CN103603236A - Method for controlling cracks of double-block type ballastless track bed slabs - Google Patents
Method for controlling cracks of double-block type ballastless track bed slabs Download PDFInfo
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- CN103603236A CN103603236A CN201310543247.3A CN201310543247A CN103603236A CN 103603236 A CN103603236 A CN 103603236A CN 201310543247 A CN201310543247 A CN 201310543247A CN 103603236 A CN103603236 A CN 103603236A
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Abstract
The invention discloses a method for controlling cracks of double-block type ballastless track bed slabs. The method includes steps of pouring concrete back and forth among double-block type sleepers according to 'Z'-shaped paths; vibrating the concrete, in other words, performing a secondary vibrating process in procedures for pouring the concrete of double-block type track bed slabs according to slump and the initial setting time of the concrete, performing press polish on plastered surfaces, performing rough screeding by the aid of wood float after the concrete is filled into forms, secondarily plastering the surfaces 2 hours after the concrete is filled into the forms, and performing tertiary press polish on the plastered surfaces 4 hours after the concrete is filled into the forms; loosening vertical screw adjusters, fish plates and fasteners, in other words, loosening vertical adjusting screws 4.5 hours after the concrete is plastered on the surfaces, loosening the corresponding fish plates from two sides of a pouring starting end, timely loosening the fasteners by the aid of a bolt fastening machine after bolts of the fish plates are loosened, and removing connection; spraying maintenance liquid. The cracks of the ballastless track bed slabs can be reduced in construction procedures, so that trains can assuredly run safely, economically and quickly. The method has the advantages of simplicity in process, convenience in operation and easiness in construction. Besides, the construction quality of the ballastless track bed slabs can be improved.
Description
Technical field
The present invention relates to a kind of double-block ballastless track bed board crack controlling means, particularly a kind of CRTS I type double-block ballastless track bed board crack controlling means.
Background technology
The period of current China high ferro fast development, personal rapid transit between each provincial capital and big and medium-sized cities, the speed rail passage of planning " four horizontal four is vertical " is all in the climax of constructing, but the situation of ubiquity ballastless track bed board cracking in built or the high-speed railway that is open to traffic, for operation security and maintenance have brought inconvenience.
Existing construction technology and technique are in ballastless track bed board work progress, concrete building used pump truck or hopper directly to build, disposable having vibrated of vibrating, surface is received light and is only carried out 1 time or 2 receipts light, and receive light time watering, receive improper between the light time and receive light trowel and receive and smear arbitrarily.Incorrect to order and the time of the vertical screw regulator of pine, splice bar, fastener while using the construction of section of track framework method.When the maintenance of road bed board, technique is incorrect, and above construction method and technique all occur crackle by the bed board that causes in various degree.Violated the acceptance requirement of high ferro.
Crackle for high ferro non-fragment orbit occurs that the damage of Jiang Dui road bed board is serious, and water enters into crackle and makes bed board arrangement of reinforcement get rusty, expand, cause bed board to occur large-area crackle and damage.Once ballastless track bed board cracking is repaired difficult, expense is high, time length causes train normally not move, and meanwhile, based on economy and safety, waits many factors, and existing road bed board crackle control technology and technique can not meet construction requirement.
Summary of the invention
Its object of the present invention is just to provide a kind of double-block ballastless track bed board crack controlling means, solves the problem reduce ballastless track bed board crackle in work progress, for the operation of train provide safety, economical, ensure fast.Have the advantages that technique is simple, easy to operate, be easy to construction, improved the construction quality of ballastless track bed board.
The technical scheme that realizes above-mentioned purpose and take, comprises step
1) concreting
Solidifying soil is built and frontly supporting bed, sleeper is carried out moistening, between double-block type sleeper, by "the" shape route, pours into back and forth;
2) concrete vibrating
In double-block type railway roadbed board concrete casting process, according to concrete slump and initial setting time, adopt secondary vibration technique, adopt for the first time Φ 50 vibrating spears to vibrate between sleeper, adopt for the second time Φ 30 vibrating spears to vibrate at sleeper circumferential, the standard of vibratory compaction take concrete not sinking, surface presents laitance as degree;
3) receiving light wipes one's face
Concrete enters with wood, to have smeared after mould thick flatly, controls concrete absolute altitude and surface finish, enters mould after 2 hours, carry out quadric-plastering at concrete, forbids the profit face of sprinkling water while wiping one's face, and enters the mould press polish of wiping one's face for the third time for 4 hours;
4) the vertical screw regulator of pine, splice bar, fastener
Concrete coating finished after 4.5 hours, start loose vertical adjustment screw rod, the direction vertical screw rod first being made progress with spanner is rotated 180 degree, use the unified 0.5mm-1mm of reduction of the section of track, then from starting to build end both sides loose splice bar simultaneously, fish-bolt unclamps rear in time with the loosening fastener of Screw Tightening Machines, removes and connects;
5) curing fluid capable spraying
After concreting 4.5h, the gentle receipts light quality of essence reaches requirement, after passed examination, when tack-free with finger flicking, use in time atomizers spray curing agent, for rail, section of track below, with soft brushing, brush, curing agent consumption is 3.9m/5kg, and side form sprays immediately curing fluid capable after the demoulding, often tears open after a template brushing curing fluid capable, pull down again a template, and after Cheng Mo, adopt timely the geotextiles of two cloth one films to cover.
