CN1120102A - Variable-diameter cast-in-situ pile and its manufacture technology - Google Patents
Variable-diameter cast-in-situ pile and its manufacture technology Download PDFInfo
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- CN1120102A CN1120102A CN 95110003 CN95110003A CN1120102A CN 1120102 A CN1120102 A CN 1120102A CN 95110003 CN95110003 CN 95110003 CN 95110003 A CN95110003 A CN 95110003A CN 1120102 A CN1120102 A CN 1120102A
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Abstract
The diameter-variable cast-in-situ pile for high building comprises lime-clay-macadam bedding, one or more drilled piers composed of enlarged end, diameter-varying segments and straight segments and straight-line top segment and is constructed through such steps as ramming bedding, casting enlarged end, making different segments and binding and installing reinforcing cage. Said pile features increasing bearing power by several times, and greatly reducing cost.
Description
The present invention relates to a kind of variable-diameter cast-in-situ pile and manufacturing process thereof that is used for highrise building.
Since nearly half a century, pile foundation is widely used as the basis of highrise building or heavy type structure in countries in the world, to bear and to transmit building load.According to the job practices difference, pile foundation is divided into driven pile and in situ pile (or claiming common filling pile) two classes usually.Which kind of method pore-forming because common filling pile don't work, its hole wall soil all in the raw, hole wall soil only plays " template " effect to pile concrete, the bearing capacity of foundation soil of each soil layer that stake is passed fails to develop, and the stake end stands on the natural soil, if clear hole is unclean, in most cases the stake end always drops on the loosened soil, cause the common filling pile bearing capacity lower, bearing capacity of single pile is no more than 200 tons generally speaking.It is investigated, have not yet to see the existing above-mentioned defective of common filling pile improved report in addition.
Task of the present invention is to provide a kind of variable-diameter cast-in-situ pile and manufacturing process thereof, and this kind variable-diameter cast-in-situ pile structure uniqueness adopts special vibrating arm jolt ramming and changes the pile foundation load and distribute, and has fundamentally eliminated loosened soil at the bottom of the hole, thereby bearing capacity of single pile is improved greatly.
Variable-diameter cast-in-situ pile provided by the present invention is formed by stacking by dirt hardcore bed, one or several structure, measure-alike " boring pier " and top straightway, be that whole pile body is respectively bed course (1), bellend (2), reducer (3), straightway (4), reinforcing cage (5) and top straightway (6) from bottom to top, wherein bellend (2), reducer (3) and the combination of straightway (4) three parts constitute each boring pier respectively.Boring pier number is different and different according to bearing capacity: bearing capacity 500 ton hours are 2 boring piers, contain 1 to enlarge the footpath; Bearing capacity 700 ton hours are 3 boring piers, contain 2 and enlarge the footpath; Bearing capacity 1000 ton hours are 4 boring piers, contain 3 and enlarge the footpath.The pile body straightway directly is φ 800-1200mm, and enlarging position, footpath diameter is φ 1600m.Because this kind variable-diameter cast-in-situ pile has a plurality of expansions footpath, the stake lower end has the expansion pin, enlarge on the basic soil after the footpath is sitting in compression, enlarging pin stands on the dirt hardcore bed, and stake side surface concrete " sour jujube is protruding " is embedded in the hole wall soil after the densification, so pile body has increased a kind of lateral support power to the transfer mode of load than common filling pile, and end resistance and stake side grinding wipe a resistance and also enlarge markedly, thereby its bearing capacity and resistance to compression, flexural strength are improved greatly.
Variable-diameter cast-in-situ pile manufacturing process provided by the present invention is carried out according to the following steps:
(1) location unwrapping wire.Before the construction, press designing requirement sizing unwrapping wire on construction ground earlier, and carry out a stake position mark;
(2) pile driver centering in place.The Japan that repacking is good produces the auger align piles position mark on the dual-purpose pile driver of LS-78RS, and the hole errors of centration should be less than φ 20mm;
(3) start boring.Start spiral drilling machine boring, when hole depth reaches design elevation, stop to bore.Propose auger stem, put the aperture casing well;
(4) be lowered to vibrating arm.The auger stem clockwise direction is changeed 15 ° of angles, make center, the most advanced and sophisticated align piles hole of vibrating arm, the vibrating arm that avales makes its most advanced and sophisticated arrival at the bottom of the hole;
(5) beat the dirt hardcore bed.Open vibrating hammer, the vibrating arm tip 2.28m that avales is extruded a hole.Simultaneously, insert the dirt rubble that stirs in boring around vibrating arm, it highly must remain on about the above 2m in vibrating arm tip.Vibrating arm is promoted 2.28m, the 2.28m that avales again, 7 times so repeatedly, then bed course is made and is finished;
(6) beat the bellend of first " boring pier ".Vibrating arm is picked up high 0.78m at every turn instead insert 5 times, insert simultaneously and dilate concrete, adding dilates coagulation 1.02m altogether in manufacturing process
3
(7) make reducer.The vibrating arm first hoisting depth 0.5m instead inserts 2 times, and the second hoisting depth 1m instead inserts 2 times, inserts simultaneously and dilates concrete, adds altogether to dilate concrete 0.78m in manufacturing process
3
(8) make straightway.Promote vibrating arm 1.76m, adding dilates concrete 0.3m
3, once insert i.e. making and finish.
