CN204570501U - A kind of existing Hollow Slab Beam Bridge seat empty reinforcing construction - Google Patents
A kind of existing Hollow Slab Beam Bridge seat empty reinforcing construction Download PDFInfo
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- CN204570501U CN204570501U CN201520054952.1U CN201520054952U CN204570501U CN 204570501 U CN204570501 U CN 204570501U CN 201520054952 U CN201520054952 U CN 201520054952U CN 204570501 U CN204570501 U CN 204570501U
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- hollowcore slab
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Abstract
The utility model discloses a kind of existing Hollow Slab Beam Bridge seat empty reinforcing construction that plate-girder is made up of polylith hollowcore slab, first by the concrete chisel removal of the bridge floor in-situ layer of beam-ends, hinge seam and hollowcore slab top board, then the bridge floor in-situ layer after concrete, hinge seam and hollow part, hollowcore slab end is cut with steel fibrous concrete primary concreting, form end floor beam, and prestressed reinforcement is set in end floor beam, each beam-ends is by two bearing supports.Hollow Slab Beam Bridge beam end support system after reinforcing changes static determinacy architecture into by multiple indeterminate architecture, and Bearing Seat Force is clear and definite, and two bearings can participate in stressed, and seat empty problem is fundamentally resolved; The integral rigidity of hollowcore slab improves, stress equalization, and hinge is sewn on beam-ends local stress and reduces, and hinge seam is not easily damaged, avoids single slab bearing phenomenon to occur, and effectively ensures the application life of bridge.
Description
Technical field
The utility model relates to highway bridge, is specially a kind of existing Hollow Slab Beam Bridge seat empty reinforcing construction.
Background technology
Hollow Slab Beam Bridge is one of little form of structure the most frequently used across footpath bridge 10 ~ 20m, most based on simply supported beam, be applicable to batch production batch production, fabricated construction, its section is made up of polylith hollowcore slab, arranges hinge seam between plate, after hollowcore slab erection, after hinge seam is built in the lump with bridge floor in-situ layer concrete, polylith hollowcore slab, hinge seam and bridge floor in-situ layer form an entirety, bear the loads such as automobile.
But, often there is the disease of seat empty in existing Hollow Slab Beam Bridge, main cause has: 1, monolithic hollowcore slab supports by 4 neoprene bearings, every bridge beam is made up of polylith hollowcore slab, defines and often there is tens the even stress system of tens neoprene bearings vertical supporting loads simultaneously across hollowbeam.The wide Bridge Sections of such as 12m is made up of 9 pieces of hollowcore slabs, and each beam-ends neoprene bearing reaches 18.Multi-supports can form stressed indefinite statically indeterminate system, usually occurs the situation of unbalance stress; 2, prestressing force or concrete shrinkage and creep effect have upturned trend to 4 corners, make side bar that seat empty phenomenon easily occur; 3, construction is difficult to guarantee tens neoprene bearings and reaches design elevation simultaneously, often just occurs that Bearing Seat Force is irregular when construction completes, even comes to nothing.
Seat empty will make hinge seam stress between hollowcore slab sharply increase, and cause hinge seam to destroy, and then will cause the generation of hollowcore slab " single slab bearing " and further disease, cause reduce the application life of bridge and even damage.At present, basic solution be there is no for seat empty, when there is seat empty, the method for replacing time can only be adopted to solve temporarily.
Utility model content
The purpose of this utility model is to provide a kind of existing Hollow Slab Beam Bridge seat empty reinforcing construction, destroys effectively to solve existing multi-supports Hollow Slab Beam Bridge and then causes single slab bearing to damage the problem of bridge because seat empty causes cutting with scissors seam.
The existing Hollow Slab Beam Bridge seat empty reinforcing construction that the utility model provides, comprises the hollowcore slab that polylith is existing; Hinged seam between hollowcore slab; What hollowcore slab and hinge were stitched is bridge floor in-situ layer above; The two ends of the described hollowcore slab end floor beam that formed of concreting separately after having the concrete in the bridge floor in-situ layer by cutting hollowbeam, hinge seam and hollowcore slab top board; In end floor beam, have bellows, be installed with prestressed reinforcement in bellows, the two ends of prestressed reinforcement are anchored at the end of end floor beam by anchor device; The bottom of end floor beam is by two bearing supports.
Described end floor beam is along the height of the longitudinal direction width of bridge to be 0.8 ~ 1.2H, H be hollowcore slab.
Described bearing selects vertical bearing capacity to meet the pot bearing of Hollow Slab Beam Bridge carrying tonnage demand.
Described concrete of building end floor beam is steel fibrous concrete, and wherein the volume content of steel fibre is 1% ~ 3.5% of total volume of concrete.
