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Abstract: Accidental loads on Immersed tunnels : Regular loads on immersed tunnels are most of the time straight forward. The dominant loads are mainly permanent and specified by soil, water and self-weight. Next to the permanent loads, variable loads will act on the tunnel. Regular variable loads are defined by traffic, temperature and tidal water differences. In nowadays design the awareness on...
Abstract: Recent trends show that the decision-making process in tunnel construction is changing. New developments in technology and requirements make the selection between immersed and bored tunnelling change. Where in past the selection was mainly driving from a cost perspective new techniques resulted in more economical designs. With now more stakeholders and public interests influencing the selection...
Abstract: To minimize hindrance on the navigation during the construction of the Maas-Delta-Tunnel (Blankenburg connection, Rotterdam, the Netherlands), the length of the immersed tunnel was shortened to merely two elements and by this very deep cut-and-cover sections needed to be constructed. A stringent execution sequence, whereby uplift safety in every stage was guaranteed, led to feasible lengths of...
Abstract: Traditionally long span bridges are applied for river crossings and often in delta areas and in soft soil conditions. As an alternative to a bridge, in countries like the US, Japan and the Netherlands many of these fixed links have been constructed as a tunnel with the immersed tunnel technique. In these countries this technique is quite mature and common practice. However, over the past years...