CN107806108A - Three floating drum buoyancy tank foundation structures and its construction method on a kind of combined type sea - Google Patents

Three floating drum buoyancy tank foundation structures and its construction method on a kind of combined type sea Download PDF

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Publication number
CN107806108A
CN107806108A CN201710895691.XA CN201710895691A CN107806108A CN 107806108 A CN107806108 A CN 107806108A CN 201710895691 A CN201710895691 A CN 201710895691A CN 107806108 A CN107806108 A CN 107806108A
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CN
China
Prior art keywords
floating drum
buoyancy tank
foundation
plate
floating
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CN201710895691.XA
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Chinese (zh)
Inventor
张浦阳
丁红岩
练继建
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Tianjin University
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Tianjin University
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Priority to CN201710895691.XA priority Critical patent/CN107806108A/en
Publication of CN107806108A publication Critical patent/CN107806108A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • E02D27/425Foundations for poles, masts or chimneys specially adapted for wind motors masts

Abstract

The invention belongs to the infrastructure technologies field of ocean engineering, disclose three floating drum buoyancy tank foundation structures and its construction method on a kind of combined type sea, its foundation structure includes three floating drums arranged in the horizontal plane according to its central point line one equilateral triangle of composition, 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

Three floating drum buoyancy tank foundation structures and its construction method on a kind of combined type sea
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 marine wind electric field gradually is needed to examine by more and more extensive concern and participation, the construction of marine wind electric field Consider the foundation structure form of equipment installation, it is typical such as offshore anemometer tower and the such important feature of offshore wind generating.Tradition Foundation pattern have gravity type foundation, single-pile foundation, the foundation pattern used mostly at present has steel pipe pile foundation (anemometer tower), three Foot stool basis, jacket basis and suction tube are basic (wind-driven generator).In these foundation patterns, steel-pipe pile, single pile, three pin The complicated construction technique of the foundation patterns such as frame, jacket, transport installation needs large-scale equipment to be transported, lifted, thus the duration It is long, and operating expenses is higher, piling positioning and torsional angle etc. are difficult to accurately hold, and pile sinking efficiency comparison is low.Gravity type foundation is overall By dead load and the weight resistance external load of filler and ballast thereon, structural stability is maintained, Construction Principle is concise, fills out Material is low with ballast material cost, and construction cost is relatively low for shallow foundation;But it is 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, therefore gravity type foundation is applicable the depth of water and is limited in scope.Suction tube foundation bearing capacity is strong, and transport installation is simple, recovery Relatively easily, while suction tube foundation structure form is simple, and applicable seabed conditions are extensive, at the same sheath skirt stability against slope compared with Height, construction and installation principle are concise.But with compared with larger ratio of height to diameter bucket foundation sinking watching exist sink it is not in place and The problem of leveling control is difficult, while the problems such as flexing occurs for the steel constructions such as skirtboard under working condition be present, equally govern cylinder The development on type basis.
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 three floating drum buoyancy tank foundation structures and its construction method on a kind of combined type sea, 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:
Three floating drum buoyancy tank foundation structure on a kind of combined type sea, including three identical floating drums, three identical buoyancy tanks and One changeover portion pylon;Three floating drums form an equilateral triangle according to its central point line in the horizontal plane and arranged Cloth, floating drum described in each two are connected by a buoyancy tank, and 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, floating drum bottom;Institute State floating drum top cover upper edge and the sheath skirt is set along the setting barrel, lower edges;The floating drum top cover and the barrel structure Into the superstructure of the floating drum, the radial rib plate and the ring floor are set in the superstructure of the floating drum;It is described Floating drum top cover forms the substructure of the floating drum with the sheath skirt, and subdivision plate, institute are provided with the substructure of the floating drum State subdivision plate and the substructure of the floating drum is separated into 4 to seven subdivisions sealed against each other;The floating drum bottom is used in transportation by driving During be packaged in the substructure bottom surface of the floating drum;
The buoyancy tank is made up of buoyancy tank top plate, buoyancy tank bottom plate, side plate, top floor, anti-skid skirtboard, bottom floor, described 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 set There is horizontal and vertical polylith top floor, the casing of the buoyancy tank is divided into interconnected area by top floor described in polylith Domain;The buoyancy tank top plate both ends are preset with stomata, and the buoyancy tank bottom plate both ends are preset with water hole, utilize the stomata and the water Water-filling and the draining of the box house of the buoyancy tank are realized by gas-liquid displacement in hole;Described in the buoyancy tank bottom plate lower edges are set Anti-skid skirtboard, the buoyancy tank bottom plate in the anti-skid skirtboard institute Special composition with being provided with bottom floor;
The changeover portion pylon is made up of three identical columns, some support bars, six roots of sensation brace;Three column bottoms End pours into the floating drum top cap central of three 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 are connected to triangle truss-like steel knot between three columns Structure;The brace is connected between the column buoyancy tank adjacent thereto, and the brace lower end is by the buoyancy tank top plate The heart is passed through inside the buoyancy tank, and the brace is internally provided with the air-liquid pipeline extended to below buoyancy tank bottom plate;Every described vertical Air-liquid pipeline, grout lines and liquid level sensor are respectively arranged with inside post, wherein air-liquid pipeline is extended by the column To the floating drum top cover of the floating drum, wherein grout lines extend to the superstructure of the floating drum and described by the column The box house of buoyancy tank, wherein liquid level sensor are used for during towage by observing inside the column liquid after fluid-tight Liquid level change, judge the atmospheric pressure state in the floating drum corresponding to the column bottom.
