Sökning: "down-the-hole DTH drill."

Hittade 2 uppsatser innehållade orden down-the-hole DTH drill..

1. 1. Påldrivning: Jämförelse mellan luft- och vattendriven borrning : En utredning av jämförelser avseende slitage, logistik och driftkostnader

   Kandidat-uppsats, KTH/Byggteknik och design

   Författare :Andreas Bengtsson; Pierre Bodin; [2022]
   Nyckelord :: percussion hammer; pilot; DTH; pile driving; wear; drill rig; casing; piston; check valve; water-handling; sedimentation; : sänkhammare; pilot; DTH; pålning; slitage; borrigg; foderrör; kolv; backventil; vattenhantering; sedimentering;

   Sammanfattning : Skanska Grundläggning in Region Special wishes to gain an increased understanding of the extent to which it differs in the wear of percussion hammers and pilot drill crowns, depending on which driving medium is used in down-the-hole drilling, as well as logistical and economic aspects depending on the chosen method. Down-the-hole drilling means that the hammer works down in the borehole and forms one of the components at the far end of the drill string together with a drill bit. LÄS MER

3. 2. Grundförstärkning med pålar i berg : I befintlig konstruktion med begränsat utrymme

   Kandidat-uppsats, KTH/Byggteknik och design

   Författare :Madicken Höglund; Marcus Larsson; [2020]
   Nyckelord :Steel pipe; steel core pile; waterproofing; pile foundation; down-the-hole DTH drill.;

   Sammanfattning : This study has been done in order to examine which type of pile, pile driving- and waterproofing methodsare most suited for an existing building. A building that will undergo an extensive reinforcement of itsfoundation. LÄS MER