Patent ID: 7476057

Claim:
Method for making a trench wall in the soil, using a trench wall cutter comprising: a frame, at least one cutting wheel rotatably supported on the frame, drive means for setting the cutting wheel into a rotary motion, for stripping soil material located below the cutting wheel whilst forming a cut trench, liquid conveying means for supplying a settable liquid into the cut trench, wherein the liquid conveying means has at least one liquid supply nozzle which is arranged on the frame, and wherein the liquid supply nozzle is directed to the at least one cutting wheel, and gas conveying means for providing a defined supply of a gas into the cut trench, wherein the gas conveying means includes at least a gas supply nozzle which is arranged on the frame, and wherein the gas supply nozzle is directed to the at least one cutting wheel, the method comprising the steps of: lowering the trench wall cutter into the soil and rotating the at least one rotatably driven cutting wheel, to strip the soil material located below the cutting wheel and make a cut trench, supplying a settable liquid into the cut trench at the frame of the trench wall cutter using the at least one liquid supply nozzle, with the flow of the supplied settable liquid being directed to the cutting wheel, and supplying a gas into the cut trench in a defined manner at the frame of the trench wall cutter using the at least one gas supply nozzle, with the flow of the supplied gas being directed to the cutting wheel, and with a flow profile which surrounds a flow profile of the settable liquid during its supply.