CN105672329B - The large size prefabricated building enclosure of deep basal pit and construction method - Google Patents
The large size prefabricated building enclosure of deep basal pit and construction method Download PDFInfo
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- CN105672329B CN105672329B CN201610112270.0A CN201610112270A CN105672329B CN 105672329 B CN105672329 B CN 105672329B CN 201610112270 A CN201610112270 A CN 201610112270A CN 105672329 B CN105672329 B CN 105672329B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a kind of large size prefabricated building enclosure of deep basal pit and construction method, the large size prefabricated building enclosure of deep basal pit, the rotary churning pile or mixing pile being engaged including composite pile and between adjacent composite pile and with composite pile, composite pile includes a prefabricated pile, and the soil cement of prefabricated pile outer ring is filled in, soil cement is monolithically fabricated a cylindrical composite pile structure with prefabricated pile.Building enclosure has earth-retaining and sealing double action；Earth-retaining acts through a kind of composite pile and realized, composite pile pore-forming is circle, and hole is implanted into prefabricated pile, space backfilling cement soil；Sealing effect is engaged realization by rotary churning pile between soil cement and composite pile or mixing pile.Prefabricated pile in pile foundation engineering is incorporated into the building enclosure in deep-foundation pit engineering by the invention, and change Squeezing Soil Pile expands prefabricated pile stratum applicability into low Squeezing Soil Pile；Stake processed and pile quality are ensure that, prefabricated pile can smoothly reach projected depth, avoid cutting stake；Fender post and sealing are combined.
Description
Technical field
The present invention relates to construction engineering technical field, and prefabricated industrialization management is promoted in deep pit support more particularly to one kind
The building enclosure and construction method of protector for collar domain development.
Background technology
Deep foundation pit of construction engineering building enclosure typically uses cast-in-situ bored pile, outside injection rotary churning pile or mixing pile sealing.
As deep-foundation pit engineering gradually develops to depth, general orientation, building enclosure is inevitable to be developed to large scale, due to construction technology itself and
Size and depth increase, and cause that building enclosure construction quality is poor, speed of application is slow.
Prefabricated pile is commonly used in building pile foundation engineering, existing process for sinking be mainly static pressure and by force hammer two kinds,
Both techniques belong to Squeezing Soil Pile, should not be used in downtown area intensive building, close on road and underground utilities intersect various area,
Exclusion amount during because of piling to the soil body is big, so as to produce earth horizontal displacement and vertical displacement (protuberance), when particularly driving piles such as
Meet hard folder soil layer or round gravel layer, pile top be difficult to enter designed elevation, cause the serious damage of stake, the delay engineering time cause through
Loss in Ji, and have a strong impact on the safety of Adjacent Buildings, road, structures.
It is to cut stake to solve this one of problem, traditional method, i.e., cuts out the top of stake when stake is not gone down,
The defects of this method is present is both to waste raw material, destroys the original result and prestressing force of stake again, has a strong impact on pile foundation
Intensity, it is difficult to make the quality of building be protected；Second, first carrying out drawing hole before pile sinking, the defects of this method is present be
Level of ground water area, especially sand-pebble layer higher, easy collapse hole, it is difficult to ensure that hole quality.
The content of the invention
In place of problem and shortage present in background technology, the present invention is intended to provide a kind of deep basal pit is large size prefabricated
Building enclosure and construction method.
The technical solution adopted by the present invention is as follows：
A kind of large size prefabricated building enclosure of deep basal pit, including composite pile and between adjacent composite pile and and composite pile
The rotary churning pile or mixing pile being engaged, described composite pile includes a prefabricated pile, and is filled in prefabricated pile outer ring
Soil cement, described soil cement are monolithically fabricated a cylindrical composite pile structure with prefabricated pile.
Further, described rotary churning pile is by high pressure spray jetting, soil, slurries, cutting soil, forms cement earth pile；
While described mixing pile is by drilling tool cutting soil, slurries are injected, stir the soil body and slurries, the cement earth pile of formation；
Further, described soil cement is engaged with rotary churning pile between composite pile or mixing pile ensures sealing.
Further, the all-hydraulic drill is a kind of full-hydraulic multifunctional stake machine, is equipped with hollow type long screw drill rod；It is suitable
With various soil, layer of sand, cobble stratum；Drilling diameterDepth is up to more than 30 meters.
Further, the soil cement is to stir configuration in advance in earth's surface, is conveyed by backstage squeezing unit；
Further, described cement grout material includes cement, good soil, additive and the additive of selection.
Further, the slurries fluidity is maintained between 160mm~240mm；
Further, the grout cures time is maintained between 2h~4h；
Further, unconfined compressive strength is not less than 1MPa after the grout cures；
Further, seepage-resistant grade is not less than P6 after the grout cures；
Further, the cement can use Portland cement, portland slag cement or pulverized fuel ash cement, its
Middle cement mixing content is 18%~25%；
Further, silt, cohesive soil or the sand that described good soil is discharged using site operation；
Further, described additive uses aggregate chips or flyash；
Further, additive uses accelerator.
Further, rotary churning pile or mixing pile are engaged size with composite pile and determined by design between prefabricated pile, rotary churning pile or stir
Pile center is mixed compared with compound pile center, on the outside of deviation foundation ditch, is ensured in the case where outer lateral earth pressure acts on, occlusal surface is pressurized, sealing
Effect is good.
Further, the cross section of described prefabricated pile is rectangle, I-shaped, circular or trapezoidal.
Further, the axis for the outer ring that the axis of described prefabricated pile is formed with soil cement overlaps.
A kind of construction method of the large size prefabricated building enclosure of deep basal pit, comprises the steps：
A. all-hydraulic drill is in place：Peg positions, and all-hydraulic drill centering is in place；
B. drilling and forming hole：Start all-hydraulic drill, auger stem is drilled down into projected depth along leading truck；
C. the pressure of the drill slurry is carried：Open mudjack, side lifting auger stem, side press-in cement grout；Cement grout is full of
Room for promotion, it is ensured that hole wall is stable.
D. all-hydraulic drill shifts：Carry out next prefabricated pile pore-forming operation；
E. pile extension platform is in place：Pile extension platform is connected with pedrail crane, and mobile pedrail crane makes pile extension platform centering in place；
F. pile follower：Pedrail crane hangs first segment prefabricated pile, and pile extension platform is higher by the top of prefabricated pile, reserves pile extension work
Face, pass through pile extension platform fixture locking first segment prefabricated pile；
G. pile extension, put stake：Above section prefabricated pile to the first segment prefabricated pile of pedrail crane lifting second, by mechanically connecting two
Prefabricated pile is saved, then opens pile extension platform fixture, transfers prefabricated pile；
H. Pile feeder and vibration hammer are connected；When prefabricated pile can not sink by gravity, pile extension platform fixture locking prefabricated pile,
Pile feeder and vibration hammer are sequentially connected at the top of prefabricated pile；
I. piling is vibrated：Vibration on Start-up hydraulic means, prefabricated pile is depressed into projected depth；
J. stake operation under next prefabricated pile is carried out；
K. rotary churning pile or mixing pile between injection stake.
Described construction, the mud jacking speed determine according to field test, ensure to starch during lifting auger stem
Liquid has full of borehole space after drilling rod lifting and prevents blending anti-collapse hole effect.
Described construction, described mud jacking amount determine according to field engineering geological condition and underground water buried depth situation,
After considering prefabricated pile insertion, slurries extrude space with soil at both sides upward, determine that slurries fill ratio in the borehole.
Described construction, the prefabricated stake cross sectional shape first choice rectangle, specific size according to excavation of foundation pit depth and
Service stage load, which calculates, to be determined, sectional dimension can be 500 × 500mm~1200 × 1200mm, can also be I-shaped, circle
Shape, trapezoidal etc..
The prefabricated pile length is 10m~40m, is at most divided into 3 sections, often saves length and is not preferably greater than 15m.
Further, described rotary churning pile is by high pressure spray jetting, soil, slurries, cutting soil, forms cement earth pile；
While described mixing pile is by drilling tool cutting soil, slurries are injected, stir the soil body and slurries, the cement earth pile of formation；
Beneficial effects of the present invention are as follows：
1st, pile-forming speed is fast, and pile quality is reliable, and efficiency high, noise is low, no mud circulation, is not limited by underground water.
