Medway Tunnel

medway33
(Kent)Rochester, United Kingdom
Twin tube tunnel with 2 lanes + hard shoulder in each tube. 25m wide by 9.15m deep box. Three tunnel elements built in an on-line casting basin.
Additional pictures
medway21units-10medway38
Rochester Bridge Trust/Medway County Council
Rendel Palmer & Tritton + Travers Morgan & Ptnrs
Mott MacDonald Ltd.
126m/118m
370m
18.65m
3
2x2
9.15m
25m
First design & construct contract in the UK. The tunnel is designed to withstand possible uplift from water pressures in an underlying chalk layer.
A graving dock for the elements was built at the eastern portal on the line of the tunnel. On completion of the elements, the graving dock was opened and elements removed and placed. The final element was sealed in the opening of the dock.The approach st