CN213448074U - Composite construction suitable for steel bridge deck drainage is mated formation - Google Patents
Composite construction suitable for steel bridge deck drainage is mated formation Download PDFInfo
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- CN213448074U CN213448074U CN201922405955.6U CN201922405955U CN213448074U CN 213448074 U CN213448074 U CN 213448074U CN 201922405955 U CN201922405955 U CN 201922405955U CN 213448074 U CN213448074 U CN 213448074U
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Abstract
The utility model provides a composite construction suitable for steel bridge face drainage is mated formation, a serial communication port, include: the high-viscosity SMA asphalt mastic macadam composite material comprises an upper surface layer, a sealing layer, a middle surface layer, an adhesive layer, a lower surface layer, a waterproof bonding layer, an anticorrosive layer and a bridge floor which are sequentially paved from top to bottom, wherein a high-viscosity SMA asphalt mastic macadam mixed material layer of the middle surface layer is provided with first high-viscosity modified asphalt, the first high-viscosity modified asphalt is composed of No. 70 asphalt and a modifier, the modifier accounts for 6% -11% of the total mass of the first high-viscosity modified asphalt, the usage amount of the first high-viscosity modified asphalt is 5.4% -6.5% of the mass of the high-viscosity SMA asphalt mastic macadam mixed material of the middle surface layer, the first nominal particle size of the middle surface layer is 13.2mm or 9.5mm, and the. The sealing layer is a modified emulsified asphalt layer, a hot asphalt layer or a slurry sealing layer. The adhesive layer is a modified emulsified asphalt layer. The waterproof bonding layer is an epoxy asphalt waterproof bonding layer and stone chips, and the spreading amount of the stone chips is 3-5 mm. The anticorrosive coating is an epoxy zinc-rich paint anticorrosive coating.
Description
Technical Field
The utility model relates to a road bridge construction technical field indicates a composite construction suitable for steel bridge face drainage is mated formation especially.
Background
With the rapid popularization of the concept of sponge cities in China, drainage asphalt pavements are gradually designed and used as elevated asphalt pavement surface layers in various places. The steel bridge deck has the advantages of attractive appearance, light dead weight, strong lateral wind resistance of a box girder and the like, and is widely adopted in the construction of modern bridges (particularly large-span bridges), and cement concrete bridges are still the mainstream form of the existing bridge design due to the advantages of economy, simple and convenient construction and the like, so that the phenomenon that various forms such as a cement concrete bridge section and a steel box girder bridge section coexist in an elevated bridge structure is necessarily caused, and in order to try to unify, a design unit often designs an asphalt pavement surface layer (particularly an upper surface layer of an asphalt pavement) into a structure with the same form.
However, the steel box girder bridge deck is welded and fixed on the orthotropic structural girder and the longitudinal ribs, and the steel bridge deck system has large flexibility and is easy to flex, the deformation and stress characteristics under the action of vehicle load and temperature load are very obviously different from those of a common cement concrete bridge, and the deformation and stress are also very obviously different at different parts of the same bridge, so that the pavement layer is required to have good road performance, high and low temperature stability, water stability and the like; in addition, the steel plate has good heat transfer performance, and is easy to deform and generate shearing force during construction at high temperature, so that the pavement layer is required to have good flexibility and deformation following capability; meanwhile, due to the fact that the paving layers are different in performance, the requirement for the bonding force between the paving layers is higher.
Therefore, how to successfully apply the drainage asphalt pavement to the steel box girder bridge deck pavement is a difficult problem which needs to be solved urgently in the industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a composite construction suitable for steel bridge face drainage is mated formation realizes mating formation the layer and has good cohesion between the layer and warp and pursue the nature, has restrained fissured production for whole steel bridge face structure of mating formation has good anti rut, anti infiltration performance.
The utility model provides a technical scheme as follows:
a composite structure suitable for drainage paving of a steel deck, comprising: the high-viscosity modified asphalt comprises No. 70 asphalt and a modifier, wherein the modifier accounts for 6-11% of the total mass of the first high-viscosity modified asphalt, the usage amount of the first high-viscosity modified asphalt is 5.4-6.5% of the mass of the high-viscosity SMA asphalt mastic macadam mixture of the middle surface layer, the first nominal particle size of the middle surface layer is 13.2mm or 9.5mm, and the second preset thickness of the middle surface layer is 30-50 mm.
