CN109881659A - A kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability - Google Patents
A kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability Download PDFInfo
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- CN109881659A CN109881659A CN201910239761.5A CN201910239761A CN109881659A CN 109881659 A CN109881659 A CN 109881659A CN 201910239761 A CN201910239761 A CN 201910239761A CN 109881659 A CN109881659 A CN 109881659A
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Abstract
The invention discloses a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability, belongs to marine wind electric field field of foundation treatment.This method mainly includes building stabilization zone, bed course and scour protection layer, and the preferred the method for mixing cement and soil into pile of reinforcement means, bed course and scour protection layer use jackstone method；The vertical equal length of cement mixing pile or elongated degree arrangement, horizontal direction have a variety of arrangement forms such as radiant type, circular ring type；By pile peripheral earth property, suitable foundation stabilization range B and reinforcement depth H is determined；Top is laid with bed course and scour protection layer, has certain protection against erosion ability.Offshore wind power foundation reinforcement means provided by the invention can be effectively improved shallow-layer soil body physico mechanical characteristic, increase resistance of soil, achieve the purpose that improve pile foundation level bearing capacity, reduce foundation pile horizontal displacement and reduce engineering cost.
Description
Technical field
The invention belongs to soft clay area stiffening basic ground fields under complicated marine environment, and in particular to one kind has erosion control
The offshore wind farm steel pipe pile foundation foundation reinforcement method of brush ability.
Background technique
Large diameter steel pipe pile foundation is a kind of offshore wind farm facility protection against erosion commonly base form, in complicated marine environment
Under, the influence of the factors such as wind-engaging, wave, stream causes steel pipe pile foundation to generate biggish horizontal bearing capacity and horizontal displacement, in threat
The safety of portion's blower.Large diameter steel pipe pile cost of manufacture is higher, and construction technology, construction equipment are more demanding in addition, constrains sea
The development of upper wind-powered electricity generation industry.Pile foundation level bearer properties are affected by the shallow-layer soil body, are controlled by top Pile side soil body drag, shallowly
For layer soil body mostly based on mud, silt, soil property is relatively poor.It is improved in Practical Project by using the method for increasing stake diameter
Pile foundation level bearing capacity, causes steel-pipe pile cost of manufacture to increase, and difficulty of construction improves significantly.
Therefore, steel-pipe pile horizontal bearing characteristic how is effectively improved, engineering cost is reduced, is a problem to be solved.
Summary of the invention
To solve the above problems, the invention discloses a kind of offshore wind farm steel pipe pile foundation ground with protection against erosion ability
Reinforcement means can effectively improve pile foundation level bearing capacity, reduce pile foundation level displacement by improving pile peripheral earth characteristic.
In order to achieve the above objectives, technical scheme is as follows:
A kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability, comprising the following steps:
(1) before foundation stabilization, by live coring and laboratory test, soil cement physico mechanical characteristic is determined, and then determine cement
The parameter of mixing pile；
(2) stabilization zone is built up on the outside of steel-pipe pile,
(3) bed course and scour protection layer are laid on stabilization zone top using jackstone method；
(4) power transmission cable protective layer is constructed.
Further, laboratory test described in step (1) includes unconfined compression strength test, triaxial consolidation not Drainage Shear
Cut test, conventional one-dimensional consolidation test, specific gravity test, water content test, liquid model limitation test etc.；Determined mechanics index of physics packet
Include unconfined compressive strength value, Shear Strength Index, compression modulus, soil cement severe, relative density, infiltration coefficient, Atterberg Limit
Deng.
Further, step (2) combines factors, the stabilization zones such as geological conditions, the construction equipment condition of steel-pipe pile preferentially to adopt
Use Deep Mixing Method.
Further, step (2) bed course uses cobble, rubble or the broken concrete of 1-5cm.
Further, step (2) scour protection layer uses the block stone or concrete block of 10-50cm.
Further, one layer of geotextiles are laid between step (2) bed course and scour protection layer.
Further, reserved cable installation seam when upper protective layer is washed away in step (4) laying, after cable installation,
Protective layer is filled in the installation is stitched.
A kind of offshore wind farm steel pipe pile foundation ground with protection against erosion ability, including stabilization zone, bed course and scour protection
Layer three parts；Pile foundation level bearing capacity is improved for improving Pile side soil bulk properties in stabilization zone；Bed course and scour protection layer play anti-
Souring, the stabilization zone are arranged on the outside of steel pipe pile foundation, and stabilization zone top is laid with bed course and scour protection layer.
Further, determine reinforcing scope: steel-pipe pile stake diameter be D, stabilization zone depth H be 3 ~ 4D, reinforce sector width B be 5 ~
10D；Vertical reinforcement form is equal length or becomes length fashion, and horizontal direction reinforcement form has the forms such as radiant type or circular ring type.
The beneficial effects of the present invention are:
A kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability of the present invention, pile peripheral earth support
Anti- pile foundation level bearing capacity plays an important role, and consolidated subsoil soil can improve the physico mechanical characteristic of foundation soil, improves steel pipe
Stake horizontal bearing capacity, reduces steel-pipe pile horizontal distortion；It can reduce offshore wind farm engineering cost, improve engineering efficiency, it is ensured that wind
Machine whole structural stability.
Detailed description of the invention
Fig. 1 is sectional view of the invention.
Fig. 2 is the top view of the first arrangement form (radiant type) of cement mixing pile.
Fig. 3 is the top view of second of arrangement form of cement mixing pile (circular ring type).
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
As shown in Figure 1, the present invention devises a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method, including reinforce
4 three parts of area 2, bed course 3 and scour protection floor；Wherein, stabilization zone is vertically equal length or elongated degree arrangement, and reinforcement depth H is 3
~ 4D, reinforcing width B are 5 ~ 10D, and D is 1 diameter of steel-pipe pile；Stabilization zone top is followed successively by bed course 3 and scour protection layer 4.
As shown in Figure 1, cobble, rubble or broken concrete of the bed course 3 using 1-5cm, erosion control brush layer 4 use 10-50cm
Stone or concrete block, 4 thickness of erosion control brush layer be greater than 3 thickness of bed course；It is laid with reserved cable installation seam when protective layer, to electricity
After cable installation, protective layer is filled in the installation is stitched.
Such as the arrangement form that Fig. 2 to Fig. 3 is cement mixing method, respectively radiant type and circular ring type；It needs to carry out before reinforcing
Laboratory test determines the cement mixed ratio, the ratio of mud, grouting pressure of cement mixing pile using the mechanics index of physics of soil cement
Etc. parameters.Wherein, laboratory test includes unconfined compression strength test, triaxial consolidation undrained shear test, routinely unidirectionally consolidates
Tie test, specific gravity test, water ratio test, liquid model limitation test etc..
According to marine environment feature and water level depth, suitable cement mixing pile workboat and construction machinery are selected；It is adjacent
Mixing pile uses mutual lap joint form, determines the suitable lap of splice.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution composed by arbitrarily being improved by the above technical characteristic.
Claims (9)
1. a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability, it is characterised in that: including following
Step:
(1) before foundation stabilization, by live coring and laboratory test, soil cement physico mechanical characteristic is determined, and then determine cement
The parameter of mixing pile；
(2) round stabilization zone is built up on the outside of steel-pipe pile,
(3) bed course and scour protection layer are laid on stabilization zone top using jackstone method；
(4) power transmission cable protective layer is preset on scour protection layer.
2. a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability according to claim 1,
It is characterized by: laboratory test described in step (1) includes unconfined compression strength test, triaxial consolidation undrained shear examination
It tests, conventional one-dimensional consolidation test, specific gravity test, water content test, liquid model limitation test；Determined mechanics index of physics includes no side
Limit compression strength value, Shear Strength Index, compression modulus, soil cement severe, relative density, infiltration coefficient, Atterberg Limit.
3. a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability according to claim 1,
It is characterized by: step (2) combines the geological conditions of steel-pipe pile, construction equipment condition, stabilization zone uses Deep Mixing Method.
4. a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability according to claim 1,
It is characterized by: step (2) bed course uses cobble, rubble or the broken concrete of 1-5cm.
5. a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability according to claim 1,
It is characterized by: step (2) scour protection layer uses the block stone or concrete block of 10-50cm.
6. a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability according to claim 1,
It is characterized by: being laid with one layer of geotextiles between step (2) bed course and scour protection layer.
7. a kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability according to claim 1,
It is characterized by: step (4) is laid with reserved cable installation seam when top scour protection layer, after cable installation, described
Interior fill concrete protective layer is stitched in installation.
8. a kind of offshore wind farm steel pipe pile foundation ground with protection against erosion ability, it is characterised in that: including stabilization zone, bed course and
Scour protection layer three parts；The stabilization zone is arranged on the outside of steel pipe pile foundation, and stabilization zone top is laid with bed course and scour protection
Layer.
9. a kind of offshore wind farm steel pipe pile foundation ground with protection against erosion ability according to claim 8, feature exist
In: stabilization zone depth is 3-4 times of steel-pipe pile stake diameter, reinforces 5-10 times that sector width is steel-pipe pile stake diameter；Vertical reinforcement form
For equal length or become length fashion, horizontal direction reinforcement form has radiant type or circular ring type form.
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| CN201910239761.5A CN109881659A (en) | 2019-03-27 | 2019-03-27 | A kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability |
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| CN201910239761.5A CN109881659A (en) | 2019-03-27 | 2019-03-27 | A kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439020A (en) * | 2019-08-22 | 2019-11-12 | 上海勘测设计研究院有限公司 | Marine single-pile foundation with sand pile reinforcing ground |
| CN110439023A (en) * | 2019-08-22 | 2019-11-12 | 上海勘测设计研究院有限公司 | Marine single-pile foundation with foundation reinforcement high pressure grouting pile |
| CN110439021A (en) * | 2019-08-22 | 2019-11-12 | 上海勘测设计研究院有限公司 | Marine single-pile foundation with Reinforcement with Cement-mixed Piles ground |
| CN110439022A (en) * | 2019-08-22 | 2019-11-12 | 上海勘测设计研究院有限公司 | Marine single-pile foundation with compacting grouting and reinforcing ground |
| CN110512638A (en) * | 2019-08-27 | 2019-11-29 | 东南大学 | Offshore wind farm steel pipe pile foundation Anti-scouring structure and its construction method |
| CN112663668A (en) * | 2021-01-15 | 2021-04-16 | 中国能源建设集团浙江省电力设计院有限公司 | Disc type composite single-pile fan foundation suitable for soft soil seabed and construction method |
| CN112814008A (en) * | 2021-02-09 | 2021-05-18 | 中交路桥建设有限公司 | Steel pipe pile structure of steel box girder and construction method |
| CN113174990A (en) * | 2021-04-29 | 2021-07-27 | 福建永强岩土股份有限公司 | Rotary spraying reinforcement method for foundation around subsidence of ocean deep water inclined pile |
| CN113175004A (en) * | 2021-04-25 | 2021-07-27 | 中国长江三峡集团有限公司 | Anti-scouring device and method for offshore wind power single-pile foundation |
| CN113174992A (en) * | 2021-04-29 | 2021-07-27 | 福建永强岩土股份有限公司 | Comprehensive treatment and reinforcement method for collapse of stratum around marine deep-water inclined pile |
| CN113718820A (en) * | 2021-08-20 | 2021-11-30 | 都城伟业集团有限公司 | Offshore wind power steel pipe pile combined reinforcing device and reinforcing method |
| WO2022037707A1 (en) * | 2021-03-08 | 2022-02-24 | 中国长江三峡集团有限公司 | Monopile foundation using cemented vibroflotation pile to reinforce soft soil foundation for use in offshore wind power generation, and construction method |
| CN114753414A (en) * | 2022-04-13 | 2022-07-15 | 中交三航局第三工程有限公司 | Intelligent anti-scouring device and method for annular grid type fluidized soil steel pipe pile |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439023A (en) * | 2019-08-22 | 2019-11-12 | 上海勘测设计研究院有限公司 | Marine single-pile foundation with foundation reinforcement high pressure grouting pile |
| CN110439021A (en) * | 2019-08-22 | 2019-11-12 | 上海勘测设计研究院有限公司 | Marine single-pile foundation with Reinforcement with Cement-mixed Piles ground |
| CN110439022A (en) * | 2019-08-22 | 2019-11-12 | 上海勘测设计研究院有限公司 | Marine single-pile foundation with compacting grouting and reinforcing ground |
| CN110439020A (en) * | 2019-08-22 | 2019-11-12 | 上海勘测设计研究院有限公司 | Marine single-pile foundation with sand pile reinforcing ground |
| CN110512638A (en) * | 2019-08-27 | 2019-11-29 | 东南大学 | Offshore wind farm steel pipe pile foundation Anti-scouring structure and its construction method |
| CN112663668A (en) * | 2021-01-15 | 2021-04-16 | 中国能源建设集团浙江省电力设计院有限公司 | Disc type composite single-pile fan foundation suitable for soft soil seabed and construction method |
| CN112814008A (en) * | 2021-02-09 | 2021-05-18 | 中交路桥建设有限公司 | Steel pipe pile structure of steel box girder and construction method |
| WO2022037707A1 (en) * | 2021-03-08 | 2022-02-24 | 中国长江三峡集团有限公司 | Monopile foundation using cemented vibroflotation pile to reinforce soft soil foundation for use in offshore wind power generation, and construction method |
| GB2609841B (en) * | 2021-03-08 | 2024-04-03 | China Three Gorges Corp | Monopile foundation using cemented vibroflotation pile to reinforce soft soil foundation for use in offshore wind power generation, and construction method |
| GB2609841A (en) * | 2021-03-08 | 2023-02-15 | China Three Gorges Corp | Monopile foundation using cemented vibroflotation pile to reinforce soft soil foundation for use in offshore wind power generation, and construction method |
| CN113175004A (en) * | 2021-04-25 | 2021-07-27 | 中国长江三峡集团有限公司 | Anti-scouring device and method for offshore wind power single-pile foundation |
| CN113175004B (en) * | 2021-04-25 | 2022-06-07 | 中国长江三峡集团有限公司 | Anti-scouring device and method for offshore wind power single-pile foundation |
| CN113174992A (en) * | 2021-04-29 | 2021-07-27 | 福建永强岩土股份有限公司 | Comprehensive treatment and reinforcement method for collapse of stratum around marine deep-water inclined pile |
| CN113174990B (en) * | 2021-04-29 | 2023-05-23 | 福建永强岩土股份有限公司 | Rotary spraying reinforcement method for pile periphery collapse foundation of ocean deep water inclined pile |
| CN113174990A (en) * | 2021-04-29 | 2021-07-27 | 福建永强岩土股份有限公司 | Rotary spraying reinforcement method for foundation around subsidence of ocean deep water inclined pile |
| CN113718820A (en) * | 2021-08-20 | 2021-11-30 | 都城伟业集团有限公司 | Offshore wind power steel pipe pile combined reinforcing device and reinforcing method |
| CN114753414A (en) * | 2022-04-13 | 2022-07-15 | 中交三航局第三工程有限公司 | Intelligent anti-scouring device and method for annular grid type fluidized soil steel pipe pile |
| CN114753414B (en) * | 2022-04-13 | 2023-07-14 | 中交三航局第三工程有限公司 | Intelligent anti-scouring device and method for annular grid type fluidized soil steel pipe pile |
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Application publication date: 20190614 |
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