CN107542101A - A kind of four floating drum buoyancy tank combined type foundation structures of sea and its construction method - Google Patents
A kind of four floating drum buoyancy tank combined type foundation structures of sea and its construction method Download PDFInfo
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- CN107542101A CN107542101A CN201710895702.4A CN201710895702A CN107542101A CN 107542101 A CN107542101 A CN 107542101A CN 201710895702 A CN201710895702 A CN 201710895702A CN 107542101 A CN107542101 A CN 107542101A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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Abstract
The invention belongs to the infrastructure technologies field of ocean engineering, disclose a kind of marine four floating drum buoyancy tank combined type foundation structures and its construction method, its foundation structure is sequentially connected according to its central point in the horizontal plane including four surrounds the floating drum that square is arranged, a buoyancy tank is connected between each two floating drum, the center line of buoyancy tank along its length passes through the axis of its both ends floating drum；Floating drum and buoyancy tank top are connected with changeover portion pylon, and changeover portion pylon is used to connect top wind power equipment；The step of its construction method enters water, suction penetration, grouting ballast, installation superstructure, recycling including precast construction, initial adjustment preparation, delivery waterborne, basis.The present invention has the characteristics of gravity type foundation and suction bucket foundation concurrently, and while bearing power increase, transport mounting means is easy, and recyclable recycling, construction cost substantially reduces.
Description
Technical field
The invention belongs to the infrastructure technologies field of ocean engineering, is to be related to one kind to be applied to sea turn specifically
Electric and sea survey wind facility foundation structure and its construction method, realize what overall package, transport controlled, and sank to installing, reclaiming
Institutional operation.
Background technology
The development of offshore wind farm industry has driven a series of construction of wind power plants.Guide's work as offshore wind farm engineering
Journey, offshore wind measuring tower structure are a kind of tall and slender structure buildings, and the foundation pattern used mostly at present is steel pipe pile foundation.It is this
The complicated construction technique of foundation pattern, transport installation need large-scale equipment to be transported, lifted, thus long in time limit, and construction cost
With higher；The piling positioning of steel-pipe pile and torsional angle etc. are difficult to accurately hold, and pile sinking efficiency comparison is low.Residing for the anemometer tower structure of top
Marine environment generally include wave, stream and main wind load.Upper load be delivered to bottom can be formed it is larger curved
, it is necessary to while designing a kind of new foundation structure pattern and meet requirement for bearing capacity, construction cost can reduce square.Traditional
Foundation pattern has gravity type foundation, overall to rely on dead load and thereon the weight resistance external load of filler and ballast, maintains
Structural stability, Construction Principle is concise, and filler and ballast material cost are low, but all very big for basis deadweight and physical dimension,
The scope that basis occupies sea bed is wider, and for the deepwater field also required to seabed conditions, construction, means of transportation and cost are equal
It is restricted.More new cylinder-shaped foundation structure form is simple, and applicable seabed conditions are extensive, while sheath skirt resistant slide is stable
Property it is higher, construction and installation principle is concise, but sinking watching has the problem of not in place and leveling control is difficult, simultaneously
The problems such as flexing occurs for the steel constructions such as skirtboard under working condition be present, equally govern the development of bucket foundation.The above is asked
Inscribe and equally existed in wind-driven generator at sea, the increase of blower fan single-machine capacity and the diversity of deepwater field sea bed geological conditions
New challenge is proposed to the foundation structure pattern of offshore wind power equipment.
The content of the invention
Use that gravity type foundation cost is low, bearing capacity is strong and the basic convenient transportation of suction tube, wide adaptability etc. to integrate
The characteristics of aspect, while in order to avoid single structure pattern gene basis oversized caused construction technology and construction cost
The burden of aspect, the invention provides a kind of marine four floating drums-buoyancy tank combined type foundation structure and its construction method, have gravity concurrently
Formula basis and the characteristics of suction bucket foundation, while bearing power increase, transport mounting means is easy, recyclable recycling, applies
Work cost substantially reduces.