More than (6), (7), (8) three steps lump together to making the program of first boring pier, repeat said procedure can make respectively second and third, four boring piers.
(9) make the top straightway.Promote vibrating arm 1.34m, adding dilates concrete 0.16m
3, once insert i.e. making and finish.So far, whole pile is promptly made and is finished.After stake made, health can be done a last engineering in 20 days.
(10) making of reinforcing cage and installation.The making of reinforcing cage must meet the requirement of GBJ204-83 (" reinforced concrete construction and standards of acceptance "), the long 8m of reinforcing cage, also can with the isometric setting of pile body, should when the pile body height reaches 6.5m, transfer in the hole, connect above-mentioned system stake program then and continue the system stake up to concordant with ground.For preventing reinforcing cage displacement or destruction, can add protective casing in the reinforcing cage inboard in case of necessity, to carry in the rising gradually of sleeve pipe with stake, stake also all proposes to the top sleeve pipe.
Variable-diameter cast-in-situ pile provided by the present invention is rational in infrastructure, has brought into play the supporting capacity of foundation soil and stake self to greatest extent.Compare with common filling pile, bearing capacity can improve several times, and cost reduces significantly, adopts this kind castinplace pile can obtain huge economic benefit and social benefit.The appearance of this kind bored concrete pile technology is that high-building construction has opened prospect well out-of-the-way, is suitable for extensive employing.
Figure is the structural representation of variable-diameter cast-in-situ pile.
Special vibrating arm structural representation and A-A view thereof that Fig. 2,3 is adopted when being respectively the system stake.
Below in conjunction with accompanying drawing enforcement of the present invention is described further.
The thick 2.28m of the bed course of variable-diameter cast-in-situ pile of the present invention (1), jolt ramming is compacted repeatedly with vibrating arm by inserting a hole after quicklime, clay and the stirring of rubble mixing, and the proportioning of three kinds of compositions is 3: 7: 10.Pile body is made of the C40 harsh concrete, and the bellend (2) of its each boring pier is cylindrical, and the bottom is an inverted cone, high 0.78m, radius 0.8m; Reducer (3) is positive truncated cone-shaped, high 1m, and radius of the upper and lower end is respectively 0.4m and 0.8m, and straightway (4) is cylindrical, high 1.76m, radius 0.4m.Top straightway (5) is cylindrical, high 1.34m, radius 0.4m.In system stake process, the hoisting depth of vibrating arm and anti-slotting number of times are determined by the shape of penetration concrete amount and hole enlargement, so moving up and down of vibrating arm must be moved with the anti-number of times of inserting by the hoisting depth of design in strictness during each operation, can not beat morely and can not beat less, pile driver is controlled by computer, automatically operation.After the start, by 4 operators from 4 directions in the stake hole ceaselessly the C40 harsh concrete that stirs of backfill get final product.The manufacturing of this variable-diameter cast-in-situ pile need be adopted special vibrating arm, and (see Fig. 2, Fig. 3) make with φ 426 seamless steel pipes (7) that its underpart 4 faults are offered and are equipped with 16 wild goose wings (8), bottom (9) become 40 ° of circular cone wedge angles to this kind vibrating arm.This vibrating arm is installed on the 601 type vibrating hammers of Beijing, and vibrating hammer then is installed in Japan and produces on the dual-purpose pile driver of LS-78RS, and when opening vibrating hammer, under the pressure of the most advanced and sophisticated 13MPa of vibrating arm, near the concrete it is shaken close compacted.
Claims (6)
1, a kind of variable-diameter cast-in-situ pile that is used for highrise building, it is characterized in that, this kind castinplace pile is formed by stacking by the boring pier and the top straightway of dirt hardcore bed, one or several same structure, size, be that whole pile body is made up of bed course (1), bellend (2), reducer (3), straightway (4), reinforcing cage (5) and top straightway (6) from bottom to up, wherein bellend (2), reducer (3), the combination of straightway (4) three parts constitute each boring pier respectively, boring pier number can be 2-4 according to the bearing capacity difference, and enlarging the footpath is 1-3.
2, a kind of manufacturing process that is used for the variable-diameter cast-in-situ pile of highrise building, it is characterized in that, this technology comprise location unwrapping wire, pile driver centering in place, start boring, down eight vibrating arms, beat the dirt hardcore bed, the bellend of the hole pier of drilling, make reducer, make straightway, fabrication and installation reinforcing cage and make top straightway totally 10 steps, the hole pier bellend of wherein drilling, make reducer, make three steps of straightway and look the corresponding repetition several of boring pier number.
3, variable-diameter cast-in-situ pile according to claim 1 is characterized in that, the thick 2.28m of bed course (1); The bellend (2) of each boring pier is cylindrical, and the bottom is a turbination, high 0.78m, radius 0.8m; Reducer (3) is positive truncated cone-shaped, high 1m, and radius of the upper and lower end is respectively 0.4m and 0.8m; Straightway (4) is cylindrical, high 1.76m, radius 0.4m; Top straightway (5) is cylindrical, high 1.34m, radius 0.4m.
