CN1274912C - Pile forming operation method for bi-directional stirring piles - Google Patents
Pile forming operation method for bi-directional stirring piles Download PDFInfo
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- CN1274912C CN1274912C CN 200410065862 CN200410065862A CN1274912C CN 1274912 C CN1274912 C CN 1274912C CN 200410065862 CN200410065862 CN 200410065862 CN 200410065862 A CN200410065862 A CN 200410065862A CN 1274912 C CN1274912 C CN 1274912C
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Abstract
The present invention relates to a pile forming operation method for bi-directional stirring piles, which is a foundation treatment method for treating soft foundations. The operation method has the steps: a: leveling a field; b: locating a bi-directional stirring pile machine, namely hanging the stirring machine to a given pile position and centering the stirring machine to the give pile position by a crane; c: carrying out the processes of stirring and sinking: starting the bi-directional stirring pile machine to drive a drill rod of the bi-directional stirring pile machine to cut soil downward along a guide frame, starting a mortar conveying pump to spray cement mortar to soil mass, and stirring soil cement by the simultaneous rotation of blades which rotate positively and negatively on the drill rod of the bi-directional stirring pile machine; d: stirring the soil cement by the continuous sinking of the drill rod of the bi-directional stirring pile machine till a designed depth; e: stirring with lifting and stirring the soil cement continuously by the blades which rotate positively and negatively on the drill rod of the bi-directional stirring pile machine; f: lifting the drill rod and stirring the soil cement until reaching 50cm above the earth surface or a designed height, and finishing the construction of the bi-directional stirring soil cement stirring pile (1), wherein the soil cement stirring pile (1) is arranged in a plum blossom shape or a square shape to ensure the pile forming quality and the quality of the pile body.
Description
Technical field
The present invention is a kind of method for processing foundation, is applicable to Soft Ground, belongs to technical field of civil engineering.
Background technology
Cement mixing method is succeeded in developing as far back as Sweden, and domestic 1977 have been undertaken by Metallurgical Research Institute, Department of Architecture and Water Planning And Design Institute Of Traffic Ministry is laboratory experiment and mechanical development work.In the reinforced soft soil ground engineering, succeedd first in 1980.After this in national reinforced soft soil ground engineering, promote and come, particularly the Soft Ground in highway construction.
Soft Ground in the highway construction is to guarantee the key of project link, and occupies larger proportion in the engineering total price.A large amount of engineering practices show that it is simple that the cement mixing method method has construction, fast, vibrates advantages such as little, can improve the stability of soft foundation effectively, reduce and the control settling amount.Cement mixing method has now developed into a kind of soft foundation processing method commonly used, mainly is applicable to reinforce the saturated soft clay ground.This method is to utilize cement materials such as (or lime) as curing compound, by special Mixing Machine, in the ground depths, on the spot weak soil and curing compound are forced to stir, by producing series of physical and chemical reaction between curing compound and weak soil, weak soil is hardened the cement mixing method that becomes to have globality, water stability and certain intensity.This cement mixing method is formed composite foundation with all soil of stake, thereby improves bearing capacity of foundation soil, reduces foundation settlement.
But also there are more following problems in cement mixing method in Soft Ground:
(1) cement mixing method ubiquity cement-soil stirring in Soft Ground is inhomogeneous, influences pile quality.
(2) cement mixing method ubiquity cement paste skewness in pile body in Soft Ground does not reach due requirement at 6m to the following cement paste incorporation of 7m especially.
(3) cement mixing method ubiquity in work progress is serious emits slurry phenomenon, a large amount of cement pastes ground of emerging, and influences cement paste incorporation in the pile body.
(4) conventional soil cement mixing pile construction method generally needs four to stir two sprays, and work efficiency is low.
Owing to the existence of last genus problem, influenced the quality of cement mixing method; Also restricted simultaneously the range of application of cement mixing method.
Summary of the invention
Technical problem: the present invention is primarily aimed at the problem that exists in the above-mentioned construction, and the construction technology of cement mixing method is improved, and has proposed a kind of one-tenth pile operation method of bidirectional stirring pile, makes the problems referred to above be resolved.
Technical scheme: the present invention is according to concentric twin shaft drilling rod, on interior drilling rod, be provided with and be rotated in the forward blade and mouth spray is set, the reverse rotation blade is installed on the drilling rod outside, by crushing in the outer bar blade reverse rotation process and the effect of two-way stirring concrete earth simultaneously of forward and reverse rotating vane, emit approach on the blocking-up cement paste, the assurance cement paste evenly distributes in pile body and stirs, and protects pile quality.
