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.

Aspects herein relate to using motor velocity as feedback for controlling the extension or retraction of jacks for control of the angular orientation of a structure, or other means for accomplishing the same. Embodiments include a structure orientation control apparatus comprising one or more jacks configured to support a structure, one or more jack drive mechanisms coupled to at least one of the one or more jacks, the one or more jack drive mechanisms configured to extend or retract the one or more jacks, and a jack controller configured to cause the one or more jack drive mechanisms to extend or retract the one or more jacks based on a jack command. The jack controller may be configured to monitor one or more jack velocities during extension or retraction.

A method of repairing a tilt wall construction includes affixing a fixture at a bottom of the wall, installing a piling into the earth directly below the fixture, forming a support member having a link corresponding to a distance between the fixture and a head the piling, and affixing the support member to the fixture and to the head such that the piling supports the wall. The fixture is an angle member that is anchored to the wall. A plate is affixed onto a top surface of the head of the piling. The support member can include a pair of steel pipes that are welded at one end to the plate and an opposite end welded to the angle member.

A crane-free system for moving a pre-fabricated enclosure includes a beam system and a system of coordinated self-contained hydraulic jack units, which in conjunction allow a pre-fabricated enclosure to be lifted off a semi-trailer, positioned by rolling on the system of beams above a pre-laid foundation, and lowered to the foundation. Optionally, the sliding beam system may be rotated using rotatable rollers to allow the pre-fabricated enclosure to move in a rotated direction. Optionally, a centering device and hydraulic ram may be used to center the pre-fabricated enclosure on the foundation.

A lifting tower for use in the adjustment of the height of an attached structure. The tower uses rotational power means to raise and lower a lift, and an attached lifting beam, within the entire travel zone defined by vertical columns of the tower in a single stroke without the need for any intermediate recalibration of the tower. A system comprising a plurality of towers and a controller, as well as a method of use, are also disclosed.

Aspects herein relate to using motor velocity as feedback for controlling the extension or retraction of jacks for control of the angular orientation of a structure, or other means for accomplishing the same. Embodiments include a structure orientation control apparatus comprising one or more jacks configured to support a structure, one or more jack drive mechanisms coupled to at least one of the one or more jacks, the one or more jack drive mechanisms configured to extend or retract the one or more jacks, and a jack controller configured to cause the one or more jack drive mechanisms to extend or retract the one or more jacks based on a jack command. The jack controller may be configured to monitor one or more jack velocities during extension or retraction.

A control system for controlling the operation of a plurality of modular lifting units (12). The control system includes a power source (20) for providing power to each of the modular lifting units (12). A main control box connected between the power source (20) and the modular lifting units (12), comprises a mode switch (28) for switching the system between two control modes: a group mode, in which the plurality of modular lifting units (12) is controlled synchronously as a group; and, an individual mode, in which any one of the modular lifting units (12) is controlled independently of the other units. In group mode, synchronous movement of the modular lifting units is achieved by setting each unit to run at the same speed. The control system may also comprise one or more power extension control boxes (PECBs) (13) connected between an additional power source and a plurality of additional modular lifting units

A self-aligning and torque transmitting coupler assembly includes an outer coupler coupled to a first shaft of and an inner coupler coupled to a second shaft. The outer coupler comprises an inner surface having primary and secondary alignment and torque transmitting features, and the inner coupler comprises an outer surface having primary and secondary alignment features. The primary and secondary alignment features are configured to interlock and facilitate alignment of the first and second shafts along a common axis in an exemplary application of a foundation support system.

Aspects herein relate to using motor velocity (RPM) as feedback for controlling the extension or retraction of jacks for control of the angular orientation of a structure, or other means for accomplishing the same. Such includes a structure orientation control apparatus comprising one or more jacks configured to support a structure, one or more jack drive mechanisms coupled to at least one of the one or more jacks, the one or more jack drive mechanisms configured to extend or retract the one or more jacks, and a jack controller configured to cause the one or more jack drive mechanisms to extend or retract the one or more jacks based on a jack command. The jack controller monitors one or more jack velocities during extension or retraction.

A self-aligning and torque transmitting coupler assembly includes an outer coupler coupled to a first shaft of and an inner coupler coupled to a second shaft. The outer coupler comprises an inner surface having primary and secondary alignment and torque transmitting features, and the inner coupler comprises an outer surface having primary and secondary alignment features. The primary and secondary alignment features are configured to interlock and facilitate alignment of the first and second shafts along a common axis in an exemplary application of a foundation support system.