CN101914894A - New pavement structure suitable for multi-tower continuous span suspension bridge with ultra-long span and large flexibility - Google Patents
New pavement structure suitable for multi-tower continuous span suspension bridge with ultra-long span and large flexibility Download PDFInfo
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- CN101914894A CN101914894A CN 201010236386 CN201010236386A CN101914894A CN 101914894 A CN101914894 A CN 101914894A CN 201010236386 CN201010236386 CN 201010236386 CN 201010236386 A CN201010236386 A CN 201010236386A CN 101914894 A CN101914894 A CN 101914894A
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Abstract
The invention relates to a pavement structure suitable for a multi-tower continuous span suspension bridge with ultra-long span and large flexibility, which is characterized by comprising a steel bridge deck (1), an anti-corrosion layer (2), a modified cast asphalt concrete layer (3) and a thermosetting resin modified asphalt concrete layer (4), wherein the anti-corrosion layer (2), the modified cast asphalt concrete layer (3) and the thermosetting resin modified asphalt concrete layer (4) are sequentially arranged above the steel bridge deck (1); the anti-corrosion layer (2) is bonded with the modified cast asphalt concrete layer (3) through a waterproof bonding layer (5); and the modified cast asphalt concrete layer (3) is bonded with the thermosetting resin modified asphalt concrete layer (4) through a bonding layer (6). The pavement structure has excellent properties in the aspects of strength, coordination deformation, low-temperature crack resistance, high-temperature stability, fatigue property, water tightness, ride comfort and the like, can improve the ride comfort of pavement, and can prolong the service life of the pavement structure.
Description
Technical field
The present invention relates to a kind of paving structure pattern that super large is striden the big multi-tower continuous suspension bridge bridge floor of striding of flexibility in footpath that is used for, belong to the technical field of Communication and Transportation Engineering.
Background technology
Stride the Jiang Yuehai epoch along with world's bridge construction steps into, over-long span directly becomes the main direction of bridge construction.The multi-tower continuous suspension bridge of striding is on the basis of traditional two tower list main span suspension bridges, by setting up the mode of one or more inter-chamber towers, realizes that the continuous overlength of suspension bridge is crossed over.Multi-tower continuously stride the flexibility that suspended-cable structure has aggravated bridge deck.The permission deflection span ratio of beam bridge should be less than 1/600, the deflection span ratio of two tower suspension bridges is generally about 1/300, flexible much larger than beam bridge, and multi-tower continuous deflection span ratio of striding suspension bridge is about 1/250, its flexibility is bigger, this makes the structure behavioral trait of the layer of mating formation complicated more, and its stress is compared all with traditional bridge type with deformation behavior, fatigue properties etc., and bigger variation can take place.Therefore, for the multi-tower continuous suspension bridge structure of striding, the characteristics from the continuously big flexibility of super-span work out a kind of novel paving structure pattern that is suitable for multi-tower continuous bridge construction characteristics of striding and seem very necessary.
At present, the paving structure pattern that mainly adopts of traditional two tower list main span suspension bridges has: double-deck epoxy asphalt concrete paving structure, double-deck pouring formula asphalt concrete pavement structure, individual layer epoxy asphalt concrete pavement structure, individual layer cast asphalt concrete paving structure, lower floor's cast asphalt concrete add upper strata modified bitumen close-graded concrete pavement structure etc.Yet, in use more or less all there is disease situation in various degree in these paving structures, as fatigue cracking, rut, delamination, hole, hole etc., this mainly is because in the material design process, does not select according to the function of use of each layer that suitable pavement material caused for use.For example, adopt cast asphalt concrete or modified bitumen close-graded concrete the rut phenomenon just to take place easily, and adopt epoxy asphalt concrete cracking phenomena just to take place easily under the large deformation effect as paving structure lower floor as the paving structure upper strata.For longer gentleer multi-tower continuous striding for the suspension bridge, the instructions for use of its paving structure is harsher than traditional two tower list main span suspension bridges.
