Abstract: The application relates to a robust self-propelled device, having an oblong shape and a self-supporting housing (1) of the exoskeleton type, having attached a winch (10) and that is supported by a rail track (8), comprising active parts and supporting parts: a levelling blade (2) connected by means of swiveling rods (9) to the housing exoskeleton and in the top part thereof to a laser receiver (6) by a removable graduated rod (5), also in the rear part it is provided with an active device for placing ducts (3). The said device is operated by an actuating and control panel (7), mounted by means of a removable supporting rod (4). The said device serving to eliminate the need for the human presence in the sewerage channel, preventing the risk of accidents, increasing the construction rate, increasing the accuracy in laying the sand base and also placing the sewerage duct on the sand base.

Abstract: The application relates to a robust self-propelled device, having an oblong shape and a self-supporting housing (1) of the exoskeleton type, having attached a winch (10) and that is supported by a rail track (8), comprising active parts and supporting parts: a levelling blade (2) connected by means of swiveling rods (9) to the housing exoskeleton and in the top part thereof to a laser receiver (6) by a removable graduated rod (5), also in the rear part it is provided with an active device for placing ducts (3). The said device is operated by an actuating and control panel (7), mounted by means of a removable supporting rod (4). The said device serving to eliminate the need for the human presence in the sewerage channel, preventing the risk of accidents, increasing the construction rate, increasing the accuracy in laying the sand base and also placing the sewerage duct on the sand base.