In order to solve the above-mentioned technical problem, the present invention is achieved by following technical scheme：
A kind of sea four floating drums-buoyancy tank combined type foundation structure, including four identical floating drums, four identical buoyancy tanks and
One changeover portion pylon；Four floating drums are sequentially connected according to its central point in the horizontal plane to be surrounded square and is arranged,
Connected per the two neighboring floating drum by a buoyancy tank, the center line of the buoyancy tank along its length is through described in its both ends
The axis of floating drum；The floating drum connects changeover portion pylon with the buoyancy tank top, and the changeover portion pylon is used to connect top wind
Electric equipment；
The floating drum is made up of floating drum top cover, barrel, sheath skirt, radial rib plate, ring floor, subdivision plate；The floating drum top
Covering portion edge sets the barrel, lower edges to set the sheath skirt；The floating drum top cover forms described floating with the barrel
The superstructure of cylinder, the superstructure of the floating drum is interior to set the radial rib plate and the ring floor；The floating drum top cover
The substructure of the floating drum is formed with the sheath skirt, skirtboard in annular is provided with the substructure of the floating drum；
The buoyancy tank is made up of buoyancy tank top plate, buoyancy tank bottom plate, side plate, floor, anti-skid skirtboard, the buoyancy tank top plate, described
Buoyancy tank bottom plate, the side plate form the casing of cuboid cavity structure, and the box house of the buoyancy tank is provided with horizontal and vertical
Polylith floor, the casing of the buoyancy tank is divided into interconnected region by floor described in polylith；The buoyancy tank top plate both ends are pre-
Provided with stomata, the buoyancy tank bottom plate both ends are preset with water hole, and institute is realized by gas-liquid displacement using the stomata and the water hole
State water-filling and the draining of the box house of buoyancy tank；The buoyancy tank bottom plate lower edges set the anti-skid skirtboard；
The changeover portion pylon is made up of four identical columns, some support bars, eight braces；Four column bottoms
End pours into the floating drum top cap central of four floating drums and welded together with it respectively, and from the bottom to top with identical angle
It is centroclinal to foundation structure；The more support bars form truss type steel structure between being connected to four columns；It is described
Brace is connected between the column buoyancy tank adjacent thereto, and the brace lower end is passed through institute by the buoyancy tank roof center
State inside buoyancy tank, the brace is internally provided with the air-liquid pipeline extended to below buoyancy tank bottom plate and grout lines；Described in every
Air-liquid pipeline, grout lines and liquid level sensor are respectively arranged with inside column, wherein air-liquid pipeline is prolonged by the column
Extend below the floating drum top cover of the floating drum, wherein grout lines are extended to superstructure and the institute of the floating drum by the column
State the box house of buoyancy tank, wherein liquid level sensor is used for during towage by observing inside the column liquid after fluid-tight
The liquid level change of body, judges the atmospheric pressure state in the floating drum corresponding to the column bottom.
Preferably, the barrel of the floating drum highly 1/3rd arrives half for the floating drum cap diameter,
The sheath skirt height and the ratio of height to diameter of the floating drum cap diameter of the floating drum are 0.8-1.5；The annular of the floating drum
2nd/to three/3rds of a diameter of floating drum cap diameter of interior skirtboard, the height of skirtboard is described in the annular
2nd/to three/3rds of sheath skirt height.
Preferably, the barrel of the side plate of the buoyancy tank and the floating drum is highly consistent, the anti-skid skirtboard of the buoyancy tank
Height 1/3rd arrive half for the side plate height.
Preferably, it is provided with the range of the middle part of the sheath skirt to bottom and cuts native ring, it is described to cut native ring and be arranged in cylinder
The interior surface of revolution and/or the outer surface of revolution of skirt, the section outline for cutting native ring can be angular or arc.
A kind of construction method of above-mentioned marine four floating drums-buoyancy tank combined type foundation structure, is carried out in accordance with the following steps：
(1) land based plant is prefabricated processes all parts, and the floating drum, the buoyancy tank, the changeover portion pylon are pacified
Dress up four floating drum buoyancy tank foundation structure on integral combined type sea；
(2) four floating drum buoyancy tank foundation structures on combined type sea are lifted into sea, are sunk to, passed through using foundation structure deadweight
Increase buoyancy to being inflated in the sheath skirt of the floating drum, and the draft needed according to towage is adjusted, it is last described vertical
Water filling fluid-tight in post；
(3) transportation by driving towage is carried out to four floating drum buoyancy tank foundation structures on combined type sea；
(4) sink to installing after four floating drum buoyancy tank foundation structures are consigned to specified location on combined type sea, described floating drum
Substructure pump-down process makes foundation structure sink to reduce buoyancy, while water-filling makes foundation structure certainly in the casing of the buoyancy tank
Increase again, foundation structure is further sunk, until the anti-skid skirtboard of the sheath skirt of the floating drum and buoyancy tank contact sea bed；
(5) after the sheath skirt of the floating drum and the anti-skid skirtboard insertion ground of the buoyancy tank, to the bottom of the floating drum
Structure is drawn water, and foundation structure is further sunk until the floating drum top cover and the buoyancy tank bottom plate completely attach to mud face, continuation
The substructure of the floating drum is persistently drawn water, to carry out negative pressure consolidation process to the soil body；
(6) after the completion of negative pressure is reinforced, the box house grouting treatment using grout lines to buoyancy tank, the top of floating drum is tied
Structure carries out jackstone ballast or grouting ballast；
(7) after the completion of grouting treatment, top wind power equipment is lifted, carries out installation waterborne, construction is completed.
