CN108842807A - A kind of construction technology of the embedding rock single pile of offshore wind power foundation embedded type - Google Patents
A kind of construction technology of the embedding rock single pile of offshore wind power foundation embedded type Download PDFInfo
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- CN108842807A CN108842807A CN201810698964.6A CN201810698964A CN108842807A CN 108842807 A CN108842807 A CN 108842807A CN 201810698964 A CN201810698964 A CN 201810698964A CN 108842807 A CN108842807 A CN 108842807A
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- 238000010276 construction Methods 0.000 title claims abstract description 54
- 239000011435 rock Substances 0.000 title claims abstract description 40
- 238000005516 engineering process Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 103
- 239000010959 steel Substances 0.000 claims abstract description 103
- 238000005266 casting Methods 0.000 claims abstract description 90
- 238000000034 method Methods 0.000 claims abstract description 79
- 238000005553 drilling Methods 0.000 claims abstract description 70
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 13
- 238000013461 design Methods 0.000 claims abstract description 9
- 238000002513 implantation Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000007569 slipcasting Methods 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 230000001174 ascending effect Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000012552 review Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000010438 granite Substances 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000008267 milk Substances 0.000 claims description 3
- 210000004080 milk Anatomy 0.000 claims description 3
- 235000013336 milk Nutrition 0.000 claims description 3
- 230000010412 perfusion Effects 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 241000282693 Cercopithecidae Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- Engineering & Computer Science (AREA)
- General 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)
- Foundations (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 construction technologies of the embedding rock single pile of offshore wind power foundation embedded type, including following below scheme：Steel-pipe pile and steel pile casting production, the inserting of steady stake putting up platform, steel pile casting, steel pile casting vibration set, drill, the implantation of borehole cleaning, steel-pipe pile, back cover concrete placings, the rockfill grouting of stake outer wall and recycles steel pile casting；Drilling process includes drilling machine in place, installation drilling rod, slurrying and drilling and forming hole step；Before the drilling and forming hole step for completing drilling process, in order to prevent collapse hole, advanced horizontal high voltage jet grouting pile construction；Construction of High Pressure Jet Grouting Pile includes drilling, lower injection pipe, injection, pile process.Construction technology of the invention, using steady stake platform auxiliary positioning, embedding rock construction is carried out using steel pile casting, it hangs ship using main and auxiliary hang ship cooperation and steel-pipe pile is lifted by crane and be inserted into steel pile casting, it can be improved construction efficiency, the horizontal resistivity and anti-group of ability for effectively improving embedded rock pile, meet the requirement of Structural Design and construction.
Description
Technical field
The present invention relates to a kind of construction technologies of the embedding rock single pile of offshore wind power foundation embedded type.
Background technique
Wind power plant basic engineering field at sea, according to different earth formation and characteristic, and according to each rock-soil layer origin cause of formation
Type and engineering characteristic carry out comprehensive division, and the single-pile foundation generallyd use includes non-embedding rock single pile, embedding rock single pile and embedded type
Embedding rock single pile.The construction of pile foundation is the leading engineering of offshore wind farm project, and for separate land and the depth of water is up to 16m~19m's
Off-lying sea carries out the construction of offshore wind farm without shielding region, due to the constraint by natural conditions such as meteorology, trend, waves, and is in
Take place frequently region and Fan Equipment of tropical storm has very high requirement to the carrying on basis, withdrawal resistance, deformation, it is therefore desirable to
Pile foundation diameter is big, embedded depth is deep, so that blower foundation can bear huge blower tilting moment and bear wave, water flow lotus
Load effect, there are also be exactly construction speed duration control it is particularly critical.
Summary of the invention
A kind of embedding rock list of offshore wind power foundation embedded type is provided it is an object of the invention to overcome the deficiencies of existing technologies
The construction technology of stake, it can be improved construction efficiency, effectively improves the horizontal resistivity and anti-group of ability of embedded rock pile, meets work
The requirement of journey structure design and construction.
