Cofferdam set for demolition
(Xinhua)
Updated: 2006-06-05 06:01 Workers began to install
monitoring equipment on Saturday to ensure the safe demolition of the last
cofferdam built for the construction of China's Three Gorges Dam.
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Construction
workers cast the last concrete unit for the main section of the
mammoth Three Gorges Dam on Friday morning in the middle reach o f
the Yangtze River. The final concrete placement is due to finish on
Saturday, which will mark the completion of the dam's main wall.
[Xinhua]
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The equipment will measure the
impact of the explosion to prevent the blast from damaging the main dam 114
meters downstream on June 6.
The cofferdam, which has been in use since 2003, is 580 meters long and 140
meters high. About 192 tons of dynamite have been placed below the waterline to
demolish the dam above the 110-meter mark, a total of 186,000 cubic meters of
concrete.
Scientists will measure the surge, ground swell, vibrations, sound waves,
noise and other data, said Zhao Gen, a senior engineer.
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