CN219315792U - Three-division bottom plate-three-division vertical ring combined concrete bearing platform foundation - Google Patents

Abstract

The utility model relates to a three-split bottom plate-three-split vertical ring combined concrete pile cap foundation, which comprises a prefabricated UHPC three-split vertical ring, a prefabricated UHPC three-split bottom plate and a steel support platform which are sequentially arranged from top to bottom, wherein a combined pile cap post-pouring concrete structure is arranged above the prefabricated UHPC three-split vertical ring, and a post-pouring interval is formed among the combined pile cap post-pouring concrete structure, the prefabricated UHPC three-split vertical ring and the prefabricated UHPC three-split bottom plate. The utility model has simple structure and reasonable design, improves the durability of the bearing platform, reduces the influence of complex sea conditions and climates on construction operation, improves construction safety, reduces construction difficulty, improves construction efficiency, realizes industrialized design, production, assembly and construction, and improves comprehensive economic benefit of the bearing platform.

Description

Three-division bottom plate-three-division vertical ring combined concrete bearing platform foundation

Three-division bottom plate-three-division vertical ring combined concrete bearing platform foundation

Technical Field

The utility model relates to a three-part bottom plate-three-part vertical ring combined concrete bearing platform foundation.

Background

Wind energy is an important form of renewable energy, including onshore wind power and offshore wind power. With the rapid development of wind farm construction on landing, offshore wind power becomes an important direction for wind energy development. The development and utilization of the offshore wind energy in China are late, but the development is rapid, the development is mainly focused on offshore shallow sea areas, and the fixed offshore wind power project is a main form of the current offshore wind energy development and utilization due to various factors such as manufacturing, installation, operation and maintenance costs and the like.

The foundation platform is an important device for a fixed offshore wind power project, and mainly adopts a reinforced concrete high pile cap foundation form. The foundation of the high pile cap is derived from an offshore independent pier foundation and a bridge pier foundation structure of the cross-sea bridge, the foundation of the table top consists of a plurality of small-diameter foundation piles driven into foundation soil, and the high pile cap has rich engineering practice in China, controllable construction risk and relatively low cost, so the high pile cap is widely applied to early offshore wind farms in China. However, since offshore construction and installation are affected by complex marine construction environments such as season and climate, it is an important development trend to realize efficient construction and installation of fixed foundation platforms. The defects of the existing cast-in-situ reinforced concrete bearing platform form are as follows:

(1) The offshore fixed wind power high pile foundation full cast-in-situ bearing platform has long construction period and low work efficiency.

The construction of the offshore wind power fixed high pile cap foundation is affected by seasons and weather, and the construction window period is limited. The traditional full cast-in-situ reinforced concrete bearing platform firstly needs to cast a bearing platform bottom plate on site, the thickness of the bottom plate is generally 600-800mm, the construction of the bearing platform bottom plate has a formwork supporting and removing circulation procedure, and the necessary support needs to be erected on site in a matching way. And then template engineering and reinforcement engineering are carried out on the bearing platform bottom plate, the working procedures are carried out in stages, the working procedures are more and complicated, and the construction period of the full cast-in-situ foundation bearing platform is long, and the construction work efficiency is low.

(2) The steel box template has a plurality of components, high component disassembly rate and long assembly time.

The offshore concrete bearing platform is of a large-size structure, and the size of the template of the bearing platform is easy to be larger. The existing steel box templates are various in design components, meanwhile, in order to facilitate land transportation, the steel box templates are required to be disassembled and transported, the component disassembly rate is high, and the assembly time is long.

(3) The steel box template has high cost and poor durability.

The fixed wind power high pile foundation full cast-in-situ reinforced concrete bearing platform consumes a large amount of steel box templates, and the template cost is high. The marine steel can be corroded by seawater, and the later maintenance of the template is needed, so that the turnover and amortization accounting cost of the template is affected. If the steel template is a permanent template free of disassembly, the one-time construction investment cost of the bearing platform is higher.

