CN107447754A - The new plant stake technique of prefabricated tubular pile and the pile body formed - Google Patents
The new plant stake technique of prefabricated tubular pile and the pile body formed Download PDFInfo
- Publication number
- CN107447754A CN107447754A CN201710734394.7A CN201710734394A CN107447754A CN 107447754 A CN107447754 A CN 107447754A CN 201710734394 A CN201710734394 A CN 201710734394A CN 107447754 A CN107447754 A CN 107447754A
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- China
- Prior art keywords
- pile
- prefabricated tubular
- tubular pile
- soil
- prefabricated
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/50—Piles comprising both precast concrete portions and concrete portions cast in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses the new plant stake technique and pile body of a kind of prefabricated tubular pile, the step of planting stake work, is：By deep-layer stirring machinery in the range of prefabricated pile buries on the spot by undisturbed soil action of forced stirring, the prefabricated tubular pile of pre-buried slip casting passage is implanted into underground, suitable curing agent is injected by slip casting passage and outer-penetrating agent to specified stratum forms fixed soil to form the pile body being suitably applied in soft layer；The new plant stake technique of the prefabricated tubular pile is used for the implantation of prefabricated pile, injects curing agent in the soft layers such as muck soil, silty clay and saturability soil and outer-penetrating agent make it that consolidation effect is notable, can be come into operation quickly after processing, speed of application lifting；Pile side resistance and end resistance increase, pile body vertical bearing capacity are effectively lifted；Hammer piling is decreased or even eliminated in construction, reduces and pile body is destroyed；The pollution to environment is reduced, is reduced investment outlay.
Description
Technical field
The present invention relates to foundation treatment technology field, the new plant stake technique of more particularly to a kind of prefabricated tubular pile and formed
Pile body.
Background technology
Undisturbed soil also known as not disturbed soil, although its compared with disturbed soil without the change of physics and chemical composition,
Maintain natural structure and natural moisture content；Therefore, for undisturbed soil in the case where not disturbing for a long time, its soil structures is relative
It is stable, if piling, the soil body frictional force that pile body is subject to are relatively large.
Slurry injection technique is a kind of slurries to be sent into crack, fault belt or the building of structure foundation connecing in itself
Construction technology in seam, crack.The impermeability and globality for being filled stratum or building can be improved by slip casting, improves ground
Condition, ensure hydraulic structure safe operation.
Because pile body mainly undertakes vertical load in actual condition, it is therefore desirable to ensure that its satisfaction in soil layer is certain
The requirement of vertical bearing capacity.But for such as soft layer of the type such as muck soil, silty clay and saturability soil,
Then need to be necessary to be improved pile body structure and construction technology, the ground extruding to inter-pile soil realized during stake is planted,
Give full play to and the potential bearing capacity using foundation soil, the problem of to efficiently solve load-carrying capacity of soft soil foundation deficiency.
The content of the invention
It is an object of the invention to provide one kind to be applied to soft layer, effectively lifts pile body vertical bearing capacity, while can
Reduce the new plant stake technique of the prefabricated tubular pile destroyed to pile body.
It is a further object of the present invention to provide the pile body that a kind of new plant stake technique using above-mentioned prefabricated tubular pile is formed.
Therefore, technical solution of the present invention is as follows：
A kind of new plant stake technique of prefabricated tubular pile, step are as follows：
S1, by prefabricated tubular pile bury in the range of undisturbed soil disturbed soil is formed by action of forced stirring, action of forced stirring is a diameter of
1.1~1.2 times of prefabricated tubular pile diameter；
S2, pre-buried a plurality of slip casting passage and it is opened in multiple in prefabricated tubular pile side wall in the prefabrication process of prefabricated tubular pile
Correspond respectively with every slip casting passage and the grout outlet of insertion, make prefabricated tubular pile bury in the range of each layer of soft layer
The interior at least one grout outlet of correspondence, prefabricated tubular pile stake end are provided with a grout outlet；
S3, by prefabricated tubular pile conduct oneself with dignity sink, static pressure sink or low order number vibration-sunk by way of be implanted into underground；
S4, by slip casting passage to purpose soil layer inject by 7%~15wt.% curing agent, 1%~10wt.% it is outer
Slurries, the solidification of agent and the water configuration of surplus are mixed, after making cured dose of prefabricated tubular pile vicinity soil layer and outer-penetrating agent mixing cured
Form the compacted soil that unconfined compressive strength is 0.3~2MPa.