The object of the present invention is achieved like this：Involved by a kind of construction technology of the embedding rock single pile of offshore wind power foundation embedded type
And single pile using diameter 6.7m, 60~80mm of wall thickness steel-pipe pile, squeeze into cataclastic shape strong weathered granite, total embedded depth
For 22.9~27.6m, height of pile top 15m, stake bottom about -43~-46m of absolute altitude；
Construction technology of the invention includes following below scheme：Steel-pipe pile and steel pile casting production, steady stake putting up platform, steel pile casting are inserted
Dress, steel pile casting vibration set, drill, the implantation of borehole cleaning, steel-pipe pile, back cover concrete placings, the rockfill grouting of stake outer wall and recycle steel pile casting；Its
In,
The steel-pipe pile and steel pile casting production process include tube coupling blanking, tube coupling retaining wall on slope, tube coupling roll-forming, pile body
Top flange assembly, pile body splicing and corrosion-inhibiting coating coating step；
The steady stake putting up platform process includes the following steps：
1. steady stake platform includes upper and lower platform, four auxiliary process stakes, two positioning process stakes and a set of positioning system；
Lower platform and four auxiliary process stakes are positioned by steel-pipe pile relative position at the Longkou of locating platform ship and lower platform, then
The inserting piling of four auxiliary process stakes is carried out, then leads to auxiliary process stake and the auxiliary process pipe casing upper and lower part on lower platform
Cross steel plate strip firm welding；
2. first removing locating platform ship, then two positioning process stakes of inserting piling, then will be in positioning process stake and lower platform
Positioning process pipe casing upper and lower part passes through steel plate strip firm welding；
3. installing upper mounting plate after steel pile casting inserting process；
The steel pile casting inserting process includes the following steps：
1. the lower platform of steady stake platform is processed into guiding body panel, the center for being oriented to body panel is in steel-pipe pile
The heart；
2. lifting lug is arranged at 2m below steel pile casting top surface, hangs ship using auxiliary and lift by crane steel pile casting；Steel pile casting is hung by auxiliary
Ship is lifted to guiding body panel and slowly falls into, and stops sinking when lower platform of the steel pile casting by guiding body panel, using two
Platform horizontal ruler measures the verticality of steel pile casting, after verticality meets the requirements, passes through hydraulic jack in the bottom of guiding body panel
It holds tightly, then slowly sinks；
3. when steel pile casting is drowned into mud face intersection, the verticality of measurement review steel pile casting meets the requirements and is further continued for down
It is sink to stabilization, then is covered using hydraulic four-axle linkage vibration hammer at the top of steel pile casting, lifts by crane hydraulic four-axle linkage vibration hammer with the auxiliary ship that hangs,
It carries out vibration dip to steel pile casting to set, the used in-degree to steel pile casting, which reaches, stops hammer standard, stops the verticality of hammer review steel pile casting, meets
Design requirement reinforces steel pile casting and the connection for being oriented to body panel again；
The drilling process includes drilling machine in place, installation drilling rod, slurrying and drilling and forming hole step；
When carrying out drilling machine step in place, hydraulic four-axle linkage vibration hammer is first hung, then set up drilling machine, is bored using hobboing cutter is configured with
The gas lift reverse circulation hydraulic power drilling machine of head is locked drilling machine and steel pile casting by pile gripper；
When carrying out installation drilling rod step, drill bit, drilling rod are installed to drilling machine after assembly well on the main deck for hanging ship again
On；
Carry out slurrying step when, slurry coat method using do not disperse, low solid phase, highly viscous PHP high performance slurry, first
Bentonite slurry is stirred using slurry mixer in mud pit, is then pumped in steel pile casting using slush pump, works as steel pile casting
Aperture is crept into after interior mud property index meets construction requirement；
Carry out drilling and forming hole step when, drilling machine starting drilling when, bore diameter is ascending, top loosely soil layer when bore
Aperture, bore diameter should be 200mm or more smaller than the internal diameter of steel-pipe pile, and bore diameter should be expanded by encountering the hard lithosphere in lower part,
Bore diameter is 100mm~200mm bigger than the internal diameter of steel-pipe pile；
When carrying out the borehole cleaning process, by drilling tool lifting extremely from 30~50cm of bottom hole, slow rotary tools, and supplement high-quality
Mud carries out reacting cycle borehole cleaning, while head in retaining hole, prevents collapse hole；
When carrying out steel-pipe pile implantation process, drilling machine is first removed, ship is hung using main and auxiliary hangs by the way of ship cooperates and lift
Steel-pipe pile is refuted into upper lifting and soldier piles from pile transport, and ship is hung by master, steel-pipe pile is put into steel pile casting, then passes through positioning system
System positions steel-pipe pile to the pile center position of steel pile casting, then holds steel-pipe pile tightly using the jack on lower platform, confirms steel pipe
The centre deviation of stake in error, and the verticality for checking steel-pipe pile meet the requirements after hang ship using main and slowly transfer steel-pipe pile,
Until steel-pipe pile stops sinking, hydraulic pile hammer is then set at the top of steel-pipe pile, it is hydraulic to beat after steel-pipe pile is sink to certainly and stablizes
The small energy of pile monkey slowly hammers stake top tooling flange, and the hit energy of hydraulic pile hammer is ascending, until steel-pipe pile arrival is set
Count bottom absolute altitude；
When carrying out the back cover concrete placings process, back cover height is 1.5m, using C40 non-dispersible underwater concrete, and is adopted
Three point perfusions, including conduit installation, secondary pile hole cleaning, underwater concreting and strike-on step are carried out with vertical conduit method；
When carrying out the stake outer wall rockfill grouting process, i.e., it is in the milk between the bottom outer wall of steel-pipe pile and ground；
When carrying out the recycling steel pile casting process, steel pile casting is extracted by hydraulic four-axle linkage vibration hammer.
The construction technology of the embedding rock single pile of above-mentioned offshore wind power foundation embedded type, wherein complete the brill of the drilling process
Into before pore formation step, in order to prevent collapse hole, advanced horizontal high voltage jet grouting pile construction；Construction of High Pressure Jet Grouting Pile includes drilling, lower injection
Pipe, injection, pile process；Drill internal diameter Φ 600mm, and the inner wall 300mm along internal diameter Φ 750mm steel pile casting is circumferentially disposed, adjacent
Hole overlaps 100mm；When whirl spraying, injection pressure is 0.6~0.8MPa, and injection flow is 0.8~1.2m3/min；Injection pipe is promoted
Speed is 10~15cm/min, and injection pipe revolving speed is 10~15r/min.
The construction technology of the embedding rock single pile of above-mentioned offshore wind power foundation embedded type, wherein carrying out the steel-pipe pile implantation
When process, stake top tooling flange should be installed at the top of steel-pipe pile, stake top tooling flange is L tee section structure, by coupling spiral shell
Bolt is fitted closely with stake top flange and is connect.
The construction technology of the embedding rock single pile of above-mentioned offshore wind power foundation embedded type, wherein the back cover concrete placings process
When conduit installation steps, job platform first is set up at the top of the steel-pipe pile, three internal diameters are installed on the job platform is
The conduit of 300mm and the grouting hopper being connect with three with the top of three conduits；Three conduits are in their line of centres
The mode of equilateral triangle is arranged in stake holes, and the long flow radius 2.5 for being equal to concrete of each edge of equilateral triangle~
4.0m, the bottom end of every conduit are 30~50cm apart from stake holes bottom；When carrying out secondary pile hole cleaning step, first by air hose tripping in conduit
Interior, air hose top is connected by special joint with the tracheae of air compressor machine, and special joint is connect with conduit；Then conduit is mentioned
Certain altitude is played, which determined according to the precipitating thickness at stake holes bottom, and air compressor machine gas supply is then turned on, and gas lift reverse circulation is normal
Afterwards, conduit is slowly transferred in circulation, until conduit is transferred to stake holes bottom, sand content is met the requirements in mud to be discharged, i.e.,
Stake holes bottom sediment is removed clean；When carrying out underwater concreting step, it is pumped in conduit after live mixing concrete, from hole
Bottom up pours；When carrying out strike-on step, steel-pipe pile is struck to designed elevation before concrete initial set using hydraulic pile hammer.
The construction technology of the embedding rock single pile of above-mentioned offshore wind power foundation embedded type, wherein carry out the stake outer wall backfill and fill
When starching process, four sets of grouting systems are set, and every set grouting system includes four Grouting Pipes and four return pipes；When slip casting first
Slip casting is carried out to stake end grouting system, blocks return pipe when return pipe pulp, slip casting is continued to Grouting Pipe, until reaching volume
Grouting pressure is determined, after flow rate of grouting is less than 2L/min and maintains 0.5h under specified grouting pressure, or during slip casting suddenly
When there is the case where flow rate of grouting increases, grouting pressure is die-offed, stops slip casting and block grouting port.
The construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention is adopted using steady stake platform auxiliary positioning
Carry out embedding rock construction with steel pile casting, using it is main hang ship and it is auxiliary hang ship cooperation steel-pipe pile lift by crane to and is inserted into steel pile casting, can be efficient complete
At piling construction, it is also equipped with adaptable hammering equipment and drilling device, the posture of monitored over time and adjustment steel-pipe pile, to guarantee
Single pile is smooth and is vertically driven into marine rock layer, while taking specific aim measure, and hole wall is kept to stablize, pre- preventing sticking,
The appearance of the unusual conditions such as burying not only ensure that the bearing capacity of embedding rock single pile and the stability of pile body, also effectively increase and apply
Work efficiency rate, and the horizontal resistivity and anti-group of ability of embedded rock pile are effectively improved, meet Structural Design and construction
It is required that.
