I want to the check slope stability of canal section which is excavated in expansive clay. At present soil profile shows stiff to hard clay but after excavation soil will be loosened up and shear strength will be reduced when water will flow throught it, as water will enter in pores and develops pore water presuure (in submerged case). I have soil parameters for present stage but no exact corelation for reductions in cohesion and friction once it is in submerged state. Another concern is that canal have a daily fluctions of abot 10-12 m in water level (maximum canal height is 16 m approx), I cannot provide lining to canal. Also available software with me does not take care of sudden drawdown case (in that case water will be present in pores and starts flowing back to u/s and thus add to driving moment but due to pore water reduced shear strength of soil is experienced) which may be experienced once canal works for a year or so. I have some literatures for methodology and principles but its not possible to check it mannually, please suggest me software which takes care of long term stability of side slope in clay under sudden drawdown case (which is expected the worse case).
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