CN104562925A - Expansion device with adjustable steel plate anchoring members - Google Patents
Expansion device with adjustable steel plate anchoring members Download PDFInfo
- Publication number
- CN104562925A CN104562925A CN201410821672.9A CN201410821672A CN104562925A CN 104562925 A CN104562925 A CN 104562925A CN 201410821672 A CN201410821672 A CN 201410821672A CN 104562925 A CN104562925 A CN 104562925A
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- CN
- China
- Prior art keywords
- bar
- steel plate
- casing
- anchor
- anchoring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
Abstract
The invention discloses an expansion device with adjustable steel plate anchoring members, which belongs to the technical field of bridge structure expansion devices. The expansion device comprises side beams, a middle beam, supporting crossbeams, elastic displacement components and side beam-anchoring components. The connection relation of the expansion device is as follows: the side beam-anchoring components are arranged on the side beams, meanwhile, U-shaped anchoring rebars are welded at both sides of each supporting beam box or displacement rod box, two traversing rebars are arranged to penetrate through both precast rebars and the U-shaped anchoring rebars, so the transverse supporting beam box or displacement rod box is connected with the preburied rebars and anchored; the middle beam is supported on the supporting beam boxes, and is connected with the supporting crossbeams through fixing bolts, and the elastic displacement components are fixed with the side beams or the middle beam through the displacement rod boxes. The mounting efficiency of the module expansion device for bridges can be increased.
Description
Technical field
The invention belongs to bridge construction stretching device technical field, be specifically related to a kind of stretching device with adjustable steel plate anchorage element.
Background technology
Along with the development of China's transport development, bridge engineering proportion in speedway improves constantly, and bridge extension joint, as the main Accessory Members of bridge, is one of key constructs that guarantee bridge operation safety and highway are unimpeded.Wherein modular expansion device is exactly now widely used a kind of stretching device, but existing modular expansion device use situation shows, it is very outstanding that stretching device damages phenomenon, and replacement frequency is frequent, brings potential safety hazard and Socie-economic loss to speedway operation.The mode of failure of modular expansion device shows as the damage of anchoring concrete and comes off, and the fracture of stretching device side bar, side bar come off, lateral support beam casing, displacement bar casing come off subsides and the fracture of middle joist steel.Wherein, side bar fracture, come off and anchorage zone concrete breakage particularly serious.
The anchor type that existing modular expansion device is commonly used is welded and fixed steel plate under the side bar of modular expansion device, then on steel plate, an anchoring ring is welded, several transversely distributed steelbars are set again simultaneously through anchoring ring and embedded bar, the also requirement had will cross 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 stretching device, part modular expansion device is provided with anchoring WELDING STUDS at supported box place.The force path of this anchor type is such: vertical load → in (limit) beam → supporting beam → supporting beam casing → beam body, horizontal loading → (or central sill → supporting beam →) side bar → fixation steel plate and anchoring ring → cross reinforcing bar → embedded bar.But being not difficult to find according to the actual service condition of above-mentioned modular expansion device and research, there is following defect and deficiency in this anchor type that existing modular expansion device adopts:
Defect one: most Short/Medium Span Bridge adopts the construction of multi-disc girder precast assembly, add the impact of the longitudinal and transverse slope of bridge and design superelevation, when bridge main beam is constructed there is faulting of slab ends phenomenon in vertical and horizontal, anchor bar and embedded bar is caused to misplace at vertical and horizontal, transverse reinforcement is difficult to simultaneously through anchoring ring reinforcing bar and embedded bar, only give up during construction through part anchoring ring reinforcing bar and embedded bar, the anchoring effect of modular expansion device is had a greatly reduced quality.
Defect two: at present the anchoring ring that welded by fixation steel plate with certain spacing on side bar of modular expansion device and side bar are fixed, therefore, only when stretching device anchoring ring position and construction built-in steel muscle position consistency, correct wielding neck both could realizing.In fact, due to various factors such as constructions, be difficult to ensure anchoring ring and embedded bar position consistency.In addition, if cross reinforcing bar will realize stretching device anchoring ring and the reliable anchoring of embedded bar, the two is made not to be moved, stretching device anchoring ring and embedded bar junction exactitude position when just must guarantee to construct, only can hold and cross reinforcing bar and pass, otherwise when stretching device anchoring ring is stressed, the connection of the two will produce slippage.But this exacting terms almost can not meet, because execute man-hour requirement to cross reinforcing bar through many anchoring rings and embedded bar.That is, traditional anchorage style can not make stretching device anchoring ring and embedded bar realize reliable anchoring.
