CN101586465B - Construction method of large-diameter coal bunker flat-topping lid - Google Patents

Construction method of large-diameter coal bunker flat-topping lid Download PDF

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Publication number
CN101586465B
CN101586465B CN2009100745390A CN200910074539A CN101586465B CN 101586465 B CN101586465 B CN 101586465B CN 2009100745390 A CN2009100745390 A CN 2009100745390A CN 200910074539 A CN200910074539 A CN 200910074539A CN 101586465 B CN101586465 B CN 101586465B
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China
Prior art keywords
steel
coal bunker
shaped steel
girder
sliding formwork
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Expired - Fee Related
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CN2009100745390A
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CN101586465A (en
Inventor
王鹏
李树昆
任凤臣
孙桢
郭子健
郭少江
李侠军
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China Coal Building & Installation Engineering Group Co., Ltd.
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China Coal Building And Installation Engineering Co No69 Engineering Office
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Abstract

The present invention discloses a construction method of a large-diameter coal bunker flat-topping lid, which comprises the following technical processes: 1. confirming the positions of the H-shape steel and the slip-form platform, 2. pre-embedding a steel plate in the inner bulkhead of the coal bunker, 3. pre-embedding the steel lattice structural column on the bulkhead ring beam of the coal bunker, 4. lowering the slip-form platform; 5. fixing the slip-form platform; 6. welding and fixing the steel corbel of the H-shape steel, 7. fixing the H-shape steel in position; 8. reinforcing the H-shape steel; 9. installing a bunker top main-beam formwork; 10. binding the main-beam reinforcement steel bars; 11. pouring the main-beam concrete; 12. constructing the secondary beam and the roof plate; and 13. detaching the formwork and the supporting system. The construction method of the large-diameter coal bunker flat-topping lid according to the invention has the advantages of no requirement for building full hall scaffold in the bunker, high work efficiency, short construction period, low construction cost, reliably safety and remarkable economic benefit.

