Iron tower pile foundation for deep miscellaneous fill foundation
By using array-set sub-micro piles and/or partition wall support bearings in deep-filled soil foundations, the problems of difficult construction, high cost and insufficient bearing capacity in the prior art are solved, and tower pile foundations with convenient construction, low cost and strong load resistance are realized.
Patent Information
- Application Number
- CN202422233682.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-12
AI Technical Summary
When building tower pile foundations, the existing technology has problems such as construction difficulties, high costs and insufficient bearing capacity.
The sub-micro piles and/or partition walls arranged in an array are used to support the bearing, shorten the pile foundation length, reduce foundation processing requirements, and improve load-bearing capacity.
It realizes a deep-layer miscellaneous land-fill tower pile foundation with convenient construction, low cost and strong load resistance, and avoids pressure bending deformation of the pile body.
Smart Images
Figure CN222975926U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power transmission and transformation engineering equipment, and more specifically, to a tower pile foundation for deep miscellaneous filled soil foundation. Background Art
[0002] Due to diverse components, uneven particles, complex structure and great treatment difficulty, the building miscellaneous filled soil foundation has disadvantages such as poor uniformity, low bearing capacity and easy settlement.
[0003] For deep miscellaneous filled soil foundations with a depth greater than 45m, if a shallow foundation scheme is adopted, a large amount of foundation treatment work is required to ensure the bearing capacity of the miscellaneous filled soil foundation for the pile foundation; if a single pile foundation is adopted, the pile foundation needs to pass through the miscellaneous filled soil layer and connect with the bedrock, resulting in a relatively long pile foundation length, relatively difficult construction and high construction cost; if a micro pile foundation scheme is adopted, a pile foundation is jointly composed of micro piles with a pile foundation diameter of 200 - 400mm and a pile cap. Due to the small diameter of the micro piles, the stiffness of the micro piles is small, and it is difficult to bear the pile body buckling caused by the lack of lateral restraint in the miscellaneous filled soil foundation.
[0004] In summary, how to provide a tower pile foundation for deep miscellaneous filled soil foundation with convenient construction and low cost is an urgent problem to be solved by those skilled in the art at present. Content of the Utility Model
[0005] In view of this, the purpose of the utility model is to provide a tower pile foundation for deep miscellaneous filled soil foundation, which uses sub - micro piles and / or partition walls arranged in an array to support the pile cap, has a relatively short pile foundation length, does not require large - area foundation treatment, has strong bearing capacity, and is convenient for construction and low in cost.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A tower pile foundation for deep miscellaneous filled soil foundation includes a pile foundation, a pile cap and a column. The column is vertically arranged on the top surface of the pile cap, and the axis of the column is collinear with the axis of the pile cap. The pile foundation includes sub - micro piles and / or partition walls. The sub - micro piles and / or the partition walls are vertically arranged in an array on the bottom surface of the pile cap, and the pile foundation diameter D of the sub - micro piles satisfies 400mm < D < 800mm.
[0008] Preferably, the pile cap is a square pile cap, the row spacing of the sub - micro piles is the same as the column spacing of the sub - micro piles, and the distance l between two adjacent sub - micro piles and the pile foundation diameter D of the sub - micro piles satisfy l≥3D.
[0009] Preferably, the distance d between the sub - micropiles and the edge of the bearing platform and the pile foundation diameter D of the sub - micropiles satisfy d≥D, and the distance d between the sub - micropiles and the edge of the bearing platform is d≥150 mm.
[0010] Preferably, both the sub - micropiles and the partition walls are of reinforced concrete structure. A steel reinforcement cage or equivalent steel sections are provided inside the reinforced concrete structure, and the load - bearing strength of the equivalent steel sections is the same as that of the steel reinforcement cage.
[0011] Preferably, the rotation angle of the outer edge of the bearing platform relative to the line connecting the mid - points of the bearing platform and the iron tower is 45°, so as to increase the flexural section modulus.
[0012] Preferably, a number of the sub - micropiles are arranged in an array on the bottom surface of the bearing platform, and the graphic center of the sub - micropiles in the cross - section is located on the axis of the bearing platform.
[0013] Preferably, the partition wall includes an L - shaped corner partition wall, and the corner partition wall is used to equivalently replace at least three of the sub - micropiles at the corner of the bottom surface of the bearing platform.
[0014] Preferably, the partition wall includes a straight - shaped short partition wall, and the short partition wall is used to equivalently replace the sub - micropiles at the four corners of the bearing platform and at least one adjacent sub - micropile.
[0015] Preferably, the partition wall includes a straight - shaped side partition wall, and the side partition wall is used to equivalently replace the sub - micropiles on one side of the bearing platform.
[0016] Preferably, the partition wall includes a cross - shaped central partition wall, and the central partition wall is used to equivalently replace the sub - micropile at the center of the bottom surface of the bearing platform and at least four adjacent sub - micropiles, and at least four adjacent sub - micropiles are all in different orientations.
[0017] The iron tower pile foundation for deep miscellaneous - filled soil foundation provided by the present utility model uses the sub - micropiles and / or partition walls arranged in an array to support the bearing platform. Compared with the existing shallow foundation scheme, it does not require large - area foundation treatment; compared with the existing single - pile foundation scheme, the pile foundation is entirely arranged in the miscellaneous fill, significantly shortening the pile foundation length; compared with the existing micro - pile foundation scheme, the sub - micropiles have a larger pile diameter and a shorter pile length, so the stiffness and compressive strength of the sub - micropiles are higher and it is not easy to undergo buckling deformation; therefore, it has strong load - bearing capacity, is convenient for construction, has strong operability, and has a lower cost. Description of the Drawings
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.
[0019] Figure 1 It is a schematic cross-sectional view of the iron tower pile foundation for deep miscellaneous filled soil foundation provided by the present invention;
[0020] Figure 2 It is a schematic structural view of a single pile foundation;
[0021] Figure 3 It is a schematic plan distribution view of the first specific embodiment of the iron tower pile foundation for deep miscellaneous filled soil foundation;
[0022] Figure 4 It is a schematic plan distribution view of the second specific embodiment of the iron tower pile foundation for deep miscellaneous filled soil foundation;
[0023] Figure 5 It is a schematic plan distribution view of the third specific embodiment of the iron tower pile foundation for deep miscellaneous filled soil foundation;
[0024] Figure 6 It is a schematic plan distribution view of the fourth specific embodiment of the iron tower pile foundation for deep miscellaneous filled soil foundation;
[0025] Figure 7 It is a schematic plan distribution view of the fifth specific embodiment of the iron tower pile foundation for deep miscellaneous filled soil foundation;
[0026] Figure 8 It is a schematic plan distribution view of the sixth specific embodiment of the iron tower pile foundation for deep miscellaneous filled soil foundation;
[0027] Figure 9 It is a schematic plan distribution view of the seventh specific embodiment of the iron tower pile foundation for deep miscellaneous filled soil foundation;
[0028] Figure 10 It is a schematic plan distribution view of the eighth specific embodiment of the iron tower pile foundation for deep miscellaneous filled soil foundation.
[0029] Figures 1 - 10 Wherein:
[0030] 1 - Pile foundation; 11 - Secondary micropile; 12 - Partition wall; 2 - Cap; 3 - Column. Detailed implementation manners
[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0032] The core of the present invention is to provide a tower pile foundation for deep miscellaneous filled soil foundation, which uses sub-miniature piles and / or partition walls arranged in an array to support the pile foundation. The pile foundation has a short length, does not require large-area foundation treatment, has strong bearing capacity, and is convenient for construction and has low cost.
[0033] The tower pile foundation for deep miscellaneous filled soil foundation provided by the present invention includes a pile foundation 1, a bearing platform 2, and a column 3. The column 3 is vertically arranged on the top surface of the bearing platform 2, and the axis of the column 3 is collinear with the axis of the bearing platform 2. The pile foundation 1 includes sub-miniature piles 11 and / or partition walls 12. The sub-miniature piles 11 and / or partition walls 12 are vertically arranged in an array on the bottom surface of the bearing platform 2. The pile diameter D of the sub-miniature piles 11 satisfies 400mm < D < 800mm.
[0034] Please refer to Figure 1 , both the bearing platform 2 and the pile foundation 1 at the bottom are buried in the deep miscellaneous filled soil foundation, and part of the column 3 is buried in the deep miscellaneous filled soil foundation; the column 3 is connected to the tower leg of the tower through anchor bolts, and the load of the tower is transmitted to the bearing platform 2, and then dispersed and transmitted to the pile foundation 1 through the bearing platform 2.
[0035] The bearing platform 2 and the pile foundation 1 at the bottom are the main load-bearing parts of the pile foundation. The two are usually set as reinforced concrete structures. In order to enhance the connection strength between the two and avoid the offset of the steel cage structure of the pile foundation 1 during concrete pouring, the steel cage structure of the pile foundation 1 is connected to the steel cage structure of the bearing platform 2, and the two are usually connected by tying, welding, etc.
[0036] The pile foundation 1 can be specifically set as sub-miniature piles 11 and / or partition walls 12. The pile diameter D of the sub-miniature piles 11 is 400mm < D < 800mm. Compared with the miniature piles with a pile diameter of 200 - 400mm, the sub-miniature piles 11 have a larger pile diameter, higher compressive strength, stronger bearing capacity, smaller pile body buckling deformation caused by the lack of lateral restraint of the miscellaneous filled soil foundation, and shorter pile foundation length, and lower construction difficulty;
[0037] At the same time, the sub-miniature piles 11 are arranged in an array. When slurry leakage occurs during the pouring of the pile body, the adjacent sub-miniature piles 11 can complement each other to a large extent to fill the gaps in the miscellaneous filled soil foundation, consolidate the miscellaneous filled soil foundation, and improve the bearing capacity of the foundation.
[0038] The partition wall 12 is set with the same strength as the sub - micropiles 11 to ensure the stiffness and load - bearing capacity of the partition wall 12, which is the same as or higher than that of the replaced sub - micropiles 11; compared with the sub - micropiles 11, the partition wall 12 has a larger contact area with the miscellaneous - filled soil foundation, which is beneficial to increasing the filling range of the slurry in the miscellaneous - filled soil foundation and improving the bearing capacity of the miscellaneous - filled soil foundation.
[0039] Preferably, after the casting of the pile foundation 1 is completed, the miscellaneous - filled soil foundation within a certain range at the bottom and side of the pile can be strengthened to further improve the bearing capacity of the miscellaneous - filled soil foundation.
[0040] The pile foundation 1 can be formed by the rotary - drilling method or constructed by the all - steel casing following method. The specific construction method can be determined according to the structure and size of the pile foundation 1 in actual production; and after the construction of the pile foundation 1 is completed, the single - pile bearing capacity and pile - body integrity of the pile foundation 1 need to be detected to ensure the stability and reliability of the pile foundation 1.
[0041] The pile foundation 1 can be entirely set as sub - micropiles 11. As Figure 3 shown, a number of sub - micropiles 11 are arranged in an array on the bottom surface of the bearing platform 2, and the graphic center of the sub - micropiles 11 in the cross - section is located on the axis of the bearing platform 2 to ensure relatively uniform stress on each sub - micropile 11; it can also be entirely set as the partition wall 12, as Figure 6 、 Figure 7 、 Figure 9 and Figure 10 shown; or it can also be provided with both sub - micropiles 11 and partition walls 12, as Figure 4 、 Figure 5 and Figure 8 shown.
[0042] To avoid uneven settlement of the pile foundation under heavy loads, which may affect the stability and bearing capacity of the pile foundation, the pedestal column 3 is arranged in the center of the bearing platform 2, and the axis of the pedestal column 3 is collinear with the axis of the bearing platform 2 to make the distribution of the load in the bearing platform 2 relatively uniform; the sub - micropiles 11 and / or the partition walls 12 are arranged in an array on the bottom surface of the bearing platform 2 to ensure that the load received by the bearing platform 2 can be relatively evenly distributed to each sub - micropile 11 and / or partition wall 12, avoiding excessive settlement caused by local stress concentration and ensuring the uniform settlement of the pile foundation.
[0043] The specific quantity, shape, structure and size of the sub - micropiles 11 and / or the partition walls 12 are determined according to the bearing capacity of the deep miscellaneous - filled soil foundation, the mass and size of the iron tower, etc. in actual production, and are checked and calculated based on the design load intensity, etc. to ensure the bearing capacity of the pile foundation 1;
[0044] The specific shapes, structures and sizes of both the bearing platform 2 and the pedestal column 3 need to be determined according to the quantity, structure, size and distribution of the pile foundation 1.
[0045] For example, to ensure the bearing capacity and uniform stress distribution of the pile foundation column, the bearing platform 2 is set as a square bearing platform, and the row spacing of the sub-miniature piles 11 and the column spacing of the sub-miniature piles 11 are set to be the same. The distance l between any two adjacent sub-miniature piles 11 and the pile foundation diameter D of the sub-miniature piles 11 satisfy l≥3D; the distance d between the sub-miniature piles 11 and the edge of the bearing platform 2 and the pile foundation diameter D of the sub-miniature piles 11 satisfy d≥D, and the distance d between the sub-miniature piles 11 and the edge of the bearing platform 2 is d≥150mm.
