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CN104389318A - Reinforced concrete-steel structure hybrid gravity foundation for offshore wind power and construction method thereof - Google Patents

Reinforced concrete-steel structure hybrid gravity foundation for offshore wind power and construction method thereof Download PDF

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Publication number
CN104389318A
CN104389318A CN201410633320.0A CN201410633320A CN104389318A CN 104389318 A CN104389318 A CN 104389318A CN 201410633320 A CN201410633320 A CN 201410633320A CN 104389318 A CN104389318 A CN 104389318A
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Prior art keywords
steel
foundation
offshore wind
caisson base
concrete
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CN201410633320.0A
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Chinese (zh)
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CN104389318B (en
Inventor
熊翱
张锐
温文峰
潘晓亮
尤毅
严志娟
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Guangzhou Huashen Engineering Management Co ltd
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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
    • E02D27/42Foundations for poles, masts or chimneys
    • E02D27/425Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/18Foundations formed by making use of caissons
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/52Submerged foundations, i.e. submerged in open water
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0004Synthetics
    • E02D2300/0018Cement used as binder
    • E02D2300/002Concrete
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0026Metals
    • E02D2300/0029Steel; Iron

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Foundations (AREA)
  • Wind Motors (AREA)

Abstract

The invention discloses a reinforced concrete-steel structure hybrid gravity foundation for offshore wind power. The reinforced concrete-steel structure hybrid gravity foundation comprises a caisson base and an upper steel support structure, wherein the caisson base has a gravity type reinforced concrete cavity structure; the steel support structure is fixed on the caisson base; the top end of the steel support structure is provided with a foundation ring which is connected with a fan tower; the caisson base and/or the steel support structure is provided with an irrigation channel which is communicated to the cavity of the caisson base. The invention further discloses a construction method of the reinforced concrete-steel structure hybrid type gravity foundation for offshore wind power. Compared with an ordinary jacket and single pile foundation, the reinforced concrete-steel structure hybrid gravity foundation has the advantages that the advantages of a reinforced concrete structure and a steel structure are combined organically; the reinforced concrete cavity structure is taken as a foundation base, and the steel structure is taken as an upper support structure; a pile foundation is not required; the foundation is made on the land, is assembled integrally, and can be transported by means of semi-submersible barge or the own buoyance. The reinforced concrete-steel structure hybrid gravity foundation is easy and convenient for construction, is shorter in the construction period, is economical, and has a wide application prospect in an offshore wind power project.

Description

For steel concrete-steel structure mixing gravity type foundation and the construction method thereof of offshore wind farm
Technical field
The invention belongs to the technical field of offshore wind power foundation engineering, be specifically related to a kind of steel for offshore wind farm concrete-steel structure mixing gravity type foundation and construction method thereof.
Background technology
Offshore wind power foundation engineering is because at sea constructing, large by effect of natural conditions, and operating mode is comparatively severe, have scene can the construction operation time short, difficulty of construction large, the feature such as at the bottom of efficiency.
At present, jacket and single large diameter steel pipe pile are the base_structure types that offshore wind farm is conventional.Jacket is steel truss structure, has that rigidity is large, good stability, the advantage such as comparatively to save with material.But jacket is using pile foundation as supporting construction, pile foundation construction needs pile follower under water, and difficulty of construction is comparatively large, high to equipment requirement; When adopt the construction technology of jacket is installed after first pile sinking time, it is quite difficult that jacket installs contraposition under water; If during the embedding rock of pile foundation need, not only difficulty of construction is large, long construction period, and engineering cost is also quite high.
The form of structure of single large diameter steel pipe pile is simple, and speed of application is fast, and aquatic work amount is little.But single pile structure section is large, wall thickness large, from great, rolled steel dosage is large, and require higher to lifting, pile driving equipment, operating expenses is higher; In addition, single pile structure is not adapted at the area needing the embedding rock construction of pile foundation at present, because Big-Diameter Rock-Embedded Pile difficulty of construction is large, and construction machinery is little, and operating expenses is very high.
Above-mentioned discussion content object be to reader introduce may to below by the various aspects of technology relevant for the various aspects of the present invention be described and/or advocate, believe that this discussion content contributes to for reader with background's information, to be conducive to understanding content of the present invention better.
Summary of the invention
The object of the invention is to avoid deficiency of the prior art and a kind of steel for offshore wind farm concrete-steel structure mixing gravity type foundation and construction method thereof are provided, it is without the need to pile foundation of constructing, basis is integral manufacturing by land, convenient construction, save the duration, overall economics is good, is applicable to basement rock and buries more shallow marine site.
In order to overcome prior art deficiency, the technical solution used in the present invention is: provide a kind of steel for offshore wind farm concrete-steel structure mixing gravity type foundation, comprise the steel supporting construction on caisson base and top, described caisson base is gravity steel bar concrete cavity structure, described steel supporting construction is fixed on caisson base, steel supporting construction top is provided with the discharge ring be connected with blower fan tower barrel, described caisson base and/or steel supporting construction is provided with the passage of pouring water of the cavity being communicated to described caisson base.
Wherein, described steel supporting construction is jacket, and caisson base is provided with the supporting leg firm banking corresponding with the supporting leg of jacket, described supporting leg is fixed on supporting leg fixed bearing.
Wherein, the lower end of described supporting leg is embedded in the inside of supporting leg firm banking, or described supporting leg is connected with the pre-buried steel Member Welding on supporting leg firm banking top.
Wherein, described in passage of pouring water be made up of the endoporus of the irrigation pipe on the wall being arranged on described caisson base and supporting leg, described irrigation pipe one end and cavity connects, the other end is communicated with the endoporus lower end of supporting leg.
Wherein, described steel supporting construction is single large diameter steel pipe, and the top cover central authorities of caisson base are provided with steel pipe firm banking, and the lower end of described large diameter steel pipe is embedded in steel pipe firm banking.
Wherein, described in passage of pouring water be made up of the endoporus of described large diameter steel pipe, the endoporus lower end of large diameter steel pipe and the cavity connects of described caisson base.
Wherein, described caisson base is circular or regular polygon caisset, and its top cover is tapered slope or sphere curved surface, and/or, described caisson base is provided with ribs.
Wherein, the base plate of described caisson base is provided with the bedding grout hole that can close or take apart, and bedding grout hole upper end is connected to reserved grouting conduit; And/or the top cover of described caisson base is provided with the backfill hole that can close or take apart.
Present invention also offers the construction method of a kind of steel for offshore wind farm concrete-steel structure mixing gravity type foundation, comprise the steps:
S1, factory process make band discharge ring steel supporting construction, land fabrication caisson base, and by steel supporting construction and caisson base composition overall structure;
S2, the ground of offshore wind power foundation is carried out dredging etc. process, form the bedding reaching preset planeness;
S3, envelope storehouse is carried out to the reserved backfill hole of caisson base, bedding grout hole, and/or, plug-in floating gasbag, the lower water in basis, utilizes half buoyancy of diving barge or dependence foundation structure self that basis is transported to scene by crane ship and tugboat;
S4, half dives and refutes to sink to hauling out foundation structure location or directly by after transportation by driving to on-the-spot foundation structure location, and through pouring water, passage to be poured water sinking basis to caisson base cavity inside, and basis is accurately seated on bedding;
S5, in caisson base chamber, fill with sand or rubble by the reserved backfill hole of top cover or large diameter steel pipe;
S6, the tower cylinder of offshore wind farm unit is installed by the discharge ring at steel supporting construction top.
Wherein, between step S4 and S5, reserved grout pipe is utilized to carry out pressure grouting to bedding by the grout hole that base plate is arranged.
Beneficial effect of the present invention: the advantage of reinforced concrete structure and steel work combines by this foundation structure, using steel bar concrete cavity structure as the sole plate that can certainly float, steel work as upper support structure, without the need to pile foundation of constructing, avoid the working procedure that pile foundation pile sinking, embedding rock etc. are numerous and diverse.Whole basis makes assembling by land, good integrity, can dive by half and refute or rely on natural buoyancy to transport, without the need to large-scale crane ship, just can sinking install after only need excavating ground top layer weak soil and construction bedding, Contraction in Site is simple, technical maturity, difficulty of construction is less, and the duration economizes, and is applicable to bearing stratum and buries more shallow sea area.In a word, this foundation structure batch production degree is high, integration good, simple and easy quick, good economy performance of constructing, and has broad application prospects in ocean engineering.
Accompanying drawing explanation
The invention will be further described to utilize accompanying drawing, but the embodiment in accompanying drawing does not form any limitation of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other accompanying drawing according to the following drawings.
Fig. 1 is the structural representation of the steel concrete-steel structure mixing gravity type foundation embodiment one for offshore wind farm.
Fig. 2 is A-A schematic cross-section in Fig. 1.
Fig. 3 is B-B schematic cross-section in Fig. 2.
Fig. 4 is the structural representation of the steel concrete-steel structure mixing gravity type foundation embodiment two for offshore wind farm.
Fig. 5 is C-C schematic cross-section in Fig. 4.
Fig. 6 is D-D schematic cross-section in Fig. 5.
Detailed description of the invention
Technical scheme of the present invention is understood better in order to make those skilled in the art, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Core of the present invention is to provide a kind of steel for offshore wind farm concrete-steel structure mixing gravity type foundation and construction method thereof, and its batch production degree is high, integration good, simple and easy quick, good economy performance of constructing.
As shown in Figure 1, 2, 3, a kind of concrete of the steel for offshore wind farm-steel structure mixing gravity type foundation that the embodiment of the present invention one provides, comprise the caisson base 11 of bottom and the steel supporting construction on top, steel supporting construction is jacket 13, jacket 13 is steel truss structure, has multiple supporting leg 16.Caisson base 11 is gravity steel bar concrete cavity structure, can be circle or regular polygon, the supporting leg firm banking 17 corresponding with the supporting leg 16 of jacket 13 is provided with inside the outer wall 22 of caisson base 11, jacket 13 is connected and fixed on caisson base 11 by supporting leg 16 and supporting leg firm banking 17, and the top of jacket 13 is provided with the discharge ring 15 be connected with blower fan tower barrel.
As preferred embodiment, the lower end of the supporting leg 16 of jacket 13 is embedded in the inside of supporting leg firm banking 17, and caisson base 11 is fixedly connected with jacket 13.Or supporting leg 16 is connected with the pre-buried steel Member Welding on supporting leg firm banking 17 top, be convenient to caisson base 11 and jacket 13 separately making like this, secondary is assembled.Above-mentioned two kinds of fixed forms all have irrigation pipe 18 that supporting leg 16 endoporus and caisson base 11 cavity connects are formed passage of pouring water, and are convenient to caisson base 11 sunk type and pour water.
As preferred embodiment, the top cover 21 of caisson base 11 can be tapered slope or sphere curved surface, and top cover 21 central authorities are reserved can be closed and the backfill hole 24 of taking apart, Cast-in-situ Piles in Sand-filling building stones after the installation of convenient basis.
As preferred embodiment, the band toe base plate 23 of described caisson base 11, outer wall 22, top cover 21 are provided with ribs 19, to strengthen intensity, the rigidity of caisson base 11 in the side near cavity.
As preferred embodiment, the base plate 23 of described caisson base 11 is provided with closed bedding grout hole 20, bedding grout hole 20 upper end is connected to reserved grouting conduit, and grouting conduit upper end extends on the water surface.After basis is installed, take grout hole 20 apart, by reserved grouting conduit, utilize pressure to be filled into the bedding under base plate 23 more than the water surface by grouting agent (cement paste), to improve globality and the stability of bedding.
As shown in Figure 4,5, 6, the another kind that the embodiment of the present invention two provides, for the steel concrete-steel structure mixing gravity type foundation of offshore wind farm, comprises caisson base 11 and the top steel supporting construction of bottom.The large diameter steel pipe 14 that steel supporting construction is, caisson base 11 is gravity steel bar concrete cavity structure, can be circle or regular polygon, its top cover 21 is tapered slope, the lower end of large diameter steel pipe 14 is embedded within the steel pipe firm banking 26 of top cover 21 central authorities, top cover 21 and steel pipe firm banking 26 can be steel bar concrete or prestressed reinforced concrete, and the top of large diameter steel pipe 14 is provided with the discharge ring 15 be connected with blower fan tower barrel.
As preferred embodiment, the band toe base plate 23 of described caisson base 11, outer wall 22, top cover 21 are provided with ribs 19, to strengthen the intensity of foundation structure.
As preferred embodiment, the base plate 23 of described caisson base 11 is provided with closed bedding grout hole 20, after can meeting basis installation, bedding is carried out to the needs of pressure grouting.
The conveniently lifting of crane ship, all presets shackle plate or suspension ring in above-mentioned two kinds of embodiments on caisson base 11.
In order to implement the concrete of the steel for offshore wind farm for offshore wind farm-steel structure mixing gravity type foundation as shown in Figures 1 to 6, the embodiment of the present invention additionally provides a kind of construction method, comprises the steps:
S1, make the steel supporting construction of band discharge ring 15 in factory process, land fabrication caisson base 11, and steel supporting construction and caisson base 11 are formed overall structure;
S2, the ground of wind power foundation is carried out dredging etc. process, form the bedding 25 of preset planeness;
S3, envelope storehouse is carried out to the reserved backfill hole 24 of foundation structure, bedding grout hole 20, and/or, plug-in floating gasbag, the lower water in basis, utilizes half to dive barge or rely on self buoyancy basic that basis is transported to scene by crane ship and tugboat;
S4, half dives and refutes to sink to hauling out foundation structure location or directly by after transportation by driving to on-the-spot foundation structure location, and through pouring water, passage to be poured water sinking basis to caisson base cavity inside, makes basis accurately be seated on bedding 25;
S5, in caisson base 11 chamber, fill with sand or rubble by the reserved backfill hole 24 of top cover or large diameter steel pipe 14;
S6, the tower cylinder of offshore wind farm unit is installed by the discharge ring 15 at steel supporting construction top.
Wherein, after step s4, before step S5, if needed, after basis is installed, take grout hole 20 apart, by reserved grouting conduit, pressure is utilized to be filled into the bedding 25 under base plate 23 more than the water surface by grouting agent (cement paste), to improve globality and the stability of bedding.
Set forth a lot of detail in description above so that fully understand the present invention, but the present invention can also adopt other to be different from other similar fashion described here and implement, and therefore, can not be interpreted as limiting the scope of the invention.
In a word; those skilled in the art although the present invention illustrates above-mentioned preferred embodiment, should illustrate, although can carry out various change and remodeling; unless such change and remodeling substantially deviate from scope of the present invention, otherwise all should be included in protection scope of the present invention.

Claims (10)

1. the concrete of the steel for offshore wind farm-steel structure mixing gravity type foundation, it is characterized in that: the steel supporting construction comprising caisson base (11) and top, described caisson base (11) is gravity steel bar concrete cavity structure, described steel supporting construction is fixed on caisson base (11), steel supporting construction top is provided with the discharge ring (15) be connected with blower fan tower barrel, described caisson base (11) and/or steel supporting construction is provided with the passage of pouring water of the cavity being communicated to described caisson base (11).
2. the concrete of the steel for offshore wind farm according to claim 1-steel structure mixing gravity type foundation, it is characterized in that: described steel supporting construction is jacket (13), caisson base (11) is provided with the supporting leg firm banking (17) corresponding with the supporting leg of jacket (13) (16), described supporting leg (16) is fixed on supporting leg fixed bearing (17).
3. the concrete of the steel for offshore wind farm according to claim 2-steel structure mixing gravity type foundation, it is characterized in that: the lower end of described supporting leg (16) is embedded in the inside of supporting leg firm banking (17), or described supporting leg (16) is connected with the pre-buried steel Member Welding on supporting leg firm banking (17) top.
4. the concrete of the steel for offshore wind farm according to claim 2-steel structure mixing gravity type foundation, it is characterized in that: described in passage of pouring water be made up of the endoporus of the irrigation pipe (18) on the wall being arranged on described caisson base (11) and supporting leg (16), described irrigation pipe (18) one end and cavity connects, the other end is communicated with the endoporus lower end of supporting leg (16).
5. the concrete of the steel for offshore wind farm according to claim 1-steel structure mixing gravity type foundation, it is characterized in that: described steel supporting construction is single large diameter steel pipe (14), top cover (21) central authorities of caisson base (11) are provided with steel pipe firm banking (26), and the lower end of described large diameter steel pipe (14) is embedded in steel pipe firm banking (26).
6. the concrete of the steel for offshore wind farm according to claim 5-steel structure mixing gravity type foundation, it is characterized in that: described in passage of pouring water be made up of the endoporus of described large diameter steel pipe (14), the endoporus lower end of large diameter steel pipe (14) and the cavity connects of described caisson base (11).
7. the concrete of the steel for offshore wind farm according to any one of claim 1 to 6-steel structure mixing gravity type foundation, it is characterized in that: described caisson base (11) is circular or regular polygon caisset, its top cover (21) is tapered slope or sphere curved surface, and/or, described caisson base (11) is provided with ribs (19).
8. the concrete of the steel for offshore wind farm according to any one of claim 1 to 6-steel structure mixing gravity type foundation, it is characterized in that: the base plate (23) of described caisson base (11) is provided with the bedding grout hole (20) that can close or take apart, and bedding grout hole (20) upper end is connected to reserved grouting conduit; And/or the top cover (21) of described caisson base (11) is provided with the backfill hole (24) that can close or take apart.
9., for a construction method for the steel concrete-steel structure mixing gravity type foundation of offshore wind farm, it is characterized in that, comprise the steps:
S1, factory process make band discharge ring (15) steel supporting construction, land fabrication caisson base (11), and by steel supporting construction and caisson base (11) composition overall structure;
S2, the ground of offshore wind power foundation is carried out dredging etc. process, form the bedding (25) reaching preset planeness;
S3, envelope storehouse is carried out to the reserved backfill hole (24) of caisson base (11), bedding grout hole (20), and/or, plug-in floating gasbag, water under foundation structure, by crane ship and tugboat, and utilization half is dived, basis is transported to scene by the buoyancy of barge or dependence foundation structure self;
S4, partly latent refuting sink to hauling out foundation structure location or direct by behind foundation structure extremely on-the-spot for transportation by driving location, through pouring water, passage to be poured water sinking basis to caisson base (11) cavity inside, makes basis accurately be seated on bedding (25);
S5, in caisson base (11) chamber, fill with sand or rubble by the reserved backfill hole (24) of top cover or large diameter steel pipe (14);
S6, the tower cylinder of offshore wind farm unit is installed by the discharge ring (15) at steel supporting construction top.
10. the construction method of the concrete of the steel for offshore wind farm according to claim 9-steel structure mixing gravity type foundation, it is characterized in that: between step S4 and S5, utilize reserved grout pipe to carry out pressure grouting to bedding (25) by the grout hole (20) that base plate is arranged.
CN201410633320.0A 2014-11-11 2014-11-11 Reinforced concrete-steel structure hybrid gravity foundation for offshore wind power and construction method thereof Active CN104389318B (en)

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CN105201008A (en) * 2015-07-22 2015-12-30 清华大学 Pin type bending-resistant longitudinal connection joint and construction method thereof
CN105401590A (en) * 2015-11-20 2016-03-16 国家电网公司 Foundation structure used for steel tube tower installation and provided with tube protection channel and preparation method of foundation structure
CN106049525A (en) * 2016-07-27 2016-10-26 天津大学 Polygonal offshore wind power barrel-shaped foundation
CN106638659A (en) * 2016-10-27 2017-05-10 中国电建集团华东勘测设计研究院有限公司 Towing truss-gravity type combined offshore wind turbine foundation structure and construction method thereof
CN109235479A (en) * 2018-09-21 2019-01-18 中交航局第二工程有限公司 Large-tonnage pier and its prefabricated and floatation type dock construction method
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
CN110439018A (en) * 2019-08-02 2019-11-12 中交第四航务工程勘察设计院有限公司 A kind of new plug-in steel cylinder wind power foundation
CN111764394A (en) * 2020-07-06 2020-10-13 华电重工股份有限公司 Installation method of cylindrical foundation
CN112962650A (en) * 2021-03-19 2021-06-15 杨帅 Pile foundation reinforcing device for highway bridge detection

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105201008A (en) * 2015-07-22 2015-12-30 清华大学 Pin type bending-resistant longitudinal connection joint and construction method thereof
CN105201008B (en) * 2015-07-22 2020-04-03 清华大学 Pin-type bending-resistant longitudinal connection node and its construction method
CN105401590A (en) * 2015-11-20 2016-03-16 国家电网公司 Foundation structure used for steel tube tower installation and provided with tube protection channel and preparation method of foundation structure
CN106049525A (en) * 2016-07-27 2016-10-26 天津大学 Polygonal offshore wind power barrel-shaped foundation
CN106638659A (en) * 2016-10-27 2017-05-10 中国电建集团华东勘测设计研究院有限公司 Towing truss-gravity type combined offshore wind turbine foundation structure and construction method thereof
CN109235479A (en) * 2018-09-21 2019-01-18 中交航局第二工程有限公司 Large-tonnage pier and its prefabricated and floatation type dock construction method
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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
CN110439018A (en) * 2019-08-02 2019-11-12 中交第四航务工程勘察设计院有限公司 A kind of new plug-in steel cylinder wind power foundation
CN111764394A (en) * 2020-07-06 2020-10-13 华电重工股份有限公司 Installation method of cylindrical foundation
CN112962650A (en) * 2021-03-19 2021-06-15 杨帅 Pile foundation reinforcing device for highway bridge detection

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