CN202509406U - Guide beam combination part construction used for pushing concrete beam - Google Patents
Guide beam combination part construction used for pushing concrete beam Download PDFInfo
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- CN202509406U CN202509406U CN2011205599980U CN201120559998U CN202509406U CN 202509406 U CN202509406 U CN 202509406U CN 2011205599980 U CN2011205599980 U CN 2011205599980U CN 201120559998 U CN201120559998 U CN 201120559998U CN 202509406 U CN202509406 U CN 202509406U
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Abstract
The utility model discloses a guide beam combination part construction used for pushing a concrete beam, which comprises a concrete girder end part and a connecting piece for being connected with a steel guide beam, wherein the connecting piece is embedded in the concrete girder end part, and the inside of the concrete girder end part is provided with prestressed tendons. According to the guide beam combination part construction used for pushing the concrete beam, the longitudinal prestressed tendons of the concrete girder are directly anchored to the connecting piece connected with the steel guide beam, the integral connection between the steel guide beam and the concrete girder structure is enhanced, the stressed state of the combination section of the concrete girder and the steel guide beam is effectively improved, and the safety of a combination part in the whole pushing process is guaranteed.
Description
Technical field
The utility model belongs to the concrete technology field, particularly relates to a kind of concrete beam pushing tow and constructs with the nose girder joint portion.
Background technology
In the concrete beam incremental launching construction, generally in the front portion of girder pushing tow direction of advance the steel work nose girder being set reduces the pushing tow span, to reduce the maximum positive hogging moment in the concrete girder pushing tow process, improves the force-bearing situation of girder.Sometimes also back launching nose is set at the concrete girder afterbody.The general way of concrete beam and steel nose girder joint portion is that pre-buried steel plate or shaped steel stretch out girder on the top, in the base plate, again with the assembly unit moulding after nose girder be connected.
In the pushing tow process, positive hogging moment will alternately appear in concrete girder and nose girder binding site, and tension and compression stress longitudinally alternately appears in top board and base plate; When girder section is very wide; The appearance that laterally also is attended by tension and compression stress of girder section roof and floor, the space-load situation is very complicated, in addition the difference of girder and nose girder materials used performance; Make that being configured in the incremental launching construction design of nose girder joint portion is extremely important, become one of key of control pushing tow success or not.
In the actual engineering, because the imperfection on design and the treatment of details makes concrete nose girder adapter section the situation of cracking in the pushing tow process, often occur." ten tops nine are split " becomes common phenomena in the incremental launching construction.The cracking of girder has had a strong impact on carrying out smoothly of incremental launching construction, has damaged the girder durability, even has injured the safety of structure of main bridge in the future, has also restricted the promotion and application of push construction method greatly.
Summary of the invention
The technical problem that (one) will solve
The technical problem that the utility model will solve is: the situation of cracking often appears in available coagulation soil nose girder adapter section in the pushing tow process, had a strong impact on carrying out smoothly of incremental launching construction, has damaged the girder durability.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of concrete beam pushing tow to construct with the nose girder joint portion.
Wherein, said structure comprises concrete girder end and the connector that is connected steel nose girder, and said connector is embedded in the concrete girder end, and said concrete girder is provided with presstressed reinforcing steel in the end.
Preferably, said connector and steel nose girder link together through bolt.
Preferably, said connector and steel nose girder weld together.
Preferably, said concrete girder end comprises top board and base plate, and said top board is positioned at the top of base plate, in said top board and base plate, is provided with the transverse prestress muscle.
Preferably, said connector is made up of steel plate, and said steel plate is embedded in top board and the base plate, and said transverse prestress muscle passes the steel plate of burying underground on top board and the base plate.
Preferably, be filled with concrete between the top board of said concrete girder end and the base plate.
The concrete thickness of preferably, filling between said top board and the base plate is 1/3～1/2 of a concrete girder height.
Preferably, said connector is fixedly connected on the concrete girder end through WELDING STUDS.
