CN1296569C - PHC pile and water flush gas lift static pressure pile-sinking method - Google Patents
PHC pile and water flush gas lift static pressure pile-sinking method Download PDFInfo
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- CN1296569C CN1296569C CNB2004100611069A CN200410061106A CN1296569C CN 1296569 C CN1296569 C CN 1296569C CN B2004100611069 A CNB2004100611069 A CN B2004100611069A CN 200410061106 A CN200410061106 A CN 200410061106A CN 1296569 C CN1296569 C CN 1296569C
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Abstract
The present invention relates to a novel PHC pile and a water flushing and gas lifting static pressure pile sinking method, which solves the problem that when the existing pile sinking method is used, a pile can not sink when the pile encounters sand and hard rubble layers. The present invention provides the novel PHC pile and the water flushing and gas lifting static pressure pile sinking method, which is characterized in that a PHC pile can be conveniently and quickly used in low cost to be sunk. The method of the present invention comprises the following steps: 1) a static pressure pile sinking method is adopted in a soft soil layer on the ground surface; 2) a water flushing and gas lifting static pressure pile sinking method is adopted in a sand layer or a crushed gravel layer; 3) after a pile tip penetrates through the sand layer or the crushed gravel layer to be in contact with the soft soil layer, the water injection is stopped, and then, a pile is pressed into soft soil only by static pressure to be sunk in a design elevation; in addition, when the pile is sunk in a sandstone layer foundation without soft soil below the sand layer or the crushed gravel layer, the water injection is stopped when the pile is sunk to the last 1 to 2 meters, and then, the pile is pressed the design elevation only by static pressure. Compared with a punching (drilling) filling pile, the manufacturing cost of the present invention is saved by 40 to 50%, and the engineering quality, the construction period and the environmental protection performance are more superior; the pile of the present invention can penetrates through all covering layers, and a pile end can be quickly sunk into an ideal bearing layer.
Description
Technical field:
The present invention relates to a kind of novel PHC stake and water qi of chong channel ascending adversely and lift pile jacking in method.
Background technology:
In the building pile foundation engineering of city, because of producing noise, hammer piling is unfavorable for environmental protection, in recent years extensively adopted static pressure sinking PHC piling method, this method is applicable to the soft foundation that does not have sand or crushed gravel hard interbedded layer, to ground and sharp sand or the crushed gravel ground that sand or crushed gravel hard formation are arranged in the soft foundation, excessive to penetrating resistance because of sand stone layer, static pressure PHC stake can't be passed through sand or crushed gravel layer, this method is just of no use, and this moment, pile sinking just became an insurmountable difficult problem.
In the soft foundation, often run under sand or the crushed gravel hard formation and to also have weak soil layer, the building that load is big or important, because of settling amount and differential settlement strict, its foundation pile not only will pass through sand stone layer, also will pass the weak soil layer under it, and the stake end is placed darker desirable bearing stratum.At this point under the matter condition,, only use quality instead and be not so good as the PHC stake and high the dashing of cost (brill) hole pouring pile because of static pressure PHC stake can't pass sand stone layer.Same engineering adopts towards (brill) hole pouring pile than adopting PHC stake cost will increase by 40～50%, in view of two kinds of stake type cost difference great disparities and workmanship needs, urgent need works out the method for PHC stake by sand or crushed gravel hard formation, and the short PHC stake of super quality and competitive price duration being substituted dash (brill) hole pouring pile is the hot subject of current pile foundation engineering.
Summary of the invention:
The invention solves the above-mentioned difficult problem of existing in prior technology, provide a kind of and can use the novel PHC stake of PHC sunk pile and water qi of chong channel ascending adversely to lift pile jacking in method easily and fast, at low cost.
Technical scheme of the present invention is as follows:
1, pile jacking in method is lifted in the water qi of chong channel ascending adversely, it is characterized in that:
The first step, ground surface weak soil layer pile sinking adopt static pressure to bury, and static pressure is not to till a stake pressure is sunk with maximum pile driving pressure;
Second step, the stake point sinks when reaching sand or crushed gravel layer, insert the aqueous vapor compound tube from the stake top to hollow cavity, after the aqueous vapor compound tube sinks and reaches a point, import water under high pressure and compressed air respectively to water-supply-pipe and appendix, water under high pressure penetrates from stake point weep hole, and the sand and the crushed gravel that directly wash away a crack tip form the sandstone mixing water; The nationality gas lift method is discharged the sandstone mixing water from bottom to top along the hollow cavity of stake from the stake top, just can sink to stake sand and crushed gravel layer with less pile driving pressure this moment, Yi Bian import water under high pressure and compressed air thus, Yi Bian add static pressure, sand stone layer passed in stake;
The 3rd step after the stake point passes sand and crushed gravel layer, when arriving the weak soil layer, stopped jetting, and only the nationality static pressure is passed weak soil with stake and sunk to design elevation; Perhaps, to there not being the sand stone layer ground pile sinking of weak soil under sand and the crushed gravel layer, pile sinking stops jetting to last 1～2 meter of sand stone layer, and pure static pressure is to design elevation.
