CN205501732U - Flexible protection structure of ballastless track structural waterproof damping - Google Patents

Flexible protection structure of ballastless track structural waterproof damping Download PDF

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Publication number
CN205501732U
CN205501732U CN201620254060.0U CN201620254060U CN205501732U CN 205501732 U CN205501732 U CN 205501732U CN 201620254060 U CN201620254060 U CN 201620254060U CN 205501732 U CN205501732 U CN 205501732U
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China
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layer
waterproof
ballastless track
less
subgrade bed
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CN201620254060.0U
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Inventor
陈先华
赵国堂
杨国涛
杨军
蔡德钩
周文章
王萌
叶阳升
韩自力
张千里
闫宏业
崔颖辉
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Nanjing Boyard Environmental Engineering Co ltd
Southeast University
Railway Engineering Research Institute of CARS
China State Railway Group Co Ltd
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Nanjing Boyard Environmental Engineering Co ltd
Railway Engineering Research Institute of CARS
China Railway Corp
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Priority to CN2016100566244 priority
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2/00General structure of permanent way
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/26Bituminous materials, e.g. tar, pitch

Abstract

The utility model discloses a flexible protection structure of ballastless track structural waterproof damping, between ballastless track base plate bottom and foundation bed top layer / decking top surface, waterproof hookup layer and buffer protection layer are laid to the overall with. The utility model discloses comprehensive three -dimensional waterproof and wholeness is realized with the buffer protection layer in the hookup layer that utilizes full section to lay, utilize the dynamic modulus of the modified reinforcing agent adjustment asphalt concrete inoxidizing coating of special type, damping characteristic and deformation adaptability realize that rigidity is matchd and buffering damping function, utilize the modified reinforcing agent reinforcing asphalt concrete's of special type load diffusion capacity, tired durability and water -resistant harm ability, the effective solution has purt thick liquid between high -speed railway ballastless track road bed waterproof layer premature failure inefficacy and layer now, frozen swelling scheduling problem even comes to nothing, improve track lower part foundation structure's wholeness, the ride comfort, homogeneity and long term stability, provide good outrigger for the ballastless track board, fatigue life with the advancing the track board, it a long lasting protection scheme.

Description

A kind of flexible protective structure of ballastless track structure waterproof shock-absorption
Technical field
This utility model relates to the water-protected enclosure layer of newly built railway non-fragment orbit, is specifically related to the rail without the tiny fragments of stone, coal, etc. of a kind of waterproof shock-absorption Road Base flexible protective structure.
Background technology
In recent years, China Express Railway develops rapidly, roadbed as the basis of railroad track, its ride comfort, uniformity with Long-time stability are most important for guaranteeing bullet train safe operation.Existing ballastless track of high-speed railway structure is from top to bottom It is followed successively by: fragment-free track slab, bedplate (armored concrete), surface layer of subgrade bed (permeability graded broken stone), bottom layer of subgrade And subgrade soil;For between line with curb part, water-protected enclosure layer is set to realize protection to bedding.Practice have shown that, Water-protected enclosure layer is as the important barrier preventing rainfall and surface water from entering roadbed body, for guaranteeing the long-term of high ferro roadbed One of stability key link.
Existing ballastless track of high-speed railway road bed water-protected enclosure layer mainly uses cement concrete type material, mixed including element Solidifying soil, fiber concrete etc..In actual use, ballastless track of high-speed railway subgrade drainage cement concrete water-protected enclosure layer is deposited In problems such as cracking in various degree, breakage, efflorescence.For existing ballastless track structure, along with outside rigid waterproofing is sealed Closing a layer inefficacy for preventing local water function, surface water quickly penetrates into concrete bed and graded broken stone interlayer.Bedding or roadbed are long Depression of bearing force even ruckbildung can be there is when time is in higher moisture.Concrete pedestal and graded broken stone bedding table Elastic modelling quantity difference between Ceng is relatively big, and the erosion resistibility of non-cohesive graded broken stone is relatively poor, at row at a high speed Under the Loads that car causes, surface layer of subgrade bed easily produces and washes away formation water pocket, and then quickly causes disease of rising soil; Cold district in the winter time, the moisture content below injection plate also can produce the most serious frost heave, is just threatening high-speed railway Often, safe operation.Therefore, for existing ballastless track structure, develop long-acting three-dimensional waterproof measure and seem the most urgent.
By solving the problem that rigid waterproof layer is manifested in Practical Project, part way test have employed hot asphalt and mixes Closing the waterproof aspect of material, be layed in outside curb and between line, the self-compaction bituminous concrete declared such as utility model people is prevented The patents such as water seal layer.Being layed in the flexible water confining bed outside curb and between line, its function only considers waterproof requirement, Design of material does not considers relevant mechanics function, it is difficult to directly use.Tunneling boring asphalt concrete is used to improve The most complete water proofing property, it is possible to the shortcoming overcoming the rigidity stiffness transition of existing structure, plays prolongation fragment-free track slab And the effect of the fatigue life of surface layer of subgrade bed.But from the technology requirement of non-fragment orbit, sleeping bituminous concrete under needing system to solve The anti-accumulation permanent deformation of layer is key with collaborative work ability etc. with the differential deformation at adjacent materials interface and Rigidity Matching Structure problem, and bituminous concrete self water-proofing anticracking, temperature stability, anti-water damage and fatigue durability Etc. key issue, and the feature combining railway construction takes practicable technological measure.This this utility model quasi-solution just Key technical problem certainly.
Utility model content
Goal of the invention: the flexible protective structure of a kind of non-fragment orbit waterproof shock-absorption that this utility model provides, it is adaptable at a high speed The roadbed section of railway or Ballastless Track of Passenger Dedicated Railway or bridge section water-protected enclosure, can effectively solve existing high speed railway fragments-free rail Road Base waterproof layer premature failure lost efficacy, bridge section interlayer washes away the problems such as slurry, improved comprehensive long-acting guarantor for substructure Protect, provide suitable buffer shock-absorbing function for fragment-free track slab, improve the globality of structure, ride comfort, uniformity under rail And long-time stability, have easy construction, avoid safeguard advantage, be a kind of long-acting non-fragment orbit overcoat.
Technical scheme: for achieving the above object, the technical solution adopted in the utility model is:
A kind of flexible protective structure of ballastless track structure waterproof shock-absorption, bottom non-fragment orbit base plate with surface layer of subgrade bed/ Between floorings end face, overall with lays (tunneling boring laying) waterproof association layers and buffering protective layer, wherein waterproof association layers It is positioned at below buffer protection layer;If bottom is surface layer of subgrade bed, then require that waterproof association layers is in surface layer of subgrade bed graded broken stone Length of penetration is not less than 5mm;Adhesion strength between waterproof association layers and buffering protective layer is not less than 0.2MPa, waterproof Interlaminar shear strength between context layer and buffering protective layer is not less than 0.5MPa.
Concrete, described waterproof association layers, by splitting type emulsified asphalt soon or modified emulsifying asphalt spread forms, splits type emulsifying soon The consumption of Colophonium or modified emulsifying asphalt is 0.8~3.0kg/m20.8~3.0kg/m2
Concrete, described buffer protection layer is that the extraordinary of 4~12cm thickness strengthens bituminous concrete overcoat.
