A machine that excavates a groove and forms a wall in the groove

摘要

The machine has excavator units (54, 56, 56`, 58, 59), wall-forming units (18, 19), and propulsion units (22, 44, 52) causing the machine to advance along a path. Front and rear brake devices (30, 36) slow the advance or block rear, central and front portions (12, 14, 16) of the machine. A controllable connection and disconnection unit connects and disconnects the central portion respectively with the portions (12, 16) of the machine. The excavator units have cutter tools (54), rotary cylinders (56, 56`), cutter module (58) and cutter units (59). The wall forming units have a wall (18) and a concreting module (19) that comprises a number of injectors (22) for injecting liquid concrete. The propulsion units have an actuator (44) and a hydraulic actuator (52).