2, novel PHC stake: a kind of novel PHC stake with hollow cavity is characterized in that: be provided with the stake point of hollow back taper the end in the stake of PHC stake, have weep hole at the front end of stake point, partly have backwater hole at the awl body of stake point; Be equipped with weep hole piston and the backwater hole piston that complements one another with it at weep hole and backwater hole place, in hollow cavity, be provided with the aqueous vapor compound tube.
The present invention has following advantage:
(1) method is easy, cost is low, and easy operating uses, and can effectively reduce penetrating resistance, makes stake pass sand smoothly and the crushed gravel layer sinks to design elevation always.
(2), the same engineering pile sinking method that adopts PHC stake of the present invention dashes (brills) hole pouring pile and saves cost 40～50% than adopting, the former is more more superior than the latter for while workmanship, duration and environmental protection aspect.
(3), sand or crushed gravel ground pile sinking are had unique effect, stake can penetrate any covering layer, the stake end can be sunk quickly reach desirable bearing stratum.
Description of drawings:
Fig. 1 is the structure sectional view of an embodiment of the present invention.
Fig. 2 is the structure for amplifying sectional view of stake point.
Fig. 3 is the local enlarged side view of Fig. 1.
Fig. 4 is the jetting nozzle of water conveyance steel tube and gas transmission pipe.
Fig. 5 is the structural representation of gas outlet.
Label declaration: at the bottom of 1 pile body, 2 tops, 3, the bend pipe of 4 points, 5 weep holes, 6 backwater holes, 7 weep hole pistons, 8 backwater hole pistons, 9 hollow cavitys, 10 water conveyance steel tubes, 10` water delivery hose, 11 gas transmission pipes, 11` airline hose, 12 water deliverys and gas transmission pipes, 13 aqueous vapor compound tube joints, 14 gas outlets, 15 flap valve, 16 jetting nozzles, 17 sharp reinforcing ribs.
The specific embodiment:
Shown in Fig. 1-5: PHC stake of the present invention is a kind of novel PHC stake with hollow cavity 9, it is characterized in that: the stake in the PHC stake is provided with hollow back taper stake point 4 in an end 3, has weep hole 5 at the front end of stake point 4, partly has backwater hole 6 at the awl body of stake point 4; Be equipped with weep hole piston 7 and the backwater hole piston 8 that complements one another with it at weep hole 5 and backwater hole 6 places, in hollow cavity 9, be provided with the aqueous vapor compound tube, the aqueous vapor compound tube is fused by aqueous vapor compound tube joint 13 by water conveyance steel tube 10 and gas transmission pipe 11 and forms, the water inlet end of water conveyance steel tube 10 and gas transmission pipe 11 and inlet end are provided with the bend pipe 12 of water delivery and gas transmission pipe, water inlet end at the bend pipe 12 of water delivery and gas transmission pipe is connected water delivery hose 10` and airline hose 11` respectively with inlet end, in the water side of water conveyance steel tube 10 jetting nozzle 16 is housed, the jetting nozzle 16 of water conveyance steel tube 10 is near the weep hole 5 of PHC stake, in the outlet side of gas transmission pipe 11 gas outlet 14 is housed, on the outside wall surface of stake point 4, is provided with the sharp reinforcing rib 17 of stake.Pile body 1 connects into a pile or by the stake of number joint and saves stake from becoming a pile according to the pile length needs, and corresponding aqueous vapor compound tube also is made up of a number pipe joint or a pipe joint.
Embodiment 1:
The first step, ground surface weak soil layer pile sinking adopt static pressure to bury.Static pressure is not to till a stake pressure is sunk with maximum pile driving pressure.The heavy end face that reaches sand or crushed gravel layer of stake this moment point.
