Henry Gustavsson | Helsinki University of Technology (original) (raw)
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The thawing of the frozen ground below an ice rink facility in Myllypuro, eastern Helsinki, Finla... more The thawing of the frozen ground below an ice rink facility in Myllypuro, eastern Helsinki, Finland was studied in detail through analytical approach and numerical simulations. A malfunction in the floor-heating system caused freezing conditions in the ground underneath. Over the years, frost heave caused significant deformations to the facility and, in 2012 forced an immediate renovation. During the renovation, the existing old foundation was replaced with a new foundation system comprised of a well-insulated concrete floor-slab and a group of around 240 steel thermal piles. Thermal piles were preferred in this case because the frozen ground surrounding individual piles needed to be thawed, hence a direct contact between the soil and the pile shaft can be prevented. This reduces the possible risk of additional load from the frozen ground being applied on the piles. As part of the ongoing monitoring programme, a thermal modelling of the thawing process was carried out with commercia...
The final safe disposal of spent nuclear fuel is one of the major challenges of our time. Nuclear... more The final safe disposal of spent nuclear fuel is one of the major challenges of our time. Nuclear powered nations are actively developing long-term waste management strategies and disposal concepts for their spent nuclear fuel, and high-level waste resulting from reprocessing. Direct disposal and reprocessing are the waste management strategies currently being adopted by countries around the world. In November 2015, the Finnish government granted the construction license to build a permanent deeprock geological repository for the final safe disposal of spent nuclear fuel in Finland; the first of its kind. Of other countries that have embraced the direct disposal concept, only Sweden and France have made significant progress in site selection and the development of their own disposal concepts. Canada and the UK have invited communities to volunteer to host a geological repository before the final screening of site selection process. Many other countries are in the preliminary stages ...
LWAgeolight is an internordic project aiming at developing technical solutions for the use of lig... more LWAgeolight is an internordic project aiming at developing technical solutions for the use of light weight clay aggregate (LWA) for insulation and light weight fill in roads and railways. The project is performed with financial support from Nordic Industrial Fund. The project has been organised with national activities in Finland, Sweden and Norway on the topics LWA in combination with geosynthetic reinforcment, hydraulically stabilised LWA and mechanically stabilised LWA. Internordic working groups have been established on the topics surface icing, required properties and test methods, publication and implementation of results in CEN. The project includes laboratory testing, numerical analyses, model tests and field tests. It has provided data on characteristics of LWA, structural behaviour and relevant factors for the construction with LWA. A separat Nordtest project on required properties has been performed in close co-operation with the LWAgeolight project. The conclusions are i...
The thawing of the frozen ground below an ice rink facility in Myllypuro, eastern Helsinki, Finla... more The thawing of the frozen ground below an ice rink facility in Myllypuro, eastern Helsinki, Finland was studied in detail through analytical approach and numerical simulations. A malfunction in the floor-heating system caused freezing conditions in the ground underneath. Over the years, frost heave caused significant deformations to the facility and, in 2012 forced an immediate renovation. During the renovation, the existing old foundation was replaced with a new foundation system comprised of a well-insulated concrete floor-slab and a group of around 240 steel thermal piles. Thermal piles were preferred in this case because the frozen ground surrounding individual piles needed to be thawed, hence a direct contact between the soil and the pile shaft can be prevented. This reduces the possible risk of additional load from the frozen ground being applied on the piles. As part of the ongoing monitoring programme, a thermal modelling of the thawing process was carried out with commercia...
The final safe disposal of spent nuclear fuel is one of the major challenges of our time. Nuclear... more The final safe disposal of spent nuclear fuel is one of the major challenges of our time. Nuclear powered nations are actively developing long-term waste management strategies and disposal concepts for their spent nuclear fuel, and high-level waste resulting from reprocessing. Direct disposal and reprocessing are the waste management strategies currently being adopted by countries around the world. In November 2015, the Finnish government granted the construction license to build a permanent deeprock geological repository for the final safe disposal of spent nuclear fuel in Finland; the first of its kind. Of other countries that have embraced the direct disposal concept, only Sweden and France have made significant progress in site selection and the development of their own disposal concepts. Canada and the UK have invited communities to volunteer to host a geological repository before the final screening of site selection process. Many other countries are in the preliminary stages ...
LWAgeolight is an internordic project aiming at developing technical solutions for the use of lig... more LWAgeolight is an internordic project aiming at developing technical solutions for the use of light weight clay aggregate (LWA) for insulation and light weight fill in roads and railways. The project is performed with financial support from Nordic Industrial Fund. The project has been organised with national activities in Finland, Sweden and Norway on the topics LWA in combination with geosynthetic reinforcment, hydraulically stabilised LWA and mechanically stabilised LWA. Internordic working groups have been established on the topics surface icing, required properties and test methods, publication and implementation of results in CEN. The project includes laboratory testing, numerical analyses, model tests and field tests. It has provided data on characteristics of LWA, structural behaviour and relevant factors for the construction with LWA. A separat Nordtest project on required properties has been performed in close co-operation with the LWAgeolight project. The conclusions are i...