CN101722573B - Steam box for box girder erection support grouting in severe cold region and curing method thereof - Google Patents
Steam box for box girder erection support grouting in severe cold region and curing method thereof Download PDFInfo
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- CN101722573B CN101722573B CN2009102287185A CN200910228718A CN101722573B CN 101722573 B CN101722573 B CN 101722573B CN 2009102287185 A CN2009102287185 A CN 2009102287185A CN 200910228718 A CN200910228718 A CN 200910228718A CN 101722573 B CN101722573 B CN 101722573B
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Abstract
The invention provides a steam box for box girder erection support grouting in a severe cold region. The steam box comprises a square box body, wherein the bottom of the box body is provided with caster wheels; a heating pipe is arranged in the box body; and both side walls of the box body are provided with a switch connected with a gas pipe respectively. The invention also provides a method for curing the box girder erection support grouting using the steam box in the severe cold region. The steam box and the method have the effects of applying steam curing to bridging construction and improving work efficiency, ensure quality of support grouting, avoid quality defects after grouting, save time for the bridging construction and accelerate construction progress. One girder is erected for about 6 hours if not using the steam curing; and one girder is erected for 4 hours if using the steam curing, and one more girder is erected on average per day so as to ensure high quality and high efficiency of erecting box girders. The required grouting strength of through holes of a bridge girder erection machine is over 20MPa in the process of erecting the box girders of 900 tons in the severe cold region. The steam box is immediately subjected to steam curing after grouting, ensures that about 45 min is needed when the strength reaches 20MPa.
Description
Technical field
The invention belongs to box girder erection support grouting in severe cold region steam box and maintenance process thereof, this method is mainly used in 900 tons of box beam erection engineerings.
Technical background
When 900 tons of box beam erection winter construction of severe cold area, the maintenance process of adopting is that the grouting slurry is gone up cotton-wadded quilt all around usually, and this method filling intensity reached the 20MPa stand-by period about 3 hours, about 6 hours consuming time of frame one Pin beam.And because powerful feature morning of grouting material, if maintenance in early stage environment can not be guaranteed, common quality defects such as the face blind crack that directly causes being in the milk occur.Therefore being badly in need of a kind of device carries out maintenance, shortens the grouting back intensity stand-by period, guarantees construction quality, improves efficiency of construction.
Summary of the invention
For solving the problem that exists in the above-mentioned technology, the purpose of this invention is to provide a kind of box girder erection support grouting in severe cold region steam box and maintenance process thereof, effectively guaranteed construction quality, improved efficiency of construction.
For achieving the above object, the technical solution used in the present invention provides a kind of box girder erection support grouting in severe cold region maintenance process of adopting steam box, in the box beam erection process, when beam is finished, fallen to the contraposition of case beam after on the jack, four the bearing crab-bolt bars in case beam bottom have been arranged in the anchor hole of pier stud top pinner, last anchoring forms being connected and fixed of case beam and pier stud by grouting, and grouting needs maintenance after finishing, and this maintenance process may further comprise the steps:
1. the water heating is placed on two described steam boxes at the two ends of case beam, add grouting material mixing water and to steam box, be scheduled to the red line position, energising is heated to fluidized state with mixing water, connect an end of appendix simultaneously at the switch place, two gas outlets of steam box, described steam box power is 6000W, operating voltage is 380V, and each steam box is that two bearings carry out steam curing simultaneously, and a Pin beam needs two steam boxes;
2. before the pinner anchor hole preheating box beam erection hot-water bag is placed in the pinner anchor hole, simultaneously the insulation of pinner surface coverage cotton-wadded quilt;
3. the hot-water bag in the pinner anchor hole is taken out in the beam contraposition that falls, and the contraposition of case beam is finished;
4. grouting construction carries out the support grouting construction according to routine grouting construction technology in winter;
5. make confined space and on the grouting slurry face that 4. step forms, cover one deck plastic foil immediately, cotton-wadded quilt is wrapped around bearing, form confined space; Add the enclosing aerofoil in the cotton-wadded quilt periphery then, prevent that part steam from leaking outside;
6. steam curing passes to two appendix other ends of above-mentioned steam box in the confined space of cotton-wadded quilt and bearing formation;
Field fabrication and grouting material test cube in the same condition when 7. ruggedness test is in the milk, specification is 40 * 40 * 160mm, is placed in the 5. described confined space of step, carry out steam curing together, by the test block compression test, when compression strength reaches 20MPa, remove steam unit.
Effect of the present invention is in severe cold area box beam erection engineering, and the intensity stand-by period obviously shortens behind the support grouting, has improved the speed of setting a roof beam in place greatly, has guaranteed construction quality.Adopt steam curing, can guarantee support grouting quality, efficiently set a roof beam in place.The appearance of some common quality defects after both having avoided being in the milk has been saved the time accelerating construction progress for the construction of building bridge again.When not using steam curing, frame one Pin beam needs about 6 hours; Use steam curing, frame one Pin beam needs 4 hours, average every day many 1 Pin beams, thereby guarantee box beam erection high-quality, efficient.In 900 tons of box beam erection processes of severe cold area, bridge formation machine via hole necessarily requires filling intensity more than 20MPa.After grouting is finished, carry out steam curing immediately, intensity reaches the 20MPa required time and is about about 45min.
Description of drawings
Fig. 1 is a steam box structural representation of the present invention;
Fig. 2 is a steam curing structural representation of the present invention;
Fig. 3 is the local enlarged diagram of Fig. 2;
Fig. 4 steam curing process chart of the present invention.
Among the figure:
1, casing 2, castor 3, heat-generating pipe 4, gas outlet switch
5, appendix 6, bearing 7, slurry 8, deep bead
The specific embodiment
Reaching embodiment in conjunction with the accompanying drawings is illustrated box girder erection support grouting in severe cold region steam box of the present invention and maintenance process thereof.
Box girder erection support grouting in severe cold region steam box of the present invention, the structure of this steam box includes square box 1, be provided with castor 2 in the bottom of described casing 1, in described casing 1, be provided with heat-generating pipe 3, on the two side of described casing 1, be respectively equipped with the gas outlet switch 4 that connects appendix.
Adopt the box girder erection support grouting in severe cold region maintenance process of above-mentioned steam box, in the box beam erection process, when beam is finished, fallen to the contraposition of case beam after on the jack, four the bearing crab-bolt bars in case beam bottom have been arranged in the anchor hole of pier stud top pinner, last anchoring forms being connected and fixed of case beam and pier stud by grouting, and grouting needs maintenance after finishing, and this maintenance process may further comprise the steps:
1. the water heating is placed on two above-mentioned steam boxes at the two ends of case beam, add grouting material mixing water and to steam box, be scheduled to the red line position, energising is heated to fluidized state with mixing water, connect an end of appendix 5 simultaneously at two gas outlet switch 4 places of steam box, described steam box power is 6000W, operating voltage is 380V, and each steam box is that two bearings carry out steam curing simultaneously, and a Pin beam needs two steam boxes;
2. before the pinner anchor hole preheating box beam erection hot-water bag is placed in the pinner anchor hole, simultaneously the insulation of pinner surface coverage cotton-wadded quilt;
3. the hot-water bag in the pinner anchor hole is taken out in the beam contraposition that falls, and the contraposition of case beam is finished;
4. grouting construction carries out the support grouting construction according to routine grouting construction technology in winter;
5. make confined space and on 7 of grouting slurries that 4. step forms, cover one deck plastic foil immediately, cotton-wadded quilt is wrapped around bearing, form confined space; Add enclosing aerofoil 8 in the cotton-wadded quilt periphery then, prevent that part steam from leaking outside;
6. steam curing passes to two appendix other ends of above-mentioned steam box in the confined space of cotton-wadded quilt and bearing formation;
Field fabrication and grouting material test cube in the same condition when 7. ruggedness test is in the milk, specification is 40 * 40 * 160mm, is placed in the 5. described confined space of step, carry out steam curing together, by the test block compression test, when compression strength reaches 20MPa, remove steam unit.
The box girder erection support grouting in severe cold region maintenance process of the above-mentioned steam box of employing of the present invention is achieved in that concrete steps are:
(1) the water heating adds mixing water to predetermined red line position in steam box, and energising is heated to fluidized state with mixing water, connects appendix 5 at two gas outlet switch 4 places simultaneously.
(2) preheating of pinner anchor hole is placed on the electric heating hot-water bag in the anchor hole, covers cotton-wadded quilt above to the pinner preheating,
(3) fall to taking out the electric heating hot-water bag when beam contraposition case beam falls the beam contraposition.
(4) grouting according to winter grouting construction technology carry out the support grouting operation.
(5) after grouting is finished, cover one deck plastic foil 7 of grouting slurries immediately, bearing is gone up cotton-wadded quilt all around, forms confined space.Add enclosing aerofoil 8 in the cotton-wadded quilt periphery then, prevent that steam from leaking outside.
(6) steam curing is ventilated to the space of cotton-wadded quilt and bearing 6 formation.
(7) the ruggedness test field fabrication with 40 * 40 * 160mm test block of grouting material with condition, be placed in the 5. described confined space of step, carry out steam curing together, by the test block compression test, when this test block compression strength reaches 20MPa, remove steam unit.
Support grouting steam curing method of the present invention is applied in 900 tons of box beam erection engineerings of the Harbin-to-Dalian special second Song Hua River grand bridge of visitor.Adopt steam curing, improved the speed of setting a roof beam in place greatly.Last year, my bridge train became the maximum troop of number that sets a roof beam in place in the winter construction in middle traffic control section.And institute's frame case beam all is up to the standards by management, owner.The middle headquarter of handing over bind into book form support grouting steam curing construction technology establishment of the present invention, promote completely in middle traffic control section, verify applicability of the present invention from the front.
