A pile-driver assembly for driving a pile into the ground is disclosed. The assembly includes a casing defining a chamber configured to house a fluid; a positioning element configured to position the casing at or on the pile; and actuating means. Actuation of the actuating means displaces the chamber relative to the positioning element such that the chamber moves away from the pile to an elevated position. The actuating means is configured to release the chamber from the elevated position for displacement towards the pile such that a force is exerted by the chamber on the positioning member, to controllably drive the pile into the ground. The assembly further includes buffering means, the buffering means being configured to controllably buffer the force exerted by the chamber on the pile as the pile is driven into the ground. The buffering means is configured to rebound the chamber to a rebound position. Further actuation of the actuating means displaces the chamber relative to the positioning element, such that the chamber moves from the rebound position to the elevated position. A control system for controlling the pile-driver assembly and a method of driving a pile into ground using the pile-driver assembly are also disclosed.

A pile-driver assembly for driving a pile into the ground, preferably offshore, and a method of driving a pile into the ground using the pile-driver assembly is disclosed. The assembly includes a casing defining a chamber, the chamber being configured to house a fluid. The assembly further includes a positioning element configured to position the casing at or on the pile, wherein at least a portion of the positioning element is positioned between the chamber and the pile. The assembly further includes actuating means, wherein actuation of the actuating means displaces the chamber relative to the positioning element, such that the chamber moves away from the pile, and wherein the actuating means is configured to release the chamber for displacement towards the pile such that a force is exerted by the chamber on the positioning member, to controllably drive the pile into the ground.

A pile-driver assembly for driving a pile into the ground is disclosed. The assembly includes a casing defining a chamber configured to house a fluid; a positioning element configured to position the casing at or on the pile; and actuating means. Actuation of the actuating means displaces the chamber relative to the positioning element such that the chamber moves away from the pile to an elevated position. The actuating means is configured to release the chamber from the elevated position for displacement towards the pile such that a force is exerted by the chamber on the positioning member, to controllably drive the pile into the ground. The assembly further includes buffering means, the buffering means being configured to controllably buffer the force exerted by the chamber on the pile as the pile is driven into the ground. The buffering means is configured to rebound the chamber to a rebound position. Further actuation of the actuating means displaces the chamber relative to the positioning element, such that the chamber moves from the rebound position to the elevated position. A control system for controlling the pile-driver assembly and a method of driving a pile into ground using the pile-driver assembly are also disclosed.

A pile driving method for driving a pile, e.g. a hollow and open ended pile, e.g. a large diameter pile having an outer diameter of at least 5 meters, e.g. a monopile of an offshore wind turbine, into the soil, e.g. into the seabed. Use is made of a pile driving system which comprises a drive head member that is configured to engage the pile, and a solid mass drop weight assembly comprising a support structure and comprising solid drop weight elements supported by said support structure, preferably solid steel drop weight elements being composed of steel elements, e.g. stackable steel elements, which drop weight elements have a total mass of at least 100 tonnes, e.g. more than 500 tonnes, e.g. more than 1000 tonnes, e.g. more than 2000 tonnes, which drop weight assembly is vertically mobile relative to, e.g. above, the drive head member. Further use is made of a lift system that is configured to bring the drop weight assembly into an initial height position relative to the drive head, and a quick release system adapted to effect quick release

A pile driving method for driving a pile, e.g. a hollow and open ended pile, e.g. a large diameter pile having an outer diameter of at least 5 meters, e.g. a monopile of an offshore wind turbine, into the soil, e.g. into the seabed. Use is made of a pile driving system which comprises a drive head member that is configured to engage the pile, and a solid mass drop weight assembly comprising a support structure and comprising solid drop weight elements supported by said support structure, preferably solid steel drop weight elements being composed of steel elements, e.g. stackable steel elements, which drop weight elements have a total mass of at least 100 tonnes, e.g. more than 500 tonnes, e.g. more than 1000 tonnes, e.g. more than 2000 tonnes, which drop weight assembly is vertically mobile relative to, e.g. above, the drive head member. Further use is made of a lift system that is configured to bring the drop weight assembly into an initial height position relative to the drive head, and a quick release system adapted to effect quick release

A construction machine for special civil engineering has a leader on which an advancing carriage is guided, which carriage has a holder for a work device, in particular a drilling rig or pile-driving implement, and which can be moved along the leader by way of a first advancing cable (upper cable) and a second advancing cable (lower cable), by way of a drive winch or a drive cylinder, wherein the advancing carriage is connected with the advancing cables and wherein at least one of the advancing cables is attached to a fixed point on the leader and/or the advancing carriage, wherein at least one fixed point is formed by a cable tensioner attached to the leader or the advancing carriage. At least one cable tensioner includes a tensioning drum on which an end-side section of an advancing cable is attached with multiple cable windings.

A construction machine for special civil engineering has a leader on which an advancing carriage is guided, which carriage has a holder for a work device, in particular a drilling rig or pile-driving implement, and which can be moved along the leader by way of a first advancing cable (upper cable) and a second advancing cable (lower cable), by way of a drive winch or a drive cylinder, wherein the advancing carriage is connected with the advancing cables and wherein at least one of the advancing cables is attached to a fixed point on the leader and/or the advancing carriage, wherein at least one fixed point is formed by a cable tensioner attached to the leader or the advancing carriage. At least one cable tensioner includes a tensioning drum on which an end-side section of an advancing cable is attached with multiple cable windings.

Certain exemplary embodiments can provide a system comprising a frame, which comprises an outer mast and an inner mast. The outer mast slides along the inner mast. A motor is coupled to the frame. A hydraulic system is coupled to the motor. A jackhammer head is coupled to the outer mast, which outer mast allows the jackhammer head to float up and down on the inner mast as the jackhammer head reciprocates. Thereby vibrations from jackhammer motion substantially do not get transferred to the frame.

Certain exemplary embodiments can provide a system comprising a frame, which comprises an outer mast and an inner mast. The outer mast slides along the inner mast. A motor is coupled to the frame. A hydraulic system is coupled to the motor. A jackhammer head is coupled to the outer mast, which outer mast allows the jackhammer head to float up and down on the inner mast as the jackhammer head reciprocates. Thereby vibrations from jackhammer motion substantially do not get transferred to the frame.

Embodiments of the present disclosure generally relate to a pumping unit base and methods for operating with the pumping unit base. The pumping unit base may include a plurality of driven piles installed in the ground, and a metal platform fixedly attached to the plurality of driven piles, wherein the metal platform is positioned above the ground. The metal platform may be removed from the driven piles and reinstalled to the driven piles.