CN102304915A - New method for controlling top quality of drilled pile - Google Patents
New method for controlling top quality of drilled pile Download PDFInfo
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- CN102304915A CN102304915A CN201110179305A CN201110179305A CN102304915A CN 102304915 A CN102304915 A CN 102304915A CN 201110179305 A CN201110179305 A CN 201110179305A CN 201110179305 A CN201110179305 A CN 201110179305A CN 102304915 A CN102304915 A CN 102304915A
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Abstract
The invention discloses a novel method for controlling top quality of a drilled pile. When a protecting canister is buried, the buried depth of the protecting canister is 45 to 55 centimeters below the pile top elevation, and the top of the protecting canister is 30 to 40 centimeters higher than a drilling platform; after the protecting canister is buried and a hole is formed, the drilled pile is poured by a conventional method; and when the concrete height reaches the pile top elevation is determined by using a measuring spoon, pouring is stopped, the laitance of the top is pumped away by adopting a slurry pump, and dry hole pouring is performed. After the concrete is poured to the pile top elevation, vibration is performed; and after the concrete is initially set, the protecting canister is pulled out. When a bearing platform is constructed, the construction of the lower part can be performed only by clearing the concrete of the surface. By the method, the consumption of the concrete can be reduced, hole collapse of the loose geology at the pile top is prevented, a mushroom pile at the pile top is prevented, meanwhile, the pile breaking process is saved, the engineering cost is saved, and the work efficiency is improved. The method is suitable for pile foundation top pouring construction of all bridges, and is suitable for rotary drilling, positive and negative circular drilling and mechanical construction drilling of percussion drills.
Description
Technical field
The present invention relates to bored piles top quality control new method, the control stake end face absolute altitude of more specifically saying so guarantees the pile crown construction quality, practices thrift the method that the pile crown concrete is avoided waste.
Background technology
Bored piles top quality control new method; Be to present pile foundation construction; Not in place because of place leveling compacting, geological conditions is loose near the drilled pile top, only can guarantee most of heights of roofs and most of one-tenth pile concrete height of pile according to present drilled pile construction control method.But in most cases be to have wasted a large amount of concrete.Also most the existence because of early pulling out the i.e. stake top enlarged diameter in mushroom stake top that casing causes; Clamp-on a top concrete because of early pulling out the bad earth that causes of casing geological condition; The loose segregation of concrete causes the downward a series of imaginations such as pile crown, and pile extension of instead cutting a hole of needs when breaking pile crown when pouring into because of the underwater concrete top.
Up to now, because above these reasons cause the stake top behind the cushion cap excavation very strange, come in every shape, the smooth linking that has caused delaying the bottom construction sequence is carried out, and for example a broken difficulty has strengthened when the mushroom stake occurring, and the time is elongated, and cost has increased.And the pile crown of abolishing with form in the past is often because cause a large amount of main muscle of stake to damage and phenomenons such as stake top arrisdefect is imperfect in cutting the stake process.
Summary of the invention
The present invention provides a kind of bored piles top quality control new method, adopts the inventive method to carry out top application man-hour, can practice thrift whole cost, guarantees a stake top presentation quality simultaneously again.
Technical solution problem of the present invention adopts following technical scheme:
Quality control new method in bored piles top is characterized in that: operation as follows:
A, carry out the drilled pile construction work of casing before burying underground by conventional method;
B, bury casing underground, requirement, when casing was buried underground, the casing depth of burying will be goed deep into a following 45-55cm of top mark height, and the casing top exceeds 30-40cm than drilling platform;
After c, casing are buried underground, hole, pour into mud, in time replenish the mud of loss, leakage, make it height portal outer water level or groundwater table 1.0～1.5m by conventional method; Guarantee the concentration of hydraulic mixture in the boring, prevent the hole that collapses, quality accidents such as shrinkage cavity;
D, boring finish clear hole, back, put into reinforcing cage and carry out the underwater concrete perfusion; Confirm that the concrete height reaches a top mark and stops perfusion when high;
E, mud in the hole is extracted out, stopped to take out slurry when waiting to see the fresh concrete slurry with slush pump; In the residual concrete injection hole, utilize and to fiddle with excellent layering and shake admittedly, treat that concrete reaches when exceeding 20cm than stake top mark height and stop to vibrate, remove the end face laitance;
F, casing is extracted after waiting to reach concrete initial set, with earthen backfill to original ground.
Described bored piles top quality control new method is characterized in that: when said step b buried casing underground, the casing depth of burying will be goed deep into a following 50cm of top mark height.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, reduces stake and pushed up 1 meter invalid stake long concrete, reduced construction cost.
2, it is long that the inventive method need not abolished the above invalid stake in stake top, promptly makes pile foundation master muscle be effectively protected, and shortened the engineering time simultaneously, further practiced thrift construction cost.
