CN203821249U - Pushing reinforcement device - Google Patents
Pushing reinforcement device Download PDFInfo
- Publication number
- CN203821249U CN203821249U CN201420020775.0U CN201420020775U CN203821249U CN 203821249 U CN203821249 U CN 203821249U CN 201420020775 U CN201420020775 U CN 201420020775U CN 203821249 U CN203821249 U CN 203821249U
- Authority
- CN
- China
- Prior art keywords
- girder
- nose girder
- pushing tow
- nose
- bracing means
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a pushing reinforcement device, which is characterized in that back brace rod parts are arranged on the upper portion of a guide beam and a main beam. The pushing reinforcement device solves the problems that the guide beam is large in front end deflection during the pushing process and the main beam and the guide beam are too large in stress, and guarantees the guide beam to smoothly go through temporary piers in the biggest pusher span under the premise that the design difficulty of the guide beam and material input of the guide beam are not increased.
Description
Technical field
The utility model relates to a kind of pushing tow bracing means, relates in particular to a kind of pushing tow bracing means that includes back up.
Background technology
Incremental launching construction is, at the rear of abutment, construction plant is set, segmented casting beams body, and will build sections and completed beam body is linked to be integral body with longitudinal prestressing muscle, before beam body, installation length is that pushing tow is across the nose girder of 0.7 times of left and right, footpath, then by the level jack application of force, by beam body forwards pushing tow go out construction plant, repeat these operations and can complete whole beam body constructions.In bridge incremental launching construction process, nose girder is used to control pontic safety, because pushing tow cantilever moment of flexure can not be too large, and the internal force of construction stage and the internal force of operation phase can not differ too large, so pushing tow is only applicable to compared with multispan and is not more than the bridge type of 50m across footpath, when need adopt large span incremental launching construction, tend to cause because main beam rigidity is little work progress central sill body stress and amount of deflection to be difficult to reach and control the problems such as requirement, nose girder design difficulty is large, nose girder material input amount is large.
Summary of the invention
The utility model in prior art when need adopting large span incremental launching construction, tend to cause because main beam rigidity is little work progress central sill body stress and amount of deflection to be difficult to reach and control the problems such as requirement, nose girder design difficulty is large, nose girder material input amount is large, a kind of pushing tow bracing means is provided.
The technical scheme that the utility model technical solution problem adopts is:
A pushing tow bracing means, comprises nose girder and girder, on the top of nose girder and girder, is provided with back up.
Described back up is made by case beam reinforcement of rod pieces, comprises back up column, back up horizontal stroke and back up brace.
Described nose girder comprises two groups of nose girder main longitudinal griders, between described nose girder main longitudinal grider, by nose girder cross bar, connects, and between nose girder main longitudinal grider and nose girder cross bar, is provided with nose girder brace.
Described nose girder is variable cross-section I shape nose girder.
Described girder is steel girder.
Described nose girder is arranged on girder front end, and between described nose girder and girder, connected mode is welding or bolt, and the root edge of nose girder and girder bottom surface are positioned at same plane.
Described nose girder main longitudinal grider end is step-like.
Concrete technical scheme:
On top pushing platform, weld in advance assembled nose girder, nose girder is released to certain length from top pushing platform, and then, at nose girder rear portion welding girder, girder is generally steel girder, progressively, at nose girder and girder top welding back up rod member, finally form the pushing tow bracing means that nose girder and back up form.
Described back up adopts the good case beam reinforcement of rod pieces of stress performance to be made, comprise back up column, back up cross bar and back up brace, its Main Function is the rigidity that improves flexible girder, optimizes nose girder design length, effectively controls the distortion of beam body in pushing tow process.
Wherein pushing tow nose girder preferentially adopts variable cross-section I shape nose girder, by nose girder main longitudinal grider root (with girder junction), to end, reduced gradually, between two groups of nose girder main longitudinal griders, by truss-like nose girder cross bar, be connected to form integral body, between nose girder main longitudinal grider and nose girder cross bar, be provided with nose girder brace.For ease of nose girder, by Temporary Piers, two groups of nose girder main longitudinal grider ends of nose girder are designed to step-like, top lifting while being beneficial to Temporary Piers.Described nose girder is arranged on girder front end, adopt the mode of welding or book bolt to be connected with girder, its root edge should be positioned at same plane with girder bottom surface, its design directly affects stress and the amount of deflection of girder in pushing tow process, and himself is positive and negative stress alternation appearance in pushing tow process, therefore, the design of nose girder must be passed through strict checking computations, in pushing tow process, also should follow the tracks of and carry out stress and strain monitoring.
