Steel structure assembly type fan foundation and construction method

Abstract

The invention discloses a steel structure assembly type fan foundation and a construction method, and belongs to the technical field of fan foundations. The steel structure assembly type fan foundation comprises fan-shaped foundation components, circumferential connecting plates and anchor bolt assemblies. The plurality of fan-shaped foundation components are uniformly distributed in the circumferential direction; the circumferential connecting plates are fixedly connected between the two adjacent fan-shaped foundation components; every two adjacent fan-shaped foundation components are fixedly connected in the circumferential direction through a fastener. The anchor bolt assembly is arranged in an inner cavity of the fan-shaped foundation component in a penetrating mode, the bottom end of the anchor bolt assembly is fixedly connected with the fan-shaped foundation component, and the top end of the anchor bolt assembly extends to the position above the fan-shaped foundation component in the axial direction. The method has the advantages of being simple in construction procedure and convenient to install, the influence of environmental factors on construction can be avoided, the fan construction time is saved, the construction cost is saved, and the construction quality can also be guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fan foundation, in particular to a steel structure assembled fan foundation and a construction method thereof. BACKGROUND

[0002] At present, China is facing energy transformation, and a new energy system with clean, low-carbon, safe and efficient is being constructed. Among many clean energies, wind energy has become the fastest growing new energy in recent years. Wind energy is inexhaustible and has little impact on the environment. Developing wind power can greatly alleviate the environmental pollution pressure caused by traditional energy. With the maturation of wind turbine technology, the growth of wind power is also very rapid, becoming the most suitable new energy for planning and development.

[0003] The fan foundation is an important part of the fan structure, and its construction directly affects the economy of the entire fan. The existing fan foundation is mostly bound with reinforcement on site and poured with concrete, and the construction is greatly affected by the site environment. Not only is the construction period long, but the construction quality is difficult to guarantee, and the construction is limited in winter.

[0004] Therefore, how to reduce the influence of environmental conditions on the construction of the fan foundation and improve the construction efficiency and construction quality of the fan foundation has become a technical problem to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a steel structure assembled fan foundation to reduce the influence of environmental conditions on the construction of the fan foundation and improve the construction efficiency and construction quality of the fan foundation.

[0006] The technical scheme adopted by the present application is as follows: a steel structure assembled fan foundation, comprising: a fan-shaped foundation component, a circumferential connecting plate and an anchor bolt assembly;

[0007] A plurality of fan-shaped foundation components are uniformly distributed in the circumferential direction;

[0008] The fan-shaped foundation component comprises a foundation bottom plate, a connecting wing plate, a radial rib plate and a foundation stand column, the foundation stand column is fixedly connected above the inner end of the foundation bottom plate, the connecting wing plate is fixedly connected above the outer end of the foundation bottom plate, the radial rib plate is fixedly connected above the foundation bottom plate, the inner end of the radial rib plate is fixedly connected with the foundation stand column, and the outer end of the radial rib plate is fixedly connected with the connecting wing plate;

[0009] The circumferential connecting plate is fixedly connected between the connecting wing plates of two adjacent fan-shaped foundation components;

[0010] The two adjacent foundation stand columns are fixedly connected in the circumferential direction by fasteners;

[0011] The anchor bolt assembly is inserted into the inner cavity of the foundation column. The bottom end of the anchor bolt assembly is fixedly connected to the foundation column, and the top end of the anchor bolt assembly extends axially to the top of the foundation column.

[0012] Preferably, the foundation column includes radial side plates, end plates, a top plate, and a horizontal web plate. The two radial side plates are fixedly connected to the top of the foundation base plate in the radial direction. The end plate is fixedly connected to the outer ends of the two radial side plates. The horizontal web plate is fixedly connected between the two radial side plates. The top plate is fixedly connected between the top ends of the two radial side plates.