Wherein, the draft needed according to towage described in step (2) is adjusted, especially by the adjustment buoyancy tank
Box house ballast water capacity or the floating drum substructure displacement carry out.
Wherein, the transportation by driving towage described in step (3) is navigated using single-point or two point supports, and to being except arrangement before support is navigated
Water-filling ballast is carried out inside the other three or two floating drums beyond the floating drum of cable point, there is foundation structure and be used for
Neutralize the hypsokinesis angle buried and appear elephant for the first time.
Wherein, during step (3) described towage, set by the level detection of the column after internal water flooding and its inside
It is standby, the situation of change of each column internal liquid level is observed, whether preliminary judgement basis structure keeps poised state, is balanced if any deviateing
The inclination of position carries out leveling.
Wherein, in the suction penetration process described in step (5), taken out by the substructure increase of the floating drum in updip
Water speed rate and/or the floating drum having a down dip substructure inflation or water-filling, carry out Levelling operation.
Wherein, lifting top wind power equipment is removed during recycling first, secondly by the gas-liquid pipe inside the vertical rod
Sheath skirt internal water flooding or inflation increase internal pressure of the road to the floating drum, and pass through the air-liquid pipeline pair inside the brace
Water filling or inflation increase internal pressure are carried out inside the anti-skid skirtboard of the buoyancy tank so that the sheath skirt of the floating drum and the buoyancy tank
Anti-skid skirtboard separated with foundation, after whole foundation structure is slowly floated up on sea, towed back to by towboat land.
The beneficial effects of the invention are as follows：
Marine four floating drums-buoyancy tank combined type foundation structure of the present invention, by four floating drums, four buoyancy tanks and changeover portion tower
Frame combines；Floating drum superstructure as ballast compartment, substructure as suction bucket foundation, have concurrently gravity-type structure and
The characteristics of suction cylinder-shaped foundation structure, while the form of four pontoon combinations causes the diameter of each floating drum relative to identical scale
The geometry size of bucket foundation or gravity type foundation greatly reduces；Buoyancy tank is as connector by four independent floating drum groups
Integrator structure, its upper box body load-bearing, the anti-skid skirtboard increase structure stability against slope in bottom, and sink to completing upper back
Grouting is integrally formed the pedestal of structure in casing；Therefore the characteristics of buoyancy tank also has gravity-type structure and suction apron board structure concurrently；It is floating
Case and pontoon combination structure cause the interaction between floating drum to strengthen, while the supporting role of the anti-skid skirtboard in buoyancy tank bottom improves
The lateral rigidity of floating drum sheath skirt, prevent that flexing phenomenon occurs for sheath skirt in sinking watching；Changeover portion pylon structure is except as upper
Outside the attachment structure of portion's wind power equipment, its major function is to be internally provided with pipe-line system, it is possible to achieve in transportation
Cement-grouting consolidation operation after detection, leveling and installation.After the wind power equipment installation of top, changeover portion pylon structure
Superstructure load is uniformly distributed on four floating drums and four buoyancy tanks by strong point effect, gives full play to combined type basis knot
The bearing capacity of all parts in structure.
The marine four floating drums-buoyancy tank combined type foundation structure and its construction method of the present invention so that the waterline of single floating drum
Face area is smaller, and towage process easily accurately controls leveling, and the collaboration added in combination with floating box structure between four floating drums is made
With increasing the contact area of the bottom of foundation and sea bed, the increase of end bearing power, furthermore buoyancy tank is as top changeover portion pylon
Supporting construction, optimize the force transfer system of structure so that basic each several part stress is more uniformly distributed.Due to floating drum top and buoyancy tank case
Internal portion finally needs ballast grouting treatment, increases the deadweight of foundation structure, improves stability against overturning, total bearing capacity performance
Lifting, therefore the lower skirtboard of floating drum and buoyancy tank height can substantially reduce, and save material cost, while basic submergence depth subtracts
Small, the probability of run-off the straight in sinking watching reduces, and sinking Levelling operation is greatly simplified, and integral construction measure is optimized.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of marine four floating drums provided by the present invention-buoyancy tank combined type foundation structure；
Fig. 2 is the vertical view visual angle schematic diagram of marine four floating drums provided by the present invention-buoyancy tank combined type foundation structure；
Fig. 3 is that marine four floating drums provided by the present invention-buoyancy tank combined type foundation structure looks up visual angle schematic diagram；
Fig. 4 is the spar structures schematic diagram of marine four floating drums provided by the present invention-buoyancy tank combined type foundation structure；
Fig. 5 is the floating box structure schematic diagram of marine four floating drums provided by the present invention-buoyancy tank combined type foundation structure；
Fig. 6 is the changeover portion pylon structure signal of marine four floating drums provided by the present invention-buoyancy tank combined type foundation structure
Figure.
