CN106930314A - The isosceles triangle steel pile foundation and its construction method of a kind of offshore wind farm engineering - Google Patents
The isosceles triangle steel pile foundation and its construction method of a kind of offshore wind farm engineering Download PDFInfo
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- CN106930314A CN106930314A CN201710258121.XA CN201710258121A CN106930314A CN 106930314 A CN106930314 A CN 106930314A CN 201710258121 A CN201710258121 A CN 201710258121A CN 106930314 A CN106930314 A CN 106930314A
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- 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
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Abstract
The invention discloses the isosceles triangle steel pile foundation and its construction method of a kind of offshore wind farm engineering, piling bar squeezing into specified marine site including three, being distributed in isosceles triangle, fixed mount is inserted on three piling bars and sink to seabed, supporting plate, stake outer sleeve are inserted on every piling bar successively, supporting plate sinks to marine being pressed on fixed mount, stake outer sleeve is sequentially connected and is constituted by a sleeve bottom section, multiple sleeve standard knots, a sleeve top section, the sleeve bottom section of stake outer sleeve is pressed on supporting plate, and the sleeve top section upper end of stake outer sleeve is connected with blower fan tower barrel；By design each component, squeeze into piling bar, be inserted in the steps such as fixed mount supporting plate, stake outer sleeve, connecting fan tower complete construction.Three piling bars of the invention do not undertake the vertical load of superstructure, the separation of vertical load and lateral load so that the diameter of piling bar can be greatly reduced with length, pile body weight is greatly reduced, each single construction weight is relatively small, without large-scale lifting and transporting equipment, convenient construction operation.
Description
Technical field：
The present invention relates to offshore wind farm field of engineering technology, more particularly to a kind of offshore wind farm engineering isosceles triangle steel pile foundation and
Its construction method.
Background technology：
Offshore wind farm as a kind of green clean energy resource, due to its aboundresources, wind speed stabilization, to the negative effect of environment compared with
Less, vision interference it is small, can the advantage such as large-scale development, be constantly subjected to the favor of various countries.The type of foundation of marine wind electric field is main
Have：Gravity type foundation, single-pile foundation, tripod type basis, basic, many pile type foundations of jacket-type etc., wherein single-pile foundation is
Using most base forms.In nearly 2000 stylobate plinth of European offshore wind farm engineering, have 70% for single-pile foundation.
Offshore wind farm single-pile foundation has the characteristics of being simple to manufacture, be not required to arrangement sea bed, and such basis is by welded still pipe group
Into, can be between stake and pylon flange connection, or by after conversion platform leveling reconnect, by tower and piling bar
Transmission fan loads.Depending on the diameter of stake is according to the size of load, generally 3 ~ 5m, wall thickness is about the 1% of a diameter.In China
The single pile steel pipe that quality 285t, diameter 5m, height 42m are employed such as the offshore pile basis of eastern intertidal belt wind electric field engineering in Jiangsu
Pile foundation, after completing steel-pipe pile processing, is transported on harbour and is loaded onto 2000t barges with 600t crane ships, is transported to wind power plant
Location, hydrologic regime according to intertidal zone, it is necessary in high tide level pursuing-tide be transported to wind field.
It can be seen that, traditional single-pile foundation has the characteristics of diameter is big, length is big, weight is big, it is necessary to large-scale lifting and transport
Equipment, difficulty of construction is big.And marine large-scale lifting is very limited with transporting equipment resource, and intertidal zone water level cannot be applied for large-scale
Work ship enters so that the construction of single-pile foundation is limited by factors, and efficiency of construction is relatively low.
Usually, the vertical load of top blower fan is undertaken by the frictional force between single-pile foundation and the soil body, therefore single-pile foundation
Need enough length；Intensity and stiffness reliability that the horizontal loading of blower fan is provided jointly by single-pile foundation and seabed soil, therefore
Single-pile foundation needs enough sectional areas and diameter.Under larger vertical load, horizontal loading, the compound action of moment of flexure, tradition
The diameter of single-pile foundation, length value larger need to could meet requirement.
If the stress approach of pile foundation can be changed, the vertical load of superstructure is set to be directly taken on by seabed soil, and water
Flat load combines shared with moment of flexure by multiple pile foundations, then can greatly reduce the diameter and length of single pile foundation
Degree size, and then its gross weight is reduced, facilitate offshore construction.