(4) The durability of reinforced concrete materials is a problem.

Because of the adoption of common high-performance reinforced concrete materials, the concrete adopts durability measures, but because of the severe offshore service environment, additional durability protection measures are often necessary for the fixed wind power high-pile foundation. Additional durability safeguards entail additional cost of measure. In addition, because of inadequate durability measures, in particularly severe corrosion sites such as tidal and splash areas, the platform structure may be damaged and worn early due to water flow flushing and dry and wet cycles, affecting the overall life of the platform equipment, and more cases of gradual aging failure of early-built ocean engineering have been found in recent years.

Disclosure of Invention

In order to solve the problems, the utility model provides a three-part bottom plate-three-part vertical ring combined concrete bearing platform foundation.

The utility model is composed by the steps that the post-pouring concrete structure comprises a prefabricated UHPC three-division vertical ring, a prefabricated UHPC three-division bottom plate and a steel support platform which are sequentially arranged from top to bottom, wherein a combined bearing platform post-pouring concrete structure is arranged above the prefabricated UHPC three-division vertical ring, and a post-pouring interval is formed among the combined bearing platform post-pouring concrete structure, the prefabricated UHPC three-division vertical ring and the prefabricated UHPC three-division bottom plate.

Further, the combined bearing platform post-pouring concrete structure comprises a steel foundation ring arranged in the middle of the prefabricated UHPC trisection bottom plate, a steel beam is arranged between a steel support platform part penetrating through the prefabricated UHPC trisection bottom plate and the steel foundation ring, and a core reinforced concrete layer is arranged in the post-pouring interval.

Further, a foundation ring lug steel plate is arranged at the lower part of the steel foundation ring and is connected with the prefabricated UHPC trisection bottom plate through foundation ring embedded bolts.

Further, the steel support platform comprises a steel pipe pile and a steel support bracket arranged on the outer side of the upper part of the steel pipe pile; the prefabricated UHPC trisection bottom plate is provided with a reserved hole for penetrating the upper portion of the steel pipe pile, and a column cap is arranged below the reserved hole and is used for being supported on the steel support bracket.

Further, a vertical ring L-shaped steel plate embedded part is arranged at the lower part of the prefabricated UHPC trisection vertical ring, a plurality of trapezoid stiffening plates used for enhancing the rigidity of the node are uniformly arranged on the inner side of the vertical ring L-shaped steel plate embedded part, and a steel bar opening used for penetrating a steel bar in a circumferential direction is reserved on each trapezoid stiffening plate.

Further, the prefabricated UHPC trisection vertical ring comprises a plurality of vertical ring bodies, the adjacent vertical ring bodies are connected through a vertical ring connecting structure, the front part and the rear part of the vertical ring connecting structure are provided with annular embedded parts, and vertical ring welding steel plates are arranged between the annular embedded parts of the adjacent vertical ring bodies; the vertical ring connecting structure comprises vertical ring key teeth and vertical ring grooves which are respectively arranged on two sides of the vertical ring body, and the vertical ring key teeth of one vertical ring body of the adjacent vertical ring bodies are matched with the vertical ring grooves of the other vertical ring body.

Further, a bottom plate vertical connection embedded part is arranged at the edge of the prefabricated UHPC trisection bottom plate, and the bottom plate vertical connection embedded part is welded with the vertical ring L-shaped steel plate embedded part; the edge part of the prefabricated UHPC trisection bottom plate is provided with a bottom plate annular bulge which is used for being matched with a vertical ring groove arranged below the prefabricated UHPC trisection vertical ring.

