CN202450439U - Expansion joint structure of seamless bridge in road engineering - Google Patents
Expansion joint structure of seamless bridge in road engineering Download PDFInfo
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- CN202450439U CN202450439U CN2012202225275U CN201220222527U CN202450439U CN 202450439 U CN202450439 U CN 202450439U CN 2012202225275 U CN2012202225275 U CN 2012202225275U CN 201220222527 U CN201220222527 U CN 201220222527U CN 202450439 U CN202450439 U CN 202450439U
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Abstract
The utility model discloses an expansion joint structure of a seamless bridge in road engineering. The expansion joint structure of the seamless bridge in the road engineering comprises beam bodies, expansion joints, elastic-plastic bodies and base plates, wherein concrete paving layers are arranged on the beam bodies, a reserved rabbet is formed between two adjacent concrete paving layers, a seam is positioned between two adjacent beam bodies or the beam body and a bridge abutment; the base plates are positioned on the bottom surfaces of the reserved rabbets to close the seams, the base plates are arranged below the elastic-plastic bodies; the elastic-plastic bodies are positioned in the reserved rabbets to form elastic-plastic body expansion joints, and asphalt concrete layers are paved on the concrete paving layers and the elastic-plastic body expansion joints in a penetrating way. According to the utility model, a real seamless bridge can be formed; and the utility model has the advantages of higher structure safety, much convenience for construction and convenience for replacement.
Description
Technical field
The utility model belongs to the shrinkage joint technical field of highway construction, relates in particular to the seamless deck expansion joint structure of a kind of highway construction, mainly is applicable to form seamless bridge floor in the highway construction.
Background technology
Expansion gap device is the indispensable part of Assessment of Highway Bridge Structures; And the stretching device problem is a great problem in the highway communication always; According to a relevant statistics of the U.S.; Although the expense at bearing and shrinkage joint only accounts for 5% of bridge total cost, if design improper, installation quality is inferior and when lacking maintenance, can cause that 95% bridge goes wrong.Therefore, the shrinkage joint problem should cause enough attention.
In the prior art, normally used bridge extension joint generally is to be installed on the bridge at last, and long term exposure is in atmospheric environment, and environment for use is abominable, does not often give enough attention and can realize normal function of use to guarantee it.Bridge expanssion joint is bearing the percussion from the abrasion and the heavily loaded traffic of mobile load on the one hand, is also bearing the influence of the continuous displacement that causes because of temperature movement, shrinkage and creep or factors such as foundation settlement and soil pressure on the other hand.The overload of highway transportation at present situation is more and more serious, and these load percussions that surpass design bearing capacity have shortened the working life at shrinkage joint more.In case the shrinkage joint is damaged, will cause bigger vehicular impact effect, make the driving situation further worsen.Repairing or replace the shrinkage joint is very bothersome, effort and time-consuming, chisel the concrete on both sides, up to taking out original anchorage structure, sets up new shrinkage joint and anchorage thereof, recovers concreting, and health just can be open to traffic then.
To the above drawback of expanded joint structure, two kinds of solutions are arranged usually: the one, stretching device is improved, the 2nd, deck expansion installation is set as few as possible even with its cancellation.Obviously second method more can reach the purpose of " treating both principal and secondary aspect of disease ".Follow this thinking two kinds of methods are also arranged usually: the first increases continuous span length to reduce the quantity of stretching device as far as possible to big-and-middle bridge construction; It two is for medium and small bridge construction, attempts to fully phase out stretching device, promptly builds seamless bridge; The dilatation of beam body absorbs through some special measures, thereby can realize complete smooth and easy comfortable on the rideability, and therefore arise at the historic moment at seamless shrinkage joint; Elastic body property shrinkage joint is claimed at seamless shrinkage joint again; Mainly be that the high-elastic high viscosity material of employing is a binding material, form according to certain ratio mix, can absorb certain dilatation with suitable aggregate.There has been more application at present seamless shrinkage joint medium and small striding in the bridge of footpath, and for example, the elastic body device is used at the disclosed a kind of building of Chinese patent number " 201010543479.5 ", highway construction shrinkage joint.