It can be seen that, it is necessary to the simple, steel pile foundation of practicality and its construction method in offshore wind farm engineering are inquired into, is promoted existing
The innovation and progress of technology.
The content of the invention：
In order to make up the deficiency of prior art problem, it is an object of the invention to provide a kind of isosceles triangle piling bar of offshore wind farm engineering
Basis and its construction method, its vertical load is directly taken on by seabed soil, and three steel that horizontal loading is distributed by isosceles triangle
Stake and sea bed shared, single construction weight is small, easy construction, for the pile foundation of offshore wind farm engineering provides a kind of new structure
Type.
Technical scheme is as follows：
The isosceles triangle steel pile foundation of offshore wind farm engineering, it is characterised in that including three squeeze into specified marine site, in isosceles triangle point
The piling bar of cloth, is inserted in fixed mount and sinks to seabed on three piling bars, is inserted in supporting plate, stake outer sleeve, supporting plate on every piling bar successively
Sink to it is marine be pressed on fixed mount, stake outer sleeve by a sleeve bottom section, multiple sleeve standard knot, a sleeve top section according to
Secondary to connect and compose, the sleeve bottom section of stake outer sleeve is pressed on supporting plate, and the sleeve top section upper end of stake outer sleeve is connected with blower fan
Tower.
The isosceles triangle steel pile foundation of described offshore wind farm engineering, it is characterised in that described fixed mount includes being distributed in
Three spacing collars one corresponding with three piling bar positions on steel plate, the upper surface of spacing collar one and triangular steel plate upper surface
Concordantly, it is provided with floor between the outer wall of two neighboring spacing collar one and steel plate lower surface.
The isosceles triangle steel pile foundation of described offshore wind farm engineering, it is characterised in that described sleeve bottom section is by steel pipe
Outer uniform, symmetrical six stripe boards of welding are constituted, and overall axisymmetricly state, steel pipe top is welded with ring flange, ring flange
On be uniformly provided with bolt hole, steel pipe bottom is welded with extension disk, and any two adjacent bar plate middle part opposite position is stayed and sets one
To bar shaped bolt hole.
The isosceles triangle steel pile foundation of described offshore wind farm engineering, it is characterised in that described sleeve standard knot is by steel pipe
Outer uniform, symmetrical six stripe boards of welding are constituted, overall axisymmetricly state, and the two ends of sleeve standard knot are welded with flange
Disk, is uniformly provided with bolt hole on ring flange, any two adjacent bar plate middle part opposite position is stayed and sets a pair of bar shaped bolts hole.
The isosceles triangle steel pile foundation of described offshore wind farm engineering, it is characterised in that three described first-class height of piling bar
Connecting plate is connected between the section outer wall stripe board of place adjacent sleeve bottom, between adjacent sleeve standard knot outer wall stripe board.
The isosceles triangle steel pile foundation of described offshore wind farm engineering, it is characterised in that described sleeve top section include with
Three corresponding spacing collars two of three piling bar positions, the outer wall correspondence position welding steel of two neighboring spacing collar two connects
Connect, overall axisymmetricly state, each bottom welding of spacing collar two has ring flange, bolt hole, three are uniformly provided with ring flange
Steel plate welded top between individual spacing collar two has the foundation ring of connecting fan tower.
The isosceles triangle steel pile foundation of described offshore wind farm engineering, it is characterised in that described sleeve bottom section, sleeve mark
Steel pipe on quasi- section is identical with the cross sectional dimensions that upper limit sleeve two is saved at sleeve top, and its inner hollow diameter is more than piling bar
1 ~ 2cm of external diameter；The bolt hole that sleeve bottom section, sleeve standard knot, sleeve top section can be based on ring flange carries out phase with bolt
Mutually fix and be connected.
The isosceles triangle steel pile foundation of described offshore wind farm engineering, it is characterised in that the stop collar on described fixed mount
Cylinder one is identical with the cross sectional dimensions that upper limit sleeve two is saved at sleeve top, and both only length are different.
