Method of installing a pile by means of a pile guide
In a method of installing a pile in the sea bottom by means of a pile guide which has a frame and at least an upper and a lower pair of cooperating guide members, wherein the upper pair and the lower pair are located at a distance from each other in vertical direction. Each pair of guide members comprises a passive guide member and an active guide member. The passive guide members are moved to respective fixed initial guiding positions with respect to the frame and the active guide members are moved to the pile until the passive and the active guide members engage the pile, after which the pile is hold between the upper pair of guide members and between the lower pair of guide members during driving the pile into the sea bottom, during which the actual forces between the pile and the respective guide members are determined.
1. A method of installing a pile in the sea bottom by means of a pile guide having a frame and at least an upper and a lower pair of cooperating guide members, wherein the upper pair and the lower pair are located at a distance from each other in a vertical direction, wherein each pair of guide members comprises a passive guide member and an active guide member, the method comprising:
moving each of the passive guide members and the active guide members towards the pile (P) after placing the pile between each of the pairs of guide members, wherein the passive guide members are moved to respective fixed initial guiding positions with respect to the frame and the active guide members are moved to the pile until the passive and the active guide members engage the pile;
driving the pile into the sea bottom while holding the pile between the upper pair of guide members and between the lower pair of guide members;
measuring actual forces between the pile and the respective guide members during driving the pile into the sea bottom;
moving the active guide member of a first of the pairs of guide members in a direction away from the pile without moving the passive guide member of the first pair relative to the pile when the actual forces at both the passive and active guide member of the first pair of guide members increase during driving the pile into the sea bottom; and
moving the passive guide member of the first pair in a direction away from the pile if the actual force at the passive guide member of the first pair remains above a certain level without an increase of the actual force at the active member of the first pair during driving the pile into the sea bottom.
2. The method according to claim 1 , wherein the guide members are operated hydraulically.
3. The method according to claim 1 , wherein locations where resultant forces of the guide members engage the pile lie in a common plane.
4. The method according to claim 1 , wherein the passive guide members of both pairs of guide members are located at the same side of the centerline of the pile.
5. The method according to claim 1 , wherein the pair of upper guide members form a first pair of upper guide members, wherein a second, similar pair of upper guide members are located in a plane perpendicular to the common plane, and wherein the pair of lower guide members form a first pair of lower guide members, wherein a second, similar pair of lower guide members are located in a plane perpendicular to the common plane.
6. The method according to claim 1 , wherein after placing the pile between each of the pairs of guide members, first the passive guide members are moved to respective fixed initial guiding positions with respect to the frame and subsequently the active guide members are moved to the pile until the passive and the active guide members engage the pile.
7. A method of installing a pile in the sea bottom by means of a pile guide having a frame and at least an upper and a lower pair of cooperating guide members, wherein the upper pair and the lower pair are located at a distance from each other in a vertical direction, wherein each pair of guide members comprises a passive guide member and an active guide member, the method comprising:
moving each of the passive guide members and the active guide members towards the pile (P) after placing the pile between each of the pairs of guide members, wherein the passive guide members are moved to respective fixed initial guiding positions with respect to the frame and the active guide members are moved to the pile until the passive and the active guide members engage the pile;
driving the pile into the sea bottom while holding the pile between the upper pair of guide members and between the lower pair of guide members;
measuring actual forces between the pile and the respective guide members during driving the pile into the sea bottom; and
locking at least two of the guide members in their positions relative to the pile during driving the pile into the sea bottom if the actual force at one of the guide members of the upper pair and an opposite actual force at one of the guide members of the lower pair both increase and the actual forces at the remaining guide members do not increase.
8. The method according to claim 7 , wherein the guide members are operated hydraulically.
9. The method according to claim 7 , wherein locations where resultant forces of the guide members engage the pile lie in a common plane.
10. The method according to claim 7 , wherein the passive guide members of both pairs of guide members are located at the same side of the centerline of the pile.
11. The method according to claim 7 , wherein the pair of upper guide members form a first pair of upper guide members, wherein a second, similar pair of upper guide members are located in a plane perpendicular to the common plane, and wherein the pair of lower guide members form a first pair of lower guide members, wherein a second, similar pair of lower guide members are located in a plane perpendicular to the common plane.
12. The method according to claim 7 , wherein after placing the pile between each of the pairs of guide members, first the passive guide members are moved to respective fixed initial guiding positions with respect to the frame and subsequently the active guide members are moved to the pile until the passive and the active guide members engage the pile.
13. A method of installing a pile in the sea bottom by means of a pile guide having a frame and at least an upper and a lower pair of cooperating guide members, wherein the upper pair and the lower pair are located at a distance from each other in a vertical direction, wherein each pair of guide members comprises a passive guide member and an active guide member, the method comprising:
moving each of the passive guide members and the active guide members towards the pile (P) after placing the pile between each of the pairs of guide members, wherein the passive guide members are moved to respective fixed initial guiding positions with respect to the frame and the active guide members are moved to the pile until the passive and the active guide members engage the pile;
driving the pile into the sea bottom while holding the pile between the upper pair of guide members and between the lower pair of guide members;
measuring actual forces between the pile and the respective guide members during driving the pile into the sea bottom;
moving the active guide member of a first of the pairs of guide members in the direction of the pile when the actual force at the active guide member of the first pair decreases during driving the pile into the sea bottom;
moving the active guide member of the first pair in the direction of the pile when the actual force at the passive guide member of the first pair decreases during driving the pile into the sea bottom; and
moving the passive guide member of the first pair in the direction of the pile when the actual force at the passive guide member of the first pair remains below a predetermined level after moving the active guide member of the first pair in the direction of the pile.
14. The method according to claim 13 , wherein the guide members are operated hydraulically.
15. The method according to claim 13 , wherein locations where resultant forces of the guide members engage the pile lie in a common plane.
16. The method according to claim 13 , wherein the passive guide members of both pairs of guide members are located at the same side of the centerline of the pile.
17. The method according to claim 13 , wherein the pair of upper guide members form a first pair of upper guide members, wherein a second, similar pair of upper guide members are located in a plane perpendicular to the common plane, and wherein the pair of lower guide members form a first pair of lower guide members, wherein a second, similar pair of lower guide members are located in a plane perpendicular to the common plane.
18. The method according to claim 13 , wherein after placing the pile between each of the pairs of guide members, first the passive guide members are moved to respective fixed initial guiding positions with respect to the frame and subsequently the active guide members are moved to the pile until the passive and the active guide members engage the pile.