CN115977137B - Assembled foundation applicable to mountain fan lattice tower and assembling method thereof - Google Patents

Abstract

The invention relates to an assembled foundation suitable for a mountain fan lattice type tower and an assembling method thereof, wherein the assembled foundation comprises a central connecting steel ring and a plurality of central prefabricated parts which encircle the periphery of the central connecting steel ring, the end faces of the central prefabricated parts are not closed and are in a notch shape after being spliced, rib beam prefabricated parts which can move up and down relative to the central prefabricated parts are spliced in notches formed by adjacent central prefabricated parts, each rib beam prefabricated part comprises a connecting beam and a tower fixing seat which is integrally formed and installed at the free end of the connecting beam, the middle part of the tower fixing seat is fixedly provided with the tower connecting steel ring, a plurality of tower leveling rings which are matched with the tower fixing seat are sleeved outside the tower connecting steel ring, and a plurality of through holes which are convenient for inserting anchor rods are formed in the tower leveling rings and the corresponding tower fixing seats; the problem that the existing extended foundation commonly used for mountain wind power is large in occupied area, large in excavation amount and inconvenient to construct, has high requirements on stability of hillsides, and the lower foundation cannot flexibly cope with terrain restriction such as gradient is solved.

Description

Assembled foundation and assembly method for lattice tower of mountain wind turbine

Technical Field

The invention belongs to the technical field of wind power foundation structure design and construction, and relates to an assembled foundation suitable for a mountain wind turbine lattice tower and an assembly method thereof.

Background technique

Wind power generation converts the kinetic energy of wind into mechanical energy, and then converts mechanical energy into electrical energy. The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then increase the rotation speed through a speed increaser to drive the generator to generate electricity. Using wind power to generate electricity is very environmentally friendly and has huge wind energy reserves. To ensure the sustainable development of wind power generation, the wind turbine foundation used to install and fix the wind turbine tower is the key.

The device required for wind power generation is called a wind turbine. The wind turbine tower is the main supporting component of the wind turbine. Its design reliability is the guarantee for the safe operation of the wind turbine. At present, the structural forms of wind power towers mainly include single-cylinder towers, lattice towers, and hybrid towers with a single-cylinder tower on the upper part and a lattice tower on the lower part. The latter two types of towers are smaller in mass, more convenient to transport, and more suitable for mountainous wind farms.

The wind in mountainous areas is huge, but the distribution of wind resources varies greatly, and the locations of wind towers are scattered. Therefore, when constructing wind farms in mountainous environments, it is necessary to consider the strong site adaptability of mountain wind power foundations and to be able to flexibly adjust according to terrain factors such as slope gradient and geological conditions. In addition, most mountains are rock foundations with good bearing capacity, but on-site construction is inconvenient in mountainous areas. Excessive soil excavation will affect the stability of the slopes, and the large amount of excavated soil will accumulate and damage the mountain environment. Therefore, a foundation form with a smaller volume and an assembled structure can be considered. Therefore, an assembled foundation of an assembled mountain wind turbine lattice tower with strong site adaptability is required.

Summary of the invention

In view of this, the present invention provides an assembled foundation and assembly method for a mountain wind turbine lattice tower in order to solve the problem that the existing wind power tower cannot be flexibly adjusted according to terrain factors such as mountain slope when installed in mountains, the excavation volume is large and it is inconvenient for on-site construction.

In order to achieve the above object, the present invention provides the following technical solutions:

A prefabricated foundation suitable for a lattice tower of a mountain wind turbine comprises a central connecting steel ring and a plurality of central prefabricated components surrounding the circumference of the central connecting steel ring. After the central prefabricated components are spliced, the end faces are not closed and are in the shape of a slot. Rib beam prefabricated components that can move up and down relative to the central prefabricated components are inserted into the slots formed after adjacent central prefabricated components are spliced. The rib beam prefabricated components comprise a connecting beam and a tower fixing seat integrally formed and installed at the free end of the connecting beam. A tower connecting steel ring is fixedly installed in the middle of the tower fixing seat. A plurality of tower leveling rings that are compatible with the tower fixing seat are connected to the outer surface of the tower connecting steel ring. A plurality of through holes for inserting anchor rods are provided on the tower leveling ring and the corresponding tower fixing seat.

