Sökning: "geoteknik"

Visar resultat 26 - 30 av 201 avhandlingar innehållade ordet geoteknik.

1. 26. Laboratory Investigations of Frost Action Mechanisms in Soils

   Författare :Deniz Dagli; Jan Laue; Tommy Edeskär; Lukas Arenson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cold Regions Soil Mechanics; Frost Action; Frost Depth; Frost Heave; Heat Flow in Soils; Ice Lens Formation; Image Analysis; Laboratory Freezing Test; Soil Mechanics; Geoteknik;

   Sammanfattning : Phase change of the water in the soil skeleton under cold climate conditions (also known as frost action in soils) affects soil properties and can be responsible for serious alterations in a soil body; causing damages (due to the volumetric expansion known as frost heave) to structures on or below the ground surface such as foundations, roads, railways, retaining walls and pipelines, etc. In order to improve the current design methods for roads against frost action, the Swedish Transport Administration (Trafikverket) has initiated a research program. LÄS MER

3. 27. Excess pore water pressure generation in crushed and fine granular materials under cyclic traffic loads

   Författare :Tan Manh Do; Jan Laue; Hans Mattsson; Qi Jia; Ivo Herle; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Geoteknik; Soil Mechanics;

   Sammanfattning : Excess pore water pressure can develop in subgrades of railway and pavement substructures due to cyclic loading from heavy traffic, leading to the migration of fine particles into upper layers. This migration can clog pores and diminish the drainage capacity of upper layers,negatively impacting the long-term performance of sub-structures and service life, ultimately risking failure. LÄS MER

4. 28. Excess pore water pressure generation in fine granular materials under cyclic loading -A laboratory study

   Författare :Tan Manh Do; Jan Laue; M. Kubilay Kelesoglu; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Excess pore water pressure; migration of particles; fine granular materials; cyclic loading; Soil Mechanics; Geoteknik;

   Sammanfattning : Abstract Excess pore water pressure can be generated in subgrades of both railway and pavement sub-structures under cyclic loading caused by heavy traffic. When saturated subgrades are subjected to cyclic loading, excess pore water pressures accumulate over time which then could lead to migration of particles into overlying layers. LÄS MER

5. 29. Gummiklipp som konstruktionsmaterial i mark- och anläggningstekniska tillämpningar

   Författare :Tommy Edeskär; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Geoteknik; Soil Mechanics;

   Sammanfattning : I och med EG:s avfallsdirektiv från 1999 är det förbjudet att deponera hela däck från och med 2003 och förbjudet att deponera fragmenterade däck (gummiklipp) från och med 2006. Lagstiftningen syftar till ökad återanvändning eller återvinning av uttjänta däck. LÄS MER

7. 30. Use of tyre shreds in civil engineering applications : technical and environmental properties

   Författare :Tommy Edeskär; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Geoteknik; Soil Mechanics;

   Sammanfattning : End-of-life tyres are a disposal problem regarding the large volumes produced every year. Tyre shreds are primarily produced to reduce the transportation volumes of end-of-life tyres after collection. LÄS MER