System for forming a wind turbine foundation
A method of forming a wind turbine foundation includes providing an anchor cage in an excavation pit, the anchor cage including an upper flange, a lower flange, and a plurality of anchor bolts extending therebetween. A first cementitious material is directed into the excavation pit so that the anchor cage becomes at least partially embedded in the material, which is allowed to cure to form a rigid body. A connecting element is selectively engaged with the upper flange and an actuating element is positioned in operative relation with the connecting element, the connecting and actuating elements positioned in non-contact relation with the anchor bolts. The actuating element is actuated relative to the connecting element to raise the upper flange from the rigid body into a leveled position. A second cementitious material is directed into a space beneath the raised upper flange and is allowed to cure to form a support layer.
1. A system for forming a wind turbine foundation, comprising:
an anchor cage including an upper flange, a lower flange, and a plurality of anchor bolts extending between the upper and lower flanges, the upper flange configured to engage a lower portion of a wind turbine; and
at least one leveling apparatus, comprising:
a leveling plate having an upper plate portion and at least one side plate portion depending from the upper plate portion, wherein a lower surface of the at least one side plate portion defines a leveled position of the upper flange when the upper flange is engaged with the lower surface of the at least one side plate portion;
a connecting element engageable with the leveling plate and the upper flange; and
an actuating element operatively associated with the connecting element,
whereby the at least one leveling apparatus is operated to raise the upper flange to the leveled position, including engaging the connecting element with the leveling plate and the upper flange, actuating the actuating element relative to the connecting element without contacting the anchor bolts with the actuating element, and engaging the upper flange with the lower surface of the at least one side plate portion of the leveling plate.
2. The system according to claim 1 , wherein the actuating element is rotatable relative to the connecting element for raising the upper flange to the leveled position.
3. The system according to claim 2 , wherein the connecting element includes a threaded rod and the actuating element includes a nut.
4. The system according to claim 1 , wherein the at least one leveling apparatus includes a plurality of leveling apparatuses, and the upper flange includes a plurality of fastening elements that each engage a respective one of the connecting elements for raising the upper flange to the leveled position.
5. The system according to claim 4 , wherein the plurality of fastening elements include threaded bores, and the connecting element of each leveling apparatus is configured to threadedly engage a respective one of the threaded bores.
6. The system according to claim 1 , wherein the upper flange includes a plurality of bores through which a cementitious material is directed into a space beneath the upper flange.
7. The system according to claim 6 , further comprising:
a material delivery device that directs the cementitious material into the space beneath the upper flange, the material delivery device including a stem that engages at least one of the plurality of bores for directing the cementitious material therethrough.
8. The system according to claim 1 , wherein the upper plate portion of the leveling plate includes first and second through bores for receiving respective upper ends of a pair of the anchor bolts therethrough, and a third through bore for receiving the connecting element therethrough.
9. The system according to claim 8 , wherein the third through bore is radially offset from the first and second through bores when the leveling plate is supported by the pair of anchor bolts.