Sökning: "field tests"
Visar resultat 6 - 10 av 689 avhandlingar innehållade orden field tests.
6. Hole deviations in percussion drilling and control measures : theoretical and field studies
Sammanfattning : In this thesis, we study the problem of hole deviations in percussive drilling and present a solution to minimize the deviations. Field tests are performed to study the interactive behaviour of drilling parameters. LÄS MER
7. Fatigue Life of Riveted Railway Bridges
Sammanfattning : This dissertation, which focuses on the fatigue life of riveted steel railway bridges, is based on: - A series of full-scale fatigue tests of nine riveted stringers taken from a railway bridge built in 1896. A review of and comparison with the different full-scale fatigue tests on riveted railway bridge members, which have been conducted in other laboratories over the years, is also given. LÄS MER
8. Distributed thermal response tests : New insights on U-pipe and Coaxial heat exchangers in groundwater-filled boreholes
Sammanfattning : U-pipe Borehole Heat Exchangers (BHE) are widely used today in ground source heating and cooling systems in spite of their less than optimal performance. This thesis provides a better understanding on the function of U-pipe BHEs and Investigates alternative methods to reduce the temperature difference between the circulating fluid and the borehole wall, including one thermosyphon and three different types of coaxial BHEs. LÄS MER
9. Field Measurements and Predictions of River Flow, Sediment Transport and Morphological Changes
Sammanfattning : In an alluvial lowland river, sediment is transported in the form of suspended and bed loads. The fluvial process is the macroscopic view and long-term consequence of sediment movement. LÄS MER
10. Undrained shear strength in clay slopes - Influence of stress conditions. A model and field test study
Sammanfattning : To counteract natural hazards such as landslides, current methods for evaluation of soil properties as a mean for determining the safety level of natural slopes need to be refined. The empirical relationships used for estimation of the undrained shear strength from piezocone and field vane test are based on the stress conditions valid for horizontal ground and normally consolidated or slightly overconsolidated soil. LÄS MER