Deepwater foundations used in Malaysia, Types of Deepwater Foundations Types of Deepwater Foundation Accessories Pile Design Geotechnical Soil Investigation
The design calculation sheets for seafastening of a suction pile for subsea installationsFull description
Full description
Deskripsi lengkap
Full description
Suction PumpDeskripsi lengkap
Deskripsi lengkap
suction pumpDeskripsi lengkap
alat suctionFull description
Full description
Deskripsi lengkap
hjgfrtseraersko';oDeskripsi lengkap
edu
Makalah suction
Suction PumpDeskripsi lengkap
OE4624 Suction Piles section
sop pemberian suctionFull description
modl sction
The approach for sand soils differs from the approach for clay soils, because the different behaviour of both materials. Therefore some parts are treated separately for sand and clay in the sections below. -Installation -Operation -Recovery
Overview of installation equipment (Offshore Soil echanics!
The operation requirements depend on whether the use of the suction pile, as foundation of moorin" and vertically or hori#ontally. This also determines the anchor line attachment point, the pad-eye. $or vertical load this pad-eye is fi%ed on the top plate, for loads under an an"le the pad-eye is attached at &' from the lower end of the pile. Typical (tensile! forces on the top plate vary from &)) to *+) ton. The three main failure mechanisms are •
Shaft failure
This type of failure appears when the friction forces alon" the caissons sirts fails under the tensile forces on the top plate. This happened in case of pure vertical tension and usually tears out a plu" of soil alon" with the caisson itself.
•
Translation failure
Translation failure occurs when the caisson is pulled sideways, due to which a soil plu" can fail on the pulled side of the caisson and even a tension crac can occur at the bacside of the caisson.
•
Rotation failure
In this case, the pad-eye is not at its optimal position for the applied load (under an an"le!. This offset creates a moment, which in case in failure can not be restored by the soil around the caisson.
•
of the latter two failure modes can also occur, i.e. translation and rotation failure.
Combination
Recovery is done by lowerin" the pump onto the caisson it by means of docin" cones and attachin" onto the caisson with hydraulic latch pins. The installation process described above is then simply reversed, pushin" the caisson out. The
friction for sand soils is however hi"her due to the reversed water flow, but one can e%ert additional tensile force to recover the caisson. The caisson is hoisted bac on to the installation vessel, ready for re-employment/ Suction caisson with pump attached (www.suctionpile.com!