Description

A kind of construction method of large-diameter coal bunker flat-topping lid
Technical field
The present invention relates to a kind of construction techniques, especially a kind of construction method of large-diameter coal bunker flat-topping lid.
Background technology
At present, in the large-diameter coal bunker flat-topping lid structure construction, use scaffold to set up Cang Ding from ground always, fix big beam forms and secondary beam and storehouse top template, long construction period, construction cost height, and safety is low.Therefore, designing a kind of short construction period, low, the safe construction method of large-diameter coal bunker flat-topping lid of construction cost, is the present technical issues that need to address.
Summary of the invention
Technical problem to be solved by this invention provides a kind of short construction period, low, the safe construction method of large-diameter coal bunker flat-topping lid of construction cost.
The technical scheme that the present invention solves its technical problem is:
A kind of construction method of large-diameter coal bunker flat-topping lid, its processing step is: 1. determining of H shaped steel and sliding formwork position of platform, and 2. coal bunker inner barn wall pre-embedded steel slab, 3. steel lattice column is pre-buried on the coal bunker bulkhead collar tie beam, 4. the sliding formwork platform descends, 5. the sliding formwork platform is fixed, and 6. welds the fixedly steel corbel of H shaped steel, and 7. H shaped steel is in place, 8. H section steel reinforcement, 9. girder template in top, storehouse is installed, 10. the girder reinforcing bar binding Main beam concrete is built, Secondary beam and top board construction, Template and support system are removed.
The technical scheme that the present invention solves its technical problem can also be:
Definite step of H shaped steel of the present invention and sliding formwork position of platform is specifically to determine the position of H shaped steel and sliding formwork platform at the design attitude of coal bunker according to coal bunker flat-topping lid main girder (8), described coal bunker inner barn wall pre-embedded steel slab step is for when the coal bunker bulkhead is poured into the precalculated position of H shaped steel and sliding formwork platform, the steel plate of the steel plate of pre-buried fixedly H shaped steel and sliding formwork platform on the inner barn wall of coal bunker bulkhead, the pre-buried step of described steel lattice column is for when building the apical ring beam of coal bunker bulkhead, the pre-buried steel lattice column that exceeds the ring beam top on the coal bunker bulkhead apical ring beam of the both sides of storehouse lid main girder, described sliding formwork platform decline step is for after the coal bunker bulkhead apical ring beam of building solidifies, it is the sliding formwork position of platform that the sliding formwork platform is dropped to the following precalculated position of lid main girder lower plane, storehouse, described sliding formwork platform fixing step is for after the sliding formwork platform drops to the precalculated position, fix the sliding formwork platform by welding sliding formwork platform steel corbel on steel plate pre-buried on the inner barn wall of coal bunker bulkhead, the described welding fixedly steel corbel step of H shaped steel is to weld the fixedly steel corbel of H shaped steel on the pre-buried steel plate of the inner barn wall of coal bunker bulkhead, described H shaped steel step in place is for after steel corbel welds, lift H shaped steel on the steel corbel and weld fixation steel plate and fix, described H section steel reinforcement step is for welding suspension centre on H shaped steel, utilize wire rope by wire clips fixing oblique rope between suspension centre and steel lattice column, top, described storehouse girder template installation steps are for passing through in the vertical rod of H shaped steel upper support, bridging is set between vertical rod fixes the girder soffit formwork, described girder reinforcing bar binding step is to design according to main beam structure, according to the technical requirements of " concrete structure engineering construction quality standards of acceptance " GB50204-2002 to reinforcing bar binding, carry out the layout and the colligation of girder reinforcing bar, described main beam concrete is built step for to support at the girder soffit formwork, the technical requirements of according to " concrete structure engineering construction quality standards of acceptance " GB50204-2002 main beam concrete being built after fixedly finishing, layering, building of main beam concrete carried out in gradation, described secondary beam and top board construction step are installed and reinforcing bar binding for the template of building finish laggard places beam and top board at main beam concrete, carry out the concreting of secondary beam and top board again, described template and support system are removed step for treating girder, be girder after the secondary beam concrete solidifies fully, the secondary beam concrete strength reaches 100% o'clock of design strength, wire rope is unclamped and extract, remove the girder template, secondary beam and roof plate template, H shaped steel, and the steel lattice column exposed parts cut off.
The present invention is in main beam concrete pouring construction process, concreting is carried out in layering, gradation, forbid to touch template and reinforcing bar when vibrating, and build preceding, build neutralization and respectively the stress deformation of H shaped steel monitored after building, at girder four observation points are set vertically, measure once before building, measure once again after building half, measure once again after having built, and stay surveying record.
The present invention is the elongated twice H shaped steel that is provided with under the per pass girder supports, H shaped steel is apart from sliding formwork platform 300mm height, be connected firmly with channel-section steel every 2 meters between the H shaped steel and between H shaped steel and the bulkhead, channel-section steel and the welding of H shaped steel are fixing, and described suspension centre is arranged on the position of H shaped steel and determines according to calculating.
The support of secondary beam of the present invention and top board utilizes diagonal brace, and the template springing height is by designing requirement, and secondary beam and concrete roof are built together.
The invention has the beneficial effects as follows:
Utilize the principle of cable stayed bridge, the H shaped steel of the wide bed at the bottom of the beam is carried out multiple tracks tiltedly draw, make its requirement of satisfying concrete main girder working load, its structural system is simple, and is stressed clear and definite, is convenient to the foundation and the calculating of computation model.
The sliding formwork platform is reduced to desired location, only uses as material loading and operating platform, and it is stressed little, safe and reliable.
Need not to set up in the storehouse full hall scaffold, improved work efficiency, shortened the construction period, reduced construction cost.
Compare with conventional construction method, high-rise working is safe and reliable, has guaranteed construction quality, and speed of application is significantly accelerated, and reduces the use of circulation material in a large number, has reduced labor strength, remarkable in economical benefits.
Description of drawings
Fig. 1 is the schematic diagram that tiltedly draws of the present invention;
Fig. 2 is that steel lattice column of the present invention is arranged schematic diagram;
Fig. 3 is that principle and the girder template of tiltedly drawing of the present invention supports schematic diagram;
Fig. 4 is that girder template of the present invention supports schematic diagram;
Fig. 5 is the support schematic diagram of prior art;
Technological principle of the present invention:
Utilize the principle of cable-stayed bridge (according to stressed calculating, select corresponding H shaped steel, steel wire rope, wire clips, determine the oblique pull suspension centre), wide bed H shaped steel below the lid main girder of flat-top storehouse, and utilize bulkhead structural strength height, advantage that rigidity is big, at bulkhead top pre-buried steel lattice column as suspension centre, by steel wire rope to H shaped steel multiple tracks oblique pull, make its requirement of satisfying bearing capacity, with its supporting member as concrete main girder formwork, casting concrete.
The specific embodiment
A kind of construction method of large-diameter coal bunker flat-topping lid, its processing step is: 1. determining of H shaped steel and sliding formwork position of platform, and 2. coal bunker inner barn wall pre-embedded steel slab, 3. steel lattice column is pre-buried on the coal bunker bulkhead ring beam, 4. the sliding formwork platform descends, 5. the sliding formwork platform is fixed, and 6. welds the fixedly steel corbel of H shaped steel, and 7. H shaped steel is in place, 8. H section steel reinforcement, 9. girder template in top, storehouse is installed, 10. the girder reinforcing bar binding Main beam concrete is built, Secondary beam and top board construction, Template and support system are removed.Definite step of described H shaped steel and sliding formwork position of platform is specifically to determine the position of H shaped steel and sliding formwork platform at the design attitude of coal bunker according to coal bunker flat-topping lid main girder 8, described coal bunker inner barn wall pre-embedded steel slab step is for when coal bunker bulkhead 5 is poured into the precalculated position of H shaped steel 4 and sliding formwork platform 2, the steel plate of the steel plate 3 of pre-buried fixedly H shaped steel 4 and sliding formwork platform 2 on the inner barn wall of coal bunker bulkhead 5, the pre-buried step of described steel lattice column is for when building the apical ring beam of coal bunker bulkhead 5, the pre-buried steel lattice column 6 that exceeds the ring beam top on the coal bunker bulkhead apical ring beam of the both sides of storehouse lid main girder 8, described sliding formwork platform decline step is for after the coal bunker bulkhead apical ring beam of building solidifies, it is the sliding formwork position of platform that sliding formwork platform 2 is dropped to the following precalculated position of lid main girder 8 lower planes, storehouse, described sliding formwork platform fixing step is for after sliding formwork platform 2 drops to the precalculated position, fix sliding formwork platform 2 by welding sliding formwork platform steel corbel 1 on steel plate pre-buried on the inner barn wall of coal bunker bulkhead 5, the described welding fixedly steel corbel step of H shaped steel is to weld the fixedly steel corbel 9 of H shaped steel 4 on the pre-buried steel plate 3 of the inner barn wall of coal bunker bulkhead 5, described H shaped steel step in place is after steel corbel 9 welding are good, lift H shaped steel 4 on the steel corbel 9 and weld fixation steel plate and fix, described H section steel reinforcement supports step for weld suspension centre on H shaped steel, utilize wire rope by wire clips fixing oblique rope 7 between suspension centre and steel lattice column 6, top, described storehouse girder template installation steps are for passing through in the vertical rod of H shaped steel upper support, bridging is set between vertical rod fixes the girder soffit formwork, described girder reinforcing bar binding step is to design according to main beam structure, according to the technical requirements of " concrete structure engineering construction quality standards of acceptance " GB50204-2002 to reinforcing bar binding, carry out the layout and the colligation of girder reinforcing bar, described main beam concrete is built step for to support at the girder soffit formwork, the technical requirements of according to " concrete structure engineering construction quality standards of acceptance " GB50204-2002 main beam concrete being built after fixedly finishing, layering, building of main beam concrete carried out in gradation, described secondary beam and top board construction step utilize support and diagonal brace fixedly to build the template of secondary beam and top board on H shaped steel and sliding formwork platform 2 for build the back that finishes at main beam concrete, the template fixation, after the assembling reinforcement, carrying out secondary beam and top board again must build, described template and support system are removed step for treating girder, be girder after the secondary beam concrete solidifies fully, the secondary beam concrete strength reaches 100% o'clock of design strength, wire rope is unclamped and extract, remove the girder template, secondary beam and roof plate template, H shaped steel, and the steel lattice column exposed parts cut off.In main beam concrete pouring construction process, concreting is carried out in layering, gradation, forbid to touch template and reinforcing bar when vibrating, and build preceding, build neutralization and respectively the stress deformation of H shaped steel monitored after building, at girder four observation points are set vertically, measure once before building, measure once again after building half, measure once again after having built, and stay surveying record.The elongated twice H shaped steel that is provided with under the per pass girder supports, H shaped steel is apart from sliding formwork platform 300mm height, be connected firmly with channel-section steel every 2 meters between the H shaped steel and between H shaped steel and the bulkhead, channel-section steel and the welding of H shaped steel are fixing, and described suspension centre is arranged on the position of H shaped steel and determines according to calculating.The support of secondary beam and top board utilizes diagonal brace, and the template springing height is by designing requirement, and secondary beam and concrete roof are built together.

Claims (5)

1. construction method of large-diameter coal bunker flat-topping lid, it is characterized in that: its processing step is: 1. determining of H shaped steel and sliding formwork position of platform, and 2. coal bunker inner barn wall pre-embedded steel slab, 3. steel lattice column is pre-buried on the coal bunker bulkhead ring beam, 4. the sliding formwork platform descends, 5. the sliding formwork platform is fixed, and 6. welds the fixedly steel corbel of H shaped steel, and 7. H shaped steel is in place, 8. H section steel reinforcement, 9. girder template in top, storehouse is installed, 10. the girder reinforcing bar binding Main beam concrete is built, Secondary beam and top board construction, Template and support system are removed.
2. a kind of construction method of large-diameter coal bunker flat-topping lid according to claim 1, it is characterized in that: definite step of described H shaped steel and sliding formwork position of platform is for specifically determining the position of H shaped steel and sliding formwork platform at the design attitude of coal bunker according to coal bunker flat-topping lid main girder (8), described coal bunker inner barn wall pre-embedded steel slab step is for when coal bunker bulkhead (5) is poured into the precalculated position of H shaped steel (4) and sliding formwork platform (2), the steel plate of the steel plate (3) of pre-buried fixedly H shaped steel (4) and sliding formwork platform (2) on the inner barn wall of coal bunker bulkhead (5), the pre-buried step of described steel lattice column is for when building the apical ring beam of coal bunker bulkhead (5), the pre-buried steel lattice column (6) that exceeds the ring beam top on the coal bunker bulkhead apical ring beam of the both sides of storehouse lid main girder (8), described sliding formwork platform decline step is for after the coal bunker bulkhead apical ring beam of building solidifies, it is the sliding formwork position of platform that sliding formwork platform (2) is dropped to the following precalculated position of lid main girder (8) lower plane, storehouse, described sliding formwork platform fixing step is for after sliding formwork platform (2) drops to the precalculated position, fix sliding formwork platform (2) by welding sliding formwork platform steel corbel (1) on steel plate pre-buried on the inner barn wall of coal bunker bulkhead (5), the described welding fixedly steel corbel step of H shaped steel is to go up the fixedly steel corbel (9) of H shaped steel (4) of welding at the pre-buried steel plate (3) of the inner barn wall of coal bunker bulkhead (5), described H shaped steel step in place is after steel corbel (9) welding is good, H shaped steel (4) lifted steel corbel (9) is gone up and the welding fixation steel plate is fixed, described H section steel reinforcement supports step for weld suspension centre on H shaped steel, utilize wire rope by wire clips fixing oblique rope (7) between suspension centre and steel lattice column (6), top, described storehouse girder template installation steps are for passing through in the vertical rod of H shaped steel upper support, bridging is set between vertical rod fixes the girder soffit formwork, described girder reinforcing bar binding step is to design according to main beam structure, according to the technical requirements of " concrete structure engineering construction quality standards of acceptance " GB50204-2002 to reinforcing bar binding, carry out the layout and the colligation of girder reinforcing bar, described main beam concrete is built step for to support in the girder template, after fixing and reinforcing bar binding finishes, the technical requirements of main beam concrete being built according to " concrete structure engineering construction quality standards of acceptance " GB50204-2002, layering, building of main beam concrete carried out in gradation, described secondary beam and top board construction step are installed and reinforcing bar binding for the template of building finish laggard places beam and top board at main beam concrete, carry out the concreting of secondary beam and top board again, described template and support system are removed step for treating girder, be girder after the secondary beam concrete solidifies fully, the secondary beam concrete strength reaches 100% o'clock of design strength, wire rope is unclamped and extract, remove the girder template, secondary beam and roof plate template, H shaped steel, and the steel lattice column exposed parts cut off.
3. a kind of construction method of large-diameter coal bunker flat-topping lid according to claim 2, it is characterized in that: in main beam concrete pouring construction process, concreting is carried out in layering, gradation, forbid to touch template and reinforcing bar when vibrating, and build preceding, build neutralization and respectively the stress deformation of H shaped steel monitored after building, at girder four observation points are set vertically, measure once before building, measure once again after building half, measure once again after having built, and stay surveying record.
4. a kind of construction method of large-diameter coal bunker flat-topping lid according to claim 3, it is characterized in that: the elongated twice H shaped steel that is provided with under the per pass girder supports, H shaped steel is apart from sliding formwork platform 300mm height, be connected firmly with channel-section steel every 2 meters between the H shaped steel and between H shaped steel and the bulkhead, channel-section steel and the welding of H shaped steel are fixing, and described suspension centre is arranged on the position of H shaped steel and determines according to calculating.
5. a kind of construction method of large-diameter coal bunker flat-topping lid according to claim 4 is characterized in that: the support of secondary beam and top board utilizes diagonal brace, and the template springing height is by designing requirement, and secondary beam and concrete roof are built together.
CN2009100745390A 2009-06-24 2009-06-24 Construction method of large-diameter coal bunker flat-topping lid Expired - Fee Related CN101586465B (en)

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