Sökning: "Rock bolts"

Visar resultat 1 - 5 av 29 uppsatser innehållade orden Rock bolts.

  1. 1. En bergentreprenads omfattning : Några seniora bergbyggares och experters erfarenheter av lämpligt innehåll i det kontrakt som innehåller berguttaget, vid bergdrivning med metoden borra-spräng

    Uppsats för yrkesexamina på grundnivå, Mittuniversitetet/Institutionen för naturvetenskap, design och hållbar utveckling (2023-)

    Författare :Mary Westermark; [2023]
    Nyckelord :coordination rock construction; rock construction logistics; samordning bergbyggande; bergcykel; bergbyggnadslogistik;

    Sammanfattning : Detta kanske kan ses som en grundläggande crash course om berg-byggande. När ett bergutrymme ska byggas, vilka moment ingår lämpligen i samma entreprenadkontrakt som berguttaget och/eller samordnas med detta? Studien har varit ett försök att skapa sig en uppfattning om detta. LÄS MER

  3. 2. Soft Values are Game Changers for Manufacturing Companies : Identifying, Creating and Capturing Consumer Values

    Master-uppsats, Linköpings universitet/Projekt, innovationer och entreprenörskap

    Författare :Alexander Dawidson; Hillevi Arkel; [2023]
    Nyckelord :Value Creation; Value Capture; Soft Values; Management; Manufacturing; Value Identification;

    Sammanfattning : Business strategies for competitive succession have been captivating the attention of scientists and entrepreneurs from all over the world. As more competitive circumstances are reached within a market, the value perspective expressed by consumers becomes increasingly relevant. LÄS MER

  4. 3. Environmental and technical evaluation of cement reduction and test methods for fibre reinforced shotcrete in tunnels

    Master-uppsats, KTH/Betongbyggnad

    Författare :Elin Brodd; Lina Östlund; [2022]
    Nyckelord :Shotcrete; Global Warming Potential; Environmental Product Declaration; Tunnel construction; Fibre reinforcement; Compressive strength; Residual strength; GGBS; Sprutbetong; Klimatpåverkan; Miljövarudeklaration; Tunnelbyggande; Fiberarmering; Tryckhållfasthet; Residualhållfasthet; Granulerad Masugnsslagg;

    Sammanfattning : The dominating support method for hard rock tunnels today is use of fibre reinforced shotcrete in combination with rock bolts. The fibre reinforced shotcrete secures smaller blocks, while rock bolts are used to support larger blocks in the rock. Application of shotcrete is done by spraying against the rock surface using compressed air. LÄS MER

  5. 4. Optimization of support in rock pillars between two parallel tunnels

    Master-uppsats, KTH/Jord- och bergmekanik

    Författare :Alexander Kote; Sohaib Ishaq; [2022]
    Nyckelord :tunnel; rock pillar support; rock pillar stability; rock mass; stresses; arching effect; Nyckelord: tunnel; bergförstärkning; bergpelare; bergmassa; spänningar; valveffekt;

    Sammanfattning : When two parallel tunnels are excavated under high to moderate horizontal in-situ stresses combined with minor deformations in the pillar between the tunnels, the in-situ stresses can be redistributed over the tunnels in form of two compressive arches and are transferred from the roof to the abutments of the two tunnels. At additional deformations in the pillar, a new redistribution of the stresses can occur creating one compressive arch over both of the tunnels. LÄS MER

  7. 5. EVALUATION OF ENVIRONMENTAL AND TECHNICAL PERFORMANCE OF ALTERNATE FIBRES FOR SHOTCRETE IN TUNNELS

    Master-uppsats, KTH/Betongbyggnad

    Författare :Shilpa Anand; [2022]
    Nyckelord :Shotcrete; Life cycle assessment; Environmental Product Declaration; Global warming potential; steel; basalt and synthetic fibres; flexural strength; energy absorption.;

    Sammanfattning : Tunnels in hard and jointed rock are normally excavated in an arch shape to enable the rock mass to support its weight. Since the beginning of the 1980's, fibre reinforced shotcrete (FRS) in combination with rock bolts have been the dominating support method for hard rock tunnels. LÄS MER