It is preferred that in step s 2, slip casting passage is the disposable Grouting Pipe being embedded in prefabricated tubular pile, its internal diameter is 8mm；
External diameter is 12mm；Id tolerance is ± 0.3mm.The disposable Grouting Pipe can be directly bought from commercially available prod.
In step S4, cement can be selected in curing agent；Outer-penetrating agent then selects a kind of corresponding addition according to soil concrete condition
Agent or the mixture of multiple additives, such as early strength agent, retarder, water reducer；Then it is the outer of 1%~10wt.% by total amount
Mix agent, 7%~15wt.% cement and surplus water it is well mixed after form slurries slip casting.
In addition, during step S4 slip casting, when soft layer is decomposed rock, unsaturated clay or silt, note
Slurry pressure is 3~10Mpa；When soft layer is saturation soil layer, grouting pressure is 1.2~4Mpa；The slip casting stream of slip casting process
Measure as 20~75L/min.
The art of this patent scheme also includes the pile body formed using the new plant stake technique of above-mentioned prefabricated tubular pile.
The new plant stake technique of the prefabricated tubular pile is used for the implantation of prefabricated pile, in muck soil, silty clay and saturability
Curing agent is injected in the soft layers such as soil and outer-penetrating agent make it that consolidation effect is notable, can be come into operation quickly after processing, is constructed
Speed is lifted；Pile side resistance and end resistance increase, pile body vertical bearing capacity are effectively lifted；Hammer is decreased or even eliminated in construction
Stake is sunk, reduces and pile body is destroyed, reduce the pollution to environment, comprising noise pollution and water pollution, reduce investment outlay.
Brief description of the drawings
Fig. 1 is the structural representation of pile tube alleged by the new plant stake technique of the prefabricated tubular pile of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described further, but following embodiments are absolutely not to this hair
It is bright to have any restrictions.
The pile body prepared as shown in Figure 1 for a kind of new plant stake technique using prefabricated tubular pile.The pile body include value stake in
Prefabricated tubular pile 3 in soft layer is formed at three with an end and prefabricated tubular pile 3 is formed in soft layer opening position located underground
The fixed soil body 5, to increase the resistance at stake end and stake side, further enhances the vertical bearing capacity of pile body.
The new plant stake technique of the prefabricated tubular pile comprises the following steps that：
S1, by prefabricated tubular pile 3 bury in the range of undisturbed soil by deep-layer stirring machinery action of forced stirring be chesson, i.e.,
Form disturbed soil；Wherein, the diameter of a diameter of prefabricated tubular pile 3 of the disturbed soil of the formation after action of forced stirring is carried out to undisturbed soil
1.1~1.2 times；
In step sl, by, on the spot by weak soil action of forced stirring, making undisturbed soil disturbance turn into plasticity stronger in earth formation deep
Disturbed soil, to reduce the construction of the soil body frictional force, i.e. lifting step S2 pile driving process that need to overcome in stake sinking watching
Efficiency；
S2, due in the range of being buried in prefabricated tubular pile 3 altogether comprising two layer depths be about 2000mm soft layer 2, because
This, accordingly, three disposable Grouting Pipes are embedded in three slip castings of formation in pile tube in its prefabrication process and led to by prefabricated tubular pile 3
Road 4, while three offered in the side wall of prefabricated tubular pile 3 are corresponded respectively with every slip casting passage 4 and what is penetrated goes out
Mouth is starched, for after pile sinking, slip casting to be carried out to purpose stratum by slip casting passage 4；
Specifically, open up in three grout outlets in the side wall of prefabricated tubular pile 3, a grout outlet is opened in Adjacent Pile end
In the pile tube side wall of (i.e. the bottom of prefabricated tubular pile 3), position that two other grout outlet opens up corresponds to prefabricated tubular pile 3 and buried respectively
In the range of two soft layers 2 at and at the intermediate depth of each soft layer 2, will for subsequently in step s 4
Slip casting is injected separately into pile-end soil layer and two soft layers 2；Wherein, the disposable Grouting Pipe being embedded in prefabricated tubular pile 3
Internal diameter be 8mm, external diameter 12mm, id tolerance is ± 0.3mm.