[0013] A lower through hole is provided on the horizontal web, and an upper through hole is provided on the top plate to mate with the lower through hole. The anchor bolt assembly includes an anchor rod, an upper limit nut, a lower limit nut, and a fastening nut. The anchor rod passes through the upper and lower through holes. The upper limit nut is located above the horizontal web and is threaded onto the anchor rod. The lower limit nut is located below the horizontal web and is threaded onto the anchor rod. The fastening nut is threaded onto the top of the anchor rod and is used to fix the wind turbine tower to the foundation column.

[0014] Preferably, the radial side plate has multiple circumferential connecting holes, and the fasteners include high-strength bolts, washers, and connecting nuts. One end of the high-strength bolt passes through the circumferential connecting holes of two adjacent foundation columns, the washer is sleeved on the high-strength bolt, and the connecting nut is threadedly connected to the high-strength bolt.

[0015] Preferably, each of the fan-shaped foundation components includes two radial ribs, and a circumferential web is fixedly connected between the two radial ribs, and the plurality of circumferential webs are spaced apart in the radial direction.

[0016] Preferably, the two connecting wing plates are installed one-to-one on opposite sides of the two radial ribs, and the connecting wing plates are provided with interconnected circumferential slots and radial through holes. One end of the circumferential connecting plate is inserted into the circumferential slot, and the circumferential connecting plate is provided with connecting holes corresponding to the radial through holes, and connecting bolts are installed in the radial through holes.

[0017] Preferably, the circumferential connecting plate is a V-shaped plate.

[0018] Preferably, the fan-shaped foundation component is a prefabricated steel structure component.

[0019] The second objective of this invention is to provide a construction method for a steel structure prefabricated wind turbine foundation, the construction method comprising the following steps:

[0020] S1: Prefabricate the aforementioned sector-shaped foundation components and circumferential connecting plates;

[0021] S2: Excavate the foundation pit and pour the foundation pad for the wind turbine;

[0022] S3: placing a fan-shaped foundation component in a circumferential direction on the fan foundation cushion layer;

[0023] S4: connecting the foundation columns of two adjacent fan-shaped foundation components through the fasteners;

[0024] S5: fixedly connecting the connecting flanges of two adjacent fan-shaped foundation components through the connecting bolts and the circumferential connecting plates;

[0025] S6: installing an anchor bolt assembly on the fan-shaped foundation component;

[0026] S7: placing a ballast block on the fan-shaped foundation component, backfilling the surface with soil and compacting;

[0027] S8: installing a fan tower.

[0028] Advantages of the present application:

[0029] The present application adopts an assembled structure, and a plurality of circumferentially distributed fan-shaped foundation components are connected into a fan foundation through circumferential connecting pieces and fasteners, and each fan-shaped foundation component is a prefabricated component, which not only has the advantages of simple construction process and convenient installation, but also can avoid the influence of environmental factors on construction, save fan construction time, save construction cost, and ensure construction quality. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Fig. 1 is a structural schematic diagram of a steel structure assembled fan foundation of the present application;

[0031] Figure 2 Fig. 2 is a first perspective schematic diagram of a fan-shaped foundation component;

[0032] Figure 3 Fig. 3 is a second perspective schematic diagram of a fan-shaped foundation component;

[0033] Figure 4 Fig. 4 is a structural schematic diagram of a circumferential connecting plate;

[0034] Figure 5 Fig. 5 is a structural schematic diagram of an anchor bolt assembly;

[0035] Figure 6 Fig. 6 is a structural schematic diagram of a fastener;

[0036] Figure 7 Fig. 7 is a connecting schematic diagram of two adjacent fan-shaped foundation components.

[0037] Explanation of reference signs in the drawings:

[0038] 100, fan-shaped foundation component;

[0039] 110, foundation bottom plate;

[0040] 120, connecting wing plate; 121, circumferential slot; 122, radial through hole;

[0041] 130, radial rib plate;

[0042] 140, base column; 141, radial side plate; 142, end plate; 143, top plate; 144, horizontal web plate; 145, lower through hole; 146, upper through hole; 147, circumferential connecting hole;

[0043] 150, circumferential web plate;

[0044] 200, circumferential connecting plate; 210, connecting hole;

[0045] 300, anchor assembly; 310, anchor rod; 320, upper limit nut; 330, lower limit nut; 340, fastening nut; 350, gasket;

[0046] 400, fastener; 410, high-strength bolt; 420, gasket; 430, connecting nut;

[0047] 500, connecting bolt. DETAILED DESCRIPTION

[0048] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present application, and are not limiting to the present application.

