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Showing result 1 - 5 of 9 essays matching the above criteria.

1. 1. Back analysis of rock mass properties in the regional fault zone under Lake Mälaren

   University essay from KTH/Jord- och bergmekanik

   Author : Jiaqi Liu; [2022]
   Keywords : Rock mass property; back analysis; tunnel deformation; optimization algorithm; numerical analysis; Bergmassans egenskaper; bakåtanalys; tunnleldeformation; optimeringingsalgoritm; numeriska analyser.;

   Abstract : The properties of the surrounding rock mass in underground projects have significant impacts on the design and construction. However, it is quite challenging to evaluate rock mass properties due to the great uncertainties of the geological conditions. READ MORE

3. 2. 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

4. 3. Stochastic Settlement Model Including Creep Effects : Simulation of Groundwater Induced Subsidence

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Pierre Wikby; Ragnar Andersson; [2020]
   Keywords : creep settlement; secondary compression; geotechnical uncertainty; EMBANKCO; groundwater drawdown; time-dependent settlement model; krypsättningar; Sekundärkompression; geoteknisk osäkerhet; EMBANKCO; grundvattensänkning; tidsberoende sättningsmodell;

   Abstract : When underground openings are constructed, groundwater inflow can occur, which might lead to ground settlements, namely in clay. In these types of construction projects, it is beneficial to be able to quantify risks related to these settlements. A framework developed by Sundell et al. (2019, Risk Analysis, Vol. READ MORE

5. 4. The Impact of Fracture Orientation on the Choice of Grout Fan Geometry - a Statistical Analysis

   University essay from KTH/Jord- och bergmekanik

   Author : Fredrik Osterman; [2019]
   Keywords : Rock Fissure Grouting; Grout Fan Geometry; Geology; Discrete Fracture Network; Sprickinjektering i berg; skärmgeometri; geologi; diskreta spricknätverk;

   Abstract : Water ingress into rock tunnels is a problematic phenomenon – especially in urban areas – as a lowered groundwater table may cause harmful settlements. Furthermore, too much ingress can be an incentive for the environmental court to halt the tunnel process, in order to protect the nature as part of a national interest. READ MORE

6. 5. Modeling contingency infiltration scenarios in MODFLOW : Stockholm Bypass and tunnel induced groundwater drawdown

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Aslan Abdo; [2019]
   Keywords : tunnel induced groundwater drawdown; MODFLOW; artificial recharge; land subsidence; grundvattenavsänkning; tunnel inläckage; MODFLOW; infiltration; sättning;

   Abstract : Subsurface constructions, such as tunnels, create hydrogeological challenges in mitigating risk of subsidence due to groundwater drawdown. Presenting readily made precautionary mitigation plans, such as strategically planned artificial recharge applications, can help effectivise the mitigation process. READ MORE