CN204356649U - A kind of modular expansion device for bridge anchor structure - Google Patents
A kind of modular expansion device for bridge anchor structure Download PDFInfo
- Publication number
- CN204356649U CN204356649U CN201420845063.2U CN201420845063U CN204356649U CN 204356649 U CN204356649 U CN 204356649U CN 201420845063 U CN201420845063 U CN 201420845063U CN 204356649 U CN204356649 U CN 204356649U
- Authority
- CN
- China
- Prior art keywords
- bar
- casing
- steel
- expansion device
- modular expansion
- Prior art date
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of modular expansion device for bridge anchor structure, belong to bridge construction stretching device technical field, it comprises: side bar, junction steel plate, horizontal round steel, annular steel, embedded bar, supporting beam casing and displacement bar casing; Its annexation is as follows: on side bar, arrange junction steel plate, two horizontal round steel are through junction steel plate, two horizontal round steel and supporting beam casing or displacement bar casing are fixed, and annular steel is through two horizontal round steel and can transversely move freely by round steel, and annular steel welds with embedded bar; The utility model can realize free-extension, improves the application life of modular expansion device, avoids because stretching device damages the bridge up train safety problem caused.
Description
Technical field
The utility model belongs to bridge construction stretching device technical field, is specifically related to a kind of modular expansion device for bridge anchor structure.
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.
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 anchorage style very necessary to overcome the deficiencies in the prior art.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of modular expansion device for bridge anchor structure, can solve the modular expansion device for bridge anchoring property existed in prior art poor, install difficulty, application life dissatisfactory problem, to overcome the deficiencies in the prior art, thus extend the application life of modular expansion device for bridge, avoid because stretching device damages the bridge up train safety problem caused, improve the service level of highway bridge.
The utility model is achieved through the following technical solutions:
A kind of modular expansion device for bridge anchor structure, comprising: side bar, junction steel plate, horizontal round steel, annular steel, embedded bar, cross reinforcing bar, U-shaped anchor bar, supporting beam casing and displacement bar casing;
Its annexation is as follows: on the side bar of modular expansion device, arrange junction steel plate, 2 horizontal round steel are through junction steel plate, 2 horizontal round steel and supporting beam casing or displacement bar casing are fixed, annular steel also can transversely move freely by round steel through 2 horizontal round steel, and annular steel welds with embedded bar; Meanwhile, at the both sides of supporting beam casing or displacement bar casing welding U-shaped anchor bar, arrange 2 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.
Further, the spacing between described junction steel plate is 15cm ~ 20cm, between every two pieces of junction steel plates, be provided with an annular steel.
Beneficial effect: the side bar in modular expansion device for bridge is welded and fixed by junction steel plate, horizontal round steel and annular steel and the embedded bar arranged on pontic concrete girder by the utility model, because annular steel 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 utility model 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 traditional method at the scene intert cross reinforcing bar, this need block at supporting beam casing or displacement bar casing place and cross reinforcing bar, then segmentation intert crosses reinforcing bar, this not only makes troubles to construction, can not ensure anchoring effect.Finally, whole anchor system of the present utility model 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, improve the application life of modular expansion device, avoid because stretching device damages the bridge up train safety problem caused.
Accompanying drawing explanation
Fig. 1 is structure sectional view of the present utility model.
Fig. 2 is structural representation of the present utility model.
Wherein, 1-side bar, 2-central sill, 3-junction steel plate, the horizontal round steel of 4-, 5-annular steel, 6-embedded bar, 7-crosses reinforcing bar, 8-U shape anchor bar, 9-supporting beam casing, 10-displacement bar casing, 11-pontic concrete girder, 12-anchoring concrete.
Detailed description of the invention
To develop simultaneously embodiment below in conjunction with accompanying drawing, the utility model is described in detail.
The utility model provides a kind of modular expansion device for bridge anchor structure, comprising: side bar 1, junction steel plate 3, horizontal round steel 4, annular steel 5, embedded bar 6, cross reinforcing bar 7, U-shaped anchor bar 8, supporting beam casing 9 and displacement bar casing 10;
Its annexation is as follows: on the side bar 1 of modular expansion device, arrange junction steel plate 3,2 horizontal round steel 4 are through junction steel plate 3,2 horizontal round steel 4 are fixed with supporting beam casing 9 or displacement bar casing 10, annular steel 5 also can transversely move freely by round steel 4 through 2 horizontal round steel 4, and annular steel 5 welds with embedded bar 6; Meanwhile, at the both sides of supporting beam casing 9 or displacement bar casing 10 welding U-shaped anchor bar 8, arrange 2 and cross reinforcing bar 7 simultaneously through embedded bar 6 and U-shaped anchor bar 8, realize lateral support beam casing 9 or displacement bar casing 10 is connected anchoring with embedded bar 6.