Compared with prior art the present invention has the following advantages.
1. the present invention makes the crackle of ballastless track bed board occur having obtained improving greatly, has improved greatly the construction quality of ballastless track bed board;
2. the present invention is not subject to construction plant environmental constraints, can control the appearance of crackle under the inputs such as same manpower, financial resources, thing force-summing device, and process is easy, is easy to construction;
3. reduced greatly rework rate, cost-saving, social benefit and economic benefit are obvious.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the sequential schematic that road of the present invention bed board is built.
Fig. 2 is that road of the present invention bed board is built the schematic diagram that vibrates.
In figure, 1 for building a little, and 2 for building order, and 3 is Φ 50 vibrating spears, and 4 is Φ 30 vibrating spears.
The specific embodiment
Comprise step
1) concreting
Solidifying soil is built and frontly supporting bed, sleeper is carried out moistening, pours into back and forth, as shown in Figure 1 between double-block type sleeper by "the" shape route;
2) concrete vibrating
In double-block type railway roadbed board concrete casting process, according to concrete slump and initial setting time, adopt secondary vibration technique, adopt for the first time Φ 50 vibrating spears to vibrate between sleeper, adopt for the second time Φ 30 vibrating spears to vibrate at sleeper circumferential, the standard of vibratory compaction take concrete not sinking, surface presents laitance as degree, as shown in Figure 2;
3) receiving light wipes one's face
Concrete enters with wood, to have smeared after mould thick flatly, controls concrete absolute altitude and surface finish, enters mould after 2 hours, carry out quadric-plastering at concrete, forbids the profit face of sprinkling water while wiping one's face, and enters the mould press polish of wiping one's face for the third time for 4 hours;
4) the vertical screw regulator of pine, splice bar, fastener
Concrete coating finished after 4.5 hours, start loose vertical adjustment screw rod, the direction vertical screw rod first being made progress with spanner is rotated 180 degree, use the unified 0.5mm-1mm of reduction of the section of track, then from starting to build end both sides loose splice bar simultaneously, fish-bolt unclamps rear in time with the loosening fastener of Screw Tightening Machines, removes and connects;
5) curing fluid capable spraying
After concreting 4.5h, the gentle receipts light quality of essence reaches requirement, after passed examination, when tack-free with finger flicking, use in time atomizers spray curing agent, for rail, section of track below, with soft brushing, brush, curing agent consumption is 3.9m/5kg, and side form sprays immediately curing fluid capable after the demoulding, often tears open after a template brushing curing fluid capable, pull down again a template, and after Cheng Mo, adopt timely the geotextiles of two cloth one films to cover.
Technical solution of the present invention is carried out as follows:
Building front support layer surface and sleeper should be moistening, the watering of supporting bed surface, and sleeper circumferential and bottom adopt sprayer repeatedly to spray.For reducing excessively, vibrate, railway roadbed board concrete can not a bit be built, vibrating spear is caught up with material, and should between double-block type sleeper, by "the" shape route, pour into back and forth.Railway roadbed board concrete should adopt secondary vibration technique, adopts for the first time Φ 50 vibrating spears to vibrate between sleeper, adopts for the second time Φ 30 vibrating spears to vibrate at sleeper circumferential, strengthens the concrete density of bonding and sleeper bottom of newly placed concrete and sleeper.Before the initial set of railway roadbed board concrete, should, through smearing pressure 3-5 time, in the process of wiping one's face, forbid to sprinkle water.While clearing up sleeper in the process of wiping one's face, application hairbrush or dry wipe cleaning, must not water cleaning.After railway roadbed board concrete spraying curing agent, should unclamp in time the fish-bolt of mileage outermost two ends, young concrete front and back tool track, avoid because of the impact of front and back tool track temperature deformation on young concrete; The bolt of tool track fastener should unclamp near concrete final setting time.Railway roadbed board concrete should adopt spraying curing agent and cover the Windproof thermal insulation moisture-keeping maintaining measure of geotextiles, plastic sheeting and cotton-wadded quilt.Being sprayed on of curing agent carried out after wiping one's face for the last time immediately, and the mode that should adopt spraying and roller coating to combine, must not be used hairbrush brushing.At sleeper circumferential, will check curing agent construction quality, drain spray holiday place processes in time.Behind the two side template places of tearing open, should carry out immediately maintenance and construction.Curing agent is forbidden to contact with water before film forming, avoids affecting quality of forming film.