In figure：1st, floating drum, 11, floating drum top cover, 12, barrel, 13, sheath skirt, 14, radial rib plate, 15, ring floor, 16, ring
Skirtboard in shape, 17, cut native ring；2nd, buoyancy tank, 21, buoyancy tank top plate, 22, buoyancy tank bottom plate, 23, side plate, 24, floor, 25, anti-skid skirt
Plate；3rd, changeover portion pylon, 31, column, 32, support bar, 33, brace.
Embodiment
For the content of the invention, feature and the effect of the present invention can be further appreciated that, following examples are hereby enumerated, and coordinate accompanying drawing
Describe in detail as follows：
As shown in Figure 1 to Figure 3, present embodiment discloses a kind of marine four floating drums-buoyancy tank combined type foundation structure, main bag
Include four 1, four, identical floating drum changeover portion pylons 3 of identical buoyancy tank 2, one.
Four floating drums 1 are sequentially connected according to its central point and can surround square and be arranged in the horizontal plane.
As shown in figure 4, each floating drum 1 by floating drum top cover 11, barrel 12, sheath skirt 13, radial rib plate 14, ring floor 15,
Skirtboard 16 in annular, cut native ring 17 and form.The circular upper edge of floating drum top cover 11 edge is provided with the barrel 12 of annular, lower edges
It is provided with the sheath skirt 13 of annular；The height of barrel 12 is smaller, and generally 1/3rd of the diameter of floating drum top cover 11 arrive half；
The height of sheath skirt 13 and the diameter dimension of floating drum top cover 11 approach, and ratio (ratio of height to diameter) is about 0.8-1.5.Floating drum top cover 11 and cylinder
The superstructure of floating drum 1 that wall 12 is formed has the characteristics of gravity bucket foundation, can be as the ballasted area after installation.It is floating
Uniform radial rib plate 14 and uniform ring floor 15 are provided with 1 superstructure of cylinder, primarily to preventing barrel 12 from existing
Deformed after ballast.Skirtboard 16 in highly less annular is provided with the substructure of floating drum 1, plays anti-skid part and floor
Effect；The diameter of skirtboard 16 skirtboard 16 typically in 2nd/1 to three/3rds of the diameter of floating drum top cover 11, annular in annular
Height typically in the range of 2nd/1 to three/3rds of the height of sheath skirt 13.The floating drum that floating drum top cover 11 is formed with sheath skirt 13
1 substructure has the characteristics of wide shallow formula suction bucket foundation, and being on the one hand used for during floating drag the substructure of floating drum 1 can be with
Inflation, cavity is formed to increase foundation structure buoyancy and realize the control leveling during towage；On the other hand sinking to pacifying
The substructure of floating drum 1 is vented during dress and reduces buoyancy, to ensure that its normally sinks, skirtboard in bottom sheath skirt 13 and annular
16 are finally inserted into inside ground, not only basis is brought into close contact by way of taking out negative pressure, while being capable of consolidated subsoil base
Plinth, while ensureing that structure has stability against overturning, stability against slope of also having exhibited standard.The middle part of sheath skirt 13 bottom of to
The section arbitrary height at end, which is provided with, cuts native ring 17, and the interior surface of revolution of sheath skirt 13 or the outer surface of revolution can be arranged in by cutting native ring 17,
Or the inside and outside surface of revolution is arranged simultaneously, its section outline can be angular or arc.The main function for cutting native ring 17 is to reduce
The side friction of sheath skirt in sinking watching, ensure that foundation structure sinks to design requirement depth.
Four floating drums 1 are connected with each other by four buoyancy tanks 2, and a buoyancy tank 2 is connected between every two neighboring floating drum 1.Buoyancy tank 2
Both ends are welded on floating drum 1 so that four buoyancy tanks 2 and four floating drums 1 form an entirety, buoyancy tank 2 along its length in
Heart line passes through the axis of its both ends floating drum 1, superstructure load is evenly transferred to each floating drum 1 of foundation structure and is floated
On case 2.
As shown in figure 5, buoyancy tank 2 is made up of buoyancy tank top plate 21, buoyancy tank bottom plate 22, side plate 23, floor 24, anti-skid skirtboard 25.
