Assembly type beam-slab structure fan foundation

Abstract

The utility model provides an assembly type beam-slab structure fan foundation, middle piers in the foundation are formed by splicing a plurality of fan-shaped middle piers, anchor bolt mounting holes and upper and lower anchor plate clamping grooves are reserved, an anchor bolt cage is convenient to mount, the middle piers are fixed through opposite-pulling anchor rods and hoops at the upper and lower ends of the middle piers, and an effective whole is formed. The fan-shaped middle piers and the T-shaped beam plates are connected through anchor bolt cages in the vertical direction and connected through opposite-pulling anchor rods between the T-shaped beams in the horizontal direction to form resultant force, the bearing capacity of the middle piers is improved, all the T-shaped beam plates form a whole through connecting plates, the connecting plates and the T-shaped beam plates are reinforced through vertical embedded bolts and horizontal mortise and tenon joint connecting keys, and the bearing capacity of the middle piers is improved. And the overall stress form is more coordinated and stable. The foundation structure is reasonable in stress, convenient to install and low in cost, construction quality is guaranteed, the construction period is greatly shortened, and the foundation structure has wide engineering application prospects.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan foundations and relates to an assembled beam-slab structure fan foundation and a construction method thereof. Background Art

[0002] Compared with new energy sources such as nuclear energy, solar energy, tidal energy, and biomass energy, wind energy has a large storage capacity and is inexhaustible. In addition, wind energy development technology is relatively mature, has high economic feasibility, and is easier to commercialize.

[0003] As the bearing member of the entire wind turbine structure, the foundation of the wind turbine generator set usually bears repeated loads in 360° directions and has large eccentric force characteristics. The commonly used onshore wind turbine foundations in China today are still the traditional extended foundation, pile foundation, rock anchor foundation, beam-slab foundation, sunken cylinder tension-free foundation, and pier foundation. At present, the most commonly used wind turbine foundations are beam-slab foundation and extended foundation. The extended foundation has high rigidity, simple structure, and convenient construction, but it has low efficiency in resisting bending moments and high cost. After optimization, the extended foundation is obtained as a beam-slab foundation, which has low cost, reasonable force, and high bending efficiency, but it has complex structure, more processes, and difficult to control construction quality. In recent years, with the increase in mountain wind power projects at home and abroad, some projects cannot use commercial concrete due to transportation conditions, and the concrete mixed on site is affected by many factors and it is difficult to guarantee the quality; some projects are affected by mountain construction conditions, and there are interruptions during the pouring of wind turbine foundation concrete. For such projects, the use of traditional foundation forms will not only pose challenges to the transportation of concrete, but will also bring considerable difficulties to the quality of project construction, thus affecting the progress of the project.

[0004] Based on the current application status of wind power foundations, it is imperative to develop new foundation forms that are suitable for complex mountain conditions and meet the requirements of long-distance transportation and sustainable development. Utility Model Content

[0005] The utility model aims to design an assembled beam-slab structure wind turbine foundation to solve the problems of complex structure, multiple processes, long construction period, difficult to control construction quality, and difficult long-distance transportation in the current wind power foundation applications mentioned in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: an assembled beam-slab structure wind turbine foundation, comprising a fan-shaped middle pier, a T-shaped beam plate, and a connecting plate; the fan-shaped middle pier is a fan-ring column component with a certain central angle, and a plurality of fan-shaped middle piers are spliced ​​in pairs to form a hollow cylindrical middle pier, and are fixed by a top hoop and a bottom hoop;

[0007] The T-shaped beam plate comprises a fan-shaped bottom plate with a certain central angle, a beam, and a beam side arm. The edges of both sides of the large diameter end of the bottom plate are provided with a first groove-shaped connecting portion. The beam is arranged on the bottom plate to form an inverted "T" shape as a whole. The beam side arm is arranged at one end of the beam, and its curvature is consistent with the outer arc surface of the fan-shaped middle pier.

[0008] The two sides of the connecting plate are provided with second groove-shaped connecting parts, which can be spliced ​​with the first groove-shaped connecting parts. A plurality of T-shaped beam plates are spliced ​​in pairs, and a connecting plate is arranged between the large-diameter ends of the bottom plates of adjacent T-shaped beam plates. The first groove-shaped connecting parts are spliced ​​and fixed with the second groove-shaped connecting parts to form a complete circular ring as a whole;

[0009] The bottom surface of the fan-shaped middle pier is placed on the small diameter end of the bottom plate of the T-shaped beam plate, and the two are fixed by anchor bolts and anchor plates. The outer arc surface of the fan-shaped middle pier contacts the side armpit of the T-shaped beam plate and is fixed by tensioning anchor rods. It is also tensioned and locked with the fan-shaped middle pier and T-shaped beam plate on the opposite side by the same tensioning anchor rods.