Further, a Y-shaped beam is arranged at the bottom of the prefabricated UHPC trisection bottom plate, the prefabricated UHPC trisection bottom plate comprises a plurality of bottom plates, the adjacent bottom plates are connected through a bottom plate connecting structure, the bottom plate connecting structure comprises a bottom plate wedge-shaped groove and bottom plate wedge-shaped key teeth, and the bottom plate wedge-shaped groove of one bottom plate of the adjacent bottom plates is matched with the wedge-shaped key teeth of the other bottom plate; the bottom plate connecting structure is provided with a bottom plate horizontal connection embedded part, the bottom plate horizontal connection embedded part is formed by welding an upper exposed steel plate, a lower exposed steel plate and an anchor rod, the upper exposed steel plate is welded with a bottom plate connecting steel plate arranged on the upper surface of the connecting position of the adjacent bottom plate, and the lower exposed steel plate is welded with a Y-shaped beam.

Further, a plurality of vertical ring truss ribs are arranged at intervals inside the three vertical ring of the prefabricated UHPC; and a plurality of bottom plate truss ribs are arranged on the surface of the prefabricated UHPC trisection bottom plate.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The prefabricated UHPC trisection bottom plate of the trisection bottom plate-trisection vertical ring combined concrete pile cap foundation is prefabricated and formed in advance, and can be attached with part of reinforcing steel bar engineering, the bottom plate template engineering, the bottom plate reinforcing steel bar engineering and the bottom plate concrete pouring and curing engineering are not existing on site, and only the installation engineering exists on the prefabricated UHPC trisection bottom plate. The prefabricated UHPC trisection bottom plates can be continuously provided with the prefabricated UHPC trisection vertical rings at the upper part of the prefabricated UHPC trisection bottom plates after being installed in place, the prefabricated UHPC trisection vertical rings and the prefabricated UHPC trisection bottom plates are prefabricated and formed on land, and are assembled into a whole by a land assembly plant transported to a marine wind power plant on land and then transported to the sea for hoisting, and the whole is used as a permanent dismantling-free template of a bearing platform core concrete project, so that the construction speed of the bearing platform can be remarkably accelerated without the need of a template dismantling project on site; meanwhile, the permanent template formed by the three-part bottom plate and the three-part vertical ring is free from being removed, the permanent template is directly formed into a part of the bearing platform, the engineering quantity of the internally cast-in-situ reinforced concrete is reduced, and the offshore construction time is reduced again. The ultra-high performance concrete permanent formwork is assembled to form a stable sleeve box structure, construction personnel can construct the inner part of the permanent formwork with high safety, the influence of complex sea conditions and climates on construction operation can be reduced, the construction efficiency is improved, and the construction difficulty is reduced.

(2) The main components of the three-part bottom plate-three-part vertical ring combined concrete bearing platform only comprise prefabricated UHPC three-part vertical rings, prefabricated UHPC three-part bottom plates and a few of corresponding connecting components, the cross section of the components is simple, the number of the components is small, the disassembly rate is low, the transportation requirement can be met, the assembly time can be greatly reduced, and the construction speed is increased.

(3) The prefabricated UHPC trisection vertical ring and the prefabricated UHPC trisection bottom plate are both made of ultra-high performance concrete, the ultra-high performance concrete has the characteristic of ultra-high strength (120-200 MPa), the UHPC permanent dismantling-free template is used as an offshore wind power bearing platform shell, the ultra-high performance concrete bottom plate and the vertical ring are used as part of a bearing platform structure, and the engineering amount of internal cast-in-situ reinforced concrete is reduced. Compared with the steel box, the method can further highlight the comprehensive economic benefit advantage to a certain extent.

(4) The prefabricated UHPC trisection vertical ring and the prefabricated UHPC trisection bottom plate are both made of ultra-high performance concrete, the ultra-high performance concrete has excellent durability, the UHPC permanent dismantling-free template is used as an offshore wind power bearing platform shell, the additional measure requirements of a tidal zone and a splash zone on concrete protection engineering can be reduced or eliminated, the bearing platform durability operation and maintenance measure requirements are remarkably reduced, and important guarantee is provided for greatly improving the durability of concrete structures of the tidal zone and the splash zone and prolonging the service life of bearing platform equipment.

