CN216552051U

CN216552051U - Column-barrel combined bearing type fan foundation

Info

Publication number: CN216552051U
Application number: CN202122861888.6U
Authority: CN
Inventors: 石继兵; 常显勇; 李辉; 龚节福; 甘立胜; 漆桧; 李锐; 谢信江; 黄强; 梅攀; 杨松; 杨龙城; 古兴宇
Original assignee: Sichuan Electric Power Design and Consulting Co Ltd
Current assignee: Sichuan Electric Power Design and Consulting Co Ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-05-17
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a column-cylinder combined bearing type fan foundation, belongs to the field of wind power generation, and aims to improve adaptability. The bearing platform comprises a bearing platform, wherein the bottom of the bearing platform is provided with bearing piles, and the bearing piles are cylindrical and are arranged into a circle along the edge of the bottom of the bearing platform; according to the height difference of the slope at the installation position, the bearing pile is divided into a high bearing section for being installed at a high position, a low bearing section for being installed at a low position and transition bearing sections on two sides along the annular direction of the bearing pile; the bottom surfaces of the low bearing section, the transition bearing section and the high bearing section are sequentially arranged in a step-shaped manner and gradually rise; the hollow area of bearing pile is provided with the support column of N vertical settings, and N support column use the vertical central axis of bearing pile as central evenly distributed, the top and the cushion cap fixed connection of support column. According to the utility model, through the arrangement of the bearing piles and the supporting columns, the earth excavation amount is reduced, the span, the thickness and the reinforcing bars of the bearing platform are all reduced, the requirement of cracks at the bottom of the bearing platform is easily met, and the consumption of concrete is saved.

Description

Column-barrel combined bearing type fan foundation

Technical Field

The utility model belongs to the field of wind power generation, and particularly relates to a column-cylinder combined bearing type fan foundation.

Background

Wind power generation is rapidly developing and fans are gradually installed on steep terrains with large gradients. The fan foundation is used as an important component part for installing the fan, and the establishment of the position of the fan is directly influenced. The existing fan foundations mainly include an enlarged plate foundation, a beam-plate foundation, a rock anchor rod foundation and the like, wherein the beam-plate foundation and the enlarged plate foundation are widely adopted due to the fact that the beam-plate foundation and the enlarged plate foundation are suitable for all fields on land. If be applied to the great steep terrain area of slope with traditional beam slab formula basis and expansion plate formula basis, fan position department can not avoid causing to dig greatly and fill out greatly, and excavation earth volume is big, the excavation back side slope administers the degree of difficulty big and the expense is high, and fan foundation stability is difficult to guarantee, and the construction degree of difficulty is big, is unfavorable for environmental protection and soil and water conservation, directly influences the establishment of fan position.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a column-cylinder combined bearing type fan foundation which can reduce the soil and stone excavation and filling amount of a fan field in steep terrain with a large gradient and save the concrete volume.

The technical scheme adopted by the utility model is as follows: the column-cylinder combined bearing type fan foundation comprises a bearing platform at the upper part, wherein the bottom of the bearing platform is provided with bearing piles, and the bearing piles are cylindrical and are arranged into a circle along the edge of the bottom of the bearing platform; according to the height difference of the slope at the installation position of the bearing pile, the bearing pile is divided into a high bearing section for being installed at a high position, a low bearing section for being installed at a low position and transition bearing sections on two sides along the annular direction of the bearing pile; the bottom surfaces of the low bearing section, the transition bearing section and the high bearing section are sequentially arranged in a step-shaped manner and gradually rise; the hollow area of bearing pile is provided with the support column of N vertical settings, N the support column uses the vertical central axis of bearing pile as central evenly distributed, the top and the cushion cap fixed connection of support column, the vertical downwardly extending in bottom.

Furthermore, the bottom end of the supporting column is fixedly connected with a column foundation.

Furthermore, one support column is provided with one column foundation, and the column foundations are mutually independent.

Furthermore, the transition bearing sections are formed by M sections of transition units along the annular direction, and the bottom surfaces of the M sections of transition units are sequentially arranged in a step-shaped manner and gradually rise from one side adjacent to the low bearing section to one side adjacent to the high bearing section.

Further, a high bearing foundation is arranged at the bottom end of the high bearing section; the bottom end of the low bearing segment is provided with a low bearing foundation; the bottom end of each transition unit of the transition bearing section is provided with a transition bearing foundation; the high bearing foundation, the low bearing foundation and the transition bearing foundation are equal in thickness and arc-shaped; the projections of the high bearing foundation, the low bearing foundation and the transitional bearing foundation in the horizontal plane along the vertical direction form a ring.

Furthermore, the cross section of cushion cap is circular, and along the vertical cone portion that includes the top and the column portion that links up with the cone portion of bottom and, the cone portion is the round platform shape that enlarges gradually from top to bottom, the column portion is cylindrically.

The utility model has the beneficial effects that: according to the utility model, the cylindrical bearing pile is arranged at the bottom of the bearing platform, and the support columns are arranged in the bearing pile, so that a hollow area which does not need to be excavated is formed among the bottom surface of the bearing platform, the bearing pile, the ground and the support columns, and the excavated volume of earth is reduced;

the bearing pile is divided into a high bearing section for being mounted at a high position, a low bearing section for being mounted at a low position and transition bearing sections on two sides along the annular direction; the bottom surfaces of the low bearing section, the transition bearing section and the high bearing section are sequentially arranged in a step-like manner and gradually rise, so that the bottom surface elevations of the low bearing section, the transition bearing section and the high bearing section are adaptive to the gradient change of a sloping field, the earth excavation amount is further reduced, meanwhile, the disturbance of the excavation, concrete pouring and other operations on the sloping field is reduced, and the stability of the foundation of the fan foundation is favorably improved;

through set up the support column in the hollow region of bearing pile, make most vertical load and the transmission of the fractional horizontal load of wind turbine generator system upper portion load via the support column downwards, the burden of bearing pile has been alleviateed, make this column casing unite bearing formula fan basis satisfying fan foundation bearing capacity requirement, fan foundation stability requirement and fan foundation subside on the basis of deformation requirement, it is vacant completely in the region to surround than the bearing pile, it compares not to set up bearing structure, the cushion cap span reduces, cushion cap thickness reduces, the cushion cap arrangement of reinforcement is less, cushion cap bottom crack requires to satisfy easily.

Drawings

FIG. 1 is a schematic view of the external structure of the present invention;

FIG. 2 is a schematic structural view of a transition load-bearing segment of the present invention on the lift side;

fig. 3 is a sectional view a-a of fig. 1.

In the figure, a bearing platform 1, a conical part 1A, a column part 1B, a bearing pile 2, a high bearing section 2A, a transition bearing section 2B, a transition unit 2B1, a low bearing section 2C, a high bearing foundation 3A, a transition bearing foundation 3B, a low bearing foundation 3C, a support column 4, a column foundation 4A and a column platform 5.

Detailed Description

The utility model is further described below with reference to the following figures and examples:

the present invention is directed to "up," "down," "bottom," "top," "upper," and "lower" orientations relative to the orientation shown in FIG. 1.

The column-cylinder combined bearing type fan foundation comprises a bearing platform 1 at the upper part, wherein bearing piles 2 are arranged at the bottom of the bearing platform 1, and the bearing piles 2 are arranged into a circle along the edge of the bottom of the bearing platform 1; according to the height difference of the slope at the installation position, the bearing pile 2 is divided into a high bearing section 2A installed at a high position, a low bearing section 2C installed at a low position and transition bearing sections 2B on two sides along the annular direction; the bottom surfaces of the low bearing segment 2C, the transition bearing segment 2B and the high bearing segment 2A are sequentially arranged in a step-shaped manner and gradually rise; be provided with the support column 4 of the vertical setting of N in the hollow region of bearing pile 2, N support column 4 uses the vertical central axis of bearing pile 2 as central evenly distributed, the top and the cushion cap 1 fixed connection of support column 4, the vertical downwardly extending in bottom.

The column-cylinder combined bearing type fan foundation disclosed by the utility model is similar to a traditional fan foundation, a fan tower cylinder foundation ring or a prestressed anchor bolt is pre-embedded in a bearing platform 1, and a column platform 5 connected with the bottom of a fan tower cylinder is arranged at the center of the top of the bearing platform 1. Traditional fan foundation only adopts cushion cap 1 to pour in ground bearing layer as fan foundation, and its earthwork excavation volume is great, increases at steep side slope construction degree of difficulty.

The utility model discloses a column-cylinder combined bearing type fan foundation.A bearing pile 2 is arranged at the bottom of a bearing platform 1, the bearing pile 2 is cylindrical and comprises a high bearing section 2A, a low bearing section 2C and a transition bearing section 2B, wherein the high bearing section 2A is arranged at the high position of a slope, and the low bearing section 2C is arranged at the low position of the slope. The bottom surfaces of the low bearing section 2C, the transition bearing section 2B and the high bearing section 2A are sequentially arranged in a step-like manner gradually rising, so that the bottom end of the bearing pile 2 can be adapted to the terrain gradient change, the bottom surface position of the bearing pile 2 is determined according to the position of each side slope bearing layer, each part of the bottom surface of the bearing pile 2 can adapt to the depth of the bearing layer while acting on the side slope bearing layer, the disturbance of the excavation, concrete pouring and other operations on the side slope is reduced, the stability of the foundation of the fan is improved, because the bottom surfaces of the low bearing section 2C, the transition bearing section 2B and the high bearing section 2A are sequentially arranged in a step-like manner gradually rising, pile holes for pouring the low bearing section 2C, the transition bearing section 2B and the high bearing section 2A are also distributed in a step-like manner, when the pile holes are excavated, the corresponding pile holes are not required to be excavated to be flush with the bearing layer at the lowest position, thereby reducing the amount of earth excavation.

