![]() (See Excess Pore Pressure for more information about the B-bar method.) Materials (typically of low permeability) within which excess pore pressures are expected to be generated are assigned a B-bar material coefficient (B). The B-bar method assumes that changes in pore pressure in a material are directly proportional to changes in vertical stress, per Equation 1 below: We will create Scenarios for each of the analysis methods. Now, we will simulate rapid drawdown of the reservoir to zero level and compute the resulting factor of safety of the upstream dam face using the above-listed methods implemented in Slide2. Click on the Modeller icon in the toolbar to go back to the Modeller.The Spencer safety factor of the critical slip surface is about 1.9 at steady state reservoir conditions. When computations are done, select Analysis > Interpret to view the results shown below.To run a non-circular Cuckoo search analysis. The material properties ( Properties > Define Materials) and failure surface ( Surfaces > Surface Options) have already been set. The rapid drawdown conditions will be defined using parameters specific to the methods. Then we will entirely empty/remove the reservoir and determine the safety factor using the four rapid drawdown methods mentioned above. It is retaining ponded water at an elevation of 49m.įirst, we will compute the factor of safety of the dam at steady state (i.e., the dam under long-term full reservoir conditions). It consists of a dam with a clay core, transition zone, and granular fill outer layer. Select File > Recent Folders > Tutorials Folder from the menu and open Tutorial 13 Rapid Drawdown – starting file.slmd file.(All tutorial files installed with Slide2 can be accessed in the same folder.) 2.0 Model Geometry The finished file, Tutorial 13 Rapid Drawdown.slmd, can be found in File > Recent Folders > Tutorials Folder. 29 - Generalized Anisotropy – Exporting from Slide3 to Slide2įor more information, see Rapid Drawdown Analysis in Advanced Groundwater.28 - Using RSLog Cross Sections in Slide2. ![]() 27 - Damage Regions (Generalized Hoek-Brown).26 - Analysis of Embankment using multi-modal optimization (MMO).25 - Seismic Analysis with Newmark Method.24 - FOS for Geosynthetic Reinforced Retaining Wall.19 - Back Analysis of Material Properties.16 - Handling Tension in Limit Equalibrium.11 - Probabilistic analysis with random shear strength (COV).
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