(5) The utility model can realize the industrial design, production and assembly construction of the ultra-high performance concrete without the formwork, fully exert the assembly construction efficacy of the combined concrete project, is beneficial to the industrial development of the fixed offshore wind power project, and can improve the comprehensive economic benefit of the bearing platform.

Drawings

FIG. 1 is a schematic view of a base structure of a platform according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a bearing platform foundation structure without casting core reinforced concrete according to an embodiment of the present utility model;

FIG. 3 is a top view of a platform foundation structure without casting core reinforced concrete according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a vertical ring structure according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a bottom plate structure according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a prefabricated UHPC three-split vertical ring in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic diagram showing the construction of a three-part base plate assembled into a unitary base plate according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram II of a prefabricated UHPC trisection bottom plate structure according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of an embodiment of the present utility model in which a prefabricated UHPC trisection bottom plate and a prefabricated UHPC trisection bottom plate are assembled into an integral sleeve;

FIG. 10 is a schematic diagram of a connection node between adjacent bottom boards according to an embodiment of the present utility model;

FIG. 11 is a second schematic diagram of a connection node between adjacent bottom boards according to an embodiment of the present utility model;

FIG. 12 is a schematic diagram of a third connection node between adjacent bottom plates according to an embodiment of the present utility model;

FIG. 13 is a schematic view of a connection node between adjacent vertical rings according to an embodiment of the present utility model;

FIG. 14 is a schematic view of a connection node between a vertical ring and a base plate according to an embodiment of the present utility model;

FIG. 15 is a cross-sectional view of a pre-formed UHPC three-part backplane in accordance with an embodiment of the present utility model;

fig. 16 is a schematic view of a structure of a prefabricated UHPC trisection bottom plate and a steel pipe pile according to an embodiment of the present utility model;

fig. 17 is a schematic diagram of a connection structure between a steel pipe pile and a prefabricated UHPC trisection bottom plate according to an embodiment of the present utility model;

FIG. 18 is a schematic view of a Y-beam structure in accordance with an embodiment of the present utility model;

FIG. 19 is a schematic view of a circumferential embedded part structure according to an embodiment of the present utility model;

FIG. 20 is a schematic view of a structure of a horizontal connection embedded part of a bottom plate in an embodiment of the utility model;

FIG. 21 is a schematic view of a vertical connection embedded part structure of a bottom plate in an embodiment of the utility model;

FIG. 22 is a schematic view of a vertical ring L-shaped steel plate embedded part structure according to an embodiment of the utility model;

in the figure: 1-a core reinforced concrete layer; 1 a-steel beam; 2-prefabricating UHPC three-division vertical rings, 2 a-vertical ring L-shaped steel plate embedded parts, 2 b-trapezoid rib adding plates, 2 c-steel bar openings, 2 d-annular embedded parts, 2 e-vertical ring welded steel plates, 2 f-vertical ring key teeth, 2 g-vertical ring grooves and 2 h-vertical ring grooves; 3-prefabricating a UHPC trisection bottom plate, wherein the 3 a-bottom plate is vertically connected with the embedded part; 3 b-floor ring-protruding; the 3 c-bottom plate wedge-shaped key teeth, the 3 d-bottom plate wedge-shaped grooves, the 3 e-bottom plate connecting steel plates, the 3 f-bottom plate horizontally connecting embedded parts, the 3 g-column caps and the 3 h-reserved holes; 4-steel pipe piles; 5-steel support brackets; 6-steel foundation rings, 6 a-foundation ring embedded bolts and 6 b-foundation ring lug steel plates; 7-erecting ring truss ribs; 8-a bottom plate truss rib; 9-Y beam.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

Examples: as shown in fig. 1-22, a three-split bottom plate-three-split vertical ring combined concrete bearing platform foundation is provided, which comprises a prefabricated UHPC three-split vertical ring 2, a prefabricated UHPC three-split bottom plate 3 and a steel support platform which are sequentially arranged from top to bottom, wherein a combined bearing platform post-pouring concrete structure is arranged above the prefabricated UHPC three-split vertical ring, and a post-pouring interval is formed among the combined bearing platform post-pouring concrete structure, the prefabricated UHPC three-split vertical ring and the prefabricated UHPC three-split bottom plate; and reinforced concrete is poured in the post-pouring section.

