CN111486060B - Fan foundation recycling method - Google Patents

Fan foundation recycling method Download PDF

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Publication number
CN111486060B
CN111486060B CN202010308463.XA CN202010308463A CN111486060B CN 111486060 B CN111486060 B CN 111486060B CN 202010308463 A CN202010308463 A CN 202010308463A CN 111486060 B CN111486060 B CN 111486060B
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Prior art keywords
foundation
fan
wind turbine
concrete
upper platform
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CN111486060A (en
Inventor
何建新
姜楠楠
郝爱存
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Zhong Huan Ke Ang Beijing Technology Co ltd
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Tianjin Kehui New Energy Technology Development Co ltd
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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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D37/00—Repair of damaged foundations or foundation structures
    • 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
    • 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
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • 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
    • 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
    • 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
    • Y02E10/728—Onshore wind turbines
    • 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
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a fan foundation recycling method, which comprises the steps of utilizing a transition section of a fan foundation ring connected with an updated and modified fan tower, analyzing and evaluating appearance quality, stability, material performance and file record data of a fan foundation of a wind turbine generator set needing to be updated and modified according to updating and modifying design requirements, or directly connecting the transition section on the foundation ring and connecting the updated and modified fan tower on the transition section, and installing an updated and modified wind driven generator on the updated and modified fan tower to recycle the fan foundation; or after finishing the repair operations of the stability, the appearance, the bearing capacity improvement and the like of the fan foundation, connecting the transition section on the foundation ring and connecting and fixing the updated and modified fan tower frame on the transition section to finish the reutilization of the fan foundation; or after the connection between the foundation ring and the transition section is completed, the bearing capacity of the wind turbine foundation is lifted and repaired, and the wind turbine tower and the wind driven generator are installed, so that the wind turbine foundation is recycled.

Description

Fan foundation recycling method
Technical Field
The invention relates to a foundation utilization method, in particular to a fan foundation reuse method, and belongs to the technical field of wind power generation equipment installation.
Background
Wind energy is an inexhaustible renewable clean energy source, and wind power generation is the most potential sustainable development project. China has huge wind energy storage and wide distribution range, and in recent years, wind power generation is rapidly developed and becomes one of the main countries of the world.
The wind turbine generator set mainly comprises a fan tower, a wind driven generator arranged at the top of the fan tower and a fan foundation required by the fan tower.
In the prior art, a fan foundation generally comprises a reinforced concrete bearing platform and a steel structure foundation ring arranged on the reinforced concrete bearing platform, wherein the part of the foundation ring is embedded in the reinforced concrete bearing platform, and a flange used for installing a fan tower is arranged on the foundation ring exposed out of the reinforced concrete bearing platform.
After a certain time of operation, some fan foundations can cause unstability because of soil erosion and water loss, and surface quality problems such as damage, cracks can appear in the concrete of some fan foundations, and serious still can lead to that the foundation ring is not hard up, reinforced concrete cushion cap emergence scheduling problem appears.
In response to this series of quality problems, the prior art has provided various methods for maintenance and reinforcement, such as:
the invention patent (application number: 201510468612.8) provides a method for applying annular prestress to the connection of a foundation ring of a fan, which fills a damaged concrete gap by drilling, pouring high pressure to the vicinity of a flange at the bottom of the foundation ring; applying annular prestress to a bearing platform at the upper part of the foundation, and dispersing and transmitting load near a flange at the bottom of the foundation ring;
the invention relates to a fan foundation reinforcing method added with horizontal steel bars, which is provided by the patent application (application number: 201710132588. X). in the method, the foundation ring burial depth is increased on a foundation upper platform and the diameter of the foundation upper platform is increased to reinforce the fan foundation through steel bar planting and new steel bar arrangement;
the invention relates to a local reinforcing device and a local reinforcing method for a foundation ring of a wind generating set, which are provided by the patent application (application number: 201710464348. X). The method comprises the steps of punching a hole on the foundation ring, fixing a ribbed plate structure, then welding and fixing a new steel bar implanted in a foundation with the ribbed plate structure, and finally embedding the ribbed plate structure and the new implanted steel bar with concrete;
the invention patent application (application number: 201810282032.3) provides a method for reinforcing a fan foundation, which comprises the steps of planting ribs on the top of the foundation and the upper part of a base bottom plate according to a rib plate type structure, and then erecting a formwork at the rib planting part to pour concrete;
the invention provides a conversion supporting method for reinforcing fan foundation connection (application number: 201710650040.4). A vertical hole is drilled from the top of a foundation to the upper part of a foundation ring bottom flange, conversion supports are placed in the hole, gaps in the hole are filled with slurry, a stress complex state near the foundation ring bottom flange is led to the top surface of the foundation, and finally the top surface of the foundation is reinforced;
the invention provides a fan foundation reinforcing method which is provided by the patent application (application number: 201810182071.6). The method is used for carrying out high-pressure grouting repair on damaged concrete on the upper part of a foundation ring bottom flange;
the invention patent application (application number: 201811280636.0) provides a fan foundation structure reinforcing device, and the method is characterized in that the fan foundation structure reinforcing device is used for reinforcing;
the invention provides a comprehensive reinforcing device and a reinforcing method for a foundation ring type fan foundation, which are provided by the patent application (application number: 201910379072.4). in the method, shear key reinforcement is formed on the welding bolt top of the side wall of a foundation ring;
the invention patent application (application number: 201910731968.4) provides a foundation ring loosening and reinforcing treatment scheme, which comprises the steps of drilling holes, injecting polyurethane for reinforcing;
in the prestressed concrete reinforcing structure of the fan foundation provided by the invention patent application (application number: 201910910418.9), post-poured reinforced concrete is arranged above a concrete foundation layer, and concrete is poured into an annular grouting cavity to expand a whole fan reinforcing ring to realize prestressed post-tensioning and realize structural reinforcement of the concrete foundation;
the invention patent application (application number: 201910910946.4) provides a method for rapidly repairing a fan foundation, which is used for reinforcing the fan foundation by applying prestress and grouting;
the utility model provides a fan foundation multidimensional reinforcement structure (application number: 201720039649.3), which applies vertical and annular prestress on a fan foundation upper platform by arranging an expansion anchor rod and a prestress rib ring so as to reinforce the foundation;
the utility model discloses a "a conversion supporting component for reinforcing fan foundation connection" that utility model patent (application number: 201720953837.7) provided is through drilling to the flange upper portion at the bottom of the foundation ring in the foundation top, then inserts conversion equipment and passes to the foundation top with the atress of foundation ring, and the conversion equipment that exposes the foundation top at last is fixed through the mode of reinforced concrete.
Looking at the above prior art, it can be found that:
the reinforcement structure, the reinforcement device, the reinforcement method or the reinforcement scheme of the fan foundation and the like are used for reinforcing concrete near a foundation ring bottom flange after the concrete is damaged, and the reinforcement structure, the reinforcement device, the reinforcement method or the reinforcement scheme comprise the steps of bar planting, foundation concrete volume increasing, annular and vertical pretightening force applying, grouting and the like, but the reinforcement measures are only used for reinforcing the foundation of the built fan foundation to be loosened or grouted.
However, for some wind turbines and wind power plants which need to be eliminated and updated, how the existing wind turbine foundation should be processed, no specific method is given in the prior art; in addition, because the wind turbine generator after being generally updated and modified is inconsistent with the original wind turbine generator in the aspects of specification, weight and the like, the newly modified wind turbine generator can not be directly installed on the basis of the left-over wind turbine generator generally, and the prior art does not provide a corresponding technical scheme for the newly modified wind turbine generator.
Obviously, if the left fan foundation is abandoned, on one hand, a large amount of land waste and environment damage can be caused, and on the other hand, a huge amount of assets can be lost, and a large amount of manpower and material resources are wasted.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a method for recycling a wind turbine foundation, which is used for updating and transforming a wind turbine generator and aims to: the wind turbine tower for updating and transforming the wind turbine generator is erected by fully utilizing the original wind turbine foundation, and the updated and transformed wind turbine generator is arranged on the wind turbine tower, so that the investment of updating and transforming land resources and the wind turbine generator is saved, the environment is protected, and the better social benefit is provided while the economic benefit is ensured.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a fan foundation recycling method is used for updating and transforming a wind turbine;
the wind turbine generator set comprises a fan foundation, a fan tower constructed on the fan foundation and a wind driven generator installed on the fan tower;
the fan foundation recycling means that the fan foundation of the existing wind turbine generator set is used for updating and transforming a wind driven generator and a corresponding matched fan tower, so that the installation requirements of the wind driven generator and the corresponding matched fan tower on the fan foundation after updating and transformation are met;
the fan foundation comprises a base station of a reinforced concrete structure and an upper platform of the reinforced concrete structure arranged on the base station, a steel structure foundation ring used for connecting and installing the fan tower is arranged on the upper platform, the part of the foundation ring is embedded in the upper platform, and a foundation flange is arranged at the bottom of the foundation ring embedded in the upper platform;
the method is characterized by comprising the following steps:
s1) designing and manufacturing a transition section capable of being connected with the foundation ring and the bottom of the fan tower according to the shape and the size of the bottom of the fan tower which is updated and reconstructed;
s2) checking and verifying the appearance quality, stability, material performance and archival record data of the wind turbine foundation;
s3) analyzing and evaluating the appearance quality, stability, material performance and archival data of the wind turbine foundation and the appearance quality, stability and bearing capacity of the wind turbine foundation required by the wind turbine generator and the wind turbine tower which are updated and modified according to the design requirements of updating and modifying, and performing the following operations according to the evaluation conclusion, wherein:
s31) the assessment conclusion is satisfactory, the following steps S4) and S5) are carried out;
s32), when the evaluation conclusion is that the stability is not satisfactory, carrying out stability repairing operation, and after the stability is satisfactory, carrying out the following steps S4) and S5);
s33), when the evaluation conclusion is that the appearance quality does not meet the requirement, performing appearance repairing operation, and after the appearance quality meets the requirement, performing the following steps S4) and S5);
s34), carrying out bearing capacity lifting repair operation when the evaluation conclusion is that the bearing capacity is not qualified, and completing the following steps S4) and S5) during or after the bearing capacity lifting repair operation;
s4) mounting and connecting the manufactured transition section on the foundation ring;
s5) connecting and fixing the updated and modified wind turbine tower on the transition section, and installing the updated and modified wind driven generator on the wind turbine tower, namely completing the recycling of the wind turbine foundation.