A kind of construction method of the isosceles triangle steel pile foundation of offshore wind farm engineering, it is characterised in that comprise the following steps：
1）, design and fabrication isosceles triangle steel pile foundation：
According to parameters such as sea water advanced, sea bed geological conditions, fan loads combinations, corresponding piling bar, sleeve bottom section, sleeve are designed
Standard knot, sleeve top section, fixed mount, the specification and size of connecting plate, and weld and make respective members.
2）, squeeze into piling bar：
Three piling bars of isosceles triangle distribution are squeezed into the marine site specified in design, and make the verticality of each piling bar, embedded depth etc. full
Foot is required；
3）, be inserted in fixed mount：
Make fixed mount smooth one is faced up, and three piling bars are entangled based on three spacing collars one on fixed mount, makes fixed mount
Slip into marine along piling bar and contact sea bed；
4）, be inserted in supporting plate：
Piling bar is entangled based on the hole in the middle part of supporting plate, supporting plate is slipped into marine along piling bar and is pressed on fixed mount；
5）, be inserted in an outer sleeve：
According to design, bar shaped bolt hole is based on three sleeve bottom sections assembled end finished product two-by-two with connecting plate and bolt
Font symmetrical structure, similarly three sleeve standard knots assembled end symmetrical structure in a triangle two-by-two, then based on ring flange
Bolt hole bolt each isosceles triangle component is interfixed and is connected, formed sleeve bottom section saved at the top of bottom, sleeve
Top, the stake outer sleeve of the multiple sleeve standard knots of middle connection；Lifting stake outer sleeve, entangles three steel pipes of sleeve accordingly
Three piling bars, make an outer sleeve slip into marine being pressed on supporting plate along piling bar；
6）, connecting fan tower：
Lifting blower fan tower barrel, makes it interfix and be connected with the foundation ring of sleeve top section, and then complete top by bolt
Other installment works of blower fan.
The beneficial effects of the invention are as follows：
1st, the vertical load of top blower fan structure of the present invention is directly passed to seabed soil by stake outer sleeve, and piling bar does not undertake
The vertical load of portion's structure, piling bar and seabed soil shared horizontal loading and moment of flexure etc..Vertical load and lateral load
Separate so that the diameter of piling bar can be greatly reduced with length, and pile body weight is greatly reduced, and then reduces difficulty of construction；
2nd, each component of the invention is bolted to form entirety, and each single construction weight is relatively small, without large-scale lifting with
Transporting equipment, reduces construction cost, and facilitate the construction operation of intertidal belt wind electric engineering；
3rd, the effect of fixed mount of the present invention and supporting plate is that the vertical load of superstructure is transmitted, bigger sea bed area is diffused to
Up, so reduce seabed soil sedimentation；Because both stake outer sleeve and piling bar are separated, even if stake outer sleeve occurs one
The settlement after construction of fixed number value, as long as there is enough estimate and stake outer sleeve has enough length to adapt to sink to needing to settlement after construction
Will, then settlement after construction on piling bar without influence, on the normal operation of blower fan also without influence；
4th, three piling bars of the invention are distributed in isosceles triangle, and the overall bending rigidity after fixed mount and stake outer sleeve are assembled is big,
Larger horizontal loading and moment of flexure can be born, the building ring larger with horizontal fan load under the conditions of the complicated sea situation of adaptation can be met
Border.
Brief description of the drawings：
Fig. 1 sleeve standard knot structural representations of the invention.
Fig. 2 sleeve standard knot cross sectional views of the invention.
Fig. 3 sleeve bottom section structural representations of the invention.
Fig. 4 connecting board structure schematic diagrames of the invention.
Fig. 5 fixed mount top views of the invention.
Fig. 6 fixed mount upward views of the invention.
Fig. 7 section top views in sleeve top of the invention.
Fig. 8 section upward views in sleeve top of the invention.
Triangle connection diagram between Fig. 9 sleeves of the invention.
Figure 10 sleeve bottom sections of the invention and standard knot connection diagram.
Figure 11 sleeve standard knots of the invention save connection diagram with top.
Figure 12 sleeve top sections of the invention and blower fan tower barrel connection diagram.
Figure 13 construction isosceles triangle piling bar schematic diagrames of the invention.
Figure 14 fixed mounts of the invention are inserted in piling bar schematic diagram.
Figure 15 supporting plates of the invention are inserted in piling bar schematic diagram.