The beneficial effect of this foundation solution is that the four steel pipe legs of the upper lattice tower are respectively fixedly connected to the upper flanges of the four tower connecting steel rings by bolts, and the anchor rods facilitate anchoring the entire assembled foundation into the rock layer on the lower side of the foundation.

Furthermore, the end face of the central connecting steel ring is square, and the central prefabricated component consists of four pieces.

Furthermore, each central prefabricated component includes a cube-shaped base and an L-shaped corner column fixedly mounted on the base, and the corner of the corner column is rounded. Beneficial effect: The rounded angle can reduce the excavation volume to a certain extent, increase the contact area with the surrounding soil, and protect the construction personnel.

Furthermore, preset holes are opened on four sides of the central connecting steel ring. Beneficial effect: the prestressed tendons penetrating the rib beam prefabricated components are anchored inside the preset holes, and an operating space for tensioning and anchoring is provided, thereby improving the installation stability of the rib beam prefabricated components.

Furthermore, the tower fixing seat is disc-shaped and has two-step concave platforms inwardly arranged, the tower connecting steel ring is columnar, and the tower leveling ring is arranged on the first step concave platform of the two-step concave platforms in the tower fixing seat.

Furthermore, the transverse reinforcement embedded in the corner column extends out of the two longitudinal end faces of the corner column. After the height of the connecting beam is determined, the transverse reinforcement extending outward from the corner column is connected by overlapping steel bars. The steel bars embedded in the connecting beam along the horizontal direction extend out of the longitudinal end face of the connecting beam and overlap with the steel bars welded and overlapped with the corner column. Beneficial effect: The steel bars extending out of the connecting beam are cross-lapped with the overlapping corner column steel bars to achieve reliability of the connection area.

Furthermore, mutually penetrating connecting bars and annular reinforcements are overlapped and placed in the relative corner columns, the vertical embedded reinforcements at the bottom of the central prefabricated component are extended, and a reinforcement frame is formed in the cavity area between the central connecting steel ring and the corner column.

An assembled foundation for a mountain wind turbine lattice tower comprises the following steps:

S1. Preliminarily adjust the relative position of the notch between the rib beam prefabricated component and the corresponding central prefabricated component according to the position of the hillside line, excavate the area where the central prefabricated component and the prefabricated rib beam component are placed, drill holes at the corresponding positions where the anchor rods are inserted, and then anchor the anchor rods.

S2. Connection between the central prefabricated component and the corresponding rib beam prefabricated component

After excavating the earthwork area where the central prefabricated components are placed, a plain concrete cushion is poured in the earthwork area, and then the central prefabricated components are placed in the marked position and fit each other. The soil at the connecting beam of the rib beam prefabricated components is excavated to a depth designed according to the slope of the hillside. After excavation, the connecting beam is placed in the corresponding area, and the transverse reinforcements extending outward from the relative corner columns are connected by welding with overlapping steel bars. The steel bars extending outward from the ends of the connecting beams and the steel bars welded and overlapped by the corner columns are staggered and overlapped with each other to improve the connection stability between the connecting beams and the corresponding corner columns;

S3. Connection between the central prefabricated component and the central connecting steel ring

The square steel plate at the bottom of the central connecting steel ring is fixed to the embedded supporting connector of the central prefabricated components after being spliced together by bolt connection at the predetermined position, the vertical embedded steel bars at the bottom of the central prefabricated components are extended, and the steel bars are passed through the reserved holes of the connecting beams, and the two sides of the anchors are fixed to the fastening ends of the inner side of the central connecting steel ring and the inner side of the tower fixing seat after the prestressing is tensioned; after the connecting beam and the central connecting steel ring are connected, the connecting bars and the annular steel bars that penetrate each other are overlapped and placed in the relative corner columns, and a steel bar frame is formed in the cavity area between the central connecting steel ring and the corner columns;

