CN105442532B - Pile crown expands bored pile construction method - Google Patents
Pile crown expands bored pile construction method Download PDFInfo
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- CN105442532B CN105442532B CN201510800739.5A CN201510800739A CN105442532B CN 105442532 B CN105442532 B CN 105442532B CN 201510800739 A CN201510800739 A CN 201510800739A CN 105442532 B CN105442532 B CN 105442532B
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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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
-
- 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
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
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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
Expand bored pile construction method the present invention relates to pile crown, mainly including preparation of construction, make double steel pipe casing, embedded double steel pipe casing, slurrying, pore-forming borehole cleaning, hang steel reinforcement cage, pour the step such as underwater concrete, Stake head handling.Easy construction of the present invention, can flexibly guide the discharge of mud and the recycling of superfilled concrete, and not only eliminate the later stage cuts stake operation, it is to avoid the later stage cuts the pile damage that stake is caused, and speed of application is fast, and cost is substantially reduced.
Description
Technical field
Expand bored pile construction method the present invention relates to a kind of pile crown, belong to foundation treatment engineering field, it is adaptable to
Structure foundation treatment, pile foundation construction.
Background technology
The cast-in-situ bored pile commonly used in current engineering has two kinds of forms, and holing with slurry wall protection bored concrete pile and bushing type drilling are filled
Note stake.Holing with slurry wall protection filling pile construction is by after rig location and installation, hole being prevented in the embedded casing of required bore position
Wall is caved in, and hole wall is protected with mud during drilling, and drilling carries out borehole cleaning, places steel reinforcement cage, casting concrete, concrete after finishing
Conserve, superfilled part concrete is carried out to cut a stake.Bushing type bored pile construction is pressed into steel bushing by drilling machine location and installation
Drilled after pipe, retaining wall is carried out by steel sleeve, bushing type cast-in-situ bored pile need not be carried out borehole cleaning operation, but bushing type drills
Filling pile construction is poured and still needs to that the concrete of superfilled part is carried out to cut stake after finishing.
Bored pile construction noise is small, it is adaptable to build large diameter pile, and small by the influence of topography；But cast-in-situ bored pile into
Quality of pile receives construction infection big, the difficult control of concrete quality, and pile body after the completion of pouring operation needs that superfilled part is carried out to cut stake appearance
Easily pile body is damaged, Stake head handling is time-consuming.
In sum, although existing cast-in-situ bored pile achieves preferable construction effect under suitable engineering specifications,
But existing bored pile construction method need to be processed pile crown, time-consuming.In consideration of it, according to the actual need of current engineering
Want and technical conditions, need a kind of easy construction of invention badly, ambient influnence is small, can be prevented effectively from the Novel drilling bored concrete pile of section stake
Construction method.
The content of the invention
The concrete utilization rate of cast-in-situ bored pile is poured it is an object of the invention to improve, is reduced to superfilled part pile crown
Reason, superfilled part is avoided the formation of when cast-in-situ bored pile is poured, and can be saved the superfilled part of pile crown and be cut stake operation.
