A foundation pile comprising a longitudinal through hole (1) and a plurality of crosswise through holes (2) transverse to longitudinal through hole (1) extending between longitudinal through hole (1) and the outer surface of the pile and optionally further comprising check valves positioned in the crosswise through holes (2), configured such that the crosswise through holes (2) and the check valves allow one-way communication from the inside of the pile to the outside of the pile from longitudinal through hole (1) to the outer side surfaces of the pile.

Provided is a support structure and a method for manufacture thereof. The support structure, in one aspect, includes first and second expanded metal structural pillars positioned within the ground by a distance (d.sub.1), the first and second expanded metal structural pillars comprising a metal that has expanded in response to hydrolysis. In at least one other aspect, the support structure includes one or more beams spanning the first and second expanded metal structural pillars.

The invention relates to a pile joint, which comprises a first concrete pile, a second concrete pile, and a coupling system therebetween for connecting and locking the concrete piles relative to each other. The coupling system includes a lock housing and a lock spindle connectible to each other and provided with transverse holes in such a way that the lock housing's transverse holes and the lock spindle's transverse hole settle substantially in line with each other for receiving a locking pin when the lock housing and the lock spindle are connected to each other. In addition, the lock housing is provided with a locking ring for retaining the locking pin in a position locking the lock housing and the lock spindle to each other. For ensuring the pipe joint's installation and durability there is in alignment with a first transverse hole of the lock housing a guidance pipe and in alignment with a second transverse hole of the lock housing, opposite to its first hole, a locking seat closed at one end and intended for the locking ring. The locking ring is adapted to be movable in a groove included in the locking seat and the locking pin is provided with a recess in the lengthwise direction of the locking pin to receive the locking ring.

Provided is a support structure and a method for manufacture thereof. The support structure, in one aspect, includes first and second expanded metal structural pillars positioned within the ground by a distance (d.sub.1), the first and second expanded metal structural pillars comprising a metal that has expanded in response to hydrolysis. In at least one other aspect, the support structure includes one or more beams spanning the first and second expanded metal structural pillars.

A grout plug assembly for use in forming a pipe pile system defining at least one pile assembly inner surface portion comprises a resiliently deformable plug body defining a plug outer surface, a plug inner surface, a first plug end surface, a second plug end surface. The plug inner surface defines a plug passageway. The plug outer surface is sized and dimensioned to engage the at least one pile assembly inner surface portion of the pipe pile system during formation of the pipe pile system.

An underpinning pile assembly for supporting a structure upon the earth has a plurality of pile segments, a cable extending through a continuous passageway of the plurality of pile segments, and an anchor assembly positioned at the top of the plurality of pile segments. Each of the plurality of pile segments is stacked one upon another. The cable has a lower end affixed to one of the plurality of pile segments. The anchor has an opening that receives a portion of the cable therein so as to fix a position of an upper end of the cable. The anchor assembly has at least one column extending upwardly from an upper surface thereof. An adjustable support is affixed to the column and has a surface opposite the column that is adapted to support the structure thereon.

A monopile comprising a body (1) having a hollow interior, a toe (9) at a distal end for insertion into a soil (19) during monopile installation, and a proximal end region (2) for supporting a structure (7), such as a wind turbine tower, once the monopile has been installed. The body (1) further comprises a door aperture (12) provided in the body (1) for accessing the interior of the body (1). The door aperture (12) is configured to receive a door assembly (6,18) once the monopile (1) has been installed.

A pile shoring wall includes tangent concrete piles that are formed in the ground at an excavation site. The tangent concrete piles include a plurality of a first type of concrete piles in the ground at depths wherein the average depth is d.sub.1 and a plurality of a second type of concrete piles. The second type of concrete piles includes 10% and less than 50% of the tangent concrete piles, and each have a shaft of a helical pile secured therewithin. Each helical pile has a bottom portion with helical flights for screwing the helical pile into the ground, and each helical pile is set into the ground to a depth of at least about 2 m below d.sub.1. The helical flights of each helical pile are exposed to the surrounding soil and increase resistance below an excavation depth when the site is excavated.

A pile shoring wall includes tangent concrete piles that are formed in the ground at an excavation site. The tangent concrete piles include a plurality of a first type of concrete piles in the ground at depths wherein the average depth is d.sub.1 and a plurality of a second type of concrete piles. The second type of concrete piles includes 10% and less than 50% of the tangent concrete piles, and each have a shaft of a helical pile secured therewithin. Each helical pile has a bottom portion with helical flights for screwing the helical pile into the ground, and each helical pile is set into the ground to a depth of at least about 2 m below d.sub.1. The helical flights of each helical pile are exposed to the surrounding soil and increase resistance below an excavation depth when the site is excavated.

A recyclable pile foundation is provided. The recyclable pile foundation includes several inner cylinders, several outer cylinders and several reciprocating components which are circumferentially distributed between the inner cylinders and the outer cylinders. Each reciprocating component includes several steel collars, a push-pull rod, a hold component and at least one motion component. The motion components are distributed along the push-pull rod. Each motion component includes at least one triangular connection plate, several connection rods, an inner wedge block, an outer wedge block, a motion block and a pointed rod. When the push-pull rod is pushed along its own axis to the pushed position, the pointed rod protrudes from the outer cylinders to increases the friction between the surrounding soil and the recyclable pile foundation. When the push-poll rod is pulled along its own axis to the pulled position, the pointed rods retract back into the outer cylinders.