Page 26 - The Consequences of an Incorrect Seismic Survey
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Caissons
1. Rock socket length of 4.5m.
2. Hand-dug with cast-in-place full circumferential reinforced concrete
segmental linings.
3. The lining comprised inverted frustum-shaped segments and each
segment was 0.8m long.
4. It took 1 to 2 days to advance the caisson bore each segment in soil.
5. Each rock socket excavation took 2 to 3 weeks to complete.
6. Typically took up to 6 weeks to construct a caisson pile in soil to
bedrock 12m deep below.
7. Every 4m extra length caisson excavation in soil incurred about 10
extra days of construction per pile.
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