FORM 2
THE PATENTS ACT 1970
(Act 39 of 70)
COMPLETE SPECIFICATION
(See Section l0)
TITLE OF INVENTION:
SUPPORT ARRANGEMENT FOR A TOWER IN A FOUNDATION OF A WIND TURBINE
APPLICANT(S):
Name: SUZLON ENERGY Ltd.
Nationality: Indian
Address: One Earth, Opp. Magarpatta City, Hadapsar, Pune - 411 028,
Maharashtra, India.
The following complete specification particularly describes the invention and the manner in which it is to be performed.

TITLE:
Support arrangement for a tower in a foundation of a wind turbine
FIELD OF THE INVENTION:
The present invention relates to a supporting arrangement for a tower for a wind turbine (100). More particularly it relates to a system and method of installing and leveling Load Spreading Plate (19) in the foundation (46) of the wind turbine (100) resulting in a more stable foundation by a faster and economical process.
BACKGROUND OF THE INVENTION:
In a conventional concrete pier foundation for wind turbine, the concrete bears the compressive loads and the embedded reinforcing bars (rebar) are sized to bear the tensile loads of the wind turbine. Typically foundations are constructed in two stages, one as a primary foundation to provide a more rigid base and the other stage for the wind turbine installation. Anchor bolts are conventionally placed within a reinforcing steel (rebar) matrix or cage using a removable template at the top and an anchor plate at the bottom of each bolt to prevent anchor bolt displacement or puliout. Thus anchor bolts are typically utilized solely for the purpose of attaching the supported structure to the foundation. Firstly the primary foundation is poured in with concrete, pursuant to the' settling period of the primary foundation; concrete is poured in the second stage of foundation and allowed to settle. Thus it is a time consuming process.
Conventional foundations typically resist overturning movement by their weight. When the foundation is loaded by the structure supported thereon, the foundation is subjected to varying tensile and compressive loads. The tensile load from the overturning moment of the supported structure is applied on the top most floor of the foundation by the anchor bolts and subjects the foundation to tension

substantially. The foundation as a whole typically requires great amount of reinforcing steel and large amount of concrete to encase the reinforcing steel. Extensive labour is also necessary to assemble the reinforcing steel matrix and fill the volume of the foundation with concrete and fix the anchor bolts. A typical cylindrical foundation also requires the use of a large drill to excavate a pit for the primary foundation.
In US 6672023 B2, the foundation was built by first building a conventional preliminary foundation on top of which a supporting arrangement and more specifically an anchor cage was erected, which was poured with concrete. However, the conventional preliminary foundation lacks adequate levelling as the same is not provided by proper levelling means for the anchor ring and support and therefore cannot withstand higher vibration and higher load. Thus this prior art requires frequent maintenance and have a shorter life term of the foundation.
In US7374369 B2, the second foundation was created in two stages. Firstly, the supporting arrangement on top of the first foundation was constructed and concrete was poured in said supporting arrangement with 5cm clearance from a Load Distribution Plate (LSP) placed on top floor of the second foundation. Pursuant to pouring the concrete and allowing it to settle, the levelling of the LSP was done by providing tension and over torqueing the plastic nuts placed immediately below the LSP. The objective was to allow the plastic nuts to break, thereby allowing the LSP to settle and level. Secondly, swelling mortar was injected into the clearance between the LSP and the first poured concrete thereafter the same was allowed to swell and settle. Based on the fact that no levelling means were used to achieve a pre-determined height of the aforementioned first poured concrete on which the LSP is levelled, this has tendency of resulting in inaccurate settling and thereby inaccurate levelling. Further, the entire process requires more resources and longer erection time.