Detailed description of the invention
Fig. 1 is the flow chart of the construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention；
Fig. 2 a is the master for the steady stake platform that the construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention uses
View；
Fig. 2 b is the floor map of the upper platform in the lower platform of steady stake platform of the invention；
Fig. 2 c is the floor map of lower layer's platform in the lower platform of steady stake platform of the invention；
Fig. 3 is that the construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention is carrying out steel-pipe pile implantation process
When state diagram；
Fig. 4 is that the construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention is carrying out back cover concrete placings process
The structural schematic diagram of the grouting system of Shi Caiyong；
Fig. 5 is that the construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention is carrying out back cover concrete placings process
When conduit layout drawing；
Fig. 6 is that the construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention is carrying out the rockfill grouting of stake outer wall
The schematic diagram at grouting position when process.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
Please refer to Fig. 1 to Fig. 6, list involved in the construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention
Stake is squeezed into cataclastic shape strong weathered granite, total embedded depth is 22.9 using the steel-pipe pile of diameter 6.7m, 60~80mm of wall thickness
~27.6m, height of pile top 15m, stake bottom about -43~-46m of absolute altitude.
The construction technology of the embedding rock single pile of offshore wind power foundation embedded type of the invention includes following below scheme：Steel-pipe pile and steel shield
Cylinder production, the inserting of steady stake putting up platform, steel pile casting, steel pile casting vibration sets, drills, borehole cleaning, steel-pipe pile are implanted into, back cover concrete placings, stake
Outer wall rockfill grouting and recycling steel pile casting.
Steel-pipe pile and steel pile casting production process include tube coupling blanking, tube coupling retaining wall on slope, tube coupling roll-forming, pile body top
Flange assembly, pile body splicing and corrosion-inhibiting coating coating step.
Steady stake platform 10 includes upper mounting plate 12, the auxiliary process stake 13, two of lower platform 11, four positioning process stake 14, outer
Longkou beam 15 and a set of positioning system being made of 12 100T jack 20；Lower platform 11 is by upper platform 111 and lower layer
Platform 112 is constituted, and arranges seven jack 20 around Longkou on upper platform 111, lower layer's platform 112 is around Longkou and and upper layer
Seven jack 20 on platform 111 arrange five jack 20 with being staggered；Outer Longkou beam 15 is pacified after steel-pipe pile 100 enters Longkou
Mounted in the Longkou of upper platform 111 (see Fig. 2 a to Fig. 2 c).
Steady stake putting up platform process includes the following steps：
1. steady stake platform includes upper and lower platform, four auxiliary process stakes, two positioning process stakes and a set of by 12 100T
The positioning system of jack composition；Lower platform and four auxiliary process stakes pass through steel pipe at the Longkou of locating platform ship and lower platform
Stake relative position is positioned, then carries out the inserting piling of four auxiliary process stakes, then by auxiliary process stake with it is auxiliary on lower platform
Assistant engineer skill pipe casing upper and lower part passes through steel plate strip firm welding；
2. first removing locating platform ship, then two positioning process stakes of inserting piling, then will be in positioning process stake and lower platform
Positioning process pipe casing upper and lower part passes through steel plate strip firm welding；
3. upper mounting plate is installed after steel pile casting inserting process, to carry out embedding rock construction.
Steel pile casting inserting process includes the following steps：
1. the lower platform of steady stake platform is processed into guiding body panel, the center for being oriented to body panel is in steel-pipe pile
The heart；
2. lifting lug is arranged at 2m below steel pile casting top surface, hangs ship using auxiliary and lift by crane steel pile casting；Steel pile casting is hung by auxiliary
Ship is lifted to guiding body panel and slowly falls into, and stops sinking when lower platform of the steel pile casting by guiding body panel, using two
Platform horizontal ruler measures the verticality of steel pile casting, after verticality meets the requirements, passes through hydraulic jack in the bottom of guiding body panel
It holds tightly, then slowly sinks；
3. when steel pile casting is drowned into mud face intersection, the verticality of measurement review steel pile casting meets the requirements and is further continued for down
It is sink to stabilization, then is covered using hydraulic four-axle linkage vibration hammer at the top of steel pile casting, lifts by crane hydraulic four-axle linkage vibration hammer with the auxiliary ship that hangs,
It carries out vibration dip to steel pile casting to set, the used in-degree to steel pile casting, which reaches, stops hammer standard, stops the verticality of hammer review steel pile casting, meets
Design requirement reinforces steel pile casting and the connection for being oriented to body panel again.
