Sökning: "Jalaleddin Yaghoobi Rafi"

Hittade 2 avhandlingar innehållade orden Jalaleddin Yaghoobi Rafi.

1. 1. Design approaches for grouting of rock fractures; Theory and practice

   Författare :Jalaleddin Yaghoobi Rafi; Stefan Larsson; Håkan Stille; Thomas Dalmalm; Lars Ericsson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Grouting; Rock mechanics; Jacking; penetration length; Järnvägsgruppen - Infrastruktur; Järnvägsgruppen - Infrastruktur;

   Sammanfattning : Currently, cement base grout is used widely for sealing of the rock fractures in order to decrease the permeability of rock mass. Grouting procedure is one of the main tasks in cycle of rock excavation. In addition, huge amount of grout should be used during dam construction in order to seal the bedding and embankment walls. LÄS MER

3. 2. Study of Pumping Pressure and Stop Criteria in Grouting of Rock Fractures

   Författare :Jalaleddin Yaghoobi Rafi; Håkan Stille; Mikael Rinne; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rock Mechanics; Grouting; Solid Mechanics; Hållfasthetslära;

   Sammanfattning : Today practice of grouting is based on empirical approaches in that, pumping pressure and stop criteria are determined by benchmarking similar projects. Considering a maximum limit for grouting pressure would allow applying a relatively high pressure that may lead to jacking of the fracture or even uplift of the rock mass. LÄS MER