CN105756081B - Self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation and its construction method - Google Patents

Self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation and its construction method Download PDF

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Publication number
CN105756081B
CN105756081B CN201610292510.XA CN201610292510A CN105756081B CN 105756081 B CN105756081 B CN 105756081B CN 201610292510 A CN201610292510 A CN 201610292510A CN 105756081 B CN105756081 B CN 105756081B
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China
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cylinder
self
locking head
prestress wire
round platform
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CN201610292510.XA
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Chinese (zh)
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CN105756081A (en
Inventor
马逸鹄
梁峰
张明熠
杨州
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江苏金海新能源科技有限公司
内蒙古金海新能源科技股份有限公司
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Priority to CN201610292510.XA priority Critical patent/CN105756081B/en
Publication of CN105756081A publication Critical patent/CN105756081A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/44Foundations for machines, engines or ordnance

Abstract

The invention discloses a kind of self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation and its construction method, it includes tower (1), tower (1) is connected on ring beam (12) by prestressed bolt (2), ring beam (12) is located at the top of cylinder (5), prestress wire (3) is provided with cylinder (5) wall, prestress wire (3) upper end is connected with end socket short column (13), platform guardrail (14) is embedded on end socket short column (13), cylinder (5) bottom is provided with bottom plate (6), bottom plate (6) bottom has poured grouting material (8), sealing water pipe (7) is stuck in bottom plate (6) bottom, garter spring (15) is welded with cylinder (5) inwall, self-locking head anchor pole (10) is anchored in the anchor hole (9) of prestress wire (3) lower end.The present invention is reasonable in design, can be constructed in 20 meters or so of deep-sea area, construction technology is stable, efficiency high, and cost is low, workable, and security is good.

Description

Self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation and its construction method

Technical field

The present invention relates to a kind of offshore wind power foundation, it is more particularly to a kind of available for 20m or so depth of water rock foundation from Tapered end prestress wire truncated cone-shaped concrete cylinder offshore wind turbine foundation and its construction method.

Background technology

The load environment of offshore wind turbine is special and complicated, existing several offshore foundation forms in world wide, exists mostly The problems such as construction is difficult, cost is high.Therefore need that research and development cost is less expensive, blower foundation form of easy construction, at present There is not ripe effective solution also for 20 meters or so of deep-sea area of the depth of water.

The content of the invention

Goal of the invention:It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of reasonable in design, operation It is convenient, can self-floating towing self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, another object of the present invention is to carry For the construction method of the self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation.Self-locking head prestressing force provided by the invention Steel strand wires round platform concrete cylinder offshore wind turbine foundation can drag floating navigation, and prestressed rock anchor head is applied in gravity type foundation, with Reduce key dimension and weight, can be applied to 20 meters or so of deep-sea area.

Technical scheme:In order to realize the above object the technical scheme that the present invention takes is:

A kind of self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, it includes tower, and tower passes through prestressing force On ring beam, ring beam is located at the top of cylinder anchor bolts, and prestress wire, prestress wire upper end are provided with barrel wall It is connected with end socket short column, platform guardrail is embedded on end socket short column, and cylinder body bottom is provided with bottom plate, and bottom base plate has poured grouting Material, sealing water pipe are stuck in bottom plate bottom, garter spring are welded with cylinder inboard wall, self-locking head is anchor rod anchored in prestress wire lower end Anchor hole in;

Gas cell is installed, gas cell periphery is enclosed with netting, and netting is connected with garter spring in described cylinder;

Cylinder is connected with the hydraulic rockshaft on girder steel, and girder steel is connected with fife, and fife is connected with floating drum;

Described cylinder top is provided with base roof plate, and prestressed bolt lower end is connected on base roof plate, in base roof plate The heart offers the circular hole of gas cell taking-up.

Some preformed holes of tower annular distribution.Preformed hole can penetrate water knife cleaning sea bed in the construction stage and basis combines Face;Grouting Pipe is penetrated to slip casting between the bottom of foundation and sea bed;Bolthole is bored, inserts self-locking head steel strand wires and sleeve pipe;Tensioning is expanded Big self-locking head, to the slip casting of anchor pole bottom, sleeve pipe is taken out in rotation.