4, variable-diameter cast-in-situ pile manufacturing process according to claim 2 is characterized in that, in system stake process, the hoisting depth of vibrating arm and anti-slotting number of times must strict be undertaken by design code during each operation, and pile driver moves automatically with computer control; Meanwhile, by 4 directions concrete of stirring of backfill ceaselessly in the stake hole.
5, variable-diameter cast-in-situ pile manufacturing process according to claim 2 is characterized in that, pile body adopts the C40 harsh concrete to make, and bed course adopts quicklime, clay and rubble mixture to make, and the proportioning of three kinds of compositions is 3: 7: 10.
6, variable-diameter cast-in-situ pile manufacturing process according to claim 2 is characterized in that, need adopt special vibrating arm during the system stake, and this kind vibrating arm is made with φ 426 seamless steel pipes, and its underpart 4 faults are offered and are equipped with 16 wild goose wings, and the bottom becomes 40 ° of circular cone wedge angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110003 CN1061728C (en) | 1995-01-06 | 1995-01-06 | Variable-diameter cast-in-situ pile and its manufacture technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110003 CN1061728C (en) | 1995-01-06 | 1995-01-06 | Variable-diameter cast-in-situ pile and its manufacture technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1120102A true CN1120102A (en) | 1996-04-10 |
| CN1061728C CN1061728C (en) | 2001-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95110003 Expired - Fee Related CN1061728C (en) | 1995-01-06 | 1995-01-06 | Variable-diameter cast-in-situ pile and its manufacture technology |
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| CN (1) | CN1061728C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035960C (en) * | 1995-08-04 | 1997-09-24 | 湖南省建筑科学研究所 | Compound pile foundation |
| CN100434595C (en) * | 2006-07-21 | 2008-11-19 | 刘润郊 | Piling method and piling device for borehole pump pouring large flow concrete ring pile |
| CN102561332A (en) * | 2012-02-09 | 2012-07-11 | 东南大学 | Continuous variable-diameter cement-soil mixed pile forming method |
| CN102912793A (en) * | 2012-10-15 | 2013-02-06 | 中冶交通工程技术有限公司 | Construction method of reducing cast-in-place pile |
| CN103233464A (en) * | 2013-04-27 | 2013-08-07 | 宁波市市政设施建设开发有限公司 | Manual hole digging pile and construction method thereof |
| CN103711130A (en) * | 2013-12-17 | 2014-04-09 | 上海岩土工程勘察设计研究院有限公司 | Portal frame type bamboo joint mortar pile enclosure structure and construction method thereof |
| CN105002889A (en) * | 2015-07-02 | 2015-10-28 | 盘锦红海实业集团有限公司 | Preloading harsh concrete pile construction method and control system |
| CN106498939A (en) * | 2015-09-06 | 2017-03-15 | 北京四维星科技有限责任公司 | A kind of vibro-rammer bottom is swollen footpath dry concrete cast-in-place pile construction method |
-
1995
- 1995-01-06 CN CN 95110003 patent/CN1061728C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035960C (en) * | 1995-08-04 | 1997-09-24 | 湖南省建筑科学研究所 | Compound pile foundation |
| CN100434595C (en) * | 2006-07-21 | 2008-11-19 | 刘润郊 | Piling method and piling device for borehole pump pouring large flow concrete ring pile |
| CN102561332A (en) * | 2012-02-09 | 2012-07-11 | 东南大学 | Continuous variable-diameter cement-soil mixed pile forming method |
| CN102561332B (en) * | 2012-02-09 | 2014-01-22 | 东南大学 | Continuous variable-diameter cement-soil mixed pile forming method |
| CN102912793A (en) * | 2012-10-15 | 2013-02-06 | 中冶交通工程技术有限公司 | Construction method of reducing cast-in-place pile |
| CN103233464A (en) * | 2013-04-27 | 2013-08-07 | 宁波市市政设施建设开发有限公司 | Manual hole digging pile and construction method thereof |
| CN103233464B (en) * | 2013-04-27 | 2015-05-20 | 宁波市市政设施景观建设有限公司 | Manual hole digging pile and construction method thereof |
| CN103711130A (en) * | 2013-12-17 | 2014-04-09 | 上海岩土工程勘察设计研究院有限公司 | Portal frame type bamboo joint mortar pile enclosure structure and construction method thereof |
| CN103711130B (en) * | 2013-12-17 | 2016-08-31 | 上海岩土工程勘察设计研究院有限公司 | Portal frame type bamboo joint mortar pile enclosure structure and construction method thereof |
| CN105002889A (en) * | 2015-07-02 | 2015-10-28 | 盘锦红海实业集团有限公司 | Preloading harsh concrete pile construction method and control system |
| CN106498939A (en) * | 2015-09-06 | 2017-03-15 | 北京四维星科技有限责任公司 | A kind of vibro-rammer bottom is swollen footpath dry concrete cast-in-place pile construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1061728C (en) | 2001-02-07 |
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