Further, the analyzing and evaluating in the step of S3) includes the steps of:
s30) according to the national wind turbine installation standard and the foundation construction standard, visual observation, a concrete resiliometer, a steel structure strength detection device and a finite element analysis method are adopted to evaluate the appearance quality, the stability and the bearing capacity of the wind turbine foundation.
Further, the stability restoration operation includes the steps of:
s6) adding and tamping backfill soil around the base platform and the upper platform until the stability of the fan foundation meets the requirements of the updating and reforming design.
Further, the appearance restoration operation includes the steps of:
s7) evaluating the appearance quality problem of the fan foundation and operating according to the following evaluation results:
s71) if the evaluation result shows that the appearance quality problem is only that the local outer layer concrete of the fan foundation falls off, shoveling part of the outer layer concrete of the area where the outer layer concrete falls off by using a shoveling tool, then troweling the shoveled part by using cement slurry until the shoveled part is solidified and the strength meets the standard;
s72) if the evaluation result shows that the appearance quality problem is that cracks occur on the local part of the fan foundation, shoveling the partial outer layer concrete of the cracks by using a shoveling tool in the crack area, filling the cracks by using a high-pressure grouting operation method in the cracks, and troweling the surfaces of the cracks by using cement slurry until the cracks are solidified and the strength meets the standard.
Further, the bearing capacity lifting repair operation comprises the following steps:
s8) analyzing the problem that the bearing capacity of the fan foundation does not meet the requirement, and operating according to the following analysis results:
s81) if the analysis result is that the bearing capacity is not satisfactory due to the loosening of the foundation ring embedded in the upper platform, reinforcing the foundation ring by the following method:
s811) drilling grouting holes in the upper part of the foundation flange or the outer side and the inner side of the upper part of the foundation flange on the upper platform, then injecting high-strength concrete into the grouting holes by using a high-pressure grouting operation method to form concrete reinforcing piers on the outer side or the inner side and the outer side of the upper part of the foundation flange, then filling the grouting holes with concrete, and after the concrete is solidified and the strength meets the standard; or
S812) drilling grouting holes reaching the outer side of the upper part of the foundation flange or the inner side and the outer side of the upper part of the foundation flange along the outer side of the foundation ring or the inner side and the outer side of the foundation ring on the upper platform, inserting a force transmission device into the grouting holes, injecting high-strength concrete by using a high-pressure grouting operation method to form reinforcing columns on the outer side or the inner side and the outer side of the upper part of the foundation flange, filling the grouting holes with concrete, and after the concrete is solidified and the strength meets the standard;
s82) if the analysis result shows that the bearing capacity is not satisfactory due to the unstable condition of the upper platform in which the foundation ring is embedded, reinforcing the foundation ring by the following method:
s821) firstly completing the step S4, installing the transition section on the foundation ring, then planting bars on the upper platform and the surface of the base platform around the upper platform, pouring concrete, enabling the bars to form a new upper platform wrapping the original upper platform on the base platform, burying the connecting part of the transition section and the foundation ring at the top of the new upper platform, and operating according to the step S5) after the concrete of the new upper platform is solidified and the strength of the concrete of the new upper platform meets the standard; or
S822) firstly completing S4, installing the transition section on the foundation ring, then planting bars and pouring concrete on the surface of the base platform on and around the upper platform, so as to form a new upper platform wrapping the original upper platform on the base platform, burying the connecting part of the transition section and the foundation ring in the top of the new upper platform, after the concrete of the new upper platform is solidified and the strength meets the standard, arranging at least one annular pre-tightening force ring on the periphery of the new upper platform, drilling a stress cable hole and arranging a longitudinal pre-stress cable at the connecting part of the original upper platform and the base platform on the new upper platform, then grouting after the pre-stress cable is subjected to stress tensioning, and sealing the hole, after the concrete in the stress cable hole is solidified and the strength meets the standard, operating according to S5);
s83) if the analysis result shows that the foundation ring embedded in the upper stage is loose and the bearing capacity is not satisfactory due to the unstable condition of the upper stage embedded with the foundation ring, performing reinforcement by the following method:
s831) firstly operating S811) or S812) step to reinforce the foundation ring, then performing S821) or S822) step to reinforce the upper platform, and finally operating S5) step to finish the reutilization of the fan foundation.
