Reinforcing and transforming structure of existing fan ribbed beam foundation with large size instead of small size

Abstract

The utility model discloses a reinforcing and transforming structure of an existing fan ribbed beam foundation, which is used for reinforcing and transforming a small-capacity fan ribbed beam foundation adopting a natural foundation mainly through a method of increasing the thickness of a bottom plate, a steel bar planting construction technology and increasing foundation piles on the premise that the original fan foundation is not dismantled. And the improved new foundation can meet the requirements of a fan with larger single unit capacity on the structural bearing capacity and the foundation bearing capacity. When the existing fan ribbed beam foundation provided by the utility model is reinforced and reformed by replacing a large size with a small size, a method for reinforcing the existing fan ribbed beam foundation by adding the foundation piles is adopted, so that the workload of breaking and removing the original fan foundation is avoided, the original fan foundation is utilized to the maximum extent, the energy is saved, the environment is protected, the wet operation workload of concrete is reduced, and the construction cost is reduced. The difficulty of concrete transportation at a remote fan position is reduced, the construction period is shortened, the construction cost is saved, the bearing capacity of the foundation can be greatly improved by adopting foundation pile reinforcement, and the requirement of a fresh air ventilator for the foundation can be well met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wind power generation, specifically relates to a structure that increases foundation pile to reinforce when reinforcing and reforming the rib beam foundation of existing wind turbine in a big for a small way. BACKGROUND

[0002] With the increasingly prominent global environmental problems, countries pay more and more attention to the development of new energy industry, and wind resources, as a kind of clean and renewable energy, have made great progress in China.In recent years, China's wind power industry has made rapid progress, wind turbine technology has been continuously improved, wind turbine installation scale has been increasingly expanded, and single machine capacity has been continuously increased.How to use the existing wind turbine in a big for a small way to more reasonably utilize the developed wind resources has very important economic significance.

[0003] As the main bearing part of wind turbine generator set, the wind turbine foundation has various forms, and the rib beam type wind turbine foundation is widely applied due to the significant advantages of greatly saving the amount of concrete and reducing the cost.When the existing wind turbine is replaced in a big for a small way, the obvious characteristics of the new wind turbine are that the tower diameter is larger, the hub is higher, the blade is longer, and the load transmitted to the wind turbine foundation is also larger, so the original rib beam type wind turbine foundation obviously cannot meet the requirements of the new wind turbine on structural bearing capacity and tower installation, and needs to be reinforced and reformed, how to maximize the use of the original wind turbine foundation to save project funds and save construction period has become a problem to be solved in the reinforcement and reform of the wind turbine in a big for a small way. CONTENT OF UTILITY MODEL

[0004] In view of the technical problems existing in the above-mentioned reinforcement and reform of the existing wind turbine in a big for a small way, the utility model aims to provide a structure that increases foundation pile to reinforce the rib beam foundation of the existing wind turbine in a big for a small way.

[0005] The utility model aims to realize the following technical scheme.

[0006] A reinforcement and reform structure of the rib beam foundation of the existing wind turbine in a big for a small way, comprising an original wind turbine foundation column, an original wind turbine foundation bottom plate is arranged on the outer circumference of the original wind turbine foundation column, an original wind turbine foundation ring beam is arranged on the outer side of the original wind turbine foundation bottom plate, and a plurality of original wind turbine foundation rib beams are arranged above the original wind turbine foundation bottom plate, and each original wind turbine foundation rib beam extends in the radial direction with the original wind turbine foundation column as the center;

[0007] An expanded foundation column is arranged on the outer circumference of the original wind turbine foundation column, a thickened bottom plate is arranged above the original wind turbine foundation bottom plate, and a plurality of foundation piles are arranged below the original wind turbine foundation bottom plate, and the tower of the new wind turbine is fixed to the expanded foundation column through new foundation bolts.

[0008] The original wind turbine foundation bottom plate is circular, octagonal or dodecagonal.

[0009] The original fan foundation rib beam is equal cross-section or variable cross-section.

[0010] The foundation pile is a cast-in-place pile or a prefabricated pipe pile.

[0011] The new fan tower drum is a steel tower drum or a prefabricated concrete tower drum; the enlarged foundation column is provided with a positioning embedded iron.

[0012] The enlarged foundation column is provided with first ring and vertical steel bars, and the thickened bottom plate is provided with second ring and vertical steel bars.

[0013] The shear steel bars are arranged on the contact surface between the original fan foundation bottom plate and the thickened bottom plate; the column anchoring steel bars are arranged between the original fan foundation column and the enlarged foundation column; the first ring and vertical steel bars, the second ring and vertical steel bars, the shear steel bars and the column anchoring steel bars are hot-rolled ribbed steel bars or threaded steel bars for prestressed concrete.

[0014] The beneficial effects of the utility model are that: the utility model provides a reinforcing reconstruction structure for the existing fan rib beam foundation by using large to replace small, which not only eliminates the work load of demolishing the original fan foundation, maximally utilizes the original fan foundation, is more energy-saving and environment-friendly, reduces the wet work load of concrete, reduces the difficulty of concrete transportation for remote or mountainous fan sites, saves project funds and construction period, and the foundation bearing capacity is greatly improved by using the foundation pile reinforcement, and the requirements of the new fan on the foundation can be well met. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a plan view of the reinforcing of the circular rib beam type fan foundation structure;

[0016] Figure 2 is a plan view of the reinforcing of the regular octagonal rib beam type fan foundation structure;

[0017] Figure 3 is a sectional view of the reinforcing of the rib beam type fan foundation structure;

[0018] Figure 4 is a positioning embedded iron distribution schematic view. DETAILED DESCRIPTION

[0019] The utility model is not limited by the following embodiments, and the specific implementation mode can be determined according to the technical scheme of the utility model and the actual situation.

[0020] The utility model provides a reinforcing reconstruction structure for the existing fan rib beam foundation by using large to replace small, which not only eliminates the work load of demolishing the original fan foundation, maximally utilizes the original fan foundation, is more energy-saving and environment-friendly, reduces the wet work load of concrete, reduces the difficulty of concrete transportation for remote or mountainous fan sites, saves project funds and construction period, and the foundation bearing capacity is greatly improved by using the foundation pile reinforcement, and the requirements of the new fan on the foundation can be well met. Figure 1 , 2As shown, including the original fan foundation column 4, the outer circumference of the original fan foundation column 4 is provided with the original fan foundation bottom plate 1, the outer side of the original fan foundation bottom plate 1 is provided with the original fan foundation ring beam 2, and a plurality of original fan foundation rib beams 3 are arranged above the original fan foundation bottom plate 1. Each original fan foundation rib beam 3 extends in the radial direction with the original fan foundation column 4 as the center.

[0021] The outer circumference of the original fan foundation column 4 is provided with an enlarged foundation column 6, that is, the radius of the original fan foundation column 4 is increased. The thickened bottom plate 5 is arranged above the original fan foundation bottom plate 1, and a plurality of foundation piles 16 are arranged below the original fan foundation bottom plate 1. The foundation after reinforcement and reconstruction meets the requirements of the new fan on structural bearing capacity, foundation bearing capacity and installation of the new fan tower 12 through the increased foundation piles 16, the thickened bottom plate 5 and the enlarged foundation column 6.

[0022] Further, the original fan foundation bottom plate 1 can be circular, regular octagonal, regular dodecagonal or any other shape. Figure 1 It is circular, Figure 2 It is regular octagonal.

[0023] Further, the original fan foundation rib beam 3 can be equal cross section or variable cross section.

[0024] Further, the original fan rib foundation after reinforcement and reconstruction adopts the scheme of adding foundation piles, the foundation piles 16 can adopt cast-in-place piles or prefabricated pipe piles, and the number and length of the piles are determined according to the bearing capacity requirement.

[0025] Further, the new fan tower 12 is a steel tower or a prefabricated concrete tower; the new fan tower 12 is fixed to the enlarged foundation column 6 through new anchor bolts 13, the enlarged foundation column 6 is provided with a positioning embedded iron 15, the positioning embedded iron 15 can be arranged according to the installation requirement of the new anchor bolts 13, the length of the anchoring reinforcement of the positioning embedded iron 15 is determined according to the bearing capacity; the height and width of the enlarged foundation column 6 are determined according to the structural bearing capacity calculation, positioning of the new anchor bolts 13 and installation size requirement of the new fan tower 12.

[0026] Further, the first ring and vertical reinforcement 8 is arranged in the enlarged foundation column 6, and the second ring and vertical reinforcement 7 is arranged in the thickened bottom plate 5, so that the ring and radial reinforcement is increased in the enlarged foundation column 6 and the thickened bottom plate 5 through construction technologies such as anchoring, welding or mechanical connection, so that the newly added stress reinforcement is reliably anchored.

[0027] Furthermore, shear reinforcement 9 is provided on the contact surface 10 between the old and new concrete between the original wind turbine foundation slab 1 and the thickened foundation slab 5; and column anchoring reinforcement 11 is provided between the original wind turbine foundation column 4 and the expanded foundation column 6 to ensure reliable bonding of the newly added concrete. The first circumferential and vertical reinforcement 8, the second circumferential and vertical reinforcement 7, the shear reinforcement 9, and the column anchoring reinforcement 11 are hot-rolled ribbed steel bars or threaded steel bars for prestressed concrete. The total reinforcement area and steel bar diameter are determined according to calculations and structural requirements, and the steel bar diameter is generally 16~32mm. This ensures that the concrete strength grade of the thickened foundation slab 5 and the expanded foundation column 6 should be higher than that of the original foundation concrete, generally not lower than C40.

[0028] Furthermore, the thickness of the thickened base plate 5 should be determined based on the structural bearing capacity calculation.

[0029] The reinforcement construction method of this utility model is as follows:

[0030] 1. When using pile reinforcement, according to the positioning of the newly added pile 16, first drill holes in the original wind turbine foundation plate 1, then use a pile construction drilling rig to drill holes in the soil layer at the corresponding position and clean the holes, place the tied steel cage in the pile hole, reserve anchoring steel bars at the top of the pile, and pour concrete.

[0031] 2. Using the rebar anchoring construction technology, a second ring and vertical rebar 7 are added. Alternatively, the concrete inside the original foundation ring beam and the upper edge of the bottom slab can be removed to expose the main load-bearing rebar in the original foundation. The newly added second ring and vertical rebar 7 and shear rebar 9 are welded to the exposed rebar, so that the new foundation bottom rebar is reliably anchored to the original wind turbine foundation concrete.

[0032] 3. For example Figure 3 As shown, the anchor bolts 13 for the installation of the new air turbine tower 12 are laid by welding and fixing the embedded iron 15 using construction techniques such as rebar anchoring.

[0033] 4. The first circumferential and vertical reinforcing bars 8 inside the foundation column 6 are increased and enlarged by using rebar anchoring construction technology;

[0034] 5. Use rebar anchoring technology to increase the shear reinforcement 9 of the new and old concrete contact surface 10, and roughen the new and old concrete contact surface 10 to a certain extent.

[0035] 6. Using the rebar anchoring construction technique, add circumferentially distributed column anchoring steel bars 11 to the top of the original wind turbine foundation column 4. They can also be welded to the exposed section of the original wind turbine pre-embedded anchor bolts 14 to enhance the connection between the old and new concrete and improve the load-bearing capacity.

[0036] 7. After the rebar installation is completed, the load-bearing capacity of the rebar must be tested to ensure reliable construction quality.

[0037] 8. Binding other new non-planting steel bars in the new air blower foundation, and brushing interface agent on the contact surface 10 between the new and old concrete, then pouring the thickened bottom plate 5 and the concrete of the enlarged foundation column 6;

[0038] 9. Finally, after the strength of the new foundation concrete reaches the requirement, the formwork is removed, the foundation pit is backfilled, and the next process of air blower installation is waited.

[0039] The above is only the preferred embodiment of the present application, and is not a limitation on the technical scheme of the present application. It should be pointed out that those skilled in the art can make further improvements and changes under the premise of the technical scheme of the present application, and these improvements and changes should be covered in the protection scope of the present application.

Claims

1. A reinforcement and renovation structure for existing wind turbine rib beam foundations, characterized by replacing smaller ones with larger ones, wherein: The original fan foundation column (4) is provided with an original fan foundation bottom plate (1) on the outer circumference, an original fan foundation ring beam (2) is arranged on the outer side of the original fan foundation bottom plate (1), and a plurality of original fan foundation rib beams (3) are arranged above the original fan foundation bottom plate (1), each of which extends in the radial direction with the original fan foundation column (4) as the center. An expanded foundation column (6) is arranged on the outer circumference of the original fan foundation column (4), a thickened bottom plate (5) is arranged above the original fan foundation bottom plate (1), and a plurality of foundation piles (16) are arranged below the original fan foundation bottom plate (1), and the new fan tower (12) is fixed to the expanded foundation column (6) through a new foundation bolt (13).

2. The retrofitting structure of claim 1, wherein the retrofitting structure is characterized by: The original fan foundation bottom plate (1) is circular, octagonal or dodecagonal.

3. The retrofitting structure of claim 1, wherein the retrofitting structure is characterized by: The original fan foundation rib beam (3) is equal-section or variable-section.

4. The retrofitting structure of claim 1, wherein the retrofitting structure is characterized by: The foundation pile (16) is a cast-in-place pile or a prefabricated pipe pile.

5. The retrofitting structure of claim 1, wherein: The new fan tower (12) is a steel tower or a prefabricated concrete tower. The expanded foundation column (6) is provided with a positioning embedded iron (15).

6. The retrofitting structure of claim 1, wherein: The expanded foundation column (6) is provided with first ring and vertical steel bars (8), and the thickened bottom plate (5) is provided with second ring and vertical steel bars (7).

7. The retrofitting structure of claim 6, wherein: The shear steel bars (9) are arranged on the new and old concrete contact surface (10) between the original fan foundation bottom plate (1) and the thickened bottom plate (5); the column anchoring steel bars (11) are arranged between the original fan foundation column (4) and the expanded foundation column (6), and the first ring and vertical steel bars (8), the second ring and vertical steel bars (7), the shear steel bars (9) and the column anchoring steel bars (11) are hot-rolled ribbed steel bars or threaded steel bars for prestressed concrete.

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