To achieve these goals, present invention employs following technical scheme：
Pile crown expands bored pile construction method, it is characterised in that comprise the following steps：
1) preparation of construction：Smooth, reasonable Arrangement builder's road and sequence of construction, root should be carried out before construction to construction site
Mark is positioned to each position and carried out according to pile foundation drawing；
2) double steel pipe casing is made：Double steel pile castings are mainly made up of interior steel pipe casing and outer steel pipe casing, interior steel pipe casing
It is cylinder, casing middle part offers 4 symmetrical slime flux holes, close ring limiting plate is provided with below slime flux hole；Outer steel
Cylinder is managed and protected in cone, is mainly made up of top board, base plate, close ring, floor, positioning ring flat-plate and lower cutting plate, top is set on top board
Plate opening, base plate is hinged with outer steel pipe casing, positioning ring flat-plate be located at base plate top, lower cutting plate be located at base plate bottom, close ring by
Two semi-circular sheet steels composition, is connected by floor with outer steel pipe casing, and the close ring other end is provided with for through inserted link
Butt hole；
3) double steel pipe casing is buried：Casing foundation ditch is excavated according to positioning, foundation ditch diameter is more smaller than outer steel pipe casing external diameter,
Double steel pipe casing extruding embedment, the position in slime flux hole is located just at stake top n ear, and double steel pipe shield-tube embedment completes rear perimeter edge
Packing reality is rammed with clay, the plan-position of casing is checked during compacting at any time, adjusted immediately if any off normal, until its outside rammer
Real, casing is steady；
4）Slurrying：Use original soil pulping in cohesive soil, during pore-forming in hole injected clear water, rig cuts when rotating
Soil bits are mixed with water rotation, form mud；
5) pore-forming borehole cleaning：Spiral-digging pore rotates the bit cutting soil body for being inlaid with bucket tooth, drilling process using unit head
In, using mud off drilling process；When collecting mud, inserted link is extracted, mud is flowed into by the slime flux hole on interior steel pipe casing
Outer steel pipe casing, then enters slurry transportation equipment by plate top openings；After the completion of borehole cleaning, insertion inserted link closes close ring；
6) steel reinforcement cage is hung：After the completion of fabrication of reinforcing cage, laid using crane, ensure that steel reinforcement cage is vertical during decentralization, forbidden
Pendulum impact hole wall；
7) underwater concrete is poured：Pouring underwater concrete uses tremie method, and the steel pipe that will be tightly connected is used as concrete
The passage of conveying, isolation environment water makes it not contacted with concrete；During casting concrete, deeper conduit should be kept, reduce coagulation
Native rate of flooding；When concrete surface enters more than reinforcement cage skeleton base opening 4m, conduit is improved, reduces the buried depth of conduit,
In filling process, the buried depth for controlling conduit mouth is 2m ~ 6m；
8) Stake head handling：After the superfilled about 1m of concrete, extract inserted link and open close ring, superfilled part concrete all flows
Go out to form expansion pile head, extract outer steel pipe casing, if expansion pile head absolute altitude does not arrive stake top absolute altitude, using the concrete being scattered or
The soil body is tamped, and finally extracts interior steel pipe casing.
Further, the position in slime flux hole is arranged at stake top absolute altitude in step 2；Slime flux hole is highly 100mm.
Close ring is hinged with floor, and the folding of close ring is realized by the extraction of inserted link.
The characteristics of present invention has following and beneficial effect：
（1）The present invention uses double steel pipe casing, and slime flux hole is provided with interior steel pipe casing, and slime flux hole position is in stake top absolute altitude
Place, after close ring folding, shape in the cavity of the outer squeezed formation of steel pipe casing is discharged to by superfilled part concrete from interior steel pipe casing
Into expansion pile head, not only eliminate the later stage cuts stake operation, it is to avoid the later stage cuts the pile damage that stake is caused, and speed of application
Hurry up.
（2）Using double steel pipe casing, during filling concrete, the mud for squeezing out first passes through interior steel pipe casing streamer
Hole flows into outer steel pipe casing, then enters slurry transportation equipment, collects mud very convenient, it is to avoid mud is caused in earth's surface overflow
Mud contamination.
（3）Close ring is connected by floor by two semi-circular sheet steels with outer steel pipe casing, the other end set butt hole with
Inserted link is communicated, and the opening and closing of close ring is realized by the plug of inserted link.The discharge of mud and the stream of superfilled concrete can flexibly be guided
Enter.
Brief description of the drawings
Fig. 1 is that pile crown expands cast-in-situ bored pile bilayer steel pile casting device stereogram；
Fig. 2 is that pile crown expands steel pipe casing figure in cast-in-situ bored pile bilayer steel pile casting device；
Fig. 3 is that pile crown expands the cast-in-situ bored pile outer steel pipe casing sectional view of bilayer steel pile casting device；
Fig. 4 is that pile crown expands bored pile construction sectional drawing；
Fig. 5 is that pile crown expands cast-in-situ bored pile pile figure；
Fig. 6 is construction flow chart of the present invention；
In figure：Steel pipe casing in 1-, the outer steel pipe casings of 2-, 3- inserted links, 4- plate top openings, 5- butt holes, 6- close rings, 7-
Floor, 8- close ring limiting plates, 9- top boards, 10- base plates, 11- positioning ring flat-plates, cutting plate under 12-, 13- slime fluxs hole, 14- reinforcing bars,
15-PVC sleeve pipes, 16- concrete, 17- mud, 18- foundation soils, 19- expansion pile heads, 20- pile bodies.