But expanded joint structure of the prior art; Mainly also have following shortcoming: one, the shrinkage joint is steel formula shrinkage joint and modulus formula shrinkage joint; These two types of shrinkage joint have good telescopicing performance; Can satisfy telescopic displacement, when still current apparent in view jumping car phenomenon arranged, road-ability is had bigger influence than the long-span bridge beam.Two, seamless shrinkage joint (elastic body shrinkage joint) technical application is confined to old bridge transformation in medium and small footpath of striding and reinforcing more; And expanded joint structure all is positioned at the bridge floor layer; And this type expanded joint structure uses and not to form real seamless bridge floor, though on road-ability by bigger improvement, because there are performance difference in elastic body structure and other bridge deck structures; So road-ability is also had certain influence, and because the difference on the color and luster has certain influence to outward appearance.
Summary of the invention
The purpose of the utility model is to overcome the problems referred to above that existing bridge expansion joint structure exists; Provide a kind of highway construction seamless deck expansion joint structure, the utility model can form real seamless bridge floor, and safety of structure is higher; And it is more convenient to construct, and is convenient to change.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is following:
Deck expansion joint structure that a kind of highway construction is seamless; Comprise beam body and shrinkage joint, said beam body is provided with concrete pavement layer, forms between adjacent two concrete pavement layers to reserve notch; Between adjacent two beam bodies or beam body and the abutment slit is arranged; It is characterized in that: also comprise elastic body and backing plate, said backing plate is positioned at reserves sealing slit, notch bottom surface, and backing plate is arranged under the elastic body; Elastic body is positioned at reserves notch formation elastic body shrinkage joint, on concrete pavement layer and elastic body shrinkage joint, connects the making asphalt concrete layer.
Said asphalt concrete layer comprises the bituminous concrete upper strata in bituminous concrete lower floor and the bituminous concrete lower floor.
Said welding with backing is connected to two or four locating parts, and locating part is positioned on the backing plate soffit transversal centerline when being two, and locating part is positioned at the place, four angles of backing plate when being four.
Said locating part is a reinforcing bar, and diameter is 8-12mm, and length is 4-6cm.
Said locating part is a bolt, and length 3-5cm, diameter 5-10mm.
Said backing plate is a steel plate, and thickness 1-1.6cm, and width is 45-55cm, length 25-35cm.
Said elastic body shrinkage joint width is 45-55cm; Thickness is 8-12cm.
The thickness of said bituminous concrete lower floor is 5-7cm, and the thickness on bituminous concrete upper strata is 3-5 cm.
Adopt the advantage of the utility model to be:
One, the utility model also comprises elastic body and backing plate, and said backing plate is positioned at reserves sealing slit, notch bottom surface, and backing plate is arranged under the elastic body; Elastic body is positioned at reserves notch formation elastic body shrinkage joint; On concrete pavement layer and elastic body shrinkage joint, connect the making asphalt concrete layer, this structure has formed real seamless bridge floor, and safety of structure is higher; And cost is suitable, is convenient to change.
Two, in the utility model, said asphalt concrete layer comprises the bituminous concrete upper strata in bituminous concrete lower floor and the bituminous concrete lower floor, satisfies the thickness requirement of asphalt concrete construction easily, and improves road-ability.
Three, in the utility model; Said welding with backing is connected to two or four locating parts; Locating part is positioned on the backing plate soffit transversal centerline when being two, and locating part is positioned at the place, four angles of backing plate and reserves the certain protection spacing when being four, and backing plate is played position-limiting action; The assurance backing plate is not subjected to displacement and comes off, and ensures that the shrinkage joint has the ability of bearing longitudinal load.
