08/05/15 17:42:25 Hzv9bZJA0
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J. David Rogers, a professor in the department of geological engineering at the Missouri
University of Science and Technology in Rolla, said the Zipingpu station was a concrete-faced
rockfill dam 512 feet high. That means it is not made fully of concrete. Rather, it has a surface
of concrete that covers an interior structure of rock and earth.
Such a structure could be expected to have a “very noticeable” amount of settlement and
cracking in a quake like this one, Dr. Rogers said. No matter what the damage is, he said, the
first thing to do is to lower the level of water behind the wall, reducing the overall pressure
that can cause further damage.
A dam can fail in slow motion, he said. “If they do have a leak, this thing could fail two weeks
from now.”
２週間後だってよ。オマイラ。