Abstract: The device comprises an undercarriage extending transversely of the working direction of the device, and supported, at its opposite ends, by respective pairs of worms with the worms of each pair rotating in respective opposite directions. A cantilever bracket is mounted on the forward side of the undercarriage, considered in the working direction. A plurality of conveyor troughs are mounted, for pivoting about a horizontal axis, on the forward edge of the undercarriage, and respective hydraulic actuators are connected between each trough and the cantilever bracket, so that the troughs, which are inclined rearwardly and upwardly, may be adjusted with respect to their angular orientation. Struts extending rearwardly from the undercarriage connect the undercarriage to a third driving unit which may comprise either a pair of oppositely rotating worms having their axes extending in the working direction or two laterally spaced pairs of worms.

Abstract: A device for embedding objects such as continuous pipes into water bottoms comprises a support frame which is movable along the bottom on a drive track which is carried adjacent one side thereof. The support frame also carries a plurality of guide and drive rollers which are engageable with the object to be embedded and which engage the object to move the support frame along the object as the drive track advances along the water bottom. A bottom trenching device in the form of a ground mill with a rotatable cutting head is pivotally mounted on a support between the drive rollers and the drive track and it operates on the bottom to remove material therefrom to form a trench. The material may be subsequently directed backwardly over the object to be embedded after it is positioned in the trench.