A cage clamp 2 comprises a base 4 a mandrel 6 a clamp 8a, 8b, 8c wherein the mandrel and the clamp are mounted to the base. A pile driver is couplable to the base in vibratory engagement to allow mutual vibration between the pile driver and the base. The clamp is operable to clamp the pile reinforcing cage 24 in a space between the mandrel and the clamp by actuating the clamp towards the mandrel. The pile driver may be coupleable to a first side of the base and the mandrel and clamp to a second side. There may be three clamps and clamp pads 16a, 16b, 16c may be provided on each clamp. A tapered guide member 14 may be provided to guide the cage into the space between the clamps and the mandrel.
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