Abstract: A method for determining a height (hs) of a settled bed in a mixture in a loading space (1). The mixture consists of a settled bed (5) and a mixture soup (3) which is located above the settled bed (5). The method includes: a) providing an elongated resonance member (10) in the loading space (1) which extends in a substantial vertical direction, b) measuring a resonance frequency (fo) of the resonance member (10), c) computing a height (hs) of the settled bed (5), Action b) includes determining an indication of or imposing the tensile force (Fs) acting in the longitudinal direction of the resonance member (10) and c) includes computing a height (hs) of the settled bed (5) based on the measured resonance frequency (fo) and the determined indication of the tensile force or the imposed tensile force.

Abstract: A deep sea mining method includes providing a deep sea mining system for mining matter from a bottom of a body of water, the mining system including: a slurry line coupled with a pump system to transport the slurry from the bottom of the body of water; and a return line in fluid communication with the slurry line and distinguishable from the slurry riser, for transporting non valuable slurry part to the bottom of the body of water, the return line having a return line outlet proximate the bottom. The deep sea mining method further includes spreading the non valuable slurry part over the bottom of the body of water in a controlled manner.

Abstract: The invention relates to a lifting tool for lifting or upending a flanged object, the lifting tool extending along a central longitudinal tool axis and comprising; a hoisting member for coupling the lifting tool to a hoisting line and applying a hoisting force to the lifting tool, a main frame for guiding a moveable flange engagement member, said flange engagement member moveably coupled with the main frame for supporting the flanged object, and moveably with respect to the main frame, a driving device coupled with the flange engagement member and the main frame for driving the flange engagement member radially with respect to the central longitudinal tool axis between a flange releasing position for introducing the lifting tool at least partly in said flanged object and past the flange thereof and a flange supporting position wherein the flange engagement member supports the object, wherein the driving device comprises a linkage system coupled with the hoisting member and the flange engagement member such

Abstract: A method of forming a structure includes a) excavating a material; b) homogenizing the material; c) ensuring aluminosilicate levels in the material; d) increasing alkaline levels of the material; e) foaming the material; and f) injecting the material onto a surface, wherein the material forms into a foam-like structure when injected.

Abstract: A pile driving assembly for installing a pile in an underwater bottom comprises a tubular pile and a hammer for driving the pile into an underwater bottom. The assembly is provided with a soil remover for removing soil inside the pile. The soil remover is located below the hammer and remote from a lower end of the pile in assembled operating condition.

Abstract: The invention relates to a pile upending system for upending a pile such as a monopile for the foundation of offshore wind turbines, the pile upending system comprising; a pivotally mounted pile support frame having a seat for engaging an outside wall of a pile, the pile support frame being pivotable around a support frame axis of rotation for allowing the seat to support the pile during upending, a cable system for supporting an, in use outboard, end of a pile, comprising one or more tensioned or tensionable cables having an outboard end provided with a hoisting member for supporting the outboard end of the pile during upending of said pile, an outboard support system comprising a frame member for, in use, extending outboard and supporting the hoisting member of the cable system, wherein the outboard support system is arranged with respect to the pile support frame such that the frame member extends transverse with respect to the support frame axis of rotation for arranging the hoisting member at a dista

Abstract: An overflow system for a hopper dredger includes an overflow tube; and a plurality of canals adjacent and substantially parallel to the overflow tube. The plurality of canals have inlets at different heights for taking in head water from the hopper. The plurality of canals fluidly connect to the overflow tube at a point downstream from the inlets.

Abstract: The invention relates to a spud system for a dredging vessel with a longitudinal direction, which spud system comprises; a spud carrier for mounting a spud therein in a vertical stance and which spud carrier is mounted for limited rotation around a horizontal transverse axis and is moveable with respect to the dredging vessel in a longitudinal direction for advancing the dredging vessel, and a spud carrier drive system coupled with the dredging vessel and the spud carrier for driving the spud carrier with respect to the dredging vessel.

Abstract: The invention relates to a tooth system for a cutter head, the tooth system comprising; a tooth member comprising a cutting portion and a mounting portion with at least one curved surface, a holder comprising a receiving portion with a curved surface complementary to the at least one curved surface of the tooth member, the receiving portion for receiving the mounting portion of the tooth member, wherein the mounting portion of the tooth member detachably engages the holder such that when engaged, the at least one curved surface of the tooth member and the receiving portion curved surface contact each other at a contact area.

