Sökning: "ballasted tracks and maintenance"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden ballasted tracks and maintenance.

  1. 1. Simulation of railway infrastructure with asphalt layer for tracks in Sweden

    Master-uppsats, KTH/Byggvetenskap

    Författare :Aleksandra Kuksova; [2020]
    Nyckelord :Ballasted track; bituminous mixture; bituminous sub-ballast; temperature; railway track modelling; finite element analysis. v;

    Sammanfattning : With the introduction of high-speed trains over the past few years, as well as withan increase in traffic loads and volumes, the attractiveness and competitiveness ofthe railway transport system have increased. This leads to the need to develop newcost-effective ways in railway construction, providing an increase in the life cycle ofthe railway track and reducing the need for maintenance. LÄS MER

  3. 2. Ogräsbekämpning på järnväg : En jämförande studie av alternativ till glyfosat

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Clara Magnusson; [2020]
    Nyckelord :Railway; weed management; weed control; maintenance; fixed track; slab-track; glyphosate; pelargonic acid; hot water; steam; electricity; Järnväg; ogräsbekämpning; underhåll; ballastfri; glyfosat; pelargonsyra; hetvatten; vattenånga; elektricitet;

    Sammanfattning : På Sveriges järnvägsnät bekämpas ogräs med det kemiska bekämpningsmedlet glyfosat. En omställning är nu på gång och fler bekämpningsmetoder behöver introduceras, bland annat för att motverka resistensutveckling hos ogräsen. LÄS MER

  4. 3. Railway bridges with floating slab track systems : Numerical modelling of rail stresses - Dependence on properties of floating slab mats

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Byggkonstruktion och -produktion

    Författare :Daniel Kostet; [2018]
    Nyckelord :ballasted track; bridge; elastic mat; expansion; finite element method FEM ; finite element analysis FEA ; floating slab mat; interaction; International union of railways UIC ; non-ballasted track; SOFiSTiK; ballasterat spår; ballastfritt spår; bro; dilatationsfogar; finita elementmetoden FEM ; finit elementanalys FEA ; fixerat spår; interaktion; Internationella järnvägsunionen UIC ; SOFiSTiK; vibrationer; vibrationsdämpande matta;

    Sammanfattning : The increased use of continuously welded rails in the railway systems makes it necessary to increase the control of the rail stresses to avoid instability and damages of the rails. Large stresses are especially prone to appear at discontinuities in the railway systems, such as bridges, due to the interaction between the track and the bridge. LÄS MER

  5. 4. LCC approach for High-speed ballastless tracks

    Master-uppsats, KTH/Transportplanering, ekonomi och teknik

    Författare :Irene Serrano González; [2015]
    Nyckelord :;

    Sammanfattning : An approach of life cycle cost analysis (LCCA) for high-speed ballastless tracks in Spain is carried out in this document based on an approximation of the present value behaviour through the Electre II Multi criteria method. A review of other LCC researches has been done analysing their results in order to adapt previous experimental tracks costs to the present study which is focused on construction and maintenance costs in Spain. LÄS MER

  7. 5. Övergångszoner mellan ballastspår och ballastfria spår

    Kandidat-uppsats, Lunds universitet/Utbildningar i Helsingborg

    Författare :Andreas Åswärdh; Henrik Lund; [2014]
    Nyckelord :transition zones; transition constructions; ballastless tracks; slab tracks; ballasted tracks and maintenance; Technology and Engineering;

    Sammanfattning : In today’s railway facilities there are several types of track systems with different characteristics, which must interconnect in order to obtain a closed network. The area where a track system passes over into another track system is called a transition zone. LÄS MER