CN104109989A - Method for curing double-block ballastless tracks in extreme environments - Google Patents
Method for curing double-block ballastless tracks in extreme environments Download PDFInfo
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- CN104109989A CN104109989A CN201310164931.0A CN201310164931A CN104109989A CN 104109989 A CN104109989 A CN 104109989A CN 201310164931 A CN201310164931 A CN 201310164931A CN 104109989 A CN104109989 A CN 104109989A
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Abstract
The invention discloses a method for curing double-block ballastless tracks in extreme environments. The method for curing the double-block ballastless tracks in the extreme environments has the advantages that the double-block ballastless tracks are cured in a curing agent, water-saving moisture retention curing film, geotextile, curing shed and fan heater combined mode, and accordingly cracking of supporting layers of the double-block ballastless tracks and ballast bed plates can be effectively controlled; conditions that environments are polluted by curing materials due to gale can be reduced, a water-saving film and geotextiles cannot be easily destroyed by the gale, the curing materials can be reused to the greatest extent, material wastage can be reduced, accordingly, excellent curing quality and high curing efficiency can be guaranteed under severe environmental conditions, and environments can be protected under the severe environmental conditions.
Description
Technical field
The present invention relates to a kind of maintenance process of non-fragment orbit, specifically a kind of double-block type ballastless track is in the maintenance process of extreme environment.
Background technology
Roadbed double-block type ballastless track structure is: supporting bed+road bed board, supporting bed and road bed board are that gradation is built.Under home weather conditions, the maintenance process of conventional non-fragment orbit is: should before the water volatilization in internal construction, just start maintenance.Its maintenance method is: after stripping, continue to adopt geotextiles to cover watering to concrete and carry out moist maintenance.After quadric-plastering 2～3 hours, first cover geotextiles, geotextiles is wider than railway roadbed 50cm, with soil or the lumps of wood, geotextiles compacting is obturaged, and to geotextiles watering, makes geotextiles drenched, then in geotextiles, covers thick plastic sheeting, prevents moisture evaporation.
But to being located in Gobi Desert Terrain (as domestic in Gansu, China province Guazhou County), dry, day and night temperature is large, spring, autumn windy sand, summer is very brief, winter is extremely cold.Mean annual precipitation 52.2mm, annual mean evaporation capacity 2567.3mm, 42.8 DEG C of Extreme Maximum Temperatures, the extreme lowest temperature-35.4 DEG C, maximum wind velocity 27m/s.Under the Gobi Desert Terrain environment of severe drought lack of water, the double-block type ballastless track concrete construction under Gobi Desert Terrain environment both at home and abroad has no relevant report, still belongs to the first time.
Summary of the invention
The object of the invention is for extremely cold, day and night temperature is large, under the Gobi Desert Terrain district setting of strong wind and severe drought lack of water, the maintenance process of a kind of double-block type ballastless track at extreme environment is provided, this maintenance process adopts the maintenance method of curing agent+water-saving moisturizing maintenance mould+geotextiles+maintenance canopy+warm braw, effectively control the cracking of double-block ballastless track bed board, realize to greatest extent the recycling of conserving material, also reduced the conserving material environmental pollution problem causing because of strong wind simultaneously, thereby form a kind of non-fragment orbit maintenance method of efficient economizing and environmental protection under severe environmental conditions.