2nd, the characteristics of not being suitable for the stratum such as sandy gravel, drift sand existing for traditional pile sinking mode is overcome, it is shown that greatly
Superiority.
3rd, slurries configure in advance, form cement grout uniformity height, and parameters index controllability is strong.
4th, the pile foundation of civil construction project is can be widely applied to, applies also for fender post, the sealing curtain of deep-foundation pit engineering
Curtain etc..
5th, be advantageous to promote the prefabricated industrialized development of Urban Underground Space Excavation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the large size prefabricated building enclosure horizontal layout schematic diagram of deep basal pit；
Fig. 2 is the large size prefabricated composite pile construction vertical section schematic diagram of deep basal pit.
In figure：1 soil cement, 2 prefabricated piles, 3 rotary churning piles or mixing pile.
Embodiment
Below in conjunction with the accompanying drawings the present invention is continued to describe in detail：
In place of the present invention is for problem and shortage present in background technology, the present invention is intended to provide a kind of big chi of deep basal pit
Very little prefabricated building enclosure and construction method.Building enclosure has earth-retaining and sealing double action；Earth-retaining acts through a kind of composite pile
Realize, composite pile pore-forming is circle, and hole is implanted into prefabricated pile, space backfilling cement soil；Sealing effect by soil cement with it is compound
Rotary churning pile or mixing pile occlusion are realized between stake.Prefabricated pile in pile foundation engineering is incorporated into going along with sb. to guard him in deep-foundation pit engineering by the invention
In structure, change Squeezing Soil Pile expands prefabricated pile stratum applicability into low Squeezing Soil Pile；It ensure that stake processed and pile quality, prefabricated pile
Projected depth can be smoothly reached, avoids cutting stake；Fender post and sealing are combined.The present invention is carried out specifically below in conjunction with the accompanying drawings
It is bright：
As shown in figure 1, the large size prefabricated building enclosure of deep basal pit, including composite pile and between adjacent composite pile and with
The rotary churning pile or mixing pile 3 that composite pile is engaged, described composite pile includes a prefabricated pile 2, and is filled in prefabricated
The soil cement 1 of stake outer ring, soil cement 1 are monolithically fabricated a cylindrical composite pile structure with prefabricated pile 2.
Further, soil cement 1 is engaged with rotary churning pile between composite pile or mixing pile ensures sealing.
Further, the all-hydraulic drill is a kind of full-hydraulic multifunctional stake machine, is equipped with hollow type long screw drill rod；It is suitable
With various soil, layer of sand, cobble stratum；Drilling diameterDepth is up to more than 30 meters.
Further, soil cement 1 is to stir configuration in advance in earth's surface, is conveyed by backstage squeezing unit；
Further, the slurry material of soil cement 1 includes cement, good soil, additive and the additive of selection, the slurries
Fluidity is maintained between 160mm~240mm；The grout cures time is maintained between 2h~4h；Resist after grout cures without lateral spacing
Compressive Strength is not less than 1MPa；Seepage-resistant grade is not less than P6 after grout cures；
For those skilled in the art according to four above-mentioned parameters, the experiment by routine can obtain cement grout material
The ratio range of each component of material, therefore, herein without detailed proportioning explanation.
Further, cement can use Portland cement, portland slag cement or pulverized fuel ash cement, and cement is mixed
Measure as 18%~25%；
Further, silt, cohesive soil or the sand that good soil is discharged using site operation；
Further, additive uses aggregate chips or flyash；
Further, additive uses accelerator.
Further, rotary churning pile or mixing pile are engaged size with composite pile and determined by design between prefabricated pile, rotary churning pile or stir
Pile center is mixed compared with compound pile center, on the outside of deviation foundation ditch, is ensured in the case where outer lateral earth pressure acts on, occlusal surface is pressurized, sealing
Effect is good.
Further, the cross section of described prefabricated pile is rectangle, I-shaped, circular or trapezoidal.
Further, the axis for the outer ring that the axis of described prefabricated pile is formed with soil cement overlaps.
