104562925B (en) | 2014-12-25 | 2014-12-25 | A kind of retractor device of band adjustable steel plate anchorage element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410821672.9A CN104562925B (en) | 2014-12-25 | 2014-12-25 | A kind of retractor device of band adjustable steel plate anchorage element |
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| Publication Number | Publication Date |
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| CN104562925A CN104562925A (en) | 2015-04-29 |
| CN104562925B true CN104562925B (en) | 2016-11-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299590A (en) * | 2017-07-07 | 2017-10-27 | 中铁第四勘察设计院集团有限公司 | Double-joint shallow shaped steel formula bridge extension joint |
| CN107514062B (en) * | 2017-08-25 | 2019-05-07 | 青岛昊宇重工有限公司 | Steel construction main body assembling type node and its application |
| CN115787454A (en) * | 2022-11-23 | 2023-03-14 | 江苏久兴建设工程有限公司 | Fully-assembled modular bridge expansion device and installation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2505512Y (en) * | 2001-10-12 | 2002-08-14 | 陈光和 | Shallow slot bridge expansion device |
| CN201567527U (en) * | 2009-11-27 | 2010-09-01 | 成都市虹筑路桥机械有限公司 | Double-joint super-shallow buried profile steel bridge expansion device |
| KR101208031B1 (en) * | 2010-07-05 | 2012-12-04 | 유니슨이테크 주식회사 | expansion and contraction jointing device for bridge |
| CN203569476U (en) * | 2013-11-17 | 2014-04-30 | 庞永贞 | Slip box of retractor device for highway bridge |
| CN104233953A (en) * | 2014-09-26 | 2014-12-24 | 陈逵 | Modular intelligent bridge expansion joint |
| CN204356646U (en) * | 2014-12-25 | 2015-05-27 | 贵州省交通规划勘察设计研究院股份有限公司 | A kind of modular expansion device with adjustable annular steel |
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