Novel pit foundation steel cylinder type foundation of wind driven generator supporting type composite tower
By designing a deep pit foundation steel cylinder foundation, combined with customized tower cylinder sections and reinforced concrete structures, the problems of complex design and high construction cost of wind turbine foundation are solved, wide structural applicability and simple construction are achieved, cost and cycle are reduced, and efficient resource utilization is promoted.
Patent Information
- Application Number
- CN202422254360.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The foundation design of existing wind turbines is complex, and there is a lack of optimization solutions suitable for supporting composite towers. The resources of traditional towers are not fully utilized after the removal of the traditional towers, resulting in high construction costs and long cycles.
A deep pit-based steel cylinder foundation is designed, and the tower cylinder sections of customized processing or dismantling units are used, combined with the reinforced concrete structure, and through multi-stage excavation, welding, pouring and other processes, a stable support composite tower is formed, and the towers of the demolition project are reused.
It achieves wide structural applicability and simplified construction, reduces project costs and cycles, improves the safety and economicality of wind power projects, and promotes efficient utilization of resources.
Smart Images
Figure CN223293069U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to wind power generation facilities, electric power, communications, construction engineering and other fields, and specifically to a new type of deep pit steel cylinder foundation of a wind turbine supporting composite tower, as well as the design and application of a deep pit steel cylinder foundation in other fields such as electric power, communications and construction engineering. Background Art
[0002] As an important structure supporting wind turbine generator sets, wind power foundations are of various types and complex in design. Each type has its own unique design concept and scope of application. With the continuous growth of global demand for clean energy and the continuous advancement of wind power technology, the design and construction of wind power foundations will directly determine the safety, economy and environmental adaptability of wind power projects. The deep pit steel cylinder foundation and construction method proposed in this utility model are a foundation form and construction process developed on the basis of the design and installation of the composite tower supporting the wind turbine. It is suitable for the tower and has the characteristics of good structural applicability and simple construction process. At the same time, it has many advantages such as using traditional towers as the main structure, making full use of the towers of the demolished project, and high-value reuse. The formulation of this solution is of great significance to the industry's energy conservation and emission reduction and promoting high-quality development of the industry. Utility Model Content
[0003] The purpose of the present utility model is to propose a new deep pit steel cylinder foundation for a supporting composite tower of a wind turbine, which takes into account the advantages of traditional tower application and tower reuse in demolition projects, and is used to solve the foundation selection problem of various types of wind turbines using supporting composite rigid towers in the background technology.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present utility model is as follows.
[0005] A new type of wind turbine supporting composite tower deep pit steel cylinder foundation includes foundation development and backfill earthwork of this type of foundation, a cushion area at the bottom of the foundation, a main reinforced concrete area, and three or more supporting composite tower bottom tower sections of the same specifications connected to the foundation.
[0006] Furthermore, the pit foundation and backfill area of the deep pit steel cylinder foundation are the excavation and backfill of the deep pit foundation, and its engineering design and construction must meet relevant industry standards and comply with the requirements of slope stability.
[0007] Furthermore, the bottom cushion area of the deep pit steel cylinder foundation adopts bottom sealing concrete with a strength grade not lower than C30.
[0008] Furthermore, three or more flange-welded cylinder bases are placed in the bottom cushion area, and the base bottom plate and the cylinder section are fixed by simply laying steel bars. The cylinder base can be processed by designing and manufacturing a new cylinder according to the basic requirements, or it can be manufactured by cutting the cylinder sections of the dismantled unit and welding the bottom plate to reduce the manufacturing cost of the foundation.
[0009] Furthermore, the main reinforced concrete area of the deep pit steel cylinder foundation is composed of a steel cone with a flange welded to the cylinder body, various types of circumferential and radial steel bars laid in the upper and lower layers, concrete poured according to the steel bar arrangement, and pre-buried cable pipes and drainage pipes reserved inside, as well as foundation settlement observation points.
[0010] Furthermore, the three or more cylinder segments inside the main reinforced concrete area, which are customized and manufactured or recycled from dismantled units, are connected to the base flange of the cushion area through high-strength bolts, and holes are opened in the cylinder wall according to the reinforcement design and steel bar laying requirements.
[0011] Furthermore, the main reinforced concrete area adopts cast concrete with a strength grade not lower than C60, and the concrete is cast and formed through internal and external formwork according to the laying conditions of the steel bars.
[0012] Furthermore, an internal manhole is reserved in the middle of each steel cylinder section in the main reinforced concrete area for daily inspection and maintenance of the main foundation, and embedded steel bars are reserved in the inner wall of the concrete as a passage ladder, and an anti-fall rope is set.
[0013] Furthermore, a settlement section measuring point is set at the center of the main reinforced concrete area, and no less than 6 equal-angle settlement observation points are set on the external concrete platform, and the main concrete operation parameters are monitored by embedded temperature sensors.
[0014] Furthermore, the bottom tower section of the supporting composite tower is a connecting tower suitable for the foundation design and construction, and the tower is not the core content of this utility model.
[0015] The novel wind turbine supporting composite tower deep pit steel cylinder foundation and construction method are used for the engineering construction of the novel foundation, which includes the following steps:
[0016] S1. Complete the deep foundation pit excavation. The diameter and depth of the foundation pit must meet the corresponding design and construction standards. A multi-stage excavation method is used for deep foundation pits. Slope stability is strictly guaranteed during the excavation process.
[0017] S2. In the cushion area at the bottom of the foundation pit, a certain thickness of bottom concrete with a strength grade not less than C30 is laid, and three or more flange-welded cylinder bases are placed and fixed on the bottom concrete;
[0018] S3. Secure the cylinder base with at least one layer of steel bars. Adjust the cylinder base to the corresponding periodic symmetrical position. Measure the horizontality and flatness of the top flange of the base and the center position of each cylinder section. Pour structural concrete with a strength grade of not less than C30 to ensure that construction conditions are met.
[0019] S4. After the concrete in the cushion area at the bottom of the foundation has cured and hardened, three or more foundation cylinder segments are hoisted sequentially to the flange end faces of the cylinder in the cushion area. Ensure that the cylinder segments are accurately positioned in the designed locations and are fixed flat on the flange end faces of the cylinder segments. Finally, high-strength bolts are used to connect the top flange of the cylinder in the cushion area and the bottom flange of the steel cylinder segment.
[0020] S5. According to the reinforcement layout design and construction requirements, penetrate and lay the internal and external axial, radial, and circumferential reinforcement of each foundation cylinder segment. After tying the reinforcement, place and secure the internal and external formwork of each foundation cylinder segment, and pour structural concrete with a strength grade of not less than C60 in the main reinforced concrete area.
[0021] S6. During the construction of the main reinforced concrete area, reserve and install cable embedded pipes and drainage pipes. Place one foundation settlement observation point in the center of the main reinforced concrete area, and place no less than six settlement observation points at equal angles on the outer concrete platform. Install temperature sensors according to operation monitoring requirements.
[0022] S7. After the main reinforced concrete area is poured and hardened, the excavated foundation pit is backfilled with soil. During this period, the settlement of the main reinforced concrete is monitored and recorded in accordance with the construction requirements. On this basis, the lifting and equipment installation of the supporting composite tower are carried out.
[0023] Compared with the prior art, the novel deep pit steel cylinder foundation of the wind turbine supporting composite tower has the following beneficial effects:
[0024] (1) The deep pit steel cylinder foundation adopts three or more cushion area bases and tower cylinder sections that are customized and manufactured or recycled from dismantled units, which can meet the design and application of the corresponding supporting composite tower foundation and has a wide range of applicability;
[0025] (2) The main structure of the deep pit steel cylinder foundation uses the tower tube section as the key structural component. It has high structural rigidity, deep overall burial depth, good stability, and reduces the amount of concrete used. The installation process of a single steel conical tower is mature, which can significantly reduce the construction and installation period and cost.
[0026] (3) The design, manufacture and installation of deep pit steel cylinder foundations and the combination of steel cone cylinder sections are flexible and convenient. In actual applications, new tower sections can be used, and for old wind farm renovation projects, local materials can be used to reuse tower sections and flanges by dismantling units, which greatly reduces the comprehensive costs of design, manufacture, transportation, construction and installation. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of a deep pit steel cylinder foundation of a supporting composite tower and an embodiment of the present invention.
[0028] Figure 2 This is a schematic structural diagram of the bottom cushion area of the deep pit steel cylinder foundation of the utility model.
[0029] Figure 3 This is a schematic diagram of the main reinforced concrete area structure and construction of the deep pit steel cylinder foundation of this utility model.
[0030] Figure 4 This is a schematic diagram of the steel bar layout and laying and binding construction in the main reinforced concrete area of this utility model.
[0031] Explanation of the accompanying symbols: 1. Foundation development and backfill earthwork; 2. Bottom cushion area; 2.1. Bottom seal concrete; 2.2. Welded cylinder base; 3. Main reinforced concrete area; 3.1. Steel cone cylinder section; 3.2. Various types of axial, circumferential and radial steel bars; 3.3. Concrete; 3.4. Cable pre-buried pipe and drainage pipe; 3.5. Foundation settlement observation point; 3.2.1. Lower steel bars; 3.2.2. Upper steel bars; 4. Tower section at the bottom of the tower. DETAILED DESCRIPTION
[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following, in combination with the drawings and specific implementation methods, further explains the embodiment of the present invention's support-type composite tower deep pit steel cylinder foundation combined with the field of wind power generation, and explains how the deep pit steel cylinder foundation suitable for this type of tower is designed and implemented.
[0033] The utility model provides a new type of wind turbine support type composite rigid tower deep pit steel cylinder foundation and its construction method, the foundation and the wind turbine tower bottom tower embodiment, such as Figure 1As shown, it includes the pit foundation and backfill area 1 of this type of foundation, the foundation bottom cushion area 2, the main reinforced concrete area 3, and three or more supporting composite tower bottom tower sections 4 of the same specifications connected to the foundation. The foundation construction is sequentially excavation of deep pit foundation and slope protection, installation and concrete pouring of bottom plate cylinder sections in the bottom cushion area, installation of cylinder sections in the main reinforced concrete area, laying and binding of steel bars, concrete pouring, construction of cable pre-buried pipes and drainage pipes, setting of settlement observation points, etc., and installation of tower tubes at the bottom of the tower.
[0034] Specifically, the foundation pit and backfill area 1, such as Figure 1 As shown, it is necessary to meet the engineering design and construction requirements, as well as relevant industry standards, and carry out slope protection design to meet the requirements of slope stability.
[0035] Specifically, the bottom cushion area of the foundation, such as Figure 2 As shown, a bottom seal concrete 2.1 having a strength grade not lower than C30 is used, and three or more flange-welded cylinder bases 2.2 are placed on the bottom seal concrete and tied and laid with at least one layer of steel bars.
[0036] Specifically, the main reinforced concrete area of the foundation, such as Figure 3 As shown, from the inside out, there are the steel cone 3.1 with the flange welded to the cylinder, various types of circumferential and radial steel bars 3.2 laid in the upper and lower layers, concrete 3.3 poured according to the steel bar arrangement, as well as the internal cable pre-buried pipe and drainage pipe 3.4, and foundation settlement observation point 3.5. The steel cone section is hoisted to the base flange in the bottom cushion area, and the cylinder is fixed by bolts. The upper and lower and inner and outer steel bars are arranged through the steel bar holes in the cylinder, and the formwork is set to pour concrete. At the same time, the cable pre-buried pipe and drainage pipe and settlement observation point are constructed. The relative position of the cylinder, the horizontality of the flange and the verticality of the cylinder are monitored during the construction process, and settlement observation monitoring and data recording are carried out.
[0037] Specifically, the laying and binding of the steel bars in the main area of the foundation are divided into lower steel bars 3.2.1 and upper steel bars 3.2.2. Layered steel bar laying construction can improve the safety of project construction.
[0038] Specifically, the bottom tower tube 4 of the supporting composite rigid tower frame to which the upper portion of the foundation belongs is connected to the top flange of the foundation through high-strength bolts.
[0039] Specifically, the number of the welded cylinder base 22 in the bottom cushion area 2, the steel cone section 3.1 in the main reinforced concrete area 3 and the corresponding tower bottom tower section 4 is N, where N is an integer and N≧3.
[0040] This utility model provides a new type of wind turbine support type composite rigid tower deep pit steel cylinder foundation and construction method, which is suitable for the engineering construction of this new type of foundation. The specific construction and installation steps are as follows:
[0041] The first step is to complete the excavation of deep foundation pit 1. The diameter and depth of the foundation pit must meet the corresponding design and construction standards. A multi-stage excavation method is adopted for deep foundation pits. Slope protection should be carried out during the excavation process to ensure construction safety.
[0042] The second step is to construct the foundation bottom cushion area by laying a certain thickness of bottom concrete 2.1 with a strength grade of not less than C30, and placing three or more flange-welded cylinder bases 2.2 on the bottom concrete;
[0043] Step 3: Fix the cylinder base on the cushion area with at least one layer of steel bars. At the same time, adjust the cylinder base to the corresponding position, measure the horizontality and flatness of the top flange of the cylinder base 2.2 and the position of the center point of each cylinder section. If the construction conditions are met, pour a concrete layer 2.1 with a strength grade of not less than C30.
[0044] Step 4: After the construction of the foundation bottom cushion area is completed, three or more foundation cylinder segments 3.1 are sequentially hoisted to the flange end faces of the cylinder body 2.2 in the cushion area. Ensure that the corresponding positions of the steel cylinder segments are accurate and connect and fix them through the flat end faces of the cylinder segment top flanges. Finally, use high-strength bolts to connect the top flange of the cushion area cylinder body and the bottom flange of the cylinder segment.
[0045] Step 5: According to the reinforcement layout design and construction requirements, penetrate and lay the internal and external axial, radial, and circumferential reinforcement 3.2 of each foundation cylinder segment. Lay and tie the lower reinforcement 3.2.1 and upper reinforcement 3.2.2 in steps. After placing and securing the internal and external formwork of each cylinder segment, pour concrete 3.3 with a strength grade of not less than C60 for the main reinforced concrete area.
[0046] Step 6: During the construction of the main reinforced concrete area, reserve and install cable pre-buried pipes and drainage pipes (3.4). Place one foundation settlement observation point in the center of the main reinforced concrete area, and at least six settlement observation points at equal angles (3.5) on the outer concrete platform. Install temperature sensors, etc., based on operational monitoring requirements.
[0047] Step 7: After the main reinforced concrete area is poured and hardened, the excavated foundation pit is backfilled with soil 1. During this period, the settlement of the main concrete is monitored and recorded according to the construction requirements. On this basis, the supporting composite tower 4 is hoisted and the equipment is installed.
[0048] The utility model provides a new type of wind turbine supporting composite rigid tower deep pit steel cylinder foundation and construction method, which specifically includes the excavation and slope protection of the foundation deep pit 1, the installation of the base cylinder section and concrete pouring of the bottom cushion area 2, the installation of the steel cone in the main reinforced concrete area 3, the laying and binding of steel bars, the pouring of concrete, the construction of cable pre-buried pipes and drainage pipes, the setting of settlement observation points, etc., and the installation of the tower cylinder 4 at the bottom of the tower. The design of this type of foundation makes full use of the recycled tower frames of dismantled units for the base of the cushion area, the main steel-concrete area sections and the bottom tower of the tower, which can meet the application requirements of the corresponding support-type composite tower and has a wide range of applicability. In addition, the structure has high rigidity, overall burial depth and good stability, which reduces the use of reinforced concrete. The installation process of the steel conical tower is mature, which significantly reduces the construction period of the project. The combination of steel conical sections is flexible and convenient. Not only can new tower sections be used, but also local materials can be used for the renovation projects of old wind farms, and tower sections and flanges can be reused, which greatly reduces the comprehensive costs of design, manufacturing, transportation and installation.
[0049] Finally, it should be noted that the above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A new type of deep pit steel cylinder foundation for a wind turbine supporting composite tower, characterized by: The invention comprises the foundation development and backfilling of the steel cylinder foundation (1), the bottom cushion area (2), the main reinforced concrete area (3), and three or more bottom tower sections of the supporting composite tower with the same specifications (4) connected to the steel cylinder foundation. The foundation construction comprises the excavation of the deep pit foundation and slope protection, the installation and concrete pouring of the base cylinder section of the bottom cushion area, the installation of the cylinder section of the main reinforced concrete area, the laying and binding of steel bars, the pouring of concrete, the construction of the cable pre-buried pipe and drainage pipe, the setting of the settlement observation point and the installation of the tower tube at the bottom of the tower.
2. The deep pit steel barrel foundation according to claim 1, characterized in that: The bottom cushion area (2) is paved with bottom sealing concrete (2.1) of strength grade not less than C30, and the welded cylinder base (2.2) is placed on the bottom sealing concrete (2.1) and tied and paved with not less than one layer of steel bars.
3. The deep pit steel barrel foundation according to claim 2, characterized in that: The main reinforced concrete area (3) comprises, from the inside out, a steel cone section (3.1) in which a flange is welded to the cylinder body, various types of axial, circumferential and radial reinforcements (3.2) laid in two layers, concrete poured according to the reinforcement arrangement (3.3), and internal pre-buried cable pipes and drainage pipes (3.4), and foundation settlement observation points (3.5).
4. The deep pit steel barrel foundation according to claim 3, characterized in that: The steel conical cylinder section (3.1) is hoisted so that the bottom flange is attached to the welded cylinder base (2.2) of the bottom cushion area (2), the cylinder of the steel conical cylinder section (3.1) is fixed by bolt connection, various types of axial, circumferential and radial steel bars (3.2) are arranged in the steel bar holes penetrating the cylinder, and a formwork is set to cast concrete (3.3), and the concrete (3.3) has a strength grade not lower than C60.
5. The deep pit steel barrel foundation according to claim 4, characterized in that: The various types of axial, circumferential and radial steel bars (3.2) are divided into lower steel bars (3.2.1) and upper steel bars (3.2.2), and the lower steel bars (3.2.1) and upper steel bars (3.2.2) are laid in layers to improve engineering construction safety.
6. The deep pit steel barrel foundation according to claim 1, characterized in that: The tower section (4) at the bottom of the tower is connected to the flange at the top of the foundation via high-strength bolts.
7. The deep pit steel barrel foundation according to claim 3, characterized in that: The number of the welded cylinder base (2.2) of the bottom cushion area (2), the steel cone section (3.1) of the main reinforced concrete area (3), and the corresponding tower bottom tower section (4) is N, where N is an integer and N≧3.