Graton Tunnel
Quick Summary
The Graton Tunnel is a tunnel in Peru that encountered significant water inflows. In 1969, a flow reached 60,000 gallons (230,000 liters) per minute. To manage such high-pressure flows, parallel tunnels can be driven alternately to relieve pressure. In another instance in 1970, a refrigeration plant was needed to work through a large inflow of hot water at 150° F (66° C) in the 7-mile tunnel, which was driven under the Andes to drain a copper mine.12
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tunnels and underground excavationsEnvironmental control…(66° C) in the 7-mile Graton Tunnel, driven under the Andes to drain a copper mine in Peru.
Read More…(66° C) in the 7-mile Graton Tunnel, driven under the Andes to drain a copper mine in Peru.
Read More- tunnels and underground excavationsWater inflows
… and in 1969 on the Graton Tunnel in Peru, where flow reached 60,000 gallons (230,000 litres) per minute. Another technique is to depressurize ahead by drain holes (or small drainage drifts on each side), an extreme example being the 1968 Japanese handling of extraordinarily difficult water and rock conditions on…
Read More… and in 1969 on the Graton Tunnel in Peru, where flow reached 60,000 gallons (230,000 litres) per minute. Another technique is to depressurize ahead by drain holes (or small drainage drifts on each side), an extreme example being the 1968 Japanese handling of extraordinarily difficult water and rock conditions on…
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