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Grout Injection of Sheet Piling

This steel sheet piling flared out at the bottom during installation.  This flaring created a non-watertight seal, enabling lake water to enter the work area.  To stop the unwanted water, polyurethane grout was injected into the void.  To inject the grout, a hole was drilled into the sheet pile and a mechanical injection packer was installed.  The injection end from a grout pump is then attached to the packer.  The grout used was Hyperflex, which is a pre-catalyzed single component hydrophobic polyurethane.  Hyperflex reacts with moisture to form a flexible foam and is NSF/ANSI/CAN 61 approved for contact with potable water.  Hyperflex is manufactured by SealGuard, Inc.  The grouting was performed by grouting contractor Sub-Technical, Inc.