In second step, the stake point sinks when reaching sand or crushed gravel layer, inserts the aqueous vapor compound tube from stake top 2 to hollow cavity 9, as shown in Figure 1.The aqueous vapor compound tube is imported water under high pressure and compressed air respectively to water delivery hose and airline hose after sinking and reaching a point, and water under high pressure penetrates from stake point weep hole, and the sand and the crushed gravel that directly wash away a crack tip form the sandstone mixing water; The nationality gas lift method is discharged the sandstone mixing water from bottom to top along the hollow cavity of stake from the stake top, behind water discharge sandstone, penetrating resistance subtracts greatly, and just can sink to stake sand and crushed gravel layer with less pile driving pressure this moment.Import water under high pressure and compressed air on one side thus,, just can successfully stake be passed sand and crushed gravel layer Yi Bian add static pressure.
The 3rd step after the stake point passes sand and crushed gravel layer, when arriving the weak soil layer, stopped jetting, and only the nationality static pressure is passed weak soil with stake and sunk to design elevation.
To there not being the sand stone layer ground pile sinking of weak soil under sand and the crushed gravel layer, its pile sinking operation lacked for the 3rd step, but pile sinking stops jetting to last 1～2 meter, and pure static pressure is to design elevation.
About pile sinking equipment
Pile sinking equipment of the present invention: except that static pile press, high-pressure hydraulic pump, air compressor and aqueous vapor compound tube etc. are arranged.
Stake sharp weep hole 5 and backwater hole 6 places set out water hole piston 7 and backwater hole piston 8, see shown in Figure 2ly, and purpose prevents that in the first step pile driving process earth from entering the hollow cavity 9 of stake, helps the heavy smoothly stake point that reaches of aqueous vapor compound tube.When second step, pile sinking began jetting, nationality jetting pressure was discharged piston 7 and 8 outside the pile body.Jetting nozzle and gas outlet place is provided with flap valve 15, sees shown in Figure 4ly, and purpose is in the jetted pile process, and barrier is cut off the water and stopped the supple of gas or steam for some reason, prevents that sandstone from pouring in the aqueous vapor pipe, avoids pipeline blockage.
Claims (7)
1, pile jacking in method is lifted in the water qi of chong channel ascending adversely of novel PHC stake, it is characterized in that:
The first step, ground surface weak soil layer pile sinking adopt static pressure to bury, and static pressure is not to till a stake pressure is sunk with maximum pile driving pressure;
Second step, the stake point sinks when reaching sand or crushed gravel layer, insert the aqueous vapor compound tube from the stake top to hollow cavity, after the aqueous vapor compound tube sinks and reaches a point, import water under high pressure and compressed air respectively to water-supply-pipe and appendix, water under high pressure penetrates from stake point weep hole, and the sand and the crushed gravel that directly wash away a crack tip form the sandstone mixing water; The nationality gas lift method is discharged the sandstone mixing water from bottom to top along the hollow cavity of stake from the stake top, just can sink to stake sand and crushed gravel layer with less pile driving pressure this moment, Yi Bian import water under high pressure and compressed air thus, Yi Bian add static pressure, sand stone layer passed in stake;
The 3rd step after the stake point passes sand and crushed gravel layer, when arriving the weak soil layer, stopped jetting, and only the nationality static pressure is passed weak soil with stake and sunk to design elevation; Perhaps, to there not being the sand stone layer ground pile sinking of weak soil under sand and the crushed gravel layer, pile sinking stops jetting to last 1～2 meter of sand stone layer, and pure static pressure is to design elevation.
2, the special utility PHC stake of pile jacking in method is lifted in water qi of chong channel ascending adversely according to claim 1, it is characterized in that: the stake point (4) that is provided with hollow back taper in the stake end (3) of PHC stake, have weep hole (5) at stake point (4) front end, partly have backwater hole (6) at the awl body of stake point (4); Locate to be equipped with weep hole piston (7) and the backwater hole piston (8) that complements one another with it at weep hole (5) and backwater hole (6), in hollow cavity (9), be provided with the aqueous vapor compound tube.
3, the special utility PHC stake of pile jacking in method is lifted in water qi of chong channel ascending adversely according to claim 2, and it is characterized in that: described aqueous vapor compound tube is made up of water conveyance steel tube (10) and gas transmission pipe (11).
4, the special utility PHC stake of pile jacking in method is lifted in water qi of chong channel ascending adversely according to claim 3, and it is characterized in that: water conveyance steel tube (10) and gas transmission pipe (11) fuse by aqueous vapor compound tube joint (13).
