Novel cylindrical rib pedestal pile

Abstract

The utility model discloses a novel cylindrical rib pedestal pile. The novel cylindrical rib pedestal pile comprises an inner pile, an outer cylinder, an inner main rib plate and an outer auxiliary rib plate which are made of a steel material, the outer barrel is arranged on the outer side of the bottom of the inner pile, the at least two inner main rib plates are arranged in a crossed mode and connected with the inner pile in a penetrating mode, and the outer ends of the inner main rib plates are fixedly connected with the inner side wall of the outer barrel; and each outer auxiliary rib plate is connected with the upper side surface of the inner main rib plate and the outer side surface of the inner pile. The outer barrel at the bottom of the inner pile and the inner main rib plates can provide compression resistance, pulling resistance and horizontal bearing capacity, the outer auxiliary rib plates equivalently increase the diameter of the inner pile, and the overall horizontal bearing capacity is also improved. The outer auxiliary rib plate supports and reinforces the strength and rigidity of the inner pile, and deformation of the inner pile can be reduced. The diameter of the inner pile can be reduced, the mud entering depth of the inner pile is shortened, and the steel consumption is reduced. And the inner pile is prevented from encountering bedrock due to overlong length, so that the extra socketed pile construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of fixed pile structures, in particular to a novel tube-rib expanded-bottom pile. Background Art

[0002] At present, the foundation investment of offshore photovoltaic and offshore wind power projects accounts for about 25% to 40% of the total construction cost. The construction of offshore pile foundations is extremely expensive, and how to reduce the cost of pile foundations is a topic worth studying.

[0003] Especially in offshore photovoltaic projects, the cost of pile foundation accounts for 35%-40%, which has become a pain point affecting the return on project investment, and the demand for cost reduction is particularly prominent.

[0004] There are two main technical solutions for pile foundations in related technologies. Among them, the first technical solution is to use prestressed high-intensity concrete (PHC) pipe piles, commonly known as PHC pipe piles. PHC pipe piles are used in shallow waters such as tidal flats, as well as foundations such as offshore photovoltaic small transformer box brackets. Their scope of application is relatively small. PHC pipe piles have the following technical defects: (1) The diameter of PHC pipe piles is generally less than 0.8m, and the concrete material has insufficient tensile bearing capacity and bending resistance. It cannot be used on large-scale platform photovoltaic panel brackets with a water depth of more than 10m. (2) Welding is required during the construction process, and the pile head is prone to bursting during piling.

[0005] The second technical solution is to use steel pipe piles. Conventional steel pipe piles are mostly variable diameter structures. The diameter of the steel pipe piles gradually decreases from bottom to top in the height direction. The steel pipe piles mainly rely on the friction of the outer wall of the steel pipe pile to provide compressive and tensile bearing capacity, and the bearing capacity provided by the pile end is extremely small. The compressive and tensile bearing capacity is improved by increasing the diameter and length of the steel pipe piles under the mud and increasing the friction area of ​​the outer pile body. If the pile diameter is too large, it will also increase the resistance of the ocean current, intensify the scouring, increase the depth of the scouring pit, and change the seabed environment. For example, the diameter of some steel piles reaches 2m, causing the depth of the scouring pit to reach 3m, changing the seabed environment. When increasing the pile length, bedrock is often encountered, and rock-embedded construction is required, which increases the construction cost and construction period exponentially. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a novel tube rib expanded bottom pile to improve the compression resistance, pull-out resistance and horizontal bearing capacity, reduce the pile length, avoid rock embedding, reduce the steel consumption and reduce the construction cost.

[0007] The technical solution adopted by the utility model to solve the technical problem is: construct a new type of tube rib bottom expanded pile, including an inner pile, an outer tube, an inner main rib plate and an outer auxiliary rib plate made of steel material;

[0008] The outer cylinder is arranged outside the bottom of the inner pile, the number of the inner main ribs is at least two, at least two inner main ribs are arranged crosswise with each other, the inner main ribs are passed through and connected to the inner pile, and the outer ends of the inner main ribs are fixedly connected to the inner side wall of the outer cylinder;

[0009] There are multiple outer auxiliary ribs, and each outer auxiliary rib is connected to the upper side surface of the inner main rib and the outer side surface of the inner pile.

[0010] In some embodiments, the inner pile is provided with a through hole penetrating through the inner and outer wall surfaces thereof for the inner main rib to pass through.

[0011] In some embodiments, a limiting slot is provided in the middle of the length direction of each inner main rib, and at least two inner main ribs are fixed to each other through the limiting slot.

[0012] In some embodiments, the inner pile, the outer tube and the inner main rib are fixed by welding, and the inner pile, the inner main rib and the outer auxiliary rib are fixed by welding.

[0013] In some embodiments, the diameter of the inner pile is 1.0-2.0 mm, and the wall thickness of the inner pile is 15-25 mm.

[0014] In some embodiments, the height of the outer cylinder is one times the diameter of the outer cylinder itself.

[0015] In some embodiments, the diameter of the outer cylinder is 2.0-4.5 m, and the height of the outer cylinder is 2.0-4.5 m.

[0016] In some embodiments, the diameter of the outer cylinder is 2.0-3.0 times the diameter of the inner column.

[0017] In some embodiments, the inner main rib is a rectangular plate structure, the length of the inner main rib is 2.0-4.5m, the height is 1.5-3.5m, and the wall thickness is 15-25mm.

[0018] In some embodiments, the outer auxiliary rib is a rectangular plate structure, and the length of the outer auxiliary rib is 1.0-2.0 m smaller than the length of the inner pile.

[0019] In some embodiments, the wall thickness of the outer auxiliary rib is 15-25 mm.

[0020] In some embodiments, the inner pile, the outer tube, the inner main ribs and the outer auxiliary ribs are all made of Q355C.

[0021] The implementation of the utility model has the following beneficial effects: the new barrel-rib expanded bottom pile adds an outer barrel, inner main ribs and outer auxiliary ribs at the bottom of the inner pile, and can rely on the outer barrel and inner main ribs at the bottom of the inner pile to provide compression, pull-out and horizontal bearing capacity. The outer auxiliary ribs increase the diameter of the inner pile equivalently, and also improve the overall horizontal bearing capacity. The outer auxiliary ribs support and strengthen the strength and rigidity of the inner pile, which can reduce the deformation of the inner pile. The diameter of the inner pile can be reduced, the depth of the inner pile into the mud can be shortened, and the amount of steel used can be reduced. It is prevented that the inner pile is too long and encounters the bedrock, thereby reducing the construction cost of additional rock-embedded piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a novel cylindrical rib expanded bottom pile in some embodiments of the utility model;

[0024] Figure 2 is a top view of a novel barrel-ribbed, bottom-enlarged pile in some embodiments of the utility model;

[0025] Figure 3 It is a side view of a novel barrel-ribbed expanded-bottom pile in some embodiments of the utility model;

[0026] Figure 4 It is a schematic diagram of the structure of the inner pile in some embodiments of the utility model;

[0027] Figure 5 is a cross-sectional view of an inner pile in some embodiments of the utility model;

[0028] Figure 6 It is a structural schematic diagram of the inner main rib in some embodiments of the utility model;

[0029] Figure 7 It is a schematic diagram of the structure of an offshore fixed platform in some embodiments of the utility model.

[0030] Among them, the figure marks are: 10-inner pile, 10a-inner wall surface, 10b-outer wall surface, 11-through hole, 11a-first through hole, 11b-second through hole, 11c-third through hole, 11d-fourth through hole, 20-outer cylinder, 30-inner main rib, 31-limiting slot, 40-outer auxiliary rib, 100-bracket, A-mud surface. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0032] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0033] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0034] See also Figures 1 to 3 The utility model shows a novel barrel rib bottom expanded pile, comprising an inner pile 10, an outer barrel 20, an inner main rib plate 30 and an outer auxiliary rib plate 40 made of steel material. The inner pile 10 and the outer barrel 20 can both be round tube structures.

[0035] The outer cylinder 20 is arranged outside the bottom of the inner pile 10, and a gap is left between the inner side surface of the outer cylinder 20 and the outer side surface of the inner pile 10. Preferably, the inner pile 10 and the outer cylinder 20 are coaxially arranged, and the bottom surfaces of the inner pile 10 and the outer cylinder 20 are in the same plane.

[0036] The number of the inner main ribs 30 is at least two, and at least two of the inner main ribs 30 are arranged crosswise with each other. The inner main ribs 30 are penetrated and connected to the inner pile 10, and the outer end of the inner main ribs 30 is fixedly connected to the inner side wall of the outer tube 20. Preferably, the number of the inner main ribs 30 is two, and the two inner main ribs 30 are arranged perpendicularly to each other, and are used to connect and fix the inner pile 10 and the outer tube 20. That is, the "mutually crossed arrangement" of the present application includes the situation of "mutually perpendicular arrangement". The lower surface of the inner main rib 30 can be arranged flush with the lower surface of the outer tube 20, and the upper surface of the inner main rib 30 can be arranged flush with the upper surface of the outer tube 20, or the height dimension of the inner main rib 30 is smaller than the height dimension of the outer tube 20.

[0037] The number of the outer auxiliary ribs 40 is multiple, and each of the outer auxiliary ribs 40 connects the upper side of the inner main rib 30 and the outer side of the inner pile 10. Preferably, when the number of the inner main ribs 30 is n, and n is a natural number greater than 2, the number of the outer auxiliary ribs 40 is 2n. Wherein, when the number of the inner main ribs 30 is two, the number of the outer auxiliary ribs 40 is four. The upper part of the outer auxiliary rib 40 protrudes from the upper surface of the outer tube 20, and the height dimension / length dimension of the outer auxiliary rib 40 is smaller than the height dimension / length dimension of the inner pile 10.

[0038] The new barrel-ribbed expanded bottom pile includes an inner pile 10, an outer barrel 20, an inner main rib plate 30 and an outer auxiliary rib plate 40 made of steel material. The compression, bending and tensile resistance of steel are better than concrete. The new barrel-ribbed expanded bottom pile is based on the basic principle of marine soil mechanics: the bearing capacity provided by the marine soil at the bottom of the pile is much higher than that of the shallow soil. By arranging the outer barrel 20, the inner main rib plate 30 and the outer auxiliary rib plate 40 at the bottom of the inner pile 10, the diameter of the bottom of the new barrel-ribbed expanded bottom pile is enlarged, the friction force area is increased, and the compression, tensile and horizontal bearing capacity of the bottom of the new barrel-ribbed expanded bottom pile are doubled. Under the condition of meeting the requirements of the upper structure, the pile length is greatly reduced. In addition, the outer auxiliary rib plate 40 is arranged on the outside of the inner pile 10, which can effectively strengthen the strength and rigidity of the inner pile 10, and can appropriately reduce the diameter of the inner pile 10, so that the overall steel consumption of the new barrel-ribbed expanded bottom pile is reduced, and the cost is reduced.

[0039] Combination Figure 2 , Figure 4 and Figure 5As shown, in some embodiments, the inner pile 10 is provided with a through hole 11 penetrating through its inner and outer walls for the inner main rib 30 to pass through, and the through hole 11 can be arranged at the bottom of the inner pile 10, wherein the inner main rib 30 passes through the corresponding through hole 11 and is then fixed by welding. The size of the through hole 11 is similar to the longitudinal section size of the inner main rib 30. Figure 5 As shown, when the number of the inner main ribs 30 is two, the inner pile 10 is provided with a first through hole 11a, a second through hole 11b, a third through hole 11c, and a fourth through hole 11d which pass through the inner wall surface 10a and the outer wall surface 10b thereof, the first through hole 11a is arranged opposite to the second through hole 11b, the third through hole 11c is arranged opposite to the fourth through hole 11d, the first inner main rib 30 passes through the first through hole 11a and the second through hole 11b, and the second inner main rib 30 passes through the third through hole 11c and the fourth through hole 11d.

[0040] like Figure 6 As shown, in some embodiments, each inner main rib 30 is provided with a limit slot 31 in the middle of the length direction, and at least two inner main ribs 30 are mutually clamped and fixed through the limit slot 31, and then the assembled inner main ribs 30 can be welded and fixed. Figure 6 As shown, when the number of the inner main ribs 30 is two, the two inner main ribs 30 can be mutually clamped and fixed through the limiting clamping groove 31 along the direction of the arrow, and then the assembled inner main ribs 30 can be welded and fixed.

[0041] Preferably, the height dimension of the limiting slot 31 of each inner main rib 30 can be half of the height dimension of the entire inner main rib 30. Therefore, after the two inner main ribs 30 are clamped together, the upper end surfaces of the two inner main ribs 30 can be set flush, and the lower end surfaces of the two inner main ribs 30 can also be set flush, and the limiting slots 31 of the inner main ribs 30 are more convenient to process and have better product consistency.

