1979•Tunnels & tunnellingRequires access
DESIGNING IMMERSED TUNNELS
Aurélie Glerum
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Abstract
The article examines the factors which influence the design and construction of immersed tunnels in the Netherlands. Factors considered include alternative routes, nature of soil and varying width of river or waterway. A final choice should also take into account investment needed and road network layout. It is necessary to determine expected traffic volume and draught of ships using the waterway. Construction methods considered in the article include open excavation, shield-driving and immersed-tube techniques. Other aspects of tunnel construction considered are lighting and ventilation equipment, pumps and traffic signal equipment. /TRRL/