Defect three: after stretching device installation, anchoring concrete generally needs 3 ~ 5 days just can reach intensity, could realize the effective anchoring of side bar, thus realize the free-extension of stretching device.But because day and night temperature is generally more than 5 DEG C, indivedual temperature difference the greater is even greater than 10 DEG C.If side bar does not realize with girder embedded bar being reliably connected, before concrete does not reach intensity, the concrete girder shrinkage strain caused by the temperature difference, makes modular expansion device anchor bar and notch cast-in-situ concrete generation break-off, will have a strong impact on anchoring concrete quality.
Defect four: modular expansion device is installed to be needed through several transverse reinforcements between stretching device anchoring ring and embedded bar, to realize the anchorage effect of stretching device and embedded bar.Due to the supported box of modular expansion device and the existence of displacement case, transverse reinforcement is made not pass lateral support beam casing and displacement case, can only block at lateral support beam casing and displacement case place, the transverse reinforcement laid not only is made troubles to construction, and the on-the-spot reinforcing bar laid can not ensure to form reliable anchoring with lateral support beam casing (displacement case) and anchoring ring.
Defect five: because anchoring WELDING STUDS is not effectively connected with girder, before notch concrete strength does not reach designing requirement, also can cause the concrete drawing crack in anchorage zone and cavitation, can have influence on the concrete service behaviour of notch on the contrary in this case.
Less than six: current modular expansion device for bridge side bar and central sill are out of shape, the situation of fracture is more.Investigation finds, the side bar of current modular expansion device for bridge is various informative, main employing " C ", " E ", the shaped steel of " Z " and " F " section form, structure numerical simulation analysis shows, part side bar is had not meet stressed needs, simultaneously because the deficiency construction of structure aspect is also difficult to reach expected design, in addition, the central sill of current modular expansion device for bridge mainly adopts frange plate width 80mm, web is 16mm, it is highly " Xiao Wang's word steel " cross section of 120mm, present situation is damaged from current bridge modulus type, in such flexural strength of beam section and anti-fatigue performance slightly inadequate, this is also one of reason causing current modular expansion device for bridge to destroy.
Less than seven: for Bridges in Mountainous Areas, because needs adapt to curved, slope, the bridge requirement such as oblique, bridge extension joint should adopt elastic device, but because of the understanding of current this respect not enough, most also employing only can adapt to longitudinal straight beam form conjugated, and causes stretching device easily to lose its function afterwards in work.
If these defects above are processed and solve, the application life of modular expansion device for bridge will be had a strong impact on, bring larger hidden danger to the traffic safety on bridge simultaneously.Therefore, improvement is optimized to existing modulus bridge expansion device very necessary to overcome the deficiencies in the prior art.
Summary of the invention
In view of this, the object of this invention is to provide a kind of stretching device with adjustable steel plate anchorage element, the problems such as the modular expansion device for bridge anchoring property existed in prior art is poor, construction and installation are difficult, girder easy fracture, displacement system inefficacy can be solved, overcome the deficiencies in the prior art, to extend the application life of modular expansion device for bridge, avoid causing maintenance costs to increase and road traffic safety problem because stretching device damages, improve the service level of road and bridge.