Compared with the prior art, the embodiment of the invention has the beneficial effects and obvious progress that:
1) the fan foundation recycling method provided by the embodiment of the invention is characterized in that after a transition section for connecting a foundation ring of a fan foundation and an updated and modified fan tower is manufactured, the fan foundation of a wind turbine generator set needing to be updated and modified is analyzed and evaluated according to the updating and modifying design requirements by carrying out appearance quality, stability, material performance and file record data, or the transition section is directly connected to the foundation ring and the updated and modified fan tower is fixedly connected to the transition section according to an evaluation conclusion, and then the updated and modified wind turbine generator is installed on the updated and modified fan tower to complete the recycling of the fan foundation; or
After the operations of stability restoration, appearance restoration, bearing capacity lifting restoration and the like are completed, connecting a transition section on the foundation ring and connecting and fixing the updated and modified fan tower frame on the transition section so as to complete the reutilization of the fan foundation; or also or
After the connection between the foundation ring and the transition section is completed, carrying out operations such as bearing capacity lifting repair and the like, and then completing the installation of a wind turbine tower and a wind driven generator on the basis to complete the reutilization of the wind turbine foundation;
2) according to the fan foundation recycling method provided by the embodiment of the invention, through the design, manufacture and use of the transition section, the problem that the shapes and sizes of the base rings of the fan tower frame which is usually updated and modified and the original fan foundation are not matched is solved, after the problems of the stability, appearance, bearing capacity and the like of the original fan foundation are solved, the updating and the modification of the wind turbine can be completed without re-establishing a new fan foundation, the reuse of the original fan foundation is realized, the process is simple, the adaptability is strong, the investment of the updating and the modification of land resources and the wind turbine can be greatly saved, the updating and the modification progress of the wind turbine is accelerated, the construction period is shortened, the environment is protected, and better social benefits are provided while the economic benefits are ensured;
3) the fan foundation recycling method provided by the embodiment of the invention analyzes and evaluates according to the appearance quality, stability, material performance and file record data of the original fan foundation and the requirements of updating and reforming design, according to the evaluation conclusion, after the original fan foundation is directly recycled through the transition section or the stability repairing operation, the appearance repairing operation and the bearing capacity improving repairing operation are carried out on the original fan foundation, the original wind turbine foundation is recycled through the transition section, the method is various, the measures are proper, the original wind turbine foundation can be fully utilized, the safety of the wind turbine generator after being updated and modified can be fully ensured, therefore, the purposes of saving land resources, updating and transforming capital, protecting the environment, guaranteeing economic benefits and providing fan foundation recycling with better social benefits are achieved, and the fan foundation recycling device has great popularization and application values.
Drawings
To more clearly illustrate the technical solution of the present invention, the drawings required for the embodiment of the present invention will be briefly described below. It should be apparent that the drawings in the following description are only drawings of some embodiments of the invention, and that other drawings can be obtained by those skilled in the art without inventive exercise, and the other drawings also belong to the drawings required by the embodiments of the invention.
FIG. 1 is a schematic block diagram of a fan foundation recycling process according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a conventional wind turbine;
FIG. 3 is a schematic diagram of a fan foundation recycling structure according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a foundation ring reinforced by using a reinforced pier in the fan foundation recycling method provided by the embodiment of the invention;
fig. 5 is a schematic structural view of a foundation ring reinforced by reinforcing columns in the method for recycling a wind turbine foundation according to the embodiment of the present invention;
fig. 6 is a schematic structural diagram of reinforcing an upper platform by using a bar planting manner in the fan foundation recycling method provided by the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a method for recycling a wind turbine foundation, in which an upper platform is reinforced by using a steel bar planting, a tension ring and a stress cable;
fig. 8 is a schematic structural view of a foundation ring and a foundation platform reinforced by reinforcing piers, reinforcing columns and steel bars in the fan foundation recycling method provided by the embodiment of the invention;
fig. 9 is a schematic structural diagram of a foundation ring and a foundation platform reinforced by reinforcing piers, reinforcing columns, steel bars, a tension ring and a stress cable in the fan foundation recycling method provided by the embodiment of the invention.
In the figure:
100-a fan foundation, 200-a fan tower, 200' -an original fan tower and 300-a transition section;
110-a base station;
120-upper stage, 120' -new upper stage, 121-bar planting, 122-annular pre-tightening force ring and 123-pre-tightening inhaul cable;
130-foundation ring, 131-foundation flange, 132-grouting hole, 133-reinforcing pier and 134-reinforcing column.
