Sökning: "Rock grouting"

Visar resultat 1 - 5 av 32 avhandlingar innehållade orden Rock grouting.

  1. 1. Drip Sealing Grouting of Tunnels in Crystalline Rock: Conceptualisation and Technical Strategies

    Författare :Christian Butron; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; icicle formation; drip sealing; unsaturated flow; rock fracture; dripping.; channels; crystalline rock; design; Grouting; ice growth; evaluation;

    Sammanfattning : A conceptual model of the groundwater hydraulic conditions around the tunnel contour in ancient brittle crystalline rocks has been developed and verified. The general aim has been to reach an understanding of the groundwater conditions in and close to the tunnel roof where dripping takes place and to propose technical and practical strategies for waterproofing. LÄS MER

  3. 2. 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

  4. 3. On the Use of Engineering Geological Information in Rock Grouting Design

    Författare :Sara Kvartsberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Observational method; Transmissivity distribution; Grouting; Design class; Geological prognosis; Fractured rock; Hydraulic domain; Tunnels;

    Sammanfattning : Underground rock construction is dependent on appropriate assessments of the geological settings at the project site. Relevant geological information must be collected, interpreted and communicated clearly with the aid of engineering geological prognoses. LÄS MER

  5. 4. 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

  7. 5. Grouting of Fractured Rock with Silica Sol; Grouting design based on penetration length

    Författare :Johan Funehag; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Grouting; hydraulic test; sand column; propagation; penetration length; pipe flow; aperture; transmissivity; colloidal silica; silica sol; rheology; gelling liquids; field study;

    Sammanfattning : ABSTRACTRecent grouting projects in Sweden have concentrated on the grout itself. The only grout normally used in Sweden is cement-based. During the past 10 years, the acceptable flow of water into tunnels has been reduced significantly. The current requirements mean that an average fracture aperture of around 0. LÄS MER