OBJECTS OF INVENTION:
It is the primary object of the present invention to provide a supporting arrangement for a tower (55) of a wind turbine (100).
It is another object of the present invention to provide load spreading plate (19) which withstands the load of a wind turbine (100).
It is another object of the present invention to provide a method for faster execution of the supporting arrangement of a wind turbine (100) foundation (46).
It is another object of the present invention to provide a load spreading plate (19) which distributes the load uniformly.
It is another object of the present invention to provide direct distribution of the load from a wind turbine (100) to the foundation (46).
It is another object of the invention to provide for an increased contact area between a wind turbine (100) tower and the ground surface.
SUMMARY OF THE INVENTION:
In view of the foregoing, there was a need to have a more stable foundation which can withstand higher wind pressures as well as can be erected in a much shorter period of time and by spending lesser resources.
In order to overcome the abovementioned problems in the above prior arts, the present invention provides a solution wherein the preliminary foundation need not be erected. Further, a unique Load Spreading methodology at base of a foundation (46) is used to construct a wind turbine (100) within a shorter time span, which is more economical and has more life time with lesser maintenance.

The foundation of the present invention is capable of resisting very high upset loads and in a manner independent of the concrete of the foundation experiencing ' alternating localized compression and tension loading. Further, the combination of features incorporated in the disclosed embodiments of the present invention enable a foundation to withstand higher vibrations.
BRIEF DESCRIPTION OF THE DRAWINGS:
Figure 1 - shows a wind turbine (100) of the present invention with a tower (55), a bottom flange (50), a nacelle (72), a rotor (71), blades (70) and a wind turbine foundation (46).
Figure 2 (a) - shows a sectional view of a supporting arrangement for a tower (55) of a conventional wind turbine comprising anchor bolts (16), a load spreading plate (CLSP') (19), a bottom flange (50) of a tower of a wind turbine, and foundation (46).
Figure 2 (b) - shows the option of using high strength non - shrinking or expandable cement grout (47).
Figure - 3 (a) reflects the elements of the present invention comprising an anchor ring (15), a levelling stud (11), a steel tube (20), a levelling jig (40), anchor bolts (16), anchor bolt nuts (17), and levelling stud nuts (12). A not depicted embodiment comprises to use a washer between the levelling stud nuts (12) and anchor ring (15) for reducing and/or optimizing the stress situation between both parts.
Figure - 3 (b) reflects the top view of a supporting arrangement comprising a load spreading plate ('LSP') (19), anchor bolts (16), anchor bolt nuts (18), levelling stud adjustment nut (14), levelling stud (11), and a steel tube (20). The anchor

bolts (16) are protruding through recesses (65) in the LSP while the recesses (65) can be embodied as holes or bores, too.
Figure - 4 reflects the sectional view of the supporting arrangement comprising an LSP (19), an anchor ring (15), anchor bolts (16), anchor bolt adjustment nuts (17), levelling stud (11), steel tube (20), LSP adjustment nuts (14), anchor bolt nuts (18), and levelling jig (40). The nuts (18) are used to limit the position of the LSP in vertical position i.e. that the concrete cannot push the LSP (19) out of desired limits.
Figure - 5 (a) shows a brief description of the top view of a supporting arrangement for a tower of a wind turbine (100) comprising members such as, an anchor cage (A) with levelling jig (40), levelling jig adjustment nut (10), anchor ring (15), anchor bolts (16), anchor ring (12), levelling studs (11), steel tubes (20), an LSP (19), and anchor bolt nuts (17).
Figure - 5 (b) shows a brief description of the bottom view of a supporting arrangement comprising members such as, an anchor cage (A) for a tower for a wind turbine (100) comprising an anchor cage (A) with levelling jig (40), anchor ring (15), anchor ring connection plate (35), LSP Connection plate (36), anchor bolts (16), anchor bolt (16) adjustment nuts (17), levelling studs (11), steel tubes (20), an LSP (19).
Figure - 6 shows a levelling jig (40) in the supporting arrangement comprising a levelling stud (11), a levelling stud adjustment nut (12), Washer (13), steel tube (20), and steel tube levelling stud adjustment nuts (14). Sure, the levelling studs and the steel tube can be made from one piece or assembled from different single parts i.e levelling stud (11) and steel tube (20).
Figure - 7 shows a magnified view of a levelling jig (40) comprising a levelling stud (11), a Washer (13), and a levelling stud anchor ring adjustment nut (12).

