Abstract:
For rehabilitating sea floor around and under a potentially environmentally hazardous area such as shipwrecks including hazardous cargo or deposits of environmentally hazardous material, it may be used a layered bottom structure that may be placed on top of such polluted sea floor in lakes and oceans at and about areas, pockets or stores (1) of environmentally hazardous material(s), wherein said environmentally hazardous material(s) is in danger of leaking out to the surroundings. The layered structure comprises at least one layer of a mass on top of said area of environmentally hazardous material(s) including a viscous material (3,9) comprising sludge/earth/clay and including fine-graded particles impregnated with reactants that are able to react with the relevant environmental hazardous material(s) and bind and/or render these harmless. It is also disclosed a process for distributing such a layered structure.
Abstract:
Dumping vessel for dumping sinking particles like sand, blocks, rocks or stones onto the bottom of a lake or sea, comprising a floating hull and a fall pipe pending downwards towards the bottom, wherein the fall pipe comprises a lower dumping section, at least two hoisting cables that connect the dumping section with the hull, and a series of fall pipe sections between the hoisting cables that are stacked onto each other on the dumping section, wherein multiple fall pipe sections each comprise a tube and an upper connector and a lower connector at the ends of the tube, wherein the upper connector and the lower connector of subsequent fall pipe sections engage each other, wherein these fall pipe sections comprise at the upper connector a closure for confinement of one of the hoisting cables.
Abstract:
The present invention is defined as a construction method for maritime structures such as breakwaters, quay walls and general earth fills to which building materials are supplied using floating means (102). This is secured through the provision of a controlled movable and securely stabilised floating Workstation (100), which provides an area for the actions (107) of land-based type of construction equipment (902), (903), (904), (905), substituting the corresponding floating equipment. The movement (108), stabilisation, securing through all weather conditions of a continuous and unproblematic supply (106) of building materials using barges (102), as well as support for all the necessary auxiliary tasks of a construction site for maritime structures is done using special vessels (101).
Abstract:
A marine fall pipe system(100) is constructed for placing blocks of stone and/or rock(R) on a seabed(SB) and configured for suspension from a marine vessel(10). The fall pipe system comprisesa substantially tubular fall pipe(100) having an open end for discharging the blocks of rock and/or stone, and the fall pipe system comprises an opening arrangement constructed such as to allow opening the substantially tubular fall pipe to provide an intermediate opening(170) at a position along its length for discharging the blocks of stone and/or rock at said position from the fall pipe.The fall pipe may be locally discontinued by releasing one or more fall pipe segments(110) of the fall pipe,may comprisesfall pipe segmentswith weakened parts where they will break, or a fall pipe segment may be movable sidewards to provide theintermediate opening. Figure6b
Abstract:
The invention relates to a method for the containment of pollutants present in the aquatic environment and to a device for implementing same. According to the invention, a containment material (7) is poured over the pollutant (1) in order to cover same, said method comprising the following steps, namely: i) the in situ measurement or documentation of the surface and subsurface currents and assessment of sporadic events, such as storms, that affect the location of the pollutant (1) to be covered; ii) selection of the minimum grain size of the containment material (7); iii) determination of the amount of containment material (7); and iv) deposition on the pollution source of the containment material (7) formed by at least one continuous layer of sepiolite clay (2) having a sepiolite mineral content of between 25 and 100 %. In addition, a layer of granular material (3) can also be deposited thereon, said layer representing up to 99 wt.- % of the containment material (7). The device includes a rigid tube (5) which can be extended using a flexible tube (10) which is divided into sections that are separated by metal rings (9) supported by a steel cable (8).
Abstract:
The object of the invention is a system for removing oil from the surface of water, comprising a rotating gripping element (4) fitted in a casing (2) through which water polluted by oil flows, and a means (6) for removing the material collected in the gripping members (5). A tunnel structure (3) is fitted inside the casing (2), its inner diameter being about the same size as the greatest outer diameter of the gripping element (4). The gripping element (4) is coaxial with the tunnel structure (2). The tunnel structure (3) provides an effective direction of the water flow through it and the gripping members (5).
Abstract:
Method and device for applying a layer of material in or on a bed (2) of a river, lake, sea or the like. To this end, a fluid which contains the material is injected into or onto said bed. When the fluid is injected into the material of the bed (2), said bed material swirls up and may form a mixture with the material and the fluid. In order to ensure that said layer stabilises and then settles on the bed, especially when said method is used on slopes, it is proposed to provide a guide (5) following the distribution device. In this way, during the initial period following injection of the fluid, the cloud thus formed is able to shift position only to a limited extent and can precipitate in a controlled manner.
Abstract:
A sediment capping system (200) is adapted to create, and distribute, a homogenized mixture of capping material (101). Where distributing the capping material (101), the system (200) is configured to militate against the capping material (101) forming clumps of a size and weight that would disturb the sediment on a bottom of a body of water. This in turn militates against the sediment being disturbed, and a disturbing of pollutants and toxins into the water surrounding the sediment. The sediment capping system (200) militates against the clumping of capping material (101) through a vibrating spreader (100) and baffle system (134), producing a sediment cap (102) with a more consistent depth that will minimally disturb the sediment on the floor of the body of water where the sediment cap (102) is being deposited.
Abstract:
A hoisting system comprises a plurality of hoist elements to be hoisted; a winch system comprising a chain of links to allow hoisting hoist elements of the plurality of hoist elements, the links having a central opening; coupling members for coupling the hoist elements to the chain of links, each coupling member being secured to a hoist element and configured for providing releasable locking engagement with the chain of links; and a coupling station configured for guiding a hoist element and the chain of links through the guiding station and for automatically providing locking engagement of a coupling member secured to the respective hoist element to the chain of links or automatically releasing locking engagement of a coupling member secured to the respective hoist element from the chain of links. The coupling station may comprises a sprocket wheel for guiding the chain of links, and is configured for automatically providing locking engagement of the coupling member secured to the respective hoist element to the chain of links or automatically releasing locking engagement of the coupling member secured to the respective hoist element from the chain of links while the chain of links is guided over the sprocket wheel.