[0046] In this embodiment, the bearing platform 2 is supported by the arrayed sub-miniature piles 11 and / or the partition walls 12. Compared with the existing shallow foundation scheme, there is no need for large-area foundation treatment; compared with the existing single-pile foundation scheme, the pile foundation is entirely arranged in the miscellaneous fill soil, significantly shortening the pile foundation length; compared with the existing mini-pile foundation scheme, the sub-miniature piles 11 have a larger pile diameter and a shorter pile length, so the sub-miniature piles 11 have higher stiffness and compressive strength, stronger bearing capacity, and are not prone to buckling deformation; therefore, the above pile foundation has strong anti-load capacity, is convenient for construction, has strong operability, and has a lower cost.
[0047] Preferably, in order to facilitate the pouring construction of the pile foundation 1, the steel cage structure of the pile foundation 1 can be replaced with an equivalent steel section. The equivalent steel section includes an equivalent circular steel pipe, an equivalent I-beam, etc., and the load strength of the equivalent steel section is the same as that of the steel cage structure.
[0048] The load strength of the equivalent steel section is the same as that of the steel cage structure. Therefore, their compressive load strength, bending load strength, and shear load strength are the same. While ensuring the strength of the pile foundation 1, the binding process of the steel cage is omitted, facilitating the pouring construction of the pile foundation 1.
[0049] Based on the above embodiments, please refer to Figures 3 - 10 , the rotation angle of the outer edge of the bearing platform 2 relative to the connection line between the midpoint of the bearing platform 2 and the midpoint of the iron tower is 45°, that is, the bearing platform 2 of the pile foundation rotates 45° to enhance the bending moment of inertia; and when the design load strength of the pile foundation is certain, setting the bearing platform 2 of the pile foundation to rotate can reduce the size of the pile foundation and lower the construction cost.
[0050] Based on the above embodiments, the structure of the partition wall 12 is defined. Please refer to Figure 4 、 Figure 6 and Figure 7 , the partition wall 12 includes an L-shaped corner partition wall, and the corner partition wall is used to equivalently replace at least three sub-miniature piles 11 at the corner of the bearing platform 2. The above sub-miniature piles 11 include corner piles at the corner of the bearing 2 and at least one sub-miniature pile 11 adjacent to the corner pile on both sides. The corner partition wall can adapt to the characteristics of the largest tension and compression forces at the corner of the bearing platform 2, reduce the settlement of the pile foundation at the corner of the bearing platform 2, and further reduce the uneven settlement of the pile foundation;
[0051] Please refer to Figure 5 , the partition wall 12 includes a short partition wall in a straight line shape, and the short partition wall is used to equivalently replace the sub-miniature piles 11 at the four corners of the bearing platform 2 and at least one adjacent sub-miniature pile 11. The short partition wall in a straight line shape can also enhance the load intensity at the corner of the bearing platform 2 to reduce the settlement of the pile foundation at the corner of the bearing platform 2;
[0052] Please refer to Figures 7 - 10 , the partition wall 12 includes a side partition wall in a straight line shape, and the side partition wall is arranged along the outer edge of the bearing platform 2 and is used to equivalently replace the sub-miniature piles 11 on one side of the bearing platform 2. It has a large lateral stiffness and uplift and compression bearing capacity. However, due to the narrow and long side partition wall, it is easy to have a hole collapse during construction, and the construction difficulty is relatively high;
[0053] Please refer to Figure 6 , Figure 7 , Figure 9 and Figure 10 , the partition wall 12 includes a central partition wall in a cross shape, and the central partition wall is used to equivalently replace the sub-miniature pile 11 at the center of the bottom surface of the bearing platform 2 and at least four adjacent sub-miniature piles 11, and at least four adjacent sub-miniature piles 11 are all located in different directions. The central partition wall has a large lateral stiffness and uplift and compression bearing capacity, but due to its large size, the construction difficulty is relatively high.
[0054] It should be noted that the wall body of the central partition wall can be arranged orthogonally to the outer edge of the bearing platform 2, as shown in Figure 6 , Figure 9 , or it can extend along the diagonal of the bearing platform 2, as shown in Figure 7 and Figure 10 ;
[0055] Of course, the rotation angle of the central partition wall relative to the bearing platform 2 is not limited to the above 0° and 45° layouts and can be set to any angle as needed.