Four, in the utility model; Said locating part is a reinforcing bar, and diameter is 8～12mm, and length is 4-6cm; Perhaps said connector is a bolt; And length 3-5cm, diameter 5-10mm, locating part diameter or length can too much take space limited between the beam body during greater than maximum size, the little effect that can not reach the displacement of restriction backing plate during with minimum dimension of diameter or length.
Five, in the utility model; Said backing plate is a steel plate, and thickness 1-1.6cm, and width is 45-55cm; Length 25-35cm; Thickness 1-1.6cm guarantees to have enough vertical bearing capacities and do not take too much space, shrinkage joint, and width is that 45-55cm guarantees that backing plate can suitably adapt to the irregular situation of contact surface at direction across bridge, and length 25-35cm guarantees that backing plate does not come off because of being subjected to displacement.
Six, in the utility model, said elastic body shrinkage joint width is 45-55cm; Thickness is 8-12cm; The requirement that can guarantee to satisfy stroke during width 45-55cm can be not too high because of the oversize construction cost that causes yet; Thickness is that 8-12cm then guarantees elastic body shrinkage joint and concrete binding, and carries out the thickness adjustment according to reserving the notch size.
Seven, in the utility model, the thickness of said bituminous concrete lower floor is 5-7cm, and the thickness on bituminous concrete upper strata is 3-5 cm, satisfies the maximum ga(u)ge requirement of asphalt concrete construction, and keeps the road-ability of asphalt concrete pavement to greatest extent.
Description of drawings
Fig. 1 is the utility model structural representation
Be labeled as among the figure: 1, beam body, 2, concrete pavement layer, 3, the slit, 4, elastic body, 5, backing plate, 6, bituminous concrete lower floor, 7, the bituminous concrete upper strata, 8, locating part.
The specific embodiment
Embodiment 1
Deck expansion joint structure that a kind of highway construction is seamless; Comprise beam body 1 and shrinkage joint, said beam body 1 is provided with concrete pavement layer 2, forms between adjacent two concrete pavement layers to reserve notch; Between adjacent two beam bodies or beam body and the abutment slit 3 is arranged; Also comprise elastic body 4 and backing plate 5, said backing plate 5 is positioned at reservation notch bottom surface can seal slit 3, and backing plate 5 is arranged on elastic body 4 times; Elastic body 4 is positioned at reserves notch formation elastic body shrinkage joint, on concrete pavement layer 2 and elastic body shrinkage joint, connects the making asphalt concrete layer.
The preferred implementation of the utility model does, said asphalt concrete layer comprises the bituminous concrete upper strata 7 in bituminous concrete lower floor 6 and the bituminous concrete lower floor, and this is a preferred implementation, is not limited thereto embodiment.
The another preferred implementation of the utility model does, said backing plate 5 is welded with two or four locating parts 8, and when being two, locating part 8 is positioned on the backing plate 5 soffit transversal centerline, and when being four, locating part 8 is positioned at the place, four angles of backing plate 5.
In the utility model, said locating part 8 is a reinforcing bar, and diameter is 8mm, and length is 4cm.Said backing plate 5 is a steel plate, and thickness 1cm, and width is 45cm, length 25cm.Said elastic body shrinkage joint width is 45cm; Thickness is 8cm.The thickness of said bituminous concrete lower floor 6 is 5cm, and the thickness on bituminous concrete upper strata 7 is 3 cm.
Adopt the construction technology of the utility model to do, the elastic body expanded joint structure is arranged in below the bituminous concrete, bituminous concrete connects making and forms seamless bridge floor.
The preferred implementation of construction technology does, when the construction of said shrinkage joint, asphalt concrete pavement, mean daily temperature construct in the time of 8 ℃, and the same day maximum temperature of constructing is no more than 20 ℃, and mean daily temperature is no more than 15 ℃, and the asphalt concrete pavement temperature is not less than 0 ℃.
The another preferred implementation of construction technology does, said elastic body compound is the mixture of bonding material and aggregate, and the consumption of binding material is 30Kg in every linear meter(lin.m.) elastic body compound.