Detailed Description
In order to make the objects, technical solutions, advantages and significant progress of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings provided in the embodiments of the present invention, and it is obvious that all of the described embodiments are only some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the accompanying drawings of the embodiments of the present invention are used for distinguishing different objects and not for describing a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
It is to be understood that in the description of the embodiments of the present invention, the use of the terms orientation or position, which are used in the description of the embodiments of the present invention, are only based on the orientation or position shown in the drawings of the embodiments of the present invention, and are used for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element in question must have a specific orientation, a specific orientation configuration and operation, and therefore, should not be taken as limiting the invention.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, movably connected, or integrated; either directly or indirectly through intervening media, intangible signal, or even optical, communication between two elements, or an interaction between two elements, unless expressly limited otherwise.
The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should be further noted that the following embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.
The technical means of the present invention will be described in detail below with specific examples.
Examples
The embodiment provides a method for recycling a wind turbine foundation, which is used for updating and transforming a wind turbine generator.
The wind turbine generator set described in this embodiment generally includes a wind turbine foundation, a wind turbine tower constructed on the wind turbine foundation, and a wind turbine generator installed on the wind turbine tower.
The fan foundation recycling in this embodiment refers to the update and modification of the wind turbine generator and the corresponding matched fan tower by using the fan foundation of the existing wind turbine generator set, so as to meet the installation requirements of the updated and modified wind turbine generator and the corresponding matched fan tower on the fan foundation.
As shown in fig. 2, the structural schematic diagram of the existing wind turbine generator is as follows: the wind turbine foundation 100 comprises a base platform 110 of a reinforced concrete structure and a reinforced concrete structure upper platform 120 arranged on the base platform, wherein a steel structure foundation ring 130 used for connecting and installing an original wind turbine tower 200' is arranged on the upper platform 120, part of the foundation ring 130 is embedded in the upper platform 120, and a foundation flange 131 is arranged at the bottom of the foundation ring 130 embedded in the upper platform 120.
As shown in fig. 1, a schematic block diagram of a process for recycling a wind turbine foundation provided in an embodiment of the present invention, and fig. 3, a schematic diagram of a structure for recycling a wind turbine foundation provided in an embodiment of the present invention, a method for recycling a wind turbine foundation provided in this embodiment includes the following steps:
s1) designing and manufacturing a transition section 300 capable of being connected with the base ring 130 and the bottom of the wind turbine tower 200 according to the shape and the size of the bottom of the updated and modified wind turbine tower 200;
s2) checking and verifying the appearance quality, stability, material performance and archival record data of the wind turbine foundation 100;
s3) analyzing and evaluating the appearance quality, stability, material performance and file record data of the wind turbine foundation 100 and the appearance quality, stability and bearing capacity of the wind turbine foundation 100 required by the wind turbine generator (not shown) and the wind turbine tower 200 according to the updated and modified design requirements, and performing the following operations according to evaluation results, wherein:
s31), if the evaluation result is satisfactory, the following steps S4) and S5) are carried out;
s32), when the stability is not qualified in the evaluation conclusion, carrying out stability repairing operation, and carrying out the following steps S4) and S5) after the stability is qualified;
s33), when the evaluation conclusion is that the appearance quality does not meet the requirement, performing appearance repairing operation, and after the appearance quality meets the requirement, performing the following steps S4) and S5);
s24), carrying out bearing capacity lifting repair operation when the bearing capacity is judged to be not qualified, and completing the following steps S4) and S5) during or after the bearing capacity lifting repair operation;
s4) mounting and connecting the manufactured transition section 300 on the foundation ring 130;
s5) connecting and fixing the wind turbine tower 200 on the transition section 300, and installing a wind turbine generator (not shown) on the wind turbine tower 200, thereby completing the reuse of the wind turbine foundation.
Further, in this embodiment, the analysis and evaluation in the step S3) includes the steps of:
s20) according to the national wind turbine installation standard and the foundation construction standard, visual observation, a concrete resiliometer, a steel structure strength detection device and a finite element analysis method are adopted to evaluate the appearance quality, the stability and the bearing capacity of the wind turbine foundation.
Further, in this embodiment, the stability repairing operation includes the steps of:
s6) adding and compacting backfill around the base and the upper stage until the stability of the wind turbine foundation 100 meets the requirements of the renovation and the reconstruction.
Further, in this embodiment, the appearance repairing operation includes the steps of:
s7) evaluating the appearance quality problem of the wind turbine foundation and operating according to the following evaluation results:
s71) if the evaluation result is that the appearance quality problem is only that the local outer layer concrete of the fan foundation 100 falls off, shoveling part of the outer layer concrete of the area where the outer layer concrete falls off by using a shoveling tool, then troweling the shoveled part by using cement paste, and waiting for the shoveling part to be solidified and the strength of the troweling paste meets the standard;
s72) if the evaluation result shows that the appearance quality problem is that a crack occurs in the local part of the fan foundation 100, a shoveling tool is used for shoveling off the part of the outer concrete layer at the crack, then the crack is filled up by a high-pressure grouting operation method at the crack, then the surface of the crack is leveled by cement slurry, and the crack is solidified and the strength meets the standard.