Figure - 8 shows a side view of a steel tube (20) with steel tube-levelling stud adj ustment nuts (14).
Figure - 9 shows a levelling stud (11) comprising a Washer (13) and a levelling stud LSP adjustment nut (14).
Figure - 10 shows an LSP (19) comprising recesses for anchor bolts (65) while the recesses (65) can be embodied as holes or bores and bores (60) for levelling studs (11) while bores (60) can be embodied as holes or recesses, too.
Figure - 11 shows an anchor ring (15) comprising recesses for anchor bolts (65) and bores (60) for levelling studs (11).
DETAILED DESCRIPTION OF THE INVENTION:
Fig 1. shows a conventional wind turbine (100) comprising a nacelle (72) mounted rotably on a tower (55). The nacelle (72) comprises a rotor having a main shaft mounted in the nacelle (72), a hub (71) mounted to the shaft and blades (70) mounted to the hub (71). The nacelle (72) is positioned in a direction so as to permit the engagement of the blades (70) whenever there is high velocity of wind. The engagement of the blades (70) with high velocity wind causes the hub and the main shaft to rotate, which in turn are coupled to an electric generator to generate electricity. The rotation of the main shaft caused by the rotation of the blades (70), sets off high frequency vibrations throughout the body of the wind turbine (100). These vibrations pass through the base of the wind turbine (100) and also into the ground surface on which the wind turbine (100) is mounted.
Hence there is a need to provide for a foundation (46) comprising an effective supporting arrangement for a wind turbine (100) which can withstand higher vibrations, and also for a foundation (46) which is readily erectable with lower

resource consumption and is readily adaptable for different kinds of wind turbine (100)design/s.
The drawbacks of the prior art as described above are solved by a support arrangement with elements according to an embodiment of the present invention. The support arrangement comprising, a load-spreading plate ('LSP') (19) for supporting a bottom flange (50) of the tower (55) of a wind turbine (100), an anchor ring (15) connected with anchor bolts (16) to form a rigid framework called as an anchor cage (A) in the present invention, a plurality of longitudinal studs referred as levelling studs (11) in the present invention which aid in locating and/or positioning/levelling of the LSP (19) with the help of first supporting means as embodied in figure 9, as well as first adjustment means for providing supporting and/or adjustment of the relative position/s of the LSP (19) with respect to the supporting arrangement, and a second supporting means as embodied in figure - 7, for supporting and/or positioning/levelling the relative position of the anchor ring (15) with respect to the supporting arrangement as embodied in figure 5 (a) or figure 5 (b).
According to an embodiment of the present invention, the first supporting means include but is not limited to, nuts (14) with or without washer/seating plate. The first adjustment means as embodied in the present invention includes but is not limited to, longitudinal studs referred as levelling studs (11) in the present invention wherein the levelling studs (11) are preferably threaded, and accompany nuts (14) preferably with internal threading with or without washer /seating plate so as to permit their fastening with the levelling studs (11).
A further embodiment of the invention discloses that the supporting arrangement comprises levelling studs (11) and first adjustment means, which is not more than 12 in numbers and preferably not more than 6. For example in case of a LSP having a diameter of 4 to 4.5 m diameter the use of 8 levelling studs (11) and first adjustment means is preferred.

Thereby the LSP (19) as embodied in the present invention is satisfactorily located and/or positioned/levelled with respect to the relative position of the LSP (19) with the ground surface and in situ with the members of the supporting arrangement.
In the present invention, the first adjustment means is used for locating and positioning/levelling the LSP (19) to a horizontal position relative to the ground surface and /or rest of the members of the supporting arrangement.
In the present invention, the first supporting means is embodied as and is not limited to, a jig (40), levelling studs (11), and a jig (40) supporting levelling studs
en).
Further in the present invention, the first supporting means comprise a first adjustment means, wherein, the first adjustment means include but is not limited to levelling studs (11), and/or nuts (14) with or without washer.
The present invention proposes a wind turbine foundation (46) for a wind turbine (100) in general and to a wind turbine foundation (46) with effective load spreading capability for a wind turbine (100) in particular.
The present invention provides a wind turbine foundation (46) for a wind turbine (100) which is readily erectable, has effective load spreading capability.
The present invention is practicable with various alternative embodiments of itself and all embodiments provide for varying approaches of installation and are not limited in their capacity to provide for an effective load spreadingTnechanism for a wind turbine (100).