S3, by prefabricated tubular pile 3 using deadweight sink, static pressure sink or low order number vibration-sunk by the way of be implanted into underground；Tool
Body, due to carrying out mechanical agitation to the undisturbed soil at pile sinking in step sl, disturbed soil is formed it into, therefore in piling construction
In can by directly using deadweight sink or static pressure sink in a manner of, can also be used according to the actual soil layer situation of soft layer 2
The mode that low order number vibration (i.e. the number of hammer piling is no more than 5 times) is sunk, realizes and hammering is decreased or even eliminated in construction
Pile sinking, with reduce destruction to pile body and it is corresponding caused by environment pollution, such as noise pollution and water pollution；
S4, by slip casting passage 4 to purpose soil layer inject by 15wt.% cement, 8wt.% early strength water-reducing agents and surplus
Water forms and is well mixed the slurry formed, is allowed to penetrate into purpose stratum and tool is formed with stratum soil and after 90 days cure cycles
There is the compacted soil 5 of certain unconfined compressive strength；Wherein, because two soft layers 2 in the stratum are unsaturation stickiness
Soil, therefore grouting pressure is set as 10Mpa, flow rate of grouting 70L/min.
After tested, take the identical soil body and the slurry of identical proportioning with sub-surface identical experimental situation, the soil body and
Slurry is by blending and unconfined compressive strength after fixed line 90 days is 0.3~2MPa；By theoretical calculation, it is correspondingly formed in stake
Fixed soil 5 at end and stake side, makes pile side resistance and end resistance effectively increase, relative to individually prefabricated tubular pile 3 is sunk
The vertical bearing capacity of the post-job pile body of stake, the vertical bearing capacity for the pile body that the new plant stake technique is formed at least increase 20%.
It is above-mentioned that one pile body prepared using the new plant stake technique of disclosure prefabricated tubular pile is carried out with reference to embodiment
Detailed description, be illustrative rather than limited, can include several embodiments according to limited scope, thus
Changing and modifications under present general inventive concept is not departed from, should be belonged within protection scope of the present invention.
Claims (4)
1. the new plant stake technique of a kind of prefabricated tubular pile, it is characterised in that step is as follows：
S1, by prefabricated tubular pile bury in the range of undisturbed soil disturbed soil is formed by action of forced stirring, action of forced stirring is a diameter of prefabricated
1.1~1.2 times of pile tube diameter；
S2, pre-buried a plurality of slip casting passage and the multiple difference being opened in prefabricated tubular pile side wall in the prefabrication process of prefabricated tubular pile
Corresponded with every slip casting passage and the grout outlet of insertion, make prefabricated tubular pile bury in the range of each layer of soft layer in it is right
At least one grout outlet is answered, prefabricated tubular pile stake end is provided with a grout outlet；
S3, by prefabricated tubular pile conduct oneself with dignity sink, static pressure sink or low order number vibration-sunk by way of be implanted into underground；
S4, injected to purpose soil layer by the outer-penetrating agent of 7%~15wt.% curing agent, 1%~10wt.% by slip casting passage
Slurries, solidification with the water configuration of surplus, make to be formed after cured dose of prefabricated tubular pile vicinity soil layer and outer-penetrating agent are mixing cured
Unconfined compressive strength is 0.3~2MPa compacted soil.
2. the new plant stake technique of prefabricated tubular pile according to claim 1, it is characterised in that the slip casting passage in step S2
To be embedded in the disposable Grouting Pipe in prefabricated tubular pile, its internal diameter is 8mm；External diameter is 12mm；Id tolerance is ± 0.3mm.
3. the new plant stake technique of prefabricated tubular pile according to claim 1, it is characterised in that in step S4 slip casting process
In, when soft layer is decomposed rock, unsaturated clay or silt, grouting pressure is 3~10Mpa；When soft layer is saturation
Soil layer, grouting pressure are 1.2~4Mpa；The flow rate of grouting of slip casting process is 20~75L/min.