Concrete, the described extraordinary bituminous concrete overcoat that strengthens is mixed heat paving warp by special type enhancing bituminous concrete by heat Roller-compaction, the mass fraction that extraordinary enhancing bituminous concrete includes following component and each component is:
Described extraordinary strengthen the aggregate of each specification in bituminous concrete and be the basalt or stone processed through impact crushing Limestone gathers materials, clean, be dried, grain shape is good, grating is good.
The described extraordinary basalt that fine aggregate is rolling strengthened in bituminous concrete or limestone aggregates, clean, dry, Weather resistance, grating are good, particle diameter.
The described extraordinary filler strengthened in bituminous concrete is that limestone is through the levigate breeze obtained, the throughput of 0.075mm Being not less than 75%, plasticity index is not more than 4.
The described extraordinary Colophonium strengthened in bituminous concrete uses A level asphalt or the modification of needle penetration 4.5~9.0mm Colophonium, it is desirable to the elastic restoration ratio of modified pitch is not less than 80%.
The described extraordinary special modified reinforcing agent strengthened in bituminous concrete is for adjusting the elastic modelling quantity of bituminous concrete, resistance Damping characteristics and deformability, and strengthen the temperature stability of bituminous concrete, fatigue strength, ageing resistance, water resistant damage energy Power;Special modified reinforcing agent is obtained by the processing of nanometer synthesis technique by natural rubber and preferred high molecular polymer, outward appearance For dark-grey or black, the granule of a diameter of 2-6mm, density is 0.95~1.12g/mm3, elastic modelling quantity 1.0~1.6GPa, Softening interval is 120~150 DEG C, good dispersion;Special modified reinforcing agent direct plunges into during Asphalt concrete mixing Mix is carried out in mixing building.
Concrete, the described extraordinary bituminous concrete that strengthens uses volumetric method design, voidage be not more than 4.5% and mineral aggregate between Gap rate 11-16%, performance requirement is:
Infiltration coefficient is not more than 10-6M/s, surface texture depth is not less than 1.0mm, and Marshall stability is not less than 10kN, Low-temperature bending strain is not less than 0.25%, and linear contractive quotiety is not more than 26 μm/(m DEG C), and when 15 DEG C, dynamic modulus is not less than 10000MPa, when 40 DEG C, dynamic modulus is not less than 2000MPa, 0.1MPa when 40 DEG C, 10Hz, 1,000,000 times dynamic The accumulated deformation of compression creep is less than 1mm, 10Hz during room temperature, 200 μm fatigue lives more than 1,000,000 times, freeze thawing Ratio of split strength is not less than 85%.
The laying method of the flexible protective structure of a kind of ballastless track structure waterproof shock-absorption, comprises the steps:
(1) clean surface layer of subgrade bed/floorings end face, spray 0.8~3.0kg/m2Split type emulsified asphalt or modified emulsifying soon Colophonium, begins preparing for the construction of buffer protection layer after the not viscous wheel of Colophonium to be emulsified;
(2) the extraordinary bituminous concrete that strengthens needed for 4000 type asphalt mixing buildings or similar blending station mix is used, specifically Technique is: first puts into each particle diameter in mixing building in proportion and gathers materials, and is subsequently adding special modified reinforcing agent dry mixing at least 15s After, it being sequentially added into after filler and Colophonium mix again, total duration of mixing is no less than 60s, and drop temperature is maintained at 165 DEG C ~190 DEG C;
(3) special type using the dump truck transport mix of double back axle to become strengthens bituminous concrete, the compartment of dump truck Take thermal-insulating waterproof measure;
(4) in work surface to be laid, outside arranges baffle plate in advance as required, uses spade on construction machinery wheel path Spread thin layer drying fine sand;
(5) use overall with to pave or mode that framing paves pave on work surface to be laid and extraordinary strengthens bituminous concrete, The technique paved is: use band equalizer bar crawler asphalt paver continuously and smoothly pave, crawler asphalt paver without Method area of cloth uses manual synchronization's cloth, and crawler asphalt paver gait of march is maintained at 1~3m/min;If it is extraordinary Strengthen the thickness of bituminous concrete more than 8cm, the technique that employing layering paves;
(6) use steel roller machine and pneumatic-tired rollers to advance by ladder, 1/3 fold wheel mode and be combined rolling, have Body technology is: first, uses dual-steel wheel road roller immediately following crawler asphalt paver static pressure 2~4 times;Then, employing is double Bridge area whole process is used the mode of static pressure to roll 2~4 times by steel-wheeled vibrated roller, uses other regions and returns toward pressure of shaking The mode of static pressure rolls 2~4 times;Then, pneumatic-tired rollers are used to roll 2~4 times;Finally, it is down in surface temperature Final pressure smooth receipts optical processing was carried out with dual-steel wheel road roller before 82 DEG C;If the extraordinary thickness strengthening bituminous concrete exceedes 8cm, the technique using layered rolling;
(7) special type strengthening the seam crossings such as bituminous concrete and contact net basic, cable trough, sump uses joint-cutting to fill The mode of heat injection Colophonium processes, the heated bitumen composition irrigated and the extraordinary asphalt component phase strengthened in bituminous concrete With;
(8) the extraordinary bituminous concrete longitudinal seam that strengthens paved framing uses the mode of hot seam to process.
Beneficial effect: the flexible protective structure of a kind of non-fragment orbit waterproof shock-absorption that this utility model provides, with prior art Compare, there is following advantage:
1, bottom non-fragment orbit base plate and between surface layer of subgrade bed, tunneling boring is laid, and is mixed by the most impermeable Colophonium The multilamellar antiseepage of solidifying soil layer and emulsified asphalt layer is waterproof, utilizes the hydrophobicity of bituminous concrete to realize the quick of surface water simultaneously Drain, can be that roadbed provides the most three-dimensional waterproofing protection;
