GUIDELINES
FOR
MARINE
LIFTING
&
LOWERING
OPERATIONS
0027/ND Rev 11
Page 74 of 84
19.9.3
Pile driving loads in the pile guide frame shall be calculated to ensure that the frame has adequate
capacity under all loading conditions including accidental and lateral loads.
19.9.4
A system to monitor the verticality of the anchor pile during driving should be provided. This can be a
visual system such as a calibrated bull’s-eye indicator.
19.9.5
On bottom stability of the guide frame shall be calculated based on the maximum inclination due to the
seabed bathymetry with and without the pile hammer string. The mudmat shall be designed to ensure
stability of the guide-frame and verticality of the anchor pile and pile hammer combination.
19.9.6
Pile driveability analyses shall be provided to ensure that the pile
can be driven to the target
penetration with the chosen pile hammer.
19.9.7
The self-penetration of the pile should be estimated prior to the installation
operations and compared to
the actual value. This can provide information on the actual soil strength.
If a large variation occurs
the pile design should be re-evaluated.
Dostları ilə paylaş: