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Most of the pier foundations were cast-in-place
concrete piles constructed by the RCD(Reverse
Circulation Method) method. The rest of the
pier foundations was spread foundation type.
For the pier of the truss bridge, 40 to 60
concrete piles were constructed using the
steel casing with the diameter of 1,500 mm
(t=12mm). The steel casing of which the length
was about 30m were driven into the soft rock.
For the pier of the steel box bridge, 29 to
78 cast-in-place concrete piles were erected
using the 1,000mm steel casing. As the temporary
cofferdam to build foundations, the steel
sheet pile cofferdam and the steel caisson
cofferdam were erected. |
