Essays about: "Tunnels"

Showing result 26 - 30 of 125 essays containing the word Tunnels.

  1. 26. Tunnel Seismic Prediction in Stockholm Bypass

    University essay from KTH/Jord- och bergmekanik

    Author : Matilda Wessén; Janita Österberg; [2021]
    Keywords : Tunnel Seismic Prediction; TSP; Seismic waves; Stockholm Bypass; Geological mapping; Measurement While Drilling; Tunnel Seismic Prediction; TSP; Seismiska vågor; Förbifart Stockholm; Bergkartering; Measurement While Drilling;

    Abstract : Tunnel Seismic Prediction (TSP) is a geophysical investigation method used to predict the rock conditions ahead of the tunnel face. The method has been used in different types of rock and rock conditions. READ MORE

  3. 27. Ash distribution and cavities in Icelandic glaciers, a marker for snow accumulation and radar signal velocity change

    University essay from Göteborgs universitet/Institutionen för geovetenskaper

    Author : Andrea Håkansson; [2020-01-15]
    Keywords : Iceland; GPR; CMP; Glacier; Vatnajökull; Háabunga; Langjökull;

    Abstract : Glaciers in the geologically active Iceland has a high scientific as well as touristic value. In this thesis, the two largest glaciers on Iceland have been studied with GPR to find if the method is suitable to use in future glaciolocial studies where accumulation patterns and similar attributes are in focus in a world of deglaciation. READ MORE

  4. 28. Dispersion of cement-based grout with ultrasound and conventional laboratory dissolvers

    University essay from KTH/Byggvetenskap

    Author : Antranik Karamanoukian; [2020]
    Keywords : ultrafine cement grout; microfine cement grout; dispersion; additives; ultrasound dissolver; laboratory dissolver; ultrafint cementbruk; mikrofin cementbruk; dispergering; tillsatser; ultraljud apparat; laboratorieblandaren;

    Abstract : In any underground facilities especially tunnels, it is essential to seal the area against water ingress and leakage of reserved materials. Grouting is a common method used to seal rocks around tunnels, successful grouting reduces the duration and cost of the construction, guarantees better working environment and higher safety, minimizes the maintenance and most important decreases the corresponding environmental hazards significantly. READ MORE

  5. 29. Laboratory testing of shotcrete with fibres of steel, basalt or synthetic materials

    University essay from KTH/Betongbyggnad

    Author : Muralidharan Rengarajan; [2020]
    Keywords : Fibre reinforced shotcrete; Energy absorption; Residual strength; Fibres; and Laboratory testing;

    Abstract : Shotcrete or sprayed concrete has become an inevitable material for stabilising and supporting hard rock tunnels. To prevent rock block fallouts in the excavated tunnel, shotcrete is pneumatically projected under high pressure on the rock surface. READ MORE

  6. 30. Autonomous Aerial Void Exploration

    University essay from Luleå tekniska universitet/Datavetenskap

    Author : Emil Vidmark; [2020]
    Keywords : Robotics; Quadrotor; Autonomous Vehicles; Autonomous Exploration;

    Abstract : Deploying robots in unknown and complex areas for inspection tasks is becoming a real need for various application scenarios. Recently, there has been an increasing interest to develop and use autonomous aerial robots in environments such as urban voids and subterranean mine tunnels, aiming to decrease the human presence in dangerous or inaccessible areas. READ MORE