The another preferred implementation of construction technology does, the softening point of said binding material is more than 110 ℃, and the elastic return under 25 ℃ of temperature is more than 85%, and the ductility under 5 ℃ of temperature is more than the 10cm, and the elongation per unit length under 0 ℃ of temperature is more than 40%.
Construction technology another preferred implementation do, said aggregate is a basalt, the footpath scope be 10mm.
Embodiment 2
Present embodiment and the foregoing description are basic identical, and its difference is: said locating part 8 is reinforcing bar, and diameter is 12mm, and length is 6cm.Said backing plate 5 is a steel plate, and thickness 1.6cm, and width is 55cm, length cm.Said elastic body shrinkage joint width is 55cm; Thickness is 12cm.The thickness of said bituminous concrete lower floor 6 is 7cm, and the thickness on bituminous concrete upper strata 7 is 5 cm.
In the construction technology, when the construction of said shrinkage joint, upper strata asphalt concrete pavement, mean daily temperature is constructed in the time of 12 ℃, and construction maximum temperature on the same day is no more than 20 ℃, and mean daily temperature is no more than 15 ℃, and the asphalt concrete pavement temperature is not less than 0 ℃.Said elastic body compound is the mixture of bonding material and aggregate, and the consumption of binding material is 50Kg in every linear meter(lin.m.) elastic body compound.Said aggregate is a basalt, and the footpath scope is 20mm.
Embodiment 3
Present embodiment and the foregoing description are basic identical, and its difference is: said locating part 8 is reinforcing bar, and diameter is 10mm, and length is 5cm.Said backing plate 5 is a steel plate, and thickness 1.4cm, and width is 50cm, length 30cm.Said elastic body shrinkage joint width is 50cm; Thickness is 10cm.The thickness of said bituminous concrete lower floor 6 is 6cm, and the thickness on bituminous concrete upper strata 7 is 4 cm.
In the construction technology, when the construction of said shrinkage joint, upper strata asphalt concrete pavement, mean daily temperature is constructed in the time of 10 ℃, and construction maximum temperature on the same day is no more than 20 ℃, and mean daily temperature is no more than 15 ℃, and the asphalt concrete pavement temperature is not less than 0 ℃.Said elastic body compound is the mixture of bonding material and aggregate, and the consumption of binding material is 40Kg in every linear meter(lin.m.) elastic body compound.Said aggregate is a basalt, and the footpath scope is 15mm.
Embodiment 4
Present embodiment and the foregoing description are basic identical, and its difference is: said locating part 8 is bolt, and length 3-5cm, for example can select 3,4 or 5cm, and diameter 5-10mm for example can select 5,7 or 10mm.
Embodiment 5
Below the utility model is described further:
The utility model is arranged in expanded joint structure below the bituminous concrete, and bituminous concrete connects making and forms seamless bridge floor.Concrete work progress can for: locate pre-buried backing plate at the shrinkage joint and seal between the adjacent two beam bodies or the slit that forms between end bay beam body and the abutment, and the elastic body compound sealing notch of in notch, mating formation; On concrete pavement layer and elastic body, connect making bituminous concrete lower floor and bituminous concrete upper strata successively.
In the construction technology, aggregate and binding material mix form the elastic body compound, compound below pre-embedded steel slab, and welded reinforcement or bolt on the steel plate connect the making asphalt concrete layer above the elastic body compound.
Preferably, the type shrinkage joint technical application span is not more than the medium and small footpath bridge of striding of 50m.
Preferably, the construction of elastic body shrinkage joint, upper strata asphalt concrete pavement all should select mean daily temperature when 10 ℃ of left and right sides, to construct, and construction maximum temperature on the same day is no more than 20 ℃, and mean daily temperature is no more than 15 ℃, and the asphalt concrete pavement temperature must not be lower than 0 ℃.
