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List of products by author: T. Hellström
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Passage under Lövstavägen at Bypass Stockholm – From Design to Realization
Abstract: The passage under Lövstavägen within the Stockholm Bypass Project has been the first real critical and sensitive area excavated during the construction phase of this important project. In this area, two access ramp tunnels pass under the fourlane road named Lövstavägen. Above the tunnel crown, 7-10 m of soil and no rock cover had been verified by several investigations. From the top down, the...
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Redesign of the rock support, in the bus ramps of Stockholm bypass, due to changing geology
Abstract: The Stockholm bypass is a 21 km long motorway west of Stockholm, Sweden. This paper presents the challenge due to unpredicted geological conditions during ongoing construction. The weakness zones containing graphite and clay were found to be more prominent and more unfavorable than predicted during the design. During the construction of the pre-cut the weakness zones were observed to strike...
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