(3) beneficial effect
Technique scheme has following advantage: on the connector that the longitudinal prestressing muscle directly anchors to steel nose girder is connected of the utility model with concrete girder itself; Having strengthened steel nose girder is connected with the integral body of concrete girder structure; Effectively improve the stress of ultra wide concrete girder and steel nose girder adapter section, guaranteed the safety of joint portion in the whole pushing tow process.This concrete beam pushing tow is with constructing the welding WELDING STUDS that also on steel nose girder and concrete girder contact surface, gathers, setting up roof and floor transverse prestress muscle; Make full use of the material of structure self; Improved the force-bearing situation of concrete girder and steel nose girder adapter section in the incremental launching construction process greatly; Guarantee the crack resistance of pushing tow process concrete girder and steel nose girder joint portion, improved the security performance of incremental launching construction concrete girder.
Description of drawings
Fig. 1 is the sectional view of a kind of embodiment of the utility model;
Fig. 2 is the side cutaway view of a kind of embodiment of the utility model;
Fig. 3 is the top plan view of the utility model one embodiment.
Wherein, 1: the concrete girder end; 2: steel nose girder; 3: layer of concrete; 4: presstressed reinforcing steel; 5: the top board presstressed reinforcing steel; 6: the baseboard prestress muscle; 7: WELDING STUDS; 8: connector; 9: web.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail.Following examples are used to explain the utility model, but are not used for limiting the scope of the utility model.
Shown in Fig. 1-3; A kind of embodiment of the utility model, concrete girder is made up of top board, base plate and web, and top board is positioned at the top of base plate; Web is embedded with connector 8 in top board, base plate and the web 9 of concrete girder front end or rear end between top board and base plate.This concrete beam pushing tow comprises concrete girder end 1 and the connector that is connected steel nose girder 28 with nose girder joint portion structure; Said connector 8 is embedded in the concrete girder end 1; Be provided with presstressed reinforcing steel 4 in the top board of said concrete girder end 1, base plate and the web 9, connector 8 is connected on the steel nose girder 2 through welding or bolt.Connector 8 can be preferably steel plate for various suitable materials, and steel plate is embedded in top board, base plate and the web 9 of concrete girder end 1.The structure of the utility model directly anchors to concrete girder end 1 longitudinal prestressing muscle 4 own on the connector 8 that is connected with steel nose girder 2; Having strengthened steel nose girder 2 is connected with the integral body of concrete girder structure; Effectively improve the stress of ultra wide concrete girder and steel nose girder adapter section, guaranteed the safety of joint portion in the whole pushing tow process.
In order further to strengthen the combination of concrete girder end 1 and steel nose girder 2; Preferably; Said connector 8 is fixedly connected on the concrete girder end 1 through WELDING STUDS 7; Connector 8 gathers with concrete girder end 1 contact surface side and welds WELDING STUDS 7, has strengthened concrete girder 1 and steel nose girder 2 combining on contact surface, has strengthened the bonding strength of steel plate and two kinds of materials of concrete.Preferably, the top board of said concrete girder end 1 is provided with horizontal top board presstressed reinforcing steel 5, and said base plate is provided with transverse bottom plate presstressed reinforcing steel 6.In concrete girder end 1 and steel nose girder 2 joint portion scopes, set up the transverse prestress muscle, make the concrete in this scope be in the three dimension stress state, concrete performance is improved greatly.Being configured in of the utility model is provided with horizontal presstressed reinforcing steel in top board and the base plate; When presstressed reinforcing steel is run into the steel plate of burying underground in top board and the base plate of concrete girder end 1; Transverse prestress muscle Durchgangshohle from steel plate is passed through, thereby firmly is arranged on top board and the base plate.
Consult Fig. 1 once more,, be filled with concrete between the top board of said concrete girder end 1 and the base plate, form layer of concrete 3 in order further to reduce the stress value of this structure.More preferably, the thickness of said layer of concrete 3 is 1/3～1/2 of concrete girder height.The adapter section that is configured in of the utility model is set up layer of concrete 3, and the volume of the stressed complex region of concrete girder end 1 and steel nose girder 2 adapter sections is strengthened, thereby has strengthened the intensity of joint portion.Also can strengthen the width of web 9, thereby wrap connector 8, the scope of increase can be set according to on-the-spot needs, and the width of the web 9 of general overgauge for example is 1.1～1.5 times of standard web width.