S4, tower fixing seat, tower connecting steel ring and tower leveling ring are connected

According to the slope of the hillside and the buried depth of the tower fixing base, the height of the tower connection steel ring and the number of tower leveling rings are designed, so that the tower connection steel ring in the tower fixing base and the stacked tower leveling section are close to the slope surface, and the upper flange of the tower connection steel ring is slightly higher than the upper surface of the stacked multi-section tower leveling rings, and the gap is used for bolt connection with the tower steel pipe;

S5. After all nodes of the central prefabricated component and the corresponding rib beam prefabricated component, the central prefabricated component and the central connecting steel ring and the tower fixing seat, the tower connecting steel ring and the tower leveling ring are connected, concrete is poured at the connection points of the central prefabricated component, the rib beam prefabricated component and the central connecting steel ring steel bars, so that the central prefabricated component, the rib beam prefabricated component and the central connecting steel ring steel bars are connected as a whole. After the tower fixing seat concave platform and the tower leveling ring are tensioned and fixed by prestressed anchor rods, concrete is poured in the cavity formed by the tower fixing seat, the tower connecting steel ring and the tower leveling ring, wherein the tower connecting steel ring and the tower leveling ring are poured until they are flush with the upper surface of the stacked tower leveling rings. After the post-cast concrete curing is completed, the excavated foundation pit is backfilled;

S6. The four steel pipe legs of the upper lattice tower are respectively fixedly connected to the upper flanges of the four tower connecting steel rings by bolts, and the gap between the upper flange of the tower connecting steel ring and the upper horizontal surface of the tower leveling ring is filled with high-strength grouting material.

Furthermore, in step S3, in order to facilitate the tensioning and fixing of the prestressed tendons extending outward from the coupling beam and the preset holes on the central connecting steel ring, the prestressed tendons of the coupling beam can be bent according to actual conditions to correspond to the holes on the central connecting steel ring.

Furthermore, in step S4, the number of tower leveling rings is adjusted and arranged according to the actual burial depth, and the number of tower leveling rings may be one or more.

The beneficial effects of the present invention are:

1. The assembled foundation suitable for the lattice tower of a mountain wind turbine disclosed in the present invention has a plane formed by a central connecting steel ring and a central prefabricated component, which is convenient for fixed connection with the central column of the steel tower tube in the upper lattice duct tower, and the rib beam prefabricated component can move up and down relative to the central prefabricated component, so that the tower fixing seat at the end of the rib beam prefabricated component can adapt to the slopes of different hillsides, and the tower connecting steel ring is convenient for fixed connection with the steel pipe support leg of the upper lattice tower, and the anchor rod can anchor the entire assembled foundation into the rock layer on the lower side of the foundation; this assembled foundation structure is fixed with anchor rods, which can reduce the amount of excavation or most of the soil can be backfilled after excavation, the foundation occupies a small area, and the construction period is shortened; the upper part of the assembled foundation structure can be equipped with a lattice tower or a hybrid tower with a lattice lower part and a steel bar or concrete tower tube on the upper part.

2. The assembled foundation for the lattice tower of a mountain wind turbine disclosed in the present invention can suspend the tower and make the legs at the bottom of the tower at the same horizontal plane. It can better adapt to the terrain changes on the slopes of mountainous areas, greatly reduce the volume of foundation concrete, and reduce the volume of excavation and filling of the wind turbine hoisting platform.

Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG1 is a schematic diagram of the structure of a lattice tower for a mountain wind turbine after pouring concrete;

FIG2 is a schematic diagram of the structure of the central prefabricated component of FIG1 of the present invention after the central connecting steel ring is installed in the middle;

FIG3 is a schematic diagram of the structure of the central prefabricated component of FIG2 of the present invention after rib beam prefabricated components and anchor rods are installed around the central prefabricated component;

FIG4 is a schematic diagram of the structure after the connecting bars and the annular steel bars are installed between the central prefabricated components of FIG3 of the present invention;

FIG5 is a top view of FIG4 of the present invention;

FIG6 is a schematic structural diagram of the present invention after the tower connecting steel ring and the tower leveling ring are installed on the rib beam prefabricated component of FIG4;

FIG7 is a schematic diagram of the central connection steel ring structure of FIG6 of the present invention;

FIG8 is a schematic diagram of the structure of the central prefabricated component of FIG6 of the present invention;

FIG9 is a schematic diagram of the structure of the rib beam prefabricated component of FIG6 of the present invention;

FIG10 is a schematic diagram of the tower structure connected to the steel ring of FIG6 according to the present invention;

FIG11 is a schematic diagram of the structure of the tower leveling ring of FIG6 of the present invention;

FIG12 is a schematic structural diagram of a mountain wind turbine lattice tower in which an assembled foundation is installed at the bottom of the lattice tower according to the present invention;

13 is a schematic structural diagram of the assembled foundation of the mountain wind turbine lattice tower of the present invention installed at the bottom of the hybrid tower.

Figure numerals: central prefabricated component 1, base 11, corner column 12, connecting rib 13, annular steel bar 14, vertical embedded steel bar 15, embedded support connector 16, central connecting steel ring 2, preset hole 21, rib beam prefabricated component 3, connecting beam 31, tower fixing seat 32, tower connecting steel ring 33, tower leveling ring 34, anchor rod 4, concrete 5.

Detailed ways

The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

The assembled foundation suitable for the lattice tower of a mountain wind turbine as shown in Figures 1 to 11 includes a central connecting steel ring 2 with a square end face and four central prefabricated components 1 surrounding the central connecting steel ring 2. According to the number of lattice tower legs that need to be fixed on the assembled foundation, the central connecting steel ring 2 can be designed to be a triangle or a polygon, and the central prefabricated component 1 can be adapted thereto. This embodiment takes a lattice steel pipe tower with four legs as an example.

A square steel plate with bolt holes all around the bottom of the central connecting steel ring 2 is welded, and an L-shaped embedded supporting connector 16 with bolt holes is welded on the central prefabricated component 1. After the four central prefabricated components 1 are spliced together, the four L-shaped embedded supporting connectors 16 are spliced into a square embedded supporting connector 16 that matches the square steel plate at the bottom of the central connecting steel ring 2. The square steel plate at the bottom of the central connecting steel ring 2 is fixed to the embedded supporting connector 16 of the spliced central prefabricated components 1 at a predetermined position by bolt connection.

After the central prefabricated components 1 are spliced, the four sides are not closed and are notched. Each central prefabricated component 1 includes a cube-shaped base 11 and an L-shaped corner column 12 fixedly mounted on the base 11. The corners of the corner column 12 are rounded. The transverse reinforcement embedded in the corner column 12 extends out of the two longitudinal end faces of the corner column 12. The corner column 12 is stacked and staggered with connecting bars 13 and annular steel bars 14 that penetrate each other.

Preset holes 21 are opened on the four sides of the central connecting steel ring 2, and the preset holes 21 are convenient for tensioning and anchoring the prestressed tendons in the connecting beam 31 of the rib beam prefabricated component 3 on the inner side of the central connecting steel ring 2, thereby improving the installation stability of the rib beam prefabricated component 3.

The rib beam prefabricated component 3 that can move up and down relative to the central prefabricated component 1 is inserted into the groove formed after the adjacent central prefabricated components 1 are spliced. The rib beam prefabricated component 3 includes a connecting beam 31 and a tower fixing seat 32 integrally formed and installed at the free end of the connecting beam 31. The horizontally embedded transverse reinforcement of the connecting beam 31 extends out of the longitudinal end face of the connecting beam 31 and is staggered and overlapped with the transverse reinforcement welded and connected in the corresponding corner column 12. The tower fixing seat 32 is disc-shaped and has two steps of concave platforms inwardly arranged. A columnar tower connecting steel ring 33 is fixedly installed in the middle of the tower fixing seat 32. The upper and lower end faces of the tower connecting steel ring 33 are welded with protruding annular flanges. The flanges are connected and fixed to the inner side of the concave platform of the tower fixing seat 32 through the embedded threaded steel bars on the inner side of the concave platform. Bolt holes for connection corresponding to the lattice steel pipe tower are opened on the upper end face flange of the tower connecting steel ring 33. Shear keys are fixedly installed on the outer wall of the tower connecting steel ring 33.

