The invention relates to a pile installation system for providing a pile in the ground, comprising; an elongate pile installation tool for forming a bore hole and having a distal end, an end member for coupling to the distal end of the pile installation tool, and an electromagnetic device for releasable magnetically coupling the end member to the pile installation tool.

The present invention provides a tool for forming an underground cast-in-situ pile having an enlarged base, the tool comprising: a first pile-forming member having a first base-forming member; a second pile-forming member having a second base-forming member, the pile-forming members extending collinearly and being movable in a longitudinal direction relative to one another between: a digging state wherein the base-forming members are proximate to one another so that the pile-forming members can be driven underground; and a base-forming state wherein the base-forming members are spaced from one another so as to form an underground void between the first and second base-forming members, the void being tillable with a flowable fill to form the enlarged base of the underground cast-in-situ pile; and jack screw means, rotation of which causes relative longitudinal movement between the pile-forming members.

A system for forming a piling structure includes a hollow casing, a control assembly positioned proximately to the hollow casing, and a pivoting support device connected to the control assembly. A pivoting electrode is connected to the pivoting support device and configured to extend into the hollow casing. A second electrode is connected to the control assembly and extends into the hollow casing within the range of motion of the pivoting electrode. An electric power source is connected to the pivoting electrode and the second electrode, wherein charge on the electrodes produces a current arc between the pivoting electrode and the second electrode. A lift mechanism is positioned proximately to the hollow casing to control the electrodes position within the hollow casing.

The present invention enables easy construction of a foundation pile having a rigid structure even at a site where a pile produced in a factory cannot be brought in. The tube 1 having a forming material filling port 1a at a top end and a closed bottom 1b at a bottom end is set in a suspended state, and foundation pile forming material 4 is filled from the forming material filling port 1a into the tube 1 in the suspended state. A composite foundation pile 5 in which the tube 1 and the filled forming material 4 are integrated is formed, and the composite foundation pile 5 is driven into the ground 13 or inserted into a borehole 12 formed on the ground 13.

Disclosed is a nesting element for use in a hollow pile. The nesting element is configured to be retained at an opening defined in a wall of the pile. The nesting element comprises a surface that is configured such that, in use, the surface substantially conforms to an internal profile at a transverse cross-section of the pile. Also disclosed are a pile system that employs one or more nesting elements in one or more respective piles, and an installation system for installing the pile system into the ground. Additionally, a method of constructing a retaining wall using the pile system and installation system is disclosed.

A system for forming a piling structure includes a hollow casing, a control assembly positioned proximately to the hollow casing, and a pivoting support device connected to the control assembly. A pivoting electrode is connected to the pivoting support device and configured to extend into the hollow casing. A second electrode is connected to the control assembly and extends into the hollow casing within the range of motion of the pivoting electrode. An electric power source is connected to the pivoting electrode and the second electrode, wherein charge on the electrodes produces a current arc between the pivoting electrode and the second electrode. A lift mechanism is positioned proximately to the hollow casing to control the electrodes position within the hollow casing.

The invention relates to a handling device for gripping and inserting a pile tube into a borehole in the ground to form a foundation pile, comprising a base frame, a gripping device for gripping and holding the pile tube, and a holding element for releasably connecting the base frame to a hoist, in particular a suspension rope. According to the invention, it is provided that at least one inlet device for supplying a curable medium is arranged on the base frame in an upper region and at least one outlet device for the curable medium to the pile tube is arranged in a lower region.

The invention relates to a construction machine for introducing a displacement tube into the ground, wherein the displacement tube comprises a tube base body and, at its lower end, a closure device which comprises at least one closure flap which is adjustable between a closed position, in which the displacement tube is closed downwards by the at least one closure flap, and an open position, in which filling material is discharged from the displacement tube into the ground for forming a filling material column, wherein the construction machine comprises a feed drive for introducing and retracting the displacement tube into and out of the ground, respectively. According to the invention, it is provided that an actuating unit with at least one pressing-on element is arranged on the construction machine, by means of which the at least one closure flap is adjustable from the open position into its closed position and retainable in said position before contacting the ground at least until the closed closure flap penetrates into the ground. The invention further relates to a method for creating a filling material column.

The present invention provides a wave-shaped grouting bulb (100) for securing an underground bearing capacity of a steel bar (10), the bulb comprising a plurality of protrusions (120), which have a predetermined maximum diameter (D1) and are formed along the longitudinal direction of a cylindrical pillar part (110) extending downward, wherein the neighboring protrusions (120) are formed to be spaced from each other by a predetermined formation distance (s). The present invention has an advantageous effect of improving a skin friction force and resistance to compression and pullout in the grouting bulb integrated with the steel bar and thus enhancing structural stability in the micropile body.

The present example provides a building foundation repair product that is a horizontally cast concrete product. Horizontal casting, unlike the typical vertical casting produces smooth end surfaces that aid in installing the building foundation repair product as the end surfaces are defined by the mold. Also, the building foundation repair product has been designed with flat surfaces that make up its sides. The flat surfaces advantageously tend to prevent the product from rolling when used at a job site, and allows the a building foundation repair product to be easily palletized for shipping, as they tend to be stable when stacked on the pallet.