Preferably, the softening point (ring and ball method) of high-performance elastic body binding material is more than 110 ℃, and elastic return (25 ℃) is more than 85%, and ductility (5 ℃) is more than the 10cm, and elongation per unit length (0 ℃) is more than 40%.
Preferably; High-performance elastic body bonding material can be selected in the modified bitumen that satisfies above-mentioned requirements any or two kinds (high temperature resistant type and plain edition, low temperature resistant type and plain edition) for use; Should select reasonable proportioning according to service condition when selecting for use two kinds of modified bitumens to mix; When using in high temperature resistant area, select high temperature resistant type: high temperature resistant type mixes with the mass ratio of plain edition by 1:1, and when using in low temperature resistant area, select low temperature resistant type: low temperature resistant type mixes in the ratio of 1:1 with plain edition.
Preferably, it is aggregate that compound adopts basalt, and the basalt particle size range is 10～20mm, as when dividing two-layer paving, lower floor's particle size range is 10～20mm, and the upper strata particle size range is 5～15mm.
Preferably, the use amount minimum of binding material must not be less than 30Kg in every linear meter(lin.m.) compound, and maximum must not guarantee that compound has the performance of good absorption telescopic displacement and has good vertical rigidity greater than 50Kg.
Compound below, elastic body shrinkage joint place mat steel plate adopts the straight carbon steel rimmed steel sheet; Steel plate thickness 1.6cm (being not less than 1cm); Steel plate width (direction across bridge length) 50cm (can adjust) according to the notch planeness; Steel plate length (along bridge to length) 30cm, minimum must not be less than 25cm, and length must not surpass 35cm.
The reinforcing bar that is welded on the steel plate bottom adopts the HRB335 grade reinforcing steel of diameter 8～12; (this part welded reinforcement can replace with plain bolt reinforcing bar length 5cm; Bolt length is not less than 3cm, diameter is not less than the 5mm level); The welding position is positioned on the steel plate soffit transversal centerline, and as far as possible near the steel plate edge, every block plate welding 2 reinforcing bars (bolt).
Preferably, the shrinkage joint is of a size of width 50cm, and minimum must not be less than 45cm, maximum must not be greater than 55cm; Thickness 10cm, minimum must not be less than 8cm, maximum must not be greater than 12cm.
Notch is reserved at the elastic body shrinkage joint need have good planeness, adjacently strides that the discrepancy in elevation must not be greater than 0.3cm between the beam body, and notch surface (laterally) does not allow the situation of suddenling change greater than 0.3cm.Elastic body surface and concrete pavement layer flush.
Preferably, notch is reserved at the shrinkage joint should remove waste material, will clear up smoothly to the bottom land thrust, to the serious uneven bridge seam in both sides, with at the bottom of the epoxy mortar treatment trough, is out of shape to avoid down the pading plate generation.
Preferably, the interface brushing cementing agent of reply notch and shrinkage joint bonding is to guarantee good cross section caking property.
Obviously; Those of ordinary skill in the art is according to technological know-how of being grasped and customary means; According to the above content, can also make the various ways that does not break away from the utility model fundamental technics thought, these pro forma conversion are all within the protection domain of the utility model.
Claims (7)
1. seamless deck expansion joint structure of highway construction; Comprise beam body (1) and shrinkage joint, said beam body is provided with concrete pavement layer (2), forms between adjacent two concrete pavement layers to reserve notch; Between adjacent two beam bodies or beam body and the abutment slit (3) is arranged; It is characterized in that: also comprise elastic body (4) and backing plate (5), said backing plate (5) is positioned at reserves sealing slit (3), notch bottom surface, and backing plate (5) is arranged under the elastic body (4); Elastic body (4) is positioned at reserves notch formation elastic body shrinkage joint, on concrete pavement layer (2) and elastic body shrinkage joint, connects the making asphalt concrete layer.
2. the seamless deck expansion joint structure of highway construction according to claim 1 is characterized in that: said asphalt concrete layer comprises the bituminous concrete upper strata (7) in bituminous concrete lower floor (6) and the bituminous concrete lower floor (6).
