CN113026795A - Water wind power tower consolidation rockfill column pier surrounding type foundation and construction method thereof - Google Patents
Water wind power tower consolidation rockfill column pier surrounding type foundation and construction method thereof Download PDFInfo
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- CN113026795A CN113026795A CN202110256735.0A CN202110256735A CN113026795A CN 113026795 A CN113026795 A CN 113026795A CN 202110256735 A CN202110256735 A CN 202110256735A CN 113026795 A CN113026795 A CN 113026795A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/22—Foundations specially adapted for wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a water wind power tower consolidation rockfill column pier-enclosing foundation and a construction method thereof, and the foundation comprises a water wind power tower, wherein the periphery of the foundation of the water wind power tower is paved with rock blocks which are stacked to form a rockfill pier, and the rockfill pier is poured and consolidated into a whole through underwater non-dispersible concrete; the underwater non-dispersible concrete is prepared from the following raw materials in percentage by mass: underwater non-dispersible geopolymer cement: sand: the stone is 1: 0-1. The concretion rockfill column pier-surrounding foundation solves the problem of scouring erosion of seawater on the wind power tower foundation, the adopted underwater non-dispersible concrete is injected into the seawater to be free from dispersion, the fluidity is good, rockfill gaps can be filled, riprap is concreted into a whole, the whole wind power tower is more stable, the concretion can be performed quickly, seawater scouring can be prevented, and the seawater corrosion resistance problem of the offshore wind power foundation can be effectively relieved.
Description
Technical Field
The invention belongs to the technical field of wind power tower foundation reinforcement, and particularly relates to an overwater wind power tower consolidation rockfill column pier surrounding type foundation and a construction method thereof.
Background
With the development of social economy and the continuous progress of science and technology, resources required by the development of human society are increasing day by day. However, global energy crisis, environmental pollution and greenhouse effect are getting more and more serious, and thus more and more countries pay attention to the development and utilization of renewable energy and clean energy. In this situation, wind energy has received global attention as a clean energy source of choice. China is a large country for utilizing wind energy, but compared with other power sources, the wind energy still occupies a small proportion. The onshore wind power station in China develops for many years, and the construction speed is gradually slowed down. Compared with a land wind power plant, the offshore wind power plant has the characteristics of large wind energy resource storage, high development efficiency, small environmental pollution, no occupation of cultivated land and the like, so that the offshore wind power development has wide prospect.
In the prior art, a wind driven generator is arranged on a tower-shaped structure and connected to a foundation through a transition part, and concrete is annularly poured around the transition part to ensure that vertical and horizontal load energy on a tower is transmitted to the foundation. Meanwhile, the transition part can also adjust the tower to be in a vertical state, so that the wind power tower can still normally run even if the foundation inclines in the construction process. The foundation structure of the offshore wind power tower is a huge cantilever structure which is arranged in the sea and carries large-mass eccentric load, and when the foundation structure is under the action of wind, waves, current and fan load, the upper structure is easy to generate large vibration, so that the fatigue and damage of the structure are easily caused. Due to the repeated action of wind waves, the seabed around the foundation pile is always continuously washed by seawater and is difficult to fix, so that the foundation pile is displaced, and the structure is unstable.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a water wind power tower consolidation rockfill column pier-surrounding foundation and a construction method thereof, which can effectively solve the problems of structural fatigue damage and foundation corrosion caused by frequent seawater scouring of an offshore wind power foundation.
The invention is realized by the following technical scheme:
a water wind power tower concretion rockfill column pier-surrounding type foundation comprises a water wind power tower, wherein block stones are paved around the foundation of the water wind power tower, the block stones are stacked to form a rockfill pier, and the rockfill pier is concreted into a whole through underwater non-dispersible concrete;
the underwater non-dispersible concrete is prepared from the following raw materials in percentage by mass: underwater non-dispersible geopolymer cement: sand: the stone is 1: 0-1.
Preferably, the underwater non-dispersible geopolymer cementing material consists of the following raw materials in percentage by mass: 70-90% of granulated blast furnace slag micro powder, 10-30% of excitant, 0.2-2% of anti-dispersant and the balance of water; wherein the water-to-glue ratio is 0.40-0.60.
Preferably, the granulated blast furnace slag micro powder meets GB/T18046-2008 standardThe specific surface area is more than 600m and is prepared by grinding after magnetic separation and iron removal treatment2/kg of granulated blast furnace slag micropowder.
Preferably, the anti-dispersing agent is one or more of water-soluble cellulose ethers and water-soluble acrylic polymers.
Preferably, the particle size of the stones is less than or equal to 10 mm.
A construction method for a water wind power tower concretion rockfill column pier-surrounding type foundation comprises the following steps:
step 1) arranging more than one auxiliary guide pipe around the foundation of the overwater wind power tower, and arranging dense through holes on the lower part of the auxiliary guide pipe and the pipe wall in the design elevation range of the pier-surrounding foundation;
step 2) throwing rock blocks to the periphery of the foundation of the overwater wind power tower to reach a designed elevation to form a rock-fill body serving as a rock-fill surrounding pier;
step 3) throwing fine aggregate to the surface of the rockfill surrounding pier to form a slurry protection layer so as to reduce the loss of subsequent grouting materials;
step 4) inserting a grouting pipe into the auxiliary guide pipe, injecting underwater non-dispersible concrete slurry into the auxiliary guide pipe through the grouting pipe, and injecting the underwater non-dispersible concrete slurry into the rockfill surrounding pier through the through hole in the pipe wall of the auxiliary guide pipe to perform grouting filling on the rockfill body;
and 5) solidifying the underwater non-dispersible concrete slurry in the rockfill body, and consolidating the rockfill pier into a whole to form the consolidated rockfill column pier-type foundation.
Preferably, the inner diameter of the auxiliary conduit is 200-300 mm; the diameter of the through hole is more than 3 times of the maximum grain diameter of the concrete aggregate; the particle size of the lump stone is 300-1500 mm.
Preferably, the diameter of the through hole is 50-70 mm.
The invention has the following beneficial effects:
1. the method comprises the steps of firstly throwing block stones around the water wind power tower foundation to form the rockfill surrounding pier, then pouring underwater non-dispersible concrete into the surrounding pier riprap, and consolidating the surrounding pier riprap into a whole to form the consolidated rockfill column surrounding pier foundation, so that the problem of scouring erosion of seawater on the wind power tower foundation is solved.
2. The grouting material adopted by the invention is high-fluidity geopolymer underwater non-dispersible concrete, the geopolymer is an inorganic material, is not aged and corrosion-resistant, and is highly compact like glass, is dry after being soaked in water for a plurality of weeks, has strong protection on reinforcing steel bars, and has no strength reduction and reverse rise after being soaked in sulfate compared with common concrete for more than ten years, so that the problem that the foundation of an offshore wind power tower is corroded by seawater can be effectively relieved.
3. The grouting material adopted by the invention has the characteristic of ultrahigh strength, can reach the strength of more than 2 times of common cement, has obvious advantages on the ultrahigh-strength concrete for configuring offshore wind power, and reduces the number of ripstones, thereby reducing the comprehensive cost.
Drawings
FIG. 1 is a schematic diagram of a structure of a hydro-wind power tower;
FIG. 2 is a schematic diagram of a construction process of an offshore wind power tower concreted rockfill pillar pier-surrounding foundation: (a) is an enlarged view of area a in fig. 1; (b) is a schematic view of a buried pipe; (c) is a schematic view of riprap; (d) is a schematic covering diagram; (e) is a schematic illustration of grouting; (f) is a schematic view of consolidation;
FIG. 3 is a schematic diagram of an overwater wind power tower concreted rockfill column pier-surrounding foundation after construction is completed;
in the figure: A. a construction area; 1. a foundation; 2. a hydro-wind power tower; 3. an auxiliary conduit; 4. a through hole; 5. rockfill surrounding piers; 6. a slurry protecting layer; 7. a grouting pipe; 8. sizing agent; 9. and (5) consolidating the rockfill column surrounding pier foundation.
Detailed Description
For the convenience of understanding, the present invention will be described in further detail with reference to the accompanying drawings and specific examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
The utility model provides a wind-powered electricity generation tower consolidation rockfill column encloses pier formula basis on water, includes wind-powered electricity generation tower 2 on water, as shown in fig. 1, fig. 2, the stone block has been laid all around to the basis 1 of wind-powered electricity generation tower 2 on water, the stone block piles up and forms rockfill and encloses mound 5, the rockfill encloses the mound and pours into the consolidation into whole through non-dispersible concrete under water.
The underwater non-dispersible concrete is prepared from the following raw materials in percentage by mass: underwater non-dispersible geopolymer cement: sand: the stone is 1: 0-1.
The underwater non-dispersible geopolymer cementing material is prepared from the following raw materials in percentage by mass: 70 to 90 percent of granulated blast furnace slag micro powder, 10 to 30 percent of excitant (calculated by solid content), 0.2 to 2 percent of anti-dispersant and the balance of water; wherein the water-to-glue ratio is 0.40-0.60.
The granulated blast furnace slag micro powder is prepared by grinding after magnetic separation and iron removal treatment, and the specific surface area is more than 600m and meets the GB/T18046-2008 standard regulation2/kg of granulated blast furnace slag micropowder.
The anti-dispersing agent is one or more of water-soluble cellulose ethers (SCR) and water-soluble acrylic polymers (UWB).
In a preferable scheme, the particle size of the stones is less than or equal to 10 mm.
A construction method for a water wind power tower concretion rockfill column pier-surrounding type foundation comprises the following specific steps:
(1) pipe burying: as shown in fig. 2(a) and 2(b), in a construction area a, a plurality of auxiliary pipes 3 (with an inner diameter of 200-300 mm) are arranged around a foundation 1 of an above-water wind power tower 2, and dense through holes 4 (with a diameter more than 3 times of the maximum particle diameter of concrete aggregate, preferably 50-70 mm) are arranged on the lower portion of each auxiliary pipe 3 and on the pipe wall in a design elevation range of a surrounding pier foundation.
(2) Stone throwing: as shown in fig. 2(c), rock blocks (with the particle size of 300-1500 mm) are thrown around the foundation 1 of the overwater wind power tower 2 to a designed elevation to form a rock pile body serving as a rock pile surrounding pier 5.
(3) Covering: as shown in fig. 2(d), fine aggregate is thrown to the surface of the rock-fill pier 5 to form a slurry-protecting layer 6, so as to reduce the loss of the subsequent grouting material.
(4) Grouting: as shown in fig. 2(e), a grouting pipe 7 is inserted into the auxiliary guide pipe 3, underwater non-dispersible concrete slurry 8 is injected into the auxiliary guide pipe 3 through the grouting pipe 7, and the slurry 8 is injected into the rockfill pier 5 through the through hole 4 in the pipe wall of the auxiliary guide pipe 3, thereby grouting and filling the rockfill. The grouting pipe 7 is correspondingly lifted upwards along with the rising of the height of the injected slurry 8, the bottom of the grouting pipe 7 is kept 200mm below the liquid level of the slurry 8, and the grouting pipe 7 is drawn out after the pouring is finished, so that the grouting filling of the concrete to the rock-fill body is realized.
(5) Consolidation: after the concrete is grouted and filled into the rockfill body, the slurry 8 is cured inside the rockfill body, and the rockfill pier 5 is consolidated into a whole, as shown in fig. 2(f), so that a consolidated rockfill column pier foundation 9 is formed, as shown in fig. 3.
The construction method of the invention utilizes the auxiliary guide pipe with the dense holes on the pipe wall to insert the grouting pipe into the auxiliary guide pipe, the height of the grouting pipe is lifted along with the lifting of the grouting height, and the grouting pipe is pulled out after the pouring is finished. Through throwing stone slip casting method, fill the thick liquids into throwing the stone space, throw the stone and form a whole each other, be difficult for being broken away, make the structure become closely knit, play the guard action to wind power tower basis simultaneously.
The above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, and such modifications or replacements may not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A water wind power tower concretion rockfill column pier-surrounding type foundation comprises a water wind power tower and is characterized in that block stones are paved around the foundation of the water wind power tower and stacked to form a rockfill pier, and the rockfill pier is concreted into a whole through underwater non-dispersible concrete;
the underwater non-dispersible concrete is prepared from the following raw materials in percentage by mass: underwater non-dispersible geopolymer cement: sand: the stone is 1: 0-1.
2. The concreted rockfill column pier foundation of the overwater wind power tower according to claim 1, wherein the underwater non-dispersible geopolymer cementing material is prepared from the following raw materials in percentage by mass: 70-90% of granulated blast furnace slag micro powder, 10-30% of excitant, 0.2-2% of anti-dispersant and the balance of water; wherein the water-to-glue ratio is 0.40-0.60.
3. The foundation of claim 2, wherein the granulated blast furnace slag micro powder has a specific surface area of more than 600m, and is prepared by grinding after magnetic separation and iron removal treatment, and the specific surface area meets the GB/T18046-2008 standard2/kg of granulated blast furnace slag micropowder.
4. The concreted rockfill column pier foundation of claim 2, wherein the dispersant inhibitor is one or more of water-soluble cellulose ethers and water-soluble acrylic polymers.
5. The concreted rockfill column pier foundation of the overwater wind power tower according to claim 1, wherein the particle size of the stones is less than or equal to 10 mm.
6. The construction method for the concreted rockfill column pier-surrounding foundation of the offshore wind power tower, according to claim 1, is characterized by comprising the following steps:
step 1) arranging more than one auxiliary guide pipe around the foundation of the overwater wind power tower, and arranging dense through holes on the lower part of the auxiliary guide pipe and the pipe wall in the design elevation range of the pier-surrounding foundation;
step 2) throwing rock blocks to the periphery of the foundation of the overwater wind power tower to reach a designed elevation to form a rock-fill body serving as a rock-fill surrounding pier;
step 3) throwing fine aggregate to the surface of the rockfill surrounding pier to form a slurry protection layer so as to reduce the loss of subsequent grouting materials;
step 4) inserting a grouting pipe into the auxiliary guide pipe, injecting underwater non-dispersible concrete slurry into the auxiliary guide pipe through the grouting pipe, and injecting the underwater non-dispersible concrete slurry into the rockfill surrounding pier through the through hole in the pipe wall of the auxiliary guide pipe to perform grouting filling on the rockfill body;
and 5) solidifying the underwater non-dispersible concrete slurry in the rockfill body, and consolidating the rockfill pier into a whole to form the consolidated rockfill column pier-type foundation.
7. The construction method for the concreted rockfill column pier-surrounding foundation of the offshore wind turbine tower according to claim 6, wherein the inner diameter of the auxiliary conduit is 200-300 mm; the diameter of the through hole is more than 3 times of the maximum grain diameter of the concrete aggregate; the particle size of the lump stone is 300-1500 mm.
8. The construction method for the concreted rockfill column pier-surrounding foundation of the offshore wind turbine tower according to claim 7, wherein the diameter of the through hole is 50-70 mm.
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| CN202110256735.0A CN113026795A (en) | 2021-03-09 | 2021-03-09 | Water wind power tower consolidation rockfill column pier surrounding type foundation and construction method thereof |
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| CN202110256735.0A CN113026795A (en) | 2021-03-09 | 2021-03-09 | Water wind power tower consolidation rockfill column pier surrounding type foundation and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114277856A (en) * | 2022-01-21 | 2022-04-05 | 中国长江三峡集团有限公司 | Anti-scouring construction method for single-pile foundation based on mosaic underwater cemented rockfill |
| CN115583817A (en) * | 2022-08-29 | 2023-01-10 | 杭州国电大坝安全工程有限公司 | Organic-inorganic hybrid consolidation method and composition for seabed sludge |
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| CN114277856A (en) * | 2022-01-21 | 2022-04-05 | 中国长江三峡集团有限公司 | Anti-scouring construction method for single-pile foundation based on mosaic underwater cemented rockfill |
| CN114277856B (en) * | 2022-01-21 | 2023-09-01 | 中国长江三峡集团有限公司 | Anti-scour construction method for single pile foundation based on mosaic underwater cemented rock-fill |
| CN115583817A (en) * | 2022-08-29 | 2023-01-10 | 杭州国电大坝安全工程有限公司 | Organic-inorganic hybrid consolidation method and composition for seabed sludge |
| CN115583817B (en) * | 2022-08-29 | 2024-02-09 | 杭州国电大坝安全工程有限公司 | Method and composition for organic-inorganic hybrid consolidation of seabed sludge |
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