Buoyancy tank top plate 21, buoyancy tank bottom plate 22, side plate 23 form the casing of cuboid cavity structure, the height (i.e. the height of side plate 23) of casing
With the superstructure of floating drum 1 (i.e. the height of barrel 12) unanimously, i.e., the superstructure of floating drum 1, the tank floor of buoyancy tank 1 flush, and ensure
It is heavy pass through after the completion of basis be bonded completely with sea bed face.The box house of buoyancy tank 2 is provided with horizontal and vertical polylith floor 24, polylith
Floor 24 will be divided into interconnected multiple regions inside buoyancy tank 2, the effect of floor 24 is to strengthen the inside rigidity of buoyancy tank 2, is prevented
Bending deformation occurs for the side plate 23 of steel construction after grouting.The both ends of buoyancy tank top plate 21 are preset with the stomata of Valve controlling, for gas
Inflate or be vented when water is replaced；The both ends of buoyancy tank bottom plate 22 are preset with the water hole of Valve controlling, for adjusting filled water amount in buoyancy tank.
Stomata and water hole can be set it is multiple standby, to prevent indivedual blockage phenomenons.Stomata is connected with independent pipe-line system, and
Water hole is not provided with pipeline, and box house water-filling, the draining for realizing buoyancy tank 2 can be replaced by gas-liquid.The lower edges of buoyancy tank bottom plate 22
Anti-skid skirtboard 25 is provided with, 1/3rd of the height substantially height of side plate 23 of anti-skid skirtboard 25 arrives half.Buoyancy tank 2
Casing can be increased during towage with water-filling conducts oneself with dignity, and by adjusting different drafts, reaches wanting for towage stability
Ask；When sinking to installing, complete water filling, ensure fall rate, basis is heavy pass through after the completion of, the box house of buoyancy tank 2 passes through transition
The characteristics of grout lines of section pylon 3 carry out cement-grouting consolidation, and increase dead load makes it have gravity type foundation structure.Buoyancy tank 2
The anti-skid skirtboard 25 that lower periphery one encloses mainly provides resistant slide, antidumping bearing capacity, while the area of buoyancy tank bottom plate 22 is larger, can
As main sole plate structure.
As shown in fig. 6, changeover portion pylon 3 is made up of 32, eight four identical columns 31, some support bars braces 33.
The bottom of four root post 31 pours into the center of floating drum top cover 11 of four floating drums 1 and welded together with it respectively, and four root posts 31 are equal
It is centroclinal to foundation structure with identical angle from the bottom to top；More support bars 32 are welded between four root posts 31 and form purlin
Posture steel construction.Because the column 31 of changeover portion pylon 3 is inserted into inside floating drum 1, therefore segment limit should be inserted in column 31
It is internal to prevent from deforming provided with cross floor of putting more energy into.Changeover portion pylon 3 is mainly used for connecting combined type foundation structure and top
Wind power equipment, its tower height are adjusted correspondingly according to the depth of water of reality.Gas-liquid is respectively arranged with inside per root post 31
Pipeline, grout lines and liquid level sensor, wherein air-liquid pipeline by column 31 extend to the floating drum top cover 11 of floating drum 1 with
Under, the substructure water-filling of floating drum 1, draining can also can be inflated, exhaust to the substructure of floating drum 1, so as to realize towage
Aeration quantity or ballast water capacity are adjusted after increasing buoyancy, and foundation structure inclination when buoyancy is inadequate in journey, makes its corresponding floating drum 1
Rise is sunk, so as to adjust the balance of mass-type foundation structure；Wherein the interface of grout lines can be opened in the side wall of column 31
Certain altitude, grout lines extend to the box house of the superstructure of floating drum 1 and buoyancy tank 2 by column 31.Per root post 31 with
Brace 33 is connected between its adjacent buoyancy tank 2, the lower end of brace 33 is passed through inside buoyancy tank 2 by the center of buoyancy tank top plate 21, brace 33
In addition to playing a part of transmitting the load of superstructure to buoyancy tank 1, air-liquid pipeline and grout lines are also equipped with inside it, its
Air-liquid pipeline can be close to floor 24 in an intermediate position in buoyancy tank 2 and set, and buoyancy tank bottom plate be extended to below 22, for anti-skid
It is inflated inside skirtboard 25；Its grout lines extends to buoyancy tank top plate below 21, for the box house grouting to buoyancy tank 1.
After structure installation, it is in the milk to the superstructure jackstone ballast of floating drum 1 or by grout lines, simultaneously
Mortar will be poured into by grout lines to the box house of buoyancy tank 2, led to inside column 31 without grouting, each pipe-line system holding
Freely.Each region of box house of buoyancy tank 2 is connection therefore can ensure that mortar is full of the casing of whole buoyancy tank 2, general every
The grout lines of column 31 are provided with two outlets, to two buoyancy tanks 2 being connected on same floating drum 1 while are in the milk respectively, so that
Ensure that same buoyancy tank 2 realizes the filling speed from both ends to centre, improve speed of application and grouting uniformity coefficient.Per root post 31
Brace 33 is connected between buoyancy tank 2 adjacent thereto can also realize that the extension from the casing middle part of buoyancy tank 2 to both ends is in the milk, this
Kind grouting way can carry out carrying out respectively simultaneously with the grouting by floating drum 1.
Using liquid level sensor, four root posts 31 of changeover portion pylon 3 are also used as leveling observation system, main former
Reason is that liquid fluid-tight gas is filled with inside column 31, on the one hand ensure that the bottom inflatable of floating drum 1 is not revealed, is on the other hand dragging
By observing the liquid level situation of change of liquid after the inside fluid-tight of column 31 during boat, it can be determined that the bottom of column 31 institute is right
Answer air pressure size in floating drum 1 and whether gas leakage, so as to control the air pressure balance inside four floating drums 1, ensure whole basis
Structure is in erectility.
When structure is integrally reclaimed, air-liquid pipeline inside vertical rod 1 inside of sheath skirt 13 of floating drum 1 is carried out water filling or
Inflate, the air-liquid pipeline inside brace 33 carries out water filling or inflation to the inside of anti-skid skirtboard 25 of buoyancy tank 2, so makes floating drum 1
The air pressure inside of anti-skid skirtboard 25 of sheath skirt 13 and buoyancy tank 2 strengthens, and total pressure head, which reduces, gradually jacks up foundation structure, treats sheath skirt 13
Basis will slowly be floated after departing from sea bed with anti-skid skirtboard 25, finally be hauled to bank.
Four floating drums 1 and four buoyancy tanks 2 weld together successively, independent each other, inflation, row between each several part
The measures such as water, grouting can be carried out independently simultaneously, do not interfere with each other, shortened construction period.
The construction method of four floating drum buoyancy tank foundation structures of combinations thereof formula sea, is carried out in accordance with the following steps：
(1) precast construction：Land based plant is prefabricated to process all parts, and floating drum 1, buoyancy tank 2, changeover portion pylon 3 are pacified
Dress up four floating drum buoyancy tank foundation structure on integral combined type sea.
(2) initial adjustment prepares：Four floating drum buoyancy tank foundation structures are lifted into sea on combined type sea, and it is heavy to be conducted oneself with dignity using foundation structure
Enter certain depth, buoyancy is increased by inflation in the sheath skirt 13 to floating drum 1, and the draft needed according to towage is adjusted
Section, the substructure of floating drum 1 is inflated by the inside water-filling ballast of buoyancy tank 2 when absorbing water inadequate, when absorbing water excessive increase displacement or
A certain amount of ballast water is discharged in inflation in buoyancy tank 2, reduces deadweight.
Rear column 31 in water filling fluid-tight, prepared for follow-up delivery waterborne.
(3) delivery waterborne：Four floating drum buoyancy tank foundation structures on combined type sea are carried out by towing cable rope using towboat equipment
Single-point towage, heaving pile point are arranged therein on one or two floating drum 1, typically flushed with the water surface, and towage speed is unsuitable too fast.
, it is necessary to carrying out water-filling ballast inside the other three or two floating drums 1 before towage, structure is set to have necessarily
Hypsokinesis angle, the floating drum 1 of heaving pile point can produce obvious burying and appear for the first time as therefore initial hypsokinesis during overall towage
Angle can neutralize the phenomenon that leans forward for burying first formation, so as to ensure the stability requirement during haul, reduce dynamic response.
During delivery, by the level detection equipment in the column 31 and column 31 after internal water flooding, observe each vertical
Whether the situation of change of the internal liquid level of post 31, preliminary judgement basis structure keep poised state, if any inclining for deviation equilbrium position
Tiltedly carry out leveling.
(4) basis enters water：Sink to installing after delivery to specified location, the processing of the lower exhaust of floating drum 1 is made with reducing buoyancy
Foundation structure is sunk, while water-filling in the casing of buoyancy tank 2, foundation structure deadweight increase, foundation structure is further sunk, until
The sheath skirt 13 of floating drum 1 and the anti-skid skirtboard 25 of buoyancy tank 2 contact sea bed.
(5) suction penetration：It is right after the sheath skirt 13 of floating drum 1 and the anti-skid skirtboard 25 of buoyancy tank 2 insert ground certain depth
The substructure of floating drum 1 is drawn water, and foundation structure is further sunk up to floating drum top cover 11 and the full contact mud of buoyancy tank bottom plate 22 face,
Continue to draw water to the substructure of floating drum 1 and continue for some time, negative pressure consolidation process is carried out to the soil body.
In suction penetration process, when soil property is uneven or the substructure of floating drum 1 pumping rate it is inconsistent, cause each floating
Difference occurs for 1 submergence depth of cylinder, so that foundation structure run-off the straight, it is therefore desirable to Levelling operation is carried out, by updip
The substructure of floating drum 1 increases pumping rate and/or in the substructure of floating drum 1 inflation having a down dip or water-filling, progress Levelling operation.