[0010] In the above technical solution, further, the fan-shaped middle pier and the bottom plate of the corresponding T-shaped beam plate below are vertically provided with a first reserved installation hole penetrating therethrough, the top surface of the fan-shaped middle pier is provided with an upper anchor plate slot for installing the upper anchor plate, and the bottom surface of the bottom plate of the corresponding T-shaped beam plate below the fan-shaped middle pier is provided with a lower anchor plate slot for installing the lower anchor plate, and the anchor bolt is installed in the first reserved installation hole and locked and fixed with the upper anchor plate and the lower anchor plate. The anchor bolt and the anchor plate can be customized according to the requirements of the wind turbine manufacturer, and the anchor plate is usually designed as a two-piece splicing type.

[0011] Furthermore, the upper and lower parts of the fan-shaped middle pier are each provided with a fastening unit, and the fastening unit includes: two second reserved mounting holes, an inner clamp, and an outer clamp respectively penetrating the fan-shaped middle pier from the side of the fan-shaped middle pier close to the inner and outer parts, and an inner clamp anchor end and an outer clamp anchor end are respectively provided on the inner and outer surfaces of the corresponding fan-shaped middle pier; in the upper fastening unit: the inner clamp passes through the inner second reserved mounting hole and is anchored at the inner clamp anchor end, the outer clamp passes through the outer second reserved mounting hole and is anchored at the outer clamp anchor end, and the lower fastening unit is the same.

[0012] Furthermore, the fan-shaped center pier and T-shaped beam plate have the same central angle and both have an even number of blocks. A third reserved mounting hole is provided in the radial direction of the fan-shaped center pier and at the corresponding position of the side armpit of the center beam of the T-shaped beam plate. A tension anchor rod is provided in the third reserved mounting hole to fix the fan-shaped center pier and the T-shaped beam plate. At the same time, the tension anchor rod is inserted into the third reserved mounting hole of the fan-shaped center pier and the T-shaped beam plate on the opposite side to also fix the fan-shaped center pier and the T-shaped beam plate on the opposite side.

[0013] Furthermore, the first groove-type connection part is a step groove, and the second groove-type connection part is an inverted step groove. The upper part of the step groove and the upper part of the inverted step groove are both provided with mortise and tenon connection keys, the lower part of the step groove is provided with embedded bolts, and the upper part of the inverted step groove is provided with a fourth reserved mounting hole passing through. The upper part of the inverted step groove can overlap the lower part of the step groove, and the mortise and tenon connection keys on both sides match to realize the mortise and tenon connection, and the embedded bolts pass through the fourth reserved mounting hole and are combined with nuts to fix the T-beam plate and the connecting plate.

[0014] Furthermore, the upper portion of the T-beam plate is a variable-section trapezoidal beam, and the beam height gradually decreases radially outward.

[0015] The utility model also provides a construction method for constructing a fan foundation of an assembled beam-slab structure as described in any one of the above items, and the steps are as follows:

[0016] Step 1: When excavating the wind turbine foundation, lower the base elevation within a circular range with the outer diameter of the fan-shaped middle pier as the diameter, leave enough space for anchor bolts and anchor plates to construct the post-cast strip, lay the cable buried pipe, and then pour the concrete cushion layer.

[0017] Step 2: After the cushion layer meets the construction requirements, the bottom plate of the T-beam plate and the cushion layer can be fixed by structural adhesive or mechanical connection. After the installation of the T-beam plate is completed, the T-beam plates are connected together through the connecting plate and the embedded bolts are tightened.

[0018] Step 3: Lift the fan-shaped middle pier to the corresponding position of the T-shaped beam plate. The post-cast strip area left at the bottom of the fan-shaped middle pier is convenient for the installation and fixation of the lower anchor plate. The anchor bolts pass through the first reserved installation holes and fix the fan-shaped middle pier and the T-shaped beam plate through the upper and lower anchor plates, and prestressing is performed to reach the design value.

[0019] Step 4: After completing the above steps, pour the post-cast strip in the fan-shaped middle pier area, install the fan-shaped middle pier clamps and tension anchor rods in sequence, and complete the prestressing according to the design requirements.