The present invention is achieved through the following technical solutions:
With a stretching device for adjustable steel plate anchorage element, comprising: side bar, central sill, bearing cross beam, elastic displacement assembly and side bar anchoring assembly;
Described side bar anchoring assembly comprises: junction steel plate, anchor plate, embedded bar, cross reinforcing bar, U-shaped anchor bar, supporting beam casing and displacement bar casing;
Described junction steel plate is rectangle platy structure, and soffit is provided with rectangular through holes thereon;
Described anchor plate is platy structure, is divided into T-shaped part and rectangular segment, and wherein T-shaped vertical portion and the length of side of rectangular segment are fixed to one structure;
Its annexation is as follows: on side bar, arrange junction steel plate, and junction steel plate is parallel with side bar, anchor plate is through the rectangular through holes of junction steel plate, and realize anchor plate move freely along junction steel plate by coordinating of the T-shaped vertical portion of anchor plate and the rectangular through holes of junction steel plate, anchor plate welds with embedded bar; Meanwhile, at the both sides of supporting beam casing or displacement bar casing welding U-shaped anchor bar, arrange two and cross reinforcing bar simultaneously through embedded bar and U-shaped anchor bar, realize lateral support beam casing or displacement bar casing is connected anchoring with embedded bar; Central sill is supported on supporting beam casing, is connected with bearing cross beam by set bolt, and elastic displacement assembly is fixed by displacement bar casing and side bar or central sill.
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 the upper and lower frange plate in its cross section is wide is not less than 90mm, and depth of section is not less than 120mm, and cross section web thickness is not less than 20mm.
Further, described elastic displacement assembly adopts polyurethane high molecule material.
Further, the gap between described side bar and central sill is provided with rubber fastening band.
Beneficial effect: the side bar in modular expansion device for bridge is welded and fixed by junction steel plate, horizontal round steel and adjustable anchor plate and the embedded bar arranged on pontic girder by the present invention, because adjustable anchor plate can be used by oneself slip on horizontal round steel, therefore anchor bar and embedded bar is avoided in traditional anchorage style when dislocation occurs vertical and horizontal, horizontal round steel is difficult to the situation simultaneously through anchor bar and embedded bar, substantially increases modular expansion device for bridge installation effectiveness.Secondly, the present invention is welded with U-shaped anchor bar on supporting beam casing and displacement bar casing, when stretching device is installed, 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 beam casing and displacement bar casing.And whole anchor system of the present invention all adopts welding, the anchoring of beam body and modular expansion device is very reliable, between stretching device installation period, when day and night temperature and concrete contraction itself cause internal force, can ensure that beam body is synchronous with stretching device stressed equally, modular expansion device can realize free-extension, improves the application life of modular expansion device, avoids because stretching device damages the bridge up train safety problem caused.In addition, side bar of the present invention adopts " E " shaped steel, because " E " type cross section uniform force and less by structure self torsional moment, is better than " Z " type, " F " and " C " type cross section.Simultaneously central sill adopts frange plate width 90mm, web is 20mm, be highly " king's word steel " of 120mm, owing to increasing the lifting surface area of central sill, in shock-resistant, anti-shearing, fatigue resistance and low temperature tolerance characteristics etc., be all better than common " the Xiao Wang's word steel " central sill of existing market.The durability of stretching device itself can be improved like this, extend its application life.
Accompanying drawing explanation
Fig. 1 is the top view of structural representation of the present invention;
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 fastening band, 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-anchoring concrete.
Detailed description of the invention
To develop simultaneously embodiment below in conjunction with accompanying drawing, describe the present invention.
The invention provides a kind of stretching device with adjustable steel plate anchorage element, comprising: side bar 1, central sill 2, bearing cross beam 13, elastic displacement assembly 15 and side bar anchoring assembly;
Described side bar anchoring assembly comprises: junction steel plate 3, anchor plate 5, embedded bar 6, cross reinforcing bar 7, U-shaped anchor bar 17, supporting beam casing 10 and displacement bar casing 14;
Described junction steel plate 3 is rectangle platy structure, and soffit is provided with rectangular through holes thereon;
Described anchor plate 5 is platy structure, is divided into T-shaped part and rectangular segment, and wherein T-shaped vertical portion and the length of side of rectangular segment are 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 the upper and lower frange plate in its cross section is wide is not less than 90mm, and depth of section is not less than 120mm, and cross section web thickness is not less than 20mm.
Described elastic displacement assembly 15 adopts polyurethane high molecule material.
Its annexation is as follows: on side bar 1, arrange junction steel plate 3, and junction steel plate 3 is parallel with side bar 1, anchor plate 5 is through the rectangular through holes of junction steel plate 3, and realize anchor plate 5 move freely along junction steel plate 3 by coordinating of the T-shaped vertical portion of anchor plate 5 and the rectangular through holes of junction steel plate 3, anchor plate 5 welds with embedded bar 6; Simultaneously, U-shaped anchor bar 17 is welded in the both sides of supporting beam casing 10 or displacement bar casing 14, arrange 2 and cross reinforcing bar 7 simultaneously through embedded bar 6 and U-shaped anchor bar 17, realize lateral support beam casing 10 or displacement bar casing 14 is connected anchoring with embedded bar 6; Central sill 2 is supported on supporting beam casing 10, is connected with bearing cross beam 13 by set bolt, and elastic displacement assembly 15 is fixed by displacement bar casing 14 and side bar 1 or central sill 2, and the gap between described side bar 1 and central sill 2 is provided with rubber fastening band 8.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the stretching device with adjustable steel plate anchorage element, is characterized in that, comprising: side bar (1), central sill (2), bearing cross beam (13), elastic displacement assembly (15) and side bar anchoring assembly;
Described side bar anchoring assembly comprises: junction steel plate (3), anchor plate (5), embedded bar (6), cross reinforcing bar (7), U-shaped anchor bar (17), supporting beam casing (10) and displacement bar casing (14);
Described junction steel plate (3) is rectangle platy structure, and soffit is provided with rectangular through holes thereon;
Described anchor plate (5) is platy structure, is divided into T-shaped part and rectangular segment, and wherein T-shaped vertical portion and the length of side of rectangular segment are fixed to one structure;
Its annexation is as follows: on side bar (1), arrange junction steel plate (3), and junction steel plate (3) is parallel with side bar (1), anchor plate (5) is through the rectangular through holes of junction steel plate (3), and realize anchor plate (5) move freely along junction steel plate (3) by coordinating of the T-shaped vertical portion of anchor plate (5) and the rectangular through holes of junction steel plate (3), anchor plate (5) welds with embedded bar (6); Simultaneously, U-shaped anchor bar (17) is welded in the both sides of supporting beam casing (10) or displacement bar casing (14), arrange 2 and cross reinforcing bar (7) simultaneously through embedded bar (6) and U-shaped anchor bar (17), realize lateral support beam casing (10) or displacement bar casing (14) is connected anchoring with embedded bar (6); Central sill (2) is supported on supporting beam casing (10), be connected with bearing cross beam (13) by set bolt, elastic displacement assembly (15) is fixed by displacement bar casing (14) and side bar (1) or central sill (2).
2. a kind of stretching device with adjustable steel plate anchorage element as claimed in claim 1, is characterized in that: 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.
3. a kind of stretching device with adjustable steel plate anchorage element as claimed in claim 1, it is characterized in that: described central sill (2) is " king " font section Steel Beams, the upper and lower frange plate in its cross section is wide is not less than 90mm, depth of section is not less than 120mm, and cross section web thickness is not less than 20mm.
4. a kind of stretching device with adjustable steel plate anchorage element as claimed in claim 1, is characterized in that: described elastic displacement assembly (15) adopts polyurethane high molecule material.
5. a kind of stretching device with adjustable steel plate anchorage element as claimed in claim 1, is characterized in that: the gap between described side bar (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104562925A true CN104562925A (en) | 2015-04-29 |
| CN104562925B CN104562925B (en) | 2016-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410821672.9A Active CN104562925B (en) | 2014-12-25 | 2014-12-25 | A kind of retractor device of band adjustable steel plate anchorage element |
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| Country | Link |
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Cited By (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 |
| CN107514062A (en) * | 2017-08-25 | 2017-12-26 | 孔金河 | 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 |
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| 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 |
| KR20120003542A (en) * | 2010-07-05 | 2012-01-11 | 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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2014
- 2014-12-25 CN CN201410821672.9A patent/CN104562925B/en active Active
Patent Citations (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 |
| KR20120003542A (en) * | 2010-07-05 | 2012-01-11 | 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 |
Cited By (4)
| 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 |
| CN107514062A (en) * | 2017-08-25 | 2017-12-26 | 孔金河 | Steel construction main body assembling type node and its application |
| 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 |
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| Publication number | Publication date |
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| CN104562925B (en) | 2016-11-30 |
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