JP2005220715A - Prestressed concrete prefabrication construction method for wind power generation tower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wind power generation tower having high strength and durability, recyclable, and maintenance-free for a long period. <P>SOLUTION: The skeleton of the wind power generation tower is prefabricated by concrete (RC). The weight of the skeleton is reduced by combining PC steel bars with a high strength concrete (PC), and high tension bolts and external wall embedded plugs are used as skeleton joints. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention solves various problems in steel, cast-in-place concrete, and existing RC prefabs by converting a prefabricated body such as a wind power generation tower into an RC prefab by a new construction method.

The conventional steel wind power generation tower construction method has been prefabricated and is excellent in quality control and on-site construction, but there are problems with durability and rigidity, causing damage due to contact with wind blades and damage due to typhoons, etc. Many problems such as increased maintenance costs due to corrosion and deterioration of external coating have occurred.
In addition, the on-site concrete method is durable, but all work including incidental work is on-site work, so the construction period is inevitably long, it is difficult to ensure construction accuracy and quality in harsh working environments, and materials can hardly be recycled, etc. There is a problem.
In addition, since the existing RC prefabrication method requires a cast-in-place concrete work at the joint, the prefab effect at the corner is also limited in addition to the onsite construction of the incidental equipment.
In addition, the construction accuracy depends on the site environment, and there are problems such as difficulty in recycling materials.
Therefore, the current situation is that there is no definitive construction method, each with advantages and disadvantages.

First of all, we will identify the problems of the current wind power tower construction methods.
(A) The steel tower method has problems in rigidity, strength and durability, and there is even a danger of collapse, and maintenance costs due to corrosion and exterior deterioration will be enormous in the long term.
(B) In the on-site concrete method, incidental equipment construction and the like are all on-site work, and it is difficult to ensure construction accuracy and quality in a harsh working environment and cannot be recycled.
(C) The existing RC prefabrication method has a cast-in-place concrete for joining prefabricated members, so that the effect is limited and construction is difficult. Also, it is difficult to recycle components.

In order to ensure the rigidity, strength and durability that are the disadvantages of steel towers, concrete can be used, and the accuracy and quality of construction, which are the disadvantages of concrete, are prefabricated for all factories, including incidental equipment, as well as steel. I think it will be solved.
Also, the dimensions of the members should be stored in a size that allows for trailer transportation, and the total weight may be reduced while ensuring strength with a combination of high-strength concrete and PC steel.
In the new construction method, sufficient strength can be secured with high-strength bolts in the joint method, so that no external scaffold is required, and simplification of on-site construction is achieved.
Above all, it is especially important that the prefabricated material can be easily recycled because the new method is easy to install, remove and dismantle, and does not damage the components.

The RC prefabrication by the new construction method enables mass production of high-accuracy and high-quality wind power generation towers, enabling rapid construction of facilities according to demand.
Regardless of the size of the wind power generation tower, RC prefabrication by the new method is not only recyclable, but the same method can be applied to communication towers and transmission towers.
Moreover, in areas where there are many typhoons, gusts, acid rain and salt damage, it can be replaced with a steel tower that has a long-term maintenance cost.
RC prefabrication with high durability and high strength is effective only in the harsh natural environment of the Japanese archipelago where many typhoons pass and coastal areas.

The RC Prefab Tower by the new construction method exhibits weather resistance and durability not found in steel towers even in areas where typhoons pass or coastal areas where there is a lot of salt damage.
In addition, it is easier to install and dismantle than a steel tower for construction, so it can respond quickly to urgent demand.
In recent years, the size of wind power generation towers has been increasing from the viewpoint of power generation efficiency, but this new method is easy to increase in size technically because there is no uncertainty in on-site construction.
In order to improve construction accuracy, temporary assembly is performed at the factory and then on-site delivery is carried out. This is effective for concise on-site work and cost reduction and mass recycling due to mass production.
Therefore, we would like to take advantage of the features that can respond to demand promptly with the RC prefabrication.

