An excavation tool for making ground excavations for panels and diaphragms includes at least one rotary excavation drum. At least one frame is adapted to support the excavation drum. At least one pump is adapted for suction of an excavation fluid. A brushless electric motor is adapted to put in rotation the at least one excavation drum. At least one mechanical reducer is operationally connected to the electric motor and the at least one excavation drum. The electric motor is installed in the frame and coaxial to the at least one excavation drum. The at least one mechanical reducer is coaxial to the electric motor and the at least one excavation drum. The at least one mechanical reducer is adapted to transfer rotary motion from the electric motor to the at least one excavation drum.

An excavation tool for making ground excavations for panels and diaphragms includes at least one rotary excavation drum. At least one frame is adapted to support the excavation drum. At least one pump is adapted for suction of an excavation fluid. A brushless electric motor is adapted to put in rotation the at least one excavation drum. At least one mechanical reducer is operationally connected to the electric motor and the at least one excavation drum. The electric motor is installed in the frame and coaxial to the at least one excavation drum. The at least one mechanical reducer is coaxial to the electric motor and the at least one excavation drum. The at least one mechanical reducer is adapted to transfer rotary motion from the electric motor to the at least one excavation drum.

The invention relates to a drilling machine (10) for drilling ground (S) in a vertical drilling direction (F), the machine comprising: an anchor module (30) having a front face (32) and a rear face (34), the anchor module comprising at least one anchor device (40) having at least one front anchor pad (42) and at least one rear anchor pad (44) that are deployable in a deployment direction (D1) extending transversely to the longitudinal direction (L) of the drilling machine (10) so as to bear against walls (P1, P2) of the excavation (E) in order to hold the anchor module (30) stationary in the ground.

The anchor module (40) further comprises: a frame (70) carrying the front and rear anchor pads (32, 34), the frame (70) supporting the drilling module (50); and an actuator device to which the front and rear anchor pads (34) are fastened, the actuator device being movable relative to the frame (70) in a movement direction (D2) that extends transversely to the longitudinal direction; whereby the frame (70) of the anchor module together with the drilling module (50) are movable relative to the assembly constituted by the front anchor pad (42), the rear anchor pad (44), and the actuator device (72) in the movement direction.

The invention relates to a drilling machine (10) for drilling ground (S) in a vertical drilling direction (F), the machine comprising: an anchor module (30) having a front face (32) and a rear face (34), the anchor module comprising at least one anchor device (40) having at least one front anchor pad (42) and at least one rear anchor pad (44) that are deployable in a deployment direction (D1) extending transversely to the longitudinal direction (L) of the drilling machine (10) so as to bear against walls (P1, P2) of the excavation (E) in order to hold the anchor module (30) stationary in the ground.

The anchor module (40) further comprises: a frame (70) carrying the front and rear anchor pads (32, 34), the frame (70) supporting the drilling module (50); and an actuator device to which the front and rear anchor pads (34) are fastened, the actuator device being movable relative to the frame (70) in a movement direction (D2) that extends transversely to the longitudinal direction; whereby the frame (70) of the anchor module together with the drilling module (50) are movable relative to the assembly constituted by the front anchor pad (42), the rear anchor pad (44), and the actuator device (72) in the movement direction.

The present invention relates to a special civil engineering machine, in particular a slurry wall cutter, comprising at least one rotating tool and a tool drive that is arranged within a housing of the special civil engineering machine and is sealed with respect to the environment by means of at least one bearing seal in the region of its shaft exit from the housing to the driven tool, characterized in that the bearing seal comprises at least two separate sealing elements, whose arrangement forms a sealing chamber located between the sealing elements, wherein a pressure compensation device is provided, which controls the chamber pressure in the sealing chamber in dependence on the ambient pressure of the special civil engineering machine.

The present invention relates to a special civil engineering machine, in particular a slurry wall cutter, comprising at least one rotating tool and a tool drive that is arranged within a housing of the special civil engineering machine and is sealed with respect to the environment by means of at least one bearing seal in the region of its shaft exit from the housing to the driven tool, characterized in that the bearing seal comprises at least two separate sealing elements, whose arrangement forms a sealing chamber located between the sealing elements, wherein a pressure compensation device is provided, which controls the chamber pressure in the sealing chamber in dependence on the ambient pressure of the special civil engineering machine.

A device for making a vertical retaining wall and/or foundation includes a frame with a substantially vertically movable outer end, and a cutting frame mounted close to the outer end. The cutting frame has at least one pair of drums rotatable about respective rotation axes that lies parallel to each other so the drums can rotate adjacently of each other. An outer surface of each drum has at least one row with at least five cutter holders extending radially from the outer surface. Each cutter holder has at least one cutting element extending away from the outer surface and having a stop surface which has an angle with a centre line which intersects the rotation axis of the corresponding drum and a centre of the corresponding cutter holder at the outer surface. The drums are driveable to dislodge soil while the outer end is driven into the soil.

A device for making a vertical retaining wall and/or foundation includes a frame with a substantially vertically movable outer end, and a cutting frame mounted close to the outer end. The cutting frame has at least one pair of drums rotatable about respective rotation axes that lies parallel to each other so the drums can rotate adjacently of each other. An outer surface of each drum has at least one row with at least five cutter holders extending radially from the outer surface. Each cutter holder has at least one cutting element extending away from the outer surface and having a stop surface which has an angle with a centre line which intersects the rotation axis of the corresponding drum and a centre of the corresponding cutter holder at the outer surface. The drums are driveable to dislodge soil while the outer end is driven into the soil.

The invention relates to a drilling machine (10) including a grab frame (12) which comprises a body (16) extending along a longitudinal direction (L), a movable member (32), a first arm (34) pivotable relative to the movable member, a second arm (36) pivotable relative to the movable member (32), the second arm having a lower end part, at least one actuator device (37) connected to the body to move at least the first arm (34) relative to the body; The invention is characterized in that said drilling machine (10) includes a removable milling device (100) including a first dismountable securing device (120) for removably fixing the support (110) to the body (16), and a second dismountable securing device (150) for removably fixing the support (110) to the first arm, whereby the milling device can be easily dismounted from the frame.

The invention relates to a diaphragm wall cutter for cutting a cutting trench in the ground, comprising a cutting frame, at least one rotatably drivable cutting wheel which is mounted on an lower side of the cutting frame, a suction nozzle, which is arranged in the region of the at least one cutting wheel and is provided with at least one suction opening, and a suction pump which is configured for suctioning slurry from the cutting trench during cutting via the suction nozzle, the suction pump being connected to the suction nozzle via a suction line. According to the invention, it is provided that at least one filling port is provided for filling the suction pump and the suction line with a liquid when the suction line is shut-off, wherein the suction line and the suction pump are filled with liquid for starting the suction pump.