On the Pre-Lay trench tool design

On the Pre-Lay trench tool design

Dirven, S.K.A.

van Rhee, C. (mentor)
Miedema, S.A. (mentor)
Romeijn, A. (mentor)
Jaspers, J. (mentor)

Mechanical, Maritime and Materials Engineering

Marine and Transport Technology

Offshore and Dredging Engineering

2016-10-11

The significant growth in offshore wind activities in boulder clay areas requires suitable cable protection solutions. It is desirable to create a trench prior installation of the cable in order to guarantee the target depth of burial. Modern equipment of available on the market can be refined in order to create a reduced footprint, both economical and environmental. For this thesis there is looked into an innovative solution to create a pre-trench by utilization of a classic dredging vessel. Several alternatives are investigated. However, eventually two different mechanical cutting methods were selected for detailed investigation as a consequence of a multi criterion analysis. One uses counter rotating shredders and the other concept consists of an inclined screw conveyor. After physical considerations it turns out the screw conveyor has the best potential and is therefore subjected to a detailed design.

trenching
backfilling
cutting
cohesion
adhesion
concept
design
offshore wind
multi criterion analysis
pre-lay
post-lay
clay
boulders

http://resolver.tudelft.nl/uuid:901ab4b1-373e-4fc2-8148-f503259f1c9f

Student theses

master thesis

(c) 2016 Dirven, S.K.A.