Rapid Drawdown Question
Rapid Drawdown Question
(OP)
In a situation where you know you are going to have rapid drawdown, say an earth dam. What do you think is the best way to avoid a slope failure due to excess pore pressure within the embankment?





RE: Rapid Drawdown Question
f-d
¡papá gordo ain't no madre flaca!
RE: Rapid Drawdown Question
RE: Rapid Drawdown Question
RE: Rapid Drawdown Question
Presuming this is the case, you might consider stabilizing berms on the water side. These can be built by carefully dumping on the water side in a controlled fashion. You could also, in conjunction, build a riprap face on the water side. - not easy but nothing with 60 year old would be easy . . . Run your stability computations with such geometric changes and see how your stability is increased.
Years ago, I was involved with the stabilizing of a causeway in northern Quebec on very soft (Su about 10 kPa) clay. Luckily, it was winter and the lake had several feet of ice. We were able to lay a stabilizing berm on the ice - it deflected and when melted, laid the stabilizing berm on the lake bed.
RE: Rapid Drawdown Question