(1) Installation in areas with many typhoons In the limelight as an energy source with a low environmental burden, there is an example in which a steel power generation tower built in an area where typhoons easily pass has collapsed from the base due to a gust of wind.
However, RC prefabricated towers with high rigidity and strength and high durability are easy to construct, and such concerns are resolved.
(2) Installation on the sea and coastal areas Steel power generation towers installed on the sea and coastal areas require enormous costs for maintenance of exterior materials due to deterioration due to salt damage and weathering, and are resistant to rust. Maintenance-free is possible with a highly durable RC prefab tower.
(3) Installation in small remote islands The power generation facilities on the remote islands are relatively expensive to construct, but the RC prefab tower is built with high-quality ones by mass production with incidental facilities. it can.

The design technology in this case is not limited to tower-like structures, but can be applied to joints such as outer walls and large span floors of high-rise buildings.
Sufficient strength can be secured by engaging concrete with high-strength bolts without using mortar or the like for the concrete connection part on site. In addition, the embedded plug eliminates the need for an external scaffold, and the outer wall can be attached from the inside.

    It is sectional drawing which understands the outline | summary of a wind power generation tower, and the inside of a tower.     It is a detailed figure which understands the mode of RC prefabricated junction.     It is detail drawing which understands the mode of the RC prefab tower leg.

Explanation of symbols

1. Wind generator 11. High-strength concrete Rotating blade 12. Foundation bolt 3. Nasser 13. Base plate 4. Tower enclosure 14. 4. Screw-in type high strength bolt Mandore 15. 5. Bolt receiving embedded plug Operation stage 16. PC steel receiving end plate 7. Lifting ladder 17. Clearance 8. Wind turbine tower foundation 18. Bolt washer 9. Spiral rebar 19. Galvanized coating 10. PC steel

  The present invention can solve all the problems of the existing construction method at once by the new construction method of converting the wind power generator tower into the RC prefabrication of the entire amount.

Conventional steel wind power generator towers have become prefabricated and have excellent quality control and on-site construction. However, they have fundamental durability and rigidity, and damage due to blade contact or collapse damage due to typhoons, etc. There are many problems such as the occurrence of maintenance costs due to corrosion and deterioration.
Next, on-site concrete towers are durable, but all work, including incidental work, is inevitably long, and the construction period is inevitably long, making it difficult to ensure construction accuracy and quality in harsh working environments, and almost no material recycling is possible. Is the problem.
In addition, the RC prefabrication method has many on-site concrete constructions and equipment constructions for joints, and the prefabrication effect is limited. Furthermore, because there are problems such as difficulty in recycling the materials, there are merits and demerits in each method, and there is no definitive method at present.

First, we will identify the problems of the current wind power tower construction methods.
(A) The steel tower method is fundamentally a problem of rigidity, strength and durability, and there is a risk of collapse.
In addition, maintenance costs due to corrosion and deterioration are enormous.
(B) The on-site concrete method is an on-site work including incidental equipment work, and it is difficult to ensure construction accuracy and quality, and there are problems such as the inability to recycle the materials used.
(C) The existing RC prefabrication method requires on-site concrete and equipment construction for joining the members, and the effect is limited. Also, recycling of the members is difficult.

In order to ensure the rigidity, strength and durability that are the disadvantages of steel towers, concrete is the best, and the accuracy and quality assurance, which are disadvantages of concrete, are all, including incidental facilities. This will be solved by making the factory prefabricated.
If the high strength concrete and the PC steel are combined in a member size that can be transported by the trailer, the total weight can be reduced while securing the strength.
Since the joint portion of the present invention uses a screw-in type high-strength bolt, an external scaffold is not required and the on-site process is greatly reduced.
In particular, the present invention is easy to install and remove and dismantle, and it is important that the used members can be easily recycled because the members are not damaged.

The present invention enables mass production of high-precision and high-quality wind power towers. In addition, standardization has the advantage of being able to respond quickly to urgent demand.
The RC prefabrication of the new construction method makes it easy to recycle parts, and if the same construction method is diverted, it is possible to replace the communication tower and power transmission tower.
Also, in areas where there are many typhoons, gusts, acid rain and salt damage, the steel tower can be replaced with a huge maintenance cost.
The new construction method with excellent durability and high strength is effective in the harsh natural environment of the Japanese archipelago where many typhoons pass and coastal areas.