Summary of the invention
Technical problem: the invention provides a kind of paving structure pattern that super large is striden the big multi-tower continuous suspension bridge bridge floor of striding of flexibility in footpath that is suitable for, promptly lower floor's modified version cast asphalt concrete adds the paving structure pattern of upper strata thermosetting resin modified asphalt concrete.This paving structure pattern all has excellent performance at aspects such as intensity, cooperative transformation, low-temperature cracking-resistance, high-temperature stability, fatigue behaviour, dense water and road-abilities, can improve the ride comfort of mating formation, and improves the length of service of paving structure.
Technical scheme: for solving the problems of the technologies described above, a kind of super large that is suitable for provided by the invention is striden the big multi-tower continuous new pavement structure of striding suspension bridge of flexibility in footpath and is: it comprises steel bridge deck, the anticorrosive coat that sets gradually, modified version cast asphalt concrete layer and thermosetting resin modified asphalt concrete layer above steel bridge deck; Bonding between described anticorrosive coat and the modified version cast asphalt concrete layer by water-proof tack coat, bonding between described modified version cast asphalt concrete layer and the described thermosetting resin modified asphalt concrete layer by tack coat.
Preferably, described anticorrosive coat thickness is more than or equal to 100 μ m; The thickness of described modified version cast asphalt concrete layer is 25～30mm; The thickness of described thermosetting resin modified asphalt concrete layer is 25～30mm; The thickness of described water-proof tack coat is 0.6～0.8mm; The thickness of described tack coat is 0.4～0.6mm.
Preferably, in the described modified version cast asphalt concrete layer cast asphalt concrete be by binder with gather materials that to mix by mass ratio be 7～10: 100 form; Described binder is to mix at 60: 40 by Trinida lake asphalt and ethylene-butadiene-styrene block copolymerization rerum natura pitch by mass ratio;
The thermosetting resin modified asphalt concrete is to be 6～8 by the thermosetting resin modified asphalt binders with gathering materials by mass ratio in the described thermosetting resin modified asphalt concrete layer (4): 100 mix; Described thermosetting resin modified asphalt binders by resin be heated to after 82 ℃-92 ℃ with the binder that is heated to 125 ℃-135 ℃ be to mix at 100: 291 with the matrix pitch that contains curing compound by mass ratio;
Described water-proof tack coat adopts the thermosetting resin modified bituminous binder to make, described thermosetting resin modified bituminous binder by resin be heated to after 87 ± 5 ℃ with the binding material that is heated to 150 ± 5 ℃ be to mix at 100: 245.1 with the matrix pitch that contains curing compound by mass ratio, and adopt the raw material components of different formulations with the thermosetting resin modified asphalt binders;
Described bonding layer material is identical with water-proof tack coat;
The material of described anticorrosive coat adopts the epoxy zinc-rich lacquer.
Beneficial effect: new pavement structure of the present invention, adopt the paving structure type of " anticorrosive coat add water-proof tack coat add modified version cast asphalt concrete layer add tack coat and add thermosetting resin modified asphalt concrete layer ", wherein, anticorrosive coat can prevent the steel bridge deck corrosion, guarantee that steel bridge deck has the work plane of neat and tidy, increased steel bridge deck and the adhesive property of mating formation; Water-proof tack coat can prevent the moisture intrusion with the protection steel bridge deck, and well-bonded with bridge deck, the shearing that provides enough adhesive power to be caused with opposing variations in temperature, loaded vehicle brake; Lower floor's modified version cast asphalt concrete layer is guaranteeing that 70 celsius temperatures do not occur under the prerequisite of rut, can chase after well from steel plate deformed, do the time spent at steel bridge deck with mat formation and play the effect that strain is coordinated between the upper strata in large deformation, and void content approaches zero, have waterproof action concurrently; Tack coat plays mat formation the up and down synergy of layer of assurance, bears the load action of vehicle jointly; Upper strata thermosetting resin modified asphalt concrete is a wearing layer, has very high intensity and anti-rut performance, directly with during wheel load contacts, any high temperature rheology can not take place be out of shape, and has enough anti-low-temperature bending ability and fatigue behaviour simultaneously.
The present invention program has improved the bulk deformation coordination ability and the anti-fatigue performance of the layer of mating formation, and obtained the overall balance of the aspects such as low-temperature cracking-resistance, high temperature stability performance and useful life longevity of structure, meet super large fully and stride the big multi-tower continuous instructions for use of striding the suspension bridge deck paving of flexibility in footpath.
Description of drawings
Fig. 1 is the big multi-tower continuous structural representation of striding the new pavement structure of suspension bridge of flexibility in over-long span footpath that is suitable for provided by the invention; Have among the figure: steel bridge deck 1, anticorrosive coat 2, modified version cast asphalt concrete layer 3, thermosetting resin modified asphalt concrete layer 4, water-proof tack coat 5, tack coat 6.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, provided by the inventionly be suitable for anticorrosive coat 2, modified version cast asphalt concrete layer 3 and the thermosetting resin modified asphalt concrete layer 4 that the big multi-tower continuous new pavement structure of striding suspension bridge of flexibility in over-long span footpath comprises steel bridge deck 1, sets gradually above steel bridge deck 1; Bonding between described anticorrosive coat 2 and the modified version cast asphalt concrete layer 3 by water-proof tack coat 5, bonding between described modified version cast asphalt concrete layer 3 and the described thermosetting resin modified asphalt concrete layer 4 by tack coat 6.
Described anticorrosive coat 2 thickness are more than or equal to 100 μ m; The thickness of described modified version cast asphalt concrete layer 3 is 25～30mm; The thickness of described thermosetting resin modified asphalt concrete layer 4 is 25～30mm; The thickness of described water-proof tack coat 5 is 0.6～0.8mm; The thickness of described tack coat 6 is 0.4～0.6mm.
In the described modified version cast asphalt concrete layer 3 cast asphalt concrete be by binder with gather materials that to mix by mass ratio be 7～10: 100 form; Described binder is to mix at 60: 40 by Trinida lake asphalt and SBS (ethylene-butadiene-styrene block copolymer) property pitch by mass ratio.
Thermosetting resin modified asphalt concrete layer 4 in the described upper strata of mating formation is to be mixed with gathering materials by the thermosetting resin modified asphalt binders, and mixed proportion is 6～8: 100, in weight portion; Described thermosetting resin modified asphalt binders is heated to after 87 ± 5 ℃ by resin (A component) and mixes with the matrix pitch (Bbinder component) that contains curing compound with the binder that is heated to 130 ± 5 ℃, and mixed proportion is 100: 291, in weight portion.
Thermosetting resin modified bituminous binder in the described water-proof tack coat is heated to after 87 ± 5 ℃ by resin (A component) and mixes with the matrix pitch (Bbond component) that contains curing compound with the binding material that is heated to 150 ± 5 ℃, and adopt the raw material components of different formulations with the thermosetting resin modified asphalt binders, mixed proportion is 100: 245.1, in weight portion.
Described tack coat 6 materials are identical with water-proof tack coat 5;
The material of described anticorrosive coat 2 adopts the epoxy zinc-rich lacquer.
New pavement structure in the present embodiment, every technical indicator all can satisfy to stride the footpath flexibility is multi-tower continuous greatly as super large strides the instructions for use that suspension bridge is mated formation layer.Concrete testing result sees Table 7.
Provided by the inventionly the invention provides a kind of paving structure pattern that super large is striden the big multi-tower continuous suspension bridge bridge floor of striding of flexibility in footpath, i.e. paving structure pattern of lower floor's modified version cast asphalt concrete+upper strata thermosetting resin modified asphalt concrete of being suitable for.This paving structure pattern all has excellent performance at aspects such as intensity, cooperative transformation, low-temperature cracking-resistance, high-temperature stability, fatigue behaviour, dense water and road-abilities, can improve the ride comfort of mating formation, and improves the length of service of paving structure.
The super large that the present invention relates to is striden the footpath, and big flexibility is multi-tower continuous strides in the suspension bridge new pavement structure, and every raw material need satisfy the requirement of table 1～table 4.
The epoxy zinc-rich anticorrosive coat need satisfy the requirement of table 1 among the present invention.
The technical requirements of table 1 epoxy zinc-rich lacquer
| Technical indicator | Technical requirements | Test method |
| Surface drying time (25 ℃) (min) | ≤15 | JC/T975-2005 |
| Hardening time (25 ℃) (d) fully | ≤7 | JC/T975-2005 |
| Film thickness (μ m) | ≥100 | TB/T1527-2004 |
| With steel plate adhesion strength (25 ℃) (MPa) | ≥5.0 | GB/T5210-85 |
Technical requirements to Trinida lake asphalt (TLA), SBS (ethylene-butadiene-styrene block copolymer) modified bitumen and mixed binder in the lower floor's modified version cast asphalt concrete of mating formation among the present invention sees Table 2.
The technical requirements of binder of table 2 modified version cast asphalt concrete
Technical requirements to A component in the upper strata thermosetting resin modified asphalt binders of mating formation among the present invention sees Table 3, and the A component requires identical therewith in the thermosetting resin modified bituminous binder of water-proof tack coat and tack coat.
The technical requirements of table 3A component
| Technical indicator | Technical requirements | Test method |
| Viscosity (25 ℃) (10-3Pas) | 6000～12000 | GB/T12007.4-1989 |
| Epoxide equivalent (the material gram number that contains 1 gram epoxide equivalent) | 185～210 | GB/T?4612-1984 |
| Color (Gardner (Gardner)) | ≤4 | GB/T12007.1-1989 |
| Water content (%) | ≤0.05 | ASTM?D?1744 |
| Flash-point (opening agar diffusion method) (℃) | ≥200 | ASTM?D?92 |
| Proportion (25 ℃) | 1.16±0.03 | ASTM?D?1475 |
| Outward appearance | Transparent amber shape | Visual |
Technical requirements to (the binder matrix pitch that the contains curing compound) component of Bbinder in the upper strata thermosetting resin modified asphalt binders of mating formation and water-proof tack coat and tack coat thermosetting resin modified bituminous binder Bbond (the binder matrix pitch that contains curing compound) component among the present invention sees Table 4.
The technical requirements of table 4B component
Technical requirements to mat formation upper strata thermosetting resin modified asphalt binders and water-proof tack coat and tack coat thermosetting resin modified asphalt binders among the present invention sees Table 5.
The technical requirements of table 5 thermosetting resin modified asphalt binders and binding material
The present invention requires to see Table 6 to the aggregate grading of thermosetting resin modified asphalt concrete in the paving structure and modified version cast asphalt concrete.
Table 6 thermosetting resin modified asphalt concrete and the requirement of modified version cast asphalt concrete mineral aggregate gradation
New pavement structure in the present embodiment, every technical indicator all can satisfy to stride the footpath flexibility is multi-tower continuous greatly as super large strides the instructions for use that suspension bridge is mated formation layer.Concrete testing result sees Table 7.
Table 7 new pavement structure layer pavement performance testing result and technical requirements
Note: * composite construction: the test specimen that is adopted in the process of the test according to the present invention in the structural shape of new pavement structure pattern equal thickness ratio moulding " lower floor's modified version cast asphalt concrete+upper strata thermosetting resin modified asphalt concrete ".
Claims (6)
1. one kind is suitable for the big multi-tower continuous paving structure of striding suspension bridge of flexibility in over-long span footpath, it is characterized in that: it comprises steel bridge deck (1), the anticorrosive coat (2), modified version cast asphalt concrete layer (3) and the thermosetting resin modified asphalt concrete layer (4) that set gradually in steel bridge deck (1) top; Bonding between described anticorrosive coat (2) and the modified version cast asphalt concrete layer (3) by water-proof tack coat (5), bonding between described modified version cast asphalt concrete layer (3) and the described thermosetting resin modified asphalt concrete layer (4) by tack coat (6).
2. the super large that is suitable for according to claim 1 is striden the big multi-tower continuous new pavement structure of striding suspension bridge of flexibility in footpath, and it is characterized in that: described anticorrosive coat (2) thickness is more than or equal to 100 μ m; The thickness of described modified version cast asphalt concrete layer (3) is 25～30mm; The thickness of described thermosetting resin modified asphalt concrete layer (4) is 25～30mm; The thickness of described water-proof tack coat (5) is 0.6～0.8mm; The thickness of described tack coat (6) is 0.4～0.6mm.
3. the super large that is suitable for according to claim 1 is striden the big multi-tower continuous new pavement structure of striding suspension bridge of flexibility in footpath, it is characterized in that: in the described modified version cast asphalt concrete layer (3) cast asphalt concrete be by binder with gather materials that to mix by mass ratio be 7～10: 100 form; Described binder is to mix at 60: 40 by Trinida lake asphalt and ethylene-butadiene-styrene block copolymerization rerum natura pitch by mass ratio.
4. the super large that is suitable for according to claim 1 is striden the big multi-tower continuous new pavement structure of striding suspension bridge of flexibility in footpath, it is characterized in that: the thermosetting resin modified asphalt concrete is to be 6～8 by the thermosetting resin modified asphalt binders with gathering materials by mass ratio in the described thermosetting resin modified asphalt concrete layer (4): 100 mix; Described thermosetting resin modified asphalt binders by resin be heated to after 82 ℃-92 ℃ with the binder that is heated to 125 ℃-135 ℃ be to mix at 100: 291 with the matrix pitch that contains curing compound by mass ratio.
5. the super large that is suitable for according to claim 1 is striden the big multi-tower continuous new pavement structure of striding suspension bridge of flexibility in footpath, it is characterized in that: described water-proof tack coat (5) and tack coat (6) all adopt the thermosetting resin modified bituminous binder to make, described thermosetting resin modified bituminous binder by resin be heated to after 87 ± 5 ℃ with the binding material that is heated to 150 ± 5 ℃ be to mix at 100: 245.1 with the matrix pitch that contains curing compound by mass ratio, and adopt the raw material components of different formulations with the thermosetting resin modified asphalt binders.
6. the super large that is suitable for according to claim 1 is striden the big multi-tower continuous new pavement structure of striding suspension bridge of flexibility in footpath, and it is characterized in that: the material of described anticorrosive coat (2) adopts the epoxy zinc-rich lacquer.
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| CN 201010236386 CN101914894A (en) | 2010-07-26 | 2010-07-26 | New pavement structure suitable for multi-tower continuous span suspension bridge with ultra-long span and large flexibility |
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| CN 201010236386 CN101914894A (en) | 2010-07-26 | 2010-07-26 | New pavement structure suitable for multi-tower continuous span suspension bridge with ultra-long span and large flexibility |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924495A (en) * | 2013-01-15 | 2014-07-16 | 上海市政工程设计研究总院（集团）有限公司 | Small and medium-sized steel bridge deck pavement system and implementation method |
| CN107237256A (en) * | 2017-08-09 | 2017-10-10 | 上海市市政规划设计研究院 | Long-acting endurance bridge deck pavement structure |
| CN113109553A (en) * | 2021-04-13 | 2021-07-13 | 长安大学 | Asphalt binder fatigue resistance performance evaluation method and system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103924495A (en) * | 2013-01-15 | 2014-07-16 | 上海市政工程设计研究总院（集团）有限公司 | Small and medium-sized steel bridge deck pavement system and implementation method |
| CN107237256A (en) * | 2017-08-09 | 2017-10-10 | 上海市市政规划设计研究院 | Long-acting endurance bridge deck pavement structure |
| CN113109553A (en) * | 2021-04-13 | 2021-07-13 | 长安大学 | Asphalt binder fatigue resistance performance evaluation method and system |
| CN113109553B (en) * | 2021-04-13 | 2023-04-18 | 长安大学 | Asphalt binder fatigue resistance performance evaluation method and system |
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Open date: 20101215 |