This invention mainly is that the unidirectional stirring construction method of existing cement mixing method is changed over two-way stirring construction method, forms the new construction of a cover, and the concrete operations step is as follows:
A: leveling place;
B: bidirectional stirring pile machine location: crane suspention mixer is to specifying stake position and centering;
C: stir: start bidirectional stirring pile machine, make the bidirectional stirring pile machine drilling rod along leading truck to incision soil, open and send stock pump, to soil body water spray mud, on the bidirectional stirring pile machine drilling rod respectively the blade of forward and reverse rotation rotate stirring concrete earth simultaneously;
D: the bidirectional stirring pile machine drilling rod continues to sink and stirring concrete earth, up to projected depth;
E: stir when promoting, the blade of forward and reverse rotation continues stirring concrete earth on the bidirectional stirring pile machine drilling rod;
F: promote, be stirred to the above 50cm of the face of land or design elevation, finish the construction of two-way stirring concrete earth agitation pile.
Cement mixing method adopts quincunx or square arrangement (quincunx is that any adjacent three piles constitute equilateral triangle).
Beneficial effect: this method easy construction, simple to operate, its advantage mainly contains:
(1) can guarantee that cement paste is evenly distributed in pile body;
(2) can guarantee the incorporation of cement paste in pile body, the slurry phenomenon can not occur emitting;
(3) can guarantee that the pile body cement-soil stirs, and guarantees pile quality and pile quality;
(4) owing to solved and emit the slurry problem in the work progress, the range of application of cement mixing method is enlarged;
(5) because forward and reverse blade rotates, cut, stirs the soil body simultaneously, four stir two to what have worker's method now and spray and change into two of this worker's method and stir a spray, work efficiency is enhanced about more than once.
Description of drawings
Fig. 1 is square piling plan.
Fig. 2 is quincunx piling plan.
Fig. 3 is the bidirectional stirring pile construction flow chart.
Wherein have: cement mixing method 1; Construction plant 2; Outer drilling rod 3; Be installed in the stirring vane 4 on the outer drilling rod; Stirring vane 5 in being installed on the drilling rod; Interior drilling rod 6; Bidirectional stirring pile pile body 7; Power set 8; Actuating unit 9.
The specific embodiment
The present invention is designed to the concentric drilling rod of twin shaft to the drilling rod of cement mixing method, installs on interior drilling rod and is rotated in the forward blade, and the reverse rotation blade is installed on the drilling rod outside.Utilize forward and reverse crushing of rotation simultaneously of two groups of blades, cement grout is controlled between two groups of blades of forward and reverse rotation, make cement grout can not go upward to ground along drilling rod, cement grout can not occur and run off, thereby can guarantee that incorporation and the cement paste of cement paste in pile body is evenly distributed in pile body; Because forward and reverse rotation of drilling rod drives two groups of forward and reverse rotations simultaneously of blade, makes that the stirring of cement-soil is more full and uniform.
The test site is positioned at a certain construction section.Site operation experiment is with 8 of wet shot stakes, wherein with 4 of the cement mixing methods of two-way Beater operator method construction, and 4 of the cement mixing methods of constructing with traditional worker's method.Be: stake is long 10 meters, mix gray scale 15% (mix cement in the soil, the weight of mixing cement be native weight 15%), stake footpath 500mm.
The construction of test pile:
(1) smooth place;
(2) square arrangement is adopted in test pile stake position;
(3) bidirectional stirring pile machine location: crane suspention mixer is to specifying stake position and centering;
(4) stir: open two-way dynamical system, start mixing pile machine, make the mixing pile machine drilling rod along leading truck to incision soil, open and send stock pump to continue to sink, up to 10 meters degree of depth to spray water mud, the positive and negative rotation stirring concrete earth of stirring vane, mixer of the soil body;
(5) promote stirring: close and send stock pump, the mixing pile machine drilling rod promotes, continues simultaneously stirring concrete earth, to the face of land, finishes the pile body construction.
Result through field trial and laboratory test research shows: (1) the slurry phenomenon do not occur emitting fully with the cement mixing method of two-way Beater operator method construction in work progress; And with the cement mixing method that traditional worker's method is constructed, the slurry phenomenon then appears emitting in work progress.(2) core boring sampling is observed: the stirring of starching incorporation and cement-soil with the cement mixing method integral cement of two-way Beater operator method construction is all very even; The stirring non-uniform phenomenon that the pile body integral cement is starched incorporation and cement-soil then appears in the cement mixing method with traditional worker's method construction, and particularly hypomere pile body cement paste incorporation is on the low side.(3) pile quality is observed in the excavation back: the cement mixing method pile quality with two-way Beater operator method construction is fine; And it is general with the cement mixing method pile quality of traditional worker's method construction, relatively poor at natural below ground 1.5m pile quality in the layer of sand of 3.0m scope especially.