Specific embodiment
As shown in figure 1, pile crown expands cast-in-situ bored pile bilayer steel pile casting constructing device mainly by interior steel pipe casing 1 and outer steel
Cylinder 2 is managed and protected to constitute.According to Fig. 2, interior steel pipe casing 1 is cylinder, and internal diameter is 600mm, thick from 12mm, and strength grade is
Q235 hot-rolled coils are rolled and formed.Along offering 4 symmetrical slime flux holes 13, perforate ring week on the interior tube wall of steel pipe casing 1
It is highly 100mm, there are 4 close ring limiting plates 8 near slime flux hole accordingly for being positioned to close ring.
With shown in Fig. 3, in cone, it is Q235 to use strength grade to outer steel pipe casing 2 to reference picture 1, and thickness is 15mm's
Hot-rolled coil rolls, is welded.Outer steel pipe casing it is main by top board 9, base plate 10, close ring 6, floor 7, positioning ring flat-plate 11,
Lower cutting plate 12, butt hole 5 and inserted link 3 are constituted.The a diameter of 1400mm of top board 9, internal diameter is identical with the external diameter of interior steel pipe casing, top board
9 are provided with a plate top openings 4, are easy to the collection of the plug and mud plant of inserted link 3 to mud.Base plate 10 is protected with outer steel pipe
Cylinder 2 is hinged, and a diameter of 1000mm of base plate 10, internal diameter is identical with the external diameter of interior steel pipe casing 1.Positioning ring flat-plate 11 is annular plate,
Width is 100mm, and positioned at the top of base plate 10, effect is the motion for limiting base plate 10 in the horizontal direction, and lower cutting plate 12 is along outer steel pipe
The angle welding of casing 2, incision soil body during for outer steel pipe shield-tube embedment.Close ring 6 passes through floor 7 by two semi-circular sheet steels
It is connected with outer steel pipe casing 2, floor 7 uses hot rolled steel plate, and thick 12mm, strength grade is Q345.The internal diameter of close ring 6 and interior steel pipe
The external diameter of casing is identical, and the other end sets butt hole 5 and communicated with inserted link 3, and the upper diameter of inserted link 3 is more than base diameter, close ring 6
The folding of close ring 6 is realized by the plug of inserted link 3.
Interior steel pipe casing 1 is set in place using vibration hammer, steel pipe casing 1 in cleaning, it is ensured that slime flux hole 13 is located at stake top
At designed elevation, outer steel pipe casing 2 is buried, outer steel pipe casing 2 is positioned by close ring limiting plate 8, check hanging down for steel pipe casing
Straight degree and stability.Outer and inner tube casing is set after finishing, and bored pile construction is carried out using usual manner.
After cast-in-situ bored pile drilling, inserted link 3 being extracted as shown in Figure 4 and opening close ring 6, mud 17 is just along interior steel pipe casing
1 slime flux hole 13 flows to outer steel pipe casing and extrudes in the cavity to be formed, and the plate top openings 4 opened on top board 9 are used at mud plant
Reason mud 17.After the completion of mud conditioning, insertion inserted link 3 is closed close ring 6 and carries out next step operation.
What Fig. 5 was represented is that pile crown expands cast-in-situ bored pile pile figure, after the completion of cast-in-place pile concrete 16 is poured, superfilled part
Concrete stake top formed expansion pile head 19, when superfilled part concrete is inadequate, the concrete being scattered using job site
Tamped.In work progress, PVC casing protection reinforcing bars are put on reinforcing bar 14 more than design of pile top absolute altitude.
Fig. 6 is construction flow chart of the present invention；Pile crown expands bored pile construction method, comprises the following steps：
1) preparation of construction：Smooth, reasonable Arrangement builder's road and sequence of construction should be carried out before construction to construction site, root
Mark is positioned to each position and carried out according to pile foundation drawing.
2) double steel pipe casing is made；
3) double steel pipe casing is buried：Casing foundation ditch is excavated according to positioning, foundation ditch diameter should be omited than the outer external diameter of steel pipe casing 2
Small, double steel pipe casing extruding embedment, the position in slime flux hole 13 is located just at stake top n ear, and shield-tube embedment completes rear perimeter edge and uses
Clay rams packing reality, checks the plan-position of casing during compacting at any time, is adjusted immediately if any off normal, until its outside rammer
Real, casing is steady.
