A method of rehabbing reinforced concrete pilings while in service and without the requirement to demo or otherwise gain access over the ends of an existing column. Design adopts modern environmentally responsible fiber reinforced polymer rebar and other FRP stirrups uniquely shaped into spiral sections requiring only side access for placement, designed to permanently encase the piling with a totally non-rusting non-metal reinforcement lateral containment cage featuring preformed circumference stirrups that mechanically interlock vertically and lateral adjustability to control density. The spiral stirrups extending fully 360-degrees around an existing piling with an additional overlap of at least 45 degrees.

Provided is an underwater repair system for a cavity region of a concrete panel rock-fill dam panel, including a moving platform, a work cabin, a pressure drainage apparatus, a traction apparatus, and a positioning apparatus; the traction apparatus controlling the movement of the moving platform on the surface of a dam concrete panel; the positioning apparatus transmits a detection position, the work cabin is a pressure cabin, the work cabin being connected to the pressure drainage apparatus, and a drill apparatus and grouting apparatus being arranged in the work cabin; the moving platform moves into the cavity region, and the pressure drainage apparatus starts up to drain the water in the work cabin, a partially closed waterless space being formed inside the work cabin, the drill apparatus drilling the concrete panel at the upper end of the cavity region and the grouting apparatus subsequently implementing grouting to complete the repair.

Provided is an underwater repair system for a cavity region of a concrete panel rock-fill dam panel, including a moving platform, a work cabin, a pressure drainage apparatus, a traction apparatus, and a positioning apparatus; the traction apparatus controlling the movement of the moving platform on the surface of a dam concrete panel; the positioning apparatus transmits a detection position, the work cabin is a pressure cabin, the work cabin being connected to the pressure drainage apparatus, and a drill apparatus and grouting apparatus being arranged in the work cabin; the moving platform moves into the cavity region, and the pressure drainage apparatus starts up to drain the water in the work cabin, a partially closed waterless space being formed inside the work cabin, the drill apparatus drilling the concrete panel at the upper end of the cavity region and the grouting apparatus subsequently implementing grouting to complete the repair.

A pier bracket comprises a seat including a base plate and an upper plate extending orthogonally from the base plate wherein, when the base plate is positioned for supporting a structure, the upper plate is adjacent to the structure for securing the upper plate to the structure. A tubular member is mounted to the seat and adapted to slidably receive structural piers. A planar support plate is distally spaced from and parallel to the base plate. Each of a pair of side plates extend between an opposite side edge of the base plate and the support plate.

A pier bracket comprises a seat including a base plate and an upper plate extending orthogonally from the base plate wherein, when the base plate is positioned for supporting a structure, the upper plate is adjacent to the structure for securing the upper plate to the structure. A tubular member is mounted to the seat and adapted to slidably receive structural piers. A planar support plate is distally spaced from and parallel to the base plate. Each of a pair of side plates extend between an opposite side edge of the base plate and the support plate.

An annulus excavation tool that would surround the decayed pole or pile and hydraulically excavate the annulus around the pole down to −2.0′ via a jetting manifold. A vacuum/tremie manifold is selectively coupled to a vacuum source to remove the soil and decayed material and creating a bonding surface for the mortar. The annulus tool would then be coupled to the mortar source and raised while a UHPC mortar would be tremied into the tool for delivery into the annulus. When the tool reaches ground level the rest of the pour is done using a Sonotube or other temporary form. This mortar encasement not only makes up for the structural deficiencies but also isolates the pole from both air and water which then kills the existing fungi and insects while also preventing any future invasion.

An annulus excavation tool that would surround the decayed pole or pile and hydraulically excavate the annulus around the pole down to −2.0′ via a jetting manifold. A vacuum/tremie manifold is selectively coupled to a vacuum source to remove the soil and decayed material and creating a bonding surface for the mortar. The annulus tool would then be coupled to the mortar source and raised while a UHPC mortar would be tremied into the tool for delivery into the annulus. When the tool reaches ground level the rest of the pour is done using a Sonotube or other temporary form. This mortar encasement not only makes up for the structural deficiencies but also isolates the pole from both air and water which then kills the existing fungi and insects while also preventing any future invasion.

A method for retrofitting a wind turbine foundation is provided. The foundation comprises a first substantially elongated pile (31) in the ground. The method further comprises: arranging a lower end of an elongated channel (41) of a second substantially elongated pile (40) around the first pile (31), wherein the elongated channel (41) extends substantially along a longitudinal direction of the second pile (40), wherein the channel (41) is configured to receive at least a portion of the first pile. The method further comprises lowering the second pile (40) such that the elongated channel (41) surrounds at least a portion of the first pile (31). Finally, the second pile (40) is driven into the ground (35).

A method for retrofitting a wind turbine foundation is provided. The foundation comprises a first substantially elongated pile (31) in the ground. The method further comprises: arranging a lower end of an elongated channel (41) of a second substantially elongated pile (40) around the first pile (31), wherein the elongated channel (41) extends substantially along a longitudinal direction of the second pile (40), wherein the channel (41) is configured to receive at least a portion of the first pile. The method further comprises lowering the second pile (40) such that the elongated channel (41) surrounds at least a portion of the first pile (31). Finally, the second pile (40) is driven into the ground (35).

A cutting tool adapter for creating an underpinning structure and method of creating the underpinning structure are provided. In some examples, the cutting tool adapter may connect a cutting tool to a working machine arm to enable the cutting tool to cut and dislodge soil below an existing foundation or structure. As the soil is cut and dislodged, it is mechanical mixed with an additive, such as a cementitious material, via the cutting tool. The mixed soil and additive may then harden in the area below the existing structure or foundation to create an underpinning structure to provide additional support for the existing structure or foundation.