Pile guide

1. A pile guide for supporting a pile as it is driven into a substrate, comprising:

a base frame; and

a pile guide member which is mounted on the base frame and defines a passageway with an inner peripheral surface to which a plurality of elongate members are attached, the plurality of elongate members being configured to engage a pile and guide it in a predetermined direction through the passageway as it is driven into a substrate, wherein at least one elongate member and the inner peripheral surface of the passageway have releasable inter-connecting profiles for releasably attaching the at least one elongate member to the inner peripheral surface, with the interconnecting profiles including a hook portion and a corresponding loop portion for receiving the hook portion, and with the hook portion and corresponding loop portion orientated such that movement of a pile through the passageway into a substrate beneath the base frame urges the hook portion to remain interconnected with the corresponding loop portion.

2. A pile guide according to claim 1 , in which the corresponding loop portion is formed in part by a pair of support members defining a channel therebetween for receiving the at least one elongate member.

3. A pile guide according to claim 1 , in which the at least one elongate member and the peripheral surface of the passageway further comprise interengaging profiles, spaced from the interconnecting profiles, which are configured to support the at least one elongate member when attached to the inner peripheral surface of the passageway.

4. A pile guide according to claim 1 , further comprising a releasable lock mechanism for locking the at least one elongate member to the inner peripheral surface of the passageway once the interconnecting profiles are interconnected.

5. A pile guide according to claim 4 , in which the releasable locking mechanism comprises a bolt which in use extends transversely through the at least one elongate member.

6. A method of adjusting a pile guide, comprising:

providing a pile guide comprising: a base frame; and a pile guide member which is mounted on the base frame and defines a passageway with an inner peripheral surface to which a plurality of elongate members are attached, the plurality of elongate members being configured to engage a pile and guide it in a predetermined direction through the passageway as it is driven into a substrate, with at least one elongate member and the inner peripheral surface of the passageway having releasable inter-connecting profiles for releasably attaching the at least one elongate member to the inner peripheral surface, with the interconnecting profiles including a hook portion and a corresponding loop portion for receiving the hook portion, and a with the hook portion and corresponding loop portion orientated such that movement of a pile through the passageway into a substrate beneath the base frame urges the hook portion to remain interconnected with the corresponding loop portion;

removing the at least one elongate member by disconnecting the interconnecting profiles;

providing at least one other elongate member with substantially the same interconnecting profile as the at least one elongate member, but which is configured to project a different amount into the passageway when interconnected to the corresponding profile on the inner peripheral surface of the passageway; and

attaching the at least one other elongate member to the inner peripheral surface by interconnecting their respective profiles.

7. A pile guide for supporting a pile as it is driven into a substrate, comprising:

a base frame; and

a pile guide member for guiding a pile as it is driven into a substrate when the base frame is resting thereon, the pile guide member comprising two parts each moveable between an operative position and an inoperative position, each part being pivotally mounted on the base frame by a support member for rotation about a respective first pivot axis;

wherein each part of the pile guide member is pivotally coupled to its support member for rotation about a respective second pivot axis which is spaced from the respective first pivot axis.

8. A pile guide according to claim 7 , in which at least one part is moveable relative to the base frame from a substantially vertical orientation, when the pile guide member is in its operative position, to a substantially horizontal orientation following combined rotations through a first angle about the first pivot axis and a second angle about the second pivot axis.

9. A pile guide according to claim 7 , in which at least one part is configured to rotate under gravity about the respective second pivot axis into an intervening position relative to its support member, when the pile guide member is released from its operative position.

10. A pile guide according to claim 9 , in which said at least one part and its support member are configured to rotate under gravity about the respective first pivot axis only when said at least one part reaches the intervening position relative to its support member.

11. A pile guide according to claim 10 , in which said at least one part and its support member have a combined centre of mass which is configured to move from one lateral side of the respective first pivot axis to an opposing lateral side as the said at least one part rotates about the respective second pivot axis from its operative position to the intervening position.

12. A pile guide according to claim 7 , further comprising a mechanism for restoring parts of the pile guide member to the operative position from the inoperative position.

13. A pile guide according to claim 12 , in which the mechanism is configured to drive movement of the parts of the pile guide member from the inoperative position to the operative position only.

14. A pile guide according to claim 12 , in which the mechanism comprises a variable length strut or piston pivotally coupled between the base frame and the support member of one part for rotating that support member about its first pivot axis.

15. A pile guide according to claim 12 , in which the mechanism comprises a variable length strut or piston pivotally coupled between one part and its support member for rotating that one part about its second pivot axis.

16. A pile guide according to claim 7 , wherein each support member is mounted on the base frame via a mounting arrangement configured to vary displacement and/or orientation of each respective first pivot axis relative to a substrate-engaging surface of the base frame.

17. A pile guide according to claim 16 , wherein at least one mounting arrangement may comprise a pair of couplings spaced along the respective first pivot axis, with at least one of the pair of couplings being displaceable relative to the substrate-engaging surface of the base frame in a direction perpendicular thereto.

18. A pile guide for supporting a pile as it is driven into a substrate, comprising:

a base frame; and

a pile guide member which is mounted on the base frame and defines a passageway with a substantially cylindrical inner peripheral surface to which a plurality of elongate members are attached, the plurality of elongate members being aligned parallel to a longitudinal axis of the substantially cylindrical inner peripheral surface and circumferentially spaced around the inner peripheral surface and configured to engage a pile and guide it in a predetermined direction through the passageway as it is driven into a substrate, wherein at least one elongate member and the inner peripheral surface of the passageway have releasable inter-connecting profiles for releasably attaching the at least one elongate member to the inner peripheral surface.

19. A pile guide according to claim 18 , wherein the at least one elongate member has a tapered leading end to assist with aligning a pile with the passageway as the pile is introduced into the pile guide member.