Increasing Load-Out Capacity - Comparison of Skidding Methods
Lehtonen, Taneli (2013)
Satakunnan ammattikorkeakoulu
2013
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201304154394
https://urn.fi/URN:NBN:fi:amk-201304154394
Tiivistelmä
The purpose of this thesis was to investigate and compare alternative methods to execute skidded load-out of an extremely heavy structure onto a transport vessel.
In typical load-out the structure is skidded along two skidding tracks onto the deck of the transport vessel. However, the bearing capacity of the foundations under the skidding tracks on shore as well as the capacity of the transport vessel is evaluated to require using additional track lines, total of four track lines, to spread the load if the skidded structure is extremely heavy. The additional skidding tracks have not been required in previous projects, however in the future the need of the additional tracks is believed to be inevitable. Therefore evaluation concerning potential skidding me-thods for the additional tracks was required.
The methods for the study were selected based on the friction reducing principles. The principles were rollers, teflon pads and air cushions. When evaluating the methods emphasis was put on feasibility, friction and load bearing capacity. In the background, survey concerning the costs of the most potential methods was also made. However, the results are excluded from the thesis for confidentially reasons.
The methods found most potential for usage on the additional skidding tracks were the air pad skidding system from Hebetec Engineering Ltd. and the skidding system using teflon pads from Mammoet B.V.
In typical load-out the structure is skidded along two skidding tracks onto the deck of the transport vessel. However, the bearing capacity of the foundations under the skidding tracks on shore as well as the capacity of the transport vessel is evaluated to require using additional track lines, total of four track lines, to spread the load if the skidded structure is extremely heavy. The additional skidding tracks have not been required in previous projects, however in the future the need of the additional tracks is believed to be inevitable. Therefore evaluation concerning potential skidding me-thods for the additional tracks was required.
The methods for the study were selected based on the friction reducing principles. The principles were rollers, teflon pads and air cushions. When evaluating the methods emphasis was put on feasibility, friction and load bearing capacity. In the background, survey concerning the costs of the most potential methods was also made. However, the results are excluded from the thesis for confidentially reasons.
The methods found most potential for usage on the additional skidding tracks were the air pad skidding system from Hebetec Engineering Ltd. and the skidding system using teflon pads from Mammoet B.V.