The utlity model has following technique effect:
The pushing tow bracing means that the utility model adopts nose girder and back up to form has solved that nose girder front end amount of deflection in pushing tow process is excessive, girder and the excessive problem of nose girder stress, do not increasing nose girder design difficulty greatly and under the prerequisite of nose girder material input amount, guaranteeing that nose girder can pass through smoothly Temporary Piers under maximum pushing tow span.
Accompanying drawing explanation
Fig. 1 is the construction schematic diagram that uses a kind of pushing tow bracing means being comprised of nose girder and back up to carry out the construction of bridge incremental launching method.
Fig. 2 is a kind of structural representation of the pushing tow bracing means being comprised of nose girder and back up.
Reference numeral:
1: nose girder main longitudinal grider; 2: nose girder cross bar; 3: nose girder brace; 4: nose girder vertical pole; 5: back up column; 6: back up cross bar; 7: back up brace; 8: girder; 9: top pushing platform; 10: Temporary Piers;
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
On top pushing platform 9, weld in advance assembled nose girder, nose girder is released to certain length from top pushing platform 9, then at nose girder rear portion welding girder 8, progressively, at nose girder and girder 8 top welding back ups, finally form the pushing tow bracing means that nose girder and back up form.
Above-mentioned girder 8 comprises the truss between two groups of edge-beams and girder, between two groups of edge-beams, by setting truss, reinforces, and described girder generally adopts steel work,
Described back up adopts the good case beam reinforcement of rod pieces of stress performance to be made, comprise back up column 5, back up cross bar 6 and back up brace 7, its Main Function is the rigidity that improves flexible girder, optimizes nose girder design length, effectively controls the distortion of beam body in pushing tow process.
Wherein pushing tow nose girder preferentially adopts variable cross-section I shape nose girder, root (with girder 8 junctions) by nose girder main longitudinal grider 1 reduces gradually to end, two groups of 1 of nose girder main longitudinal griders are connected to form integral body by truss-like nose girder cross bar 2, between nose girder main longitudinal grider 1 and nose girder cross bar 2, are provided with nose girder brace 3.For ease of nose girder, by Temporary Piers 10, two groups of nose girder main longitudinal grider 1 ends of nose girder are designed to step-like, are beneficial to by Temporary Piers 10 top liftings.Described nose girder is arranged on girder 8 front ends, adopt the mode of welding or bolt to be connected with girder 8, its root edge should be positioned at same plane with girder 8 bottom surfaces, its design directly affects stress and the amount of deflection of girder 8 in pushing tow process, and himself is positive and negative stress alternation appearance in pushing tow process, therefore, the design of nose girder must be passed through strict checking computations, in pushing tow process, also should follow the tracks of and carry out stress and strain monitoring.
Below in conjunction with Specific construction process, the pushing tow bracing means of described nose girder and back up composition is described: assembled nose girder on top pushing platform 9, first by nose girder main longitudinal grider 1 welding on top pushing platform, after by nose girder cross bar 2, nose girder brace 3 and 4 weldings of nose girder vertical pole, by nose girder cross bar 2, nose girder brace 3, nose girder vertical pole 4, the left and right width nose girder main longitudinal grider 1 of nose girder is connected into integral body, for guaranteeing that girder 8 has the space of welding, nose girder pushing tow is gone out to top pushing platform 9 parts (needing to guarantee that nose girder can not topple), then at nose girder rear end welding girder 8.Girder 8 and nose girder are welded into after integral body, start welded truss back up piecemeal, first back up column 5 are soldered on girder 8, then weld two back up cross bars 6 between back up column 5, finally weld back up brace 7.When back up is mounted to girder 8 end, carry out girder 8 pushing tows, make girder 8 length can meet back up further part and install, finally complete the installation of back up, as shown in Figure 1.
The pushing tow bracing means that the utility model adopts nose girder and back up to form has solved that nose girder front end amount of deflection in pushing tow process is excessive, girder and the excessive problem of nose girder stress, do not increasing nose girder design difficulty greatly and under the prerequisite of nose girder material input amount, guaranteeing that nose girder can pass through smoothly Temporary Piers under maximum pushing tow span.
Certainly the foregoing is only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All any modifications of doing, be equal to replacement, improvement etc. within spirit of the present utility model and principle, be all included in protection domain of the present utility model.
Claims (7)
1. a pushing tow bracing means, comprises nose girder and girder (8), it is characterized in that: the top at nose girder and girder (8) is provided with back up.
2. pushing tow bracing means according to claim 1, is characterized in that: described back up is made by case beam reinforcement of rod pieces, comprises back up column (5), back up cross bar (6) and back up brace (7).
3. pushing tow bracing means according to claim 1, it is characterized in that: described nose girder comprises two groups of nose girder main longitudinal griders (1), between described nose girder main longitudinal grider (1), by nose girder cross bar (2), connect, between nose girder main longitudinal grider (1) and nose girder cross bar (2), be provided with nose girder brace (3).
4. pushing tow bracing means according to claim 1, is characterized in that: described nose girder is variable cross-section I shape nose girder.
5. pushing tow bracing means according to claim 1, is characterized in that: described girder (8) is steel girder.
6. pushing tow bracing means according to claim 1, it is characterized in that: described nose girder is arranged on girder (8) front end, between described nose girder and girder (8), connected mode is welding or bolt, and the root edge of nose girder and girder (8) bottom surface is positioned at same plane.
7. pushing tow bracing means according to claim 3, is characterized in that: described nose girder main longitudinal grider (1) end is step-like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420020775.0U CN203821249U (en) | 2014-01-14 | 2014-01-14 | Pushing reinforcement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420020775.0U CN203821249U (en) | 2014-01-14 | 2014-01-14 | Pushing reinforcement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203821249U true CN203821249U (en) | 2014-09-10 |
Family
ID=51476766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420020775.0U Expired - Fee Related CN203821249U (en) | 2014-01-14 | 2014-01-14 | Pushing reinforcement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203821249U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929055A (en) * | 2015-06-17 | 2015-09-23 | 中建钢构有限公司 | Auxiliary moving device and method for pushing construction of bridge |
| CN108149587A (en) * | 2017-11-23 | 2018-06-12 | 湖北华舟重工应急装备股份有限公司 | A kind of modularization bridge erecting device |
-
2014
- 2014-01-14 CN CN201420020775.0U patent/CN203821249U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929055A (en) * | 2015-06-17 | 2015-09-23 | 中建钢构有限公司 | Auxiliary moving device and method for pushing construction of bridge |
| CN108149587A (en) * | 2017-11-23 | 2018-06-12 | 湖北华舟重工应急装备股份有限公司 | A kind of modularization bridge erecting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101446069A (en) | Multi-node integral installation method for steel truss beam | |
| CN203821249U (en) | Pushing reinforcement device | |
| CN202007535U (en) | Supporting reinforcing structure | |
| CN103362074B (en) | Bridge cantilever box girder construction hanging basket pre-pressing loading device | |
| CN201459732U (en) | Simple support guide device for pile casing sinking | |
| CN208605187U (en) | A kind of shield machine is secondary to originate tunneling construction reaction frame | |
| CN107190993A (en) | The preassembling moulding bed and its assembling method of large span inverted trapezoidal truss | |
| CN207974016U (en) | A kind of steel truss pushing tow support system | |
| CN207498835U (en) | Needle beam combined steel plate beam bridge panel cast-in-place construction sliding form frame system | |
| CN204738233U (en) | Assembled frame scaffold | |
| CN205242238U (en) | Be applied to self anchored suspension bridge's main girder structure | |
| CN203834366U (en) | Energy-saving universal hanging basket for bridge construction | |
| CN204151695U (en) | Be applicable to the combination Hanging Basket system of continuous rigid frame bridge or the full beam section construction of continuous girder bridge | |
| CN207974557U (en) | A kind of concrete hanging top lengthening connection structure | |
| CN204386608U (en) | A kind of tunnel invert construction tool | |
| CN205295915U (en) | Wave form steel web nose girder | |
| CN113073574A (en) | Guide beam mounting structure and method for steel box girder pushing construction | |
| CN207974021U (en) | A kind of twin legged thin wall pier I-steel bolster convenient for removing | |
| CN208615041U (en) | A kind of prefabricated case beam door rebar positioning bogie | |
| CN203514749U (en) | High-intensity scaffold | |
| CN211665583U (en) | A cutting ferrule formula limit structure for installation of steel case roof beam support method | |
| CN106592431A (en) | Construction method for assisting guiding girder type 900-ton bridge girder erection machine to pass girder lifting arch in high position | |
| CN202848875U (en) | Portal crane main beam structure | |
| CN202164547U (en) | Bracket system for concrete pouring of bridge contact network platform | |
| CN208087088U (en) | A kind of tower crane attached wall joint reinforcing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20200114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |