CN203238541U - Cement concrete bridge deck pavement structure capable of being applied to extreme operating environment - Google Patents
Cement concrete bridge deck pavement structure capable of being applied to extreme operating environment Download PDFInfo
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- CN203238541U CN203238541U CN 201320204957 CN201320204957U CN203238541U CN 203238541 U CN203238541 U CN 203238541U CN 201320204957 CN201320204957 CN 201320204957 CN 201320204957 U CN201320204957 U CN 201320204957U CN 203238541 U CN203238541 U CN 203238541U
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Abstract
The utility model relates to the field of cement concrete bridge deck pavement, and particularly provides a cement concrete bridge deck pavement structure capable of being applied to an extreme operating environment. The cement concrete bridge deck pavement structure capable of being applied to the extreme operating environment is characterized in that a waterproof system, a multifunctional course, a bearing course and a wearing course are sequentially arranged above a processed cement concrete bridge deck from bottom to top, a modified emulsified asphalt bonding layer is arranged between the multifunctional course and the bearing course, a modified emulsified asphalt bonding layer is arranged between the bearing course and the wearing course, and a lateral single-particle-diameter pre-blend-macadam blind drainage ditch and a straight-discharge drainage hole are formed in the edge side of the bridge deck. Compared with the prior art, the cement concrete bridge deck pavement structure capable of being applied to the extreme operating environment strengthens a jointing function of a pavement course and a cement concrete panel and high-temperature stability and water resisting and drainage effect of a deck mixture, improves durability of the pavement course and has good popularization and application value.
Description
Technical field
The utility model relates to the Bridge Surface Paving by Cement field, and a kind of cement concrete bridge deck paving structure that can be applicable to extreme environment for use specifically is provided.
Background technology
Deck paving is an extremely complicated multidirectional stressed structure, and influence factor is intricate, and macro manifestations is also different.The destruction attribution of deck paving be material of paving course under the coupling of load and environment, the variation of mechanical characteristic (stress, strain) or the reduction of function, main manifestations is four aspects: 1. visco-plasticity permanent deformation; 2. fatigue cracking; 3. shear failure; 4. the broken and fracture of local assault.Especially under rainy at summer high temperature, the extreme environmental conditions such as winter severe cold is freezing, the molten corrosion of seawater salt and Heavy Traffic, the easier appearance of above-mentioned mode of failure.
The appearance of above-mentioned bridge deck damage form, both relevant with the comprehensive function of carload and water in the operation process, relevant with gather materials characteristic and the gradation design of compound again, the more important thing is that the mat formation thinking of layer design and dynamics and the system of construction control perfect degree has essence to the behavior in service of bridge deck pavement decisive action:
(1) load and weather conditions are on the impact of bridge deck damage
Investigation is found, the deck paving design load is huge with the difference of actual current load, the single shaft two-wheel group that at present bridge floor asphalt concrete pavement design adopts axle to carry 100kN is proof load, and in the actual current process, vehicle maximizes and the ratio of overload heavy-duty vehicle constantly increases, and the weigh vehicle of 200kN～300kN of single shaft axle is not within minority, and this has increased the weight of the stress burden that former design is mated formation undoubtedly, in the layer and interlayer shear stress be doubled and redoubled the destruction of the layer that accelerated to mat formation.
Weather conditions have direct impact to deck paving, and wherein the effect of temperature and precipitation is the most important.
(2) design of material is on the impact of bridge deck damage
The infiltration of moisture is a principal element that causes deck paving generation earlier period damage, after moisture infiltrates along mat formation slabbing seam or compound UNICOM space, can destroy the adhesive attraction between pitch and building stones, compound and the compound, when penetrating into asphalt surface course inside and cement concrete bridge deck and mating formation the bed boundary, the interface bond strength is reduced, make the layer of mating formation lose intensity and waterproof ability.From the existing standard of mating formation, be not difficult to find out, mainly be that material therefor, way and thickness etc. have been done explanation than regulation and the directiveness of principle to the discussion of layer structure of mating formation, do not give elaboration and arrange etc. such as Mechanical Calculation and Analysis, the drainage system of the layer of mating formation about concrete design theory and method, the appointment of the deck paving design and construction technical manual of system, standard is formulated extremely urgent.
(3) waterproof system or water-proof tack coat overall performance weakness is not set
For concrete slab since in construction and maintenance processes the wayward property of temperature and apply prestressed stretch-draw, bridge deck tend to occur fine fisssure defective to a certain degree.Find by the analysis to a large amount of bridge collapse origin causes of formation, the design of China's deck paving has been experienced one without water-proof tack coat-mulseal tack coat-heated bitumen, the process of coating and coiled material class water-proof tack coat-diversified water-proof binding system, the particularly design of the deck paving before 2000, the interlayer of mating formation water layer how in the air or only mat formation the layer with bridge deck combination interface place spread one deck plain asphalt or mulseal adhesion coating, be difficult to control and higher easily with oil mass, softening point is on the low side, high temperature is very easily softening and become lubricating layer, the mulseal water stability is poor simultaneously, in recent years domestic also have research unit to research and develop some such as polymer modified asphalt class (solvent-borne type or latex class), the flexible water binding materials such as polyurethane or epoxy resin asphalt class (solvent-borne type), construction thickness mostly is 1.0～1.5mm, such material is present in the pattern of fexible film mats formation between layer and the bridge deck, to waterproof that the bridge floor position that the crack exists is arranged still without positive effect too.And extremely easily by follow-up breakage in installation (taking away such as mixed material truck wheel).
(4) construction control is on the impact of bridge deck damage
The bridge floor processing mode is improper, fails to provide good boundary condition.
The interface processing mode is to guarantee to mat formation to connect good basis between layer and the bridge deck, current bridge floor processing mode commonly used mainly contains milling, dabbing, sandblast, ball blast etc., the operability of these construction technologies, mechanization degree, the characteristics of having nothing in common with each other in the aspects such as environmental factor, deck conditions after the processing is also different, in the current Surfacing Construction process, processing mode to bridge floor, treatment process, examination criteria (construction depth, roughness, uniformity) lacks specific aim and systematic regulation, cause the bridge floor Disposal quality very different, affected adhesive power and frictional resistance with the upper strata waterproofing course.
(5) anti-drainage system imperfection causes detail structure ponding or infiltration seriously
Water is one of main inducing of deck paving damage, brings out moisture behind layer cracking of mating formation and enters.Current highway asphalt pavement design criterion and construction technique normalizing etc. have only proposed the principle requirement to the waterproof system of deck paving, this waterproof body owner will refer to the setting of scratch coat and waterproofing course, " protection " problem that stresses extraneous water " after entering ", to preventing that extraneous water from entering front " dredging ", lacks corresponding detailed design.If it is improper that the drainage system of bridge floor arranges, the moisture that enters fails in time to discharge, and produces " bathtub effect ", the destruction of the layer that will certainly aggravate to mat formation.Therefore, perfect deck paving system and waterproof, drainage system are the key measures of guaranteeing the bridge deck pavement service performance.
Summary of the invention
The utility model is for above-mentioned the deficiencies in the prior art, and a kind of cement concrete bridge deck paving structure that can be applicable to extreme environment for use is provided, and has long-life, durable, high characteristics such as comfortable by force.
The technical scheme that its technical problem that solves the utility model adopts is: the cement concrete bridge deck paving structure that can be applicable to extreme environment for use, be characterized in, above treated water cement concrete bridge bridge deck, set gradually waterproof system, Multifunctional layered, bearing course and wearing layer from bottom to top, be provided with the modified emulsifying asphalt adhesion coating between Multifunctional layered and the bearing course and between bearing course and the wearing layer, side direction simple grain footpath premixed macadam weeper drain be set and directly let out the formula drain hole at the bridge floor avris.
Before mating formation, the cement concrete bridge deck plate is carried out dabbing or Shot Blasting.
Described waterproof system is made of water-proof tack coat and pitch premixed macadam layer, and water-proof tack coat and pitch premixed macadam layer are successively set on the bridge deck top from bottom to top.
Described water-proof tack coat adopts hot SBS modified bitumen or hot rubber powder modified asphalt, and hot SBS modified bitumen is according to 1.2～1.5kg/m
2Scope is carried out spread, and hot rubber powder modified asphalt is by 1.5～1.8kg/m
2Scope is carried out spread, after spread is complete, and spreading one deck pitch premixed macadam on water-proof tack coat, ballast grain sizes 3～8mm is through weight ratio 3～5 ‰ pitch premixings.
Described Multifunctional layered is the composite modified hard grades of bitumen glue of close water type sand; Bearing course high-modulus EME or modification SMA deck; Wearing layer is modification SMA fine grading deck.
For improving bridge floor lateral drainage effect, 2% transverse slope can be set at the wearing layer end face.
The cement concrete bridge deck paving structure that can be applicable to extreme environment for use of the present utility model is compared with existing technology, and has following outstanding beneficial effect:
(1) fully payes attention to the theory of waterproof, consider bridge floor Integrated using performance, in conjunction with the extreme environment service condition, appropriate design bridge floor Multifunctional layered structure embodies the comprehensive pavement performances such as bridge deck water-proof, anti-high and low-temp, endurance, the molten erosion of opposing seawater salt and driving Comfortable attractive;
(2) Multifunctional layered is taken into account Mi Shui (anti-sealing and salinity is seen through the layer of mating formation and enter into cement concrete, cement concrete and reinforcing bar are produced salt melt corrosion), the leveling effect, have high low temperature premium properties and the durable texts of antifatigue;
(3) multifunctional water-proofing layer asphaltmastic bituminous cements that compound adopts is composite modified hard grades of bitumen, this more pays attention to bridge deck water-proof effect and high low temperature pavement performance result of use, the common modified bitumen that middle upper layer SMA bituminous mixture adopts has more complicated better mechanics functional performance, and its techno-economic effect that brings can be put into practice and verify.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model cement concrete bridge deck paving structure.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to restriction of the present utility model.
Embodiment:
As shown in Figure 1: the utility model is in case the bridge deck pavement structure of aqueous systems 6, Multifunctional layered 5, bearing course 3, wearing layer 1, modified emulsifying asphalt adhesion coating 2, modified emulsifying asphalt adhesion coating 4 and lateral drainage french drain 8 completes.
Cement concrete bridge deck plate 7 is laid waterproof system 6, Multifunctional layered 5, bearing course 3 and wearing layer 1 from bottom to top successively after dabbing or Shot Blasting.Between Multifunctional layered 5 and bearing course 3, be provided with modified emulsifying asphalt adhesion coating 4.Between bearing course 3 and wearing layer 1, be provided with modified emulsifying asphalt adhesion coating 2.Side direction simple grain footpath premixed macadam weeper drain 8 is set and directly lets out formula drain hole 9 at the bridge floor avris.
Waterproof system 6 is made of water-proof tack coat and pitch premixed macadam layer.Water-proof tack coat adopts hot SBS modified bitumen or hot rubber powder modified asphalt, and hot SBS modified bitumen is according to 1.2～1.5kg/m
2Scope is carried out spread, and hot rubber powder modified asphalt is by 1.5～1.8kg/m
2Scope is carried out spread, after spread is complete, and spreading one deck pitch premixed macadam on water-proof tack coat, ballast grain sizes 3～8mm is through weight ratio 3～5 ‰ pitch premixings.
Multifunctional layered 5, adopt close water type composite modified hard grades of bitumen glue sand (3cm), its binder (composite modified asphalt) with matrix pitch, SBS modifier and natural ganoine bitumen according to a certain percentage, order blending, swelling grow, high speed shear processes.Matrix pitch and SBS modifier are mixed to join according to the weight ratio of 95%:5% and are formed the SBS modified bitumen, are blended into composite modified asphalt with the Qing Chuan kir again, and the mixed ratio example (interior volume) of Qing Chuan kir in composite modified asphalt is 7%.
Wearing layer 1 SMA-10(4cm), is made cementitious matter with the SBS modified bitumen, and the nominal maximum particle diameter is the interruption compact compound of 9.5mm.