The construction method of above-mentioned existing Hollow Slab Beam Bridge seat empty reinforcing construction, comprises the step of following order:
Concrete in step one, the bridge floor in-situ layer cutting existing Hollow Slab Beam Bridge beam-ends, hinge seam and the top board of hollowcore slab, the height of the longitudinal direction along bridge cuts width to be 0.8 ~ 1.2H, H be hollowcore slab; Duct is offered in the two side of the end of the hollowcore slab after cutting top board;
Step 2, with the external diameter bellows more smaller than aperture, above-mentioned duct through each duct, then in bellows, cross prestressed reinforcement;
Brushing Chemical Felter inside and outside step 3, hollowcore slab end after cutting concrete roof and on upper face;
The cavity end of step 4, hollowcore slab after cutting concrete roof arranges baffle plate, flows into hollowcore slab cavity for preventing from building concrete in end floor beam Concrete; Then cut the hollow part, end after top board, hinge seam and bridge floor in-situ layer with once-pouring of concrete hollowcore slab, form end floor beam; After the concrete strength of end floor beam reaches requirement, transverse stretching prestressed reinforcement (can both-end or one-end tension), cement injection mortar in the gap of prestressed reinforcement and bellows, then utilizes anchor device that the two ends of prestressed reinforcement are anchored at the both ends of end floor beam;
Step 5, utilize jack by end floor beam jack-up, original neoprene bearing is removed one by one; Then place two with the two ends of end floor beam for reference symmetry and replace the bearing of original neoprene bearings; Then unload jack, end floor beam is fallen, be seated on bearing, complete the construction of existing Hollow Slab Beam Bridge seat empty reinforcing construction.
The inner hole section area of the bellows in described step 2 is 2 ~ 4 times of prestressed reinforcement section area, filling concrete mortar in the gap of bellows and prestressed reinforcement.
Chemical Felter in described step 3 is epoxy resin.
Compared with prior art, the beneficial effects of the utility model are:
1, the bridge floor in-situ layer after the utility model steel fibrous concrete primary concreting cuts concrete, hinge are stitched and hollow part, hollowcore slab end, form end floor beam, and prestressed reinforcement is set in end floor beam, effectively can improve the integral rigidity of hollowcore slab, make hollowcore slab stress equalization, greatly reduce single slab bearing phenomenon, hinge is sewn on beam-ends local stress and reduces, hinge seam is not easily damaged, effectively prevents single slab bearing disease from occurring.
2, each beam-ends only arranges two bearings, every bridge beam changes into four bearing supports by original tens bearing supports, beam end support stress system is static determinacy system by multiple indeterminate system transition, Bearing Seat Force is clear and definite, each bearing can participate in stressed, and seat empty problem is fundamentally resolved.
3, the utility model site operation is easy, and maintenance load and the maintenance costs of later stage operation hollow core board support reduce greatly.
Accompanying drawing explanation
Accompanying drawing provides the schematic diagram of the utility model embodiment.
Fig. 1 is the profile of existing hollowcore slab;
Fig. 2 (a) is the schematic diagram of step one in construction method; Fig. 2 (b) is the schematic diagram of step 2 in construction method; Fig. 2 (c) is step 3 in construction method, the schematic diagram of four; Fig. 2 (d) is the transverse cross-sectional view of the Hollow Slab Beam Bridge end floor beam after reinforcing;
Fig. 3 is A-A sectional drawing in Fig. 2 (d).
In figure: 1-hollowcore slab, 1-1-baffle plate, 1-2-duct, 2-hinge seam, 3-bridge floor in-situ layer, 4-end floor beam, 5-Chemical Felter, 6-bellows, 7-prestressed reinforcement, 8-anchor device, 9-neoprene bearing, 10-bearing.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
The present embodiment is for reinforcing forming existing Hollow Slab Beam Bridge by six pieces of hollowcore slabs 1 shown in Fig. 1.Hollowcore slab 1 length, width and height of this bridge are of a size of (1296 ╳ 124 ╳ 75) mm, and have the hinge seam 2 of concreting between hollowcore slab, hollowcore slab top is concrete bridge deck in-situ layer 3.