[0056] In a specific embodiment, the side length of the bearing platform 2 is 8.4 m, the height is 1.2 m, the pedestal column 3 is arranged in the center of the bearing platform 2, the diameter of the pedestal column 3 is 1.8 m, the height is 2.4 m, and 25 sub-miniature piles 11 are arranged in an array at the bottom of the bearing platform 2. The pile foundation diameter of the sub-miniature pile 11 is 0.6 m, and the pile foundation length is 15 m;
[0057] The sub-miniature piles 11 at the corner of the bearing platform 2 can be replaced by a corner partition wall or a short partition wall. The limb length of the corner partition wall and the length of the short partition wall are both 2.4 m, the thickness of both is 0.6 m, and the height of both is 10 m;
[0058] The sub-miniature piles 11 at the edge of the bearing platform 2 can be replaced by a side partition wall. The length of the side partition wall is 7.2 m, the thickness is 0.6 m, and the height is 8.5 m;
[0059] The secondary micro-column 11 in the center of the bearing platform 2 can be replaced by a central partition wall, and the central partition wall has a length of 5.7 m, a thickness of 0.6 m, and a height of 8.5 m.
[0060] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.
[0061] The above has introduced in detail the iron tower pile foundation for deep miscellaneous fill soil foundation provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.
Claims
1. A tower pile foundation for deep mixed fill foundation, characterized in that: The invention comprises a pile foundation (1), a capping platform (2) and a column (3), wherein the column (3) is vertically arranged on the top surface of the capping platform (2), and the axis of the column (3) is colinear with the axis of the capping platform (2). The pile foundation (1) comprises sub-micro piles (11) and / or partition walls (12), and the sub-micro piles (11) and / or the partition walls (12) are vertically arranged in an array on the bottom surface of the capping platform (2), and the pile foundation diameter D of the sub-micro piles (11) satisfies 400 mm < D < 800 mm.
2. The iron tower pile foundation for deep mixed fill foundation according to claim 1, characterized in that: The support platform (2) is a square support platform, the row spacing of the sub-micro piles (11) is the same as the column spacing of the sub-micro piles (11), and the spacing l between two adjacent sub-micro piles (11) and the pile base diameter D of the sub-micro piles (11) satisfy l≥3D.
3. The iron tower pile foundation for deep mixed fill foundation according to claim 1, characterized in that: The distance d between the secondary micro pile (11) and the edge of the cap (2) and the pile foundation diameter D of the secondary micro pile (11) satisfy d≥D, and the distance d between the secondary micro pile (11) and the edge of the cap (2) is ≥150 mm.
4. The iron tower pile foundation for deep mixed fill foundation according to claim 1, characterized in that: The secondary micro pile (11) and the partition wall (12) are both reinforced concrete structures, a steel cage or equivalent steel is provided inside the reinforced concrete structure, and the load strength of the equivalent steel is the same as the load strength of the steel cage.
5. The iron tower pile foundation for deep mixed fill foundation according to any one of claims 1 to 4, characterized in that: The rotation angle of the outer edge of the pedestal (2) relative to the line connecting the midpoint of the pedestal and the midpoint of the tower is 45°, so as to increase the bending section modulus.
6. The iron tower pile foundation for deep mixed fill foundation according to claim 5, characterized in that: A plurality of sub-micro piles (11) are arranged in an array on the bottom surface of the support platform (2), and the center of the sub-micro piles (11) in the cross section is located on the axis of the support platform (2).
7. The iron tower pile foundation for deep mixed fill foundation according to claim 6, characterized in that: The partition wall (12) comprises an L-shaped corner partition wall, and the corner partition wall is used to equivalently replace at least three of the sub-micro piles (11) at the corners of the bottom surface of the base (2).
8. The iron tower pile foundation for deep mixed fill foundation according to claim 6, characterized in that: The partition wall (12) comprises a short partition wall in the shape of a straight line, and the short partition wall is used to equivalently replace the sub-micro piles (11) at the four corners of the base (2) and at least one adjacent sub-micro pile (11).
9. The iron tower pile foundation for deep mixed fill foundation according to claim 6, characterized in that: The partition wall (12) comprises a straight-line side partition wall, and the side partition wall is used to equivalently replace the secondary micro pile (11) on one side of the base (2).
10. The iron tower pile foundation for deep mixed fill foundation according to claim 6, characterized in that: The partition wall (12) comprises a cross-shaped central partition wall, the central partition wall being used to equivalently replace the sub-micro pile (11) at the center of the bottom surface of the base (2) and at least four adjacent sub-micro piles (11), and the at least four adjacent sub-micro piles (11) are all located in different directions.