(6) be in the milk ballast：After the completion of negative pressure is reinforced, the casing by the grout lines of vertical rod 31 and brace 33 to buoyancy tank 2
Inside carries out grouting treatment, and the superstructure of floating drum 1 can be with jackstone ballast or grouting ballast.
(7) superstructure is installed：After the completion of grouting treatment, top wind power equipment is lifted, carries out installation waterborne.
(8) recycle：Lifting top wind power equipment is removed first, secondly by the air-liquid pipeline inside vertical rod 31 to floating
The internal water flooding of sheath skirt 13 of cylinder 1 or inflation increase internal pressure, and pass through resistance of the air-liquid pipeline inside brace 33 to buoyancy tank 2
The sliding inside of skirtboard 25 carries out water filling or inflation increase internal pressure so that the sheath skirt 13 of floating drum 1 and the anti-skid skirtboard 25 of buoyancy tank 2
Separated with foundation, buoyancy further increases, and whole foundation structure slowly floats, floating to after on sea can by towboat by its
Tow back to land.
Although the preferred embodiments of the present invention are described above in conjunction with accompanying drawing, the invention is not limited in upper
The embodiment stated, above-mentioned embodiment is only schematical, be not it is restricted, this area it is common
Technical staff in the case of present inventive concept and scope of the claimed protection is not departed from, may be used also under the enlightenment of the present invention
By make it is many in the form of specific conversion, these are belonged within protection scope of the present invention.
Claims (10)
1. a kind of sea four floating drums-buoyancy tank combined type foundation structure, it is characterised in that including four identical floating drums, four phases
Same buoyancy tank and a changeover portion pylon；Four floating drums are sequentially connected according to its central point in the horizontal plane surrounds square
It is arranged, is connected per the two neighboring floating drum by a buoyancy tank, the center line of the buoyancy tank along its length passes through
The axis of floating drum described in its both ends；The floating drum connects changeover portion pylon with the buoyancy tank top, and the changeover portion pylon is used for
Connect top wind power equipment；
The floating drum is made up of floating drum top cover, barrel, sheath skirt, radial rib plate, ring floor, subdivision plate；On the floating drum top cover
Portion edge sets the barrel, lower edges to set the sheath skirt；The floating drum top cover forms the floating drum with the barrel
Superstructure, the superstructure of the floating drum is interior to set the radial rib plate and the ring floor；The floating drum top cover and institute
The substructure that sheath skirt forms the floating drum is stated, skirtboard in annular is provided with the substructure of the floating drum；
The buoyancy tank is made up of buoyancy tank top plate, buoyancy tank bottom plate, side plate, floor, anti-skid skirtboard, the buoyancy tank top plate, the buoyancy tank
Bottom plate, the side plate form the casing of cuboid cavity structure, and the box house of the buoyancy tank is provided with horizontal and vertical more
Block floor, the casing of the buoyancy tank is divided into interconnected region by floor described in polylith；The buoyancy tank top plate both ends are preset with
Stomata, the buoyancy tank bottom plate both ends are preset with water hole, and described float is realized by gas-liquid displacement using the stomata and the water hole
The water-filling of the box house of case and draining；The buoyancy tank bottom plate lower edges set the anti-skid skirtboard；
The changeover portion pylon is made up of four identical columns, some support bars, eight braces；Four column bottoms point
The floating drum top cap central of four floating drums is not poured into and is welded together with it, and from the bottom to top with identical angle to base
Plinth structure centre tilts；The more support bars form truss type steel structure between being connected to four columns；The brace
It is connected between the column buoyancy tank adjacent thereto, the brace lower end is passed through described floating by the buoyancy tank roof center
Inside case, the brace is internally provided with the air-liquid pipeline extended to below buoyancy tank bottom plate and grout lines；The every column
Inside is respectively arranged with air-liquid pipeline, grout lines and liquid level sensor, and wherein air-liquid pipeline is extended to by the column
Below the floating drum top cover of the floating drum, wherein grout lines extend to the superstructure of the floating drum and described floating by the column
The box house of case, wherein liquid level sensor are used for during towage by observing inside the column liquid after fluid-tight
Liquid level changes, and judges the atmospheric pressure state in the floating drum corresponding to the column bottom.
2. a kind of marine four floating drums-buoyancy tank combined type foundation structure according to claim 1, it is characterised in that described floating
The barrel of cylinder highly arrives half, the sheath skirt height of the floating drum for 1/3rd of the floating drum cap diameter
Ratio of height to diameter with the floating drum cap diameter is 0.8-1.5；A diameter of floating drum of skirtboard in the annular of the floating drum
2nd/to three/3rds of cap diameter, it is described annular in skirtboard height be the sheath skirt height 1 to three/3rds
/ bis-.