As shown in Figure 2, first cut the concrete of the bridge floor in-situ layer 3 of beam end, hinge seam 2 and hollowcore slab 1 top board, it is 75cm that the longitudinal direction along bridge cuts width; Two duct 1-2 that aperture is 8.5cm are offered on the two side of the end of the hollowcore slab 1 after cutting concrete is vertical.Then with external diameter be 8.4cm, internal diameter is that the plastic film capicitor 6 of 8.0cm is through each duct 1-2; Then in bellows 6, cross sectional area is 1490mm
2prestressed reinforcement 7; Then inside and outside hollowcore slab 1 end after cutting concrete roof and upper face on brushwork epoxy resin as chemical bonding agent 5; The cavity end of the hollowcore slab then after cutting concrete roof arranges the baffle plate 1-1 be made up of plank, flows into hollowcore slab cavity for preventing from building concrete in end floor beam Concrete; Then cut the hollow part, end after top board, hinge seam 2 and bridge floor in-situ layer 3 with steel fibrous concrete primary concreting hollowcore slab 1, form end floor beam 4; After the concrete strength of end floor beam 4 reaches requirement, two ends transverse stretching prestressed reinforcement 7, cement injection mortar in the gap of prestressed reinforcement 7 and bellows 6, then select YJM15-12 circular clamp anchor to do both ends that the two ends of prestressed reinforcement 7 are anchored at end floor beam 4 by anchor device 8; After the concrete strength of end floor beam reaches requirement, utilize jack by end floor beam jack-up, original neoprene bearing 9 is removed one by one; Then with the two ends of end floor beam be benchmark, mutual spacing 420cm symmetry place two bearings 10, replace original neoprene bearing 9 with it; Then by lifting jack unloading, end floor beam is fallen, be seated on two bearings 10.Respectively across hollowcore slab after as above transformation, namely complete existing Hollow Slab Beam Bridge seat empty and reinforce all constructions.
Claims (3)
1. an existing Hollow Slab Beam Bridge seat empty reinforcing construction, comprises the existing hollowcore slab of polylith (1); The hinge of concreting is had to stitch (2) between hollowcore slab (1); Hollowcore slab (1) and hinge seam (2) above have concrete bridge deck in-situ layer (3); It is characterized in that, the two ends of the described hollowcore slab end floor beam (4) that formed of concreting separately after having the concrete in the bridge floor in-situ layer (3) by cutting hollowbeam, hinge seam (2) and hollowcore slab (1) top board; Prestressed reinforcement (7) is had in end floor beam (4); The bottom of end floor beam is supported by two bearings (10).
2. existing Hollow Slab Beam Bridge seat empty reinforcing construction according to claim 1, is characterized in that, described end floor beam (4) is along the height of the longitudinal direction width of bridge to be 0.8 ~ 1.2H, H be hollowcore slab (1).
3. existing Hollow Slab Beam Bridge seat empty reinforcing construction according to claim 1, is characterized in that, described bearing (10) selects vertical bearing capacity to meet the pot bearing of Hollow Slab Beam Bridge carrying tonnage demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520054952.1U CN204570501U (en) | 2015-01-27 | 2015-01-27 | A kind of existing Hollow Slab Beam Bridge seat empty reinforcing construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520054952.1U CN204570501U (en) | 2015-01-27 | 2015-01-27 | A kind of existing Hollow Slab Beam Bridge seat empty reinforcing construction |
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| Publication Number | Publication Date |
|---|---|
| CN204570501U true CN204570501U (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520054952.1U Expired - Fee Related CN204570501U (en) | 2015-01-27 | 2015-01-27 | A kind of existing Hollow Slab Beam Bridge seat empty reinforcing construction |
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| CN (1) | CN204570501U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594211A (en) * | 2015-01-27 | 2015-05-06 | 沈阳建筑大学 | Existing hollow board beam bridge bearing separation consolidating structure and construction method |
| CN109183615A (en) * | 2018-08-17 | 2019-01-11 | 中铁大桥勘测设计院集团有限公司 | A kind of more girder formula steel reinforced concrete combination continuous beams |
| CN114687448A (en) * | 2022-06-02 | 2022-07-01 | 清华大学 | Transfer beam, building structure and construction method |
-
2015
- 2015-01-27 CN CN201520054952.1U patent/CN204570501U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594211A (en) * | 2015-01-27 | 2015-05-06 | 沈阳建筑大学 | Existing hollow board beam bridge bearing separation consolidating structure and construction method |
| CN109183615A (en) * | 2018-08-17 | 2019-01-11 | 中铁大桥勘测设计院集团有限公司 | A kind of more girder formula steel reinforced concrete combination continuous beams |
| CN109183615B (en) * | 2018-08-17 | 2020-05-26 | 中铁大桥勘测设计院集团有限公司 | Multi-main-beam type steel-concrete combined continuous beam |
| CN114687448A (en) * | 2022-06-02 | 2022-07-01 | 清华大学 | Transfer beam, building structure and construction method |
| CN114687448B (en) * | 2022-06-02 | 2022-09-02 | 清华大学 | Transfer beam, building structure and construction method |
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| Date | Code | Title | Description |
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| 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: 20150819 Termination date: 20160127 |
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| EXPY | Termination of patent right or utility model |