[0042] In some embodiments, the material of the inner pile 10, the outer tube 20, the inner main rib 30 and the outer auxiliary rib 40 are all Q355C. Of course, the inner pile 10, the outer tube 20, the inner main rib 30 and the outer auxiliary rib 40 can also be made of other types of steel according to actual needs, which is not specifically limited here.

[0043] In some embodiments, the inner pile 10, the outer tube 20 and the inner main rib 30 are welded and fixed, and the inner pile 10, the inner main rib 30 and the outer auxiliary rib 40 are welded and fixed. Specifically, both ends of the inner main rib 30 are welded and fixed to the inner side surface of the outer tube 20, the inner main rib 30 is welded and fixed to the wall surface of the inner pile 10, and the joints of the assembled inner main ribs 30 are welded and fixed. One side of the outer auxiliary rib 40 in the height direction is welded and fixed to the outer side surface of the inner pile 10, and the lower bottom surface of the outer auxiliary rib 40 is welded and fixed to the upper side surface of the inner main rib 30 located between the inner pile 10 and the outer tube 20.

[0044] The inner pile 10, the outer tube 20, the inner main rib 30 and the outer auxiliary rib 40 are made of Q355C steel, and the quality standard can be "Low Alloy High Strength Structural Steel" (GB / T091-2008). The welding rod can be E50 type, and the quality standard can be "Non-alloy Steel and Fine Grain Steel Welding Rod" (GB / T 5117-2012). Butt welding is adopted, the circumferential seam is the first-level weld, and the longitudinal seam is the second-level weld.

[0045] In some embodiments, the inner pile 10 can be made of Q355C steel pipe pile, the diameter of the inner pile 10 is 1.0-2.0m, and the wall thickness of the inner pile 10 is 15-25mm. For example, the diameter of the inner pile 10 is 1.0m, 1.1m, 1.2m, 1.3m, 1.4m, 1.5m, 1.6m, 1.7m, 1.8m, 1.9m or 2.0m. The wall thickness of the inner pile 10 can be 15mm, 20mm or 25mm. The pile length of the inner pile 10 is calculated and determined according to the upper load and the mechanical properties of the seabed soil, and generally does not exceed 20m into the mud. The inner pile 10 is used to provide support for the upper structure.

[0046] In some embodiments, the height of the outer cylinder 20 is one times the diameter of the outer cylinder 20 itself, and the diameter of the outer cylinder 20 is 2.0-3.0 times the diameter of the inner pile 10. The diameter of the outer cylinder 20 is 2.0-4.5m, and the height of the outer cylinder 20 is 2.0-4.5m. For example, the diameter of the outer cylinder 20 can be 2m, 2.5m, 3m, 3.5m, 4m or 4.5m, and correspondingly, the height of the outer cylinder 20 can be 2m, 2.5m, 3m, 3.5m, 4m or 4.5m. The wall thickness of the outer cylinder 20 is 15-25mm, for example, the wall thickness of the outer cylinder 20 can be 15mm, 20mm or 25mm. The size of the outer cylinder 20 can be calculated and determined according to the upper load and the mechanical properties of the seabed soil. The outer cylinder 20 mainly provides the inner and outer wall side friction resistance, end resistance, and is used to wrap the soil.

[0047] In some embodiments, the inner main rib 30 is used to connect the inner pile 10 and the outer tube 20, and provide side friction resistance and end resistance. The inner main rib 30 is roughly a rectangular plate structure. The length of the inner main rib 30 is the same as the inner diameter of the outer tube 20. The length of the inner main rib 30 is 2.0-4.5m, and the height of the inner main rib 30 is 1.5-3.5m. The height of the inner main rib 30 is generally 0.3-1.0m less than its length. The wall thickness of the inner main rib 30 is 15-25mm. For example, the length of the inner main rib 30 can be 2m, 2.5m, 3m, 3.5m, 4m or 4.5m, the height of the inner main rib 30 is 1m, 1.5m, 2m, 2.5m, 3m or 3.5m, and the wall thickness of the inner main rib 30 can be 15mm, 20mm or 25mm. Of course, the size of the inner main rib 30 can be selected and set according to actual needs, and is not specifically limited here.