Embodiment
1. concreting technology
Solidifying soil is built front reply supporting bed, sleeper carries out moistening, guarantee that supporting bed and sleeper are completely moistening, and must not there is obvious ponding, if do not sprinkle water moistening cause concrete and supporting bed, the dehydration of sleeper contact position concrete, cause concrete in earlier stage to shrink the inconsistent crackle that causes and produce.For reducing excessively, vibrate, railway roadbed board concrete can not a bit be built, vibrating spear is caught up with material, and should between double-block type sleeper, by "the" shape route, pour into back and forth, otherwise cause bed board surface, the road concrete disintegration of having built to occur laitance, cause shrinking the inconsistent crackle that occurs.
2. concrete vibrating technology
In double-block type railway roadbed board concrete casting process, in order to improve concrete compactness and to reduce crackle, according to concrete slump and initial setting time, adopt secondary vibration technique, adopt for the first time Φ 50 vibrating spears to vibrate between sleeper, adopt for the second time Φ 30 vibrating spears to vibrate at sleeper circumferential, strengthen the concrete density of bonding and sleeper bottom of newly placed concrete and sleeper.The standard of vibratory compaction take concrete not sinking, surface presents laitance as degree, prevented from shaking, and leaked and shake.Otherwise cause vibration leakiness, in concrete setting process, occur crackle.
3. receive the light technology of wiping one's face
Concrete has been smeared thick putting down with wood after entering mould, thick flat with mould control concrete absolute altitude and surface finish.For preventing that concrete surface dehydration from producing fine cracks, at concrete, enter mould and after 2 hours, carry out quadric-plastering, while wiping one's face, forbid the profit face of sprinkling water, otherwise cause the concrete crackle in top layer.In the process of wiping one's face, to note strengthening the construction to positions such as rail below, sleeper circumferentials.Enter the mould press polish of wiping one's face for the third time for 4 hours.In the process of wiping one's face, will note strengthening the construction to positions such as rail, joist below, sleeper circumferentials, while wiping one's face at sleeper circumferential place, trowel to sleeper direction firmly, avoids sleeper circumferential and Eight characters crackle to occur in early days.
4. the vertical screw regulator of pine, splice bar, fastener time aspect technology
Concrete coating finishes approximately, about 4.5 hours, to start loose vertical adjustment screw rod, and the direction vertical screw rod first being made progress with spanner is rotated 180 degree, uses the unified 0.5mm-1mm of reduction of the section of track, improves the density of road, sleeper below bed board; Then from starting to build end both sides loose splice bar simultaneously, fish-bolt unclamps rear in time with the loosening fastener of Screw Tightening Machines, remove and connect, discharge stress, concrete can not cracked because temperature raises, allow newly placed concrete in free state and prevent that rail heating and cooling from causing new fluid concrete to be subject to tensile stress and producing crack.
5. curing fluid capable spraying technology
4.5h left and right after concreting, the gentle receipts light quality of essence reaches requirement, after passed examination, when tack-free with finger flicking, use in time atomizers spray curing agent, for preventing from spraying the inhomogeneous rotary broom coordinating operation that needs to use, for rail, section of track below, with soft brushing, brush, guarantee that curing agent sprays evenly comprehensively, curing agent consumption is 3.9m/5kg, and side form sprays immediately curing fluid capable after the demoulding, often tears open after a template brushing curing fluid capable, pull down again a template, and after Cheng Mo, adopt timely the geotextiles of two cloth one films to cover.
Claims (1)
1. a double-block ballastless track bed board crack controlling means, is characterized in that, comprises step
1) concreting
Solidifying soil is built and frontly supporting bed, sleeper is carried out moistening, between double-block type sleeper, by "the" shape route, pours into back and forth;
2) concrete vibrating
In double-block type railway roadbed board concrete casting process, according to concrete slump and initial setting time, adopt secondary vibration technique, adopt for the first time Φ 50 vibrating spears to vibrate between sleeper, adopt for the second time Φ 30 vibrating spears to vibrate at sleeper circumferential, the standard of vibratory compaction take concrete not sinking, surface presents laitance as degree;
3) receiving light wipes one's face
Concrete enters with wood, to have smeared after mould thick flatly, controls concrete absolute altitude and surface finish, enters mould after 2 hours, carry out quadric-plastering at concrete, forbids the profit face of sprinkling water while wiping one's face, and enters the mould press polish of wiping one's face for the third time for 4 hours;
4) the vertical screw regulator of pine, splice bar, fastener
Concrete coating finished after 4.5 hours, start loose vertical adjustment screw rod, the direction vertical screw rod first being made progress with spanner is rotated 180 degree, use the unified 0.5mm-1mm of reduction of the section of track, then from starting to build end both sides loose splice bar simultaneously, fish-bolt unclamps rear in time with the loosening fastener of Screw Tightening Machines, removes and connects;
5) curing fluid capable spraying
After concreting 4.5h, the gentle receipts light quality of essence reaches requirement, after passed examination, when tack-free with finger flicking, use in time atomizers spray curing agent, for rail, section of track below, with soft brushing, brush, curing agent consumption is 3.9m/5kg, and side form sprays immediately curing fluid capable after the demoulding, often tears open after a template brushing curing fluid capable, pull down again a template, and after Cheng Mo, adopt timely the geotextiles of two cloth one films to cover.
