CN104452580B - A kind of modular expansion device for bridge anchoring process and anchor structure - Google Patents
A kind of modular expansion device for bridge anchoring process and anchor structure Download PDFInfo
- Publication number
- CN104452580B CN104452580B CN201410679891.8A CN201410679891A CN104452580B CN 104452580 B CN104452580 B CN 104452580B CN 201410679891 A CN201410679891 A CN 201410679891A CN 104452580 B CN104452580 B CN 104452580B
- Authority
- CN
- China
- Prior art keywords
- bar
- expansion device
- casing
- modular expansion
- round steel
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of modular expansion device for bridge anchoring process and anchor structure, this anchor structure arranges junction steel plate on the side bar of modular expansion device, 2 horizontal round steel are through junction steel plate, 2 horizontal round steel and supporting beam casing or displacement bar casing are fixed, adjustable anchor plate with circular hole also can transversely move freely by round steel through 2 horizontal round steel, and adjustable 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 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.The present invention solve the modular expansion device for bridge anchoring property existed in prior art poor, install difficulty, application life dissatisfactory problem.
Description
Technical field
The present invention relates to a kind of modular expansion device for bridge anchoring process and anchor structure, belong to bridge construction stretching device technical field.
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 at 5 more than C, indivedual temperature difference the greater is even greater than 10 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
The object of the invention is to provide a kind of modular expansion device for bridge anchoring process and anchor structure, solve in prior art the modular expansion device for bridge anchoring property existed poor, dissatisfactory problem in difficult, application life is installed, 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.
For realizing the object of the invention, present invention employs following technical scheme: first, technical scheme of the present invention is applied to the anchor system of the modular expansion device of bridge, the side bar of modular expansion device and junction steel plate are welded and fixed at a certain distance, junction steel plate arranges two horizontal round steel, and adjustable anchor plate is set on horizontal round steel, adjustable anchor plate can move along horizontal round steel, during construction, adjustable anchor plate is adjusted to notch embedded bar position to weld with embedded bar, realize modular expansion device side bar to be connected with the reliable of embedded bar, in addition, on supporting beam box side and on displacement bar box side, weld U-shaped anchor bar, utilize and cross reinforcing bar through U-shaped anchor bar and embedded bar, realize supporting beam casing or displacement bar casing is connected with the effective of embedded bar.
In said method, horizontal round steel is penetrated after fixing connection steel plate and adjustable anchor plate is adjacent between two, horizontal round steel is blocking with supporting beam casing or displacement bar casing intersection, itself and supporting beam casing or displacement bar welding box body is fixed in the truncated position of horizontal round steel.
After adjustable anchor plate and embedded bar are welded and fixed, more adjustable anchor plate and horizontal round steel are welded and fixed.
Between modular expansion device for bridge and pontic concrete girder, build anchoring concrete, after anchoring concrete setting, make modular expansion device for bridge and pontic concrete girder connect into an entirety.
A kind of modular expansion device for bridge anchor structure, the side bar of modular expansion device arranges 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, adjustable anchor plate with circular hole also can transversely move freely by round steel through 2 horizontal round steel, and adjustable 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 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.
Spacing between described junction steel plate is 15cm ~ 20cm, between every two pieces of junction steel plates, be provided with one piece of adjustable anchor plate.
Owing to adopting technique scheme, the invention has the advantages that: 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 concrete 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 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 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, 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 the top view of structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1.
Description of reference numerals: 1-side bar, 2-central sill, 3-junction steel plate, the horizontal round steel of 4-, the cotton strainer of 5-PP, 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
In order to make the object of the invention, technical scheme and advantage clearly, below in conjunction with drawings and Examples, the present invention is described in further detail.
Embodiment
Fig. 1 illustrates modulus stretching device anchor system of the present invention structure and illustrates to sectional elevation along bridge, as we can see from the figure, stretching device anchor system structure of the present invention is for modular expansion device for bridge, and mainly comprise junction steel plate 3, adjustable anchor plate 5, horizontal round steel 4, crosses reinforcing bar 7 simultaneously through embedded bar 6 and U-shaped anchor bar 8.Junction steel plate (3) is connected with the side bar 1 of modular expansion device, and adjustable anchor plate 5 is connected with junction steel plate 3 by horizontal round steel 4, and adjustable anchor plate 5 is welded and fixed with the embedded bar 6 be embedded in pontic concrete girder 11.
