Civil and Environmental Engineering 4426A/B Lecture Notes - Lecture 8: Pore Water Pressure, Slope Stability

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A total of four geoslope models were created at the critical intersection of the proposed highway and moore road. Two models were created for the proposed highway embankment and two were created for the moore road embankment. Constructing the highway embankment in one lift for drained conditions (fos=0. 909) or undrained conditions (fos=1. 221) is unsafe given the required undrained fos of 1. 2 and the drained fos of 2. 0. Road embankment in one lift for drained conditions (fos=0. 614) or undrained conditions (fos=0. 614) is unsafe given the required factors of safety. The moore road embankment will immediately settle 0. 14 meters and consolidate 1. 68 meters for a total settlement of 1. 82 meters. The highway embankment will immediately settle 0. 08 meters and consolidate 1. 03 meters for a total settlement of 1. 11 meters. Both overall settlements are unacceptable because the settlements will induce a change in elevation for the moor road embankment, and the clearance over the highway embankment will be insufficient.

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