3. a kind of marine four floating drums-buoyancy tank combined type foundation structure according to claim 1, it is characterised in that described floating
The barrel of the side plate of case and the floating drum is highly consistent, and the height of the anti-skid skirtboard of the buoyancy tank is the side plate height
1/3rd arrive half.
A kind of 4. marine four floating drums-buoyancy tank combined type foundation structure according to claim 1, it is characterised in that the cylinder
It is provided with the range of the middle part of skirt to bottom and cuts native ring, it is described to cut native ring and be arranged in the interior surface of revolution of sheath skirt and/or outer return
Turn face, the section outline for cutting native ring can be angular or arc.
5. a kind of construction method of four floating drums-buoyancy tank combined type foundation structure marine as any one of claim 1-4, its
It is characterised by, carries out in accordance with the following steps：
(1) land based plant is prefabricated processes all parts, and the floating drum, the buoyancy tank, the changeover portion pylon are mounted to
Four floating drum buoyancy tank foundation structures on the combined type sea of one；
(2) four floating drum buoyancy tank foundation structures on combined type sea are lifted into sea, sunk to using foundation structure deadweight, by institute
State inflation in the sheath skirt of floating drum and increase buoyancy, and the draft needed according to towage is adjusted, in the last column
Water filling fluid-tight；
(3) transportation by driving towage is carried out to four floating drum buoyancy tank foundation structures on combined type sea；
(4) sink to installing after four floating drum buoyancy tank foundation structures are consigned to specified location on combined type sea, the bottom of described floating drum
Structure pump-down process makes foundation structure sink to reduce buoyancy, while water-filling increases foundation structure deadweight in the casing of the buoyancy tank
Add, foundation structure is further sunk, until the anti-skid skirtboard of the sheath skirt of the floating drum and buoyancy tank contact sea bed；
(5) after the sheath skirt of the floating drum and the anti-skid skirtboard insertion ground of the buoyancy tank, to the substructure of the floating drum
Draw water, foundation structure is further sunk until the floating drum top cover and buoyancy tank bottom plate full contact mud face, continue to institute
The substructure for stating floating drum is persistently drawn water, to carry out negative pressure consolidation process to the soil body；
(6) after the completion of negative pressure is reinforced, the box house grouting treatment using grout lines to buoyancy tank, the superstructure of floating drum is entered
Row jackstone ballast or grouting ballast；
(7) after the completion of grouting treatment, top wind power equipment is lifted, carries out installation waterborne, construction is completed.
6. a kind of construction method of marine four floating drums according to claim 5-buoyancy tank combined type foundation structure, its feature exist
In the draft needed according to towage described in step (2) is adjusted, especially by the box house for adjusting the buoyancy tank
The substructure displacement of ballast water capacity or the floating drum is carried out.
7. a kind of construction method of marine four floating drums according to claim 5-buoyancy tank combined type foundation structure, its feature exist
In, the transportation by driving towage described in step (3) is navigated using single-point or two point supports, and to except described in arrangement heaving pile point before support is navigated
Water-filling ballasts are carried out inside the other three beyond floating drum or two floating drums, foundation structure is had to bury for neutralization and is appeared for the first time
The hypsokinesis angle of elephant.
8. a kind of construction method of marine four floating drums according to claim 5-buoyancy tank combined type foundation structure, its feature exist
During step (3) described towage, by the column after internal water flooding and its level detection equipment of inside, observation is each vertical
Whether the situation of change of post internal liquid level, preliminary judgement basis structure keep poised state, if any the inclination for deviateing equilbrium position
Carry out leveling.
9. a kind of construction method of marine four floating drums according to claim 5-buoyancy tank combined type foundation structure, its feature exist
In, in the suction penetration process described in step (5), by the substructure of the floating drum in updip increase pumping rate and/
Or in the substructure inflation for the floating drum having a down dip or water-filling, progress Levelling operation.
10. a kind of construction method of marine four floating drums according to claim 5-buoyancy tank combined type foundation structure, its feature
It is, lifting top wind power equipment is removed during recycling first, secondly by the air-liquid pipeline inside the vertical rod to described
The sheath skirt internal water flooding of floating drum or inflation increase internal pressure, and by the air-liquid pipeline inside the brace to the buoyancy tank
Anti-skid skirtboard inside carry out water filling or inflation increase internal pressure so that the anti-skid skirt of the sheath skirt of the floating drum and the buoyancy tank
Plate separates with foundation, after whole foundation structure is slowly floated up on sea, is towed back to by towboat land.
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