CN105714832B - A kind of large size prefabricated building enclosure of deep basal pit and construction method - Google Patents
A kind of large size prefabricated building enclosure of deep basal pit and construction method Download PDFInfo
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- CN105714832B CN105714832B CN201610111348.7A CN201610111348A CN105714832B CN 105714832 B CN105714832 B CN 105714832B CN 201610111348 A CN201610111348 A CN 201610111348A CN 105714832 B CN105714832 B CN 105714832B
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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
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- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of large size prefabricated building enclosure of deep basal pit and construction method, the rotary churning pile or mixing pile being engaged including composite pile and between adjacent composite pile and with composite pile, described composite pile includes a prefabricated pile, and the soil cement of prefabricated pile outer ring is filled in, described 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；Sealing effect is engaged realization by composite pile soil cement with rotary churning pile between 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, it is to avoid cut stake；Fender post and sealing are combined.
Description
Technical field
It is more particularly to a kind of to promote prefabricated industrialization management in deep pit support the present invention relates to construction engineering technical field
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 necessarily develops to large scale, because size and depth add
Greatly, cause that building enclosure construction quality is poor, speed of application is slow.
Prefabricated pile is commonly used in building pile foundation engineering, and existing process for sinking is mainly static pressure and by force two kinds of hammering,
Both techniques belong to Squeezing Soil Pile, should not be used in downtown area intensive building, close on road and the various area of underground utilities intersection,
It is big to the exclusion amount of the soil body during because of piling, 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 is difficult to enter designed elevation, causes the serious damage of stake, delay the engineering time cause through
Loss in Ji, and have a strong impact on the safety of Adjacent Buildings, road, structures.
In order to solve this problem, one of traditional method is to cut stake, i.e., cut out the top of stake when stake is not gone down,
The defect that this method is present is both to waste raw material, and the original result and prestressing force of stake are destroyed again, pile foundation is had a strong impact on
Intensity, it is difficult to make the quality of building be protected；Two be first to carry out drawing hole before pile sinking, the defect that this method is present be
Level of ground water area, especially sand-pebble layer, easy collapse hole, it is difficult to ensure that hole quality higher.
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 include a prefabricated pile, and are filled in prefabricated pile outer ring
Soil cement, described soil cement is 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, to form cement earth pile；
While described mixing pile is by drilling tool cutting soil, slurries, the drilling tool stirring soil body and slurries, the soil cement of formation are injected
Stake.
Further, described soil cement is engaged guarantee sealing with rotary churning pile between composite pile or mixing pile.
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, rotary churning pile or mixing pile are engaged size with composite pile and determined by design between prefabricated pile, rotary churning pile or stir
An axis is mixed compared with composite pile axis, on the outside of deviation foundation ditch, it is ensured that under the effect of outer lateral earth pressure, 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 is overlapped.
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 is positioned, and all-hydraulic drill centering is in place；
B. drilling and forming hole：Start all-hydraulic drill, auger stem is drilled down into desired depth along leading truck, lifts spiral
Drilling rod, soil in desired depth is all taken out；
C. continue to creep into, whitewash：Auger stem is descended again to desired depth, high pressure spray jetting, slurries, gas in drilling,
High-pressure injection cutting soil so that the following aperture increases of desired depth；Rotated by auger stem, mixing water, slurries and cutting
The soil body, form soil cement, drilling lifts auger stem, into cement earth pile to projected depth；
D. all-hydraulic drill is shifted：Carry out next composite 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 and is higher by pile extension platform at the top of first segment prefabricated pile, prefabricated pile, reserves pile extension work
Face, fixed prefabricated pile；
G. pile extension, put stake：Pedrail crane is lifted by crane above second section prefabricated pile to first segment prefabricated pile, is opened after mechanical pile extension
Pile extension platform locking cylinder, prefabricated pile sinks by gravity；
H. Pile feeder and vibration hammer are connected；When prefabricated pile can not sink by gravity, pile extension platform oil cylinder locking connects successively
Connect Pile feeder and vibration hammer；
I. piling is vibrated：Vibration on Start-up hydraulic means, projected depth is depressed into by prefabricated pile；
J. stake operation under next prefabricated pile is carried out；
K. injection composite pile stake between rotary churning pile or mixing pile.
Further, desired depth described in step b is reported according to experiment and geologic prospect and determined, both prevents drilling predetermined
Depth collapse hole, ensures that soil cement lifting height is less than desired depth after press-in prefabricated pile again.
Further, the drilling speed of auger stem and the height of high-pressure injection spray power according to experiment and geology in step c
Prospecting report is determined, it is ensured that slurries and soil are sufficiently mixed, and forms homogeneous soil cement；Ensure that soil cement drilling diameter is slightly larger than top
Drilling diameter in desired depth, larger is engaged with rotary churning pile.