Technical scheme of the present invention is: a kind of double-block type ballastless track is in the maintenance process of extreme environment; It is characterized in that:
(1), build ballastless track bed board concrete;
(2), creative activity maintenance canopy or operation canopy;
(3), activity maintenance canopy or operation canopy are arranged on concrete ballastless track bed board, one end of steam heating pipe is stretched in maintenance canopy, and the other end is fixed on warm-air drier;
(4), start warm-air drier, heating installation is in steam heating pipe is conveyed into maintenance canopy;
(5), press polish concrete surface: after concrete enters mould in half an hour, complete slightly floatingly to entering mould the reinforcement of concrete wood patter, with steel spatula, mould inner concrete is smeared to 2-4 time again after 1-2 hour; For preventing that concrete surface dehydration from producing fine cracks, enter after mould 3-4h at concrete, with steel spatula to the mould inner concrete press polish concrete surface of again wiping one's face;
(6), spraying curing agent: with pointing flicking concrete surface without finger mark, lose swim, when tack-free, spray curing agent (XD-1004) with sprayer at the concrete surface of press polish and carry out maintenance, curing agent consumption is: 0.3～0.4kg/m2, and thickness is not less than 0.2mm; After brushing, form layer protecting film at concrete surface, guarantee that the moisture of inside concrete is difficult for running off.After concrete initial set, concrete surface is fully sprinkled water, increase the moisture of inside concrete, make film be close to concrete surface simultaneously.Finally cover the geotextiles insulation of sprinkling water, geotextiles covering and heat insulating is no less than 7 days;
(7), bedding water-saving moist keeping maintenance film: after concrete surface spraying curing agent is completed, can lay (covering) water-saving moist keeping maintenance film.Water-saving moisturizing maintenance mould is ajusted and is placed on bed board face, and the water-saving moist keeping maintenance film wide that road bed board covers is 3.9 meters; On water-saving moist keeping maintenance film, sprinkle water, make water-saving moist keeping maintenance film surface free water reach 3-4mm (free water is the moisture only sticking on water-saving moist keeping maintenance film macromolecular material), within curing time, make concrete surface relative humidity remain on 80-90%.
(8), cover geotextiles: until the initial set of railway roadbed board concrete slightly when intensity, on concrete surface, cover or lay geotextiles, flanging is carried out with fragment of brick or stone in two sides, the suitably moistening increase deadweight of watering of geotextiles, to prevent that strong wind from starting geotextiles and water-saving moist keeping maintenance film, geotextiles also can suitably be incubated concrete simultaneously;
(9), monitoring curing temperature: monitoring maintenance temperature of shed (monitoring in 24 hours): also supplement in time curing water, guarantee concrete quality; After maintenance 3 days, change conventional or common covering watering maintenance into;
(10), build next section of ballastless track bed board concrete, repeating step (2) is to step (9).
The invention has the beneficial effects as follows: a kind of double-block type ballastless track is in the maintenance process of extreme environment, this maintenance process adopts the maintenance method of curing agent+water-saving moisturizing maintenance mould+geotextiles+maintenance canopy+warm-air drier, between curing time, concrete surface only need be laid when film is supported in water saving and sprinkle water once, can save maintenance water more than 95%.Reach water saving, environmental protection, anti-cracking and increase the annual effectively engineering time, realize to greatest extent the recycling of conserving material, reduce waste of material.Effectively controlled ballastless track bed board concrete cracking problem, thereby the double-block ballastless track supporting layer of realization maintenance under severe environmental conditions and road bed board high-quality, efficient and environmental protection are reached.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Fig. 1 is vertical structure schematic diagram of the present invention
Fig. 2 is maintenance process route map of the present invention
In the embodiment shown in Fig. 1 of the present invention, the present invention takes following steps to implement:
Step 1
(1), ballastless track bed board is carried out to concrete construction;
Step 2
(1), creative activity maintenance canopy or operation canopy 1;
(2), activity maintenance canopy or operation canopy 1 are arranged on ballastless track bed board, heating installation is in maintenance canopy is stretched in one end of carrier pipe 8, and the other end is fixed on warm-air drier 5;
(3), starting warm-air drier 5, heating installation is in carrier pipe 8 is inputted maintenance canopy;
(4), press polish concrete surface: concrete enters to complete after mould slightly floatingly in half an hour with wooden patter, uses steel spatula to concrete floating (at least 2 times) after 1-2 hour again; For preventing that concrete surface dehydration from producing fine cracks, the press polish concrete surface of again wiping one's face after concrete enters mould 3-4h.
Step 3:
(1) spraying curing agent: lose and swim at press polish concrete surface, with finger flicking without finger mark, when tack-free, spray XD-1004 curing agent with sprayer at press polish concrete surface and carry out maintenance, curing agent consumption is: 0.3～0.4kg/m2, thickness is not less than 0.2mm, does not evenly lump to save the spraying of card curing agent; Also can manually brush, should not be too far away apart from concrete surface when brushing, the 30-40 centimetre of brushing of being advisable; Thickness requires evenly, and every square metre of consumption is 0.2 kilogram.First horizontal brushing one times, more vertically brushing from top to bottom, brush light brush fast, to accomplish even, consistency of thickness, is not with brush mark, every all over accomplishing without any letup, without phenomenons such as trickling, leakage brushes.
