CN103290858A - Composite guyed flanged multi-pile barrel-type foundation structure and construction method thereof - Google Patents
Composite guyed flanged multi-pile barrel-type foundation structure and construction method thereof Download PDFInfo
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- CN103290858A CN103290858A CN2013102175330A CN201310217533A CN103290858A CN 103290858 A CN103290858 A CN 103290858A CN 2013102175330 A CN2013102175330 A CN 2013102175330A CN 201310217533 A CN201310217533 A CN 201310217533A CN 103290858 A CN103290858 A CN 103290858A
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Abstract
The invention discloses a composite guyed flanged multi-pile barrel-type foundation structure and a construction method thereof. A plurality of single-pile foundations with flange plates are evenly distributed around a barrel-type foundation, and guys are connected among the single-pile foundations and a transition section via guy fixing devices. The construction method includes: transporting the barrel-shaped foundation and the single-pile foundations to an installation site and mounting the same in place respectively, mounting two ends of each guy on the guy fixing devices on the transition section and the single-pile foundations respectively, and performing pre-tensioning. Vertical load, horizontal load and bending torque of an upper fan are transmitted by the barrel-type foundation, parts of the horizontal load and the bending torque are borne by the single-pile foundations, stresses are clear, bending resistance is improved, barrel size and buried depth of the barrel-type foundation can be effectively reduced, bearing capability of the single-pile foundations is improved by the flange plates, and material cost is further lowered; since single piles are less in piling quantity and small in pile diameters, the composite guyed flanged multi-pile barrel-type foundation structure is simple to construct and short in construction period, and material cost and construction cost can be lowered greatly.
Description
Technical field
The present invention relates to the foundation structure of building field, specifically, relate to a kind of bucket foundation and many pile foundations combination stressed foundation structure and job practices thereof.
Background technology
The offshore wind farm structure belongs to that vertical load is less relatively, horizontal loading and the bigger marine tall and slender structure of moment of flexure, and resistance to capsizing requires high.At present, the structural shape of offshore wind power unit foundation employing is generally single pile basis, many pile foundations, gravity type foundation.
The single pile basis is common offshore wind farm base form, and its simple in structure, stressed mechanism is clear and definite, is used for the following wind energy conversion system better economy of 1.5MW.Yet, because the single pile basis exists that resistance to capsizing is poor, level is to weakness such as displacement are big, along with the offshore wind turbine single-machine capacity is increased to 3MW, 5MW or bigger, must cause diameter, wall thickness and the depth of penetration on single pile basis sharply to increase, cause the marine guidance piling constructional difficulties, construction cost significantly raises.Many pile foundations can be disperseed load effectively, improve resistance to capsizing, but structure and construction technology complexity require height to sea conditions, cause long construction period, construction cost height.The bucket foundation speed of application is fast, but for bigger resistance to capsizing is provided, the diameter of bucket foundation is bigger, and construction cost is higher.
Adopt above traditional offshore wind farm unit foundation structure, its foundation construction cost and offshore construction are with high costs, cause the more land basis of investment cost of offshore wind power unit foundation to increase considerably, thereby have limited the development of offshore wind farm.
Summary of the invention
What the present invention will solve is that offshore wind farm unit foundation structure is built and the high technical problem of marine cost, a kind of many bucket foundation composite constructions in the drag-line band edge of a wing and job practices thereof by bucket foundation and the combination of a plurality of single pile is provided, with single pile basis and the effective combination of bucket foundation, bring into play its advantage separately, realize with less bucket foundation barrel dliameter and less single pile stake number and stake footpath, reach load bearing requirements, and then reduce offshore construction cost and material cost, accelerate speed of application.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
Many the bucket foundation composite constructions in a kind of drag-line band edge of a wing, comprise that the top is fixedly connected with the bucket foundation of changeover portion, described changeover portion is used for being connected with blower fan tower barrel, be evenly equipped with many single pile bases around the described bucket foundation, the frange plate that is provided with of mud pile cutoff outside symmetry is gone on described single pile basis, be connected with drag-line between described single pile basis and the described changeover portion, one end of described drag-line is fixed in described changeover portion by the drag-line fastening devices, and the other end is fixed in top, described single pile basis by the drag-line fastening devices.
The quantity of described drag-line and described single pile is 3～8.
Described drag-line angle with respect to the horizontal plane is 0 °～60 °.
Described drag-line is wherein a kind of of cable wire, steel wire or steel strand.
Described drag-line fastening devices is positioned on the horizontal plane.
Described drag-line fastening devices is a kind of in intermediate plate ground tackle, heading ground tackle, the thread anchorage.
The quantity of described frange plate is 1～6.
Every described single pile corresponding drag-line in basis and on it angle between any frange plate greater than 0 °, less than 180 °.
The job practices of many bucket foundation composite constructions in a kind of drag-line band edge of a wing comprises the steps:
(1) prefabricated top is fixedly connected with bucket foundation and the Duo Gen single pile basis of changeover portion, the outside, every described single pile basis symmetry frange plate is set; The setting drag-line fastening devices identical with described single pile basis quantity that described changeover portion is uniform arranges the drag-line fastening devices respectively on the every described single pile basis;
(2) described bucket foundation and the described single pile of Duo Gen basis are transported to the infield;
(3) location, infield;
(4) utilize deadweight to sink and negative pressure sinking in place and leveling with described barrel-shaped foundation sinking;
(5) with many described single pile basis difference installation in position;
(6) with the described drag-line fastening devices on the described changeover portion as fixed end, the described drag-line fastening devices on the described single pile basis is carried out pre-stretch-draw as the stretch-draw end to drag-line.
Changeover portion all is delivered to bucket foundation with the vertical load of top wind-powered electricity generation unit transmission, and with the bucket foundation that is delivered to of the horizontal loading of top wind-powered electricity generation unit transmission and moment of flexure part, most of horizontal loading and moment of flexure are delivered to described single pile basis by the drag-line pulling force.The drag-line pulling force is mainly born on the single pile basis, because the arm of force of drag-line pulling force is very big, has very strong bending resistance square ability, so single pile Base Design size is compared traditional single pile wind-powered electricity generation basis and reduced greatly.By mud is gone on the single pile basis frange plate is set partly, with the contact area of increase pile body and the soil body, thereby improve horizontal bearing capacity and the uplift resistance on single pile basis, so the use of frange plate can reduces total material usage of pile body greatly.Because the drag-line pulling force has been resisted most of horizontal force and moment of flexure on the changeover portion, the load that makes changeover portion be delivered to the bucket foundation place is mainly vertical load, thereby the horizontal movement that is positioned at the wind-powered electricity generation structure on bucket foundation top also significantly reduces, simultaneously owing to the load bearing requirements to bucket foundation reduces greatly, the bucket foundation design size is corresponding to be reduced, and has reduced material cost and construction cost.
The invention has the beneficial effects as follows:
Many the bucket foundation composite constructions in the drag-line band of the present invention edge of a wing are new structure that bucket foundation and single pile basis are combined, and more independent single pile basis or the bucket foundation of its integral rigidity, anti-horizontal loading and moment of flexure ability all improves a lot.
Many the bucket foundation composite constructions in the drag-line band of the present invention edge of a wing have taken full advantage of the bucket foundation easy construction, vertical bearing capacity is good and single pile foundation level bearing capacity height, stressed clear and definite, soil layer are suitable for advantages such as ability is strong; Single pile basis around by the drag-line pulling force horizontal force of top wind-powered electricity generation unit transmission and moment of flexure being delivered to, effectively realize reducing the moment load that wind-powered electricity generation unit load produces bucket foundation, reduce the horizontal movement of bucket foundation top wind-powered electricity generation structure, and reduced the cylinder-shaped foundation structure size greatly, reduced material cost; Because the arm of force of drag-line pulling force is very big between single pile basis and the changeover portion, has very strong bending resistance square ability, so the physical dimension on single pile basis compares traditional single pile wind-powered electricity generation basis and reduces greatly, and material cost is significantly reduced, and construction technology is also more simple; Frange plate is set to improve the supporting capacity on single pile basis by the single pile basis being gone into the mud pile cutoff simultaneously, material cost is further reduced.In addition, be distributed in bucket foundation single pile basis all around and possess the fender pile function, can protect the wind-powered electricity generation unit to avoid being subjected to ship collision.
The drag-line band of the present invention edge of a wing many bucket foundation composite constructions job practices has mainly comprised the installation of bucket foundation and pile foundation and the stretch-draw of drag-line, taken full advantage of bucket foundation easy construction advantage efficiently, simultaneously because the footpath of the single pile stake in many bucket foundation composite constructions of drag-line is little, the stake number is few, than offshore wind turbine single pile basis for offshore construction machinery require low, greatly reduce difficulty of construction and construction cost, than the many pile foundations that are widely used in offshore wind farm at present, construction technology is simple, can shorten construction period greatly.
Description of drawings
Fig. 1 is the front view of many bucket foundation composite constructions in the drag-line band provided by the present invention edge of a wing;
Fig. 2 is the vertical view of many bucket foundation composite constructions in the drag-line band provided by the present invention edge of a wing;
Fig. 3 is the perspective view of many bucket foundation composite constructions in the drag-line band provided by the present invention edge of a wing.
Among the figure: 1, bucket foundation; 2, single pile basis; 3, changeover portion; 4, drag-line; 5, drag-line fastening devices; 6, support floor; 7, frange plate.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
As shown in Figure 1 to Figure 3, present embodiment has disclosed many bucket foundation composite constructions in a kind of drag-line band edge of a wing, mainly comprises bucket foundation 1, single pile basis 2, changeover portion 3, drag-line 4 and drag-line fastening devices 5.Wherein bucket foundation 1 is concrete cylindrical basis or steel bucket foundation; Changeover portion 3 is concrete changeover portion or steel changeover portion, and is cylinder or the cone coaxial with bucket foundation 1; Drag-line 4 is cable wire, steel wire or steel strand, and is in tension state; Drag-line fastening devices 5 is intermediate plate ground tackle, heading ground tackle, thread anchorage etc., provides effective restraint forces after drag-line 4 stretch-draw.
Among this embodiment, construction marine site mean depth 10m, extreme high water level elevation 2.4m.Bucket foundation 1 is that diameter is 15m, highly is 8m, and top cover and sidewall thickness are the steel work of 20mm.Bucket foundation is set with changeover portion 3 on 1 top, and changeover portion 3 is coaxial with bucket foundation 1.Changeover portion 3 is that external diameter is 5m, and wall thickness is 40mm, highly is the steel work of 22.5m.Be provided with several between bucket foundation 1 and the changeover portion 3 and support floor 6, support around load that floor 6 is delivered to bucket foundation 1 with top changeover portion 3 is distributed to.Changeover portion 3 circumferentially arranges four drag-line fastening devicess 5 equably apart from above 21m place, bucket foundation 1 top.
In addition, the angle on every single pile basis 2 corresponding drag-lines 4 and this single pile basis 2 between any frange plate 7 greater than 0 °, less than 180 °, that is to say that drag-line 4 is not on the plane at any frange plate 7 places; Its reason is that the soil body on drag-line 4 directions is bigger owing to being disturbed, and soil strength and friction factor reduce, and when frange plate 7 was consistent with drag-line 4 directions, the frictional force that 7 of frange plates can provide reduced, thereby causes bearing capacity to reduce.
The job practices of many bucket foundation composite constructions in the drag-line band edge of a wing of present embodiment is as follows:
(1) first prefabricated bucket foundation 1 and four single pile bases 2 that are provided with changeover portion 3, wherein the outside, every single pile basis symmetry arranges four blocks of frange plates 7; Simultaneously uniform on changeover portion 3 four drag-line fastening devicess 5 are set, drag-line fastening devices 5 is set respectively on the single pile basis 2;
(2) will fixedly there be bucket foundation 1 inflation transportation by driving or the boats and ships of changeover portion 3 to haul to the infield, single pile basis 2 will be hauled to the infield;
(3) location, infield;
(4) bleed off gas in the bucket foundation 1, utilize deadweight to sink it is sunk to below the mud face, bucket foundation 1 is drawn water, make the bucket foundation 1 inside and outside pressure differential that forms, utilize pressure differential to finish the further sinking on fitted tube type basis 1, and leveling;
(5) finish the installation on four single pile bases 2;
(6) with the drag-line fastening devices 5 on the changeover portion 3 as fixed end, the drag-line fastening devices 5 on the single pile basis 2 is carried out pre-stretch-draw as the stretch-draw end to drag-line 4.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make the concrete conversion of a lot of forms, these all belong within protection scope of the present invention.
Claims (9)
1. many bucket foundation composite constructions in a drag-line band edge of a wing, comprise that the top is fixedly connected with the bucket foundation of changeover portion, described changeover portion is used for being connected with blower fan tower barrel, it is characterized in that, be evenly equipped with many single pile bases around the described bucket foundation, the frange plate that is provided with of mud pile cutoff outside symmetry is gone on described single pile basis, be connected with drag-line between described single pile basis and the described changeover portion, one end of described drag-line is fixed in described changeover portion by the drag-line fastening devices, and the other end is fixed in top, described single pile basis by the drag-line fastening devices.
2. many bucket foundation composite constructions in a kind of drag-line band edge of a wing according to claim 1 is characterized in that the quantity of described drag-line and described single pile is 3～8.
3. many bucket foundation composite constructions in a kind of drag-line band edge of a wing according to claim 1 is characterized in that described drag-line angle with respect to the horizontal plane is 0 °～60 °.
4. many bucket foundation composite constructions in a kind of drag-line band edge of a wing according to claim 1 is characterized in that, described drag-line is wherein a kind of of cable wire, steel wire or steel strand.
5. many bucket foundation composite constructions in a kind of drag-line band edge of a wing according to claim 1 is characterized in that described drag-line fastening devices is positioned on the horizontal plane.
6. many bucket foundation composite constructions in a kind of drag-line band edge of a wing according to claim 1 is characterized in that, described drag-line fastening devices is a kind of in intermediate plate ground tackle, heading ground tackle, the thread anchorage.
7. many bucket foundation composite constructions in a kind of drag-line band edge of a wing according to claim 1 is characterized in that the quantity of described frange plate is 1～6.
8. many bucket foundation composite constructions in a kind of drag-line band edge of a wing according to claim 1 is characterized in that, every described single pile corresponding drag-line in basis and on it angle between any frange plate greater than 0 °, less than 180 °.
9. the job practices as many bucket foundation composite constructions in the drag-line band edge of a wing as described in the claim 1-8 is characterized in that, comprises the steps:
(1) prefabricated top is fixedly connected with bucket foundation and the Duo Gen single pile basis of changeover portion, the outside, every described single pile basis symmetry frange plate is set; The setting drag-line fastening devices identical with described single pile basis quantity that described changeover portion is uniform arranges the drag-line fastening devices respectively on the every described single pile basis;
(2) described bucket foundation and the described single pile of Duo Gen basis are transported to the infield;
(3) location, infield;
(4) utilize deadweight to sink and negative pressure sinking in place and leveling with described barrel-shaped foundation sinking;
(5) with many described single pile basis difference installation in position;
(6) with the described drag-line fastening devices on the described changeover portion as fixed end, the described drag-line fastening devices on the described single pile basis is carried out pre-stretch-draw as the stretch-draw end to drag-line.
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| CN2013102175330A CN103290858A (en) | 2013-05-31 | 2013-05-31 | Composite guyed flanged multi-pile barrel-type foundation structure and construction method thereof |
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| CN2013102175330A CN103290858A (en) | 2013-05-31 | 2013-05-31 | Composite guyed flanged multi-pile barrel-type foundation structure and construction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018515A (en) * | 2014-06-13 | 2014-09-03 | 江苏省电力设计院 | Transmission line assembly type steel structure sandbox gravity type foundation in desert areas |
| CN110397067A (en) * | 2019-06-28 | 2019-11-01 | 天津大学 | A kind of more steel reinforced concrete combination foundation structures and its construction method with support construction |
| CN115404927A (en) * | 2022-05-25 | 2022-11-29 | 水利部交通运输部国家能源局南京水利科学研究院 | Anti-overturning capacity lifting device and lifting method for offshore wind power barrel type foundation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768978A (en) * | 2010-01-29 | 2010-07-07 | 天津大学 | At-sea wind generation unit foundation formed by barrel type foundation and mooring rope anchor |
| CN102877479A (en) * | 2012-09-11 | 2013-01-16 | 天津大学 | Foundation structure for uplift pile |
| CN203320541U (en) * | 2013-05-31 | 2013-12-04 | 天津大学 | Guyed flanged multi-pile and bucket foundation composite structure |
-
2013
- 2013-05-31 CN CN2013102175330A patent/CN103290858A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768978A (en) * | 2010-01-29 | 2010-07-07 | 天津大学 | At-sea wind generation unit foundation formed by barrel type foundation and mooring rope anchor |
| CN102877479A (en) * | 2012-09-11 | 2013-01-16 | 天津大学 | Foundation structure for uplift pile |
| CN203320541U (en) * | 2013-05-31 | 2013-12-04 | 天津大学 | Guyed flanged multi-pile and bucket foundation composite structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018515A (en) * | 2014-06-13 | 2014-09-03 | 江苏省电力设计院 | Transmission line assembly type steel structure sandbox gravity type foundation in desert areas |
| CN110397067A (en) * | 2019-06-28 | 2019-11-01 | 天津大学 | A kind of more steel reinforced concrete combination foundation structures and its construction method with support construction |
| CN110397067B (en) * | 2019-06-28 | 2024-03-08 | 天津大学 | Multi-cylinder reinforced concrete combined foundation structure with supporting structure and construction method thereof |
| CN115404927A (en) * | 2022-05-25 | 2022-11-29 | 水利部交通运输部国家能源局南京水利科学研究院 | Anti-overturning capacity lifting device and lifting method for offshore wind power barrel type foundation |
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Application publication date: 20130911 |