According to the technical scheme, the high-viscosity SMA asphalt mastic macadam mixture is used as the middle surface layer, so that the mixture has good interlayer binding force and deformation following performance, cracks are inhibited, and the whole steel bridge deck pavement structure has good anti-rutting and anti-seepage performance.
The high-viscosity discontinuous semi-open graded asphalt mixture layer of the lower layer consists of aggregate, filler, polymer fiber and second high-viscosity modified asphalt, the void ratio is 8-12%, the second nominal particle size of the lower layer is 19mm or 13.2mm, the third preset thickness is 30-60 mm, the aggregate consists of coarse aggregate and fine aggregate, the coarse aggregate is diabase, basalt or limestone, the fine aggregate is limestone, the filler is limestone mineral powder or rock pulp mineral powder, and the polymer fiber is selected from one of the following substances: polyester fiber, polyacrylonitrile fiber, and mixed fiber of polyester fiber and polyacrylonitrile fiber, wherein the using mass of the second high-viscosity modified asphalt is 5.8-6.8% of the mass of the high-viscosity discontinuous semi-open graded asphalt mixture,
the second high-viscosity modified asphalt consists of No. 70 asphalt and a modifier, wherein the modifier accounts for 10-13% of the total mass of the second high-viscosity modified asphalt.
According to the technical scheme, the high-viscosity discontinuous semi-open graded asphalt mixture is used as the lower surface layer, so that the mixture has good deformation characteristics and excellent shear resistance and fatigue resistance, and the generation and extension of cracks caused by the deformation of the steel bridge deck can be effectively inhibited, so that the whole bridge deck structure has good anti-rutting and fatigue resistance.
Preferably, the upper layer is an OGFC-13 open-graded asphalt mixture layer and has a first preset thickness of 40-50 mm.
Specifically, the seal layer is a modified emulsified asphalt layer, a hot asphalt layer or a slurry seal layer. The adhesive layer is a modified emulsified asphalt layer. The waterproof bonding layer is an epoxy asphalt waterproof bonding layer and stone chips, and the spreading amount of the stone chips is 3-5 mm. The anticorrosive coating is an epoxy zinc-rich paint anticorrosive coating. The upper layer OGFC-13 open-graded asphalt mixture comprises third high-viscosity modified asphalt with the porosity of 18-22%, the third high-viscosity modified asphalt comprises No. 70 asphalt and a modifier, the modifier accounts for 10-14% of the total mass of the third high-viscosity modified asphalt, and the usage amount of the third high-viscosity modified asphalt is 4.6-5.2% of the mass of the upper layer OGFC-13 open-graded asphalt mixture. The middle-surface-layer high-viscosity SMA asphalt mastic macadam mixture also comprises aggregates, fillers and polymer fibers, the void ratio is 2% -4%, the aggregates consist of coarse aggregates and fine aggregates, and the coarse aggregates are diabase, basalt or limestone; the fine aggregate is limestone, the filler is limestone mineral powder, and the polymer fiber is selected from one of the following substances: polyester fibers, polyacrylonitrile fibers, and mixed fibers of polyester fibers and polyacrylonitrile fibers.
The utility model provides a pair of low pressure direct current servo driver can bring following at least one beneficial effect:
1. the high-viscosity discontinuous semi-open graded asphalt mixture is adopted as the lower surface layer, so that the mixture has good deformation characteristic and excellent anti-shearing and anti-fatigue capability, the generation and extension of cracks caused by the deformation of the steel bridge surface can be effectively inhibited, the whole bridge surface structure has good anti-rutting and anti-fatigue performance,
2. the high-viscosity SMA asphalt mastic macadam mixture is adopted as the middle surface layer, so that the mixture has good interlayer bonding force and deformation following performance, the generation of cracks is inhibited, the whole steel bridge deck pavement structure has good anti-rutting and anti-seepage performance,
3. the OGFC-13 open-graded asphalt mixture layer is used as the upper layer, so that the safety and comfort performance of the drainage asphalt pavement are fully exerted, and the problem of large-area popularization and application of the drainage asphalt pavement in the pavement of the viaduct bridge deck is solved.
Drawings
The above characteristics, technical features, advantages and realisations of a composite structure suitable for the drainage laying of steel bridge decks will be further described in a clearly understandable way, with reference to the accompanying drawings, which illustrate preferred embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
In one embodiment of the present invention, as shown in fig. 1, a composite structure 100 suitable for drainage pavement of a steel bridge deck comprises an upper surface layer 110, a sealing layer 120, a middle surface layer 130, an adhesive layer 140, a lower surface layer 150, a waterproof bonding layer 160, an anti-corrosion layer 170 and a bridge deck 180, which are sequentially laid from top to bottom.
The high-viscosity SMA asphalt mastic macadam mixed material layer of the middle surface layer 130 is provided with first high-viscosity modified asphalt, the first high-viscosity modified asphalt is composed of No. 70 asphalt and a modifier, the modifier accounts for 6% -11% of the total mass of the first high-viscosity modified asphalt, the usage amount of the first high-viscosity modified asphalt is 5.4% -6.5% of the mass of the high-viscosity SMA asphalt mastic macadam mixed material of the middle surface layer 130, the first nominal particle size of the middle surface layer 130 is 13.2mm or 9.5mm, and the second preset thickness is 30 mm-50 mm. The high-viscosity SMA asphalt mastic macadam mixture is used as the middle surface layer 130, so that the mixture has good interlayer binding force and deformation following performance, the generation of cracks is inhibited, and the whole steel bridge deck pavement structure has good anti-rutting and anti-seepage performance.
In a high viscosity SMA asphalt mastic macadam mixture with a nominal maximum particle size of 13.2mm, the aggregate and filler grading is as follows:
in a high viscosity SMA asphalt mastic macadam mixture with a nominal maximum particle size of 9.5mm, the aggregate and filler grading is as follows:
the common modified asphalt has low viscosity, so that the shearing resistance of the asphalt mixture is insufficient, and the phenomena of pushing and the like are easy to occur. The common modified SMA asphalt mastic macadam mixture needs to be vibrated and rolled, and the phenomenon of insufficient compactness is easily caused under the condition of bridge deck resonance, so that early diseases are caused. This patent adopts high viscosity SMA pitch mastic gravel mixture as well surface course 130, and the mineral aggregate level in the bituminous mixture joins in marriage the composition and becomes dense gradation, has effectively reduced bituminous mixture's void ratio (only be 2% -4%), has strengthened bituminous mixture's durability, ageing resistance and water damage resistance ability. In addition, high-viscosity modified asphalt is adopted to replace common modified asphalt, the dynamic viscosity of the high-viscosity modified asphalt is greater than 20000 Pa.s and less than 2 Pa.s at the temperature of 60 ℃, so that the micro strain of a 130 high-viscosity SMA asphalt mastic and macadam mixed material layer of the middle surface layer exceeds 2500 mu m, the problem of the following capability of an asphalt pavement layer under the deformation of a steel bridge deck is solved, the pavement layer does not crack along with the deformation of the steel bridge deck, the generation of cracks, pushing and other diseases is inhibited, the service life of the steel bridge deck is prolonged, non-vibration compaction can be realized on the steel bridge deck, and the phenomenon that water seeps to corrode a steel plate of the bridge deck due to uneven compaction caused by deck resonance is prevented. The middle surface layer adopts fine grain type (13.2mm and 9.5mm) asphalt mixture, which is beneficial to reducing the void ratio and prolonging the service life of the bridge deck.
