An interconnectable hollow metal pipe for the construction of force driven piles is described. A pipe connector is permanently secured to one of opposed open transverse ends of the hollow metal pipe for interconnecting like pipes together. The pipe connector has an inner fitment section for engagement in the one of opposed open end and a protruding pipe connecting section for tight sliding fit connection in the other hollow open end of another interconnectable hollow metal pipe. The pipe connector has securement formations which in combination with the pipe open end, to which it is connected to, forms at least two spaced-apart weld cavities with an outer surface of the pipe to receive therein a recessed weld which does not exceed the pipe outer surface to provide an unobstructed pile outer surface by two or more of the interconnectable hollow metal pipes interconnected end-to-end by the connectors.

An interconnectable hollow metal pipe for the construction of force driven piles is described. A pipe connector is permanently secured to one of opposed open transverse ends of the hollow metal pipe for interconnecting like pipes together. The pipe connector has an inner fitment section for engagement in the one of opposed open end and a protruding pipe connecting section for tight sliding fit connection in the other hollow open end of another interconnectable hollow metal pipe. The pipe connector has securement formations which in combination with the pipe open end, to which it is connected to, forms at least two spaced-apart weld cavities with an outer surface of the pipe to receive therein a recessed weld which does not exceed the pipe outer surface to provide an unobstructed pile outer surface by two or more of the interconnectable hollow metal pipes interconnected end-to-end by the connectors.

A drill unit for forming a column in ground which includes an outer drill and a concentric inner drill, where attached to the outer drill there is at least one drill tooth which includes a first face, a second face and a base face wherein: the first face and the second face are immediately adjacent one another and are coterminous at a first edge and a second edge; the base face is the face closest to, or coterminous with, the first terminal end; all faces, except the base face, are independently coterminous with the base face; and extend away from the base face in the same direction; at least part of the at least one drill tooth extends away from the first terminal end to terminate at the second edge; the second edge is the edge of the at least one tooth that is most longitudinally distant from the first terminal end; the first face further includes a first alpha edge, where the first alpha edge is an edge of the first face opposite the first edge; a line joining the first edge and the first alpha edge, where the first face and the base face are coterminous, a first face alignment line, is at an angle of to a perpendicular extending from the first outside surface; the second face further includes a second alpha edge which is an edge of the second face opposite the first edge; and a line joining the first edge and the second alpha edge, where the second face and the base face are coterminous, a second face alignment line, is at an angle of to a tangent on the first outside surface; such that, when in use forming the column, the first edge is configured to be a leading edge.

A pile driving assembly for installing a pile in an underwater bottom comprises a tubular pile and a hammer for driving the pile into an underwater bottom. The assembly is provided with a soil remover for removing soil inside the pile. The soil remover is located below the hammer and remote from a lower end of the pile in assembled operating condition.

A pile driving assembly for installing a pile in an underwater bottom comprises a tubular pile and a hammer for driving the pile into an underwater bottom. The assembly is provided with a soil remover for removing soil inside the pile. The soil remover is located below the hammer and remote from a lower end of the pile in assembled operating condition.

The tie rod for structural projects for the protection of structures for earthquake and wind is comprised of a cast iron base (7) which has a bolt (4) passing through a hole, which is surrounded by threaded ring (5) with handles (6). A base plate (2) that sits on the bolt and turns with a ball bearing. A steel cable (9) passes through all; the one end of the cable is fixed to the base (2) with bolts (3). The other end leads to a member with blades around it (10), (12), (13), (14) which open and close around the member (17) with the help of bars (11) connected around the axis of the member with pins. To the other end, they are connected with pins to the blades. The rod presses the structure to the ground by a bolt connected to a cable which pulls a member (17) with blades which open against the sides of a hole drilled on the ground and pull the building towards the ground decreasing torque created by the forces of an earthquake or the wind. It is used on buildings with a frame, continuous building, wood frame houses with storm problems, cable bridges, loose ground slopes, etc.

Methods of lifting structures such as a wall of a building. A fluid that is under pressure is injected beneath the base of the wall. The pressure of the injected fluid acts against the base of the wall to lift the wall vertically. In some embodiments, a supplemental lifting force mechanism can be attached to the wall to apply a supplemental lifting force to the wall that acts together with the lifting force applied by the injected fluid. The supplemental lifting force lightens the wall, reducing the amount of lifting force required to be applied to the wall by the injected fluid.

Methods of lifting structures such as a wall of a building. A fluid that is under pressure is injected beneath the base of the wall. The pressure of the injected fluid acts against the base of the wall to lift the wall vertically. In some embodiments, a supplemental lifting force mechanism can be attached to the wall to apply a supplemental lifting force to the wall that acts together with the lifting force applied by the injected fluid. The supplemental lifting force lightens the wall, reducing the amount of lifting force required to be applied to the wall by the injected fluid.

An interconnectable hollow metal pipe for the construction of force driven piles is described. A pipe connector is permanently secured to one of opposed open transverse ends of the hollow metal pipe for interconnecting like pipes together. The pipe connector has an inner fitment section for engagement in the one of opposed open end and a protruding pipe connecting section for tight sliding fit connection in the other hollow open end of another interconnectable hollow metal pipe. The pipe connector has securement formations which in combination with the pipe open end, to which it is connected to, forms at least two spaced-apart weld cavities with an outer surface of the pipe to receive therein a recessed weld which does not exceed the pipe outer surface to provide an unobstructed pile outer surface by two or more of the interconnectable hollow metal pipes interconnected end-to-end by the connectors.

An interconnectable hollow metal pipe for the construction of force driven piles is described. A pipe connector is permanently secured to one of opposed open transverse ends of the hollow metal pipe for interconnecting like pipes together. The pipe connector has an inner fitment section for engagement in the one of opposed open end and a protruding pipe connecting section for tight sliding fit connection in the other hollow open end of another interconnectable hollow metal pipe. The pipe connector has securement formations which in combination with the pipe open end, to which it is connected to, forms at least two spaced-apart weld cavities with an outer surface of the pipe to receive therein a recessed weld which does not exceed the pipe outer surface to provide an unobstructed pile outer surface by two or more of the interconnectable hollow metal pipes interconnected end-to-end by the connectors.