CN-117328485-B - Capacity-expanding method of wind power assembled multi-foot foundation structure capable of expanding capacity

CN117328485BCN 117328485 BCN117328485 BCN 117328485BCN-117328485-B

Abstract

The invention relates to a wind power assembled multi-foot foundation structure capable of expanding capacity and an expanding method thereof, belonging to the technical field of wind power foundation structures, the structure is provided with two different forms before and after expanding capacity, the wind power foundation structure before expanding capacity comprises a table post, a plurality of precast rib beams with inner sides uniformly connected with the periphery of the table post and a plurality of precast bearing platforms fixedly connected with the outer sides of the precast rib beams, the foundation structure after expanding capacity comprises expansion rib beams inserted between adjacent precast rib beams, the end parts of the outer sides of the expansion rib beams are provided with the expansion bearing platforms, the expansion table column is vertically installed on the table column, the expansion anchor plate connected with the tower barrel is circumferentially arranged on the inner side of the expansion table column, the connecting anchor bolts are circumferentially arranged on the overhanging part of the expansion table column, the expansion rib beam, the expansion bearing platform and the expansion table column are prefabricated, the original wind power foundation structure is modified and assembled, the original wind power foundation structure is not required to be dismantled, expansion becomes simple and convenient, the expansion table column is an assembled structure, the construction period is short, the disassembly and the assembly are convenient, and the construction quality can be effectively guaranteed.

Inventors

BAI JIULIN
WANG RUIYI
WANG YUHANG
YANG QINGSHAN

Assignees

重庆大学

Dates

Publication Date: 20260505
Application Date: 20231019

Claims (7)

1. A capacity expansion method of a wind power assembled type multi-foot foundation structure capable of expanding capacity is characterized by comprising two different structural forms before and after capacity expansion, wherein the wind power foundation structure before capacity expansion comprises a table column, a plurality of precast rib beams with inner sides uniformly connected with the periphery of the table column and a plurality of precast caps fixedly connected with the outer sides of the precast rib beams, the foundation structure after capacity expansion comprises expansion rib beams inserted between adjacent precast rib beams, the end parts of the outer sides of the expansion rib beams are provided with expansion caps, the table column is vertically provided with expansion table columns, the inner sides of the expansion table columns are circumferentially provided with expansion anchor plates connected with tower cylinders, the overhanging parts of the expansion table columns are circumferentially provided with connecting anchor bolts, the joint parts between the adjacent precast rib beams and the expansion rib beams are precast with embedded U-shaped ribs which are mutually overlapped, and the joint parts of the precast rib beams and the adjacent expansion rib beams after the joint parts form post-pouring joint joints, and the capacity expansion method comprises the following steps: the method comprises the steps of S1, chiseling an original wind power foundation column and an original post-pouring joint, splitting an original wind power foundation, namely splitting an original prefabricated rib beam, placing a new expansion rib beam between adjacent prefabricated rib beams, and pouring a new joint between the original prefabricated rib beam and the expansion rib beam, wherein pre-buried U-shaped ribs between the prefabricated rib beam and the expansion rib beam are mutually overlapped, and the connection strength of the prefabricated rib beam and the expansion rib beam is improved; S2, the outer end of the expansion rib beam is lapped with a new expansion bearing platform, the diameter of a circle formed by the expansion bearing platform is far larger than that of a circle formed by the prefabricated bearing platform, so that the embedded depth of the new wind power foundation is relatively large, the weight of the covering soil can be fully utilized to enable the expansion rib beam to be tightly attached to the expansion bearing platform at the end part, the connection of the end part can be omitted, and the construction steps are reduced; s3, prefabricating a capacity expansion table column according to the diameter requirement of the new wind power tower barrel, installing the capacity expansion table column on the prefabricated rib beam and the capacity expansion rib beam, installing a capacity expansion anchor plate in a circular groove at the inner side of the capacity expansion table column, inserting a proper connecting anchor bolt into an anchor bolt hole at the circumference of the capacity expansion table column to realize the connection of the capacity expansion table column and the corresponding prefabricated rib beam and the capacity expansion rib beam, and inserting a proper connecting anchor bolt into the anchor bolt hole of the capacity expansion anchor plate to realize the connection of the capacity expansion table column and the new wind power tower barrel; s4, backfilling the central cavity of the dilatation column after installing the new wind power tower.
2. The capacity expansion method as claimed in claim 1, wherein the overhanging portion of the capacity expansion table column is circumferentially provided with anchor holes adapted to the connecting anchors.
3. The capacity expansion method as claimed in claim 1, wherein the inner side of the capacity expansion table column is circumferentially provided with a groove adapted to the capacity expansion anchor plate.
4. The capacity expansion method as claimed in claim 1, wherein the capacity expansion rib beam includes a deck connection part II connected with the capacity expansion deck and having a right angle trapezoidal shape, and a column connection part II having a hexagonal column shape with a connection end of the capacity expansion post.
5. The capacity expansion method as claimed in claim 4, wherein the bearing platform connecting part II is arranged in lap joint with the capacity expansion bearing platform.
6. The capacity expansion method as claimed in claim 4, wherein the prefabricated rib beam includes a deck connection part I connected to the prefabricated deck and having a right angle trapezoidal shape and a column connection part I having a hexagonal column shape connected to the column connection end surface.
7. The capacity expansion method as claimed in claim 6, wherein the capacity expansion column is vertically installed at the column connection part I and the column connection part II.

Description

Capacity-expanding method of wind power assembled multi-foot foundation structure capable of expanding capacity Technical Field The invention belongs to the technical field of wind power foundation structures, and particularly relates to a wind power assembled multi-foot foundation structure capable of expanding capacity and a capacity expanding method thereof. Background Wind energy is inexhaustible renewable clean energy, wind power generation is one of the most potential sustainable projects in the world, and the sustainable development of wind power generation is ensured, and a fan foundation for installing a fixed fan tower is key. However, the land resources are limited, the construction of wind farms on land faces the problems of lack of land resources, complex geological conditions and the like, and with the continuous development of wind turbine technologies, the installed capacity of wind turbines constructed earlier is relatively low, the economic benefit is limited, most of early wind farms have better wind energy resources, and the prior wind farms are completely abandoned as a great resource waste. The low-capacity old wind power plant is updated or expanded, resources can be effectively utilized, the service life of the wind power plant is generally 20-25 years, and the service life of the foundation is generally 50 years, so that the problem of expanding the capacity of the land wind power plant foundation in the service life is common in recent years, and even in the future development stage of wind power. At present, when the capacity of a wind driven generator is expanded, the diameter of a wind driven generator tower cylinder is often required to be expanded, after the diameter of the wind driven generator tower cylinder is expanded, the existing land wind power foundation cannot be conveniently and reliably connected with the tower cylinder, the original foundation is usually required to be removed, re-built or the original foundation structure is chiseled off for some expansion and reinforcement, the construction is complex, the construction period is long, the original foundation is damaged greatly, the original foundation cannot be fully utilized, and the construction quality cannot be effectively ensured. Disclosure of Invention In view of the above, the invention provides an assembled multi-legged wind power foundation structure capable of expanding capacity and an expanding method thereof, which aim to solve the problems that the prior art has large expanding difficulty when expanding capacity of a wind power motor, the original foundation cannot be fully utilized, the expanding construction period is long, and the construction quality cannot be ensured. In order to achieve the above purpose, the present invention provides the following technical solutions: The wind power assembled multi-foot foundation structure capable of expanding comprises two different structural forms before and after expanding, wherein the wind power foundation structure before expanding comprises a table post, a plurality of prefabricated rib beams with inner sides uniformly connected with the periphery of the table post and a plurality of prefabricated bearing platforms fixedly connected with the outer sides of the prefabricated rib beams, the structure after expanding comprises expansion rib beams inserted between the adjacent prefabricated rib beams, the end parts of the outer sides of the expansion rib beams are provided with expansion bearing platforms, the table post is vertically provided with expansion table posts, expansion anchor plates connected with tower cylinders are circumferentially arranged on the inner sides of the expansion table posts, and connecting anchor bolts are circumferentially arranged on overhanging parts of the expansion table posts. The foundation scheme has the beneficial effects that the capacity expansion rib beam, the capacity expansion bearing platform and the capacity expansion table column are prefabricated in advance, and are directly assembled on the original wind power foundation site before capacity expansion, so that the original wind power foundation structure does not need to be removed and repaired in a complex manner, the capacity expansion is easy to realize, and the foundation scheme is of an assembled structure, short in construction period and convenient to assemble and disassemble, and can effectively guarantee the construction quality. Furthermore, the joints between the adjacent prefabricated rib beams and the expansion rib beams are prefabricated with mutually lapped embedded U-shaped ribs, and the lapped prefabricated rib beams and the adjacent expansion rib beams form post-pouring joints. The beneficial effects are that the capacity-expanding rib beam is stably connected with the prefabricated rib beam. Further, the overhanging part of the dilatation table column is circumferentially provided with anchor bolt holes matched with the connecting anchor