A multi-function retaining structure for excavation and drainage operations during construction process and a method for excavation and implementation of a multi-function retaining structure at a target location. The multi-function retaining structure includes a first I-beam, a second I-beam, a third I-beam, a first inclined stiffener plate, and a second inclined stiffener plate. The method includes positioning the multi-function retaining structure above the target location, driving the multi-function retaining structure into the target location by pushing the bottom edge of the third web into the target location, softening soils in the target location by jetting water to the soils utilizing a first water jet tube and a second water jet tube, extracting the first water jet tube and the second water jet tube from the rectangular chamber, and draining water from the rectangular chamber by utilizing a water drainage pump and through a drainage tube.

A multi-function retaining structure for excavation and drainage operations during construction process and a method for excavation and implementation of a multi-function retaining structure at a target location. The multi-function retaining structure includes a first I-beam, a second I-beam, a third I-beam, a first inclined stiffener plate, and a second inclined stiffener plate. The method includes positioning the multi-function retaining structure above the target location, driving the multi-function retaining structure into the target location by pushing the bottom edge of the third web into the target location, softening soils in the target location by jetting water to the soils utilizing a first water jet tube and a second water jet tube, extracting the first water jet tube and the second water jet tube from the rectangular chamber, and draining water from the rectangular chamber by utilizing a water drainage pump and through a drainage tube.

A method for installing a pile, in particular a monopile for a wind turbine, in a soil, comprising the method steps: —driving the pile into the soil using a vibration device; and—compacting soil material surrounding a lateral surface of the pile.

Device for removal of sediment from inside piles being at least partly immersed in water, comprising an outer guiding unit arranged to be temporarily positioned on the top of a pile. The outer guiding unit envelopes at least one inner dredging unit being arranged to be lowered from within the outer guiding unit, the inner dredging unit at its lower end exhibiting movable jet nozzles arranged to loosen sediment. The inner dredging unit furthermore comprises a central passage which is connected to a discharge hose arranged to transport loosened sediment therefrom.

Device for removal of sediment from inside piles being at least partly immersed in water, comprising an outer guiding unit arranged to be temporarily positioned on the top of a pile. The outer guiding unit envelopes at least one inner dredging unit being arranged to be lowered from within the outer guiding unit, the inner dredging unit at its lower end exhibiting movable jet nozzles arranged to loosen sediment. The inner dredging unit furthermore comprises a central passage which is connected to a discharge hose arranged to transport loosened sediment therefrom.

A pile (100) includes a first elongated hollow body (101) having a first end and a second end, the first end being closed by an end member (103) provided with an opening (104). The pile (100) includes a second elongated hollow body (102) having a first end and a second end, the second elongated hollow body (102) being arranged inside the first elongated hollow body (101) so that the first end of the second elongated hollow body (102) extends through the opening (104) and is attached to the end member (103). A method is for installing a pile (100) into the ground.

A percussion device including an input side and an output side, the input side is configured to be rotationally driven and the output side is rotationally driven by the input side via a drive transmitter/drive transmitter pathway combination, where the percussion device includes a percussion impactor, an impactor shaft and a percussion anvil; in use, where the output side has restricted, or no, ability to rotate, the drive transmitter/drive transmitter pathway combination increases the distance between the percussion impactor and the percussion anvil until the drive transmitter/drive transmitter pathway combination releases the percussion impactor, where the percussion impactor includes at least one impactor impact tooth and the percussion anvil includes at least one anvil impact tooth, wherein each impact tooth includes an angled impact surface, such that complementary impact surfaces are configured to pass a percussive and/or rotational impulse from the percussion impactor to the percussion anvil.

A percussion device including an input side and an output side, the input side is configured to be rotationally driven and the output side is rotationally driven by the input side via a drive transmitter/drive transmitter pathway combination, where the percussion device includes a percussion impactor, an impactor shaft and a percussion anvil; in use, where the output side has restricted, or no, ability to rotate, the drive transmitter/drive transmitter pathway combination increases the distance between the percussion impactor and the percussion anvil until the drive transmitter/drive transmitter pathway combination releases the percussion impactor, where the percussion impactor includes at least one impactor impact tooth and the percussion anvil includes at least one anvil impact tooth, wherein each impact tooth includes an angled impact surface, such that complementary impact surfaces are configured to pass a percussive and/or rotational impulse from the percussion impactor to the percussion anvil.

A closed-loop feedback-control system for a screw anchor driving machine that uses a controller such as a programmable logic controller (PLC) and an array of sensors providing real-time data to control an automated screw anchor driving operation relying on a rotary driver, a crowd motor applying downforce to the rotary driver and a tool driver extending a tool through the rotary driver and screw anchor to drive screw anchors to a target depth. The tool driver is independently controllable to advance the tool at a different feed and speed than the rotary driver to respond to underground conditions encountered during driving.

A closed-loop feedback-control system for a screw anchor driving machine that uses a controller such as a programmable logic controller (PLC) and an array of sensors providing real-time data to control an automated screw anchor driving operation relying on a rotary driver, a crowd motor applying downforce to the rotary driver and a tool driver extending a tool through the rotary driver and screw anchor to drive screw anchors to a target depth. The tool driver is independently controllable to advance the tool at a different feed and speed than the rotary driver to respond to underground conditions encountered during driving.