Tallinn-Helsingi tunneli Eesti poolse portaali kombainläbindamise tehnoloogia [Bakalaureusetöö. Juhendaja: T. Tomberg]

Between Tallinn and Helsinki, approximately 7.5 million passengers, a million passenger cars and a quarter of a million trucks are moving each year. Approximately, 30 000 people from Estonia travel to Finland each week to work, which illustrates tight connection between the two cities. The Helsinki-Tallinn Railway Tunnel is a development vision for Finland and the Estonia aimed at reducing the time spent driving, increasing mobility and increasing the competitiveness of the region (Sweco, 2015). This BSc thesis focuses on development of the Estonian side portal for the Tallinn-Helsinki Tunnel. Main topic of this thesis is selection of optimal technology and equipment for tunnel construction. The aim of this work is to select and elaborate primary tunnelling technology, selection of optimal equipment for tunnel construction. The work takes into account the parallel construction of two railway tunnels and one service tunnel from the sandstones of Tiskre to the crystalline basement. This thesis is based on the geological data of the selected road corridor, it provides theoretical overview of tunnel-constructing technology with roadheaders. It provides an overview of the excavation parameters for each larger geological unit. The thesis also approximates the cost of construction of the Estonian side of tunnel portal. It estimates the time for the excavation with roadheaders and other tunnel construction procceses.