Further, described rotary churning pile is, by high pressure spray jetting, soil, slurries, cutting soil, to form cement earth pile；
While described mixing pile is by drilling tool cutting soil, slurries, the drilling tool stirring soil body and slurries, the soil cement of formation are injected
Stake.
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, overcome that traditional pile sinking mode is present the characteristics of not being suitable for the stratum such as sandy gravel, drift sand, it is shown that greatly
Superiority.
3rd, slurries are configured in advance, form the high parameters index controllability of soil cement uniformity strong.
4th, the pile foundation of civil construction project is can be widely applied to, fender post, the sealing curtain of deep-foundation pit engineering is applied also for
Curtain etc..
5th, be conducive to promoting 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 accompanying drawing used required 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
The present invention is continued below in conjunction with the accompanying drawings 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；Sealing effect passes through rotary churning pile between composite pile soil cement and composite pile
Or mixing pile occlusion is realized.Prefabricated pile in pile foundation engineering is incorporated into the building enclosure in deep-foundation pit engineering by the invention, is become
Squeezing Soil Pile is low Squeezing Soil Pile, expands prefabricated pile stratum applicability；Stake processed and pile quality are ensure that, prefabricated pile can be reached smoothly
Projected depth, it is to avoid cut stake；Fender post and sealing are combined.The present invention is described in detail below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of large size prefabricated building enclosure of deep basal pit, including composite pile and between adjacent composite pile
And the rotary churning pile or mixing pile 3 being engaged with composite pile, described composite pile includes a prefabricated pile 2, and is filled in
The soil cement 1 of the outer ring of prefabricated pile 2, described soil cement 1 is monolithically fabricated a cylindrical composite pile structure with prefabricated pile 2.
Further, described soil cement 1 is engaged guarantee sealing with rotary churning pile between composite pile or mixing pile.
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, rotary churning pile or mixing pile are engaged size with composite pile and determined by design, rotary churning pile or mixing pile axis
Compared with composite pile axis, on the outside of deviation foundation ditch, it is ensured that under the effect of outer lateral earth pressure, occlusal surface is pressurized, and water-stagnating effect is good.
Further, the cross section of described prefabricated pile 2 is rectangle, I-shaped, circular or trapezoidal.
Further, the axis for the outer ring that the axis of described prefabricated pile 2 is formed with soil cement is overlapped.
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 is positioned, and all-hydraulic drill centering is in place；
B. drilling and forming hole：Start all-hydraulic drill, auger stem is drilled down into desired depth along leading truck, lifts spiral
Bore, soil all takes out in desired depth；
C. drilling, mud jacking are continued：Descend auger stem to desired depth again, high pressure spray jetting, slurries are gentle in drilling；
High-pressure injection cutting soil, makes aperture increases under desired depth；By auger stem Stirring water, slurries and the soil body into cement
Soil, drilling to projected depth lifts auger stem, into cement earth pile；
D. all-hydraulic drill is shifted：Carry out next composite 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 and is higher by pile extension platform at the top of first segment prefabricated pile, prefabricated pile, reserves pile extension work
Face, passes through pile extension platform fixture locking prefabricated pile；
G. pile extension, put stake：Pedrail crane is lifted by crane above second section prefabricated pile to first segment prefabricated pile, is opened after mechanical pile extension
Pile extension platform fixture, prefabricated pile sinks 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, projected depth is depressed into by prefabricated pile；
J. stake operation under next prefabricated pile is carried out；
K. injection composite pile stake between rotary churning pile or mixing pile.
Further, desired depth described in step b is reported according to experiment and geologic prospect and determined, both prevents drilling predetermined
Depth collapse hole, ensures that soil cement lifting height is less than desired depth after press-in prefabricated pile again.
Further, it is described drilling speed and height spray power according to experiment and geologic prospect report determine, it is ensured that slurries and
Soil is sufficiently mixed, and forms homogeneous soil cement；Ensure soil cement drilling diameter slightly larger than drilling diameter in the desired depth of top, with rotation
Spray stake occlusion larger.
Further, the preferred rectangle of the prefabricated stake cross sectional shape, sectional dimension be 500 × 500mm~1200 ×
1200mm, can also be I-shaped, circular, trapezoidal etc..
Further, the prefabricated pile length is 10m~40m, is at most divided into 3 sections, often saves length and is not preferably greater than 15m.
Instant invention overcomes traditional pile sinking mode exist the characteristics of not being suitable for the stratum such as sandy gravel, drift sand, 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 are configured in advance, form the high parameters index controllability of soil cement uniformity strong.It can be widely applied to civil construction work
The pile foundation of journey, applies also for fender post, water-stop curtain of deep-foundation pit engineering etc..Be conducive to promoting Urban Underground Space Excavation
Prefabricated industrialized development.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
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 deform still within protection scope of the present invention that creative work can make.
