In the 1980s, Japan buried coal fly ash beneath the sea to create solid ground for a giant bridge; after decades, the unusual foundation still supports its towers
- When engineers in Japan began work on the Hakucho Ohashi Bridge in Hokkaido in the 1980s, they faced an unusual problem beneath the water.
- The foundations for the bridge's two main towers had to be built on a soft seabed about 14 to 17 metres underwater.
- Instead of filling the construction area with conventional sand or soil, engineers developed a self-hardening slurry made partly from coal fly ash, an industrial waste product.
Unverified
- When engineers in Japan began work on the Hakucho Ohashi Bridge in Hokkaido in the 1980s, they faced an unusual problem beneath the water.
- The foundations for the bridge's two main towers had to be built on a soft seabed about 14 to 17 metres underwater.
- Instead of filling the construction area with conventional sand or soil, engineers developed a self-hardening slurry made partly from coal fly ash, an industrial waste product.
Sources: Times of India