Figure 16 sleeves of the invention are inserted in piling bar schematic diagram.
Figure 17 connecting fan tower schematic diagrames of the invention.
Figure 18 steel pile foundation front views of the invention.
There is settlement after construction schematic diagram in the sleeve outside Figure 19 piling bars of the present invention.
Description of reference numerals：1st, sleeve standard knot；2nd, stripe board；3rd, ring flange；4th, bolt hole；5th, bar shaped bolt hole；6、
Sleeve bottom section；7th, disk is extended；8th, connecting plate；9th, fixed mount；10th, spacing collar one；11st, floor；12nd, sleeve top section；13、
Foundation ring；14th, spacing collar two；15th, blower fan tower barrel；16th, piling bar；17th, supporting plate；A, sea level；B, sea bed face；Sunk after C, work
Drop.
Specific embodiment：
Referring to accompanying drawing：
A kind of isosceles triangle steel pile foundation of offshore wind farm engineering, including three piling bars 16 and stake outer sleeve, stake of isosceles triangle distribution
Outer sleeve is mutual with bolt based on connecting plate 8 by a sleeve bottom section 6,1, sleeve top section 12 of multiple sleeve standard knots
It is formed by connecting, the stake outer sleeve of isosceles triangle entangles three piling bars 16 and sinks to seabed and is pressed on supporting plate 17 and fixed mount 9 after assembling, support
Plate 17 is circular steel plate, and circular steel plate endoporus matches with the outer wall of piling bar 16, and blower fan tower barrel 15 is connected on sleeve top section 12,
The gravity of blower fan is directly passed to sea bed based on stake outer sleeve, and the horizontal loading that blower fan is subject to is with moment of flexure by three piling bars 16 and sea
Bed soil body shared, thus constitutes the isosceles triangle steel pile foundation of wind energy project.
Sleeve bottom section 6 is formed by six stripe boards 2 of welding uniform, symmetrical outside steel pipe, overall axisymmetricly state, set
The welded top of cylinder bottom section 6 has ring flange 3, and bolt hole 4 is uniformly provided with ring flange 3, and the bottom welding of sleeve bottom section 6 has
Extension disk 7, the middle part of any two adjacent bar plate 2 is stayed and sets a pair of bar shaped bolts hole 5, as shown in Figure 3.On sleeve bottom section 6
Extension disk 7 upper load can be diffused to bigger area up, therefore extension disk 7 area it is larger.
Sleeve standard knot 1 is formed by six stripe boards 2 of welding uniform, symmetrical outside steel pipe, overall axisymmetricly state, set
The two ends of cylinder standard knot 1 are welded with ring flange 3, bolt hole 4 are uniformly provided with ring flange 3, in any two adjacent bar plate 2
Portion stays and sets a pair of bar shaped bolts hole 5, as shown in Figures 1 and 2：The overall axisymmetricly state of sleeve standard knot 1, also in symmetrical above and below
State, the non-directional difference of ring flange 3 of both sides.
Sleeve bottom section 6 is symmetric with six stripe boards 2 on sleeve standard knot 1, i.e., two neighboring stripe board 2 it
Between angle be 60o.Sleeve bottom section 6 is Fig. 2 with the cross sectional view of sleeve standard knot 1；Sleeve bottom section 6 and sleeve
Standard knot 1 is differed only in：One end of sleeve bottom section 6 is extension disk 7, rather than ring flange 3.
Sleeve bottom section 6 and two stripe boards 2 optionally adjacent in six stripe boards 2 on sleeve standard knot 1, in the middle
A pair of bar shaped bolts hole 5 are opened up, is used for installing connecting plate 8；Connecting plate 8 is a bar steel plate, and its two ends is provided with otic placode, otic placode
On open up a pair of bar shaped bolts hole 5；The bar shaped of bar shaped bolt hole 5 and connecting plate 8 on sleeve bottom section 6 and sleeve standard knot 1
Bolt hole 5 is identical, and both realize interfixing and being connected by bolt.I.e. three sleeve bottom sections 6 or three sleeve marks
Quasi- section 1 can form delta structure by the mutually assembling of connecting plate 8, as shown in Figures 9 and 10.