As shown in Fig. 2 a kind of construction of the large size prefabricated building enclosure of deep basal pit, comprises the steps：
A. all-hydraulic drill is in place：Peg positions, and all-hydraulic drill centering is in place；
B. drilling and forming hole：Start all-hydraulic drill, auger stem is drilled down into projected depth along leading truck；
C. the pressure of the drill slurry is carried：Open mudjack, side lifting auger stem, side press-in soil cement；
D. all-hydraulic drill shifts：Carry out next prefabricated pile pore-forming operation；
E. pile extension platform is in place：Pile extension platform is connected with pedrail crane, and mobile pedrail crane makes pile extension platform centering in place；
F. pile follower：Pedrail crane hangs first segment prefabricated pile, and pile extension platform is higher by the top of prefabricated pile, reserves pile extension work
Face, pass through pile extension platform fixture locking prefabricated pile；
G. pile extension, put stake：Above section prefabricated pile to the first segment prefabricated pile of pedrail crane lifting second, opened after mechanical pile extension
Pile extension platform locking cylinder, prefabricated pile sink by gravity；
H. Pile feeder and vibration hammer are connected；When prefabricated pile can not sink by gravity, pile extension platform fixture locking prefabricated pile,
Pile feeder and vibration hammer are sequentially connected at the top of prefabricated pile；
I. piling is vibrated：Vibration on Start-up hydraulic means, prefabricated pile is depressed into projected depth；
J. stake operation under next prefabricated pile is carried out；
K. injection rotary churning pile or mixing pile.
Described construction, the mud jacking speed determine according to field test, ensure that slurries are full of brill in drilling process
Borehole space after bar lifting, have and prevent blending anti-collapse hole effect.
Described construction, described mud jacking amount determine that after considering prefabricated pile insertion, slurries are upward according to field test
Side and soil at both sides extruding space, determine that slurries fill ratio in the borehole.
Described construction, the prefabricated stake cross sectional shape first choice is square, and sectional dimension is 500 × 500mm~1200
× 1200mm, can also be I-shaped, circular, trapezoidal etc..
The prefabricated pile length is 10m~40m, is at most divided into 3 sections, often saves length and is not more than 15m.
The characteristics of instant invention overcomes the stratum such as sandy gravel, drift sand are not suitable for existing for traditional pile sinking mode, it is shown that
Great superiority.Pile-forming speed is fast, and pile quality is reliable, and efficiency high, noise is low, no mud circulation, is not limited by underground water.
Slurries configure in advance, and it is strong to form the high parameters index controllability of soil cement uniformity.It can be widely applied to civil construction work
The pile foundation of journey, apply also for fender post, water-stop curtain of deep-foundation pit engineering etc..Be advantageous to promote Urban Underground Space Excavation
Prefabricated industrialized development.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. the construction method of the large size prefabricated building enclosure of deep basal pit, it is characterised in that：Comprise the following steps：
A. all-hydraulic drill is in place：Peg positions, and all-hydraulic drill centering is in place；
B. drilling and forming hole：Start all-hydraulic drill, auger stem is drilled down into projected depth along leading truck；
C. the pressure of the drill slurry is carried：Open mudjack, side lifting auger stem, side press-in cement grout；Cement grout is full of lifting
Space, ensure that hole wall is stable；
D. all-hydraulic drill shifts：Carry out next prefabricated pile pore-forming operation；
E. pile extension platform is in place：Pile extension platform is connected with pedrail crane, and mobile pedrail crane makes pile extension platform centering in place；
F. pile follower：Pedrail crane hangs first segment prefabricated pile, and pile extension platform is higher by the top of prefabricated pile, reserves pile extension working face, leads to
Cross pile extension platform fixture locking first segment prefabricated pile；
G. pile extension, put stake：It is pre- by mechanically connecting two sections above section prefabricated pile to the first segment prefabricated pile of pedrail crane lifting second
Stake processed, pile extension platform fixture is then opened, transfer prefabricated pile；
H. Pile feeder and vibration hammer are connected；When prefabricated pile can not sink by gravity, pile extension platform fixture locking prefabricated pile is prefabricated
Stake top portion is sequentially connected Pile feeder and vibration hammer；
I. piling is vibrated：Vibration on Start-up hydraulic means, prefabricated pile is depressed into projected depth；
J. stake operation under next prefabricated pile is carried out；
K. rotary churning pile or mixing pile between injection composite pile.
2. construction method as claimed in claim 1, it is characterised in that described prefabricated building enclosure includes：Composite pile and position
The rotary churning pile or mixing pile being engaged between adjacent composite pile and with composite pile, described composite pile are prefabricated including one
Stake, and is filled in the soil cement of prefabricated pile outer ring, described soil cement and prefabricated pile be monolithically fabricated one it is cylindrical compound
Pilework.