5, the special utility PHC stake of lifting pile jacking in method according to claim 3 or 4 described water qi of chong channel ascending adversely, it is characterized in that: the bend pipe (12) that the water inlet end of water conveyance steel tube (10) and gas transmission pipe (11) and inlet end are provided with water delivery and gas transmission pipe is connected water delivery hose (10`) and airline hose (11`) at the water inlet end of the bend pipe (12) of water delivery and gas transmission pipe respectively with inlet end.
6, the special utility PHC stake of pile jacking in method is lifted in water qi of chong channel ascending adversely according to claim 2, it is characterized in that: be provided with stake sharp reinforcing rib (17) on the outside wall surface of stake point (4).
7, the special utility PHC stake of pile jacking in method is lifted in water qi of chong channel ascending adversely according to claim 2, it is characterized in that: pile body (1) connects into a pile or by the stake of number joint and saves from becoming a pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100611069A CN1296569C (en) | 2004-11-09 | 2004-11-09 | PHC pile and water flush gas lift static pressure pile-sinking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100611069A CN1296569C (en) | 2004-11-09 | 2004-11-09 | PHC pile and water flush gas lift static pressure pile-sinking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1605684A CN1605684A (en) | 2005-04-13 |
| CN1296569C true CN1296569C (en) | 2007-01-24 |
Family
ID=34764426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100611069A Expired - Fee Related CN1296569C (en) | 2004-11-09 | 2004-11-09 | PHC pile and water flush gas lift static pressure pile-sinking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1296569C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100485134C (en) * | 2006-09-06 | 2009-05-06 | 刘小檀 | Construction technique for holding type PHC tube pile with tip entering into rock by augering technique |
| CN101498129B (en) * | 2008-01-31 | 2011-04-27 | 黄秋生 | Water-gas mixing jet apparatus for pile sinking |
| CN102182186B (en) * | 2011-04-28 | 2012-12-12 | 中交第一航务工程局有限公司 | Water-flushing sinking-assisting system and construction technical method thereof |
| CN103898911A (en) * | 2014-04-16 | 2014-07-02 | 哈尔滨亿海管桩有限公司 | Static pressure construction method for rough and fine hard sand bed concrete tubular pile |
| CN106703026A (en) * | 2015-11-18 | 2017-05-24 | 上海宝冶集团有限公司 | Height increasing method of concrete core of PHC (Prestressed High-intensity Concrete) pipe pile |
| CN108625372A (en) * | 2018-05-17 | 2018-10-09 | 深圳市工勘岩土集团有限公司 | Static-pressure prestressed drilled pile dense sand stratum high-pressure flush gas lift reverse circulation pilot hole pile sinking construction method |
| CN110820789A (en) * | 2019-11-21 | 2020-02-21 | 太原理工大学 | Synchronous water injection humidifying device for lime-soil compaction pile |
| CN112854203A (en) * | 2021-01-18 | 2021-05-28 | 中煤江南建设发展集团有限公司 | Static pressure pipe pile end self-leading hole construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB282820A (en) * | 1926-12-29 | 1928-08-30 | Alexander George Rotinoff | Improvements relating to caissons |
| GB332036A (en) * | 1929-06-24 | 1930-07-17 | Bratthwaite And Company Engine | Improvements in and relating to screw piles |
| CN1412391A (en) * | 2002-07-12 | 2003-04-23 | 天津大学 | Large-sized concrete cylindrical structure whose wall end possesses excavating device and sinking method |
-
2004
- 2004-11-09 CN CNB2004100611069A patent/CN1296569C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB282820A (en) * | 1926-12-29 | 1928-08-30 | Alexander George Rotinoff | Improvements relating to caissons |
| GB332036A (en) * | 1929-06-24 | 1930-07-17 | Bratthwaite And Company Engine | Improvements in and relating to screw piles |
| CN1412391A (en) * | 2002-07-12 | 2003-04-23 | 天津大学 | Large-sized concrete cylindrical structure whose wall end possesses excavating device and sinking method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1605684A (en) | 2005-04-13 |
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Effective date of registration: 20090213 Address after: Room 504, sunshine court, liming garden, No. 388 West Second Ring Road, Fujian, Fuzhou Patentee after: Li Xiaoyun Address before: Room 504, sunshine court, liming garden, No. 388 West Second Ring Road, Fujian, Fuzhou Patentee before: Li Yujin |
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| ASS | Succession or assignment of patent right |
Owner name: LI XIAOYUN Free format text: FORMER OWNER: LI YUJIN Effective date: 20090213 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070124 Termination date: 20111109 |