Sleeve top section 12 is by welded truss shape bar shaped uniform, symmetrical on three spacing collars 2 14 of isosceles triangles distribution
Steel plate is formed, overall axisymmetricly state, and the bottom welding of sleeve top section 12 has ring flange 3, and spiral shell is uniformly provided with ring flange 3
Keyhole 4, the welded top of sleeve top section 12 has foundation ring 13, is used for connecting fan tower 15, as illustrated in figs. 7 and 8.
The cross section chi of steel pipe and sleeve the top 12 upper limit sleeves 2 14 of section on sleeve bottom section 6, sleeve standard knot 1
It is very little identical, external diameter 1 ~ 2cm of its inner hollow diameter more than piling bar 16.The bolt hole 4 that each sleeve can be based on ring flange 3 uses spiral shell
Bolt is interfixed and is connected, as shown in Fig. 9 ~ Figure 11.
The length that sleeve bottom section 6, sleeve standard knot 1, sleeve top save 12 threes can be with identical, it is also possible to differs,
The length of three can be designed according to the reasonable weight of component, the length available rule modulus of each component.Usual blower fan engineering
Middle to carry out continued access according to the multiple sleeve standard knots 1 of sea water advanced needs, it can be standardized, making of standardizing.Each sleeve steel
The internal diameter of pipe, more than the 1 ~ 2cm of external diameter of piling bar 16, is in order that stake outer sleeve can be enclosed within piling bar 16 smoothly slips into sea bed.
In order to reduce phase mutual friction, it might even be possible to smear lubricant on the inwall of stake outer sleeve and the outer wall of piling bar 16.
Uniform, symmetrical welding steel is formed on the spacing collar 1 that fixed mount 9 is distributed by three isosceles triangles, stop collar
Cylinder one 10 is connected based on floor 11 with steel plate bottom welding, the top of fixed mount 9 be in it is plane, as shown in figs. 5 and 6.It is fixed
Spacing collar 1 on frame 9 is identical with the cross sectional dimensions of sleeve top 12 upper limit sleeves 2 14 of section, and both are only long
Degree is differed.
The complete phase of centre-to-centre spacing between centre-to-centre spacing and three piling bars 16 on fixed mount 9 between three spacing collars 1
Together, as long as therefore three piling bars 16 construction registrations, fixed mount 9 can entangle three piling bars 16 and slip into sea bed.Certainly, three sleeves
Bottom section 6 or three sleeve standard knots 1 by connecting plate 8 assembling form delta structure after, on each sleeve between steel pipe in
The heart is away from also identical with the centre-to-centre spacing between three piling bars 16, therefore stake outer sleeve can entangle three piling bars 16 and slip into sea bed.
After fixed mount 9 is inserted in three piling bars 16 with stake outer sleeve, entirety is mutually formed, bending rigidity is big, resistance to capsizing
By force, larger horizontal loading and moment of flexure can be resisted, the stressing conditions of offshore wind turbine under the conditions of complicated sea situation can be undertaken.
The effect of supporting plate 17 is in the transmission of the vertical load of top blower fan, diffusing to bigger seabed soil.It is fixed
After frame 9 entangles piling bar 16 based on spacing collar 1, the top surface of fixed mount 9 is the level of state, therefore is pressed in the supporting plate on fixed mount 9
17 are also the level of state, and fixed mount 9 can only occur downward Vertical Settlement with supporting plate 17 along piling bar 16.Fixed mount 9 and three
The seabed soil in the range of contour area that individual supporting plate 17 is occupied jointly is by the direct effect of top vertical load.
The size of corresponding supporting plate 17 can be designed according to Load Combination and sea bed geological conditions.When the size of supporting plate 17 is sufficiently large
When, blower fan vertical uniform load q makes what sea bed produced to be deposited in tolerance interval on supporting plate 17 and fixed mount 9, by design
The length of corresponding stake outer sleeve meets it, adapts to sedimentation needs, i.e., after there is enough settlement after construction in stake outer sleeve, its basis
Highly remain to meet the normal operation needs of blower fan, as shown in figure 19.
Certainly, when designing supporting plate 17, it should be ensured that three supporting plates 17 cannot overlap each other, conflict.In order to need, also can be support
Plate 17 is designed to irregular shape, does not overlap with each other it, and with sufficiently large area.
