CN203270466U - Reinforcing apparatus for pre-stress of concrete bridge - Google Patents
Reinforcing apparatus for pre-stress of concrete bridge Download PDFInfo
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- CN203270466U CN203270466U CN 201220576257 CN201220576257U CN203270466U CN 203270466 U CN203270466 U CN 203270466U CN 201220576257 CN201220576257 CN 201220576257 CN 201220576257 U CN201220576257 U CN 201220576257U CN 203270466 U CN203270466 U CN 203270466U
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- concrete
- bridge floor
- stress
- top board
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Abstract
The utility model discloses a reinforcing apparatus for pre-stress of a concrete bridge and the apparatus comprises a plurality of pore canals passing through a bridge roof, concrete anchor blocks arranged under the bridge roof and pre-stress wires passing through each hole channel, wherein one end of each pre-stress wire is fastened on the concrete anchor block and the other end is arranged on the bridge floor of the concrete bridge; pre-stress wires corresponding to each pore canal are paralleled distributed on the bridge floor; and the concrete anchor block comprises a steel net inserted into the bridge floor roof and concrete poured into the steel net. The reinforcing apparatus for pre-stress of a concrete bridge is easy to construct and costs less; concrete anchor blocks usually can bear tensioning and anchoring of multi-beam pre-stress with large tonnage; and constructional difficulty of normal external pre-stress passing through thick concrete diaphragm plates is overcome with good reinforcing adaptability.
Description
Technical field
The utility model relates to a kind of bridge floor prestressed reinforcement device, more particularly, relates in particular to a kind of bridge floor prestressed reinforcement device for concrete-bridge.
Background technology
The prestressed reinforcement device that is used for Loads of Long-span Bridges at present adopts finished product prestressing force external tendon usually, and its arrangement form can be selected flexibly according to the bridge section form, generally is arranged in the girder casing for the case beam, usually is arranged on case web side or base plate; And then prefabricated band corrosion-resistant prestress wire, organizator External prestressed after stretch-draw be installed.
Arrange in this case beam body that external prestressing also has self inevitable shortcoming, is mainly reflected in:
1, need core-drawing pore-creating on the extremely thick end diaphragm of diaphragm, precast beam and Cast-in-situ Beam junction in the case beam, be subjected to the interior spatial constraints of case, the facility difficulty of construction is very large, need arrange the measure that turns to simultaneously;
2, adopt external finished product rope, cost is higher;
3, due to Strands Layout in beam, the centre of form is apart from large without the bridge floor rope, so stock utilization is lower, needs to use more steel strand under equal stress effect;
4, for satisfying the line style arrangement requirement, some position need to arrange steering block;
5, when bridge span is larger, can there be long steel bundle straightway, for fear of resonance effects, need to a damping device be set every 10m;
6, external bundle prestress system and structure are without cohering, and with the deformation of structure respective cross-section, the inharmonious of this distortion will produce quadratic effect.
Another cloth bundle mode of the prior art: Prestressing cloth bundle after bridge floor.Arrange that bridge floor prestressing force specific practice is: after cutting former bridge deck pavement, according to newly-increased prestressed quantity, at the case back section prestressed cable that is arranged in parallel, can select directly to lay steel strand or the bellows lashing after-pouring layer (namely can according to circumstances select pre-tensioning system or post stretching) of mating formation first is set according to the later stage layer thickness of mating formation, avoid the former steel strand of bridge and back down cutter at the case web, anchor measure is set.If employing pre-tensioning system, stretch-draw bridge floor prestressing force after-pouring bridge deck concrete; If when adopting pre-buried bellows post stretching, the bridge deck concrete of first mating formation carries out stretch-draw again after concrete strength reaches requirement.
After bridge floor, the shortcoming of Prestressing cloth bundle is as follows:
1, the bridge floor steel strand are arranged in the top board position, need the former case back plate can not be too thin on structure requires, and satisfy the force structure requirement that prestressing tendon is set;
2, the bridge floor steel strand later stage needs the reinforced concrete bridge deck covering of mating formation, and requires in theory the Calculation of Thickness of Bridge Deck Pavement can not be too thin, so as not to mat formation run cracking in the future can be to steel Shu Zaocheng corrosion;
Although 3, bridge floor prestressing force anchor block simple structure, limited by top plate thickness, set bundle number can not be too many in single anchor block, so will configure more high-prestressed the time, relatively configure more independently anchor block;
4, the stress the evolving path is larger on deck paving impact, and the anchor block position will be carried out the steel mesh reinforcement reinforcement and process, and avoids runing cracking occurring in the future;
5, the stress improvement effect of web is little, and is less to the shear behavior improvement of girder;
6, bridge floor prestressing force can not arbitrarily be changed, and the words that need to change will be lifted deck paving and be removed, and increase cost.