[0020] Step 5: After completing the foundation installation, test the working status of the component health monitor to ensure that the foundation backfill can be carried out after the prestressing value of each anchor rod meets the design requirements.

[0021] Compared with the prior art, the utility model has the following beneficial effects: the assembled beam-slab structure fan foundation:

[0022] (1) The foundation can be prefabricated in the factory. The foundation size design takes into account the current road transportation standards, which can be transported by conventional roads and effectively reduce transportation costs. The foundation components are simple in design and can be quickly assembled on site, improving construction efficiency and quality.

[0023] (2) For the connection between the T-shaped beam and the middle pier, the main components of the foundation are connected with tension anchors in the horizontal direction, which effectively reduces the wet grouting operation. The beam and the middle pier and other main load-bearing components are reliably connected by prestressing, which strengthens the overall stability and greatly improves the construction quality. At the same time, two annular hoops are set at the top and bottom of the middle pier to improve the overall stability of the core load-bearing area.

[0024] (3) Anchor bolt installation reserved holes and anchor plate installation grooves are set at the corresponding positions of the middle pier and the T-shaped beam plate, which can be compatible with the current anchor bolt cage installation of major wind turbine manufacturers on the market without the need for supporting design.

[0025] (4) The connection between the T-beam bottom plates adopts mortise and tenon structure connection keys, and anchor bolts are used for vertical reinforcement to achieve dry grouting-free connection.

[0026] (5) In addition, long-term health monitoring sensors can be installed at the main component parts for long-term health monitoring of the prefabricated beam-slab structure wind turbine foundation, providing reliable data for foundation operation and maintenance and reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional side view structural diagram of an embodiment of the utility model

[0028] Figure 2 This is a schematic diagram of the top view of the structure of the embodiment of the utility model

[0029] Figure 3 This is a schematic diagram of the cross-sectional structure of an embodiment of the utility model

[0030] Figure 4 This is a schematic diagram of the fan-shaped middle pier structure of the utility model embodiment

[0031] Figure 5 This is a schematic diagram of the T-shaped beam structure of the utility model embodiment

[0032] Figure 6 This is a schematic diagram of the structure of the connecting plate of the utility model embodiment

[0033] Figure 7 This is a schematic diagram of the connection of the clamp in the embodiment of the utility model

[0034] In the figure: 1. fan-shaped middle pier, 2. T-shaped beam plate, 3. connecting plate, 101. anchor bolt, 102 anchor plate, 103 first reserved installation hole, 104. upper anchor plate slot, 105. inner hoop, 106. outer hoop, 107. second reserved installation hole, 201. tension anchor rod, 202. embedded bolt, 203. third reserved installation hole, 204. lower anchor plate slot, 205. beam side armpit, 301. fourth reserved installation hole, 302. mortise and tenon connection key, 4. component health monitoring sensor. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] In the assembled beam-slab structure wind turbine foundation of the utility model, the middle pier is spliced ​​by a plurality of fan-shaped middle piers, and anchor bolt installation holes and upper and lower anchor plate slots are reserved to facilitate the installation of anchor bolt cages. The middle piers are fixed by tension anchor rods and hoops at the upper and lower ends of the middle piers to form an effective whole. The fan-shaped middle pier and the T-beam plate are connected vertically through the anchor bolt cage, and horizontally through the tension anchor rods between the T-beams to form a combined force to improve the bearing capacity of the middle pier. The T-beam plates are connected to form a whole through the connecting plate, and the connecting plate and the T-beam plate are reinforced by vertical embedded bolts and horizontal mortise and tenon connection keys to make the overall force form more coordinated and stable.

[0037] Example 1

[0038] See also Figure 1-7 The present embodiment provides a prefabricated beam-slab structure wind turbine foundation, including a fan-shaped middle pier 1, a T-shaped beam plate 2, a connecting plate 3, an anchor bolt 101, an anchor plate 102, a first reserved installation hole 103, an upper anchor plate slot 104, a top hoop 105, a bottom hoop 106, a second reserved installation hole 107, an inner hoop anchor end 108, an outer hoop anchor end 109, a tension anchor rod 201, an embedded bolt 202, a third reserved installation hole 203, a lower anchor plate slot 204, a beam side axle 205, a fourth reserved installation hole 301, a mortise and tenon connection key 302, and a component health monitoring sensor 4.