The tower connecting steel ring 33 is outer-connected with a plurality of tower leveling rings 34 adapted to the first-step recess of the two-step recess in the tower fixing seat 32. The tower leveling ring 34 and the corresponding recess of the tower fixing seat 32 are provided with a plurality of through holes for inserting anchor rods 4. By applying prestress to the anchor rods 4, the upper part of the anchor rods 4 is fixed to the upper surface of the tower leveling ring 34 after the washers are fitted, so as to connect the multi-section tower leveling rings 34 and the tower fixing seat 32, and the foundation is anchored and connected to the lower rock through the anchor rods 4.

FIG. 2 to FIG. 6 are assembly flow charts of the assembled foundation suitable for the mountain wind turbine lattice tower, and the assembly process includes the following steps:

S1. Preliminarily adjust the relative position of the notch between the rib beam prefabricated component 3 and the corresponding central prefabricated component 1 according to the position of the hillside line, excavate the area where the central prefabricated component 1 and the prefabricated rib beam component are placed, drill holes at the corresponding positions where the anchor rods 4 are inserted, and then anchor the anchor rods 4.

S2, the central prefabricated component 1 is connected with the corresponding rib beam prefabricated component 3

After excavating the earthwork area where the central prefabricated component 1 is placed, a plain concrete cushion is poured in the earthwork area, and then the central prefabricated component 1 is placed in the marked position and fits each other. The soil at the connecting beam 31 of the rib beam prefabricated component 3 is excavated to a depth designed according to the slope of the hillside. After excavation, the connecting beam 31 is placed in the corresponding area, and the transverse reinforcements extending outward from the relative corner column 12 are connected by welding with overlapping steel bars. The transverse reinforcements extending outward from the ends of the connecting beam 31 are staggered and overlapped with the steel bars after welding and overlapping the corner column 12, so as to improve the connection stability between the connecting beam 31 and the corresponding corner column 12;

S3, the central prefabricated component 1 is connected to the central connecting steel ring 2

The square steel plate at the bottom of the central connecting steel ring 2 is fixed to the embedded supporting connector 16 of the central prefabricated component 1 after being spliced together by bolt connection according to the predetermined position, and the vertical embedded steel bars 15 at the bottom of the central prefabricated component 1 are extended, and the steel bars are passed through the reserved holes of the connecting beam 31, and the two sides of the anchor are fixed to the fastening ends of the inner side of the central connecting steel ring 2 and the inner side of the tower fixing seat 32 after the prestressing is tensioned; after the connecting beam 31 is connected to the central connecting steel ring 2, the connecting bars 13 and the annular steel bars 14 that penetrate each other are overlapped and placed in the relative corner columns 12, and a steel bar frame is formed in the cavity area between the central connecting steel ring 2 and the corner column 12;

S4, tower fixing seat 32, tower connecting steel ring 33 and tower leveling ring 34 are connected

According to the slope of the hillside and the buried depth of the tower fixing seat 32, the height of the tower connecting steel ring 33 and the number of the tower leveling rings 34 are designed, so that the tower connecting steel ring 33 in the tower fixing seat 32 and the stacked tower leveling sections are close to the slope surface, and the upper flange of the tower connecting steel ring 33 is slightly higher than the upper surface of the stacked multi-section tower leveling rings 34, and the gap left is used for bolt connection with the tower steel pipe;