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| CN201310543247.3A CN103603236A (en) | 2013-11-06 | 2013-11-06 | Method for controlling cracks of double-block type ballastless track bed slabs |
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| CN201310543247.3A CN103603236A (en) | 2013-11-06 | 2013-11-06 | Method for controlling cracks of double-block type ballastless track bed slabs |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568933A (en) * | 2015-12-22 | 2016-05-11 | 黄河养护集团有限公司 | Construction method of concrete poured gate |
| CN106283960A (en) * | 2016-10-17 | 2017-01-04 | 兰州理工大学 | Sleeper and construction method thereof for non-fragment orbit Concrete Crack Control |
| CN106400616A (en) * | 2016-12-05 | 2017-02-15 | 兰州理工大学 | Large-radius chamfer sleeper used for controlling concrete cracks of ballastless track and construction method |
| CN110184864A (en) * | 2019-06-11 | 2019-08-30 | 中铁七局集团有限公司 | A method of reducing double-block ballastless track bed board cracking rate |
| CN110258207A (en) * | 2019-07-01 | 2019-09-20 | 中铁七局集团有限公司 | A kind of maintenance of equipment for double-block ballastless track bed board |
| CN114000379A (en) * | 2021-11-16 | 2022-02-01 | 中铁十二局集团有限公司 | Concrete construction method for CRTS I double-block ballastless track bed plate |
| CN114575203A (en) * | 2022-03-18 | 2022-06-03 | 中铁十二局集团有限公司 | Construction method for preventing and treating cracks of ballastless track bed of plateau railway tunnel |
| CN114941258A (en) * | 2022-06-23 | 2022-08-26 | 中铁十八局集团有限公司 | Anti-cracking construction method for concrete track bed slab of CRTS I type double-block ballastless track of high-speed railway tunnel |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568933A (en) * | 2015-12-22 | 2016-05-11 | 黄河养护集团有限公司 | Construction method of concrete poured gate |
| CN106283960A (en) * | 2016-10-17 | 2017-01-04 | 兰州理工大学 | Sleeper and construction method thereof for non-fragment orbit Concrete Crack Control |
| CN106283960B (en) * | 2016-10-17 | 2018-01-05 | 兰州理工大学 | Sleeper and its construction method for non-fragment orbit Concrete Crack Control |
| CN106400616A (en) * | 2016-12-05 | 2017-02-15 | 兰州理工大学 | Large-radius chamfer sleeper used for controlling concrete cracks of ballastless track and construction method |
| CN106400616B (en) * | 2016-12-05 | 2018-01-02 | 兰州理工大学 | Large radius chamfering sleeper and construction method for non-fragment orbit concrete crack control |
| CN110184864A (en) * | 2019-06-11 | 2019-08-30 | 中铁七局集团有限公司 | A method of reducing double-block ballastless track bed board cracking rate |
| CN110258207A (en) * | 2019-07-01 | 2019-09-20 | 中铁七局集团有限公司 | A kind of maintenance of equipment for double-block ballastless track bed board |
| CN114000379A (en) * | 2021-11-16 | 2022-02-01 | 中铁十二局集团有限公司 | Concrete construction method for CRTS I double-block ballastless track bed plate |
| CN114575203A (en) * | 2022-03-18 | 2022-06-03 | 中铁十二局集团有限公司 | Construction method for preventing and treating cracks of ballastless track bed of plateau railway tunnel |
| CN114941258A (en) * | 2022-06-23 | 2022-08-26 | 中铁十八局集团有限公司 | Anti-cracking construction method for concrete track bed slab of CRTS I type double-block ballastless track of high-speed railway tunnel |
| CN114941258B (en) * | 2022-06-23 | 2023-05-23 | 中铁十八局集团有限公司 | Anti-cracking construction method for CRTS I type double-block ballastless track concrete track slab of high-speed railway tunnel |
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Application publication date: 20140226 |