The utility model content
The purpose of this utility model is for above-mentioned the deficiencies in the prior art, provides a kind of flexible arrangement for concrete-bridge and compliance good bridge floor prestressed reinforcement device.
the technical solution of the utility model is achieved in that a kind of bridge floor prestressed reinforcement device for concrete-bridge, this concrete-bridge comprises top board, be arranged on the web of vertical setting of top board below and the transverse slat that is arranged on top board below horizontally set, this bridge floor prestressed reinforcement device comprises some ducts of penetrating bridge back plate, be arranged on the concrete anchor block of bridge top board below and pass each duct and an end is fixed on prestress wire in concrete anchor block, the prestress wire other end is arranged on the bridge floor of concrete-bridge, parallel to each other being distributed on bridge floor of prestress wire in corresponding each duct, concrete anchor block comprises and is implanted to the steel mesh reinforcement in the bridge top board and is poured in the steel mesh reinforcement inner concrete.
Be provided with in described duct for concrete and pour into bellows in steel mesh reinforcement.
The intersection of described duct and bridge floor is provided with the steel plate that is positioned at the prestress wire below.
The below of described bridge top board and the position of corresponding concrete anchor block are provided with some grooves.
Also be provided with some round bars that are positioned at prestress wire below and horizontally set on described bridge floor.
Described prestress wire arranges near the bridge web, and described concrete anchor block arranges near the bridge transverse slat.
Technical advantage of the present utility model is embodied in:
1. construction is convenient, cost is lower: what bridge floor prestressing force fastening devices adopted on the whole is bridge floor cloth bundle mode, passes through the difficulty construction of extremely thick diaphragm and the expensive cost of using the external prestressing steel strand to bring when having avoided the interior cloth bundle of case;
2. steel bundle utilization rate is high: prestress wire is arranged on bridge top board face, distant apart from cross-sectional neutral axis, and material use is abundant, and prestressing force efficient is higher, so steel strand are low-consuming.
3. the anchor block design flexibility is high: at first, the position of prestress wire can be arranged in response to the bridge floor situation; Secondly, adopt anchorage style in case, because space in case is sufficient, the anchor block molded dimension can carry out rational Design on Plane fully as required in form; In addition, in case, anchor block can adapt to the prestressed stretch-draw of multi beam large-tonnage and anchoring usually, solves the defective that the prestressed bridge floor anchoring part of traditional bridge floor can only carry out little tonnage prestressed stretch-draw anchor.
Description of drawings
The utility model is described in further detail below in conjunction with the embodiment in accompanying drawing, but do not consist of any restriction of the present utility model.
Fig. 1 is the structural representation of bridge floor prestressed reinforcement device of the present utility model.
Fig. 2 is the structural representation of the concrete anchor block in bridge floor prestressed reinforcement device shown in Figure 1.
Fig. 3 is the cross section structure schematic diagram of concrete anchor block shown in Figure 2.
Fig. 4 is the top view of the utility model bridge floor prestressed reinforcement device under the use state.
Fig. 5 is the front view of the utility model bridge floor prestressed reinforcement device under the use state.
In figure: top board 1, web 2, transverse slat 3, duct 4, concrete anchor block 5, prestress wire 6, bellows 7, steel plate 8, steel mesh reinforcement 9, groove 10, round bar 11.
The specific embodiment
Consult Fig. 1 to shown in Figure 5, the utility model has disclosed a kind of bridge floor prestressed reinforcement device for concrete-bridge, and this concrete-bridge comprises top board 1, be arranged on the web 2 of vertical setting of top board 1 below and the transverse slat 3 that is arranged on top board 1 below horizontally set.This bridge floor prestressed reinforcement device comprise penetrating bridge back plate 1 some ducts 4, be arranged on the concrete anchor block 5 of bridge top board 1 below and pass each duct 4 and an end is fixed on prestress wire 6 in concrete anchor block 5.
Duct 4 tilts to connect the upper and lower side of top board 1, and duct 4 is provided with the bellows 7 of being convenient to build formation concrete anchor block 5.And duct 4 is provided with the intersection of bridge floor the steel plate 8 that is positioned at the prestress wire below, and this steel plate 8 is arranged on the turning point of prestress wire 6, can disperse like this 1 concentrated force of 6 pairs of top boards of prestress wire, protection top board 1.