In this embodiment, the post-pouring concrete structure of the combined bearing platform comprises a steel foundation ring 6 arranged in the middle of the prefabricated UHPC trisection bottom plate, a steel beam 1a is arranged between a steel support platform part penetrating through the prefabricated UHPC trisection bottom plate and the steel foundation ring, and a core reinforced concrete layer 1 is arranged in the post-pouring section.

The lower part of the steel foundation ring 6 is provided with a foundation ring lug steel plate 6b, and the foundation ring lug steel plate is connected with a prefabricated UHPC trisection bottom plate through a foundation ring embedded bolt 6 a.

The prefabricated UHPC trisection bottom plate and the prefabricated UHPC trisection vertical ring are both made of ultra-high-performance concrete, and the ultra-high-performance concrete has ultra-high strength (120-200 MPa).

In this embodiment, the steel support platform includes a plurality of steel pipe piles 4 and steel support brackets 5 provided on the outer sides of the upper portions of the steel pipe piles; the prefabricated UHPC trisection bottom plate is provided with a reserved hole 3h for penetrating the upper part of the steel pipe pile, and a column cap 3g is arranged below the reserved hole and is used for being supported on the steel support bracket.

The diameter of the reserved hole can be 1.25 times of the diameter of the steel pipe pile, so that the steel pipe pile can penetrate through the prefabricated UHPC trisection bottom plate and is connected with the steel foundation ring through the steel beam.

In the embodiment, a vertical ring L-shaped steel plate embedded part 2a is arranged at the lower part of a prefabricated UHPC trisection vertical ring, a plurality of trapezoid stiffening plates 2b for enhancing node rigidity are uniformly arranged at the inner side of the vertical ring L-shaped steel plate embedded part, and a steel bar opening 2c for penetrating a circumferential steel bar is reserved on each trapezoid stiffening plate; the circumferential reinforcement is used for pouring core reinforced concrete.

The prefabricated UHPC trisection vertical ring comprises three vertical ring bodies, wherein adjacent vertical ring bodies are connected through a vertical ring connecting structure, the front part and the rear part of the vertical ring connecting structure are provided with annular embedded parts 2d, and vertical ring welding steel plates 2e are arranged between the annular embedded parts of the adjacent vertical ring bodies.

The annular embedded part can comprise two steel plates and a plurality of pin shafts for connecting the two steel plates.

The annular embedded parts are respectively embedded at two side parts of the prefabricated UHPC trisection vertical rings, so that adjacent vertical ring bodies form connection nodes between the trisection vertical rings, and the connection nodes are welded by the vertical ring welding steel plates.

The vertical ring connecting structure comprises vertical ring key teeth 2f and vertical ring grooves 2g which are respectively arranged on two sides of the vertical ring body, wherein the vertical ring key teeth of one vertical ring body of the adjacent vertical ring bodies are matched with the vertical ring grooves of the other vertical ring body, so that the annular connection and waterproof structure between the three vertical rings of the prefabricated UHPC are formed.

In the embodiment, a bottom plate vertical connection embedded part 3a is arranged at the edge of the prefabricated UHPC trisection bottom plate, and the bottom plate vertical connection embedded part is welded with a vertical ring L-shaped steel plate embedded part; the edge part of the prefabricated UHPC trisection bottom plate is provided with a bottom plate ring protrusion 3b which is used for being matched with a vertical ring groove 2h arranged below the prefabricated UHPC trisection vertical ring.

In this embodiment, the bottom of the prefabricated UHPC trisection bottom plate is provided with a Y-beam 9, the prefabricated UHPC trisection bottom plate includes three bottom plates, adjacent bottom plates are connected by a bottom plate connecting structure, the bottom plate connecting structure includes a bottom plate wedge-shaped groove 3d and a bottom plate wedge-shaped key tooth 3c, and the bottom plate wedge-shaped groove of one of the adjacent bottom plates is matched with the wedge-shaped key tooth of the other bottom plate to form a horizontal splice seam and a waterproof structure between the prefabricated UHPC trisection bottom plates.