[0048] In some embodiments, the outer auxiliary rib plate 40 is used to strengthen the strength and rigidity of the inner pile 10, reduce the deformation of the inner pile 10, increase the horizontal force of the inner pile 10, and also provide a small amount of lateral friction. The outer auxiliary rib plate 40 is a rectangular plate-shaped structure, and the length of the outer auxiliary rib plate 40 is 1.0-2.0m smaller than the length of the inner pile 10. The wall thickness of the outer auxiliary rib plate 40 is equivalent to the wall thickness of the inner main rib plate 30, and the wall thickness of the outer auxiliary rib plate 40 is 15-25mm, for example, the wall thickness of the outer auxiliary rib plate 40 can be 15mm, 20mm or 25mm. The width of the outer auxiliary rib plate 40 is 10-20cm, for example, the width of the outer auxiliary rib plate 40 can be 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm or 20cm. Of course, the size of the outer auxiliary rib 40 can be selected and set according to actual needs, and is not specifically limited here.

[0049] In marine soil, the shear strength index of the soil is generally proportional to the burial depth of the soil. The greater the burial depth, the greater the vertical effective stress and horizontal stress on the soil, and the higher the shear strength. The soil provides stronger compressive, tensile and horizontal bearing capacity. The shear strength of the silty soil on the seabed surface generally only reaches 10kpa, while the shear strength of the clay soil 10m below the seabed can reach more than 40kpa. The friction resistance provided by the unit area of ​​the soil at the bottom of the deep pile is several times higher than that provided by the shallow surface soil of the seabed. It is necessary to fully tap the bearing potential of the soil layer at the bottom of the pile.

[0050] The new barrel-ribbed expanded bottom pile adds an outer barrel 20, an inner main rib plate 30 and an outer auxiliary rib plate 40 at the bottom of the inner pile 10, and can rely on the outer barrel 20 and the inner main rib plate 30 at the bottom of the inner pile 10 to provide compression, pull-out and horizontal bearing capacity. A large gap is reserved between the inner pile 10, the outer barrel 20 and the inner main rib plate 30 to ensure that the inner pile 10 can be driven into the predetermined bearing layer by a high-energy pile driver. The friction resistance provided by the unit area of ​​soil at the bottom of the deep pile is much higher than the friction resistance provided by the shallow surface soil of the seabed. The outer barrel 20 and the inner main rib plate 30 can increase the friction force area between the bottom of the new barrel-ribbed expanded bottom pile and the soil by 5-6 times on both sides, doubling the friction resistance. At the same time, the cross-sectional area formed by the inner pile 10, the outer barrel 20 and the inner main rib plate 30 can increase the compression and pull-out end resistance by 2-4 times. The diameter of the outer barrel 20 is equal to 2-3 times the diameter of the inner pile, and the outer auxiliary rib plate 40 is equivalent to increasing the diameter of the inner pile 10, which also improves the overall horizontal bearing capacity. The outer auxiliary ribs 40 support and strengthen the strength and rigidity of the inner pile 10 , and can reduce deformation of the inner pile 10 .

[0051] The friction force exerted by the outer wall of the inner pile 10, the inner wall of the outer tube 20 and the inner main rib 30 surface wraps the foundation soil, and the inner pile 10, the outer tube 20, the inner main rib 30 and the bottom soil of the new tube rib expanded bottom pile form a whole, which can become a steel-encased soil expanded bottom pile. This effectively improves the overall compression resistance, pull-out resistance, horizontal bearing capacity and deformation resistance.

[0052] The diameter of the inner pile 10 can be reduced, the depth of the inner pile 10 into the mud can be shortened, and the amount of steel used can be reduced. The inner pile 10 can be prevented from being too long and encountering the bedrock, thereby reducing the construction cost of the additional rock-embedded pile.

[0053] like Figure 7 As shown, the utility model also discloses an offshore fixed platform, including the novel cylindrical rib bottom-enlarged pile of the above embodiment, and a bracket 100 installed on the top of the inner pile 10 of all the novel cylindrical rib bottom-enlarged piles. The bracket 100 can be, but is not limited to, an offshore photovoltaic bracket. Figure 7 The A plane in the figure is the mud surface.

[0054] In other embodiments, the novel barrel-rib expanded bottom pile can also be used as an anchoring system for offshore floating wind turbines, and can also be used as a pile foundation for other types of offshore fixed platforms.

[0055] This new type of barrel rib expanded bottom pile can be widely used in offshore photovoltaic projects as the pile foundation of large platform supports. With the same amount of steel, it can increase the compressive and tensile bearing capacity by 30%-100%. It can reduce the diameter of the inner pile 10, shorten the pile length, and reduce the amount of steel by 15%-50%.

[0056] This new type of barrel-rib expanded bottom pile can replace offshore rock-embedded piles, reducing construction costs and construction period.

[0057] During construction, conventional offshore piling methods can be used. By using a conventional diesel pile driver, a pile delivery cylinder is inserted into the outer cylinder 20, and the inner pile 10 and the outer cylinder 20 can be hammered at the same time, which can ensure that the new barrel rib expanded bottom pile can be driven into the bearing layer. The risk of pile slipping can be avoided, and offshore piling construction is safe and reliable.

[0058] The new type of barrel-rib expanded base pile can be constructed using conventional cutting and welding technology, which is conducive to large-scale promotion.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model shall fall within the scope of the claims of the utility model.

Claims

1. A new type of cylindrical rib expanded bottom pile, characterized in that: It comprises an inner pile (10), an outer cylinder (20), an inner main rib (30) and an outer auxiliary rib (40) all made of steel material; The outer cylinder (20) is arranged outside the bottom of the inner pile (10), the number of the inner main ribs (30) is at least two, at least two of the inner main ribs (30) are arranged crosswise with each other, the inner main ribs (30) are penetrated and connected to the inner pile (10), and the outer ends of the inner main ribs (30) are fixedly connected to the inner side wall of the outer cylinder (20); There are a plurality of outer auxiliary ribs (40), and each outer auxiliary rib (40) connects the upper side surface of the inner main rib (30) and the outer side surface of the inner pile (10).

2. The new type of cylindrical rib expanded bottom pile according to claim 1 is characterized in that: The inner pile (10) is provided with a through hole (11) penetrating through its inner and outer wall surfaces for the inner main rib plate (30) to pass through.

3. The new type of cylindrical rib expanded bottom pile according to claim 1 is characterized in that: A limiting slot (31) is provided in the middle of each inner main rib plate (30) in the length direction, and at least two inner main rib plates (30) are mutually clamped and fixed via the limiting slot (31).

4. The novel cylindrical rib expanded bottom pile according to claim 1 is characterized in that: The inner pile (10), the outer tube (20) and the inner main rib (30) are fixed by welding, and the inner pile (10), the inner main rib (30) and the outer auxiliary rib (40) are fixed by welding.

5. The novel cylindrical rib expanded bottom pile according to claim 1 is characterized in that: The diameter of the inner pile (10) is 1.0-2.0 mm, and the wall thickness of the inner pile (10) is 15-25 mm.

6. The novel cylindrical rib expanded bottom pile according to claim 1 is characterized in that: The height of the outer cylinder (20) is one times the diameter of the outer cylinder (20) itself.

7. The new type of cylindrical rib expanded bottom pile according to claim 1 is characterized in that: The diameter of the outer cylinder (20) is 2.0-4.5 m, and the height of the outer cylinder (20) is 2.0-4.5 m.

8. The novel cylindrical rib expanded bottom pile according to claim 1 is characterized in that: The diameter of the outer cylinder (20) is 2.0-3.0 times the diameter of the inner pile (10).

9. The novel cylindrical rib expanded bottom pile according to claim 1 is characterized in that: The inner main rib (30) is a rectangular plate-shaped structure, the inner main rib (30) has a length of 2.0-4.5 m, a height of 1.5-3.5 m, and a wall thickness of 15-25 mm.

10. The novel cylindrical rib bottom-enlarged pile according to claim 1 is characterized in that: The outer auxiliary rib plate (40) is a rectangular plate-shaped structure, and the length dimension of the outer auxiliary rib plate (40) is 1.0-2.0 m smaller than the length dimension of the inner pile (10).

11. The novel cylindrical rib bottom-enlarged pile according to claim 10 is characterized in that: The wall thickness of the outer auxiliary rib (40) is 15-25 mm.

12. The novel cylindrical rib expanded bottom pile according to claim 1 is characterized in that: The material of the inner pile (10), the outer tube (20), the inner main rib (30) and the outer auxiliary rib (40) are all Q355C.

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