3, adopt the inventive method keyhole stake stake top quality, can prevent a loose place, the top hole phenomenon that occurs collapsing that is in of geology, effectively prevent to eject existing mushroom stake phenomenon in stake.
4, the inventive method specifically can be used in the drilled pile engineering of length less than all mechanical means constructions of 4 meters at the bottom of the cushion cap at original ground.
The specific embodiment
Bored piles top quality control new method, operation as follows:
A, carry out the drilled pile construction work of casing before burying underground by conventional method;
B, bury casing underground, requirement, when casing was buried underground, the casing depth of burying will be goed deep into a following 45-55cm of top mark height, and the casing top exceeds 30-40cm than drilling platform;
After c, casing are buried underground, hole, pour into mud, in time replenish the mud of loss, leakage, make it height portal outer water level or groundwater table 1.0～1.5m by conventional method; Guarantee the concentration of hydraulic mixture in the boring, prevent the hole that collapses, quality accidents such as shrinkage cavity;
D, boring finish clear hole, back, put into reinforcing cage and carry out the underwater concrete perfusion; Confirm that the concrete height reaches a top mark and stops perfusion when high;
E, mud in the hole is extracted out, stopped to take out slurry when waiting to see the fresh concrete slurry with slush pump; In the residual concrete injection hole, utilize and to fiddle with excellent layering and shake admittedly, treat that concrete reaches when exceeding 20cm than stake top mark height and stop to vibrate, remove the end face laitance;
F, casing is extracted after waiting to reach concrete initial set, with earthen backfill to original ground.
Construction point is following:
1, preparation lengthening casing:
Select for use the thick steel plate of 2cm to be bent into steel casing, hanger is set on casing, guarantee that casing prevents that by adminicle assurance is stable, so that extract behind the concrete initial set than the big 20cm in stake footpath.
2, the construction survey spoon is measured:
After normally being filled into a top mark height; Utilize measurement spoonful (measuring spoon is to have scale) calculating earlier to push up stake top length by casing well; Utilize measurement spoon high scale to confirm to measure spoon again and fish for concrete position; There is coarse aggregate such as stone to get final product when on this height, guaranteeing to pull out top of concrete, guarantees that effective length avoids repeatedly concrete perfusion.
3, extract laitance:
Utilize slush pump that mud in the hole is exhausted, have the concrete grout position, again with measuring spoon checking height and confirming whether concrete has reached the layer that aggregate is arranged up to the mud of seeing eliminating.
4, vibrate and pour into the residue concrete:
Vibrate with vibrating spear, and confirm absolute altitude, institute's shortcoming concrete delamination is injected, and vibrate, guarantee that finally concrete surface is than the high 10cm of design by routine with lining rope.
5, pull out the casing backfill
Treat behind the concrete initial set casing to be extracted, and carry out backfill with near drilling slurry soil.
Claims (2)
1. bored piles top quality control new method is characterized in that: operation as follows:
A, carry out the drilled pile construction work of casing before burying underground by conventional method;
B, bury casing underground, requirement, when casing was buried underground, the casing depth of burying will be goed deep into a following 45-55cm of top mark height, and the casing top exceeds 30-40cm than drilling platform;
After c, casing are buried underground, hole, pour into mud, in time replenish the mud of loss, leakage, make it height portal outer water level or groundwater table 1.0～1.5m by conventional method; Guarantee the concentration of hydraulic mixture in the boring, prevent the hole that collapses, quality accidents such as shrinkage cavity;
D, boring finish clear hole, back, put into reinforcing cage and carry out the underwater concrete perfusion; Confirm that the concrete height reaches a top mark and stops perfusion when high;
E, mud in the hole is extracted out, stopped to take out slurry when waiting to see the fresh concrete slurry with slush pump; In the residual concrete injection hole, utilize and to fiddle with excellent layering and shake admittedly, treat that concrete reaches when exceeding 20cm than stake top mark height and stop to vibrate, remove the end face laitance;
F, casing is extracted after waiting to reach concrete initial set, with earthen backfill to original ground.