Spacing between described junction steel plate 3 is 15cm ~ 20cm, is provided with an annular steel 5 between every two pieces of junction steel plates 3.
In sum, these are only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (2)
1. a modular expansion device for bridge anchor structure, it is characterized in that, comprising: side bar (1), junction steel plate (3), horizontal round steel (4), annular steel (5), embedded bar (6), cross reinforcing bar (7), U-shaped anchor bar (8), supporting beam casing (9) and displacement bar casing (10);
Its annexation is as follows: on the side bar (1) of modular expansion device, arrange junction steel plate (3), 2 horizontal round steel (4) are through junction steel plate (3), 2 horizontal round steel (4) are fixed with supporting beam casing (9) or displacement bar casing (10), annular steel (5) transversely to move freely by round steel (4) through 2 horizontal round steel (4), and annular steel (5) welds with embedded bar (6); Simultaneously, U-shaped anchor bar (8) is welded in the both sides of supporting beam casing (9) or displacement bar casing (10), arrange 2 and cross reinforcing bar (7) simultaneously through embedded bar (6) and U-shaped anchor bar (8), realize lateral support beam casing (9) or displacement bar casing (10) is connected anchoring with embedded bar (6).
2. a kind of modular expansion device for bridge anchor structure as claimed in claim 1, it is characterized in that, spacing between described junction steel plate (3) is 15cm ~ 20cm, between every two pieces of junction steel plates (3), be provided with an annular steel (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420845063.2U CN204356649U (en) | 2014-12-25 | 2014-12-25 | A kind of modular expansion device for bridge anchor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420845063.2U CN204356649U (en) | 2014-12-25 | 2014-12-25 | A kind of modular expansion device for bridge anchor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204356649U true CN204356649U (en) | 2015-05-27 |
Family
ID=53258128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420845063.2U Active CN204356649U (en) | 2014-12-25 | 2014-12-25 | A kind of modular expansion device for bridge anchor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204356649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562927A (en) * | 2014-12-25 | 2015-04-29 | 贵州省交通规划勘察设计研究院股份有限公司 | Bridge modular telescopic device anchoring structure |
| CN105019354A (en) * | 2015-06-05 | 2015-11-04 | 衡水橡胶股份有限公司 | Mounting method for modular anti-drop-beam expansion joint device |
-
2014
- 2014-12-25 CN CN201420845063.2U patent/CN204356649U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562927A (en) * | 2014-12-25 | 2015-04-29 | 贵州省交通规划勘察设计研究院股份有限公司 | Bridge modular telescopic device anchoring structure |
| CN105019354A (en) * | 2015-06-05 | 2015-11-04 | 衡水橡胶股份有限公司 | Mounting method for modular anti-drop-beam expansion joint device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204530418U (en) | A kind of steel plate combination beam bridge | |
| CN103266574B (en) | Simply-supported box girder bridge strengthening method with oblique cables | |
| CN203383142U (en) | Semi-rigid butt seam suitable for widening of hollow slab bridge | |
| CN108867310A (en) | The short rib T beam bridge of pretensioning prestressed concrete and its construction method | |
| CN104532741A (en) | Modular telescopic device with adjustable annular steel | |
| CN204356649U (en) | A kind of modular expansion device for bridge anchor structure | |
| CN109372543A (en) | Mangnolia officinalis competent structure and construction method are owed in a kind of tunnel-liner | |
| CN204356648U (en) | A kind of bridge extension joint anchor structure | |
| CN103806593B (en) | A kind of precast concrete | |
| CN104452580B (en) | A kind of modular expansion device for bridge anchoring process and anchor structure | |
| CN104562925A (en) | Expansion device with adjustable steel plate anchoring members | |
| CN204356646U (en) | A kind of modular expansion device with adjustable annular steel | |
| CN104562926B (en) | A kind of bridge extension joint anchor structure | |
| CN204715195U (en) | A kind of Gang Liang – concrete slab composite continuous bridge hogging moment area cracking resistance structure | |
| CN204385608U (en) | A kind of modular expansion device for bridge anchor structure | |
| Fan et al. | Repairing steel girder end corrosion using ultra-high performance concrete | |
| CN104562927A (en) | Bridge modular telescopic device anchoring structure | |
| CN205369299U (en) | Pin -connected panel precast reinforced concrete piping lane | |
| CN204551219U (en) | The stage transverse prestress structure of oblique hinged precast hollow slab beam bridge | |
| CN104372748A (en) | Steel truss diaphragm for bridge broadening new-old bridge connecting | |
| CN103806538A (en) | Precast reinforced concrete member | |
| CN204475179U (en) | Bridge construction Cast-in-situ Beam, bent cap, binder concrete attaching prestressed girder support | |
| CN103643741A (en) | Method for connecting prefabricated concrete members | |
| CN204356647U (en) | A kind of stretching device with adjustable steel plate anchorage element | |
| CN203238549U (en) | External prestressed structure of bridge body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |