CN203530864U - Large-span concrete continuous beam bridge side span folding device - Google Patents
Large-span concrete continuous beam bridge side span folding device Download PDFInfo
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- CN203530864U CN203530864U CN201320674192.5U CN201320674192U CN203530864U CN 203530864 U CN203530864 U CN 203530864U CN 201320674192 U CN201320674192 U CN 201320674192U CN 203530864 U CN203530864 U CN 203530864U
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- hanging basket
- brace
- rod
- end bay
- inclined rod
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Abstract
A large-span concrete continuous beam bridge side span folding device comprises two hanging basket trusses. The hanging basket trusses are connected through a hanging basket gantry. The large-span concrete continuous beam bridge side span folding device is characterized in that a facade of every hanging basket truss comprises a lower chord rod, a rear inclined rod, a vertical rod, an upper front inclined rod and a lower front inclined rod, wherein the lower chord rod, the rear inclined rod, the upper front inclined rod and the lower front inclined rod are connected through node plates. Connecting nodes of the lower chord rod, the lower front inclined rod and the vertical rod are central fulcrums, nodes of the lower chord rod and the rear inclined rod are rear fulcrums, hanging baskets at the positions of the central fulcrums and the rear fulcrums are anchored on concrete cantilever beam surfaces respectively through anchor supports, the central fulcrums are close to the front ends of cantilevers, connecting nodes of the upper front inclined rod and the lower front inclined rod are front fulcrums, and folding supporting rods are fixed on side blocks and support the front fulcrums of the hanging baskets. According to a concrete continuous beam bridge side span folding process and device, front hanging points for supporting the bridge floor hanging baskets on the side blocks are utilized to form a continuous beam side span stabilizing vertical constraint system, and compared with a currently frequently used method of adopting full framing to construct a side span folding section, the process and the device solve the problem that an existing side span support folding construction process is complex, long in cycle and high in cost and has adjusting operation difficulty.
Description
Technical field
The utility model belongs to technical field of civil engineering, relates to the construction technology of the concrete continuous girder bridge of large span, is specifically related to a kind of device closing up for the end bay of concrete continuous girder bridge.
Background technology
Concrete continuous girder bridge is a kind of primary structure form of Longspan Bridge, generally adopts segmentation cantilever-construction to construct.When constructing to end bay after maximum two boom segments, generally adopt the closure segment of full framing method construction end bay.Afterwards, adopt Hanging Basket centering to close up across beam section, thereby finally complete the construction of the whole superstructures of bridge.
The end bay of large-span concrete continuous girder bridge closes up: closure segment full framing should have that sedimentation deformation in enough rigidity, closure segment casting process is the least possible, the suffered displacement disturbance of closure segment concrete, site operation supporting structure is simple and good economy performance etc.Yet, the end bay closure construction method more complicated in Practical Project: the rack construction cycle is long, cost is high and have the larger problems such as potential safety hazard.Conventionally, for the shorter continuous beam end bay of pier height, it closes up support and adopts full hall scaffold, utilizes fastener to set up to meet the support of design altitude.But the vertical rigidity of the type support is lower, casting process medium-height trestle settling amount is larger, and bed die absolute altitude adjustment difficulty, therefore can affect construction quality and the geometricshape of bridge.For the larger continuous beam of the main pier height of end bay, generally need to adopt Large-diameter Steel tubing string and shaped steel to build full framing.Such support element bearing capacity is high, but the size of member is larger, and the difficulty of building construction is also larger, and financial cost is also higher.In addition, the support that closes up of above-mentioned two types control to require very highly to foundation settlement, at support, set up as last and need ground under support to carry out foundation replacement, compacting or foundation construction, and this also can increase complexity and the expense of construction greatly.
Utility model content
For the problem such as solve existing end bay support closure construction complex process, the cycle is long, cost is high, adjusting operation is difficult, the utility model proposes a kind of end bay closing device of large-span concrete continuous girder bridge.
For achieving the above object, the technical solution of the utility model is: large-span concrete continuous girder bridge end bay closing device, comprise two Pin Hanging Basket truss, between Pin, adopt Hanging Basket door frame to connect, it is characterized in that, the facade of every Pin Hanging Basket truss forms and comprises lower chord, rear brace, montant, front upper brace and front lower brace, lower chord, rear brace, front upper brace is connected by gusset plate with front lower brace, lower chord, the connected node of front lower brace and montant is central bearing point, the node of lower chord and rear brace is rear fulcrum, Hanging Basket is anchored at by anchor chair respectively on concrete cantilever beam face at central bearing point and rear fulcrum place, wherein central bearing point is near cantilever front end, the connected node of front upper brace and front lower brace is front fulcrum, close up the front fulcrum that strut is fixed on abutment pier and supports Hanging Basket.
Further, above-mentioned central bearing point is anchored in continuous beam end bay cantilever end carriage face place, and rear fulcrum is pressurized anchorage bearing.
Further, each rod member of hanging basket main truss forms by connecting batten plate between two groups of positioned opposite channel-section steels and channel-section steel.
Further, Hanging Basket central bearing point place arranges shoulder pole girder, many group ground tackles is set on shoulder pole girder at vertical anchoring central bearing point.
Further, above-mentioned shoulder pole girder comprises two groups of channel-section steels that arrange dorsad and the connection batten plate between channel-section steel.
Further, above-mentioned bearing is soldering group mould assembling tee section.
The beneficial effects of the utility model: concrete continuous girder bridge end bay of the present utility model closes up technique and installs by utilizing the front suspension centre of abutment pier upper support bridge floor Hanging Basket, form the stable vertical constraint system of continuous beam end bay, than the closure segment of at present conventional employing full framing method construction end bay, the problem such as successfully solved existing end bay support closure construction complex process, the cycle is long, cost is high, adjusting operation is difficult.
Accompanying drawing explanation
Fig. 1 is the beam bridge folding structure schematic diagram that the utility model relates to;
Fig. 2 is end bay closing device structural representation of the present utility model;
Fig. 3 is the right view of end bay closing device shown in Fig. 2;
Fig. 4 is the main couple cross section structure schematic diagram of the utility model end bay closing device;
Fig. 5 is the shoulder pole girder cross section structure schematic diagram of the utility model end bay closing device.
Description of reference numerals: cantilever 1, span centre closure segment 2, end bay closure segment 3, main pier 4, abutment pier 5, Hanging Basket 6, close up strut 7, lower chord 11, rear brace 12, montant 13, front lower brace 14, front upper brace 15, rear fulcrum gusset plate 21, in upper fulcrum gusset plate 22, middle lower fulcrum gusset plate 23, front suspension centre gusset plate 24, bed die system 31, closes up strut 41, anchor tie 51, anchor chair 61, shoulder pole girder 71, shoulder pole girder channel-section steel 711, shoulder pole girder connects sews bar 712, ground tackle 72, main couple connects sews bar 81, main couple channel-section steel 82.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Be illustrated in figure 1 the related large-span concrete continuous girder bridge structure of the utility model, wherein main pier 4 and abutment pier 5 build cantilever 1 after casting, cantilever 1 closure segment between main pier 4 is span centre closure segment 2, cantilever 1 is end bay closure segment 3 to the closure segment of abutment pier 5, and the main difference point of the end bay closing device in the present embodiment is that Hanging Basket 6 is supported by the strut 7 that closes up on abutment pier also.
The frame closing device of the present embodiment as shown in Figures 2 and 3, comprise two Pin Hanging Baskets, between Pin, adopt Hanging Basket door frame to connect, the facade of every Pin structure forms and comprises lower chord 11, rear brace 12, montant 13, front lower brace 14 and front upper brace 15, lower chord, rear brace, the end to end composition quadrangle of front upper brace and front lower brace, between the node of the node of rear brace and front upper brace and lower chord and front lower brace, be connected montant, lower chord respectively with front lower brace, during the node that rear brace connects is Hanging Basket, rear fulcrum, Hanging Basket in, rear fulcrum place is fixed to cantilever 1 front end by anchor chair 61, wherein central bearing point is near cantilever front end, near the edge of cantilever, after corresponding rear fulcrum leans on.The connected node of front upper brace and front lower brace is front fulcrum, and front fulcrum extends forward for lifting bed die system, closes up the front fulcrum that strut 41 is fixed on abutment pier and supports Hanging Basket.
Between lower chord 11, rear brace 12, montant 13, front lower brace 14 and front upper brace 15, by node junction plate, link together, be respectively rear fulcrum gusset plate 21, in upper fulcrum gusset plate 22, middle lower fulcrum gusset plate 23, front suspension centre gusset plate 24.Above-mentioned central bearing point is anchored on cantilever, and rear fulcrum pressurized supports.After fixing, lower chord 11 is parallel to cantilever surface.
Be illustrated in figure 4 the preferred embodiment of hanging basket main truss, described main couple comprises that two groups of main couple channel-section steels 82 that are oppositely arranged and the main couple between channel-section steel connect and sews bar 81.Hanging Basket central bearing point place arranges shoulder pole girder, many group ground tackles is set on shoulder pole girder for anchoring central bearing point.Figure 5 shows that the preferred structure schematic diagram of shoulder pole girder, comprise that two groups of shoulder pole girder channel-section steels 711 that arrange dorsad and the shoulder pole girder between channel-section steel connect and sew bar 712.When fixing Hanging Basket, anchor tie 51 is anchored on shoulder pole girder by ground tackle 72 through shoulder pole girder.In addition, above-mentioned bearing is preferably three casees cross sections of Plate Welding.
A kind ofly according to above-mentioned end bay closing device, carry out the method that concrete beam bridge end bay closes up and realize in the following manner:
A, reach Hanging Basket are to cantilever front end;
B, at Hanging Basket central bearing point place, with anchor tie, Hanging Basket is anchored to bridge cantilever end place;
C, smooth Hanging Basket rear fulcrum place concrete beam face, arrange fulcrum bearing;
D, at abutment pier top, arrange and to close up strut, close up strut vertical supporting Hanging Basket front fulcrum, between two Pin struts, laterally establish one scissors strut and connect;
E, at the bottom of cantilever end carriage and between abutment pier, setting up beam section bed die system 31, colligation closure segment reinforcing bar, and build closure segment concrete.
For realizing the purpose of this utility model, major technique thought of the present utility model is to utilize the front suspension centre of abutment pier upper support bridge floor Hanging Basket, form the stable vertical constraint system of continuous beam end bay, guarantee, in end bay closure segment casting process, excessive sedimentation and engineering construction quality do not occur.Concrete technical scheme is before end bay closure segment is built, and cantilever construction hanging basket advancing, to continuous beam end bay cantilever end, and is established to shaped steel montant on abutment pier, supports the front suspension centre of Hanging Basket.Meanwhile, at the front fulcrum place of Hanging Basket, finish rolling deformed bar is set, together with front fulcrum is closely connected with end bay beam face.In addition, Hanging Basket rear fulcrum place arranges pressurized and supports, and assurance rear fulcrum and beam face are combined closely.Twice shoulder pole girder is established along bridge lateral, the vertical anchor pole of stretch-draw between shoulder pole girder and concrete box girder in central bearing point top.
Preferably, the chord member of the middle main couple of the present embodiment, montant, brace all adopt Two bors d's oeuveres channel cross-section, comprise the first channel-section steel and the second channel-section steel, and the first channel-section steel and the second channel-section steel opening are arranged in opposite directions, also comprise that bar is sewed in the connection between channel-section steel.Shoulder pole girder adopts Two bors d's oeuveres channel cross-section, also comprises the first channel-section steel and the second channel-section steel, and the first channel-section steel and the second channel-section steel opening opposed, also comprise that bar is sewed in the connection between channel-section steel, and the connection that is positioned at channel-section steel two ends is sewed on bar and had anchor hole, for the anchoring of coupling assembling.Described fulcrum bearing adopts three casees cross sections of Plate Welding.
In shoulder pole girder in the above-described embodiments, the connection that is positioned at shoulder pole girder channel-section steel two ends is sewed on bar 712 and is had anchor hole, for the anchoring of coupling assembling.In order to reduce the difficulty of perforate, certain gap can when splicing, channel-section steel be reserved, so that the finish rolling deformed bar pull bar (anchor tie) of coupling assembling passes between two blocks of channel-section steels.The size in gap is also because the diameter of the finish rolling deformed bar pull bar for being connected and fixed is determined.
The concrete continuous girder bridge end bay closing device of above embodiment and method, by adopting Hanging Basket oppositely to support, have solved existing concrete continuous girder bridge end bay and have closed up the problems such as support erection construction is complicated, adjustment is difficult, cost is high, poor stability.Hanging Basket stress with respect to during Cantilever Construction, when end bay closes up, front suspension centre by set steel column on abutment pier at vertical supporting Hanging Basket, simultaneously, at Hanging Basket front fulcrum place, arrange that fining twisted steel is vertically being anchored at Hanging Basket on cantilever end carriage face, after Hanging Basket, anchor point place is by pressurized shaped steel cushion block is set, thereby makes end bay form the larger system of rigidity, and excessive vertical deflection does not occur while guaranteeing closure segment construction.The advantages such as that this folding method has is simple in structure, easy to operate, good economy performance, the efficiency of construction that can greatly provide large span continuous beam end bay to close up.
The foregoing is only the specific embodiment of the present utility model, one skilled in the art will appreciate that in the disclosed technical scope of the utility model, can carry out various modifications, replacement and change to the utility model.Therefore the utility model should not limited by above-mentioned example, and should limit with the protection domain of claims.
Claims (6)
1. large-span concrete continuous girder bridge end bay closing device, comprise two Pin Hanging Basket truss, between Pin, adopt Hanging Basket door frame to connect, it is characterized in that, the facade of every Pin Hanging Basket truss forms and comprises lower chord, rear brace, montant, front upper brace and front lower brace, lower chord, rear brace, front upper brace is connected by gusset plate with front lower brace, lower chord, the connected node of front lower brace and montant is central bearing point, the node of lower chord and rear brace is rear fulcrum, Hanging Basket is anchored at by anchor chair respectively on concrete cantilever beam face at central bearing point and rear fulcrum place, wherein central bearing point is near cantilever front end, the connected node of front upper brace and front lower brace is front fulcrum, close up the front fulcrum that strut is fixed on abutment pier and supports Hanging Basket.
2. end bay closing device according to claim 1, is characterized in that, central bearing point is anchored in continuous beam end bay cantilever end carriage face place, and rear fulcrum is pressurized anchorage bearing.
3. end bay closing device according to claim 1 and 2, is characterized in that, each rod member of hanging basket main truss forms by connecting batten plate between two groups of positioned opposite channel-section steels and channel-section steel.
4. end bay closing device according to claim 3, is characterized in that, Hanging Basket central bearing point place arranges shoulder pole girder, many group ground tackles is set on shoulder pole girder at vertical anchoring central bearing point.
5. end bay closing device according to claim 4, is characterized in that, shoulder pole girder comprises two groups of channel-section steels that arrange dorsad and the connection batten plate between channel-section steel.
6. end bay closing device according to claim 1, is characterized in that, bearing is soldering group mould assembling tee section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674192.5U CN203530864U (en) | 2013-10-29 | 2013-10-29 | Large-span concrete continuous beam bridge side span folding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674192.5U CN203530864U (en) | 2013-10-29 | 2013-10-29 | Large-span concrete continuous beam bridge side span folding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203530864U true CN203530864U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320674192.5U Withdrawn - After Issue CN203530864U (en) | 2013-10-29 | 2013-10-29 | Large-span concrete continuous beam bridge side span folding device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572708A (en) * | 2013-10-29 | 2014-02-12 | 西南交通大学 | Large-span concrete continuous girder bridge side span folding device and method |
| CN104088226A (en) * | 2014-07-20 | 2014-10-08 | 华巧波 | Vertical column |
| CN104099877A (en) * | 2014-07-20 | 2014-10-15 | 华巧波 | Connecting bar |
-
2013
- 2013-10-29 CN CN201320674192.5U patent/CN203530864U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572708A (en) * | 2013-10-29 | 2014-02-12 | 西南交通大学 | Large-span concrete continuous girder bridge side span folding device and method |
| CN103572708B (en) * | 2013-10-29 | 2015-06-03 | 西南交通大学 | Large-span concrete continuous girder bridge side span folding device and method |
| CN104088226A (en) * | 2014-07-20 | 2014-10-08 | 华巧波 | Vertical column |
| CN104099877A (en) * | 2014-07-20 | 2014-10-15 | 华巧波 | Connecting bar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140409 Effective date of abandoning: 20150603 |
|
| RGAV | Abandon patent right to avoid regrant |