The bottom plate connection structure department is equipped with bottom plate horizontal connection built-in fitting 3f, and bottom plate horizontal connection built-in fitting is formed by upper and lower layer exposed steel sheet and stock welding, and the upper layer exposed steel sheet welds with the bottom plate connection steel sheet 3e that sets up in adjacent bottom plate junction upper surface, and lower layer exposed steel sheet welds with the Y-beam.

In the embodiment, a plurality of vertical ring truss ribs 7 are arranged at intervals inside the three vertical ring of the prefabricated UHPC; the surface of the prefabricated UHPC trisection bottom plate is provided with a plurality of bottom plate truss ribs 8 so as to be beneficial to the connection and shearing resistance of the prefabricated UHPC trisection bottom plate after the core reinforced concrete is poured and formed.

In the embodiment, the construction steps are as follows, the method for constructing the combined concrete bearing platform foundation comprises the following steps:

step one: and (3) conveying the assembled fittings of the prefabricated UHPC trisection vertical ring and the prefabricated UHPC trisection bottom plate to a land construction site close to the offshore wind farm.

Step two: a prefabricated UHPC three-way riser is assembled on land construction site (as shown in fig. 6).

Step three: a prefabricated UHPC trisection bottom plate (as shown in fig. 7) was assembled at the onshore construction site.

Step four: the assembled UHPC trisection bottom plate and the assembled UHPC trisection bottom plate are assembled into an integral UHPC sleeve structure (shown in figure 8) on the land construction site.

Step five: and pre-welding the steel support bracket on the surface of the pile body of the steel pipe pile.

Step six: and hoisting the assembled UHPC sleeve box structure to the steel support bracket, releasing the mounting and positioning mark on the support surface of the steel support bracket, and completing the mounting by adopting a method of mounting and measuring and adjusting.

Step seven: after the UHPC sleeve box structure is installed, filling the construction gap reserved between the reserved hole and the steel pipe pile with high-strength concrete grouting material, and fixing the UHPC trisection bottom plate of the UHPC sleeve box structure and the steel pipe pile;

step eight: connecting a steel foundation ring with the UHPC trisection bottom plate through foundation ring embedded bolts;

step eight: installing a steel structure beam at the top end of the steel pipe pile, and connecting the steel structure beam with a steel foundation ring;

step nine: and pouring core reinforced concrete in the post-pouring section to connect the prefabricated UHPC trisection vertical ring, the prefabricated UHPC trisection bottom plate, the steel pipe pile and the steel foundation ring into a whole.

Any of the above-described embodiments of the present utility model disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the utility model, and the numerical values listed above should not limit the protection scope of the utility model.

If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is used merely to facilitate distinguishing between components and not otherwise stated, and does not have a special meaning.

Meanwhile, if the above utility model discloses or relates to parts or structural members fixedly connected with each other, the fixed connection may be understood as follows unless otherwise stated: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).

In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.

Any part provided by the utility model can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.

Claims (10)

1. The utility model provides a three divide bottom plate-three divide vertical ring combination concrete cushion cap basis, its characterized in that, including the prefabricated UHPC three divide vertical ring that from top to bottom set gradually, prefabricated UHPC three divide bottom plate and steel supporting platform, prefabricated UHPC three divide vertical ring top is equipped with the combination cushion cap post-cast concrete structure, and the combination cushion cap post-cast concrete structure, prefabricated UHPC three divide vertical ring, prefabricated UHPC three divide between the bottom plate to form post-cast interval.

2. The concrete cap foundation of claim 1, wherein the steel support platform comprises steel pipe piles and steel support brackets arranged on the outer sides of the upper parts of the steel pipe piles.

3. The concrete cap foundation of the three-split bottom plate-three-split vertical ring combination according to claim 1, wherein a vertical ring L-shaped steel plate embedded part is arranged at the lower part of the prefabricated UHPC three-split vertical ring, a plurality of trapezoid stiffening plates for enhancing the rigidity of the node are uniformly arranged on the inner side of the vertical ring L-shaped steel plate embedded part, and a steel bar opening for penetrating a steel bar in a circumferential direction is reserved on each trapezoid stiffening plate.

4. The concrete cap foundation of claim 3, wherein the prefabricated UHPC three-split vertical ring comprises a plurality of vertical ring bodies, the adjacent vertical ring bodies are connected through a vertical ring connecting structure, annular embedded parts are arranged at the front and rear sides of the vertical ring connecting structure, and vertical ring welding steel plates are arranged between the annular embedded parts of the adjacent vertical ring bodies; the vertical ring connecting structure comprises vertical ring key teeth and vertical ring grooves which are respectively arranged on two sides of the vertical ring body, and the vertical ring key teeth of one vertical ring body of the adjacent vertical ring bodies are matched with the vertical ring grooves of the other vertical ring body.

5. The three-split bottom plate-three-split vertical ring combined concrete bearing platform foundation according to claim 3, wherein a bottom plate vertical connection embedded part is arranged at the edge of the prefabricated UHPC three-split bottom plate, and the bottom plate vertical connection embedded part is welded with a vertical ring L-shaped steel plate embedded part; the edge part of the prefabricated UHPC trisection bottom plate is provided with a bottom plate annular bulge which is used for being matched with a vertical ring groove arranged below the prefabricated UHPC trisection vertical ring.

6. The three-split bottom plate-three-split vertical ring combined concrete pile cap foundation according to claim 1, wherein a Y-shaped beam is arranged at the bottom of the prefabricated UHPC three-split bottom plate; the prefabricated UHPC trisection bottom plate comprises a plurality of bottom plates, adjacent bottom plates are connected through a bottom plate connecting structure, the bottom plate connecting structure comprises bottom plate wedge-shaped grooves and bottom plate wedge-shaped key teeth, and the bottom plate wedge-shaped grooves of one bottom plate of the adjacent bottom plates are matched with the wedge-shaped key teeth of the other bottom plate; the bottom plate connecting structure is provided with a bottom plate horizontal connection embedded part, the bottom plate horizontal connection embedded part is formed by welding an upper exposed steel plate, a lower exposed steel plate and an anchor rod, the upper exposed steel plate is welded with a bottom plate connecting steel plate arranged on the upper surface of the connecting position of the adjacent bottom plate, and the lower exposed steel plate is welded with a Y-shaped beam.

7. The three-split bottom plate-three-split vertical ring combined concrete pile cap foundation according to claim 1, wherein the combined pile cap post-cast concrete structure comprises a steel foundation ring arranged in the middle of the prefabricated UHPC three-split bottom plate, a steel beam is arranged between a steel supporting platform part penetrating through the prefabricated UHPC three-split bottom plate and the steel foundation ring, and a core reinforced concrete layer is arranged in the post-cast region.

8. The concrete cap foundation of claim 2, wherein the prefabricated UHPC concrete foundation comprises a reserved hole for the upper portion of the steel pipe pile to penetrate through, and a cap is arranged below the reserved hole and is used for being supported on the steel support bracket.

9. The concrete cap foundation of claim 7, wherein the steel foundation ring is provided with a foundation ring ear steel plate at the lower part, and the foundation ring ear steel plate is connected with the prefabricated UHPC foundation plate through foundation ring embedded bolts.

10. The three-split bottom plate-three-split vertical ring combined concrete pile cap foundation according to claim 1, wherein a plurality of vertical ring truss ribs are arranged at intervals inside the prefabricated UHPC three-split vertical ring; and a plurality of bottom plate truss ribs are arranged on the surface of the prefabricated UHPC trisection bottom plate.

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