Modified emulsifying asphalt adhesion coating 2, modified emulsifying asphalt adhesion coating 4: spread quantity is 0.3～0.6L/m
2, be used for strengthening the bituminous mixture interlaminar bonding.
Lateral drainage french drain 8, directly let out formula drain hole 9: adopt vertical sluicing edge drainage, side direction simple grain footpath premixed macadam weeper drain width is 15cm, and the degree of depth is filled ballast grain sizes 10-20mm to Multifunctional layered 5 tops, and rubble is through weight ratio 2.5% mulseal premixing; Do baffle plate in when construction layer of mating formation with the plank of wide 20cm, thick 6cm or 8cm, reserve the groove of rubble french drain, carry out before wearing layer 1 is constructed that rubble fills, compacting, and the spread modified emulsifying asphalt.
Above-described embodiment is the more preferably specific embodiment of the utility model, and the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacement all should be included in the protection domain of the present utility model.
Claims (6)
1. can be applicable to the cement concrete bridge deck paving structure of extreme environment for use, it is characterized in that above treated water cement concrete bridge bridge deck, set gradually waterproof system, Multifunctional layered, bearing course and wearing layer from bottom to top, be provided with the modified emulsifying asphalt adhesion coating between Multifunctional layered and the bearing course and between bearing course and the wearing layer, side direction simple grain footpath premixed macadam weeper drain be set and directly let out the formula drain hole at the bridge floor avris.
2. the cement concrete bridge deck paving structure that can be applicable to extreme environment for use according to claim 1, it is characterized in that, described waterproof system is made of water-proof tack coat and pitch premixed macadam layer, and water-proof tack coat and pitch premixed macadam layer are successively set on the bridge deck top from bottom to top.
3. the cement concrete bridge deck paving structure that can be applicable to extreme environment for use according to claim 1 is characterized in that, described Multifunctional layered is the composite modified hard grades of bitumen glue of close water type sand.
4. the cement concrete bridge deck paving structure that can be applicable to extreme environment for use according to claim 1 is characterized in that, described bearing course is high-modulus EME or modification SMA deck.
5. the cement concrete bridge deck paving structure that can be applicable to extreme environment for use according to claim 1 is characterized in that, described wearing layer is modification SMA fine grading deck.
6. the cement concrete bridge deck paving structure that can be applicable to extreme environment for use according to claim 1 is characterized in that, it is 2% transverse slope that the wearing layer end face is provided with the gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320204957 CN203238541U (en) | 2013-04-22 | 2013-04-22 | Cement concrete bridge deck pavement structure capable of being applied to extreme operating environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320204957 CN203238541U (en) | 2013-04-22 | 2013-04-22 | Cement concrete bridge deck pavement structure capable of being applied to extreme operating environment |
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| CN203238541U true CN203238541U (en) | 2013-10-16 |
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| CN 201320204957 Expired - Fee Related CN203238541U (en) | 2013-04-22 | 2013-04-22 | Cement concrete bridge deck pavement structure capable of being applied to extreme operating environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537471A (en) * | 2019-01-15 | 2019-03-29 | 中冶华天工程技术有限公司 | Harmful influence across sensitive water body bridge reveals emergent treatment system and construction method |
| CN109577183A (en) * | 2018-12-17 | 2019-04-05 | 山东汇通建设集团有限公司 | The anti-ponding structure in overhead bridge floor edge and construction |
-
2013
- 2013-04-22 CN CN 201320204957 patent/CN203238541U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577183A (en) * | 2018-12-17 | 2019-04-05 | 山东汇通建设集团有限公司 | The anti-ponding structure in overhead bridge floor edge and construction |
| CN109537471A (en) * | 2019-01-15 | 2019-03-29 | 中冶华天工程技术有限公司 | Harmful influence across sensitive water body bridge reveals emergent treatment system and construction method |
| CN109537471B (en) * | 2019-01-15 | 2024-04-05 | 中冶华天工程技术有限公司 | Dangerous chemical leakage emergency treatment system crossing sensitive water bridge and construction method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140422 |