The position of the below of bridge top board 1 and corresponding concrete anchor block 5 is provided with some grooves 10, forms zigzag, can increase like this shearing resistance of the bonding surface of top board 1 and concrete anchor block 5.
Also be provided with some round bars 11 that are positioned at prestress wire 6 belows and horizontally set on described bridge floor, can reduce like this friction between prestress wire 6 and top board 1.
Described prestress wire 6 arranges near bridge web 2, and described concrete anchor block 5 arranges (joining in detail Fig. 4) near bridge transverse slat 3.Concrete anchor block 5 is arranged on bridge top board 1, web 2 and transverse slat 3 folded position, corner, then be combined firmly with top board, web, transverse slat by modes such as bar plantings, so just, can adapt to large-tonnage, the prestressed concentrated anchoring of multi beam number, and the subsidiary stress that causes can be spread effectively to peripheral top board 1 and web 2 by concrete anchor block also.
The job practices of a kind of bridge floor prestressed reinforcement device for concrete-bridge of the utility model is as follows:
1. bridge openings in the ceiling:
Bridge floor prestress wire 6 is anchored at the girder top board below 1, need to vertically turn at anchorage zone, so first will be in perforate road, the position of bridge floor top board 14, duct 4 can be undertaken by the mode of boring, and the size of perforate is determined according to the radical of the prestress wire 6 of arranging; To the regional affixing steel plate 8 that the steering position of prestress wire 6 contacts with bridge top board 1, as stress diffusion and local the reinforcement, avoid steel strand to contact with the bridge top board and cause the excessive generation destruction of local concrete stress.
2. at 1 time newly-increased concrete anchor block of top board:
The setting of concrete anchor block is similar to common prestressing with bond anchor block, at first implants horizontal and vertical reinforcing bar and form steel mesh reinforcement 9 between top board 1, web 2, transverse slat 3, then the steel mesh reinforcement penetration concrete is formed concrete anchor block.
3. prestress wire cloth rope:
The layout of bridge floor prestress wire 6 is distributed in the web near zone as far as possible, and prestressed like this transmission is more direct, can obtain better effect.Prestress wire consider to adopt the steel strand with epoxy coating, generation that like this can more effective inhibition corrosion.Adopt as far as possible and be close to bridge floor and arrange, to increase the later stage deck paving as the thickness of steel strand topping as far as possible.Be fit to adopt multi beam and the less distribution mode of every bundle steel strand number of share of stock is close to the top board face to make steel strand as far as possible.
4. prestressed stretch-draw and sealing off and covering anchorage:
Suggestion adopts flat anchor as prestressed anchor head, so both can reduce the thickness of concrete anchor block, also is conducive to bridge floor prestressing force and scatters on bridge floor.Prestressed stretch-draw and sealing off and covering anchorage mode are identical with common prestressing force.
Bridge floor prestressed reinforcement device of the present utility model can be adjusted very easily in response to the bridge floor situation; Secondly, adopt anchorage style in case, because space in case is sufficient, the anchor block molded dimension can carry out rational Design on Plane fully as required in form; In addition, concrete anchor block of the present utility model can adapt to the prestressed stretch-draw of multi beam large-tonnage and anchoring usually, solve the defective that the prestressed bridge floor anchoring part of traditional bridge floor can only carry out little tonnage prestressed stretch-draw anchor, avoided external prestressing cloth bundle in case need to bore a hole, increase the complexity such as large-scale steering block, difficult technique and the cost of corresponding increase on very thick diaphragm, so this novel pre-stressed bracing means has advantages of that reinforcing compliance is good, flexible arrangement, economic benefits.
Claims (6)
1. bridge floor prestressed reinforcement device that is used for concrete-bridge, this concrete-bridge comprises top board, be arranged on the web of vertical setting of top board below and the transverse slat that is arranged on top board below horizontally set, it is characterized in that: this bridge floor prestressed reinforcement device comprises some ducts of penetrating bridge back plate, be arranged on the concrete anchor block of bridge top board below and pass each duct and an end is fixed on prestress wire in concrete anchor block, the prestress wire other end is arranged on the bridge floor of concrete-bridge, parallel to each other being distributed on bridge floor of prestress wire in corresponding each duct, concrete anchor block comprises and is implanted to the steel mesh reinforcement in the bridge top board and is poured in the steel mesh reinforcement inner concrete.
