A pile is moved downwards by a movable part inside a piling apparatus. An apparatus body is fastened to the pile by fastening elements, during piling the movable part inside the apparatus body is moved downwards, the movable part is stopped hydraulically by medium in a cylinder space without the movable part striking the apparatus body. As the downwards directed motion of the movable part is stopped, the apparatus body and the pile fastened to it jerk downwards, after which, the movable part is moved hydraulically upwards. The counterforce of the motion affects the apparatus body and the pile fastened to it by pushing them downwards. The piling apparatus includes hydraulic cylinder cylinder to the piston of which the movable part is fastened, and to the hydraulic cylinder are connected a pressure transformer, a damping apparatus and a set of control valves to stop the movable part hydraulically.

A hydraulic tool for the installation of fencing T-posts into the ground without bending the T-post or causing damage or deformity to the top of the T-post, installs to the three point hitch of a tractor with hydraulic connections to the tractor hydraulic system, securing the post along its vertical length prior to insertion into the ground, the tool having an upper stationary bracket holding an upper section of the T-post within a T-post slot and a lower sliding ram bracket securing to a lower section of the post, the lower sliding ram bracket forcing the T-post into the ground by use of a hydraulic ram at a chosen depth.

A driving cylinder of a pile driving rig includes a solenoid valve for controlling an operation of the driving cylinder, which solenoid valve, is a slide valve, which is located at least partly at a piston-side head of the driving cylinder, and a stem of the slide valve is at least partly outside an inner cylinder liner in a direction of motion of a piston part. Further disclosed is a pile driving rig comprising the driving cylinder according to the invention.

A driving cylinder of a pile driving rig includes a solenoid valve for controlling an operation of the driving cylinder, which solenoid valve, is a slide valve, which is located at least partly at a piston-side head of the driving cylinder, and a stem of the slide valve is at least partly outside an inner cylinder liner in a direction of motion of a piston part. Further disclosed is a pile driving rig comprising the driving cylinder according to the invention.

A hydraulic accumulator including an energy storage apparatus with a first piston face configured to reversibly compress an energy storage medium and a second piston face forming at least part of an inner surface of a corresponding second fluid chamber reversibly expandable by movement of the second piston face. A third piston face forms at least part of an inner surface of a corresponding third fluid chamber reversibly expandable by the third piston face. The first, second and third piston faces are coupled together.

A hydraulic accumulator including an energy storage apparatus with a first piston face configured to reversibly compress an energy storage medium and a second piston face forming at least part of an inner surface of a corresponding second fluid chamber reversibly expandable by movement of the second piston face. A third piston face forms at least part of an inner surface of a corresponding third fluid chamber reversibly expandable by the third piston face. The first, second and third piston faces are coupled together.

A self-contained soil stabilization system may include a chassis, at least one motor coupled to the chassis configured to actuate a locomotor configured to move the chassis, and a hopper disposed on the chassis and configured to contain a payload configured to stabilize soil. The payload may be deployed from the hopper to stabilize soil in a target soil stabilization area. In some embodiments, the payload may be a chemical soil stabilization agent, a pile, or a sheet pile.

A self-contained soil stabilization system may include a chassis, at least one motor coupled to the chassis configured to actuate a locomotor configured to move the chassis, and a hopper disposed on the chassis and configured to contain a payload configured to stabilize soil. The payload may be deployed from the hopper to stabilize soil in a target soil stabilization area. In some embodiments, the payload may be a chemical soil stabilization agent, a pile, or a sheet pile.

Disclosed embodiments include post driving implements which attach to a power machine such as a loader in order to pick up posts of various sizes and materials and/or to drive the posts into the ground. In some exemplary disclosed embodiments, the post driving implement allows a post to be picked up when positioned inline with a direction of power machine travel and allows the post to rotate under the force of gravity to a second position in which the post is inline with a pounding mechanism for pounding the post into the ground. Catch mechanisms can be included to capture a portion of the implement to maintain the post in the second position until a release action is taken or a release command is given.

Disclosed embodiments include post driving implements which attach to a power machine such as a loader in order to pick up posts of various sizes and materials and/or to drive the posts into the ground. In some exemplary disclosed embodiments, the post driving implement allows a post to be picked up when positioned inline with a direction of power machine travel and allows the post to rotate under the force of gravity to a second position in which the post is inline with a pounding mechanism for pounding the post into the ground. Catch mechanisms can be included to capture a portion of the implement to maintain the post in the second position until a release action is taken or a release command is given.