2, bottom non-fragment orbit base plate and between surface layer of subgrade bed, tunneling boring is laid, by adjusting asphalt concrete layer The parameters such as elastic modelling quantity and damping characteristic, can be that ballastless track structure provides suitable buffer shock-absorbing function;
3, bottom non-fragment orbit base plate and between surface layer of subgrade bed, tunneling boring is laid, and track plates pedestal waters construction after using, By the surface texture depth that waterproof association layers and asphalt concrete layer are bigger, strengthen interlayer shear resistance;
4, bottom non-fragment orbit base plate and between surface layer of subgrade bed, tunneling boring is laid, by optimizing asphalt concrete layer Deformation cooperative ability and crack resistance, enables inhomogeneous deformation that ballastless track structure is the biggest and unlikely generation cracking;
5, bottom non-fragment orbit base plate and between surface layer of subgrade bed, tunneling boring is laid, by adjusting asphalt concrete layer Load diffusivity and deformation cooperative ability so that the dynamic stress that train load causes is in fragment-free track slab and surface layer of subgrade bed Dispersion is more uniformly distributed, and improves the stress state of foundation bed structure, extends fragment-free track slab and the fatigue life of surface layer of subgrade bed;
6, bottom non-fragment orbit base plate and between surface layer of subgrade bed, tunneling boring is laid, structural thickness 4~12cm, totally thick Spend relatively thin, and thickness is adjustable, to on-the-spot strong adaptability;
7, bottom non-fragment orbit base plate and between surface layer of subgrade bed, tunneling boring is laid, and can make graded broken stone and pedestal coagulation The gross thickness thinning 8~15cm of soil;
8, bottom non-fragment orbit base plate and between surface layer of subgrade bed, tunneling boring is laid, and uses ripe bituminous concrete to execute Work technology implementation, it is advantageously ensured that uniformity and the stability of quality in site, and has good efficiency of construction;
9, by special modified reinforcing agent, bituminous concrete has excellent crack resistance, fatigue durability and self-healing ability, In addition there is suitable Laminate construction thickness, can be that ballastless track structure provides long-effective protection.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Figure includes: 1-surface layer of subgrade bed, 2-waterproof association layers, 3-buffer protection layer, and 4-non-fragment orbit base seat, 5-is without the tiny fragments of stone, coal, etc. Rail bed board.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is further described.
A kind of flexible protective structure of ballastless track structure waterproof shock-absorption, bottom non-fragment orbit base plate with surface layer of subgrade bed/ Between floorings end face, overall with lays (tunneling boring laying) waterproof association layers and buffering protective layer, wherein waterproof association layers It is positioned at below buffer protection layer;If bottom is surface layer of subgrade bed, then require that waterproof association layers is in surface layer of subgrade bed graded broken stone Length of penetration is not less than 5mm;Adhesion strength between waterproof association layers and buffering protective layer is not less than 0.2MPa, waterproof Interlaminar shear strength between context layer and buffering protective layer is not less than 0.5MPa.Table 1 is rail without the tiny fragments of stone, coal, etc. of the present utility model The performance standard of the flexible protective layer of road structurally waterproof vibration damping.
The performance standard of the flexible protective layer of table 1 ballastless track structure waterproof shock-absorption
As can be seen from the above table, the flexible protective layer that this utility model provides has excellent anti-fatigue performance and durability, And good deformation association is from ability, self-healing ability and erosion resistibility, Local Cracking does not affect its globality and use Function, can keep its performance for a long time, plays Expected Results.
Below in conjunction with an embodiment, this utility model is further detailed.
The present embodiment relates to central plain area and is building high ferro engineering, lays at the graded broken stone surface layer of subgrade bed tunneling boring completed The flexible protective layer of waterproof shock-absorption, its structure is as follows:
Waterproof association layers: 1.8kg/m2Cation-modified emulsified asphalt, bitumen content 54%, length of penetration 5~8mm;
Buffer protection layer: 6cm thickness special type strengthens bituminous concrete, uses volumetric method design, and each component ratio is as follows:
The aggregate of 10~20mm: when real estate limestone, 12.5%
The aggregate of 5~10mm: when real estate basalt, 45.1%
The aggregate of 3~5mm: when real estate basalt, 21.2%
The fine aggregate of 0~3mm: when real estate basalt, 13.4%
Filler: when real estate limestone dust, 2.8%
Colophonium: SBS modified pitch, needle penetration 6.8mm, elastic restoration ratio: 86%, consumption 4.1%
Extraordinary reinforcing agent: 0.2%
Implementing by mode described in the utility model, then carried out sampling detection at test section scene, result is as follows:
Adhesion strength: 0.33MPa
Interlaminar shear strength: 0.65MPa
Voidage: 3.5-4.5%
Void in mineral aggregate: 12.3%
Infiltration coefficient: 1.9 × 10-7m/s
Surface texture depth: 1.0-1.2mm
Marshall stability: 13-18kN
Low-temperature bending strains: 0.29-0.42%
Linear contractive quotiety: 19-23 μm/(m DEG C)
Dynamic modulus: 12000MPa (15 DEG C), 2400MPa (45 DEG C)
The accumulated deformation of dynamic compression creep when 45 DEG C (0.1MPa, 10Hz, 100 ten thousand times): 0.3mm
Fatigue life (10Hz, 15 DEG C, 200 μm): more than 1,650,000 times
Freeze-thaw split intensity: 90.2%.
The above is only preferred implementation of the present utility model, it should be pointed out that: for the ordinary skill of the art For personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve Also protection domain of the present utility model is should be regarded as with retouching.