The present invention provides for an effective, readily erectable, efficient, long lasting, and cost-efficient solution for providing a supporting arrangement for a wind turbine (100).
The supporting arrangement is raised on the ground surface where a wind turbine (100) is projected to be erected. The ground surface includes, but is not limited to places like, rough terrains, hills, coastal lands with high velocity wind flows, and mountains.
In another embodiment of the present invention, the supporting arrangement in general and the LSP (19) in particular, provides for adequate supporting, positioning and balance for the wind turbine (100). The LSP (19) as embodied in our present invention generally receives a normally acting load from the wind turbine (100) which is positioned above the LSP (19). The LSP (19) as embodied in the present invention is made of a flat profile material and also the LSP (19) is satisfactorily levelled on the top portion of the supporting arrangement, so that, there is equal clearance from any point on the surface of the LSP (19) to the ground surface. The optimum/ adequate levelling of the LSP (19) is ensured with the help of and is not limited to, Bolt Circle Diameter (BCD) levelling and/or other methods like water tube levelling. Pursuant to the levelling of the LSP (19) and building up the other structural members of the supporting arrangement comprising, anchor bolts (16), levelling studs (11), anchor ring (15), nuts and/or bolts (18), the concrete is poured into the supporting arrangement. It has to be ensured that the poured concrete sufficiently compacts in the supporting arrangement and that there is adequate flatness and clearance between the LSP (19) and the compacted concrete.
Based on the fact that the LSP (19) is required to aid in withstanding the normal load of the wind turbine (100) to the ground surface through the foundation (46) of the wind turbine (100), the LSP (19) is mounted on the top portion of the supporting arrangement so that, the LSP (19) is in contact with the bottom flange

(50) of the tower (55) of the wind turbine (100). The optimum/adequate levelling of the LSP (19) is ensured, so that, all points of the LSP (19) are capable of withstanding substantially equal amount of load from the wind turbine (100). Pursuant to erecting the foundation (46) the wind turbine (100) is normally mounted on the top floor of the LSP (19), the normal load resulting from the weight/ load of the wind turbine (100) passes to the top floor of the LSP (19). Based on the fact that the LSP (19) is optimally/ adequately levelled with respect to the ground surface, and the concrete is adequately compacted underneath the LSP (19), the load is thereby equally distributed throughout the LSP (19) and the ground surface.
Further the normal weight/ load resulting from the weight/ load of the wind turbine (100) passes to the LSP (19), the load is automatically passed on to the concrete foundation (46) underneath the LSP (19) and is there from passed on to the earth/ ground surface.
For those skilled in the art, normal load acting on a surface is a load which acts on the surface perpendicular to the surface. Thus in the present invention, the LSP (19) acts as a load transferring/ distributing member, by transferring/ distributing, substantially the entire load acting on it, to the ground surface through the concrete surface. Since the LSP (19) comprises a flat surface profile, and the concrete is adequately compacted underneath the LSP (19), the entire load acting on the LSP (19) is substantially equal throughout the LSP (19), and this ensures equal distribution of the normal load across the LSP (19). Since the load distribution is equal at all points of the LSP (19), there is equal amount of stress across all points of the LSP (19) and the foundation (46) underneath the LSP (19) also carries equal load distribution.
The distance of the LSP (19) from the anchor ring (15) in the anchor cage (A) is characterized by the depth of the foundation (46) to be formed, which is relative to the load bearing capacity of the foundation (46) and/ or the weight / load of the

wind turbine (100) to be erected on top of the foundation (46) and/ or the LSP (15) embedded in the concrete foundation (46).
The supporting arrangement is filled with concrete and satisfactory compacting of the concrete is ensured. The adequate compacting of the poured concrete is essential for gaining rigidity for the foundation (46) for the wind turbine (100), which is essential for withstanding and/ or distributing and/ or transferring the maximum amount of weight/ load acting on the foundation (46) from the wind turbine (100).
The LSP (19) is in proximity with the concrete with a minimum clearance of 10 to 30 mm, preferably of 20 mm.
The concrete is poured into the supporting arrangement pursuant to erecting all the members of the supporting arrangement in the desired sequence and/or after erecting reinforcement in within the supporting arrangement.
The LSP (19) is connected with the supporting arrangement in a way so as to permit maximum distribution of the load acting on it from the tower (55) into the foundation (46) and into the earth/ ground surface.
The maximum distribution of the load is achieved by, embedding the LSP (19) directly on to the compacted concrete surface of the foundation (46) optionally with placing high strength non shrink or expandable cement grout, so that the compacted concrete helps to distribute the maximum amount of weight/ load from the wind turbine (100) tower and the LSP (19) into the foundation (46) and further into the ground surface.
According to an embodiment of the invention, a supporting arrangement for a wind turbine (100) comprises of an anchor ring (15) which is formed preferably of a flat profile material. The anchor ring (15) contains a plurality of bores (60)

which can be embodied as recesses and/or wholes, arranged along the circumferential portion of the anchor ring (15). The bores (60) are designed to accommodate the longitudinal levelling studs (11). The number of levelling studs (11) is preferably within the range of 6 to 12, preferably 8 to 12.
One embodiment disclosed levelling of the anchor ring (15) by second adjustment means in such that it is done by assembling the anchor ring (15) with the levelling studs (11) and placing them on a ground surface, as shown in figure 5 (a). Pursuant to placing the anchor ring (15) with levelling studs (11) on the ground surface, the levelling of the anchor ring (15) is accomplished by adjusting the levelling studs (11) within the anchor ring (15) and with a BCD level and/ or other methods like water tube level verification. The anchor ring (15) is levelled flat (horizontal) in relation to the ground surface thereby aiding to level all the remaining members which are to be placed in connection with the anchor ring (15) assembly.
Further pursuant to levelling of the anchor ring (15), plurality of anchor bolts (16) are placed successfully within the corresponding recesses (65) in the anchor ring
(15) wherein the recesses can be embodied as wholes and that the anchor bolts
(16) project radially substantially outwards from the corresponding bores (60) of the LSP (11) in the anchor ring (15) as shown in Figure 5 (a). The anchor bolts (16) and the anchor ring (15) are fastened with the help of a plurality of nuts (17) as shown in Figure 5 (a) and Figure 5 (b) and are ensured that the anchor ring (15) along with the plurality of anchor bolts (16) and the plurality of nuts form a rigid framework called as an anchor cage (A).
A plurality of levelling studs (11) is placed through the corresponding (60) in the anchor ring (15). A load spreading plate ('LSP') (19) which is a flat metallic plate used for uniformly distributing a normal load with corresponding (60) for accommodating a plurality of levelling studs (11), is placed in connection with the levelling studs (11) passing through the corresponding bores (60) anchor ring (15)

and is levelled for BCD levelling with optical instruments and/or others methods like water tube levelling. The levelling studs (11) are passing at least partly through the bores (60) in the cross-section of the LSP (19). The anchor bolts (16) are passing through recesses (65) and projecting radially substantially outwards from the LSP (19). The anchor bolts (16) are at least partially passing through the corresponding recesses (65) in the LSP (19). The interface between the levelling studs (11) and the LSP (19) is/ are tightened with a plurality of nuts (14), preferably 8 and not less than 6 and not more than 12 in numbers. The nuts (14) and the levelling studs (11) preferably have internal and/or external threading so as to form a satisfactory fit and levelling for the LSP (19). The nuts (14) and their interface between levelling studs (11) and LSP (19) are satisfactorily tightened and tack welding at relative angle e.g. i.e. of 120° apart is done.
One significant difference between the prior art & the present invention is that, the LSP (19) is partially embedded in the wind turbine foundation (46) i.e., LSP (19) is acting as a part of foundation without any medium of shim plates/levelling plates. This will transfer the total load of the wind turbine (100) though tower (55), flange (50) and/or LSP (19) to the wind turbine foundation (46) efficiently as there is no medium of shim plates/levelling plates for load transfer from LSP (19) to wind turbine foundation (46). The load from the LSP (19) is transferred to foundation with or without placing high strength non - shrink or expandable cement grout as shown in figures 2 a and 2 b.
In another embodiment of the present invention, as shown in Figure 5 (b), second adjustment means for levelling said anchor ring (15) are formed by a plurality of levelling jigs (40) make the positioning of the anchor ring (15) from the ground surface, instead of the levelling screws (11) which were placed directly with the ground surface and the anchor ring (15). The anchor ring (15) here is directly in connection with the levelling jigs (40) which are preferably 8 in number. The levelling of the anchor ring (15) is done with respect to the ground surface and the

levelling jigs (40). The levelling is achieved with the help of BCD levelling and/or other methods like water tube levelling.
The anchor bolts (16), the LSP (19), the levelling studs (11) connecting the anchor ring (15) and the LSP (19) are all embodied as the same as in the first embodiment of the present invention. The supporting arrangement forms a rigid framework called as the anchor cage (A) which is later poured with concrete and the concrete is sufficiently compacted. Since the LSP (19) is embodied to perform equal load distribution across the wind turbine (100) foundation (46), the normal load coming from the wind turbine (100) to the LSP (19) is passed on into the ground surface via the foundation (46) of the wind turbine (100).
The levelling jig (40) as shown in Figure 4 is a member of the supporting arrangement, used for locating and/ or levelling the anchor ring (15). The locating and levelling is accomplished directly with the help of levelling jig (40) or with the help of levelling studs (11) which are in connection with the levelling jigs (40).
In yet another embodiment of the present invention, as shown in Figure 3 (a) there are pluralities of levelling jigs (40) with corresponding number of levelling studs (11) which are fixed within the holes of the levelling jigs (40), and are in connection with the anchor ring (15). The levelling jigs (40) along with the corresponding number of levelling studs (11) are used to satisfactorily level the anchor ring (15) to a satisfactory horizontal and/ or vertical position for BCD levelling with optical instruments and/or other methods like water tube levelling.
The anchor bolts (16), the levelling studs (11) corresponding to the anchor ring (15) and the LSP (19) are all embodied in the same manner in relation to the anchor ring (15) as in our first embodiment of the present invention. The supporting arrangement comprising the levelling jigs (40) with the levelling studs (11) connected and levelled in relation to the anchor ring (15); the anchor bolts

(16) which are connected to and fastened and/ or tightened with the LSP (19) and the anchor ring (15); and the levelling studs (11) which are used for connecting the LSP (19) with the anchor ring (15), and also for levelling the LSP (19) in relation to the anchor ring (15) and/ or the foundation (46) and/ or the ground surface, form a tight and/ or rigid framework called as the anchor cage (A).

1/ We Claim:
1. A support arrangement for a tower (55) of a wind turbine (100) comprising:
a. a load-spreading plate ('LSP') (19) for supporting a bottom flange of
the tower of the wind turbine (100) while the LSP (19) is supported by
and located on a body of a foundation (46);
b. an anchor ring (15) while the anchor ring (15) is placed within the body
of the foundation (46);
c. a plurality of anchor bolts (16) for mounting the tower (55) onto the
LSP (19) connected to the anchor ring (15) and reaching at least partly
through corresponding recesses (65) in the LSP (19);
d. a plurality of levelling studs (11) being connected with the anchor ring
(15) and supporting the LSP (19) with supporting means during
manufacturing process of the support arrangement when the foundation
(46) body isn't formed, i.e. when concrete work not yet done, and/or
concrete not set; and
characterized by
i. the anchor bolts (16) are embodied in such that they cannot carry the LSP (19) and/or are not equipped with supporting means like a nut for supporting the LSP (19); and
ii. the levelling studs (11) comprise first adjustment means for adjusting the position of the supporting means in such that a position of the LSP (19) in direction of an longitudinal axis of the tower (55) of the wind turbine (100) can be adjusted before forming the foundation (46) body.
2. The supporting arrangement as claimed in claim 1, wherein, the number of
said levelling studs (11) and of first adjustment means are at least 8,
preferably 6.

3. The supporting arrangement as claimed in claim 1 or 2, wherein, the number of said levelling studs (11) and of first adjustment means are not more than 12, preferably not more than 10.
4. The supporting arrangement as claimed in claim 2 or 3, wherein, said first adjustment means comprises:
a. at least a nut (14); and
b. at least a levelling stud with thread (11).
5. The supporting arrangement as claimed in claim 4, wherein, said nut (14) and said levelling stud with thread (11) are used for levelling said LSP (19) to a horizontal position.
6. The supporting arrangement as claimed in claim 5, wherein, said nut and said levelling stud (11) are welded after attaining levelling to a horizontal position.
7. The supporting arrangement as claimed in any one of the claims 1 to 7, comprising second supporting means for supporting the anchor ring (15) in a pit for the foundation (46) before forming the foundation (46) and a second adjustment means for levelling said anchor ring (15) before forming the foundation (46) body.
8. The supporting arrangement as claimed in claim 7, wherein the second supporting means are embodied as a jig (40) and the second adjustment means are embodied on the jig (40).
9. The supporting arrangement as claimed in claim 8, wherein the levelling studs (11) are embodied as second supporting means and are comprising the second adjustment means.

10. The supporting arrangement as claimed in claim 8, wherein the wherein the second supporting means are embodied as a jig (40) supporting the levelling studs (11) and the levelling studs (11) comprising the second adjustment means.
11. The supporting arrangement as claimed in claim 8, 9 or 10, wherein the second adjustment means are comprising:
a. at least a nut (12); and
b. at least a levelling stud (11).
12. A method of constructing a foundation for a wind turbine (100) comprising
steps of:
a. placing at least one second supporting means, at least an anchor ring
(15) with anchor bolts (16), levelling studs (11) with first levelling
means, and a LSP (19) of a supporting arrangement for a wind turbine
(100) in a pit for a foundation (46), while the LSP (19) is carried by
supporting means of the levelling studs (11), wherein the LSP (19) is
not carried by the anchor bolts (16);
b. levelling the LSP (19) by the first levelling means of the levelling studs
(11); and
c. concreting and/or reinforced concreting.
13. The method as claimed in claim 12, wherein an additional high strength non-shrink cement grout mortar is put below the LSP(19), preferably of a minimum thickness 60 mm.
14. The method as claimed in claim 12 or 13, wherein, the anchor bolts (16) are connected with the anchor ring (15) to form a rigid network called an anchor cage (A), while the anchor cage (A) is leveled with said second supporting means.

15. The method as claimed in claim 14, wherein, the anchor cage (A) is leveled with help of water tube level and/or BCD level and/or auto level.
16. The method as claimed in any one of the claims 12 - 14, wherein, said levelling studs (11) with first levelling means are connected through corresponding recesses (65) in the anchor ring (15) and/or said anchor cage (A), and said LSP (19) is connected with said supporting means of the leveling studs (11), and said LSP (19) is satisfactorily leveled with the help of said first leveling means of said supporting means, and the first leveling means along with said LSP (19) are welded at relative angles of preferably 120° apart from each other.
17. The method as claimed in any one of the claims 12 - 14, wherein, said foundation (46) is embedded with reinforcement and/or poured with concrete, wherein said reinforcement and/or said concrete is compacted to avoid voids.
18. The method as claimed in claim 16, wherein, a clearance of at least up to 20 mm preferably 10 mm is maintained between the top surface of said LSP (19) and top surface of said reinforcement and/or said concrete.