Drilling process includes drilling machine in place, installation drilling rod, slurrying and drilling and forming hole step；
When carrying out drilling machine step in place, hydraulic four-axle linkage vibration hammer is first hung, then set up drilling machine, is bored using hobboing cutter is configured with
The gas lift reverse circulation hydraulic power drilling machine of head is locked drilling machine and steel pile casting by pile gripper, and guarantee drill bit of drilling machine center and
On same plumb line, deviation is not greater than 10cm at the center of steel pile casting；
When carrying out installation drilling rod step, when rough drill, drill bit is made of heavy balancer and stem；Drill bit, drilling rod are equal
It is installed on drilling machine again after assembly is good on the main deck for hanging ship, in drilling process, the second section drilling rod and subsequent drilling rod are direct
It is installed on the main platform for hanging ship；
Carry out slurrying step when, slurry coat method using do not disperse, low solid phase, highly viscous PHP high performance slurry, first
Bentonite slurry is stirred using slurry mixer in mud pit, is then pumped in steel pile casting using slush pump, works as steel pile casting
Aperture is crept into after interior mud property index meets construction requirement；
Carry out drilling and forming hole step when, using mud off, at the same should the moisturizing into steel pile casting in time, keep steel pile casting in
Outer head difference；Drilling machine starting drilling when, bore diameter is ascending, top loosely soil layer when bore aperture, bore diameter should compare
The small 200mm or more of the internal diameter of steel-pipe pile, to guarantee the vertical bearing capacity of steel pile casting, encountering the hard lithosphere in lower part should expand
Bore diameter, bore diameter are 100mm~200mm bigger than the internal diameter of steel-pipe pile；
Before carrying out drilling and forming hole step, in order to prevent collapse hole, advanced horizontal high voltage jet grouting pile construction, Construction of High Pressure Jet Grouting Pile
Including drilling, lower injection pipe, injection, pile process；Drill internal diameter Φ 600mm, along the inner wall of internal diameter Φ 750mm steel pile casting
300mm is circumferentially disposed, and adjacent holes overlap 100mm；When whirl spraying, injection pressure be 0.6~0.8MPa, injection flow be 0.8~
1.2m3/min；It is 10~15cm/min that injection pipe, which promotes speed, and injection pipe revolving speed is 10~15r/min.
When carrying out borehole cleaning process, by drilling tool lifting extremely from 30~50cm of bottom hole, slow rotary tools, and high-quality mud is supplemented
Slurry carries out reacting cycle borehole cleaning, while head in retaining hole, prevents collapse hole；
When carrying out steel-pipe pile implantation process, steel pile casting internal drilling and borehole cleaning to designed elevation, and after the completion of whole hole is checked and accepted
Shut down in time and remove drilling rod, first remove drilling machine, it is main hang ship and it is auxiliary hang that ship is in place, hang ship and the auxiliary side hanging ship cooperation and lifting using main
Steel-pipe pile is refuted upper lifting and soldier piles from pile transport by formula, and master hangs ship and connect with the main lifting lug on steel-pipe pile top, auxiliary to hang ship and steel-pipe pile
The turn lifting lug of lower part connects, and hangs ship by master and steel-pipe pile is put into steel pile casting, then positions steel-pipe pile 100 to steel and protects
The pile center position of cylinder 300, then steel-pipe pile is held tightly using the jack on lower platform, confirm the centre deviation of steel-pipe pile in error
It is interior, and the verticality for checking steel-pipe pile meet the requirements after hang ship using main and slowly transfer steel-pipe pile, until steel-pipe pile stops sinking,
Then hydraulic pile hammer is set at the top of steel-pipe pile, after steel-pipe pile is sink to certainly and stablizes, the small energy of hydraulic pile hammer is slowly hammered
Stake top tooling flange, stake top tooling flange are L tee section structure, are fitted closely and are connect with stake top flange by attachment bolt, made
Hydraulic pile hammer hammers on stake top tooling flange, to protect stake top flange to be damaged when beating；Hydraulic pile hammer is hit
It is ascending to beat energy, until steel-pipe pile reaches design bottom absolute altitude；Pile body verticality is paid close attention in pile driving process, it is ensured that steel pipe
The verticality of stake is within 3 ‰ (see Fig. 3)；
When carrying out back cover concrete placings process, back cover height is 1.5m, using C40 non-dispersible underwater concrete, and using vertical
Straight catheter method carries out three point perfusions, including conduit installation, secondary pile hole cleaning, underwater concreting and strike-on step；
When conduit installation steps, job platform is first set up at the top of steel-pipe pile, is installed in three on the job platform
Diameter be 300mm conduit 30 and with three and the sequentially connected grouting interior hopper 31 in the top of three conduits 30 and outer hopper 32
(see Fig. 4 and Fig. 5)；Three conduits 30 are arranged in stake holes in their line of centres mode in equilateral triangle, and equilateral three
Long 2.5~the 4.0m of flow radius for being equal to concrete of angular each edge, the bottom end of every conduit 30 apart from stake holes bottom be 30~
50cm；
When carrying out secondary pile hole cleaning step, first by air hose tripping in conduit, air hose top passes through special joint and air compressor machine
Tracheae connects, and special joint is connect with conduit；Then conduit is lifted into certain altitude, which is according to the heavy of stake holes bottom
Shallow lake thickness determines, is then turned on air compressor machine gas supply, after gas lift reverse circulation is normal, conduit is slowly transferred in circulation, until conduit
Decentralization is to stake holes bottom, and sand content is met the requirements in mud to be discharged, i.e., stake holes bottom sediment is removed clean；
When carrying out underwater concreting step, it is pumped in conduit after live mixing concrete, is up poured from bottom hole；
When carrying out strike-on step, steel-pipe pile is struck to designed elevation before concrete initial set using vibration hammer.