[0039] like Figure 4 , Figure 7 As shown, the fan-shaped middle pier 1 is a fan-ring column prefabricated component with a certain central angle, and two rows of second reserved installation holes 107 are respectively provided at the upper and lower ends of the side surface, that is, for each of the upper and lower ends, there is a fastening unit, including: two second reserved installation holes 107 that penetrate the fan-shaped middle pier from the side surface of the fan-shaped middle pier close to the inner side and the outer side, respectively, the inner hoop 105 and the outer hoop 106 pass through the two rows of second reserved installation holes 107, and at the corresponding fan-shaped middle pier 1 The inner and outer surfaces are respectively provided with an inner clamp anchor end 108 and an outer clamp anchor end 109; a plurality of fan-shaped middle piers 1 are spliced ​​in pairs to form a hollow cylindrical middle pier, and are fixed by an inner clamp 105 and an outer clamp 106. Specifically, the inner clamp 105 and the outer clamp 106 pass through the second reserved mounting holes 107 close to the inside and the outside, respectively, and are anchored on the inner clamp anchor end 108 and the outer clamp anchor end 109, respectively. Any anchoring method can be used.

[0040] like Figure 5As shown, the T-shaped beam plate 2 comprises a fan-shaped bottom plate with a certain central angle, a beam, and a beam side arm 205, the edges of both sides of the large diameter end of the bottom plate are provided with a first groove-shaped connecting portion, the beam is arranged on the bottom plate to form an inverted "T" shape as a whole, and the beam side arm 205 is arranged at one end of the beam, and its curvature is consistent with the outer arc surface of the fan-shaped middle pier 1;

[0041] like Figure 6 As shown, the two sides of the connecting plate 3 are provided with a second groove-shaped connecting portion, which can be spliced ​​with the first groove-shaped connecting portion, and a plurality of T-shaped beam plates 2 are spliced ​​in pairs, and a connecting plate 3 is arranged between the large-diameter ends of the bottom plates of adjacent T-shaped beam plates, which are fixed by splicing the first groove-shaped connecting portion and the second groove-shaped connecting portion, and the whole forms a complete circular ring;

[0042] like Figure 1 , 2 5. The bottom surface of the fan-shaped middle pier 1 is placed on the small diameter end of the bottom plate of the T-shaped beam plate 2, and the two are fixed by anchor bolts and anchor plates. The outer arc surface of the fan-shaped middle pier 1 is in contact with the side armpit of the T-shaped beam plate 2 and is fixed by tensioning anchor rods, and is tensioned and locked with the fan-shaped middle pier 1 and T-shaped beam plate 2 on the opposite side by the same tensioning anchor rods.

[0043] The fan-shaped middle pier 1 and the T-shaped beam plate 2 are provided with first reserved installation holes 103 penetrating vertically corresponding to the plate surfaces, and the first reserved installation holes 103 are provided with anchor bolts 101 .

[0044] A third reserved mounting hole 203 is provided at the corresponding position of the arc surface (in the radial direction) of the fan-shaped middle pier 1 and the armpit 205 of the beam side of the T-shaped beam plate 2, and a tension anchor rod 201 is provided in the third reserved mounting hole 203 to fix the fan-shaped middle pier 1 and the T-shaped beam plate 2. At the same time, the tension anchor rod 201 penetrates into the third reserved mounting hole 203 of the fan-shaped middle pier 1 and the T-shaped beam plate 2 on the opposite side to also fix the fan-shaped middle pier 1 and the T-shaped beam plate 2 on the opposite side, and the tension anchor rod is tensioned and locked.

[0045] like Figure 5 and Figure 6 The first groove-type connection part is a step groove, and the second groove-type connection part is an inverted step groove. The upper part of the step groove and the upper part of the inverted step groove are both provided with mortise and tenon connection keys 302, the lower part of the step groove is provided with embedded bolts 202, and the upper part of the inverted step groove is provided with a fourth reserved installation hole 301 that penetrates therethrough. The upper part of the inverted step groove can overlap the lower part of the step groove, and the mortise and tenon connection keys 302 on both sides match to realize the mortise and tenon connection, so that the connecting member 3 can be completely assembled with the T-shaped beam plates 2 on both sides into an integrated plate, and at the same time, the embedded bolts 202 pass through the fourth reserved installation hole 301 and combine with nuts to fix the T-shaped beam plates 2 and the connecting plates 3.

