CN-121976560-A - Composite anchoring structure and anchoring method of wind power mixing tower

CN121976560ACN 121976560 ACN121976560 ACN 121976560ACN-121976560-A

Abstract

The invention discloses a composite anchoring structure and an anchoring method of a wind power mixing tower, wherein the lower part of the mixing tower body is a concrete tower section, the wind power mixing tower further comprises a concrete foundation buried below the ground surface and used for bearing the mixing tower body, an external prestress anchoring assembly comprises a prestress rope and an anchor seat, the upper end of the prestress rope is connected with the mixing tower body, the lower end of the prestress rope extends to the outer side of the concrete foundation and is anchored to the upper part of the outer side wall of the concrete foundation through the anchor seat, an anchoring point is higher than the ground surface, and an internal prestress anchor bolt assembly comprises a prestress anchor bolt, an upper anchor plate and a lower anchor plate, the upper anchor plate is embedded at the top of the concrete foundation and fixedly connected with the bottom of the concrete tower section, the lower anchor plate is embedded at the inner lower part of the concrete foundation, and the prestress anchor bolt penetrates through the concrete foundation and is fixedly connected with the upper anchor plate and the lower anchor plate at two ends of the prestress anchor bolt so as to apply prestress to the concrete foundation and anchor the concrete tower section on the concrete foundation. The invention aims to solve the problems of inconvenient construction, difficult maintenance and easy cracking and water seepage of the traditional anchoring structure.

Inventors

HAO HUAGENG
Liu Shanzhuo
LIU HAOLIN
SUN XIAODONG
Shen zhuang
Lv Yunbo
HAO XINTONG
LIU SHENGYUAN
LIU YUHUI
GAO JIANHUI

Assignees

华能安达市清洁能源有限公司
中国华能集团清洁能源技术研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20260320

Claims (10)

1. The utility model provides a wind-powered electricity generation mixes compound anchor structure of tower, includes the tower body that mixes, mix tower body lower part is concrete tower section of thick bamboo section (6), its characterized in that still includes: the concrete foundation (1) is buried below the ground surface and is used for bearing the mixing tower body; the external prestress anchoring assembly comprises a prestress cable (7) and an anchor seat, wherein the upper end of the prestress cable (7) is connected with the mixing tower body, the lower end of the prestress cable extends to the outer side of the concrete foundation (1) and is anchored at the upper part of the outer side wall of the concrete foundation (1) through the anchor seat, the anchoring point is higher than the ground surface, and The built-in prestressed anchor bolt assembly comprises a prestressed anchor bolt, an upper anchor plate (14) and a lower anchor plate (15), wherein the upper anchor plate (14) is pre-buried at the top of the concrete foundation (1) and fixedly connected with the bottom of the concrete tower section (6), the lower anchor plate (15) is pre-buried at the lower part of the interior of the concrete foundation (1), and the prestressed anchor bolt penetrates through the concrete foundation (1) and is respectively fixedly connected with the upper anchor plate (14) and the lower anchor plate (15) at two ends so as to apply prestress to the concrete foundation (1) and anchor the concrete tower section (6) on the concrete foundation (1).
2. The composite anchoring structure of the wind power mixing tower according to claim 1, wherein an annular bracket (5) is arranged on the outer side of the top of the concrete foundation (1), and a duct for the prestressed cable (7) to pass through is arranged on the annular bracket (5).
3. A composite anchoring structure of a wind power mixing tower according to claim 2, characterized in that concrete rib plates (9) are arranged below the annular brackets (5) and at gaps between adjacent anchoring ends of the prestressed cables (7).
4. A composite anchoring structure of a wind power mixing tower according to claim 3, characterized in that the lower surface of the annular bracket (5) is provided with a drip groove (4) near the outer side edge.
5. A composite anchoring structure of a wind power mixing tower according to claim 3, characterized in that water blocking strips (8) are arranged on the upper part and the lower part of the outer side of the concrete rib plate (9), a surrounding block (3) is wrapped on the outer side of the concrete rib plate (9), and the surrounding block (3) and the water blocking strips (8) are firmly adhered to form a closed space between the concrete rib plates (9).
6. The composite anchoring structure of a wind power mixing tower according to claim 5, wherein a desiccant is placed in the enclosed space formed by the enclosure (3).
7. The composite anchoring structure of a wind power mixing tower according to claim 1, wherein the built-in pre-stress anchor bolt assembly further comprises a spacer sleeve sleeved outside the pre-stress anchor bolt, and the spacer sleeve isolates the pre-stress anchor bolt from the main body of the concrete foundation (1).
8. The composite anchoring structure of the wind power mixing tower according to claim 1, wherein a foot placing structure is arranged at the bottom of the concrete tower section (6), and a prestress pore canal for accommodating the prestress rope (7) is arranged inside the foot placing structure.
9. The composite anchoring structure of the wind power mixing tower according to claim 1, wherein the prestressed cables (7) in the external prestressed anchor assembly and the prestressed anchors in the internal prestressed anchor assembly are arranged in a crossed manner in the height direction.
10. A composite anchoring method of a wind power mixing tower, which is applied to the composite anchoring structure of claim 1, and is characterized by comprising the following steps: pouring a concrete foundation (1), embedding a built-in pre-stress anchor bolt assembly in the pouring process, exposing an upper anchor plate (14) at the top of the concrete foundation (1), and enabling a pre-stress anchor bolt to penetrate through the concrete foundation (1) and enabling the lower end of the pre-stress anchor bolt to be fixedly connected with a lower anchor plate (15); Casting or installing a concrete tower section (6) on the concrete foundation (1) in a segmented manner, and fixedly connecting the bottom of the concrete tower section (6) with the upper anchor plate (14); installing an upper anchoring point of an external prestress anchoring assembly on the top or a steel tower section above the concrete tower section (6), and enabling a prestress cable (7) to pass through a pore canal inside the concrete tower section (6) so that the lower end of the prestress cable extends to the outer side of the concrete foundation (1); an anchor seat is arranged on the upper portion of the outer side wall of the concrete foundation (1), the lower end of the prestressed cable (7) is tensioned and anchored through the anchor seat, and an anchoring point is higher than the ground surface.

Description

Composite anchoring structure and anchoring method of wind power mixing tower Technical Field The invention belongs to the technical field of wind power mixing tower foundation anchoring, and particularly relates to a composite anchoring structure and an anchoring method of a wind power mixing tower. Background The wind power mixing tower (steel-concrete mixing tower barrel) has the rigidity advantage of a concrete structure and the light weight characteristic of a steel structure, and becomes one of main structural forms of the ultra-high wind power tower. The wind power mixing tower is required to bear multiple complex loads such as dead weight, fan load, wind load, inertia force and the like in the operation process, and extremely high requirements are provided for bearing stability, construction convenience and durability of a foundation anchoring system. The existing wind power mixing tower foundation anchoring technology mainly adopts the following two modes: One way is that the lower end of the prestressed cable is internally provided with an anchoring structure, namely, the lower end of the prestressed cable is anchored in a cavity or a reserved pore canal arranged in the foundation. This structure requires a special cavity or a deeply buried duct to be provided in the concrete foundation, resulting in a complicated shape and an increased volume of the foundation. Because the cavity inner space is narrow, personnel and equipment operation are limited during prestress tensioning construction, and construction efficiency and construction quality are seriously affected. Meanwhile, the closed cavity environment brings great inconvenience to the later maintenance, and the cavity part is easy to crack due to stress concentration, so that water seepage and water leakage are easy to occur at the crack part, and the durability of the foundation is influenced. The other mode is that the joint of the foundation and the tower barrel is connected by adopting a common anchor bolt, namely, the concrete tower barrel section is fixed with the foundation by the common anchor bolt pre-embedded at the top of the foundation. The connecting mode is simple in structure, but the common anchor bolts are difficult to apply prestress to the whole foundation, when the foundation bears a large bending moment load, the connection part of the top of the foundation and the bottom of the tower is easy to generate tensile stress concentration, and the connection looseness or the fatigue damage of concrete is easy to cause under the action of long-term cyclic load. In recent years, attempts have been made to anchor the lower end of the prestressed cable to the outside of the foundation, but the existing external anchoring structure is generally used only as a separate anchoring means, and the synergistic effect with the internal prestressing system of the foundation is not considered. Although simple external anchoring is convenient for construction and maintenance, the foundation is still of a common reinforced concrete structure, the tensile capacity of the joint of the top of the foundation and the tower is limited, and the compressive property of the concrete material and the structural advantage of the prestress system are difficult to fully develop. Disclosure of Invention Aiming at the problems existing in the prior art, the invention provides a composite anchoring structure and an anchoring method of a wind power mixing tower, and aims to solve the problems that in the existing wind power mixing tower foundation anchoring technology, a built-in anchoring structure at the lower end of a prestressed cable causes complex foundation body, limited construction, inconvenient maintenance, easiness in cracking and water seepage to influence durability, common anchor bolt connection is easy to generate tensile stress concentration, loosening of connection or fatigue damage of concrete, an external anchoring structure does not cooperate with a foundation internal prestress system, and the tensile capacity of the joint of the top of the foundation and a tower barrel is limited, so that the material and structural advantages are difficult to fully develop, and the bearing stability, construction convenience and durability of the foundation anchoring system are improved. In order to solve the technical problems, the invention is realized by the following technical scheme: according to a first aspect of the present invention, there is provided a composite anchoring structure of a wind power mixing tower, including a mixing tower body, wherein the lower part of the mixing tower body is a concrete tower section, and further including: The concrete foundation is buried below the ground surface and is used for bearing the mixing tower body; The external prestress anchoring assembly comprises a prestress rope and an anchor seat, wherein the upper end of the prestress rope is connected with the mixing tower body, the lower end of the prestress r