Sökning: "RIDAS"
Visar resultat 1 - 5 av 22 uppsatser innehållade ordet RIDAS.
1. Effekter av packning av finfilter i fyllningsdammar
Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurserSammanfattning : There are over 10 000 dams in Sweden of various types and sizes. Most of the larger dams were built around 1950-1970 when the Swedish hydropower was expanded. Since then, the knowledge of engineering dam structures has increased and there are new guidelines for how a dam should be built. LÄS MER
2. Numerical simulations of pore pressure on concrete buttress dams
Master-uppsats, KTH/BetongbyggnadSammanfattning : Uplift pressure is one of the most dominant forces on a dam structure. Difference in head water and tail water creates a hydraulic gradient resulting an upward oriented pressure called uplift pressure, which reduces the dam safety against sliding. LÄS MER
3. Assessing the safety of cracked concrete dams
Master-uppsats, KTH/BetongbyggnadSammanfattning : AbstractThe overall safety of dams depend on several stipulations. One of them is global stability of the dam, which is addressed with approaches like that in (RIDAS, 2017) (the Swedish power companies’ guidelines for dam safety). When designing a new dam, two global failure modes; sliding and overturning should be considered according to RIDAS. LÄS MER
4. Utveckling av en generell metod för läckageövervakning vid fyllningsdammar
Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknikSammanfattning : Fyllningsdammar har alltid ett naturligt läckage då jordmaterialet som används har en viss permeabilitet. Detta acceptabla naturliga läckage är viktigt att övervaka för att kontrollera att läckageflödet håller sig inom förväntade värden. LÄS MER
5. An alarm system for pore pressure measurements in the foundation ofconcrete dams : a case study of Storfinnforsen buttress dam
Master-uppsats, KTH/Jord- och bergmekanikSammanfattning : Concrete buttress dams are relatively light structures and less demandingon foundations; because of that, they may have problems with upliftforces and horizontal joints in the area of the dam´s foundation maypresent a failure mode through sliding. The Storfinnforsen dam, thelargest concrete dam in Sweden, had its foundation studied recently andthe discovery of sub-horizontal joints in the bedrock led to the necessityof having the safety of the dam foundation to sliding assessed. LÄS MER