Composition graphs 2 is seen together, horizontal round steel 4 firmly welds together with the side plate of junction steel plate 3, supporting beam casing 9, the adjustable anchor plate 5 being provided with 2 circular holes can be free to slide along horizontal round steel 4, according to embedded bar 6 position from Row sum-equal matrix, can guarantee that adjustable anchor plate 5 realizes welding with embedded bar 6 during construction.Distance every 15cm ~ 20cm arranges one piece of junction steel plate 3 and adjustable anchor plate 5, and all has setting at supporting beam casing 9 or displacement bar casing 10 both sides.U-shaped anchor bar 8 is welded in the both sides of supporting beam casing 9 or displacement bar casing 10, then will cross reinforcing bar 7 through all embedded bar 6 of notch and U-shaped anchor bar 8, realize supporting beam casing 9 or displacement bar casing 10 is welded and fixed with the embedded bar 6 in pontic concrete girder 11.
In addition, can also see from Fig. 1, junction steel plate 3 and adjustable anchor plate 5 are all positioned at the below of modular expansion device, at the two by carrying out perforate in the position designed in advance, realize power transmission with horizontal round steel 4.Can also consider to increase adjustable anchor plate 5 size according to construction error when making, increasing the connection space of adjustable anchor plate 5 and embedded bar 6.
The present invention is by after above-mentioned modulus stretching device and pontic concrete girder 11 anchoring, from force path aspect, the vertical load of modular expansion device is still delivered to pontic concrete girder 11 by supporting beam casing 9, but its horizontal force path is: horizontal loading → or central sill 2 → supporting beam → side bar 1 → junction steel plate 3 → horizontal round steel 4 → adjustable anchor plate 5 → embedded bar 6.Therefore, have employed technical scheme of the present invention, when bridge is being subject to, in the situations such as temperature action, vehicular impact, transversal inhomogeneity be stressed, can ensureing that load is effectively delivered in pontic concrete girder 11.
Claims (6)
1. a modular expansion device for bridge anchoring process, it is characterized in that: the side bar (1) of modular expansion device and junction steel plate (3) are welded and fixed at a certain distance, junction steel plate (3) arranges two horizontal round steel (4), and adjustable anchor plate (5) is set on horizontal round steel (4), adjustable anchor plate (5) can be mobile along horizontal round steel (4), embedded bar (6) position adjustable anchor plate (5) being adjusted to notch during construction is welded with embedded bar (6), realize the side bar (1) of modular expansion device and reliable connection of embedded bar (6), in addition, U-shaped anchor bar (8) is welded on supporting beam casing (9) side plate and on displacement bar casing (10) side plate, utilization crosses reinforcing bar (7) through U-shaped anchor bar (8) and embedded bar (6), realizes effective connection of supporting beam casing (9) or displacement bar casing (10) and embedded bar (6).
2. modular expansion device for bridge anchoring process according to claim 1, it is characterized in that: after fixing connection steel plate (3) and adjustable anchor plate (5) is adjacent between two, penetrate horizontal round steel (4), horizontal round steel (4) is being blocked with supporting beam casing (9) or displacement bar casing (10) intersection, itself and supporting beam casing (9) or displacement bar casing (10) is welded and fixed in the truncated position of horizontal round steel (4).
3. modular expansion device for bridge anchoring process according to claim 1, is characterized in that: after adjustable anchor plate (5) and embedded bar (6) being welded and fixed, more adjustable anchor plate (5) and horizontal round steel (4) are welded and fixed.
4. modular expansion device for bridge anchoring process according to claim 1, it is characterized in that: between modular expansion device for bridge and pontic concrete girder (11), build anchoring concrete (12), after anchoring concrete (12) solidifies, modular expansion device for bridge and pontic concrete girder (11) is made to connect into an entirety.
5. the modular expansion device for bridge anchor structure based on method described in claim 1, it is characterized in that: on the side bar (1) of modular expansion device, junction steel plate (3) is set, 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), adjustable anchor plate (5) with circular hole is through 2 horizontal round steel (4) and can transversely move freely by round steel (4), and adjustable anchor plate (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).