[0046] An upper anchor plate slot 104 is reserved on the top surface of the fan-shaped middle pier 1, and a first reserved mounting hole 103 is arranged vertically. A first reserved mounting hole 103 is arranged at a corresponding position of the bottom plate of the T-shaped beam plate 2, and an anchor plate slot 204 is reserved on the bottom surface. The position of the first reserved mounting hole 103 matches the position of the reserved upper and lower anchor plate slots 104 and 204, so as to facilitate the installation of the anchor plate 102 and the anchor bolt 101. The anchor bolt 101 and the anchor plate 102 can be customized according to the requirements of the wind turbine manufacturer, and the anchor plate 102 is usually designed as a two-piece splicing type. The anchor bolt 101 is installed in the first reserved mounting hole 103 and is locked and fixed with the upper anchor plate and the lower anchor plate, and in particular, an anchor bolt cage can be formed.

[0047] The fan-shaped center pier 1 and the T-shaped beam plate 2 have the same central angle, which can be 10°, 20°, 30° or other angles that are divisible by 360°, and can be assembled in pairs to form a circular beam-plate type wind turbine foundation, and the number of fan-shaped center piers 1 and T-shaped beam plates 2 is preferably an even number to facilitate the setting of tension anchor rods.

[0048] The upper portion of the T-shaped beam plate 2 can generally be a variable-section trapezoidal beam, the beam height of which gradually decreases radially outward, and the lower portion of the T-shaped beam plate 2 is a fan-shaped bottom plate, the inner diameter of which is consistent with the fan-shaped middle pier 1, and the outer diameter gradually increases radially.

[0049] The plane of the connecting plate 3 may be fan-shaped, and the size gradually increases along the radial direction. The connecting plate 3 connects the T-shaped beam plates 2 in pairs through the mortise and tenon connection keys 301 and the embedded bolts 202 to form a whole.

[0050] Two component health monitoring sensors 4 are respectively arranged on the upper surface of the T-shaped beam plate 2 and at the three-division positions of the inner arc surface of the fan-shaped middle pier 1 .

[0051] Example 2

[0052] The construction method of the assembled beam-slab structure wind turbine foundation of Example 1 includes the following steps:

[0053] Step 1: When excavating the wind turbine foundation, the base elevation is lowered within a circular range with the outer diameter of the fan-shaped middle pier 1 as the diameter, leaving a post-cast strip with sufficient construction space for the anchor bolts 101 and the anchor plates 102, laying the cable buried pipe, and then pouring the concrete cushion layer.

[0054] Step 2: After the cushion layer meets the construction requirements, the bottom plate of the T-shaped beam plate 2 and the cushion layer can be fixed by structural adhesive or mechanical connection. After the installation of the T-shaped beam plate 2 is completed, the T-shaped beam plates 2 are connected together through the connecting plate 3, and the embedded bolts 202 are tightened.

[0055] Step 3: Lift the fan-shaped middle pier 1 to the corresponding position of the T-shaped beam slab 2. The post-cast strip area reserved at the bottom of the fan-shaped middle pier 1 is convenient for the installation and fixation of the lower anchor plate 102. The anchor bolt 101 passes through the first reserved installation hole 103 and fixes the fan-shaped middle pier 1 to the T-shaped beam slab 2 through the upper and lower anchor plates 102, and prestressing is performed to reach the design value.

[0056] Step 4: After completing the above steps, cast the post-cast strip in the fan-shaped middle pier area, install the inner clamp 105, the outer clamp 106 and the tension anchor 201 at the upper and lower ends of the fan-shaped middle pier 1 in sequence, and complete the prestressing according to the design requirements.

[0057] Step 5: After completing the foundation installation, install and test the working status of the component health monitor to ensure that the foundation backfill can be carried out after the prestressing value of each anchor rod meets the design requirements.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the ideas and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An assembled beam-slab structure fan foundation, characterized in that: It comprises a fan-shaped center pier (1), a T-shaped beam plate (2), and a connecting plate (3); the fan-shaped center pier (1) is a fan-shaped columnar component with a certain central angle, and a plurality of fan-shaped center piers (1) are spliced ​​in pairs to form a hollow cylindrical center pier and fixed by a hoop; the T-shaped beam plate (2) comprises a fan-shaped bottom plate with a certain central angle, a beam, and a beam side arm (205), the edges of the large diameter end of the bottom plate are provided with a first groove-shaped connecting portion on both sides, the beam is arranged on the bottom plate to form an inverted "T" shape as a whole, the beam side arm (205) is arranged at one end of the beam, and its curvature is consistent with the outer arc surface of the fan-shaped center pier (1); the connecting plate (3) is provided with a second groove-shaped connecting portion on both sides, which can be spliced ​​with the first groove-shaped connecting portion, and a plurality of T-shaped beam plates (2) are spliced ​​in pairs, and a connecting plate (3) is arranged between the large diameter ends of the bottom plates of adjacent T-shaped beam plates, and is fixed by splicing the first groove-shaped connecting portion with the second groove-shaped connecting portion, so as to form a complete circular ring as a whole; The fan-shaped middle pier (1) and the T-shaped beam plate (2) have the same central angle and both have an even number of blocks. The bottom surface of the fan-shaped middle pier (1) is placed on the small diameter end of the bottom plate of the T-shaped beam plate (2). The fan-shaped middle pier (1) and the bottom plate of the corresponding T-shaped beam plate (2) below are vertically provided with a first reserved installation hole (103) penetrating therethrough. The top surface of the fan-shaped middle pier (1) is provided with an upper anchor plate slot (104) for installing the upper anchor plate. 1) A lower anchor plate slot (204) is reserved on the bottom surface of the bottom plate corresponding to the T-shaped beam plate (2) below for installing the lower anchor plate, and the anchor bolt (101) is installed in the first reserved installation hole (103) and is locked and fixed with the upper anchor plate and the lower anchor plate; the outer arc surface of the fan-shaped middle pier (1) contacts the side armpit of the T-shaped beam plate (2) and is fixed by a tension anchor rod, and is tensioned and locked with the fan-shaped middle pier (1) and the T-shaped beam plate (2) on the opposite side by the same tension anchor rod.

2. The assembled beam-slab structure fan foundation according to claim 1 is characterized in that: The anchor bolt (101) is locked and fixed with the upper anchor plate and the lower anchor plate to form an anchor bolt cage.

3. The assembled beam-slab structure fan foundation according to claim 1 is characterized in that: The upper and lower parts of the fan-shaped middle pier (1) are each provided with a fastening unit, the fastening unit comprising: two second reserved mounting holes (107) respectively penetrating the fan-shaped middle pier from the side of the fan-shaped middle pier close to the inner side and the outer side, an inner hoop (105), and an outer hoop (106), and an inner hoop anchoring end (108) and an outer hoop anchoring end (109) are respectively provided on the inner and outer surfaces of the corresponding fan-shaped middle pier (1); in the upper fastening unit: the inner hoop (105) passes through the inner second reserved mounting hole (107) and is anchored to the inner hoop anchoring end (108), and the outer hoop (106) passes through the outer second reserved mounting hole (107) and is anchored to the outer hoop anchoring end (109), and the lower fastening unit is similar.

4. The assembled beam-slab structure fan foundation according to claim 1, characterized in that: A third reserved mounting hole (203) is provided in the radial direction of the fan-shaped middle pier (1) and at a corresponding position of the side armpit (205) of the middle beam of the T-shaped beam plate (2). A tension anchor rod (201) is provided in the third reserved mounting hole (203) for fixing the fan-shaped middle pier (1) and the T-shaped beam plate (2). At the same time, the tension anchor rod (201) penetrates into the third reserved mounting hole (203) of the fan-shaped middle pier (1) and the T-shaped beam plate (2) on the opposite side to also fix the fan-shaped middle pier (1) and the T-shaped beam plate (2) on the opposite side.

5. The assembled beam-slab structure fan foundation according to claim 1 is characterized in that: The first groove-type connection portion is a step groove, and the second groove-type connection portion is an inverted step groove. The upper half of the step groove and the upper half of the inverted step groove are both provided with mortise and tenon connection keys (302), the lower half of the step groove is provided with embedded bolts (202), and the upper half of the inverted step groove is provided with a fourth reserved installation hole (301) that passes through. The upper half of the inverted step groove can overlap the lower half of the step groove, and the mortise and tenon connection keys (302) on both sides match to achieve mortise and tenon connection, so that the connecting plate (3) can be completely assembled with the T-shaped beam plate (2) into an integrated plate. At the same time, the embedded bolts (202) pass through the fourth reserved installation holes (301) and are combined with nuts to fix the T-shaped beam plate (2) and the connecting plate (3).

6. The assembled beam-slab structure fan foundation according to claim 1, characterized in that: The upper portion of the T-shaped beam plate (2) is a variable-section trapezoidal beam, and the beam height gradually decreases radially outwards.

7. The assembled beam-slab structure fan foundation according to claim 1, characterized in that: Two component health monitoring sensors (4) are respectively arranged on the upper surface of the T-shaped beam plate (2) and at three equal parts of the inner arc surface of the fan-shaped middle pier (1).

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