Abstract: The present invention relates to a machine for digging into the lower layers of the ground, wherein said machine comprises the following members: a base frame (1), a ground excavator (2) and a driving chain-type working organ (3) that is suspended from the frame (1) by a device (4) so as to be capable of forced rotation about two geometrical axes (17, 18). During operation of the machine, the axis (17) is perpendicular to the support surface (5) of the drive section (6) of the frame (1), while the axis (18 ) is parallel to the longitudinal axis (a—a) of said drive section (6). During operation, the rotation of the working organ (3) about the two axes (17, 18) makes it possible to dig excavations with a bottom that is horizontal or has a predetermined lateral inclination while maintaining an important width, to form sloped excavations or to dig excavations having various profiles.

Abstract: The present invention relates to a method for padding ground below a duct (1) using excavated soil (2), wherein said method uses a vehicle (6) that comprises a soil feeding organ (13), a transport organ (14) and soil compacting organs (104, 105). The vehicle moves along a ground path (16) which is formed by the soil feeding organ (13) as it collects excavated soil (2). This method allows for a reliable orientation of the soil compacting organs (104, 105) relative to the duct (1), wherein said compacting organs apply a force on the soil previously deposited in the trench (4). This invention also relates to a device which is used for padding ground below a duct (1) and comprises a device (106) for hanging a soil-compacting mechanism (103) to the vehicle (6). The device (106) includes a disconnection mechanism (153) that enables the cyclic displacement of the rammer-type compacting organs (104, 105) in the displacement direction of the vehicle (6).

Abstract: The invention pertains to construction earth-moving machinery for overhauling of main oil pipelines, gas pipelines, or pipelines for other purposes, namely machines for uncovering pipelines of a broad range of diameters, with trench working much lower than the lower generatrix of the pipeline for digging under it in repair of the pipeline in the trench without its lifting. Furthermore, the invention pertains to operating elements, predominantly of machines for uncovering of pipelines.

Abstract: The detector of the invention comprises two driving loops mounted at an angle to one another and rigidly tied to receiving loops connected to a balancer, differential amplifier and to the data inputs of electric signal compensators. The detector is equipped with a switch, providing alternate connection of a generator to one driving loop and to the control input of one compensator and the output thereof to the input of an amplifier, and then to the other driving loop and to the control input of the other compensator and its output to the input of the other amplifier. The amplifiers are connected to data processors, recorders, an OR gate, and a signalling unit.

Abstract: The detector of metalliferous objects comprising an electrically coupled to an alternating voltage generator driving loop, rigidly fitted to two pairs of receiving loops, positioned at opposite sides of the driving loop, coaxial and parallel to one another. The receiving loops are connected to connected in series balancers, differential amplifiers, electric signal compensators with the control inputs thereof connected to the generator, selective amplifiers, data processors, logic OR gate, and signalling unit.