When carrying out stake outer wall rockfill grouting process, i.e., be in the milk between the bottom outer wall and ground of steel-pipe pile 100 (see
Fig. 6)；Four sets of grouting systems are set, and every set grouting system includes four Grouting Pipes and four return pipes；First to stake when slip casting
The grouting system of end carries out slip casting, blocks return pipe when return pipe pulp, continues slip casting to Grouting Pipe, until reaching specified
Grouting pressure, flow rate of grouting goes out suddenly less than 2L/min and after maintaining 0.5h, or during slip casting under specified grouting pressure
When the case where existing flow rate of grouting increases, grouting pressure is die-offed, stops slip casting and block grouting port.
The construction technology of offshore wind power foundation embedded type embedded rock pile of the invention is used using steady stake platform auxiliary positioning
Steel pile casting carries out embedding rock construction, using it is main hang ship and it is auxiliary hang ship cooperation steel-pipe pile lifted by crane to and is inserted into steel pile casting, can efficiently complete
Piling construction is also equipped with adaptable hammering equipment and drilling device, the posture of monitored over time and adjustment steel-pipe pile, to guarantee list
Stake is smooth and is vertically driven into marine rock layer, while taking specific aim measure, and hole wall is kept to stablize, and pre- preventing sticking buries
The appearance of the unusual conditions such as brill, not only ensure that the bearing capacity of non-embedding rock single pile and the stability of pile body, also effectively increases and apply
Work efficiency rate, and the horizontal resistivity and anti-group of ability of embedded rock pile are effectively improved, meet Structural Design and construction
It is required that.
Above embodiments are used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or modification, therefore all equivalent
Technical solution also should belong to scope of the invention, should be limited by each claim.
Claims (5)
1. a kind of construction technology of the embedding rock single pile of offshore wind power foundation embedded type, single pile uses diameter 6.7m, 60~80mm of wall thickness
Steel-pipe pile, squeeze into cataclastic shape strong weathered granite, total embedded depth is 22.9~27.6m, height of pile top 15m, stake bottom
About -43~-46m of absolute altitude；The construction technology includes following below scheme：Steel-pipe pile and steel pile casting production, steady stake putting up platform, steel shield
Cylinder inserting, steel pile casting vibration sets, drills, the implantation of borehole cleaning, steel-pipe pile, back cover concrete placings, the rockfill grouting of stake outer wall and recycle steel pile casting；
It is characterized in that,
The steel-pipe pile and steel pile casting production process include tube coupling blanking, tube coupling retaining wall on slope, tube coupling roll-forming, pile body top
Flange assembly, pile body splicing and corrosion-inhibiting coating coating step；
The steady stake putting up platform process includes the following steps：
1. steady stake platform includes upper and lower platform, four auxiliary process stakes, two positioning process stakes and a set of positioning system；It is lower flat
Platform and four auxiliary process stakes are positioned by steel-pipe pile relative position at the Longkou of locating platform ship and lower platform, then are carried out
Then auxiliary process pipe casing upper and lower part in auxiliary process stake and lower platform is passed through steel by the inserting piling of four auxiliary process stakes
Lath firm welding；
2. first removing locating platform ship, then two positioning process stakes of inserting piling, then by the positioning on positioning process stake and lower platform
Technique pipe casing upper and lower part passes through steel plate strip firm welding；
3. installing upper mounting plate after steel pile casting inserting process；
The steel pile casting inserting process includes the following steps：
1. the lower platform of steady stake platform is processed into guiding body panel, the center for being oriented to body panel is the center of steel-pipe pile；
2. lifting lug is arranged at 2m below steel pile casting top surface, hangs ship using auxiliary and lift by crane steel pile casting；Steel pile casting is risen by the auxiliary ship that hangs
It is hung to guiding body panel and slowly falls into, stop sinking when lower platform of the steel pile casting by guiding body panel, using two water
Leveling ruler measures the verticality of steel pile casting, after verticality meets the requirements, is held tightly in the bottom of guiding body panel by hydraulic jack,
Slowly sink again；
3. when steel pile casting is drowned into mud face intersection, the verticality of measurement review steel pile casting meets the requirements and is further continued for sinking down into