(2), cover water-saving moisturizing maintenance mould: after curing agent 4 has sprayed, can cover water-saving moist keeping maintenance film 3, water-saving moist keeping maintenance film 3 be covered on the face of bed board 6, the water-saving moist keeping maintenance film 3 that its two sides and flanging leave; Width is 3.9 meters, and water is spilt to the surface of water-saving moist keeping maintenance film 3, and free water is 3-4mm.
(3), cover (laying) geotextiles: until 6 concrete settings of track bed board slightly when intensity, cover (laying) geotextiles 2, simultaneously geotextiles surrounding and stone or soil compaction for upper surface, to prevent that the situation that strong wind starts geotextiles and water-saving moist keeping maintenance film from occurring.For water-saving moisturizing degree and prevent from being blown up and increase geotextiles 2 own wts, geotextiles surface suitably watering is moistening to gain in weight.Geotextiles also can play insulation effect to concrete simultaneously.
Step 4
(1), monitoring maintenance temperature of shed (monitoring 24 hours every days): also supplement in time curing water, guarantee concrete quality, maintenance, after 3 days, changes conventional or common covering watering maintenance into.Adopt and manually lift capable way transfer maintenance canopy, maintenance canopy is placed on lower concrete non-fragment orbit base or track bed board, and the 30cm geotextiles weight compacting that both sides are reserved, prevent that strong wind from blowing activity maintenance canopy 1 off.
Step 5: carry out the construction of next section of road bed board, repeating step one and step 4.
Cage of reinforcement shown in accompanying drawing 1 of the present invention, adopts the reinforcement fabrication of φ 14, by 6m, one joint is set, and is divided into the long trifle of 3 2m, the elongated reinforcing bar welding of 6m for skeleton, then be welded with bearing bar and reinforce and be made into cage of reinforcement.
Make tarpaulin with composite earthwork cloth, geotextiles be compound, points three layers, internal layer cotton, outside two layers of plastic cloth.Tarpaulin is fixed on and on skeleton, forms maintenance canopy.Maintenance canopy has effect of insulation, moisturizing, windproof, vaporization prevention.
Compound geotextiles is provided with hole, with iron wire by compound geotextiles colligation on skeleton.Every skeleton colligation point is no less than 6.Longitudinal rib and diagonal brace muscle are quite a few in 60cm, with composite earthwork cloth colligation once.Require iron wire colligation firm; Punch position is accurate, avoids causing geotextiles fold; Eyelet is as far as possible little, prevents that wind from blowing greatly ceasma.
The concrete water-saving moist keeping maintenance film that the present invention adopts is a kind of controlled macromolecular material, taking plastic sheeting as carrier, adhesion can absorb the macromolecular material of the moisture of 200 times of own wts, after this material imbibition, become transparent crystalline lens, aqueous water is become to solid water, then, by capillarity, permeate to maintenance face continuously, constantly absorb again the evaporation water in concrete, therefore within curing time, make concrete surface relative humidity remain on 80-90% simultaneously.
After concrete surface brushing curing agent, form the thick diaphragm of one deck, guarantee that the moisture of inside concrete is difficult for running off.Cover subsequently water-saving moist keeping maintenance film, thoroughly pin concrete surface moisture.Suitably watering on water-saving moist keeping maintenance film simultaneously.After concrete initial set, cover geotextiles, guarantee concrete ambient humidity, geotextiles covering and heat insulating is no less than 7 days.3. adopt and cover the maintenance of water-saving moisturizing curing membrane.After concrete surface is received sweat, water-saving moist keeping maintenance film is covered on bed board comprehensively, on film, cover geotextiles, play the effect that film is close to concrete surface, also can play the effect that concrete is incubated simultaneously.Geotextiles is suitably sprinkled water, simultaneously with warm-air drier to heating in canopy, thereby concrete is incubated, geotextiles covering and heat insulating is no less than 7 days.