Claims (2)
1, a kind of one-tenth pile operation method of bidirectional stirring pile is characterized in that method of operating is:
A: leveling place;
B: bidirectional stirring pile machine location: crane suspention mixer is to specifying stake position and centering;
C: stir: start bidirectional stirring pile machine, make the bidirectional stirring pile machine drilling rod along leading truck to incision soil, open and send stock pump, to soil body water spray mud, on the bidirectional stirring pile machine drilling rod respectively the blade of forward and reverse rotation rotate stirring concrete earth simultaneously;
D: the bidirectional stirring pile machine drilling rod continues to sink and stirring concrete earth, up to projected depth;
E: stir when promoting, the blade of forward and reverse rotation continues stirring concrete earth on the bidirectional stirring pile machine drilling rod;
F: promote, be stirred to the above 50cm of the face of land or design elevation, finish the construction of two-way stirring concrete earth agitation pile (1).
2, the one-tenth pile operation method of bidirectional stirring pile according to claim 1 is characterized in that cement mixing method (1) adopts quincunx or square arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410065862 CN1274912C (en) | 2004-12-23 | 2004-12-23 | Pile forming operation method for bi-directional stirring piles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410065862 CN1274912C (en) | 2004-12-23 | 2004-12-23 | Pile forming operation method for bi-directional stirring piles |
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| CN1632233A CN1632233A (en) | 2005-06-29 |
| CN1274912C true CN1274912C (en) | 2006-09-13 |
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| CN 200410065862 Active CN1274912C (en) | 2004-12-23 | 2004-12-23 | Pile forming operation method for bi-directional stirring piles |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366828C (en) * | 2005-12-22 | 2008-02-06 | 上海交通大学 | Method for construction of deep layer rotating spraying mixture pile with diffusion preventing plate |
| CN101245594B (en) * | 2008-03-13 | 2010-06-09 | 刘松玉 | Bidirectional stirring pile machine |
| CN101514549B (en) * | 2009-04-01 | 2011-05-11 | 东南大学 | Method using intermediate mixing piles for treating three-layer soft foundation |
| CN102561332B (en) * | 2012-02-09 | 2014-01-22 | 东南大学 | Continuous variable-diameter cement-soil mixed pile forming method |
| CN103774644B (en) * | 2014-01-13 | 2015-08-26 | 东南大学 | A kind of construction method of drainage cement mixing method |
| CN104088274A (en) * | 2014-04-29 | 2014-10-08 | 周兆弟 | Quincunx drilling pile and forming method |
| CN104032730A (en) * | 2014-04-29 | 2014-09-10 | 周兆弟 | Triangular plum-blossom-shaped shaped drilling pile and forming method thereof |
| CN105714774B (en) * | 2014-12-04 | 2018-07-03 | 宫能和 | Diameter changeable agitation machine and its bore forming method, drilling rod |
| CN104624629B (en) * | 2014-12-26 | 2017-02-22 | 东南大学 | Method for remedying organism contaminated field by using bidirectional stirring injection method |
| CN104624632B (en) * | 2015-01-26 | 2017-01-18 | 东南大学 | Remediation method for hexavalent chromium polluted soil and underground water |
| CN105951670B (en) * | 2016-04-26 | 2019-08-06 | 浙江水利水电学院 | A kind of raising sea wall mask foundation bearing capacity construction method |
| CN105926598B (en) * | 2016-04-26 | 2019-05-24 | 浙江水利水电学院 | A kind of construction method of two-way cement mixing pile |
| CN105926597B (en) * | 2016-04-26 | 2019-08-06 | 浙江水利水电学院 | A kind of cement mixing pile processing method suitable for land making project |
| CN105970922A (en) * | 2016-05-16 | 2016-09-28 | 浙江工业大学 | Method for treating soft coastal saline foundation by injecting industrial waste residues into bidirectional nail-shaped stirring pile |
| CN108951623A (en) * | 2018-07-25 | 2018-12-07 | 许校舟 | A kind of three axis high-pressure rotary-spray two-way stirring pile construction methods |
| CN113445933A (en) * | 2021-07-01 | 2021-09-28 | 山东省建筑科学研究院有限公司 | Combined pile drill rod, drilling tool and combined pile manufacturing method |
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Owner name: NANJING LUDING MIXING PILE SPECIAL TECHNOLOGY CO., Free format text: FORMER OWNER: DONGNAN UNIV. Effective date: 20090508 |
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Effective date of registration: 20090508 Address after: Baixia District of Nanjing province Ruijin village 322 Patentee after: Nanjing Luding Stirring Pile Special Technology Co., Ltd. Address before: No. four arch 2, Nanjing City, Jiangsu Province Patentee before: Southeast University |