An apparatus and a method for attenuating water pressure pulses generated during sea piling when a percussion mechanism is used, including the stage of driving at least one pile into an earth by a percussion mechanism, while along at least a part of its axial extension, the pile is surrounded by water and at least partly by a tubular outer sleeve; and at least one gas-filled space is provided between the inner periphery of the outer sleeve and the outer periphery of the pile. The apparatus includes mechanisms for providing the gas-filled space.

The invention relates to a method of operating a mobile work machine with a ground pressure limitation and to a corresponding work machine. A maximum permitted ground pressure is compared with an actually present ground pressure.

A pile guide is provided comprising a base frame and a pile guide member for guiding the pile as it is driven into a substrate when the base frame is resting thereon. The pile guide member comprises plural guide parts each moveable between a operative position and an inoperative position, each guide part being pivotally mounted on the base frame. At least one guide part is operably coupled or couplable with an associated counterweight for opening of the guide member to its inoperative position under gravity, such that, at least in an inoperative position, at least part of the counterweight and the associated guide part are movable with respect to each other. In another aspect, at least one of the guide parts and/or at least one of the counterweights is detachably connected with the base frame and/or with each other. Methods are also provided.

A pile guide is provided comprising a base frame and a pile guide member for guiding the pile as it is driven into a substrate when the base frame is resting thereon. The pile guide member comprises plural guide parts each moveable between a operative position and an inoperative position, each guide part being pivotally mounted on the base frame. At least one guide part is operably coupled or couplable with an associated counterweight for opening of the guide member to its inoperative position under gravity, such that, at least in an inoperative position, at least part of the counterweight and the associated guide part are movable with respect to each other. In another aspect, at least one of the guide parts and/or at least one of the counterweights is detachably connected with the base frame and/or with each other. Methods are also provided.

Disclosed is a water-permeable pipe pile system capable of accelerating soil consolidation. The system includes a hollow pile, an aerating device, and a drain device. Holes are evenly distributed on the wall of the pile, the bottom of the pile is closed, and a gas-tight gland is provided on the top of the pile. The aerating device includes a gas pipe and a gas pump, the lower end of the gas pipe passing through the gas-tight gland and extending into the cavity of the pile, and the upper end thereof connected to the gas pump. The drain device includes a drain pipe and a water pump, the lower end of the drain pipe passing through the gas-tight gland and extending towards the bottom of the cavity of the pile, and the upper end thereof connected to the water pump. Combining advantages of a water-permeable pipe pile and features of the high-pressure gas splitting technology, the water-permeable pipe pile system can accelerate dissipation of excess pore water pressure in the surrounding soil mass and rapidly increase the skin friction of the pile. Requirements on the bearing capacity of pipe piles and the service life of a construction are thus satisfied and desirable economic effects are achieved. Besides, the method of using the system is simple.

Disclosed is a water-permeable pipe pile system capable of accelerating soil consolidation. The system includes a hollow pile, an aerating device, and a drain device. Holes are evenly distributed on the wall of the pile, the bottom of the pile is closed, and a gas-tight gland is provided on the top of the pile. The aerating device includes a gas pipe and a gas pump, the lower end of the gas pipe passing through the gas-tight gland and extending into the cavity of the pile, and the upper end thereof connected to the gas pump. The drain device includes a drain pipe and a water pump, the lower end of the drain pipe passing through the gas-tight gland and extending towards the bottom of the cavity of the pile, and the upper end thereof connected to the water pump. Combining advantages of a water-permeable pipe pile and features of the high-pressure gas splitting technology, the water-permeable pipe pile system can accelerate dissipation of excess pore water pressure in the surrounding soil mass and rapidly increase the skin friction of the pile. Requirements on the bearing capacity of pipe piles and the service life of a construction are thus satisfied and desirable economic effects are achieved. Besides, the method of using the system is simple.

A pile plan map indicating a plurality of locations in a geographic area at which piles are to be installed is accessed. A first set of locations is identified from the plurality of locations and a first set of piles to be driven into the ground at the first set of locations using the pile plan map is identified. An order for driving the first set of piles into the ground is identified and a pile type for each of the first set of piles is identified. Basket assembly instructions are generated for assembling the first set of piles into a basket based on the identified order and the identified pile types. The first set of piles are assembled autonomously or manually into the basket based on the generated basket assembly instructions.

A pile plan map indicating a plurality of locations in a geographic area at which piles are to be installed is accessed. A first set of locations is identified from the plurality of locations and a first set of piles to be driven into the ground at the first set of locations using the pile plan map is identified. An order for driving the first set of piles into the ground is identified and a pile type for each of the first set of piles is identified. Basket assembly instructions are generated for assembling the first set of piles into a basket based on the identified order and the identified pile types. The first set of piles are assembled autonomously or manually into the basket based on the generated basket assembly instructions.

Extensible shells and related methods for constructing a support pier are disclosed. An extensible shell can define an interior for holding granular construction material and define a first opening at a first end for receiving the granular construction material into the interior and a second opening at a second end. The extensible shell can be flexible such that the shell expands when granular construction material is compacted in the interior of the shell. A method may include positioning the extensible shell in the ground and filling at least a portion of the interior of the shell with the granular construction material. The granular construction material may be compacted in the interior of the extensible shell to form a support pier.

Described is a vessel and device for upending an elongate element from a deck of the vessel using a lifting means. A number of support structures, mutually coupled and running parallel to each other, for supporting an elongate element in lying position can be displaced collectively, parallel to the deck, relative to the position of the lifting means by displacing means provided for this purpose. A support structure of the device includes an upending tool which is connected for pivoting around an axis running parallel to an edge of the vessel to the relevant support structure and is configured to support an elongate element received in the support structure when this element is upended with the lifting means, wherein the upending tool is rotated around the axis. With the device elongate elements can be moved within reach of a lifting means.