Stablize, then covered using hydraulic four-axle linkage vibration hammer at the top of steel pile casting, hydraulic four-axle linkage vibration hammer is lifted by crane with the auxiliary ship that hangs, to steel
Casing carries out vibration dip and sets, and the used in-degree to steel pile casting, which reaches, stops hammer standard, stops the verticality of hammer review steel pile casting, meets design
It is required that reinforcing steel pile casting again and being oriented to the connection of body panel；
The drilling process includes drilling machine in place, installation drilling rod, slurrying and drilling and forming hole step；
When carrying out drilling machine step in place, hydraulic four-axle linkage vibration hammer is first hung, then set up drilling machine, using being configured with roller cutter bit
Gas lift reverse circulation hydraulic power drilling machine is locked drilling machine and steel pile casting by pile gripper；
When carrying out installation drilling rod step, drill bit, drilling rod are installed on drilling machine after assembly well on the main deck for hanging ship again；
Carry out slurrying step when, slurry coat method using do not disperse, low solid phase, highly viscous PHP high performance slurry, first in mud
Bentonite slurry is stirred using slurry mixer in stock tank, is then pumped in steel pile casting using slush pump, when in steel pile casting
Aperture is crept into after mud property index meets construction requirement；
Carry out drilling and forming hole step when, drilling machine starting drilling when, bore diameter is ascending, top loosely soil layer when bore it is small
Hole, bore diameter should be 200mm or more smaller than the internal diameter of steel-pipe pile, and bore diameter should be expanded by encountering the hard lithosphere in lower part, bore
Bore dia is 100mm~200mm bigger than the internal diameter of steel-pipe pile；
When carrying out the borehole cleaning process, by drilling tool lifting extremely from 30~50cm of bottom hole, slow rotary tools, and high-quality mud is supplemented
Slurry carries out reacting cycle borehole cleaning, while head in retaining hole, prevents collapse hole；
When carrying out steel-pipe pile implantation process, first remove drilling machine, using it is main hang ship and it is auxiliary hang ship cooperate lift by the way of by steel
Tubular pole refutes upper lifting and soldier piles from pile transport, and hangs ship by master and steel-pipe pile is put into steel pile casting, then will by positioning system
Steel-pipe pile is positioned to the pile center position of steel pile casting, then holds steel-pipe pile tightly using the jack on lower platform, confirms steel-pipe pile
Centre deviation in error, and the verticality for checking steel-pipe pile meet the requirements after hang ship using main and slowly transfer steel-pipe pile, until
Steel-pipe pile stops sinking, and hydraulic pile hammer is then set at the top of steel-pipe pile, after steel-pipe pile is sink to certainly and stablizes, hydraulic pile hammer
Small energy slowly hammers stake top tooling flange, and the hit energy of hydraulic pile hammer is ascending, until steel-pipe pile reaches design bottom
Absolute altitude；
When carrying out the back cover concrete placings process, back cover height is 1.5m, using C40 non-dispersible underwater concrete, and using vertical
Straight catheter method carries out three point perfusions, including conduit installation, secondary pile hole cleaning, underwater concreting and strike-on step；
When carrying out the stake outer wall rockfill grouting process, i.e., it is in the milk between the bottom outer wall of steel-pipe pile and ground；
When carrying out the recycling steel pile casting process, steel pile casting is extracted by hydraulic four-axle linkage vibration hammer.
2. the construction technology of the embedding rock single pile of offshore wind power foundation embedded type according to claim 1, which is characterized in that complete
Before the drilling and forming hole step of the drilling process, in order to prevent collapse hole, advanced horizontal high voltage jet grouting pile construction；Construction of High Pressure Jet Grouting Pile
Including drilling, lower injection pipe, injection, pile process；Drill internal diameter Φ 600mm, along the inner wall of internal diameter Φ 750mm steel pile casting
300mm is circumferentially disposed, and adjacent holes overlap 100mm；When whirl spraying, injection pressure be 0.6~0.8MPa, injection flow be 0.8~
1.2m3/min；It is 10~15cm/min that injection pipe, which promotes speed, and injection pipe revolving speed is 10~15r/min.
3. the construction technology of the embedding rock single pile of offshore wind power foundation embedded type according to claim 1, which is characterized in that into
When the row steel-pipe pile is implanted into process, stake top tooling flange should be installed at the top of steel-pipe pile, stake top tooling flange is L tee section
Structure is fitted closely with stake top flange by attachment bolt and is connect.