Specifically, the high-viscosity discontinuous semi-open graded asphalt mixture layer of the lower layer 150 consists of aggregate, filler, polymer fiber and second high-viscosity modified asphalt, the void ratio is 8% -12%, the second nominal particle size of the lower layer 150 is 19mm or 13.2mm, the third preset thickness is 30 mm-60 mm, the aggregate consists of coarse aggregate and fine aggregate, the coarse aggregate is diabase, basalt or limestone, the fine aggregate is limestone, the filler is limestone mineral powder or rock pulp mineral powder, and the polymer fiber is selected from one of the following substances: the second high-viscosity modified asphalt comprises No. 70 asphalt and a modifier, wherein the modifier accounts for 10-13% of the total mass of the second high-viscosity modified asphalt. The high-viscosity discontinuous semi-open graded asphalt mixture is used as the lower surface layer 150, so that the mixture has good deformation characteristics and excellent shear resistance and fatigue resistance, the generation and extension of cracks caused by the deformation of the steel bridge deck can be effectively inhibited, and the whole bridge deck structure has good anti-rutting and fatigue resistance.
In a high viscosity discontinuous semi-open graded asphalt mixture with a nominal maximum particle size of 19mm, the aggregate and filler grading is as follows:
in a high viscosity discontinuous semi-open graded asphalt mixture with a nominal maximum particle size of 13.2mm, the aggregate and filler grading is as follows:
the high-viscosity discontinuous semi-open graded asphalt mixture is used as the lower surface layer 150, the mineral aggregate graded composition in the asphalt mixture is discontinuous semi-open type, the realization of a stone embedding and extruding structure is guaranteed due to the absence of 3-5 mm grade aggregate, the effect of an internal friction angle in strength contribution is fully exerted (the high-viscosity modified asphalt provides sufficient cohesive force for strength, so that the shearing resistance of the mixture is greatly improved), the mixture also has sufficient deformability due to about 8% -12% of the semi-open graded asphalt, and the structure and the functionality of the bridge deck are perfectly unified. In addition, high-viscosity modified asphalt with the viscosity of more than 20000 Pa.s at 60 ℃ is adopted to replace common modified asphalt, and the addition of polymer fibers ensures the asphalt content of about 6.0 percent under the maximum nominal particle size of 19.0mm, the thickness of the asphalt film is nearly 18 mu m and far exceeds that of common asphalt concrete (8 mu m), the excellent anti-fatigue and anti-rutting performances are ensured, and the generation and extension of cracks caused by the deformation of a steel bridge deck are effectively inhibited.
Preferably, the upper layer 110 is an OGFC-13 type open-graded asphalt mixture layer, and has a first preset thickness of 40mm to 50 mm.
Specifically, the seal 120 is a modified emulsified asphalt layer, a hot asphalt layer, or a slurry seal. The adhesive layer 140 is a modified emulsified asphalt layer. The modified emulsified asphalt layer is used as the sealing layer 120 and the adhesive layer 140, so that the asphalt mixture layer has better cohesiveness, deformation resistance and shear resistance, pavement diseases can be greatly reduced, and the service life of the pavement is prolonged.
Preferably, the waterproof bonding layer 160 is an epoxy asphalt waterproof bonding layer and stone chips, and the spreading amount of the stone chips is 3mm to 5 mm. The interlayer bonding problem and the waterproof problem between the asphalt pavement layer and the steel bridge deck are solved, the pavement layer and the steel bridge deck are firmly combined, and slippage is avoided; the steel deck is not corroded by moisture.
Preferably, the anticorrosion layer 170 is an epoxy zinc-rich paint anticorrosion layer having: strong adhesive force and good impact resistance; broad oil and solvent resistance; excellent salt fog resistance; the coating is dried quickly and the binding force between paint film layers is strong. The deck 180 is a steel deck.
Specifically, the upper layer 110 of the OGFC-13 open-graded asphalt mixture is provided with third high-viscosity modified asphalt, the void ratio is 18-22%, the third high-viscosity modified asphalt is composed of No. 70 asphalt and a modifier, the modifier accounts for 10-14% of the total mass of the third high-viscosity modified asphalt, and the usage amount of the third high-viscosity modified asphalt is 4.6-5.2% of the upper layer 110 of the OGFC-13 open-graded asphalt mixture. The OGFC-13 open-graded asphalt mixture layer is used as the upper surface layer 110, so that the skid resistance of the pavement is effectively improved, the driving safety in rainy days is greatly improved, and meanwhile, the noise pollution in the driving process can be obviously reduced by the porosity of 18-22%.