3. the seamless deck expansion joint structure of highway construction according to claim 1 and 2; It is characterized in that: said backing plate (5) is welded with two or four locating parts (8); Locating part when being two (8) is positioned on backing plate (5) the soffit transversal centerline, and locating part when being four (8) is positioned at the place, four angles of backing plate (5).
4. the seamless deck expansion joint structure of highway construction according to claim 3 is characterized in that: said locating part (8) is a reinforcing bar, and diameter is 8-12mm, and length is 4-6cm.
5. the seamless deck expansion joint structure of highway construction according to claim 3 is characterized in that: said locating part (8) is a bolt, and length 3-5cm, diameter 5-10mm.
6. according to claim 1,2, the seamless deck expansion joint structure of 4 or 5 described highway constructions, it is characterized in that: said backing plate (5) is a steel plate, and thickness 1-1.6cm, and width is 45-55cm, length 25-35cm.
7. the seamless deck expansion joint structure of highway construction according to claim 2 is characterized in that: the thickness of said bituminous concrete lower floor (6) is 5-7cm, and the thickness of bituminous concrete upper strata (7) is 3-5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202225275U CN202450439U (en) | 2012-05-17 | 2012-05-17 | Expansion joint structure of seamless bridge in road engineering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202225275U CN202450439U (en) | 2012-05-17 | 2012-05-17 | Expansion joint structure of seamless bridge in road engineering |
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| CN202450439U true CN202450439U (en) | 2012-09-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660922A (en) * | 2012-05-17 | 2012-09-12 | 四川成渝高速公路股份有限公司成仁分公司 | Seamless bridge deck expansion joint structure for road engineering and construction process of seamless bridge deck expansion joint structure |
| CN103194964A (en) * | 2013-04-26 | 2013-07-10 | 福州大学 | Novel seamless bridge structure adopting swing beam and construction method for novel seamless bridge structure |
| CN103669202A (en) * | 2013-07-10 | 2014-03-26 | 孟献春 | Road and bridge expansion joint structure |
| CN109972499A (en) * | 2019-04-12 | 2019-07-05 | 浙江工业大学 | Seamless stretching structure and construction method among a kind of medium and small span freely-supported highway bridge |
| CN112195769A (en) * | 2020-09-01 | 2021-01-08 | 南京交通职业技术学院 | Construction method for no height difference of asphalt surface layer at bridge expansion joint |
-
2012
- 2012-05-17 CN CN2012202225275U patent/CN202450439U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660922A (en) * | 2012-05-17 | 2012-09-12 | 四川成渝高速公路股份有限公司成仁分公司 | Seamless bridge deck expansion joint structure for road engineering and construction process of seamless bridge deck expansion joint structure |
| CN102660922B (en) * | 2012-05-17 | 2014-01-01 | 四川成渝高速公路股份有限公司成仁分公司 | Seamless bridge deck expansion joint structure for road engineering |
| CN103194964A (en) * | 2013-04-26 | 2013-07-10 | 福州大学 | Novel seamless bridge structure adopting swing beam and construction method for novel seamless bridge structure |
| CN103194964B (en) * | 2013-04-26 | 2015-07-01 | 福州大学 | Novel seamless bridge structure adopting swing beam and construction method for novel seamless bridge structure |
| CN103669202A (en) * | 2013-07-10 | 2014-03-26 | 孟献春 | Road and bridge expansion joint structure |
| CN103669202B (en) * | 2013-07-10 | 2016-05-25 | 孟献春 | Highway-bridge Expansion Joints structure |
| CN109972499A (en) * | 2019-04-12 | 2019-07-05 | 浙江工业大学 | Seamless stretching structure and construction method among a kind of medium and small span freely-supported highway bridge |
| CN112195769A (en) * | 2020-09-01 | 2021-01-08 | 南京交通职业技术学院 | Construction method for no height difference of asphalt surface layer at bridge expansion joint |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20120926 |