Re-use of immersed tunnels

Re-use of immersed tunnels: An innovative method for recovering, regenerating and reusing immersed tunnels by temporarily re-floating

de Jong, Arne (TU Delft Civil Engineering and Geosciences; TU Delft Hydraulic Engineering; TU Delft Hydraulic Structures and Flood Risk; Royal HaskoningDHV)

Voorendt, Mark (mentor)
Jonkman, Sebastiaan N. (graduation committee)
Houwing, Erik-Jan (graduation committee)
't Hart, Marcel (graduation committee)

Delft University of Technology

Civil Engineering | Hydraulic Engineering

2020-06-08

Immersed tunnels, located in waterways, could be a limiting factor in the dredging in waterways. This dredging is required since cargo vessels draught increased the past decades. In this thesis a new method is defined for temporarily, effectively, re-floating immersed tunnels. With this method extra risks arise, for these risks’ measures are given. The validity of this method is proven by applying the method a relevant case study. This case tunnel is the Wijkertunnel, consisting of six elements and a total immersed length of 600 meters. It showed that the maximum deepening available is 6.60 meters. It is concluded that the impact of the risk measures is limited. Finally other immersed tunnels are compared to the Wijkertunnel. For these tunnels the different types are described, and the impact of these differences are discussed. It showed that for all the immersed tunnels the method is viable, except for immersed tunnels with a very few elements.

Immersed tunnels
tunnels
Re-use
Refloating
Wijkertunnel
Deepening
Circular design

http://resolver.tudelft.nl/uuid:f686e506-6980-484a-aac6-012fcf39cee3

52.4576445,4.6684549

Student theses

master thesis

© 2020 Arne de Jong