[0049] In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for description purposes and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] Furthermore, in the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0052] As shown in the embodiment, Figures 1-7 A steel structure assembled fan foundation, which comprises: a plurality of fan-shaped foundation components 100, a plurality of circumferential connecting plates 200, and a plurality of anchor assemblies 300.

[0053] The plurality of fan-shaped foundation components 100 are evenly distributed in the circumferential direction.

[0054] Each fan-shaped foundation component 100 comprises a foundation bottom plate 110, a connecting wing plate 120, a radial rib plate 130, and a foundation stand 140; the foundation bottom plate 110 is horizontally arranged, the foundation stand 140 is fixedly connected above the inner end of the foundation bottom plate 110, the connecting wing plate 120 is fixedly connected above the outer end of the foundation bottom plate 110, and the radial rib plate 130 is fixedly connected above the foundation bottom plate 110, with the inner end of the radial rib plate 130 fixedly connected with the foundation stand 140 and the outer end of the radial rib plate 130 fixedly connected with the connecting wing plate 120.

[0055] The plurality of circumferential connecting plates 200 are fixedly connected between the connecting wing plates 120 of the adjacent two fan-shaped foundation components 100, so as to connect the plurality of fan-shaped foundation components 100 in the circumferential direction.

[0056] The foundation stands 140 of the adjacent two fan-shaped foundation components 100 are fixedly connected in the circumferential direction by the fasteners 400.

[0057] The plurality of anchor assemblies 300 are arranged in the inner cavities of the foundation stands 140, with the bottom ends of the anchor assemblies 300 fixedly connected with the foundation stands 140 and the top ends of the anchor assemblies 300 extending above the foundation stands 140 in the axial direction.

[0058] The present application adopts an assembled structure, and the plurality of circumferentially distributed fan-shaped foundation components 100 can be connected into a fan foundation by the circumferential connecting plates 200 and the fasteners 400, and each fan-shaped foundation component 100 is a prefabricated component, which not only has the advantages of simple construction process and convenient installation, but also can avoid the influence of environmental factors on construction, save fan construction time, save construction cost, and ensure construction quality.

[0059] As shown in the embodiment, Figures 1-7 A steel structure assembled fan foundation, which comprises: a plurality of fan-shaped foundation components 100, a plurality of circumferential connecting plates 200, and a plurality of anchor assemblies 300.

[0060] The fan-shaped foundation component 100 is a steel structure prefabricated component, and the number of the fan-shaped foundation components 100 is multiple, such as 16, and the multiple fan-shaped foundation components 100 are uniformly distributed in the circumferential direction.

[0061] Each fan-shaped foundation component 100 comprises a foundation bottom plate 110, a connecting wing plate 120, a radial rib plate 130 and a foundation stand column 140; the foundation bottom plate 110 is overall fan-shaped, and the foundation bottom plate 110 is arranged in the horizontal direction; the foundation stand column 140 is fixedly connected above the inner end of the foundation bottom plate 110, that is, the foundation stand column 140 is fixedly installed above the foundation bottom plate 110, and in the radial direction, the foundation stand column 140 is located at the end of the foundation bottom plate 110 close to the center of the circle. The connecting wing plate 120 is fixedly connected above the outer end of the foundation bottom plate 110, that is, the connecting wing plate 120 is fixedly installed above the foundation bottom plate 110, and in the radial direction, the connecting wing plate 120 is located at the end of the foundation bottom plate 110 away from the center of the circle. The radial rib plate 130 is fixedly connected above the foundation bottom plate 110, and the radial rib plate 130 is arranged in the radial direction, the inner end of the radial rib plate 130 is fixedly connected with the foundation stand column 140, and the outer end of the radial rib plate 130 is fixedly connected with the connecting wing plate 120.

[0062] Specifically, the foundation stand column 140 comprises a radial side plate 141, an end plate 142, a top plate 143 and a horizontal web plate 144; the number of the radial side plate 141 is two, the two radial side plates 141 are fixedly connected above the foundation bottom plate 110 in the radial direction, the end plate 142 is fixedly connected with the outer ends of the two radial side plates 141, the horizontal web plate 144 is fixedly connected between the two radial side plates 141, and the top plate 143 is fixedly connected between the top ends of the two radial side plates 141, so that the foundation stand column 140 is overall fan-shaped with the inner end being open. A lower through hole 145 is formed in the horizontal web plate 144, and an upper through hole 146 is formed in the top plate 143 and cooperates with the lower through hole 145, that is, the upper through hole 146 is coaxially arranged with the lower through hole 145.

[0063] The number of the anchor bolt assemblies 300 is multiple, and multiple anchor bolt assemblies 300 are installed on each foundation stand column 140, the anchor bolt assembly 300 is overall installed in the inner cavity of the foundation stand column 140, the bottom end of the anchor bolt assembly 300 is fixedly connected with the foundation stand column 140, and the top end of the anchor bolt assembly 300 extends above the foundation stand column 140 in the axial direction, for fixing the flange plate at the bottom end of the fan tower to the foundation stand column 140.

[0064] Specifically, each anchor assembly 300 comprises an anchor rod 310, an upper limiting nut 320, a lower limiting nut 330 and a fastening nut 340, the anchor rod 310 is arranged in the upper through hole 146 and the lower through hole 145 from top to bottom, the upper limiting nut 320 is located above the horizontal web plate 144, and the upper limiting nut 320 is threadedly connected on the anchor rod 310; the lower limiting nut 330 is located below the horizontal web plate 144, and the lower limiting nut 330 is threadedly connected on the anchor rod 310; the fastening nut 340 is threadedly connected at the top end of the anchor rod 310, and a gasket 350 is further sleeved on the anchor rod 310, for fixing and connecting the fan tower with the foundation column 140.

[0065] In the circumferential direction, the adjacent two foundation columns 140 are fixedly connected by a plurality of fasteners 400.

[0066] Specifically, a plurality of circumferential connecting holes 147 are formed in each radial side plate 141; the fastener 400 comprises a high-strength bolt 410, a gasket 420 and a connecting nut 430, one end of the high-strength bolt 410 is arranged in the circumferential connecting hole 147 of the adjacent two foundation columns 140, the gasket 420 is sleeved on the high-strength bolt 410, and the connecting nut 430 is threadedly connected with the high-strength bolt 410.

[0067] It should be noted that after the plurality of fan-shaped foundation components 100 are fixedly connected into the fan foundation along the circumferential direction, an operating cavity with an open top is formed in the middle of the fan foundation, the operating cavity is in communication with the opening of the foundation column 140, so as to facilitate the work of the workers.

[0068] Each fan-shaped foundation component 100 comprises two radial rib plates 130, the two radial rib plates 130 are fixedly installed above the foundation bottom plate 110 in the radial direction, and a circumferential web plate 150 is fixedly connected between the two radial rib plates 130, that is, the circumferential web plate 150 is arranged in the circumferential direction, one end of the circumferential web plate 150 is fixedly connected with one radial rib plate 130, and the other end of the circumferential web plate 150 is fixedly connected with the other radial rib plate 130.

[0069] The circumferential web plate 150 is vertically arranged in multiple, and the multiple circumferential web plates 150 are arranged at intervals in the radial direction; in the radial direction, from the foundation column 140 to the connecting wing plate 120, the vertical height of the two radial rib plates 130 gradually decreases, and the height of the multiple circumferential web plates 150 also gradually decreases, so as to form a cavity for accommodating backfill soil on the foundation column 140.

[0070] The number of the connecting wings 120 is two, and the two connecting wings 120 are installed on the sides of the two radial ribs 130 away from each other, and the circumferential slots 121 and the radial through holes 122 are arranged on the connecting wings 120 and communicate with each other, that is, the circumferential slots 121 are arranged on the connecting wings 120 in the circumferential direction, and the radial through holes 122 are arranged on the connecting wings 120 in the radial direction and communicate with the circumferential slots 121.

[0071] One end of the circumferential connecting plate 200 is inserted into the circumferential slot 121 of one base column 140, the other end of the circumferential connecting plate 200 is inserted into the circumferential slot 121 of another base column 140, and the connecting hole 210 corresponding to the radial through hole 122 is arranged on the circumferential connecting plate 200, that is, the connecting hole 210 is coaxially arranged with the radial through hole 122, and the connecting bolt 500 is arranged in the radial through hole 122, the connecting bolt 500 is a high-strength bolt, so that the circumferential connecting plate 200 and the connecting wing 120 are fixedly connected.

[0072] Preferably, the circumferential connecting plate 200 is a V-shaped plate.

[0073] Embodiment, a construction method of a steel structure assembled fan foundation, the construction method comprises the following steps:

[0074] S1: prefabricating the fan-shaped foundation component 100 and the circumferential connecting plate 200 in the factory.

[0075] S2: excavating the foundation pit and pouring the fan foundation cushion.

[0076] S3: placing the fan-shaped foundation component 100 on the fan foundation cushion in the circumferential direction.

[0077] S4: connecting the base columns 140 of the adjacent two fan-shaped foundation components 100 through the fasteners 400.

[0078] S5: fixedly connecting the connecting wings 120 of the adjacent two fan-shaped foundation components 100 through the connecting bolt 500 and the circumferential connecting plate 200.

[0079] S6: installing the anchor bolt assembly 300 on the fan-shaped foundation component 100.

[0080] S7: placing the ballast block on the fan-shaped foundation component 100, backfilling the surface with soil and compacting.

[0081] S8: installing the fan tower.

[0082] Compared with the prior art, the application has at least the following beneficial technical effects:

[0083] (1) The fan foundation component, connecting plate, high-strength bolt and anchor bolt of the application can be prefabricated in batches in a factory, thereby effectively controlling the cost of the fan foundation.

[0084] (2) The steel structure assembled fan foundation of the application has simple construction procedures and is easy to install, and does not need to use wet connection, thereby effectively saving the construction time of the land fan and saving the construction cost, and the construction quality can be guaranteed.

[0085] (3) The steel structure assembled fan foundation of the application can be installed and constructed in a cold region, thereby avoiding the problems that the fan foundation concrete is difficult to maintain and cannot be constructed in a low-temperature environment, and the construction is less affected by extreme weather such as rainfall, strong wind and snowstorm.

[0086] (4) The arrangement of the circumferential web on the fan foundation component can effectively improve the stress performance of the steel structure and prevent the steel structure from locally buckling and deforming.

[0087] (5) The arrangement of the connecting wing plate and the circumferential connecting plate of the fan foundation component can effectively increase the integrity of the fan foundation structure and improve the overall anti-seismic performance of the steel structure assembled fan foundation.

[0088] The above only describes the preferred embodiments of the application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the application, and these improvements and replacements should also be considered as the protection scope of the application.

Claims

1. A steel structure prefabricated wind turbine foundation, characterized in that, include: Fan-shaped foundation component (100), circumferential connecting plate (200), and anchor bolt assembly (300); The plurality of the aforementioned sector-shaped base components (100) are evenly distributed along the circumferential direction; The fan-shaped foundation component (100) includes a foundation base plate (110), a connecting wing plate (120), a radial rib plate (130), and a foundation column (140). The foundation column (140) is fixedly connected to the upper part of the inner end of the foundation base plate (110). The connecting wing plate (120) is fixedly connected to the upper part of the outer end of the foundation base plate (110). The radial rib plate (130) is fixedly connected to the upper part of the foundation base plate (110). The inner end of the radial rib plate (130) is fixedly connected to the foundation column (140), and the outer end of the radial rib plate (130) is fixedly connected to the connecting wing plate (120). The circumferential connecting plate (200) is fixedly connected between the connecting wing plates (120) of two adjacent sector-shaped base components (100); Two adjacent foundation columns (140) are fixedly connected in the circumferential direction by fasteners (400); The anchor bolt assembly (300) is inserted into the cavity of the foundation column (140). The bottom end of the anchor bolt assembly (300) is fixedly connected to the foundation column (140), and the top end of the anchor bolt assembly (300) extends axially to the top of the foundation column (140).

2. The steel structure prefabricated wind turbine foundation according to claim 1, characterized in that, The foundation column (140) includes radial side plates (141), end plates (142), top plates (143), and horizontal web plates (144). The two radial side plates (141) are fixedly connected to the foundation base plate (110) in the radial direction. The end plates (142) are fixedly connected to the outer ends of the two radial side plates (141). The horizontal web plates (144) are fixedly connected between the two radial side plates (141). The top plate (143) is fixedly connected between the top ends of the two radial side plates (141). The horizontal web (144) has a lower through hole (145), and the top plate (143) has an upper through hole (146) that mates with the lower through hole (145). The anchor bolt assembly (300) includes an anchor rod (310), an upper limit nut (320), a lower limit nut (330), and a fastening nut (340). The anchor rod (310) passes through the upper through hole (146) and the lower through hole (145). The upper limit nut (320) is located above the horizontal web (144) and is threaded onto the anchor rod (310). The lower limit nut (330) is located below the horizontal web (144) and is threaded onto the anchor rod (310). The fastening nut (340) is threaded onto the top of the anchor rod (310) and is used to fix the wind turbine tower to the foundation column (140).

3. A steel structure prefabricated wind turbine foundation according to claim 2, characterized in that, The radial side plate (141) has a plurality of circumferential connecting holes (147). The fastener (400) includes a high-strength bolt (410), a washer (420) and a connecting nut (430). One end of the high-strength bolt (410) passes through the circumferential connecting holes (147) of two adjacent foundation columns (140). The washer (420) is sleeved on the high-strength bolt (410). The connecting nut (430) is threadedly connected to the high-strength bolt (410).

4. The steel structure prefabricated wind turbine foundation according to claim 1, characterized in that, Each of the fan-shaped base components (100) includes two radial ribs (130), and a circumferential web (150) is fixedly connected between the two radial ribs (130), and the plurality of circumferential webs (150) are arranged at intervals along the radial direction.

5. A steel structure prefabricated wind turbine foundation according to claim 4, characterized in that, Two connecting wing plates (120) are installed one-to-one on opposite sides of two radial ribs (130), and the connecting wing plates (120) are provided with interconnected circumferential slots (121) and radial through holes (122). One end of the circumferential connecting plate (200) is inserted into the circumferential slot (121), and the circumferential connecting plate (200) is provided with connecting holes (210) corresponding to the radial through holes (122). Connecting bolts (500) are installed in the radial through holes (122).

6. A steel structure prefabricated wind turbine foundation according to claim 5, characterized in that, The circumferential connecting plate (200) is a V-shaped plate.

7. A steel structure prefabricated wind turbine foundation according to claim 1, characterized in that, The fan-shaped foundation component (100) is a prefabricated steel structure component.

8. A construction method for a steel structure prefabricated wind turbine foundation according to any one of claims 1-7, characterized in that, The construction method includes the following steps: S1: Prefabricate the fan-shaped base component (100) and the circumferential connecting plate (200); S2: Excavate the foundation pit and pour the foundation pad for the wind turbine; S3: Place a fan-shaped foundation component (100) on the fan foundation pad layer along the circumferential direction; S4: The foundation columns (140) of two adjacent sector-shaped foundation components (100) are connected by the fasteners (400); S5: The connecting wing plates (120) of two adjacent sector-shaped base components (100) are fixedly connected by connecting bolts (500) and circumferential connecting plates (200); S6: Install anchor bolt assembly (300) on the sector-shaped base component (100); S7: Place ballast blocks on the fan-shaped foundation component (100), backfill the surface with soil and compact it; S8: Install the wind turbine tower.

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