A kind of 4. pile body formed according to the new plant stake technique of prefabricated tubular pile according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734394.7A CN107447754A (en) | 2017-08-24 | 2017-08-24 | The new plant stake technique of prefabricated tubular pile and the pile body formed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734394.7A CN107447754A (en) | 2017-08-24 | 2017-08-24 | The new plant stake technique of prefabricated tubular pile and the pile body formed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107447754A true CN107447754A (en) | 2017-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710734394.7A Pending CN107447754A (en) | 2017-08-24 | 2017-08-24 | The new plant stake technique of prefabricated tubular pile and the pile body formed |
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| Country | Link |
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| CN (1) | CN107447754A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467322A (en) * | 2021-05-28 | 2022-12-13 | 上海同人里岩土工程技术有限公司 | Precast pile grouting after stirring and implanting into pile end and construction method thereof |
| CN116397687A (en) * | 2023-05-26 | 2023-07-07 | 上海勘测设计研究院有限公司 | Composite pile foundation |
| WO2024113201A1 (en) * | 2022-11-28 | 2024-06-06 | 中交建筑集团有限公司 | Prestressed pile and reinforcing construction method for prestressed pile used for deep muddy-soil foundation pit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1598167A (en) * | 2004-08-30 | 2005-03-23 | 江苏东达工程机械股份有限公司 | Original soil strengthen pile sinking method and its construction apparatus |
| CN2714628Y (en) * | 2004-07-28 | 2005-08-03 | 河海大学岩土工程科学研究所 | Grouting device for improving bearing capacity of cast-in-situ concrete thin wall pipe pile |
| CN1837501A (en) * | 2005-03-24 | 2006-09-27 | 曹兴明 | Grouted screw pile ,construction method therefor and grouting arrangement employing same |
| CN101748728A (en) * | 2008-10-10 | 2010-06-23 | 上海强劲基础工程有限公司 | Soil cement expanding uplift pile |
| CN201649075U (en) * | 2010-01-26 | 2010-11-24 | 中国建筑第四工程局有限公司 | Deep well cast-in-place pile of reverse construction board wall of expanded head |
| CN102505684A (en) * | 2011-11-02 | 2012-06-20 | 河海大学 | Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof |
| CN202543906U (en) * | 2012-03-27 | 2012-11-21 | 浙江大学城市学院 | Precast pile with reserved grouting pipes |
-
2017
- 2017-08-24 CN CN201710734394.7A patent/CN107447754A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2714628Y (en) * | 2004-07-28 | 2005-08-03 | 河海大学岩土工程科学研究所 | Grouting device for improving bearing capacity of cast-in-situ concrete thin wall pipe pile |
| CN1598167A (en) * | 2004-08-30 | 2005-03-23 | 江苏东达工程机械股份有限公司 | Original soil strengthen pile sinking method and its construction apparatus |
| CN1837501A (en) * | 2005-03-24 | 2006-09-27 | 曹兴明 | Grouted screw pile ,construction method therefor and grouting arrangement employing same |
| CN101748728A (en) * | 2008-10-10 | 2010-06-23 | 上海强劲基础工程有限公司 | Soil cement expanding uplift pile |
| CN201649075U (en) * | 2010-01-26 | 2010-11-24 | 中国建筑第四工程局有限公司 | Deep well cast-in-place pile of reverse construction board wall of expanded head |
| CN102505684A (en) * | 2011-11-02 | 2012-06-20 | 河海大学 | Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof |
| CN202543906U (en) * | 2012-03-27 | 2012-11-21 | 浙江大学城市学院 | Precast pile with reserved grouting pipes |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467322A (en) * | 2021-05-28 | 2022-12-13 | 上海同人里岩土工程技术有限公司 | Precast pile grouting after stirring and implanting into pile end and construction method thereof |
| WO2024113201A1 (en) * | 2022-11-28 | 2024-06-06 | 中交建筑集团有限公司 | Prestressed pile and reinforcing construction method for prestressed pile used for deep muddy-soil foundation pit |
| CN116397687A (en) * | 2023-05-26 | 2023-07-07 | 上海勘测设计研究院有限公司 | Composite pile foundation |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20171208 |