Claims (3)

1. the flexible protective structure of a ballastless track structure waterproof shock-absorption, it is characterised in that: at non-fragment orbit base plate Between bottom and surface layer of subgrade bed/floorings end face, overall with lays waterproof association layers and buffering protective layer, wherein waterproof association layers It is positioned at below buffer protection layer;If bottom is surface layer of subgrade bed, then require that waterproof association layers is in surface layer of subgrade bed graded broken stone Length of penetration is not less than 5mm;Adhesion strength between waterproof association layers and buffering protective layer is not less than 0.2MPa, waterproof Interlaminar shear strength between context layer and buffering protective layer is not less than 0.5MPa.
The flexible protective structure of ballastless track structure waterproof shock-absorption the most according to claim 1, it is characterised in that: Described waterproof association layers, by splitting type emulsified asphalt soon or modified emulsifying asphalt spread forms, splits type emulsified asphalt or modified milk soon The consumption changing Colophonium is 0.8~3.0kg/m20.8~3.0kg/m2
The flexible protective structure of ballastless track structure waterproof shock-absorption the most according to claim 1, it is characterised in that: Described buffer protection layer is that the extraordinary of 4~12cm thickness strengthens bituminous concrete overcoat.
CN201620254060.0U 2016-01-27 2016-03-30 Flexible protection structure of ballastless track structural waterproof damping Active CN205501732U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105714621A (en) * 2016-01-27 2016-06-29 东南大学 Ballastless track-structured waterproof vibration-reducing flexible protecting structure and paving method thereof
CN108894062A (en) * 2018-05-11 2018-11-27 中国铁道科学研究院集团有限公司铁道建筑研究所 A kind of bituminous concrete ballastless track structure

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CN106868960B (en) * 2017-03-17 2018-10-02 中铁三局集团有限公司 High ferro ballastless track roadbed guarded drainage method for maintaining
CN106868959B (en) * 2017-03-17 2018-10-12 中铁三局集团有限公司 A kind of method that high ferro non-fragment orbit circuit is quickly repaired
CN109016752B (en) * 2018-08-03 2020-10-02 山东一诺威聚氨酯股份有限公司 Polyurethane elastomer composition for ballast track waterproof layer and preparation method thereof
CN109577108A (en) * 2019-01-09 2019-04-05 扬州大学 A kind of track plates of anti-stray current and preparation method thereof
CN111747682A (en) * 2020-03-12 2020-10-09 北京铁科特种工程技术有限公司 Asphalt graded broken stone for high-speed railway bed and production method thereof
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CN201459524U (en) * 2009-06-22 2010-05-12 中铁二院工程集团有限责任公司 Structure of vibration absorbing type ballastless track subgrade bed
CN201826227U (en) * 2010-09-30 2011-05-11 青岛爱尔家佳新材料有限公司 Composite damping coating structure of high-speed railway track bed
CN101979766B (en) * 2010-10-21 2012-07-11 中铁第四勘察设计院集团有限公司 Subgrade bed structure of high-speed railway red clay cutting
CN102561115A (en) * 2011-12-02 2012-07-11 合肥工业大学 Composite track noise-reducing shock-absorbing structure
WO2015114537A1 (en) * 2014-01-28 2015-08-06 Rangoni Cristiano Method for waterproofing railway bridges and waterproofing material for carrying out said method
CN105714621B (en) * 2016-01-27 2017-06-23 东南大学 The flexible protective structure and laying method of a kind of ballastless track structure waterproof shock-absorption

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105714621A (en) * 2016-01-27 2016-06-29 东南大学 Ballastless track-structured waterproof vibration-reducing flexible protecting structure and paving method thereof
CN108894062A (en) * 2018-05-11 2018-11-27 中国铁道科学研究院集团有限公司铁道建筑研究所 A kind of bituminous concrete ballastless track structure

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