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List of products by author: M. Roslin
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A comparative study of the biomechanical load s during installationof rock bolts in tunnels
Abstract: Installation of rock bolts is a common technique to support the rock mass in tunnels and caverns. The bolting is usually performed with fully grouted conventional steel rebars. The weight of the steel in combination with a manual installation may imply a risk from a working environment perspective. Glass fiber-reinforced polymer (GFPR) bolts have a lower weight and could therefore be beneficial...
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Expansion of the Stockholm metro Case study of the passage of a fracture zone
Abstract: This paper describes the passage of the Birkavägen fracture zone during the excavation of an access tunnel for the expansion of the Stockholm metro to Nacka. The projects main challenges included requirements to limit ground water inflow and passing the fracture zone area, with a combination of low rock cover and densely fractured rock mass. The tunnel was excavated using drill and blast...
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Implementation of 3D-models as construction document for the building contracts
Abstract: The project Stockholm Bypass is located west of Stockholm city center to decrease the north-south road traffic through Stockholm and linking together and develop the external and regional cores. The bypass consists of more than 50 km of rock tunnels which will be constructed by using the method of drill and blast. As well of the means of this large scale and complex project and the overall...
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Inner lining concept for the Stockholm Bypass
Abstract: The Stockholm bypass will be situated west of Stockholm city center to decrease the north-south road traffic through Stockholm. The bypass consists of more than 50 km of rock tunnels which will be cement grouted to fulfill the ingress demands. In addition to the grouting an inner lining will be installed to protect from ice formations, which in cold countries are common in...
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Load capacity of inner lining systems due to impact from falling rocks
Abstract: Inner lining systems in tunnels is a method to prevent water ingress in the traffic area. The method is commonly used in countries with cold climate and is often combined with a conventional near-rock strengthening. Although many established inner lining systems exist, challenges still re- main to find the optimal solution considering function, maintenance and investment cost. In e.g. Norway,...
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Strategy for the permanent technical solution under the Lake Mälaren in the Stockholm Bypass Project
Abstract: The tunnels in the Stockholm Bypass Project connect the northern and southern part of this Nordic city passing through several regional fault zones and subsea passages. For instance, the passage under the Lake Mälaren, Sweden’s third-largest freshwater lake, and the regional fault zone in the Fiskar fjord constitutes one of the most challenging parts in this project. The uncertainties in this...
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