Piling bar 16 has the effect of positioning, horizontal restraint to fixed mount 9 and supporting plate 17, it is ensured that stake outer sleeve is in vertical shape
State, so as to safeguard the normal attitude of top blower fan.Therefore piling bar 16 should have enough intensity and rigidity, can maintain the lead of stake outer sleeve
Vertical characteristic.
Sleeve bottom section 6, sleeve standard knot 1, sleeve top section 12, fixed mount 9 are formed by welded steel, each component,
Weld seam and integrally-built intensity should meet the effect demand of combined load under complex working condition without surrendering, and each component should expire
The excessive deformation that sufficient stress concentration is needed without occurring to be allowed more than specification.
A kind of construction method of the isosceles triangle steel pile foundation of offshore wind farm engineering, is described in detail as follows：
1）, design and fabrication isosceles triangle steel pile foundation：
The parameter such as combine according to sea water advanced, sea bed geological conditions, fan loads, design corresponding piling bar 16, sleeve bottom section 6,
Sleeve standard knot 1, sleeve top section 12, fixed mount 9, the specification and size of connecting plate 8, and weld and make respective members.
The need for the diameter of designed supporting plate 17 should meet stress spread, the length of stake outer sleeve should be able to adapt to settlement after construction
The need for, piling bar 16 should be able to resist horizontal loading with moment of flexure without sidesway occurring and inclining, and the intensity of each component should be able to bear multiple
Under general labourer's condition combined load effect and without flexing and deformation.
2）, squeeze into piling bar 16：
Three piling bars 16 of isosceles triangle distribution are squeezed into the marine site specified in design, and make the verticality of each piling bar, embedded depth etc.
Meet and require, as shown in figure 13.
Although piling bar 16 does not undertake vertical load, the stability of stake outer sleeve is maintained by it, and the attitude of piling bar 16 is determined
The attitude of top blower fan.Therefore piling bar 16 should have enough embedded depths, intensity and rigidity, it is remained under Load Combination effect
Keep vertical state.
3）, be inserted in fixed mount 9：
Make fixed mount 9 smooth one is faced up, and three piling bars 16 are entangled based on three spacing collars 1 on fixed mount 9, is made
Fixed mount 9 is slipped into marine and contacts sea bed along piling bar 16, as shown in figure 14.
Because piling bar 16 is to the positioning and restriction effect of fixed mount 9 so that fixed mount 9 is horizontal with sea bed face to be contacted,
It will further be in close contact with seabed soil in the presence of follow-up stake outer sleeve vertical load.Fixed mount 9 can only be along steel
There is Vertical Settlement in stake 16.
4）, be inserted in supporting plate 17：
Hole based on the middle part of supporting plate 17 entangles piling bar 16, supporting plate 17 is slipped into marine along piling bar 16 and is pressed on fixed mount 9,
As shown in figure 15.
5）, be inserted in an outer sleeve：
According to design, bar shaped bolt hole 5 is based on three sleeve bottom sections 6 assembled end two-by-two with connecting plate 8 and bolt
Symmetrical structure in a triangle, similarly three sleeve standard knots 1 assembled end symmetrical structure in a triangle two-by-two, then based on flange
Bolt hole 4 on disk 3 interfixes each isosceles triangle component and be connected with bolt, forms sleeve bottom section 6 on bottom, sleeve top
Portion's section 12 is in top, the stake outer sleeve of the multiple sleeve standard knots 1 of middle connection.Lifting stake outer sleeve, three steel pipes of sleeve
Entangle corresponding three piling bars 16, make an outer sleeve along piling bar 16 slip into it is marine be pressed on supporting plate 17, as shown in figure 16.
In work progress, the assembling of each component can be flexibly carried out according to the parameter of lifting appliance.Can be multiple sleeves in ship
On be connected with after the segmentation sleeve lifting that is formed be inserted in piling bar 16, then the assembling between multiple segmentation sleeves is realized in water
Be connected.
Due to stake outer sleeve pipe diameter slightly larger than piling bar 16 external diameter, therefore stake outer sleeve in the presence of deadweight along
Piling bar 16 is finally pressed on supporting plate 17 and fixed mount 9 in the sinking of vertical state.