6. modular expansion device for bridge anchor structure according to claim 5, is characterized in that: the spacing between described junction steel plate (3) is 15cm ~ 20cm, between every two pieces of junction steel plates (3), be provided with one piece of adjustable anchor plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410679891.8A CN104452580B (en) | 2014-11-24 | 2014-11-24 | A kind of modular expansion device for bridge anchoring process and anchor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410679891.8A CN104452580B (en) | 2014-11-24 | 2014-11-24 | A kind of modular expansion device for bridge anchoring process and anchor structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104452580A CN104452580A (en) | 2015-03-25 |
| CN104452580B true CN104452580B (en) | 2015-09-16 |
Family
ID=52899281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410679891.8A Active CN104452580B (en) | 2014-11-24 | 2014-11-24 | A kind of modular expansion device for bridge anchoring process and anchor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104452580B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939551A (en) * | 2017-03-23 | 2017-07-11 | 武汉理工大学 | A kind of cable cohesion device |
| CN106894335A (en) * | 2017-04-25 | 2017-06-27 | 中国冶集团有限公司 | Modulus bridge expansion device and its installation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2309359Y (en) * | 1997-07-10 | 1999-03-03 | 黄忠浩 | Sloping beam central-axis controlled bridge expansion apparatus |
| CN2375664Y (en) * | 1999-03-04 | 2000-04-26 | 成都市新津新筑路桥机械有限公司 | Bridge double-joint shallow expansion device |
| JP2009155936A (en) * | 2007-12-27 | 2009-07-16 | Nitta Ind Corp | Expansion device for bridge |
| CN104005335A (en) * | 2014-06-16 | 2014-08-27 | 衡水宝力工程橡胶有限公司 | Six-freedom-degree modular pattern telescopic device and manufacturing technology thereof |
| CN204385608U (en) * | 2014-11-24 | 2015-06-10 | 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 for bridge anchor structure |
-
2014
- 2014-11-24 CN CN201410679891.8A patent/CN104452580B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2309359Y (en) * | 1997-07-10 | 1999-03-03 | 黄忠浩 | Sloping beam central-axis controlled bridge expansion apparatus |
| CN2375664Y (en) * | 1999-03-04 | 2000-04-26 | 成都市新津新筑路桥机械有限公司 | Bridge double-joint shallow expansion device |
| JP2009155936A (en) * | 2007-12-27 | 2009-07-16 | Nitta Ind Corp | Expansion device for bridge |
| CN104005335A (en) * | 2014-06-16 | 2014-08-27 | 衡水宝力工程橡胶有限公司 | Six-freedom-degree modular pattern telescopic device and manufacturing technology thereof |
| CN204385608U (en) * | 2014-11-24 | 2015-06-10 | 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 for bridge anchor structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104452580A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105839510A (en) | Steel-ultra-high-performance concrete combined continuous beam bridge structure and construction method thereof | |
| CN103334374B (en) | PCSS shearing coupling arrangement | |
| KR100265697B1 (en) | Anchoring method and apparatus for improving end bearing structure in external prestress reinforcement | |
| KR20130136847A (en) | End continuing method of wire truss decks | |
| CN104452580B (en) | A kind of modular expansion device for bridge anchoring process and anchor structure | |
| CN106894335A (en) | Modulus bridge expansion device and its installation method | |
| CN104532741A (en) | Modular telescopic device with adjustable annular steel | |
| CN204356649U (en) | A kind of modular expansion device for bridge anchor structure | |
| CN204356648U (en) | A kind of bridge extension joint anchor structure | |
| CN204385608U (en) | A kind of modular expansion device for bridge anchor structure | |
| CN204715195U (en) | A kind of Gang Liang – concrete slab composite continuous bridge hogging moment area cracking resistance structure | |
| CN104562926B (en) | A kind of bridge extension joint anchor structure | |
| CN104562925A (en) | Expansion device with adjustable steel plate anchoring members | |
| CN111795212B (en) | Suspension method and suspension structure for pipeline crossing foundation pit | |
| CN204356646U (en) | A kind of modular expansion device with adjustable annular steel | |
| CN211395402U (en) | Municipal works road and bridge crack restoration fixed knot constructs | |
| KR100690395B1 (en) | Continuous Beam Construction Method of Prestressed Concrete Beam | |
| CN104562927A (en) | Bridge modular telescopic device anchoring structure | |
| CN113026555A (en) | Combined beam structure of prefabricated steel plate beam and combined bridge deck | |
| CN106930188B (en) | A kind of multi-functional anchor tube type anchor tie plate | |
| CN214696353U (en) | S-shaped connecting node of full precast concrete floor slab | |
| KR102151046B1 (en) | High Strength Segment Girder with Enlarged Joint Section and Construction Method of High Strength Segment Girder | |
| CN204401451U (en) | A kind of modular expansion device with adjustable steel plate anchorage element | |
| CN103572669B (en) | Ballast bed and tunnel bottom defect regulating and constructing method as well as anchoring device | |
| CN105648911B (en) | Bridge construction Cast-in-situ Beam, bent cap, binder concrete adhesion type prestressed girder support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |