Adamselv Trench Adamselv Pumphouse Adamselv Penstock Bouyancy amelioration Pipe in trench Pipe ready for spraying Our mould experiment Norwegian trench conditions DN900 pipes in storage Identical failure modes Proof of predictable failure Destruction testing Proof that soil shear is the answer Preparing for soil shear tests Making foam blanks PU components Perfect foam Perfect foam Imitating trench conditions Our first tests How foam looks to the pipe Our first experiments When foam is better …