Drilling for ground water control and wall stabilization with Wassara-hammers
During construction of a tunnel shaft or ramp it is necessary with cut-off walls for ground water control and wall stabilization. Cut-off walls often involves drilling in water rich formations which is easily done with the water-powered Wassara DTH hammer.
Tunnel shafts and ramps are often constructed in urban areas which means a risk of damage and settlement of surrounding structures due to drilling. This risk is greatly reduced with the
water-powered Wassara DTH hammer since it does not pressurize the formation in the way that pneumatic DTH drilling does.
One way to create cut-off walls is by making jet grouting columns. The unique Wassara Jet Grouting hammer will perform the job in one single pass which significantly increases the production rate. Performance will remain high even when there are boulders in the ground.