4）Slurrying：Use original soil pulping in cohesive soil, during pore-forming in hole injected clear water, rig cuts when rotating
Soil bits are mixed with water rotation, form mud；Slurrying should select highly plastic clay or bentonite in other soil bodys；When preparing mud
Proportion design should be carried out according to construction machinery, construction technology and situations such as passing through the soil property of soil layer.
5) pore-forming borehole cleaning：Spiral-digging pore rotates the bit cutting soil body for being inlaid with bucket tooth, drilling process using unit head
In, using mud off drilling process.When collecting mud, inserted link 3 is extracted, mud 17 is by the slime flux hole on interior steel pipe casing 1
13 flow into outer steel pipe casing 2, then enter slurry transportation equipment by plate top openings 4.After the completion of borehole cleaning, insertion inserted link is closed
Cyclization.
6) steel reinforcement cage is hung：After the completion of fabrication of reinforcing cage, laid using crane, ensure that steel reinforcement cage is vertical during decentralization, forbidden
Pendulum impact hole wall.
7) underwater concrete is poured：Pouring underwater concrete uses tremie method, and the steel pipe that will be tightly connected is used as concrete
The passage of conveying, isolation environment water makes it not contacted with concrete.During casting concrete, deeper conduit should be kept, reduce coagulation
Native rate of flooding；When concrete surface enters more than reinforcement cage skeleton base opening 4m, conduit is improved, reduces the buried depth of conduit,
In filling process, the buried depth for controlling conduit mouth is 2m ~ 6m.
8) Stake head handling：After the superfilled about 1m of concrete, extract inserted link and open close ring, superfilled part concrete all flows
Go out to form expansion pile head, extract outer steel pipe casing, if expansion pile head absolute altitude does not arrive stake top absolute altitude, using the concrete being scattered or
The soil body is tamped, and finally extracts interior steel pipe casing.
Claims (4)
1. pile crown expands bored pile construction method, it is characterised in that comprise the following steps：
1) preparation of construction：Smooth, reasonable Arrangement builder's road and sequence of construction should be carried out before construction to construction site, according to stake
Base drawing is positioned to each position and is carried out mark；
2) double steel pipe casing is made：Double steel pile castings are mainly made up of interior steel pipe casing and outer steel pipe casing, and interior steel pipe casing is circle
Cylindricality, casing middle part offers 4 symmetrical slime flux holes, and close ring limiting plate is provided with below slime flux hole；Outer steel pipe shield
Cylinder is mainly made up of in cone top board, base plate, close ring, floor, positioning ring flat-plate and lower cutting plate, top board is set on top board and is opened
Mouthful, base plate is hinged with outer steel pipe casing, and positioning ring flat-plate is located at base plate top, and lower cutting plate is located at base plate bottom, and close ring is by two
Semi-circular sheet steel is constituted, and is connected with outer steel pipe casing by floor, and the close ring other end is provided with for the docking through inserted link
Hole；
3) double steel pipe casing is buried：Casing foundation ditch is excavated according to positioning, foundation ditch diameter is more smaller than outer steel pipe casing external diameter, double steel
Cylinder extruding embedment is managed and protected, the position in slime flux hole is located just at stake top n ear, and double steel pipe shield-tube embedment completes rear perimeter edge and uses viscous
Earth rammer packing reality, checks the plan-position of casing at any time during compacting, adjusted immediately if any off normal, until its outside compacting,
Casing is steady；
4）Slurrying：Original soil pulping is used in cohesive soil, during pore-forming in hole injected clear water, rig rotate when cut soil bits
Mixed with water rotation, form mud；
5) pore-forming borehole cleaning：Spiral-digging pore rotates the bit cutting soil body for being inlaid with bucket tooth using unit head, in drilling process, adopts
Use mud off drilling process；When collecting mud, inserted link is extracted, mud flows into outer steel pipe by the slime flux hole on interior steel pipe casing
Casing, then enters slurry transportation equipment by plate top openings；After the completion of borehole cleaning, insertion inserted link closes close ring；
6) steel reinforcement cage is hung：After the completion of fabrication of reinforcing cage, laid using crane, ensure that steel reinforcement cage is vertical during decentralization, forbid to swing
Collision hole wall；
7) underwater concrete is poured：Pouring underwater concrete uses tremie method, and the steel pipe that will be tightly connected is used as concrete conveyance
Passage, isolation environment water makes it not contacted with concrete；During casting concrete, conduit should be kept embedding relatively deep, reduce coagulation
Native rate of flooding；When concrete surface enters more than reinforcement cage skeleton base opening 4m, conduit is improved, reduces the buried depth of conduit,
In filling process, the buried depth for controlling conduit mouth is 2m ~ 6m；
8) Stake head handling：After the superfilled 1m of concrete, extract inserted link and open close ring, all outflow is formed superfilled part concrete
Expansion pile head, extracts outer steel pipe casing, if expansion pile head absolute altitude does not arrive stake top absolute altitude, is entered using the concrete or the soil body that are scattered
Row is tamped, and finally extracts interior steel pipe casing.
2. pile crown according to claim 1 expands bored pile construction method, it is characterised in that slime flux hole in step 2
Position is arranged at stake top absolute altitude.
3. pile crown according to claim 1 expands bored pile construction method, it is characterised in that slime flux hole is high in step 2
It is 100mm to spend.
4. pile crown according to claim 1 expands bored pile construction method, it is characterised in that in step 2 close ring with
Floor is hinged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510800739.5A CN105442532B (en) | 2015-11-19 | 2015-11-19 | Pile crown expands bored pile construction method |
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| CN201510800739.5A CN105442532B (en) | 2015-11-19 | 2015-11-19 | Pile crown expands bored pile construction method |
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| CN105442532A CN105442532A (en) | 2016-03-30 |
| CN105442532B true CN105442532B (en) | 2017-05-31 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316291A (en) * | 2018-04-12 | 2018-07-24 | 浙江大学城市学院 | Deep mud pit cast-in-situ bored pile and construction method |
| CN108532637A (en) * | 2018-04-27 | 2018-09-14 | 上海建工二建集团有限公司 | It is inverse to make stage integration vertical support system and its installation method |
| CN110067245A (en) * | 2019-03-22 | 2019-07-30 | 西南交通大学 | It is a kind of can expanding reinforcing spiral self-drilling type piling bar and its method of construction |
| CN110273422A (en) * | 2019-06-28 | 2019-09-24 | 中国二十冶集团有限公司 | Method for chiseling pile head of filling pile |
| CN110700241A (en) * | 2019-10-08 | 2020-01-17 | 上海建工一建集团有限公司 | Cast-in-situ bored pile and construction method thereof |
| CN111663575B (en) * | 2020-06-23 | 2021-09-21 | 中国五冶集团有限公司 | Construction method for post-forming waterproof construction of pile head |
| CN112096326B (en) * | 2020-09-19 | 2022-07-01 | 深圳鹏城岩土科技有限公司 | Device and method for removing mud in cast-in-situ bored pile hole |
| CN113123343A (en) * | 2021-04-14 | 2021-07-16 | 四川瑞云建设工程有限公司 | Small-volume cast-in-place pile underwater pouring equipment and construction method |
| CN114032889A (en) * | 2021-12-10 | 2022-02-11 | 上海建工五建集团有限公司 | Combined pile foundation casing positioning device and using method thereof |
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| JP2001288741A (en) * | 2000-04-10 | 2001-10-19 | Nkk Corp | Screwed type steel pipe pile and method for constructing the same |
| CN101638891A (en) * | 2009-08-18 | 2010-02-03 | 上海市第二建筑有限公司 | Construction method of all casing precessing isolation pile |
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| CN105442532A (en) | 2016-03-30 |
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Effective date of registration: 20181225 Address after: 266061 No. 17 Haier Road, Laoshan District, Qingdao City, Shandong Province Patentee after: QINGDAO HAIDE ENGINEERING GROUP Co.,Ltd. Address before: 310015 room 1901, unit 3, 3 Wanda Commercial Center, Gongshu District, Hangzhou, Zhejiang. Patentee before: HANGZHOU JIANGRUN TECHNOLOGY Ltd. |
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Effective date of registration: 20221014 Address after: 266061 Floor 27, Building 1, No. 28, Miaoling Road, Laoshan District, Qingdao, Shandong Patentee after: Qingdao Haide Design&Research Institute Co.,Ltd. Address before: 266061 No. 17 Haier Road, Laoshan District, Qingdao City, Shandong Province Patentee before: QINGDAO HAIDE ENGINEERING GROUP Co.,Ltd. |
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