2. bored piles according to claim 1 top quality control new method is characterized in that: when said step b buried casing underground, the casing depth of burying will be goed deep into a following 50cm of top mark height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110179305 CN102304915B (en) | 2011-06-29 | 2011-06-29 | New method for controlling top quality of drilled pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110179305 CN102304915B (en) | 2011-06-29 | 2011-06-29 | New method for controlling top quality of drilled pile |
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| CN102304915A true CN102304915A (en) | 2012-01-04 |
| CN102304915B CN102304915B (en) | 2013-05-01 |
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| CN 201110179305 Active CN102304915B (en) | 2011-06-29 | 2011-06-29 | New method for controlling top quality of drilled pile |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088832A (en) * | 2013-02-21 | 2013-05-08 | 北京鑫实路桥建设有限公司 | Annular type impact method for digging rock at bottom of drilled pile shaft |
| CN105887887A (en) * | 2016-01-27 | 2016-08-24 | 济南城建集团有限公司 | Underwater concrete grouting pile top elevation control construction method |
| CN109778843A (en) * | 2019-01-29 | 2019-05-21 | 中建八局轨道交通建设有限公司 | Cast-in-place pile concrete perfusion top surface control and pile crown pull out construction method |
| CN111910622A (en) * | 2020-07-13 | 2020-11-10 | 毕竞东 | Construction method of bored pile without pile head |
| CN111997058A (en) * | 2020-08-04 | 2020-11-27 | 中电建十一局工程有限公司 | Construction method for preventing pile top concrete from chiseling and over-grouting |
| CN114991129A (en) * | 2022-06-16 | 2022-09-02 | 广西建工集团第三建筑工程有限责任公司 | Device for quickly removing floating slurry of pile head of cast-in-place pile |
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| DE3343961A1 (en) * | 1983-12-06 | 1985-06-20 | Gkn Keller Gmbh, 6050 Offenbach | Method of producing piles or pile-like bodies |
| JP2001248154A (en) * | 2000-03-07 | 2001-09-14 | Tokyu Constr Co Ltd | Method of processing pile head, head structure of cast-in- place concrete pile, and form for processing pile head, for use in method of constructing cast-in-place concrete pile |
| CN1831250A (en) * | 2005-03-07 | 2006-09-13 | 徐州工程机械科技股份有限公司徐工研究院 | Construction technology of dry soil taking hole forming method of rotary digging drilling machine |
| CN101487252A (en) * | 2009-02-13 | 2009-07-22 | 中建八局第一建设有限公司 | Construction process of cast-in-situ bored pile |
| CN101838993A (en) * | 2010-05-17 | 2010-09-22 | 中铁二十局集团有限公司 | Construction technology of steel sheet pile cofferdam for Yellow River Channel internal support table construction |
| CN101876171A (en) * | 2010-04-29 | 2010-11-03 | 中交隧道工程局有限公司 | New method for water washing and decomposing to break pile head of bridge pile foundation |
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2011
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| DE3343961A1 (en) * | 1983-12-06 | 1985-06-20 | Gkn Keller Gmbh, 6050 Offenbach | Method of producing piles or pile-like bodies |
| JP2001248154A (en) * | 2000-03-07 | 2001-09-14 | Tokyu Constr Co Ltd | Method of processing pile head, head structure of cast-in- place concrete pile, and form for processing pile head, for use in method of constructing cast-in-place concrete pile |
| CN1831250A (en) * | 2005-03-07 | 2006-09-13 | 徐州工程机械科技股份有限公司徐工研究院 | Construction technology of dry soil taking hole forming method of rotary digging drilling machine |
| CN101487252A (en) * | 2009-02-13 | 2009-07-22 | 中建八局第一建设有限公司 | Construction process of cast-in-situ bored pile |
| CN101876171A (en) * | 2010-04-29 | 2010-11-03 | 中交隧道工程局有限公司 | New method for water washing and decomposing to break pile head of bridge pile foundation |
| CN101838993A (en) * | 2010-05-17 | 2010-09-22 | 中铁二十局集团有限公司 | Construction technology of steel sheet pile cofferdam for Yellow River Channel internal support table construction |
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| 中国建筑科学研究院: "《建筑桩基技术规范JGJ94-2008》", 22 April 2008, article "灌注桩施工", pages: 48-50 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088832A (en) * | 2013-02-21 | 2013-05-08 | 北京鑫实路桥建设有限公司 | Annular type impact method for digging rock at bottom of drilled pile shaft |
| CN105887887A (en) * | 2016-01-27 | 2016-08-24 | 济南城建集团有限公司 | Underwater concrete grouting pile top elevation control construction method |
| CN109778843A (en) * | 2019-01-29 | 2019-05-21 | 中建八局轨道交通建设有限公司 | Cast-in-place pile concrete perfusion top surface control and pile crown pull out construction method |
| CN111910622A (en) * | 2020-07-13 | 2020-11-10 | 毕竞东 | Construction method of bored pile without pile head |
| CN111997058A (en) * | 2020-08-04 | 2020-11-27 | 中电建十一局工程有限公司 | Construction method for preventing pile top concrete from chiseling and over-grouting |
| CN111997058B (en) * | 2020-08-04 | 2021-11-23 | 中电建十一局工程有限公司 | Construction method for preventing pile top concrete from chiseling and over-grouting |
| CN114991129A (en) * | 2022-06-16 | 2022-09-02 | 广西建工集团第三建筑工程有限责任公司 | Device for quickly removing floating slurry of pile head of cast-in-place pile |
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|---|---|
| CN102304915B (en) | 2013-05-01 |
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