The application of a kind of embodiment on the high speed grade separation of the utility model: the concrete beam pushing tow according to foregoing description designs is constructed with the nose girder joint portion; By the bridge thrust beam segment length 212m that forms of this structure, pushing tow is apart from 213m, pushing tow maximum span 63m; The wide 35.5m of girder section; 25000 tons of pushing tow weight, the circular curve track, the single-point construction technology occupies present domestic first place on its large span, large-tonnage, long top journey, the complex curve.The concrete girder 1 of the utility model adopts above-mentioned corrective measure with the joint portion of steel nose girder 2; Make the joint portion withstand the test of practice of construction process; Structural safety is reliable in the whole pushing tow process, the crack do not occur, has proved the safe and feasible of this joint portion construction measure.
Can find out by above embodiment; The utility model embodiment is directly anchoring on the connector 8 that is connected with steel nose girder 2 through the longitudinal prestressing muscle with concrete girder end 1 itself; Having strengthened steel nose girder 2 is connected with the integral body of concrete girder structure; Effectively improve the stress of ultra wide concrete girder and steel nose girder adapter section, guaranteed the safety of joint portion in the whole pushing tow process.This structure also on steel nose girder and concrete girder contact surface, gather the welding WELDING STUDS, set up corrective measure such as roof and floor transverse prestress muscle; Make full use of the material of structure self; Improved the force-bearing situation of concrete girder and steel nose girder adapter section in the incremental launching construction process greatly; Guarantee the crack resistance of pushing tow process concrete girder and steel nose girder joint portion, improved the security performance of incremental launching construction concrete girder.
The above only is the preferred implementation of the utility model; Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model know-why, can also make some improvement and replacement, these improvement and replacement also should be regarded as the protection domain of the utility model.
Claims (8)
1. a concrete beam pushing tow is characterized in that with nose girder joint portion structure comprise concrete girder end and the connector that is connected steel nose girder, said connector is embedded in the concrete girder end, and said concrete girder is provided with presstressed reinforcing steel in the end.
2. structure as claimed in claim 1 is characterized in that said connector and steel nose girder link together through bolt.
3. structure as claimed in claim 1 is characterized in that said connector and steel nose girder weld together.
4. like any one described structure among the claim 1-3, it is characterized in that said concrete girder end comprises top board and base plate, said top board is positioned at the top of base plate, in said top board and base plate, is provided with the transverse prestress muscle.
5. structure as claimed in claim 4 is characterized in that said connector is made up of steel plate, and said steel plate is embedded in top board and the base plate, and said transverse prestress muscle passes the steel plate of burying underground on top board and the base plate.
6. structure as claimed in claim 4 is characterized in that, is filled with concrete between the top board of said concrete girder end and the base plate.
7. structure as claimed in claim 6 is characterized in that, the concrete thickness of filling between said top board and the base plate is 1/3～1/2 of a concrete girder height.
8. like any one described structure among the claim 1-3, it is characterized in that said connector is fixedly connected on the concrete girder end through WELDING STUDS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205599980U CN202509406U (en) | 2011-12-28 | 2011-12-28 | Guide beam combination part construction used for pushing concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205599980U CN202509406U (en) | 2011-12-28 | 2011-12-28 | Guide beam combination part construction used for pushing concrete beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202509406U true CN202509406U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205599980U Expired - Lifetime CN202509406U (en) | 2011-12-28 | 2011-12-28 | Guide beam combination part construction used for pushing concrete beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202509406U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914229A (en) * | 2019-04-17 | 2019-06-21 | 中建钢构有限公司 | A kind of connection structure and bridge |
-
2011
- 2011-12-28 CN CN2011205599980U patent/CN202509406U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914229A (en) * | 2019-04-17 | 2019-06-21 | 中建钢构有限公司 | A kind of connection structure and bridge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |
|
| CX01 | Expiry of patent term |