If the area surrounded by the bearing pile 2 of the column-cylinder combined bearing type fan foundation disclosed by the utility model is completely empty, the upper load of the wind turbine generator, including the vertical load, the horizontal load and the tipping bending moment, is transmitted to the bearing platform 1 through the fan tower cylinder and then is transmitted to the bearing pile 2 from the bearing platform 1. Because the middle part of the bearing pile 2 has no supporting structure and the middle span of the bearing platform 1 is large, the middle bending moment of the bearing platform 1 is large, the bottom crack of the bearing platform 1 is difficult to control, and the reinforcing bars of the bearing platform 1 are correspondingly large, so that the steel content of the whole column-tube combined bearing type fan foundation is large, the construction difficulty is large, and the economical efficiency is poor.

The above problems can be effectively solved by arranging the support columns 4 in the hollow area of the load-bearing pile 2, and the details are as follows: n supporting columns 4 which are vertically arranged are arranged in the hollow area of the bearing pile 2, so that the supporting columns 4 play a role of supporting the bearing platform 1, the upper load of the wind turbine generator comprises a vertical load, a horizontal load and a tipping bending moment, the upper load is transmitted to a cylindrical platform 5 at the top of the bearing platform 1 through a fan tower cylinder and is transmitted to the inside of the bearing platform 1 through the cylindrical platform 5, after internal force redistribution inside the bearing platform 1, most of the vertical load is transmitted to the middle supporting column 4 from the bearing platform 1 and then is transmitted downwards, and a small part of the vertical load is transmitted to the bearing pile 2 from the bearing platform 1 and then is transmitted downwards through the bearing pile 2; most of the horizontal load is transferred from the bearing platform 1 to the bearing pile 2 to form a bearing pile bending moment, and then is transferred downwards by the bearing pile, and a small part of the horizontal load is transferred from the bearing platform 1 to the middle support column 4 and then is transferred downwards; the overturning bending moment of the fan is mainly transmitted to the bearing pile 2 from the bearing platform 1 to form the bending moment of the bearing pile, and then is transmitted downwards from the bearing pile 2. This structure is on satisfying fan foundation bearing capacity requirement, fan foundation stability requirement and fan foundation settlement deformation requirement's basis, and than complete vacant in the bearing pile 2 surrounds the region, does not set up bearing structure and compares, and cushion cap 1 span reduces, cushion cap 1 thickness reduces, cushion cap 1 arrangement of reinforcement is less, cushion cap 1 bottom crack satisfies easily, and the while steel content is saved about 20%, and concrete square volume is saved about 15%, has practiced thrift the civil engineering cost greatly, and project economy is better.

The number N of the support columns 4 is more than or equal to 1, and when N is 1, as shown in fig. 2 or 3, the support columns 4 are arranged in the center of the area surrounded by the load-bearing pile 2. When N is more than 1, all the support columns 4 are uniformly distributed on the circumference which takes the center of the area surrounded by the load-bearing pile 2 as the center of a circle.

In order to improve the bearing capacity of the supporting column 4, a column foundation 4A is fixedly connected to the bottom end of the supporting column 4. The column foundation 4A is a reinforced concrete foundation and is poured on a bearing layer of the side slope foundation. So that the load transmitted to the support column 4 is transmitted downward to the column base 4A.

One column base 4A may be shared by all the support columns 4, and thus, when the number of the support columns 4 is greater than 1, the area of the column base 4A is large, thereby increasing the earth excavation volume, and in order to avoid this problem, it is preferable that one support column 4 is provided with one column base 4A, and the column bases 4A are independent from each other. In this structure, the area of the top surface of the column base 4A is larger than the area of the cross section of each support column 4. The independent column foundations 4A refer to a structure that when the number of the support columns 4 is larger than 1, the column foundations 4A are not cast together at the same time, but are separated independently, and are not connected into a whole. So, make each support column 4 excavation degree of depth play the foundation of corresponding position hold the layer can, adaptation side slope that can be better changes to more do benefit to and reduce the excavation earthwork volume.

The installation position of the side slope corresponding to the transition bearing section 2B has a slope, the depth of the supporting layer is in a changing state, if the transition bearing section 2B can be an integral structure, and the deepest position of the supporting layer is used as a reference in the earth excavation process. In order to adapt to the change of the depth of the bearing stratum and reduce the earth volume, optimally, the transition bearing section 2B is formed by M sections of transition units 2B1 along the annular direction, and the bottom surfaces of the M sections of transition units 2B1 are sequentially arranged in a step-shaped manner, wherein the step-shaped manner gradually rises from one side adjacent to the lower bearing section 2C to one side adjacent to the higher bearing section 2A. Wherein M is a positive integer greater than or equal to 1.

In order to improve the bearing capacity of the bearing pile 2, a high bearing foundation 3A is arranged at the bottom end of the high bearing section 2A; the bottom end of the low bearing segment 2C is provided with a low bearing foundation 3C; the bottom end of each transition unit 2B1 of the transition bearing segment 2B is provided with a transition bearing foundation 3B; the high bearing foundation 3A, the low bearing foundation 3C and the transition bearing foundation 3B are equal in thickness and arc-shaped; the projections of the high bearing foundation 3A, the low bearing foundation 3C and the transition bearing foundation 3B along the vertical direction on the horizontal plane form a ring.

The embodiment shown in fig. 3 of the present specification is the case where the high load-bearing foundation 3A, the low load-bearing foundation 3C and the transitional load-bearing foundation 3B have the same curvature, and the high load-bearing section 2A, the low load-bearing section 2C and the transitional unit 2B1 have the same curvature. However, in the present invention, the arc lengths of the high load bearing segment 2A, the low load bearing segment 2C and each transition unit 2B1 are determined according to the actual condition of the slope, and the arc lengths may be all the same, partially the same or completely different.

The bearing platform 1 can be cylindrical, in the utility model, the cross section of the bearing platform 1 is circular, the bearing platform vertically comprises a conical part 1A at the top and a cylindrical part 1B at the bottom, the cylindrical part is connected with the conical part 1A, the conical part 1A is in a circular truncated cone shape which is gradually enlarged from top to bottom, and the cylindrical part 1B is cylindrical. The conical part 1A is arranged, so that the top surface of the bearing platform 1 is an inclined surface which gradually inclines downwards from the middle part to the outer periphery, and drainage is facilitated.

Claims

1. Column casing joint bearing formula fan basis, including cushion cap (1) on upper portion, its characterized in that: the bottom of the bearing platform (1) is provided with bearing piles (2), and the bearing piles (2) are cylindrical and are arranged into a circle along the edge of the bottom of the bearing platform (1); according to the height difference of the slope at the installation position, the bearing pile (2) is divided into a high bearing section (2A) for being installed at a high position, a low bearing section (2C) for being installed at a low position and transition bearing sections (2B) at two sides along the annular direction; the bottom surfaces of the low bearing section (2C), the transition bearing section (2B) and the high bearing section (2A) are sequentially arranged in a step-like manner and gradually rise; be provided with support column (4) of the vertical setting of N in the hollow area of bearing pile (2), N support column (4) use the vertical central axis of bearing pile (2) as central evenly distributed, the top and cushion cap (1) fixed connection of support column (4), the vertical downwardly extending in bottom.

2. The column-cylinder combined load-bearing fan foundation of claim 1, wherein: the bottom end of the supporting column (4) is fixedly connected with a column foundation (4A).

3. The column-cylinder combined load-bearing fan foundation of claim 2, wherein: one support column (4) is provided with one column foundation (4A), and the column foundations (4A) are independent of each other.

4. The column-cylinder combined load-bearing fan foundation of claim 1, 2 or 3, wherein: the transition bearing section (2B) is formed by M sections of transition units (2B1) along the circumferential direction, and the bottom surfaces of the M sections of transition units (2B1) are sequentially arranged in a step-shaped manner, wherein the step-shaped manner gradually rises from one side adjacent to the lower bearing section (2C) to one side adjacent to the higher bearing section (2A).

5. The column-cylinder combined load-bearing fan foundation of claim 4, wherein: a high bearing foundation (3A) is arranged at the bottom end of the high bearing segment (2A); the bottom end of the low bearing segment (2C) is provided with a low bearing foundation (3C); the bottom end of each transition unit (2B1) of the transition bearing section (2B) is provided with a transition bearing foundation (3B); the high bearing foundation (3A), the low bearing foundation (3C) and the transition bearing foundation (3B) are equal in thickness and arc-shaped; the projections of the high bearing foundation (3A), the low bearing foundation (3C) and the transition bearing foundation (3B) in the horizontal plane along the vertical direction form a ring.

6. The column-cylinder combined load-bearing type fan foundation of claim 1 or 2, wherein: the cross section of cushion cap (1) is circular, along vertical cone portion (1A) including the top and column portion (1B) that links up with cone portion (1A) of bottom and, cone portion (1A) is the round platform shape that enlarges from top to bottom gradually, column portion (1B) is cylindrical.