2. the bridge floor prestressed reinforcement device for concrete-bridge as claimed in claim 1 is characterized in that: be provided with in described duct for concrete and pour into bellows in steel mesh reinforcement.
3. the bridge floor prestressed reinforcement device for concrete-bridge as claimed in claim 2 is characterized in that: the intersection of described duct and bridge floor is provided with the steel plate that is positioned at the prestress wire below.
4. the bridge floor prestressed reinforcement device for concrete-bridge as claimed in claim 3, it is characterized in that: the below of described bridge top board and the position of corresponding concrete anchor block are provided with some grooves.
5. the bridge floor prestressed reinforcement device for concrete-bridge as claimed in claim 1, is characterized in that: also be provided with some round bars that are positioned at prestress wire below and horizontally set on described bridge floor.
6. the bridge floor prestressed reinforcement device for concrete-bridge as claimed in claim 1, is characterized in that: the close bridge web setting of described prestress wire, the close bridge transverse slat setting of described concrete anchor block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576257 CN203270466U (en) | 2012-11-02 | 2012-11-02 | Reinforcing apparatus for pre-stress of concrete bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576257 CN203270466U (en) | 2012-11-02 | 2012-11-02 | Reinforcing apparatus for pre-stress of concrete bridge |
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| Publication Number | Publication Date |
|---|---|
| CN203270466U true CN203270466U (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220576257 Expired - Fee Related CN203270466U (en) | 2012-11-02 | 2012-11-02 | Reinforcing apparatus for pre-stress of concrete bridge |
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| CN (1) | CN203270466U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926440A (en) * | 2016-05-09 | 2016-09-07 | 湖南城市学院 | Steel-concrete combined continuous beam bridge deck as well as manufacturing method and application thereof |
| CN111155449A (en) * | 2020-01-10 | 2020-05-15 | 东南大学 | Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method |
| CN112982187A (en) * | 2021-02-10 | 2021-06-18 | 同济大学 | Method for replacing curve prestressed steel beam in damaged bridge body and reinforcing bridge structure |
| CN113338161A (en) * | 2021-04-15 | 2021-09-03 | 广东省交通规划设计研究院集团股份有限公司 | Concrete box girder top surface prestress steel beam tensioning structure and construction method thereof |
| CN114016387A (en) * | 2021-10-20 | 2022-02-08 | 长安大学 | Bridge anti-explosion device for preventing collapse |
| CN114960482A (en) * | 2022-06-20 | 2022-08-30 | 保利长大工程有限公司 | Method for safely and efficiently removing external prestress |
| CN115821791A (en) * | 2023-02-15 | 2023-03-21 | 湖南大学 | Anchoring structure of combined beam external prestress steering device |
-
2012
- 2012-11-02 CN CN 201220576257 patent/CN203270466U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926440A (en) * | 2016-05-09 | 2016-09-07 | 湖南城市学院 | Steel-concrete combined continuous beam bridge deck as well as manufacturing method and application thereof |
| CN111155449A (en) * | 2020-01-10 | 2020-05-15 | 东南大学 | Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method |
| CN112982187A (en) * | 2021-02-10 | 2021-06-18 | 同济大学 | Method for replacing curve prestressed steel beam in damaged bridge body and reinforcing bridge structure |
| CN112982187B (en) * | 2021-02-10 | 2022-06-21 | 同济大学 | Method for replacing curve prestressed steel beam in damaged bridge body and reinforcing bridge structure |
| CN113338161A (en) * | 2021-04-15 | 2021-09-03 | 广东省交通规划设计研究院集团股份有限公司 | Concrete box girder top surface prestress steel beam tensioning structure and construction method thereof |
| CN114016387A (en) * | 2021-10-20 | 2022-02-08 | 长安大学 | Bridge anti-explosion device for preventing collapse |
| CN114960482A (en) * | 2022-06-20 | 2022-08-30 | 保利长大工程有限公司 | Method for safely and efficiently removing external prestress |
| CN115821791A (en) * | 2023-02-15 | 2023-03-21 | 湖南大学 | Anchoring structure of combined beam external prestress steering device |
| CN115821791B (en) * | 2023-02-15 | 2023-04-18 | 湖南大学 | Anchoring structure of combined beam external prestress steering device |
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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: 20131106 Termination date: 20151102 |
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| EXPY | Termination of patent right or utility model |