Preferably, the floating drum is consistent with the total height of the buoyancy tank, and the barrel and sheath skirt of the floating drum are highly consistent, institute State that side plate and the anti-skid skirtboard of buoyancy tank are highly consistent, and the side plate of the barrel of the floating drum and the buoyancy tank is highly consistent, it is described floating The sheath skirt of cylinder and the anti-skid skirtboard of the buoyancy tank are highly consistent.
Preferably, the substructure of the floating drum is divided into middle cabin and wing tank room by the subdivision plate of the floating drum, described Middle cabin is circular or regular polygon, and the quantity of the wing tank room is even number.
Preferably, the bottom floor of the buoyancy tank is cross demarcation strip.
Preferably, the brace is internally provided with grout lines.
A kind of construction method of the marine three floating drum buoyancy tank foundation structures of combinations thereof formula, 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 three floating drum buoyancy tank foundation structure on integral combined type sea;
(2) after the floating drum bottom being sealed up into floating drum bottom, three floating drum buoyancy tank foundation structures are lifted into sea on combined type sea Face, the draft for being sunk to and being needed according to towage using foundation structure deadweight are adjusted;
(3) single-point towage is carried out to three floating drum buoyancy tank foundation structures on combined type sea;
(4) sink to installing after three floating drum buoyancy tank foundation structures are consigned to specified location on combined type sea, to the floating drum Substructure water filling is until remove the floating drum bottom, and then water-filling makes foundation structure deadweight increase in the casing of the buoyancy tank, 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, before the single-point towage described in step (3), to two other in addition to the floating drum of arrangement heaving pile point Water-filling ballast is carried out inside the floating drum, there is foundation structure and be used to neutralize the hypsokinesis angle buried and appear elephant for the first time.
Wherein, in the sinking installation process described in step (4), 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:
Three floating drum buoyancy tank foundation structures on the combined type sea of the present invention, by three floating drums, three 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 three 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 three 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 three floating drums and three buoyancy tanks by strong point effect, gives full play to combined type basis knot The bearing capacity of all parts in structure.
Three floating drum buoyancy tank foundation structures and its construction method on the combined type sea of the present invention so that the Water Plane of single floating drum Area is smaller, and towage process easily accurately controls leveling, and the synergy between three floating drums is added in combination with floating box structure, Increase the contact area of the bottom of foundation and sea bed, the increase of end bearing power, furthermore branch of the buoyancy tank as top changeover portion pylon Support structure, 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 casing Inside finally needs ballast grouting treatment, increases the deadweight of foundation structure, improves stability against overturning, and total bearing capacity performance carries Rise, 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 three floating drum buoyancy tank foundation structures on combined type sea provided by the present invention;
Fig. 2 is the vertical view visual angle schematic diagram of three floating drum buoyancy tank foundation structures on combined type sea provided by the present invention;
Fig. 3 is that three floating drum buoyancy tank foundation structures look up visual angle schematic diagram on combined type sea provided by the present invention;
Fig. 4 is the spar structures schematic diagram of three floating drum buoyancy tank foundation structures on combined type sea provided by the present invention;
Fig. 5 is the floating box structure schematic diagram of three floating drum buoyancy tank foundation structures on combined type sea provided by the present invention;
Fig. 6 is the changeover portion pylon structure signal of three floating drum buoyancy tank foundation structures on combined type sea provided by the present invention Figure.
In figure:1st, floating drum, 11, floating drum top cover, 12, barrel, 13, sheath skirt, 14, radial rib plate, 15, ring floor, 16, point Deck board, 17, floating drum bottom;2nd, buoyancy tank, 21, buoyancy tank top plate, 22, buoyancy tank bottom plate, 23, side plate, 24, top floor, 25, anti-skid skirt Plate, 26, bottom floor;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 three floating drum buoyancy tank foundation structure on a kind of combined type sea, main bag Include three 1, three, identical floating drum changeover portion pylons 3 of identical buoyancy tank 2, one.
Three floating drums 1 can form an equilateral triangle according to its central point line in the horizontal plane and be arranged.
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, Subdivision plate 16, floating drum bottom 17 are formed, and wherein floating drum bottom 17 is not fixedly connected with miscellaneous part, is only made in transportation With.The circular upper edge of floating drum top cover 11 edge is provided with the barrel 12 of annular, lower edges are provided with annular sheath skirt 13, barrel 12 and the height of sheath skirt 13 approximately, with ensure floating drum about 1 two-part structure jointly, equally play function.Floating drum top cover 11 superstructures of floating drum 1 formed with barrel 12 have the characteristics of gravity bucket foundation, can be as the ballast after installation Region.Uniform radial rib plate 14 and uniform ring floor 15 are provided with the superstructure of floating drum 1, primarily to preventing cylinder Wall 12 deforms after ballast.Floating drum top cover 11 has wide shallow formula suction cartridge type with the substructure of floating drum 1 that sheath skirt 13 is formed The characteristics of basic, be on the one hand used to be pulled through bottom in journey floating and seal up floating drum bottom 17, as floating drum increase structure buoyancy and Realize the control leveling during towage;On the other hand floating drum bottom 17 is detached to ensure that its is normal in sinking installation process Sink, bottom sheath skirt 13 and inside points deck board 16 are finally inserted into inside ground, and basic energy is not only made by way of taking out negative pressure Enough be brought into close contact, at the same can foundation, while ensureing that structure has stability against overturning, also exhibited standard Stability against slope.It is provided with subdivision plate 16 in the substructure of floating drum 1, subdivision plate 16 is by top cover 11 and 13 Special compositions of sheath skirt Point four to seven subdivisions, water-tight, air tight, the tune realized in towage and sinking watching that can be independent is sealed between each subdivision Flat operation;The shape in in-between cabin is not limited to the circle of the present embodiment diagram, can be configured as regular polygon, structure type Compare flexibly.
Three floating drums 1 are connected with each other by three buoyancy tanks 2, and a buoyancy tank 2 is connected between each two floating drum 1.The both ends of buoyancy tank 2 It is welded on floating drum 1, so that three buoyancy tanks 2 and three floating drums 1 form an entirety, the center line along its length of buoyancy tank 2 Through the axis of its both ends floating drum 1.Floating drum 1 is consistent with the total height of buoyancy tank 2, to ensure that whole foundation structure is upper with flushing Bottom profiled, and superstructure load is evenly transferred on each floating drum 1 and buoyancy tank 2 of foundation structure.
As shown in figure 5, buoyancy tank 2 by buoyancy tank top plate 21, buoyancy tank bottom plate 22, side plate 23, top floor 24, anti-skid skirtboard 25, Bottom floor 26 is formed.Buoyancy tank top plate 21, buoyancy tank bottom plate 22, side plate 23 form the casing of cuboid cavity structure, the height of casing Spend (i.e. the height of side plate 23) and the superstructure of floating drum 1 (i.e. the height of barrel 12) unanimously, i.e. the superstructure of floating drum 1, the case of buoyancy tank 1 Body bottom surface is flushed, and basis is bonded completely with sea bed face after the completion of ensureing heavy pass through.The box house of buoyancy tank 2 is provided with horizontal and vertical Polylith top floor 24, polylith top floor 24 will be divided into interconnected multiple regions, the work of top floor 24 inside buoyancy tank 2 With being to strengthen the inside rigidity of buoyancy tank 2, prevent the side plate 23 of the steel construction after grouting from bending deformation occurs.The both ends of buoyancy tank top plate 21 are pre- Stomata provided with Valve controlling, is inflated during for air-water displacement or exhaust;The both ends of buoyancy tank bottom plate 22 are preset with Valve controlling Water hole, 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, can be replaced by gas-liquid and realize that the box house of buoyancy tank 2 fills Water, draining.The lower edges of buoyancy tank bottom plate 22 are provided with anti-skid skirtboard 25, anti-skid skirtboard 25 with the height of side plate 23 approximately, with Ensureing buoyancy tank, two-part structure is common about 2, equally plays function.In buoyancy tank bottom plate 22 and anti-skid 25 Special compositions of skirtboard Bottom floor 26 is provided with, bottom floor 26 is cross demarcation strip, and bottom floor 26 is unsuitable excessive, and it is that increase is anti-skid that it, which is acted on, The lateral rigidity of skirtboard 25, while increase side friction, improve stability.The anti-skid skirtboard 25 of buoyancy tank 2 and the sheath skirt 13 of floating drum 1 It is preferred with highly consistent, it is easy to operation.The casing of buoyancy tank 2 can be increased during towage with water-filling conducts oneself with dignity, and passes through regulation Different drafts, reach the requirement of towage stability;When sinking to installing, complete water filling, ensure fall rate, basis is heavy to be passed through After the completion of, the box house of buoyancy tank 2 carries out cement-grouting consolidation by the grout lines of changeover portion pylon 3, and increase dead load makes it The characteristics of with gravity type foundation structure.The anti-skid skirtboard 25 of the lower periphery one of buoyancy tank 2 circle mainly provides resistant slide, antidumping is held Power is carried, while the area of buoyancy tank bottom plate 22 is larger, can be as main sole plate structure.
As shown in fig. 6, changeover portion pylon 3 is made up of three identical columns 31, some support bars 32, six roots of sensation brace 33. The bottom of three root post 31 pours into the center of floating drum top cover 11 of three floating drums 1 and welded together with it respectively, and three 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 three root posts 31 and form three Angular truss type steel structure.Because the column 31 of changeover portion pylon 3 is inserted into inside floating drum 1, therefore should be inserted in column 31 Prevent from deforming provided with cross floor of putting more energy into inside segment limit.Changeover portion pylon 3 is mainly used for connecting combined type foundation structure With top wind power equipment, its tower height is adjusted correspondingly according to the depth of water of reality.Set respectively inside per root post 31 There are air-liquid pipeline, grout lines and liquid level sensor, wherein air-liquid pipeline is extended to the floating drum top cover of floating drum 1 by column 31 Less than 11, the substructure water-filling of floating drum 1, draining can also can be inflated, exhaust to the substructure of floating drum 1;Wherein grout pipe The interface in road can be opened in the certain altitude of the side wall of column 31, grout lines by column 31 extend to the superstructure of floating drum 1 and The box house of buoyancy tank 2.Brace 33 is connected with per between the buoyancy tank 2 adjacent thereto of root post 31, the lower end of brace 33 is by buoyancy tank top The center of plate 21 is passed through inside buoyancy tank 2, and brace 33 is in addition to playing a part of transmitting the load of superstructure to buoyancy tank 1, inside it Air-liquid pipeline and grout lines are also equipped with, its air-liquid pipeline can be close to top floor 24 in an intermediate position in buoyancy tank 2 and set Put, extend to buoyancy tank bottom plate below 22, for being inflated inside anti-skid skirtboard 25;Its grout lines extends to buoyancy tank top plate Less than 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.
Three root posts 31 of changeover portion pylon 3 are also used as leveling observation system, and cardinal principle is inside column 31 Liquid fluid-tight gas is filled with, on the one hand ensure that the bottom inflatable of floating drum 1 is not revealed, secondly by observing column during towage The liquid level situation of change of liquid after 31 inside fluid-tights, it can be determined that the air pressure size corresponding to the bottom of column 31 in floating drum 1 And whether gas leakage, so as to control the air pressure balance inside three floating drums 1, ensure that whole foundation 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.
Three floating drums 1 and three 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 three 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 three floating drum buoyancy tank foundation structure on integral combined type sea.
(2) initial adjustment prepares:After floating drum bottom 17 is sealed up in each bottom of floating drum 1, three floating drum buoyancy tanks basis knot on combined type sea Structure is lifted into sea, sinks to certain depth using foundation structure deadweight, is adjusted, absorbed water according to the draft that towage needs By the inside water-filling ballast of buoyancy tank 2 when not enough, the substructure of floating drum 1 is inflated in increase displacement or buoyancy tank 2 when absorbing water excessive A certain amount of ballast water is discharged in inflation, reduces deadweight.
(3) delivery waterborne:Three 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 a floating drum 1, typically flushed with the water surface, and towage speed is unsuitable too fast.
Before single-point towage, it is necessary to carrying out water-filling ballast inside two other floating drum 1, after structure is had necessarily Degree of tilt, the floating drum 1 of heaving pile point can produce obvious burying and appear for the first time as therefore initial back rake angle during overall towage The phenomenon that leans forward for burying first formation can be neutralized, so as to ensure the stability requirement during haul, reduces dynamic response.
(4) basis enters water:Sink to installing after delivery to specified location, to the substructure water filling of floating drum 1, until floating drum bottom 17 can remove, then water-filling in the casing of buoyancy tank 2, foundation structure deadweight increase, foundation structure is further sunk, until floating The sheath skirt 13 of cylinder 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 1. three floating drum buoyancy tank foundation structure on combined type sea, it is characterised in that including three identical floating drums, three it is identical Buoyancy tank and a changeover portion pylon;Three floating drums form an equilateral triangle according to its central point line in the horizontal plane Shape is arranged, and floating drum described in each two is connected by a buoyancy tank, and the center line of the buoyancy tank along its length passes through it The axis of floating drum described in both ends;The floating drum connects changeover portion pylon with the buoyancy tank top, and the changeover portion pylon is used to connect Connect portion's wind power equipment;
    The floating drum is made up of floating drum top cover, barrel, sheath skirt, radial rib plate, ring floor, subdivision plate, floating drum bottom;It is described floating Cylinder top cover upper edge sets the sheath skirt along the setting barrel, lower edges;The floating drum top cover forms institute with the barrel The superstructure of floating drum is stated, the radial rib plate and the ring floor are set in the superstructure of the floating drum;The floating drum Top cover and the sheath skirt form the substructure of the floating drum, are provided with subdivision plate in the substructure of the floating drum, described point The substructure of the floating drum is separated into 4 to seven subdivisions sealed against each other by deck board;The floating drum bottom is used in transportation by driving process In be packaged in the substructure bottom surface of the floating drum;
    The buoyancy tank is made up of buoyancy tank top plate, buoyancy tank bottom plate, side plate, top floor, anti-skid skirtboard, bottom floor, 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 stroke To the polylith top floor with longitudinal direction, the casing of the buoyancy tank is divided into interconnected region by top floor described in polylith;Institute State buoyancy tank top plate both ends and be preset with stomata, the buoyancy tank bottom plate both ends are preset with water hole, led to using the stomata and the water hole Cross water-filling and draining that gas-liquid replaces the box house for realizing the buoyancy tank;The buoyancy tank bottom plate lower edges set described anti-skid Skirtboard, the buoyancy tank bottom plate in the anti-skid skirtboard institute Special composition with being provided with bottom floor;
    The changeover portion pylon is made up of three identical columns, some support bars, six roots of sensation brace;Three column bottoms point The floating drum top cap central of three 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 are connected to triangle truss type steel structure between three columns;Institute State brace to be connected between the column buoyancy tank adjacent thereto, the brace lower end is passed through by the buoyancy tank roof center Inside the buoyancy tank, the brace is internally provided with the air-liquid pipeline extended to below buoyancy tank bottom plate;Inside the every column Air-liquid pipeline, grout lines and liquid level sensor are respectively arranged with, wherein air-liquid pipeline is extended to described by the column Below the floating drum top cover of floating drum, wherein grout lines extend to the superstructure of the floating drum and the buoyancy tank by the column Box house, wherein liquid level sensor are used for the liquid level by observing liquid after fluid-tight inside the column during towage Height change, judge the atmospheric pressure state in the floating drum corresponding to the column bottom.
  2. 2. three floating drum buoyancy tank foundation structure on a kind of combined type sea according to claim 1, it is characterised in that the floating drum Consistent with the total height of the buoyancy tank, the barrel and sheath skirt of the floating drum are highly consistent, the side plate of the buoyancy tank and anti-skid skirtboard Highly consistent, the side plate of the barrel of the floating drum and the buoyancy tank is highly consistent, the resistance of the sheath skirt of the floating drum and the buoyancy tank Sliding skirtboard is highly consistent.
  3. 3. three floating drum buoyancy tank foundation structure on a kind of combined type sea according to claim 1, it is characterised in that the floating drum Subdivision plate the substructure of the floating drum is divided into middle cabin and wing tank room, the middle cabin is circular or just polygon Shape, the quantity of the wing tank room is even number.
  4. 4. three floating drum buoyancy tank foundation structure on a kind of combined type sea according to claim 1, it is characterised in that the buoyancy tank Bottom floor be cross demarcation strip.
  5. 5. three floating drum buoyancy tank foundation structure on a kind of combined type sea according to claim 1, it is characterised in that the brace It is internally provided with grout lines.
  6. 6. it is a kind of as any one of claim 1-5 on combined type sea three floating drum buoyancy tank foundation structures construction method, 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 Three floating drum buoyancy tank foundation structures on the combined type sea of one;
    (2) after the floating drum bottom being sealed up into floating drum bottom, three floating drum buoyancy tank foundation structures are lifted into sea on combined type sea, profit The draft for being sunk to and being needed according to towage with foundation structure deadweight is adjusted;
    (3) transportation by driving towage is carried out to three floating drum buoyancy tank foundation structures on combined type sea;
    (4) sink to installing after three floating drum buoyancy tank foundation structures are consigned to specified location on combined type sea, to the bottom of the floating drum Structure water filling is until remove the floating drum bottom, and then water-filling makes foundation structure deadweight increase, basis in the casing of the buoyancy tank 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.
  7. 7. the construction method of three floating drum buoyancy tank foundation structures, its feature exist on a kind of combined type sea according to claim 6 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.
  8. 8. the construction method of three floating drum buoyancy tank foundation structures, its feature exist on a kind of combined type sea according to claim 6 In, the transportation by driving towage described in step (3) is navigated using single-point support, and before single-point support boat, to except described in arrangement heaving pile point Water-filling ballast is carried out inside two other described floating drum beyond floating drum, after foundation structure is had and is used to neutralize and buries and appear elephant for the first time Degree of tilt.
  9. 9. the construction method of three floating drum buoyancy tank foundation structures, its feature exist on a kind of combined type sea according to claim 6 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. 10. the construction method of three floating drum buoyancy tank foundation structures, its feature exist on a kind of combined type sea according to claim 6 Lifting top wind power equipment is removed first when, recycling, secondly by the air-liquid pipeline inside the vertical rod to described floating The sheath skirt internal water flooding of cylinder or inflation increase internal pressure, and by the air-liquid pipeline inside the brace to the buoyancy tank Water filling or inflation increase internal pressure are carried out inside anti-skid skirtboard so that the anti-skid skirtboard of the sheath skirt of the floating drum and the buoyancy tank Separate with foundation, after whole foundation structure is slowly floated up on sea, towed back to by towboat land.
CN201710895691.XA 2017-09-28 2017-09-28 Three floating drum buoyancy tank foundation structures and its construction method on a kind of combined type sea Pending CN107806108A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108797552A (en) * 2018-06-19 2018-11-13 安徽枫雅轩科技信息服务有限公司 A kind of offshore drilling platform support device
CN109458304A (en) * 2018-11-30 2019-03-12 上海电气风电集团有限公司 A kind of semisubmersible-type floatation type blower foundation suitable for big megawatt-level wind unit
CN109682355A (en) * 2019-01-23 2019-04-26 彭劲松 A kind of plotting board of construction engineering cost

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108797552A (en) * 2018-06-19 2018-11-13 安徽枫雅轩科技信息服务有限公司 A kind of offshore drilling platform support device
CN109458304A (en) * 2018-11-30 2019-03-12 上海电气风电集团有限公司 A kind of semisubmersible-type floatation type blower foundation suitable for big megawatt-level wind unit
CN109682355A (en) * 2019-01-23 2019-04-26 彭劲松 A kind of plotting board of construction engineering cost
CN109682355B (en) * 2019-01-23 2021-04-13 彭劲松 Mapping device for construction cost

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