Further, in this embodiment, the bearing capacity lifting and repairing operation includes the steps of:
s8) analyzing the problem that the bearing capacity of the wind turbine foundation is not satisfactory and operating according to the following analysis results:
s81) if the analysis result indicates that the bearing capacity does not meet the requirement due to loosening of the foundation ring embedded in the upper stage, the foundation ring is reinforced by using a reinforcement pier in the method for recycling a wind turbine foundation according to the embodiment of the present invention shown in fig. 4, and the foundation ring is reinforced by using a reinforcement column in the method for recycling a wind turbine foundation according to the embodiment of the present invention shown in fig. 5:
s811) drilling grouting holes 132 (shown in the left side of fig. 4) in the upper portion of the foundation flange 131 or the inner and outer sides of the upper portion of the foundation flange 131 on the upper stage 120, then injecting high-strength concrete into the grouting holes 132 by high-pressure grouting operation to form concrete reinforcing piers 133 (shown in the right side of fig. 4) on the outer side or the inner and outer sides of the upper portion of the foundation flange 131, and then filling the grouting holes 132 with concrete until the concrete is solidified and the strength meets the standard; or
S812) drilling grouting holes 132 (shown in the left side of fig. 5) to the outer side of the upper portion of the foundation flange 131 or the inner and outer sides of the upper portion of the foundation flange along the outer side of the foundation ring 130 or the inner and outer sides of the foundation ring 130 on the upper stage 120, inserting a force transmission device (not shown) into the grouting holes 132 and injecting high-strength concrete by a high-pressure grouting operation method so that reinforcing columns 134 (shown in the left side of fig. 5) or reinforcing columns 134 (shown in the right side of fig. 5) are formed on the outer side of the upper portion of the foundation flange 131 or the inner and outer sides, and then filling the grouting holes with concrete until the concrete is solidified and the strength meets the standard;
s82) if the analysis result indicates that the load-carrying capacity does not meet the requirement due to the unstable condition of the upper stage of the embedded foundation ring, the upper stage is reinforced by using the steel bar-planting method according to fig. 6, and the upper stage is reinforced by using the steel bar-planting, the tension ring and the stress cable according to fig. 7:
s821) firstly, operating S3) and S4, installing the transition section 300 on the foundation ring 130, then, planting the ribs 121 on the upper platform 120 and the surface of the base platform 110 around the upper platform 120, pouring concrete, so that a new upper platform 120 ' wrapping the original upper platform 120 is formed on the base platform 110, the connecting part of the transition section 300 and the foundation ring 130 is buried in the top of the new upper platform 120 ', and after the concrete of the new upper platform 120 ' is solidified and the strength meets the standard, operating according to the step S5); or
S822) firstly operating S3) and S4, installing the transition section 300 on the foundation ring 130, then planting the steel bars 121 and pouring concrete on the surface of the base platform 110 on and around the upper platform 120 on the upper platform 120, so that a new upper platform 120 ' wrapping the original upper platform 120 is formed on the base platform 110, burying the connecting part of the transition section 300 and the foundation ring 130 in the top of the new upper platform 120 ', after the concrete of the new upper platform 120 ' is solidified and the strength meets the standard, arranging at least one annular pre-tightening force ring 122 on the periphery of the new upper platform 120 ', drilling a stress cable hole and arranging a longitudinal pre-stress cable 123 at the connecting part of the original upper platform 120 and the base platform 110 on the new upper platform 120 ', then performing stress tensioning and hole sealing grouting on the pre-stress cable 123, and after the concrete in the stress cable hole is solidified and the strength meets the standard, operating according to the step S5);
s83), if the analysis result is that the foundation ring embedded in the upper stage is loose and the bearing capacity of the upper stage embedded with the foundation ring is not satisfactory due to an unstable condition, then reinforcing the foundation ring and the upper stage by using the reinforcing piers, the reinforcing columns and the steel bars, and the method shown in the schematic structural diagram of reinforcing the foundation ring and the upper stage by using the reinforcing piers, the reinforcing columns and the steel bars, the tightening rings and the stress cables in the method for recycling the wind turbine foundation provided by the embodiment of the present invention in fig. 8:
s831) firstly operating S811) or S812) to reinforce the foundation ring 130, then performing S821) or S822) to reinforce the upper platform 120, and finally operating S5) to finish the reuse of the fan foundation.
From the above description, it can be seen that:
firstly, the method for recycling the wind turbine foundation provided by this embodiment is to perform analysis and evaluation according to the updating and modifying design requirements by performing appearance quality, stability, material performance and file record data on the wind turbine foundation of the wind turbine generator to be updated and modified after the transition section connecting the foundation ring of the wind turbine foundation and the updating and modifying wind turbine tower is manufactured, and then, according to the evaluation conclusion, or directly connecting the transition section on the foundation ring and fixedly connecting the updating and modifying wind turbine tower on the transition section, and then installing the updating and modifying wind turbine generator on the updating and modifying wind turbine tower, thereby completing the recycling of the wind turbine foundation; or
After completing operations such as stability restoration, appearance restoration, bearing capacity improvement restoration and the like, the fan foundation recycling method provided by the embodiment connects the transition section to the foundation ring and connects and fixes the updated and modified fan tower frame to the transition section, so as to complete the recycling of the fan foundation; or also or
The method for recycling the wind turbine foundation provided by the embodiment includes the steps that after a foundation ring is connected with a transition section, operations such as bearing capacity lifting repair and the like are performed, and on the basis, the installation of a wind turbine tower and a wind driven generator is completed, so that the wind turbine foundation is recycled;
secondly, the method for recycling the wind turbine foundation provided by the embodiment solves the problem that the shape and the size of the foundation ring of the wind turbine tower frame which is usually updated and modified are not matched with those of the original wind turbine foundation through the design, the manufacture and the use of the transition section, can complete the updating and the modification of the wind turbine without re-establishing a new wind turbine foundation after the problems of the stability, the appearance, the bearing capacity and the like of the original wind turbine foundation are completed, realizes the recycling of the original wind turbine foundation, has simple process and strong adaptability, can greatly save the investment of the land resource and the updating and the modification of the wind turbine, accelerates the progress of the updating and the modification of the wind turbine, shortens the construction period, protects the environment, and can provide better social benefit while ensuring the economic benefit;
thirdly, the fan foundation recycling method provided by the embodiment of the invention analyzes and evaluates according to the appearance quality, stability, material performance and file record data of the original fan foundation and the requirements of updating and reforming design, according to the evaluation conclusion, after the original fan foundation is directly recycled through the transition section or the stability repairing operation, the appearance repairing operation and the bearing capacity improving repairing operation are carried out on the original fan foundation, the original wind turbine foundation is recycled through the transition section, the method is various, the measures are proper, the original wind turbine foundation can be fully utilized, the safety of the wind turbine generator after being updated and modified can be fully ensured, thereby saving land resources, updating and transforming capital, protecting environment, ensuring economic benefit, the purpose of recycling the fan foundation with better social benefits is provided, so the fan foundation recycling method has great popularization and application values.
During the description of the above description:
the description of the terms "this embodiment," "an embodiment of the invention," "as shown at … …," "further," "as an alternative," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention;
in this specification, the schematic representations of the terms used above are not necessarily for the same embodiment or example, and the particular features, structures, materials, or characteristics described, etc., may be combined or brought together in any suitable manner in any one or more embodiments or examples;
furthermore, those of ordinary skill in the art may combine or combine features of different embodiments or examples and features of different embodiments or examples described in this specification without undue conflict.
Finally, it should be noted that:
although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made on the technical solutions described in the foregoing embodiments, or some or all of the technical features of the embodiments can be equivalently replaced, and the corresponding technical solutions do not depart from the technical solutions of the embodiments of the present invention.

Claims (5)

1. A fan foundation recycling method is used for updating and transforming a wind turbine;
the wind turbine generator set comprises a fan foundation, a fan tower constructed on the fan foundation and a wind driven generator installed on the fan tower;
the fan foundation recycling means that the fan foundation of the existing wind turbine generator set is used for updating and transforming a wind driven generator and a corresponding matched fan tower, so that the installation requirements of the wind driven generator and the corresponding matched fan tower on the fan foundation after updating and transformation are met;
the fan foundation comprises a base station of a reinforced concrete structure and an upper platform of the reinforced concrete structure arranged on the base station, a steel structure foundation ring used for connecting and installing the fan tower is arranged on the upper platform, the part of the foundation ring is embedded in the upper platform, and a foundation flange is arranged at the bottom of the foundation ring embedded in the upper platform;
the method is characterized by comprising the following steps:
s1) designing and manufacturing a transition section capable of being connected with the foundation ring and the bottom of the fan tower according to the shape and the size of the bottom of the fan tower which is updated and reconstructed;
s2) checking and verifying the appearance quality, stability, material performance and archival record data of the wind turbine foundation;
s3) analyzing and evaluating the appearance quality, stability, material performance and archival data of the wind turbine foundation and the appearance quality, stability and bearing capacity of the wind turbine foundation required by the wind turbine generator and the wind turbine tower which are updated and modified according to the design requirements of updating and modifying, and performing the following operations according to the evaluation conclusion, wherein:
s31) the assessment conclusion is satisfactory, the following steps S4) and S5) are carried out;
s32), when the evaluation conclusion is that the stability is not satisfactory, carrying out stability repairing operation, and after the stability is satisfactory, carrying out the following steps S4) and S5);
s33), when the evaluation conclusion is that the appearance quality does not meet the requirement, performing appearance repairing operation, and after the appearance quality meets the requirement, performing the following steps S4) and S5);
s34), carrying out bearing capacity lifting repair operation when the evaluation conclusion is that the bearing capacity is not qualified, and completing the following steps S4) and S5) during or after the bearing capacity lifting repair operation;
s4) mounting and connecting the manufactured transition section on the foundation ring;
s5) connecting and fixing the updated and modified wind turbine tower on the transition section, and installing the updated and modified wind driven generator on the wind turbine tower, namely completing the recycling of the wind turbine foundation.
2. The wind turbine foundation recycling method of claim 1, wherein the analyzing and evaluating in the step of S3) comprises the steps of:
s30) according to the national wind turbine installation standard and the foundation construction standard, visual observation, a concrete resiliometer, a steel structure strength detection device and a finite element analysis method are adopted to evaluate the appearance quality, the stability and the bearing capacity of the wind turbine foundation.
3. The wind turbine foundation recycling method of claim 1, wherein the stability repair operation comprises the steps of:
s6) adding and tamping backfill soil around the base platform and the upper platform until the stability of the fan foundation meets the requirements of the updating and reforming design.
4. The wind turbine foundation recycling method of claim 1, wherein the appearance repair operation comprises the steps of:
s7) evaluating the appearance quality problem of the fan foundation and operating according to the following evaluation results:
s71) if the evaluation result shows that the appearance quality problem is only that the local outer layer concrete of the fan foundation falls off, shoveling part of the outer layer concrete of the area where the outer layer concrete falls off by using a shoveling tool, then troweling the shoveled part by using cement slurry until the shoveled part is solidified and the strength meets the standard;
s72) if the evaluation result shows that the appearance quality problem is that cracks occur on the local part of the fan foundation, shoveling the partial outer layer concrete of the cracks by using a shoveling tool in the crack area, filling the cracks by using a high-pressure grouting operation method in the cracks, and troweling the surfaces of the cracks by using cement slurry until the cracks are solidified and the strength meets the standard.
5. The wind turbine foundation recycling method of claim 1, wherein the bearing capacity lifting repair operation comprises the steps of:
s8) analyzing the problem that the bearing capacity of the fan foundation does not meet the requirement, and operating according to the following analysis results:
s81) if the analysis result is that the bearing capacity is not satisfactory due to the loosening of the foundation ring embedded in the upper platform, reinforcing the foundation ring by the following method:
s811) drilling grouting holes in the upper part of the foundation flange or the outer side and the inner side of the upper part of the foundation flange on the upper platform, then injecting high-strength concrete into the grouting holes by using a high-pressure grouting operation method to form concrete reinforcing piers on the outer side or the inner side and the outer side of the upper part of the foundation flange, then filling the grouting holes with concrete, and after the concrete is solidified and the strength meets the standard; or
S812) drilling grouting holes reaching the outer side of the upper part of the foundation flange or the inner side and the outer side of the upper part of the foundation flange along the outer side of the foundation ring or the inner side and the outer side of the foundation ring on the upper platform, inserting a force transmission device into the grouting holes, injecting high-strength concrete by using a high-pressure grouting operation method to form reinforcing columns on the outer side or the inner side and the outer side of the upper part of the foundation flange, filling the grouting holes with concrete, and after the concrete is solidified and the strength meets the standard;
s82) if the analysis result shows that the bearing capacity is not satisfactory due to the unstable condition of the upper platform in which the foundation ring is embedded, reinforcing the foundation ring by the following method:
s821) firstly completing the step S4, installing the transition section on the foundation ring, then planting bars on the upper platform and the surface of the base platform around the upper platform, pouring concrete, enabling the bars to form a new upper platform wrapping the original upper platform on the base platform, burying the connecting part of the transition section and the foundation ring at the top of the new upper platform, and operating according to the step S5) after the concrete of the new upper platform is solidified and the strength of the concrete of the new upper platform meets the standard; or
S822) firstly completing S4, installing the transition section on the foundation ring, then planting bars and pouring concrete on the surface of the base platform on and around the upper platform, so as to form a new upper platform wrapping the original upper platform on the base platform, burying the connecting part of the transition section and the foundation ring in the top of the new upper platform, after the concrete of the new upper platform is solidified and the strength meets the standard, arranging at least one annular pre-tightening force ring on the periphery of the new upper platform, drilling a stress cable hole and arranging a longitudinal pre-stress cable at the connecting part of the original upper platform and the base platform on the new upper platform, then grouting after the pre-stress cable is subjected to stress tensioning, and sealing the hole, after the concrete in the stress cable hole is solidified and the strength meets the standard, operating according to S5);
s83) if the analysis result shows that the foundation ring embedded in the upper stage is loose and the bearing capacity is not satisfactory due to the unstable condition of the upper stage embedded with the foundation ring, performing reinforcement by the following method:
s831) firstly operating S811) or S812) step to reinforce the foundation ring, then performing S821) or S822) step to reinforce the upper platform, and finally operating S5) step to finish the reutilization of the fan foundation.
CN202010308463.XA 2020-04-18 2020-04-18 Fan foundation recycling method Active CN111486060B (en)

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