The present invention exhibits weather resistance and durability not found in existing towers even in areas where typhoons pass or coastal areas where there is a lot of salt damage.
Moreover, since installation and dismantling are easier than the steel tower in terms of construction, it is possible to respond quickly to urgent demand.
In recent years, wind power generator towers have been increasing in size in terms of power generation efficiency, but this new method is easy to increase in size technically because uncertain on-site work is omitted.
In addition, since on-site delivery is performed after temporary assembly at a factory in order to increase construction accuracy, on-site processing is easy, and cost reduction and material recycling effects due to mass production are large.
Therefore, an inexpensive and high-quality wind power generator tower can be easily spread by the present invention.

(1) Installation in areas with many typhoons While wind power generation is in the limelight as an energy source with low environmental impact, there are cases where steel power towers built in areas where typhoons pass have collapsed from the roots due to gusty winds. . However, the present invention having high rigidity and strength and high durability is easy to construct, and such a concern is solved.
(2) Installation on the sea and coastal areas Although the maintenance costs associated with deterioration and weathering of steel power generator towers installed on the sea and coastal areas due to salt damage, etc. become enormous, maintenance free is also possible with the present invention. Become.
(3) Installation on small and remote islands Although power generation facilities on remote islands tend to be expensive for construction on a small scale, in the case of the present invention, inexpensive and high-quality facilities can be quickly produced by mass production including incidental facilities. Can be built.

The joint portion of the present invention is not limited to tower-like structures, but can be applied to, for example, outer walls of high-rise buildings and large span structures.
The mortar is not used for the concrete connection part in the field, and the PC joints are engaged with each other and screwed high-strength bolts are joined. That's why.

      It is sectional drawing which understands the outline | summary of a 60M class wind power generation tower.       It is detail drawing which understands the member junction part of this invention.       It is detail drawing which understands the junction part of a power generation tower foundation and a frame.

Explanation of symbols

1. Wind generator 11. High strength concrete Rotating blade 12. Foundation bolt 3. Nasser 13. Base plate 4. Tower-14. 4. Screw-in type high strength bolt Mandore 15. 5. Bolt receiving embedded plug Operation stage 16. PC steel receiving end plate 7. Elevating ladder 17. Clearance 8. Wind turbine tower foundation 18. Bolt washer 9. Spiral rebar 19. Galvanized coating10. PC steel

  In the present invention, the wind power generator tower and the incidental facilities are RC prefabricated by a new construction method, and the problems of the existing construction method are solved at once.

While conventional steel wind power generator towers are becoming prefabricated and excellent in quality control and on-site construction, there are difficulties in rigidity and durability, which may cause damage due to blade contact, collapse due to typhoons, etc. Have problems such as large maintenance costs. Further, the lack of rigidity of the steel tower is a factor that causes resonance with the blade.
Next, the on-site RC wind power generator tower has a long construction period including incidental equipment construction, it is difficult to ensure construction accuracy and quality, and material recycling is almost impossible.
Furthermore, the existing RC prefabrication method has many problems such as on-site concrete hitting and incidental equipment construction, and the prefab effect is limited and it is difficult to recycle the members.
In other words, none of the construction methods is a definitive construction method, and it can be understood that the construction method for further standardizing the RC prefab is superior in rigidity and durability and is closest to the solution.

(A) The steel tower construction method has problems in terms of rigidity and durability and has a risk of collapsing, and also has problems such as long-term maintenance costs becoming enormous.
Also, the lack of rigidity is a factor causing dangerous resonance with the blade.
(B) The on-site RC method is an on-site work including incidental equipment construction, and it is difficult to ensure construction accuracy and quality, and it is almost impossible to recycle.
(C) Since the existing RC prefabrication method requires on-site RC driving and equipment construction, the labor saving effect is limited and resource recycling is difficult.

Insufficient rigidity of the steel wind power generator tower tends to cause the natural period of the casing and blade to coincide with each other, which may cause dangerous resonance. However, the RC prefab solves the lack of rigidity.
In addition, ensuring corrosion resistance and durability can be solved by RC prefabrication including incidental facilities. In other words, the combination of PC bar and high-strength RC greatly reduces the weight of the chassis and fits it in a size and weight that can be transported in a 40-foot standard container.
In addition, since the external joint is not required for the frame joint due to the high-tensile bolt and the embedded plug, the construction period is shortened and the problems including resource recycling are solved all at once.
In particular, the present invention has features such as facilitating on-site installation and dismantling / removal work, and the ability to recycle resources and reuse the members because they do not damage the members.

High-precision, high-quality wind power towers will be RC prefabricated, enabling construction of new energy facilities that are pollution-free and inexpensive.
The present invention is not only excellent in terms of resource recycling, but also applicable to other fields such as exhaust towers, chimneys, communication towers and power transmission towers, especially in areas where there are many typhoons, gusts, acid rain and salt damage. This is a construction method that can be used instead of a tower.
In other words, it exhibits particularly excellent performance in the natural environment of the Japanese archipelago where there are many typhoons and coastal areas, and it can be used for CO2 emissions trading (C & T) to prevent global warming if you look overseas. There is also.

This new technology method has features that are more compact, highly functional, and superior in durability, but it can be quickly installed and dismantled on the construction side to meet demand quickly.
In recent years, the size of towers has been increasing from the viewpoint of power generation efficiency, and it is easy to respond to these, and the construction accuracy is high. large.
Therefore, this prefabricated construction method enables construction of a low-priced, high-function, pollution-free new energy facility not only in Japan but also in developing countries that lack energy resources and lack social capital.

(1) Installation in areas with many typhoons In recent years, there are cases where steel power generator towers in areas where typhoons pass have collapsed from the roots due to gusts, but there is no concern for the RC prefabrication method, which has excellent rigidity and durability.
(2) Installation on the sea and coastal areas Especially in the sea and coastal areas where installation is expected in the future, especially steel power generation towers require huge maintenance costs to prevent deterioration and weathering due to salt damage.
However, this RC prefabrication method allows maintenance free of the housing.
(3) Installation on small and remote islands Although the construction costs of power generation facilities on remote islands are small, construction costs can be set up using standard container transport, including incidental facilities, if the present invention is used. Become.
(4) In developing countries lacking resources and social capital in developing countries, it is possible to achieve both environmental conservation and social capital development by constructing new energy facilities with low environmental impact.
This power generation facility construction is particularly effective in terms of CO2 emission trading (C & T).

The joint plug technology that eliminates the need for external scaffolding and the joining technology that allows all parts to be mounted on standard containers can be used for the production and transportation of other large-scale steel frames.

    It is sectional drawing which understands the outline | summary of a 60M class wind power generation tower.     It is detail drawing which understands the joint point of a power generation tower housing.     It is detail drawing which understands the joint point of a power generation tower foundation and a power generation tower frame.

Explanation of symbols

1. Wind generator 11. High strength concrete Rotating blade 12. Foundation bolt 3. Nasser 13. Base plate 4. Tower-14. 4. High tension bolt Mandore 15. Embedded plug 6. Operation stage 16. PC steel bar receiving end plate 7. Elevating ladder 17. Rib plate 8. Wind turbine tower foundation 18. 8. Embedding plate Spiral rebar 19. Bolt washer 10. PC bar 20. Galvanized paint
21. Removable lightning rod

  The present invention solves the technical and economic problems of the existing method at once by making the wind power tower a PC prefab.

Conventional steel wind power generator towers have become prefabricated and are excellent in quality control and construction, but have difficulties in rigidity and durability, fear of damage due to blade contact, collapse due to typhoons, etc., and long-term However, there are problems such as huge maintenance costs. Further, the lack of rigidity of the steel tower also causes a resonance with the blade.
Next, the on-site RC construction method has a long construction period including incidental equipment construction, it is difficult to ensure construction accuracy and quality, and it is almost impossible to recycle parts.
Furthermore, the existing RC prefabrication method has many on-site concrete strikes and incidental equipment construction, and there is a problem that the prefab effect is limited and it is difficult to recycle the members.
That is, none of them is a definitive construction method, and it can be seen that the construction method that evolves and standardizes the PC prefab is excellent in rigidity and durability and is economically close to the solution.

(A) The steel tower construction method has problems in terms of rigidity and durability, has a high risk of collapse, and has problems such as enormous maintenance costs in the long term.
Also, the lack of rigidity is a factor causing dangerous resonance with the blade.
(B) The on-site RC method is an on-site work including incidental equipment construction, and it is difficult to ensure construction accuracy and quality, and it is almost impossible to recycle.
(C) Since the existing RC prefabrication method requires on-site RC driving and equipment construction, the labor saving effect is limited and recycling is difficult.

The lack of rigidity and strength of steel wind power towers, as well as ensuring corrosion resistance and durability can be solved by standardization including auxiliary equipment and PC prefabrication.
In other words, the combination of PC bar and high-strength concrete (PC) greatly reduces the weight of the housing and keeps it in a size and weight that can be transported with standard containers.
In addition, since the external joint is not required for the frame joint with high-tensile bolts and embedded plugs, the construction period is shortened and the problems including resource recycling are solved at once.
In particular, the present invention is advantageous in that on-site installation and dismantling / removal work can be facilitated, and the material can be recycled and reused because the member is not damaged.

PC prefabrication of high-precision and high-quality wind power generator towers enables construction of inexpensive and pollution-free energy facilities.
The present invention is not only excellent in terms of resource recycling, but is also applicable to other fields such as exhaust towers, chimneys, communication towers and power transmission towers, especially in areas where typhoons, gusts, acid rain and salt damage are frequent. This is a construction method that can be used instead of a tower.
In other words, it exhibits particularly excellent performance in the natural environment of the Japanese archipelago where there are many typhoons and coastal areas, and it can also be used for the Kyoto Protocol CO2 emissions trading (C & T) to prevent global warming if you look overseas.

This PC method is compact and has the features of high performance and durability, and it can be easily installed and dismantled, so it can respond quickly to urgent demand.
In recent years, an increase in the size of wind power generation facilities is ongoing in terms of power generation efficiency, but it is also easy to cope with an increase in size in a narrow area by the present invention.
By enabling standard container transportation at a lower price than anything else, the effects of construction period and cost reduction can be maximized.
In addition, a transport system using standard containers can be used regardless of whether domestic or overseas.
Therefore, it is possible to construct an inexpensive pollution-free energy facility with a CO2 emission right even in a developing country that lacks energy resources and lacks social capital and factory facilities.

(1) Installation in areas with many typhoons In recent years, there are cases where steel power generator towers in areas where typhoons pass have collapsed from the roots due to gusts, but there is no concern for the PC prefabrication method, which has excellent rigidity and durability.
(2) Installation at sea and coastal areas In the sea and coastal areas where installation is expected in the future, steel power generation towers are expected to require enormous maintenance costs to prevent deterioration and weathering due to salt damage.
However, this PC prefabrication method realizes maintenance free of the housing.
(3) Installation on small and remote islands Although the construction costs of power generation facilities on remote islands are small, construction costs can be set up using standard container transport, including incidental facilities, if the present invention is used. Become.
(4) In developing countries lacking resources and social capital in developing countries, new energy facilities with less environmental impact can be created without factory equipment, so it is possible to enhance social capital development.
This pollution-free power generation facility construction is particularly effective in the Kyoto Protocol CO2 emissions trading (C & T).

The use of the embedded plug method eliminates the need for an external scaffold, and the technical technique that enables all members to be mounted on a standard container can be used for processing and transporting other large-scale structures.

    It is sectional drawing which understands the outline | summary of a 60M class wind power generation tower.     It is detail drawing which understands the joint point of a power generation tower housing.     It is detail drawing which understands the joint point of a power generation tower foundation and a power generation tower frame.

Explanation of symbols

1. Wind generator 12. Foundation bolts 2. Rotating blade 13. 2. Base plate Nasser 14. High tension bolt (HTB)
4). Tower-body 15 Embedded plug 5. Mandore 16. PC steel bar receiving end plate 6. Operation stage 17. Rib plate 7. Elevating ladder 18. Embedded plate 8. Wind turbine tower foundation 19. Bolt washer 9. Spiral rebar 20. Galvanized coating10. PC bar 21. 10. Removable lightning rod High strength concrete (PC) 22. Joint plate

Claims (6)

Technology to convert all wind turbine towers into concrete (RC) prefabs. A technology that reduces the weight by combining high-strength concrete and PC steel using the RC prefabrication method for wind power generation towers. A technology that uses high-strength screw bolts to join RC prefabricated members of wind power towers, making installation and disassembly easier. A technology that eliminates the need for external scaffolding by providing embedded plugs for bolts at the RC prefabricated joints of wind turbine towers. A technology that recycles and uses the entire RC prefabricated material for wind power tower construction (installation and demolition). Technology to make maintenance-free communication towers and transmission towers by using RC prefabs.

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