Specifically, the middle surface layer 130 high-viscosity SMA asphalt mastic macadam mixture also comprises aggregates, fillers and polymer fibers, the void ratio is 2% -4%, the aggregates consist of coarse aggregates and fine aggregates, and the coarse aggregates are diabase, basalt or limestone; the fine aggregate is limestone, the filler is limestone mineral powder, and the polymer fiber is selected from one of the following substances: polyester fibers, polyacrylonitrile fibers, and mixed fibers of polyester fibers and polyacrylonitrile fibers.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a composite construction suitable for steel bridge face drainage is mated formation which characterized in that includes:
an upper surface layer, a sealing layer, a middle surface layer, a bonding layer, a lower surface layer, a waterproof bonding layer, an anticorrosive layer and a bridge floor which are sequentially paved from top to bottom,
the high-viscosity SMA asphalt mastic macadam mixed material layer of the middle surface layer is provided with first high-viscosity modified asphalt, the first nominal grain diameter of the middle surface layer is 13.2mm or 9.5mm, and the second preset thickness of the middle surface layer is 30 mm-50 mm;
the void ratio of the high-viscosity discontinuous semi-open graded asphalt mixture layer of the lower surface layer is 8% -12%, the second nominal particle size of the lower surface layer is 19mm, and the third preset thickness of the lower surface layer is 30 mm-60 mm.
2. The composite structure suitable for drainage pavement of steel bridge decks according to claim 1, wherein the lower surface layer further comprises:
the aggregate is composed of coarse aggregate and fine aggregate, the coarse aggregate is diabase, basalt or limestone, and the fine aggregate is limestone;
the filler is limestone mineral powder or magma mineral powder;
a polymer fiber selected from one of the following: polyester fibers, polyacrylonitrile fibers, and mixed fibers of polyester fibers and polyacrylonitrile fibers.
3. The composite structure suitable for drainage pavement of a steel bridge deck according to claim 1, wherein:
the upper surface layer is an OGFC-13 open-graded asphalt mixture layer and has a first preset thickness of 40-50 mm.
4. The composite structure suitable for drainage pavement of a steel bridge deck according to claim 1, wherein:
the sealing layer is a modified emulsified asphalt layer, a hot asphalt layer or a slurry sealing layer.
5. The composite structure suitable for drainage pavement of a steel bridge deck according to claim 1, wherein:
the adhesive layer is a modified emulsified asphalt layer.
6. The composite structure suitable for drainage pavement of a steel bridge deck according to claim 1, wherein:
the waterproof bonding layer is an epoxy asphalt waterproof bonding layer and stone chips, and the spreading amount of the stone chips is 3-5 mm.
7. The composite structure suitable for drainage pavement of a steel bridge deck according to claim 1, wherein:
the anticorrosive coating is an epoxy zinc-rich paint anticorrosive coating.
8. The composite structure suitable for drainage pavement of a steel bridge deck according to claim 3, wherein:
the OGFC-13 type open-graded asphalt mixture on the upper layer has third high-viscosity modified asphalt and the void ratio is 18-22%.
9. The composite structure suitable for drainage pavement of steel bridge decks according to claim 1, wherein the middle deck further comprises:
the aggregate is composed of coarse aggregate and fine aggregate, the coarse aggregate is diabase, basalt or limestone, and the fine aggregate is limestone;
the filler is limestone mineral powder;
a polymer fiber selected from one of the following: polyester fibers, polyacrylonitrile fibers, mixed fibers of polyester fibers and polyacrylonitrile fibers;
the void ratio of the high-viscosity SMA asphalt mastic macadam mixture of the middle surface layer is 2-4%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114214888A (en) * | 2021-12-30 | 2022-03-22 | 上海浦东路桥(集团)有限公司 | Drainage road surface composite construction suitable for heavy traffic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114214888A (en) * | 2021-12-30 | 2022-03-22 | 上海浦东路桥(集团)有限公司 | Drainage road surface composite construction suitable for heavy traffic |
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