Claims (10)
1. a kind of construction method of the large size prefabricated building enclosure of deep basal pit, it is characterised in that comprise the steps：
A. all-hydraulic drill is in place：Peg is positioned, and all-hydraulic drill centering is in place；
B. drilling and forming hole：Start all-hydraulic drill, auger stem is drilled down into desired depth along leading truck, lifts auger
Bar, soil in desired depth is all taken out；
C. continue to creep into, whitewash：Auger stem is descended again to desired depth, high pressure spray jetting, slurries, gas, high pressure in drilling
Spray cutting soil so that the following aperture increases of desired depth；Rotated by auger stem, mixing water, slurries and the soil of cutting
Body, forms soil cement, and drilling to projected depth lifts auger stem, into cement earth pile；
D. all-hydraulic drill is shifted：Carry out next composite 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 and is higher by pile extension platform at the top of first segment prefabricated pile, prefabricated pile, reserves pile extension working face, Gu
Determine prefabricated pile；
G. pile extension, put stake：Pedrail crane is lifted by crane above second section prefabricated pile to first segment prefabricated pile, and pile extension is opened after mechanical pile extension
Platform locking cylinder, prefabricated pile sinks by gravity；
H. Pile feeder and vibration hammer are connected；When prefabricated pile can not sink by gravity, pile extension platform oil cylinder locking is sequentially connected and sent
Stake device and vibration hammer；
I. piling is vibrated：Vibration on Start-up hydraulic means, projected depth is depressed into by prefabricated pile；
J. stake operation under next prefabricated pile is carried out；
K. injection composite pile stake between rotary churning pile or mixing pile.
2. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 1, it is characterised in that including
Composite pile and the rotary churning pile or mixing pile being engaged between adjacent composite pile and with composite pile, described composite pile bag
A prefabricated pile is included, and is filled in the soil cement of prefabricated pile outer ring, described soil cement is monolithically fabricated a circle with prefabricated pile
The composite pile structure of cylindricality.
3. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 2, it is characterised in that described
Soil cement be engaged with rotary churning pile between composite pile or mixing pile guarantee sealing.
4. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 2, it is characterised in that described
Rotary churning pile or mixing pile axis compared with composite pile axis, rotary churning pile or mixing pile axis deviation foundation ditch on the outside of.
5. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 1, it is characterised in that described
The cross section of prefabricated pile be rectangle, I-shaped, circular or trapezoidal.
6. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 1, it is characterised in that described
The axis of outer ring that is formed with soil cement of axis of prefabricated pile overlap.
7. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 1, it is characterised in that step
Desired depth described in b is reported according to experiment and geologic prospect and determined, both prevents the desired depth collapse hole that drills, and ensures that press-in is pre- again
Soil cement lifting height is less than desired depth after stake processed.
8. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 1, it is characterised in that step
The drilling speed of auger stem and the height of high-pressure injection spray power and report determination according to experiment and geologic prospect in c, it is ensured that slurries
It is sufficiently mixed with soil, forms homogeneous soil cement；Ensure that soil cement drilling diameter is slightly larger than drilling diameter in the desired depth of top, with
Rotary churning pile is engaged larger.
9. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 1, it is characterised in that step
Rotary churning pile described in k is, by high pressure spray jetting, soil, slurries, cutting soil, to form cement earth pile.
10. a kind of construction method of the large size prefabricated building enclosure of deep basal pit as claimed in claim 1, it is characterised in that step
While mixing pile described in rapid k is by drilling tool cutting soil, slurries, the drilling tool stirring soil body and slurries are injected, formation
Cement earth pile.
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| CN201610111348.7A CN105714832B (en) | 2016-02-29 | 2016-02-29 | A kind of large size prefabricated building enclosure of deep basal pit and construction method |
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| CN201610111348.7A CN105714832B (en) | 2016-02-29 | 2016-02-29 | A kind of large size prefabricated building enclosure of deep basal pit and construction method |
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| 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 |
| CN107460882B (en) * | 2017-06-20 | 2019-11-26 | 中冶天工集团有限公司 | A kind of retaining piles construction method of deep basal pit closing sealing |
| CN111042107B (en) * | 2019-12-25 | 2021-06-29 | 济南轨道交通集团有限公司 | Large-size precast pile enclosure construction system and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1111230C (en) * | 1994-12-26 | 2003-06-11 | 石寅生 | Making method for non-annular borehole cast-in-place pile |
| CN101328712A (en) * | 2008-07-29 | 2008-12-24 | 上海市第二建筑有限公司 | Construction method of interlocking pile for soft soil and soil layer with obstacle |
| CN101886385B (en) * | 2010-07-28 | 2011-12-21 | 何世鸣 | Construction process of long-auger jet-grouting mixing curtain pile |
| CN102296630A (en) * | 2011-06-17 | 2011-12-28 | 北京中岩大地工程技术有限公司 | Construction method of long-screw high-pressure mix jetting cement diaphragm wall |
| CN104278680A (en) * | 2013-07-01 | 2015-01-14 | 上海城地建设股份有限公司 | Envelope structure combining five (six) shaft mixing piles with press grouting piles and construction method |
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