4. the construction technology of the embedding rock single pile of offshore wind power foundation embedded type according to claim 1, which is characterized in that described
When the conduit installation steps of back cover concrete placings process, job platform first is set up at the top of the steel-pipe pile, in the job platform
It is upper that the conduit and the grouting hopper connecting with three with the top of three conduits that three internal diameters are 300mm are installed；Three conduits with
The mode that their line of centres is in equilateral triangle is arranged in stake holes, and each edge length of equilateral triangle is equal to concrete
2.5~4.0m of flow radius, the bottom end of every conduit are 30~50cm apart from stake holes bottom；When carrying out secondary pile hole cleaning step, first will
In air hose tripping in conduit, air hose top is connected by special joint with the tracheae of air compressor machine, and special joint is connect with conduit；
Then conduit is lifted into certain altitude, which determined according to the precipitating thickness at stake holes bottom, and air compressor machine gas supply, gas are then turned on
Lift reacting cycle it is normal after, slowly transfer conduit in circulation, until conduit is transferred to stake holes bottom, sand content in mud to be discharged
It meets the requirements, i.e., stake holes bottom sediment is removed clean；When carrying out underwater concreting step, it is pumped to after live mixing concrete
In conduit, up poured from bottom hole；When carrying out strike-on step, steel-pipe pile is struck before concrete initial set using hydraulic pile hammer
To designed elevation.
5. the construction technology of the embedding rock single pile of offshore wind power foundation embedded type according to claim 1, which is characterized in that carry out
When the stake outer wall rockfill grouting process, four sets of grouting systems are set, and every set grouting system includes four Grouting Pipes and four
Return pipe；When slip casting first to stake end grouting system carry out slip casting, block return pipe when return pipe pulp, to Grouting Pipe after
Continuous slip casting, until reach specified grouting pressure, after flow rate of grouting is less than 2L/min and maintains 0.5h under specified grouting pressure, or
When occurring the case where flow rate of grouting increases, grouting pressure is die-offed suddenly during slip casting, stops slip casting and block grouting port.
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| CN110777780A (en) * | 2019-10-25 | 2020-02-11 | 天津大学 | Concrete pipe pile offshore pile sinking construction method |
| CN111058439A (en) * | 2019-12-23 | 2020-04-24 | 青岛森建基础工程有限公司 | Construction method of immersed tube rock-socketed cast-in-place pile |
| CN111236215A (en) * | 2020-02-13 | 2020-06-05 | 中交第三航务工程局有限公司 | Rock-socketed construction process of large-diameter steel pipe inclined pile of offshore wind power high-rise pile cap foundation |
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| CN113957900A (en) * | 2021-09-26 | 2022-01-21 | 广东华蕴海上风电科技有限公司 | Grouting and bottoming implementation method for large-diameter rock-socketed single pile |
| CN114370041A (en) * | 2021-12-30 | 2022-04-19 | 中国能源建设集团广东省电力设计研究院有限公司 | Basic platform of offshore converter station |
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| CN110130343A (en) * | 2019-05-09 | 2019-08-16 | 中铁四局集团第二工程有限公司 | Steel casing planting construction method suitable for deep water bare rock condition |
| CN110777780A (en) * | 2019-10-25 | 2020-02-11 | 天津大学 | Concrete pipe pile offshore pile sinking construction method |
| CN111058439B (en) * | 2019-12-23 | 2022-03-08 | 青岛森建基础工程有限公司 | Construction method of immersed tube rock-socketed cast-in-place pile |
| CN111058439A (en) * | 2019-12-23 | 2020-04-24 | 青岛森建基础工程有限公司 | Construction method of immersed tube rock-socketed cast-in-place pile |
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| CN113957900A (en) * | 2021-09-26 | 2022-01-21 | 广东华蕴海上风电科技有限公司 | Grouting and bottoming implementation method for large-diameter rock-socketed single pile |
| CN114482110A (en) * | 2021-12-29 | 2022-05-13 | 湖南省正邦建设工程有限公司 | Steel casing group pile concrete expanded foundation construction device and construction method |
| CN114482110B (en) * | 2021-12-29 | 2024-06-11 | 湖南省正邦建设工程有限公司 | Steel pile casing pile group concrete enlarged foundation construction device and construction method |
| CN114370041A (en) * | 2021-12-30 | 2022-04-19 | 中国能源建设集团广东省电力设计研究院有限公司 | Basic platform of offshore converter station |
| CN114837178A (en) * | 2022-06-09 | 2022-08-02 | 上海博强重工集团有限公司 | Installation method of wind power foundation pile |
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Address after: 200032 No. 139, Xuhui District, Shanghai, Pingjiang Road Patentee after: CCCC THIRD HARBOR ENGINEERING Co.,Ltd. Patentee after: CCCC Third Aviation Bureau Sixth Engineering (Xiamen) Co.,Ltd. Patentee after: XIAMEN BRANCH OF CCCC THIRD HARBOR ENGINEERING Co.,Ltd. Address before: 200032 No. 139, Xuhui District, Shanghai, Pingjiang Road Patentee before: CCCC THIRD HARBOR ENGINEERING Co.,Ltd. Patentee before: CCCC Sanya (Xiamen) Engineering Co.,Ltd. Patentee before: XIAMEN BRANCH OF CCCC THIRD HARBOR ENGINEERING Co.,Ltd. |