Claims (1)
1. box girder erection support grouting in severe cold region maintenance process of adopting steam box, in the box beam erection process, when beam is finished, fallen to the contraposition of case beam after on the jack, four the bearing crab-bolt bars in case beam bottom have been arranged in the anchor hole of pier stud top pinner, last anchoring forms being connected and fixed of case beam and pier stud by grouting, and grouting needs maintenance after finishing, and this maintenance process may further comprise the steps:
1. the water heating is placed on two described steam boxes at the two ends of case beam, add grouting material mixing water and to steam box, be scheduled to the red line position, energising is heated to fluidized state with mixing water, connect an end of appendix simultaneously at the switch place, two gas outlets of steam box, described steam box power is 6000W, operating voltage is 380V, and each steam box is that two bearings carry out steam curing simultaneously, and a Pin beam needs two steam boxes;
2. before the pinner anchor hole preheating box beam erection hot-water bag is placed in the pinner anchor hole, simultaneously the insulation of pinner surface coverage cotton-wadded quilt;
3. the hot-water bag in the pinner anchor hole is taken out in the beam contraposition that falls, and the contraposition of case beam is finished;
4. grouting construction carries out the support grouting construction according to routine grouting construction technology in winter;
5. make confined space and on the grouting slurry face that 4. step forms, cover one deck plastic foil immediately, cotton-wadded quilt is wrapped around bearing, form confined space; Add the enclosing aerofoil in the cotton-wadded quilt periphery then, prevent that part steam from leaking outside;
6. steam curing passes to two appendix other ends of above-mentioned steam box in the confined space of cotton-wadded quilt and bearing formation;
Field fabrication and grouting material test cube in the same condition when 7. ruggedness test is in the milk, specification is 40 * 40 * 160mm, is placed in the 5. described confined space of step, carry out steam curing together, by the test block compression test, when compression strength reaches 20MPa, remove steam unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102287185A CN101722573B (en) | 2009-11-25 | 2009-11-25 | Steam box for box girder erection support grouting in severe cold region and curing method thereof |
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| CN2009102287185A CN101722573B (en) | 2009-11-25 | 2009-11-25 | Steam box for box girder erection support grouting in severe cold region and curing method thereof |
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| CN101722573A CN101722573A (en) | 2010-06-09 |
| CN101722573B true CN101722573B (en) | 2011-08-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108678B (en) * | 2011-01-18 | 2014-09-17 | 龙建路桥股份有限公司 | High-altitude construction complete set device and method in winter |
| CN104233960B (en) * | 2014-09-30 | 2016-02-17 | 中铁四局集团有限公司 | For workpiece and the construction method of the grouting of bridge continuous beam web |
| CN111197286A (en) * | 2020-01-16 | 2020-05-26 | 中交一公局第八工程有限公司 | High-speed railway support mortar steam curing means |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000239076A (en) * | 1999-02-22 | 2000-09-05 | Matsushita Electric Works Ltd | Production of inorganic board |
| CN2803666Y (en) * | 2005-05-31 | 2006-08-09 | 钱龙飞 | Steam maintenace appts for cellular concrete building blocks |
| CN1830644A (en) * | 2006-04-17 | 2006-09-13 | 上海隧道工程股份有限公司 | Cast-in-place box girder low-temperature steam maintenance operating method |
| CN201050777Y (en) * | 2007-06-21 | 2008-04-23 | 吴达新 | Multifunctional movable steam generator |
| CN201140438Y (en) * | 2007-12-25 | 2008-10-29 | 中铁四局集团有限公司 | Automation control apparatus for case beam steam maintenance |
| KR20090078149A (en) * | 2008-01-14 | 2009-07-17 | 양상규 | Automatic system controlling the steam curing and method controlling the steam curing using the same |
-
2009
- 2009-11-25 CN CN2009102287185A patent/CN101722573B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000239076A (en) * | 1999-02-22 | 2000-09-05 | Matsushita Electric Works Ltd | Production of inorganic board |
| CN2803666Y (en) * | 2005-05-31 | 2006-08-09 | 钱龙飞 | Steam maintenace appts for cellular concrete building blocks |
| CN1830644A (en) * | 2006-04-17 | 2006-09-13 | 上海隧道工程股份有限公司 | Cast-in-place box girder low-temperature steam maintenance operating method |
| CN201050777Y (en) * | 2007-06-21 | 2008-04-23 | 吴达新 | Multifunctional movable steam generator |
| CN201140438Y (en) * | 2007-12-25 | 2008-10-29 | 中铁四局集团有限公司 | Automation control apparatus for case beam steam maintenance |
| KR20090078149A (en) * | 2008-01-14 | 2009-07-17 | 양상규 | Automatic system controlling the steam curing and method controlling the steam curing using the same |
Non-Patent Citations (1)
| Title |
|---|
| 文向东.客运专线900t整孔箱梁冬期蒸养施工技术.《铁道建筑》.2008,(第9期), * |
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Address after: 300456 No. two, No. 173, Xingang Road, Tanggu District, Tianjin Patentee after: Civil Aviation Airport Construction Engineering Co.,Ltd. Address before: 300456 No. two, No. 173, Xingang Road, Tanggu District, Tianjin Patentee before: NO.4 ENGINEERING COMPANY LTD. OF CCCC FIRST HARBOR ENGINEERING Co.,Ltd. |