Abstract: A template for use in installing a plurality of foundation elements, in particular anchor piles, relative to one another in an underwater ground formation is provided. The template includes a plurality of guides for the foundation elements, which guides are fixed relative to one another by means of a frame. At least one of the guides includes a sound-insulating sleeve for surrounding a foundation element during driving.

Abstract: A tooth with a retaining system for retaining the tooth in a receiving portion of an adapter in a cutting system comprises a first holding system to releasably retain the tooth to the adapter; and a second holding system to tension and secure the tooth with respect to the adapter.

Abstract: A spud system for a dredging vessel with a longitudinal direction includes a spud carrier for mounting a spud therein in a vertical stance and which spud carrier is moveable with respect to the dredging vessel in a longitudinal direction for advancing the dredging vessel, a spud carrier drive system coupled with the dredging vessel and the spud carrier for driving the spud carrier with respect to the dredging vessel. The spud carrier drive system includes a hydraulic drive cylinder for controlling the position of the spud carrier. The spud system further comprises a hydraulic system comprising a parallel hydraulic cylinder in fluid parallel connection with the hydraulic drive cylinder and presstressing means coupled with a rod of the parallel hydraulic cylinder such that said rod is forced towards a central position.

Abstract: The invention relates to an upending system for an elongated tubular element like an offshore foundation pile or a turbine mast, the system comprising; a pile frame for supporting a elongated tubular element, the pile frame comprising a pile support member for engaging a pile wall in order to avoid movement of the elongated tubular element with respect to the pile frame, and a coupling section, a support structure for supporting the pile frame, wherein the coupling section is rotatably supported by the support structure to allow rotation of the pile frame with respect to the support structure, wherein the support structure and the coupling section of the pile frame are configured such that the pile frame is detachably coupled to the support structure.

Abstract: According to a first aspect of the invention, a tooth for a cutter head includes a tooth body portion for connecting to an adapter; and a pick point portion comprising an end portion with a substantially planar surface, sides extending in an outward direction from the end portion to the tooth body, and a front and/or back with curvature which expands in thickness from the end portion to the tooth body portion. The tooth body portion and the pick point portion have a rounded cross-section comprising a central beam with a bottom base extending perpendicular from the beam at a lower end of the beam and a top shoulder on an upper end of the beam.

Abstract: A method of forming a cutter head with an axis of rotation comprises forming a hub; forming at least one ring with integral cutter body arm segments extending from the at least one ring; and connecting the hub to the cutter body arm segments so that the hub and the at least one ring are connected and around the axis of rotation.

Abstract: A tubular foundation element, in particular a pile e.g. a jacket pile, to be installed in a ground formation has at least one open end, typically both ends open, allowing a pile driver with an anvil to be inserted into the tubular foundation element. The tubular foundation element comprises a support at the inside thereof, which support is adapted to transmit energy from the anvil directly to the tubular foundation element, during installation of the tubular foundation element.

Abstract: A measurement device for performing measurements on a mixture of water and collected material includes a pipe section through which the mixture can be guided. The pipe section includes a window. The measurement device further includes an image capturing device arranged to capture an image of the collected material through the window. The image can be used to determine a grain size distribution of the collected material, which can be used to optimize the collecting process.

Abstract: A method for deep sea mining includes generating an upward flow of valuable matter in a riser line from the bottom of a body of water to a matter processing platform; processing the matter at the processing platform; generating a return flow in a return pipe of a mixture of seawater and a non-valuable part of the matter from the processing platform towards the bottom of the body of water; and controlling the pressure in the return pipe for avoiding collapse of the return pipe and/or cavitation of the return pipe, in particular for avoiding collapse of or cavitation in an upper part of the return pipe.

Abstract: A blade for an impeller comprises a blade with a front portion with a leading edge and a trailing portion with a trailing edge joined by spaced apart pressure and suction sides to form an exterior blade surface. The blade pressure side is formed from an outer envelope of a first blade profile aligned in a first position; and at least a part of the front portion of the blade suction side is formed by rotating the first blade profile around the leading edge to match an angle of the incoming flow at a lower flowrate condition of the impeller.

Abstract: The invention relates to a lifting device for picking up a member from the bottom of the sea, the lifting device comprising; a body extending along a central axis of the lifting device and having means for connection to a hoist cable, a housing configured to be at least partially introduced into a cavity of the member to be picked up and accommodating at least a part of the body and wherein the body and the housing are moveable with respect to each other along the central axis of the lifting device.