Preferably, above-described self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, it is described Self-locking head anchor pole includes self-locking head round platform nut, self-locking head overcoat, short tube with holes, retainer plate, water shutoff plate, tool-type push pipe and PVC madjack pipes;Self-locking head round platform nut, self-locking head overcoat and short tube with holes are bolted;Self-locking head round platform nut passes through Anchorage is fixed on the bottom of prestress wire, and water shutoff plate is connected by the thread segment of bottom with short tube with holes, PVC madjack pipes Lower end penetrate it is fixed in the reserved hole of water shutoff plate;Tool-type push pipe is located at short tube top with holes, and tool-type push pipe passes through fixation Circle is concentric with short tube with holes.

Preferably, above-described self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, it is described Girder steel is 4, forms rectangle, is provided with 2 hydraulic rockshafts on every girder steel, and every girder steel connects a fife, every Fife connects a floating drum.

A kind of construction method of self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, comprises the following steps:

A, the support mode on dock, assembling reinforcement, then buried in mould and bury cylinder following peripheral successively from top to bottom The built-in fitting of water pipe, the built-in fitting of leveling support, the built-in fitting of netting garter spring, the lower anchor slab and sleeve pipe of prestressed bolt are sealed, Then successively disturbing concrete, maintenance, form removal;

B, leveling support and becket bridle are installed in drum surface, and do paint protection, then the sealing of cylinder following peripheral is installed Water pipe, sealing water pipe lower section glue one layer of foamed plastics that can improve sealing, then install gas cell in inner barrel, inflate, Connect netting, 4 groups of jack of installation, push pipe and hydraulic pipe;

Outside floating drum is installed, by the cylinder bottom of the hydraulic rockshaft connector drum on girder steel c,;To open a sluice gate and draw out some water, cylinder floats, 2~3m of float draft, with ultrasonic listening seabed flatness, the seabed surface of floating drum bottom is handled with giant, is rushed Walk surface porosity out-of-flatness part;

D, the cylinder hung on floating drum is loosened downwards by hydraulic rockshaft, sinks to seabed, do not contact seabed hovering, Gas cell is not deflated;

E, drive 4 push pipes that cylinder is jacked up into 300~400mm with jack, 60 anchor holes reserved from cylinder insert high Hydraulic giant is pressed, ground at annular bottom surface is washed away, removes loose rubble;

F, retraction jack, and leveling basis, until cylinder contacts and smooth with seabed, high pressure is filled to sealing in water pipe Water, the periphery gap of closed bottom, anchor hole is reserved from cylinder to cylinder body bottom perfusion pea gravel concreten, until being reserved on bottom plate 70% design strength is reached untill spout hole gushes out concrete, after maintenance, inner barrel gas cell is removed, from base roof plate center Gas cell is taken out in hole;The connection of floating drum and cylinder except solution, the absolute altitude change of measure cylinder top surface;

G, from top surface anchor hole down rock drilling, micro- decomposed rock is reached, by prestress wire and tool-type push pipe and PVC mud jacking Manage it is integrally mounted be put into anchor hole, stretch-draw prestressing force steel strand wires to design load 50%, make to be about on self-locking head round platform nut from Tapered end overcoat top is opened, and is pressed into rock anchor hole, then grouting material is pressed into PVC madjack pipes, to self-locking head round platform nut and self-locking Head overcoat is protected, and this operation is symmetrically carried out in cylinder top circumference;After grouting material reaches intensity, throw formula top Pipe, is drawn off;Complete stretch-draw prestressing force steel strand wires are to design load again, and carry out ultra stretching, and finally crimping is fixed;All anchor holes Basic top surface absolute altitude change is determined after tensioning;

H, closed with C60 grouting materials at the top of prestress wire, and the platform guardrail that is connected, on periphery with geotechnological cloth bag Filling silt makees cylinder protection, and inner barrel water-filling maintains an equal level with sea level height;

I. the upper anchor slab of the levelling prestressed bolt of C80 grouting materials is used, makes level height difference within 2~3mm;Then bottom is lifted Tower and stretch-draw prestressing force crab-bolt are saved, then lifts remaining superstructure, completes the installation of blower fan unit.

Compared to the prior art the present invention has the advantages that:

1. self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation provided by the invention, reasonable in design, by force Degree is high, easy for installation, easy leveling, can self-floating towing, prestressed rock anchor head is applied in gravity type foundation, to reduce base Plinth size and weight, it can be applied to 20 meters or so of deep-sea area.

2. the construction method of self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation provided by the invention, can be 20 The deep-sea area construction of rice or so, construction technology is stable, efficiency high, and cost is low, workable, has a safety feature.

Brief description of the drawings

Fig. 1 is a kind of structural representation of self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation provided by the invention Figure.

Fig. 2 is the structural representation in self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation vertical section of the present invention.

Fig. 3 is the structural representation in self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation sinking watching of the present invention Figure.

Fig. 4 is the structural representation of self-locking head anchor pole of the present invention.

Embodiment

Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate The present invention rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are each to the present invention's The modification of the kind equivalent form of value falls within the application appended claims limited range.

Such as Fig. 1, Fig. 2 and with shown in Fig. 4, a kind of self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, it is special Sign is that it includes tower 1, and tower 1 is connected on ring beam 12 by prestressed bolt 2, and ring beam 12 is located at the top of cylinder 5, cylinder Prestress wire 3 is provided with the wall of body 5, the upper end of prestress wire 3 is connected with end socket short column 13, and platform guardrail 14 is embedded in On end socket short column 13, the bottom of cylinder 5 is provided with bottom plate 6, and the bottom of bottom plate 6 has poured grouting material 8, and sealing water pipe 7 is stuck under bottom plate 6 Portion, garter spring 15 is welded with the inwall of cylinder 5, self-locking head anchor pole 10 is anchored in the anchor hole of the lower end of prestress wire 3;

Gas cell 17 is installed, the periphery of gas cell 17 is enclosed with netting 16, and netting 16 connects with garter spring 15 in described cylinder 5 Connect fixation;

Cylinder 5 is connected with the hydraulic rockshaft 25 on girder steel 27, and girder steel 27 is connected with fife 28, fife 28 It is connected with floating drum 26;

The described top of cylinder 5 is provided with base roof plate 4, and the lower end of prestressed bolt 2 is connected on base roof plate 4, basis top The center of plate 4 offers the circular hole of the taking-up of gas cell 17.

Above-described self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, described self-locking head anchor pole 10 wrap Include self-locking head round platform nut 18, self-locking head overcoat 19, short tube 20 with holes, retainer plate 21, water shutoff plate 22, the He of tool-type push pipe 23 PVC madjack pipes 24;Self-locking head round platform nut 18, self-locking head overcoat 19 and short tube with holes 20 are bolted;Self-locking head round platform Nut 18 is fixed on the bottom of prestress wire 3, thread segment and with holes short tube of the water shutoff plate 22 by bottom by anchorage 20 connections, the lower end of PVC madjack pipes 24, which is penetrated in the reserved hole of water shutoff plate 22, to be fixed;Tool-type push pipe 23 is located at short tube 20 with holes Top, tool-type push pipe 23 are concentric by retainer plate 21 and short tube 20 with holes.

Above-described self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, described girder steel 27 are 4, structure It is rectangular, 2 hydraulic rockshafts 25 are installed, every girder steel 27 connects a fife 28, every horizontal pad on every girder steel 27 Wood 28 connects a floating drum 26.

Embodiment 2

As shown in Figure 1 to Figure 4, a kind of construction method of self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, it is wrapped Include following steps:

A, the support mode on dock, assembling reinforcement, it is close then to bury the following peripheral of cylinder 5 successively from top to bottom in mould The built-in fitting of seal water pipe 7, the built-in fitting of leveling support, the built-in fitting of netting garter spring 15, the lower anchor slab and set of prestressed bolt 2 Pipe, then successively disturbing concrete, maintenance, form removal;

B, leveling support and becket bridle are installed on the surface of cylinder 5, and do paint protection, then the close of the following peripheral of cylinder 5 is installed Seal water pipe 7, the lower section of sealing water pipe 7 glue one layer of foamed plastics that can improve sealing, then install gas cell inside cylinder 5 17, inflation, connect netting 16,4 groups of jack of installation, push pipe and hydraulic pipe;

Outside floating drum 26 is installed, by the cylinder bottom of the connector drum 5 of hydraulic rockshaft 25 on girder steel 27 c,;Open a sluice gate and draw out some water, cylinder Body 5 is floated, the 2~3m of draft of floating drum 26, and with ultrasonic listening seabed flatness, the bottom of floating drum 26 is handled with giant Seabed surface, wash away surface porosity out-of-flatness part;

D, the cylinder 5 hung on floating drum 26 is loosened downwards by hydraulic rockshaft 25, sinks to seabed, do not contact seabed Hovering, gas cell 17 are not deflated;

E, drive 4 push pipes that cylinder 5 is jacked up into 300mm with jack, 60 anchor holes reserved from cylinder 5 insert water under high pressure Rifle, ground at annular bottom surface is washed away, remove loose rubble;

F, retraction jack, and leveling basis, until cylinder 5 contacts and smooth with seabed, high pressure is filled to sealing in water pipe 7 Water, the periphery gap of closed bottom 6, bottom perfusion pea gravel concreten of the anchor hole to cylinder 5 is reserved from cylinder 5, until bottom plate 6 Untill upper reserved spout hole gushes out concrete, 70% design strength is reached after maintenance, the inner inflatable capsule 17 of cylinder 5 is removed, from base Gas cell 17 is taken out in the centre bore of foundation top board 4;The connection of outside floating drum 26 and cylinder 5 is released, measure cylinder 5 top surface absolute altitude becomes Change;

G, from top surface anchor hole down rock drilling, micro- decomposed rock is reached, by prestress wire 3 and tool-type push pipe 23 and PVC Madjack pipe 24 is integrally mounted to be put into anchor hole, stretch-draw prestressing force steel strand wires 3 to design load 50%, makes self-locking head round platform nut 18 On be about to the top of self-locking head overcoat 19 and open, be pressed into rock anchor hole, then the press-in grouting material in the PVC madjack pipes 24, justifies to self-locking head Platform nut 18 and self-locking head overcoat 19 are protected, and this operation is symmetrically carried out in the top circumference of cylinder 5;Grouting material reaches strong After degree, throw formula push pipe 23, it is drawn off;Complete stretch-draw prestressing force steel strand wires 3 are to design load again, and carry out ultra stretching, Finally crimping is fixed;Basic top surface absolute altitude change is determined after all anchor hole tensioning;

H, the top of prestress wire 3, and the platform guardrail 14 that is connected are closed with C60 grouting materials, in periphery geotechnique Cloth bag filling silt is made cylinder 5 and protected, and the inside water-filling of cylinder 5 maintains an equal level with sea level height;

I. the upper anchor slab of the levelling prestressed bolt 2 of C80 grouting materials is used, makes level height difference within 2mm;Then coxopodite is lifted Tower and stretch-draw prestressing force crab-bolt 2, remaining superstructure is then lifted, complete the installation of blower fan unit.

Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (1)

1. a kind of construction method of self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation, it is characterised in that including following Step:
A, the support mode on dock, assembling reinforcement, the sealing of cylinder (5) following peripheral is then buried successively from top to bottom in mould The built-in fitting of water pipe (7), the built-in fitting of leveling support, the built-in fitting of netting garter spring (15), prestressed bolt (2) lower anchor slab and Sleeve pipe, then successively disturbing concrete, maintenance, form removal;
B, leveling support and becket bridle are installed on cylinder (5) surface, and do paint protection, then the close of cylinder (5) following peripheral is installed One layer of foamed plastics that can improve sealing is glued in seal water pipe (7), sealing water pipe (7) lower section, and then installation is filled inside cylinder (5) Air bag (17), inflation, connection netting (16), 4 groups of jack of installation, push pipe and hydraulic pipe;
Outside floating drum (26) c, is installed, by the cylinder bottom of hydraulic rockshaft (25) connector drum (5) on girder steel (27);Open a sluice gate to put Water, cylinder (5) float, floating drum (26) 2~3m of draft, with ultrasonic listening seabed flatness, are handled with giant floating The seabed surface of cylinder (26) bottom, washes away surface porosity out-of-flatness part;
D, the cylinder (5) hung on floating drum (26) is loosened downwards by hydraulic rockshaft (25), sinks to seabed, do not contact sea Bottom is hovered, and gas cell (17) is not deflated;
E, drive 4 push pipes that cylinder (5) is jacked up into 300~400mm with jack, the 60 anchor holes insertion reserved from cylinder (5) Giant, ground at annular bottom surface is washed away, remove loose rubble;
F, retraction jack, and leveling basis, until cylinder (5) contact and smooth with seabed, to sealing, water pipe (7) is interior to fill high pressure Water, the periphery gap of closed bottom (6), bottom perfusion pea gravel concreten of the anchor hole to cylinder (5) is reserved from cylinder (5), directly Untill spout hole is reserved on bottom plate (6) and gushes out concrete, 70% design strength is reached after maintenance, removes and is filled inside cylinder (5) Air bag (17), gas cell (17) is taken out from base roof plate (4) centre bore;Outside floating drum (26) and the connection of cylinder (5) are released, Determine the change of cylinder (5) top surface absolute altitude;
G, from top surface anchor hole down rock drilling, micro- decomposed rock is reached, by prestress wire (3) and tool-type push pipe (23) and PVC Madjack pipe (24) is integrally mounted to be put into anchor hole, stretch-draw prestressing force steel strand wires (3) to design load 50%, makes self-locking head round platform spiral shell It is about to self-locking head overcoat (19) top on female (18) to open, is pressed into rock anchor hole, then the press-in grouting material in PVC madjack pipes (24), Self-locking head round platform nut (18) and self-locking head overcoat (19) are protected, this is symmetrically carried out in cylinder (5) top circumference Operation;After grouting material reaches intensity, throw formula push pipe (23), it is drawn off;Complete stretch-draw prestressing force steel strand wires (3) are extremely again Design load, and ultra stretching is carried out, finally crimping is fixed;Basic top surface absolute altitude change is determined after all anchor hole tensioning;
H, closed with C60 grouting materials at the top of prestress wire (3), and the platform guardrail that is connected (14), in periphery geotechnique Cloth bag filling silt makees cylinder (5) protection, and the internal water-filling of cylinder (5) maintains an equal level with sea level height;
I. the upper anchor slab of the levelling prestressed bolt of C80 grouting materials (2) is used, makes level height difference within 2mm;Then coxopodite tower is lifted Cylinder and stretch-draw prestressing force crab-bolt (2), remaining superstructure is then lifted, complete the installation of blower fan unit.
CN201610292510.XA 2016-05-05 2016-05-05 Self-locking head prestress wire round platform concrete cylinder offshore wind turbine foundation and its construction method CN105756081B (en)

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CN106320360B (en) * 2016-08-31 2018-08-03 江苏金海新能源科技有限公司 Marine rock foundation condition lower prestress self-locking anchor bar reinforces reducing single pile blower foundation and its construction method
CN109137958B (en) * 2018-10-24 2020-09-29 北京天杉高科风电科技有限责任公司 Prestressed marine single-pile foundation and installation method thereof

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GB0206569D0 (en) * 2002-03-20 2002-05-01 Boreas Consultants Ltd Installation platform
CN101230579A (en) * 2008-02-21 2008-07-30 同济大学 Annular bearing bottom plate grillage beam type wind-power generating tower foundation
WO2010093259A2 (en) * 2009-02-13 2010-08-19 Vest Kran Wind Power As Offshore wind turbine
CN102286987B (en) * 2011-07-05 2013-04-03 天津大学 Gravity-type foundation structure for maritime equipment engineering and construction method thereof
CN103807116B (en) * 2014-01-31 2018-06-08 中交一航局第二工程有限公司 Offshore wind turbine drag-line jack lifting mounting device and construction method
CN103758147B (en) * 2014-02-13 2015-12-09 天津大学前沿技术研究院有限公司 A kind of gravity type offshore wind crew base and towage thereof and sinking method
CN104047287A (en) * 2014-05-26 2014-09-17 江苏金海新能源科技有限公司 Prestressed sleeve self-lock anchor rod
CN104790424B (en) * 2015-04-17 2016-07-20 同济大学建筑设计研究院(集团)有限公司 The hardened system on generation power foundation of wind power ring basis and reinforcement means thereof

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