9 April 2021, 11:02
Stockholm Norvik Port has won the Årets Bygge 2021, the prestigious and most important prize in the Swedish public construction sector in the Infrastructure category and was also announced the 2021 overall winner. The prize has been awarded in March by the construction sector magazine, Byggindustrin, for the Construction of the year 2021.
In 2016, Trevi implemented the preparatory works concerning the construction of the Norvik Port, the new terminal container. Trevi’s works included pre drilling activities, jet grouting, Lime Cement Columns and dynamic compaction.
The port of Stockholm located in the historic center of the city has always contributed to causing traffic congestion in urban areas. That s why, the Swedish authorities decided to build a new commercial dock in an extra-urban area, mostly dedicated to the storage of containers, the Norvik Port.
In 2016, Stockholms Hamnar (Ports of Stockholm) awarded to Trevi a contract for the preparatory works for this construction.
The extra urban area partially encompassed a zone madeup of filling aterial, whose sediments were characterized by a variable granulometry ranging from clay to boulders, evena few meters large. In order to support the heavy loads of the port, it has been necessary to consolidate the soil underneath the port yards through the installation of lime cement columns and jet grouting, while heavy dynamic compaction has been used for the crushed rock backfill’s improvement.
The preparatory works implemented by Trevi between 2016 – 2017 for the Norvik Port included:
Pre-drilling activities with a diameter of 270 mm, by a down the hole hammer (for about 31,000 linear meters) with a Soilmec SM-30, through the backfill made of gravel and boulders.
Execution of 3,300 Jet Grouting columns with a diameter of 1,500 mm, using Soilmec equipment SM-28 and SM-30, underneath a backfill of non-cohesive material and boulders for approximately 35,000 linear meters at a max. depth of 31 meters;
Installation of 9,600 Lime Cement Columns (LCC) with a diameter of 800 mm, for a total of about 205,000 linear meters;
After the successfully complection of the consolidation works for the Norvik Port, NCC awarded to TREVI an additional contract for soil improvement.
This second phase required the use of heavy dynamic compaction over an area with an extension of about 96,000 sm characterized by a regular grid of about 15,000 surface ‘footprints’.
This technology, rarely applied in Sweden, satisfy the project requirements and the tight work schedule, proving to be efficient and functional; hence, it turns out to be a goal-oriented method and confirms TREVI Group as a leader in the selection, proposal and application of modern and innovative technologies in any geotechnical sector.
Source: TREVI - Finanziaria Industriale S.p.A.