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Securing immersed tunnels with Wassara

Hole straightness

Anchoring of immersed tunnels involves drilling long holes with strict accuracy requirements. The water-powered DTH hammer from Wassara has a proven track record of its ability to drill long straight holes.


High drilling performance

A Wassara water-powered DTH hammer will maintain a high rate of penetration in most kind of formations. The Wassara hammer performance is unaffected by water in the formation, even at high back pressure.


High quality borehole surface

Water-powered DTH drilling gives an optimal borehole surface for the anchoring process. The borehole surface needs to be clean and have enough roughness to ensure successful grouting of the anchor.