6）, connecting fan tower 15：
Lifting blower fan tower barrel 15, makes it interfix and be connected with the foundation ring 13 of sleeve top section 12 by bolt, and then complete
Into other installment works of top blower fan, as shown in figure 17.
Under blower fan Action of Gravity Field, there is Vertical Settlement in stake outer sleeve, along piling bar 16 as long as the length foot of stake outer sleeve
It is enough big, the need for meeting, adapting to seabed soil settlement after construction, can just maintain enough height of blower fan tower barrel, it is ensured that blower fan
Normal operation.
The new steel pile foundation of offshore wind farm engineering that the present invention is carried, the vertical load of top blower fan structure passes through stake overcoat
Cylinder is directly passed to seabed soil, and piling bar does not undertake the vertical load of superstructure, and three isosceles triangle piling bars are total to seabed soil
With horizontal loading and moment of flexure etc. is undertaken, larger horizontal loading and moment of flexure can be born, can meet with the conditions of adaptation complexity sea situation
The larger working environment of horizontal fan load.The separation of vertical load and lateral load so that the diameter of piling bar can be big with length
Big to reduce, pile body weight is greatly reduced, and then reduces difficulty of construction.Each component is bolted to form entirety, each single
Construction weight is relatively small, without large-scale lifting and transporting equipment, reduces construction cost, particularly facilitates and enters sector-style in intertidal zone
Electrical engineering construction operation.As long as being designed to work as, the settlement after construction of stake outer sleeve is on piling bar without influence, the normal operation to blower fan
Without influence.
The present invention is not limited to above-mentioned specific embodiment, according to the above, according to the ordinary technical knowledge of this area
And customary means, under the premise of above-mentioned basic fundamental thought of the invention is not departed from, the present invention can also make other diversified forms
Equivalent modifications, replace or change, be within the scope of the present invention.
Claims (9)
1. a kind of isosceles triangle steel pile foundation of offshore wind farm engineering, it is characterised in that including three squeeze into specified marine site, in product
The piling bar of font distribution, is inserted in fixed mount and sinks to seabed on three piling bars, is inserted in supporting plate, stake overcoat on every piling bar successively
Cylinder, supporting plate sink to it is marine be pressed on fixed mount, stake outer sleeve is by a sleeve bottom section, multiple sleeve standard knot, a sleeve
Top section is sequentially connected composition, and the sleeve bottom section of stake outer sleeve is pressed on supporting plate, and the sleeve top section upper end of stake outer sleeve connects
It is connected to blower fan tower barrel.
2. the isosceles triangle steel pile foundation of offshore wind farm engineering according to claim 1, it is characterised in that described fixed mount
Including being distributed on steel plate three spacing collars one corresponding with three piling bar positions, the upper surface of spacing collar one and triangle
Steel plate upper surface is concordant, and floor is provided between the outer wall of two neighboring spacing collar one and steel plate lower surface.
3. the isosceles triangle steel pile foundation of offshore wind farm engineering according to claim 1, it is characterised in that described sleeve bottom
Portion's section is made up of six stripe boards of welding uniform, symmetrical outside steel pipe, and overall axisymmetricly state, steel pipe top is welded with flange
Disk, is uniformly provided with bolt hole on ring flange, steel pipe bottom is welded with extension disk, the corresponding position in any two adjacent bar plate middle part
Put to stay and set a pair of bar shaped bolts hole.
4. the isosceles triangle steel pile foundation of offshore wind farm engineering according to claim 1, it is characterised in that described sleeve mark
Quasi- section is made up of six stripe boards of welding uniform, symmetrical outside steel pipe, overall axisymmetricly state, the two ends weldering of sleeve standard knot
Ring flange is connected to, bolt hole is uniformly provided with ring flange, any two adjacent bar plate middle part opposite position is stayed and sets a pair
Shape bolt hole.
5. the isosceles triangle steel pile foundation of the offshore wind farm engineering according to claim 3 or 4, it is characterised in that described three
Connected at the first-class height of root piling bar between adjacent sleeve bottom section outer wall stripe board, between adjacent sleeve standard knot outer wall stripe board
There is connecting plate.
6. the isosceles triangle steel pile foundation of offshore wind farm engineering according to claim 1, it is characterised in that described sleeve top
Portion's section includes three spacing collars two corresponding with three piling bar positions, the weldering of the outer wall correspondence position of two neighboring spacing collar two
Steel plate connection is connect, overall axisymmetricly state, each bottom welding of spacing collar two has ring flange, spiral shell is uniformly provided with ring flange
Keyhole, the steel plate welded top between three spacing collars two has the foundation ring of connecting fan tower.
7. the isosceles triangle steel pile foundation of offshore wind farm engineering according to claim 1, it is characterised in that described sleeve bottom
Steel pipe on portion's section, sleeve standard knot is identical with the cross sectional dimensions that upper limit sleeve two is saved at sleeve top, and its is hollow interior
External diameter 1 ~ 2cm of the footpath more than piling bar；Sleeve bottom section, sleeve standard knot, sleeve top section can be based on the bolt hole on ring flange
Interfixed with bolt and be connected.
8. the isosceles triangle steel pile foundation of offshore wind farm engineering according to claim 1, it is characterised in that described fixed mount
On spacing collar one and sleeve top section upper limit sleeve two cross sectional dimensions it is identical, both only length are different.
9. a kind of construction method of the isosceles triangle steel pile foundation of offshore wind farm engineering, it is characterised in that comprise the following steps：
1）, design and fabrication isosceles triangle steel pile foundation：
According to parameters such as sea water advanced, sea bed geological conditions, fan loads combinations, corresponding piling bar, sleeve bottom section, sleeve are designed
Standard knot, sleeve top section, fixed mount, the specification and size of connecting plate, and weld and make respective members；
2）, squeeze into piling bar：
Three piling bars of isosceles triangle distribution are squeezed into the marine site specified in design, and make the verticality of each piling bar, embedded depth etc. full
Foot is required；
3）, be inserted in fixed mount：
Make fixed mount smooth one is faced up, and three piling bars are entangled based on three spacing collars one on fixed mount, makes fixed mount
Slip into marine along piling bar and contact sea bed；
4）, be inserted in supporting plate：
Piling bar is entangled based on the hole in the middle part of supporting plate, supporting plate is slipped into marine along piling bar and is pressed on fixed mount；
5）, be inserted in an outer sleeve：
According to design, bar shaped bolt hole is based on three sleeve bottom sections assembled end finished product two-by-two with connecting plate and bolt
Font symmetrical structure, similarly three sleeve standard knots assembled end symmetrical structure in a triangle two-by-two, then based on ring flange
Bolt hole bolt each isosceles triangle component is interfixed and is connected, formed sleeve bottom section saved at the top of bottom, sleeve
Top, the stake outer sleeve of the multiple sleeve standard knots of middle connection；Lifting stake outer sleeve, entangles three steel pipes of sleeve accordingly
Three piling bars, make an outer sleeve slip into marine being pressed on supporting plate along piling bar；
6）, connecting fan tower：
Lifting blower fan tower barrel, makes it interfix and be connected with the foundation ring of sleeve top section, and then complete top by bolt
Other installment works of blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710258121.XA CN106930314A (en) | 2017-04-19 | 2017-04-19 | The isosceles triangle steel pile foundation and its construction method of a kind of offshore wind farm engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710258121.XA CN106930314A (en) | 2017-04-19 | 2017-04-19 | The isosceles triangle steel pile foundation and its construction method of a kind of offshore wind farm engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106930314A true CN106930314A (en) | 2017-07-07 |
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ID=59437719
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710258121.XA Withdrawn CN106930314A (en) | 2017-04-19 | 2017-04-19 | The isosceles triangle steel pile foundation and its construction method of a kind of offshore wind farm engineering |
Country Status (1)
| Country | Link |
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| CN (1) | CN106930314A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625388A (en) * | 2018-05-28 | 2018-10-09 | 中国电建集团华东勘测设计研究院有限公司 | A kind of sleeve combination formula large diameter single pile foundation and its construction method suitable for Shallow Bedrock geological conditions |
-
2017
- 2017-04-19 CN CN201710258121.XA patent/CN106930314A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625388A (en) * | 2018-05-28 | 2018-10-09 | 中国电建集团华东勘测设计研究院有限公司 | A kind of sleeve combination formula large diameter single pile foundation and its construction method suitable for Shallow Bedrock geological conditions |
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Application publication date: 20170707 |
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