Claims (1)
1. a double-block type ballastless track is in the maintenance process of extreme environment; It is characterized in that:
(1), build ballastless track bed board concrete;
(2), creative activity maintenance canopy;
(3), activity maintenance canopy is arranged on concrete ballastless track bed board, one end of steam heating pipe is stretched in maintenance canopy, and the other end is fixed on warm-air drier;
(4), start warm-air drier, heating installation is in steam heating pipe is delivered to maintenance canopy;
(5), press polish concrete surface: after concrete enters mould in half an hour, complete slightly floatingly to entering mould the reinforcement of concrete wood patter, with steel spatula, mould inner concrete is smeared to 2-4 time again after 1-2 hour; For preventing that concrete surface dehydration from producing fine cracks, enter after mould 3-4h at concrete, with steel spatula to the mould inner concrete press polish concrete surface of again wiping one's face;
(6), spraying curing agent:, lose and swim, when tack-free, spray curing agent carry out maintenance with sprayer at the concrete surface of press polish without finger mark with finger flicking concrete surface, curing agent consumption is: 0.3～0.4kg/m
2, thickness is not less than 0.2mm; After brushing, form layer protecting film at concrete surface, guarantee that the moisture of inside concrete is difficult for running off; After concrete initial set, concrete surface is fully sprinkled water, increase the moisture of inside concrete, make film be close to concrete surface simultaneously; Finally cover the geotextiles insulation of sprinkling water, geotextiles covering and heat insulating is no less than 7 days;
(7), bedding water-saving moist keeping maintenance film: after concrete surface spraying curing agent is completed, can lay water-saving moist keeping maintenance film; Water-saving moisturizing maintenance mould is ajusted and is placed on bed board face, and the water-saving moist keeping maintenance film wide that road bed board covers is 3.9 meters; On water-saving moist keeping maintenance film, sprinkle water, make water-saving moist keeping maintenance film surface free water reach 3-4mm, within curing time, make concrete surface relative humidity keep 80-90%.
(8), cover geotextiles: until the initial set of railway roadbed board concrete slightly when intensity, on concrete surface, cover geotextiles, flanging is carried out with fragment of brick or stone in two sides, the suitably moistening increase deadweight of watering of geotextiles, to prevent that strong wind from starting geotextiles and water-saving moist keeping maintenance film, geotextiles also can suitably be incubated concrete simultaneously;
(9), monitoring curing temperature: monitoring maintenance 24 hours every days temperature of shed: also supplement in time curing water, guarantee concrete quality; After maintenance 3 days, change conventional or common covering watering maintenance into;
(10) build next section of ballastless track bed board concrete, repeating step (2) is to step (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310164931.0A CN104109989A (en) | 2013-04-18 | 2013-04-18 | Method for curing double-block ballastless tracks in extreme environments |
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| CN201310164931.0A CN104109989A (en) | 2013-04-18 | 2013-04-18 | Method for curing double-block ballastless tracks in extreme environments |
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| CN104109989A true CN104109989A (en) | 2014-10-22 |
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| CN201310164931.0A Pending CN104109989A (en) | 2013-04-18 | 2013-04-18 | Method for curing double-block ballastless tracks in extreme environments |
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Cited By (3)
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| CN108978665A (en) * | 2018-08-17 | 2018-12-11 | 徽都建设有限公司 | One kind is cast-in-place to build concrete curing method |
| CN110130664A (en) * | 2019-04-02 | 2019-08-16 | 上海大学 | A kind of mass concrete maintenance process |
| CN113463934A (en) * | 2021-07-20 | 2021-10-01 | 江西省交通工程集团建设有限公司 | Temperature-control anti-cracking curing method for mass concrete |
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Cited By (3)
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| CN110130664A (en) * | 2019-04-02 | 2019-08-16 | 上海大学 | A kind of mass concrete maintenance process |
| CN113463934A (en) * | 2021-07-20 | 2021-10-01 | 江西省交通工程集团建设有限公司 | Temperature-control anti-cracking curing method for mass concrete |
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Application publication date: 20141022 |