3. construction method as claimed in claim 2, it is characterised in that：Described rotary churning pile or mixing pile axis and composite pile axle
Line is compared, on the outside of rotary churning pile or mixing pile axis deviation foundation ditch.
4. construction method as claimed in claim 2, it is characterised in that：The water of described rotary churning pile or mixing pile and composite pile
Soil part carries out occlusion and realizes sealing.
5. construction method as claimed in claim 2, it is characterised in that：The cross section of described prefabricated pile be rectangle, it is I-shaped,
It is circular or trapezoidal.
6. construction method as claimed in claim 2, it is characterised in that：The axis of described prefabricated pile forms outer with soil cement
The axis of circle overlaps.
7. construction method as claimed in claim 2, it is characterised in that：The soil cement is to stir configuration in advance in earth's surface, is led to
Later platform squeezing unit conveys；Cement grout material includes cement, good soil, additive and the additive of selection；Wherein, slurries
Fluidity is maintained between 160mm ~ 240mm；The grout cures time is maintained between 2h ~ 4h；Without lateral spacing resistance to compression after grout cures
Intensity is not less than 1MPa；Seepage-resistant grade is not less than P6 after grout cures.
8. construction method as claimed in claim 1, it is characterised in that the determination mode of the mud jacking speed is to ensure to carry brill
During slurries full of drilling rod lifting after borehole space be defined.
9. construction method as claimed in claim 1, it is characterised in that described mud jacking amount determines according to field test, considers
After prefabricated pile insertion, slurries extrude space with soil at both sides upward, determine that slurries fill ratio in the borehole.
10. construction method as claimed in claim 1, it is characterised in that the prefabricated pile length is 10m ~ 40m, is at most divided into 3
Section, often save length and be not more than 15m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112270.0A CN105672329B (en) | 2016-02-29 | 2016-02-29 | The large size prefabricated building enclosure of deep basal pit and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112270.0A CN105672329B (en) | 2016-02-29 | 2016-02-29 | The large size prefabricated building enclosure of deep basal pit and construction method |
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| CN105672329A CN105672329A (en) | 2016-06-15 |
| CN105672329B true CN105672329B (en) | 2017-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024557A (en) * | 2018-08-09 | 2018-12-18 | 中国兵器工业北方勘察设计研究院有限公司 | A kind of drill-pouring prefabricated pile and construction method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894418B (en) * | 2017-02-28 | 2019-08-13 | 济南轨道交通集团有限公司 | A kind of metalling plants the running pulp administering method of prefabricated pile |
| CN112323560B (en) * | 2020-11-19 | 2022-03-01 | 中电建路桥集团有限公司 | Roadbed construction settlement control system in complex soft foundation environment |
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| CN1262252A (en) * | 1999-02-02 | 2000-08-09 | 刘珍 | Hard-core cement-earth compound pile and construction method thereof |
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| CN104563100A (en) * | 2014-12-18 | 2015-04-29 | 上海建工二建集团有限公司 | Cement mixing pile later embedding press-grouting pile support structure and construction method |
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| CN1262252A (en) * | 1999-02-02 | 2000-08-09 | 刘珍 | Hard-core cement-earth compound pile and construction method thereof |
| CN101591914A (en) * | 2009-06-25 | 2009-12-02 | 江苏华东建设基础工程有限公司 | A kind of job practices of using the foundation pit supporting construction of castinplace pile and agitation pile interlock |
| CN101871214A (en) * | 2009-09-11 | 2010-10-27 | 朱奎 | Foundation pit support and construction method for cement mixing pile inserted with Y type precast pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109024557A (en) * | 2018-08-09 | 2018-12-18 | 中国兵器工业北方勘察设计研究院有限公司 | A kind of drill-pouring prefabricated pile and construction method |
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| Publication number | Publication date |
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| CN105672329A (en) | 2016-06-15 |
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