S5. After all nodes of the central prefabricated component 1 and the corresponding rib beam prefabricated component 3, the central prefabricated component 1 and the central connecting steel ring 2 and the tower fixing seat 32, the tower connecting steel ring 33 and the tower leveling ring 34 are connected, concrete is poured at the steel bar connection points of the central prefabricated component 1, the rib beam prefabricated component 3 and the central connecting steel ring 2, so that the central prefabricated component 1, the rib beam prefabricated component 3 and the central connecting steel ring 2 are connected as a whole. After the concave platform of the tower fixing seat 32 and the tower leveling ring 34 are tensioned and fixed by the prestressed anchor rod 4, concrete is poured in the cavity formed by the tower fixing seat 32, the tower connecting steel ring 33 and the tower leveling ring 34, wherein the tower connecting steel ring 33 and the tower leveling ring 34 are poured until they are flush with the upper surface of the stacked tower leveling rings 34. After the post-cast concrete 5 is cured, the excavated foundation pit is backfilled;

S6. The four steel pipe legs of the upper lattice tower are respectively fixedly connected to the upper flanges of the four tower connecting steel rings 33 by bolts, and the gap between the upper flange of the tower connecting steel ring 33 and the upper horizontal surface of the tower leveling ring 34 is filled with high-strength grouting material.

Figure 12 is a schematic diagram of the structure of the assembled foundation of the mountain wind turbine lattice tower installed at the bottom of the lattice tower; Figure 13 is a schematic diagram of the structure of the assembled foundation of the mountain wind turbine lattice tower installed at the bottom of the hybrid tower. These two tower forms have a small mass and are more convenient to transport. When combined with the assembled foundation, they are more suitable for mountain wind farms.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims (10)

1. The utility model provides an assembled basis suitable for mountain region fan lattice formula pylon, a serial communication port, including the center connection steel ring and encircle a plurality of center prefabricated component at center connection steel ring week side, each terminal surface is not closed and is the notch form after the center prefabricated component concatenation, peg graft in the notch that adjacent center prefabricated component spliced back formed have can relative center prefabricated component reciprocate, rib beam prefabricated component is including linking roof beam and integrated into one piece installs the pylon fixing base at linking the roof beam free end, pylon fixing base middle part fixed mounting has the pylon to connect the steel ring, the pylon is connected the steel ring and is cup jointed a plurality of pylon leveling rings with pylon fixing base looks adaptation outward, a plurality of through-holes of being convenient for insert the stock have been seted up on pylon leveling ring and the corresponding pylon fixing base.

2. The assembled foundation for the mountain blower lattice tower, as claimed in claim 1, wherein the end face of the central connecting steel ring is square, the number of the central prefabricated parts is four, and the central prefabricated parts are welded with pre-buried support connecting parts provided with bolt holes.

3. The assembled foundation for a mountain blower lattice tower of claim 2, wherein each central prefabricated member comprises a square base and an L-shaped corner post fixedly mounted on the upper end surface of the base, and the corners of the corner posts are rounded.

4. The assembled foundation for a mountain blower lattice tower of claim 3, wherein the central connection steel ring is provided with preset holes on four sides.

5. The assembled foundation of claim 4, wherein the tower fixing base is disc-shaped and is internally provided with two-stage concave tables, the tower connecting steel ring is columnar, and the tower leveling ring is arranged on a first stage concave table of the two-stage concave tables in the tower fixing base.

6. The assembled foundation for the mountain blower lattice tower, as set forth in claim 5, wherein the pre-buried transverse bars in the corner posts extend out of the two longitudinal end surfaces of the corner posts, after the height of the connecting beam is determined, the transverse bars extending out of the opposite corner posts are connected by welding the lap joint bars, and the connecting beam is overlapped with the welded lap joint reinforcing bars of the corner posts after extending out of the longitudinal end surfaces of the connecting beam along the horizontal direction.

7. The assembled foundation for a mountain blower lattice tower of claim 6, further comprising circumferential rebar, wherein the connecting tendons in the opposite corner posts overlap the circumferential rebar in a staggered manner to form a center area rebar framework.

8. A method of assembling a fabricated foundation adapted for a mountain blower lattice tower as claimed in claim 7, comprising the steps of:

S1, preliminarily adjusting the relative positions of the notches between the rib beam prefabricated parts and the corresponding central prefabricated parts according to the positions of hillside lines, excavating areas where the central prefabricated parts and the prefabricated rib beam prefabricated parts are placed, drilling corresponding positions where the anchor rods are inserted, and then anchoring the anchor rods;

s2, connecting the central prefabricated part with the corresponding rib beam prefabricated part

Pouring plain concrete cushion layers in the earthwork area after the earthwork area where the central prefabricated part is placed is excavated, then placing the central prefabricated part in a calibrated position, mutually attaching, designing the excavation depth of soil at the connecting beam in the rib beam prefabricated part according to the slope of a hillside, placing the connecting beam in a corresponding area after excavation, connecting transverse ribs extending out of opposite corner columns after welding by lap joint reinforcing steel bars, and mutually and alternately lapping the reinforcing steel bars extending out of the end parts of the connecting beam and the reinforcing steel bars welded and lapped by the corner columns, thereby improving the connection stability of the connecting beam and the corresponding corner columns;

s3, connecting the central prefabricated part with a central connecting steel ring

Fixing a square steel plate at the middle bottom of a central connecting steel ring on a pre-buried support connecting piece of a central prefabricated part after mutual splicing in a bolt connection mode according to a preset position, extending vertical pre-buried steel bars at the bottom of the central prefabricated part, penetrating the steel bars in reserved holes of a connecting beam, and fixing two sides of an anchor at the inner side of the central connecting steel ring and the fastening end of the inner side of a tower fixing seat after tensioning prestressing; after the connection of the connecting beam and the central connecting steel ring is completed, overlapping and placing connecting ribs and annular reinforcing steel bars which mutually penetrate in opposite corner posts, and forming a reinforcing steel bar frame in a cavity area between the central connecting steel ring and the corner posts;

s4, connecting the tower fixing seat, the tower connecting steel ring and the tower leveling ring

According to the slope of the hillside and the burial depth of the pylon fixing seat, the height of the pylon connecting steel ring is designed, the number of pylon leveling rings is selected, so that the pylon connecting steel ring in the pylon fixing seat and the piled pylon leveling sections are close to the surface of the hillside, the upper flange of the pylon connecting steel ring is slightly higher than the upper surface of the piled multi-section pylon leveling rings, and a gap is reserved for being connected with a pylon steel pipe through bolts;

S5, pouring concrete at the joints of the central prefabricated part, the rib beam prefabricated part and the steel bars of the central connecting steel ring after the central prefabricated part is connected with the corresponding rib beam prefabricated part, the central prefabricated part is connected with the central connecting steel ring and the tower fixing seat, and the tower connecting steel ring is connected with the tower leveling ring, so that the central prefabricated part, the rib beam prefabricated part and the steel bars of the central connecting steel ring are connected into a whole, pouring concrete in a cavity formed by the tower fixing seat, the tower connecting steel ring and the tower leveling ring after the tower fixing seat and the tower leveling ring are tensioned and fixed through the prestressed anchor rods, pouring the tower connecting steel ring and the tower leveling ring until the tower connecting steel ring and the tower leveling ring are flush with the upper surface of the stacked tower leveling ring, and backfilling an excavated foundation pit after the later maintenance of the poured concrete is completed;

S6, fixedly connecting four steel pipe supporting legs of the upper lattice type tower with upper flanges of four tower connecting steel rings through bolts respectively, and filling high-strength grouting material in gaps between the upper flanges of the tower connecting steel rings and the upper horizontal surfaces of the tower leveling rings.

9. The assembling method for assembled foundation of mountain blower lattice tower as claimed in claim 8, wherein step S3 is to fix the prestressed tendons of the connecting beam with the preset Kong Zhangla on the central connection steel ring in order to facilitate the connection Liang Waishen, the prestressed tendons of the connecting beam can be bent to correspond to the holes on the central connection steel ring according to actual conditions.

10. The method for assembling the assembled foundation applicable to the mountain blower lattice towers of claim 8, wherein in step S4, the number of the tower leveling rings is one or more according to the actual burial depth adjustment arrangement.