The object of the invention is a multichamber structural element manufacturing method which for forming a multichamber structural element with chamber profiles (1) extending radially from the center defined by the connection of the chamber profiles (1) comprises the following steps: at least three chamber profile preforms (2) are provided, wherein each chamber profile preform (2) comprises two walls (3) made of a sheet of metal material and arranged with respect to each other in substantially parallel planes with a gap retained between them, wherein the edges of the individual walls (3) converge, and wherein a valve element (6) is arranged on at least one wall (3); the unconnected wall (3) edges of each of the chamber profile preforms (2) are sealed with a seal (5) for forming a closed hermetic empty inner space of the chamber profile preform (2); a fluid under pressure is introduced through the valve element (6) into the inner space of the chamber profile preform (2) for forming a deformed chamber profile (1), at least three chamber profile preforms (2) or chamber profiles (1) are connected in the area of the corresponding inner edges of the chamber profile preform (2) or the chamber profile (1), proximal with respect to the connection axis (4), along at least part of the inner edges. The object of the invention is also a multichamber structural element.

The invention comprises a concrete form. The form comprises a first concrete forming panel having a first primary surface adapted for forming and contacting plastic concrete and a second primary surface opposite the first primary surface; a layer of insulating material contacting and substantially covering the second primary surface of the first concrete forming panel; and an insulating blanket adjacent the first concrete forming panel. A method of using the concrete form is also disclosed.

The invention comprises a concrete form. The form comprises a first concrete forming panel having a first primary surface adapted for forming and contacting plastic concrete and a second primary surface opposite the first primary surface; a layer of insulating material contacting and substantially covering the second primary surface of the first concrete forming panel; and an insulating blanket adjacent the first concrete forming panel. A method of using the concrete form is also disclosed.

A method and apparatus for forming cemented ground support columns is disclosed. Namely, driving mandrels are provided for the efficient construction of incrementally enlarged diameter support columns. For example, the driving mandrel includes a feed tube that has a top portion and an expansion head portion. The expansion head portion further includes an expansion (or compaction) chamber and a flexible tubular egress port. Further, construction methods are provided of using the driving mandrels for the efficient construction of incrementally enlarged diameter support columns.

A method and apparatus for forming cemented ground support columns is disclosed. Namely, driving mandrels are provided for the efficient construction of incrementally enlarged diameter support columns. For example, the driving mandrel includes a feed tube that has a top portion and an expansion head portion. The expansion head portion further includes an expansion (or compaction) chamber and a flexible tubular egress port. Further, construction methods are provided of using the driving mandrels for the efficient construction of incrementally enlarged diameter support columns.

A large diameter single-piece thermoplastic concrete forming tube with axially spaced and integrally formed fully encircling circumferentially continuous radially rigidifying ribs, and method of forming a concrete column employing the tube.

A method for construction using a panel and plank system that may optionally be made of Aerated Autoclaved Concrete (AAC), wherein wall panels are delivered, erected and attached to structural forms and braced with properly designed shoring/struts with form ties and specifically designed “panel ties”. Intermediate bracing is installed at midspan locations where spans are short and there is a possibility of wall buckling. Floor/roof planks are set on top of the walls being cognizant of bearing surface requirements. The deformed and post-tension reinforcing steel is set/installed and any miscellaneous detailing is completed. Thin AAC panels can be installed as form liners for added insulation where dimensions accommodate them. Structural grout or small aggregate concrete is placed, consolidated/vibrated, and finished and allowed to cure to minimum required strengths. Roof pours are given a “crown” to allow proper drainage.

A method for construction using a panel and plank system that may optionally be made of Aerated Autoclaved Concrete (AAC), wherein wall panels are delivered, erected and attached to structural forms and braced with properly designed shoring/struts with form ties and specifically designed “panel ties”. Intermediate bracing is installed at midspan locations where spans are short and there is a possibility of wall buckling. Floor/roof planks are set on top of the walls being cognizant of bearing surface requirements. The deformed and post-tension reinforcing steel is set/installed and any miscellaneous detailing is completed. Thin AAC panels can be installed as form liners for added insulation where dimensions accommodate them. Structural grout or small aggregate concrete is placed, consolidated/vibrated, and finished and allowed to cure to minimum required strengths. Roof pours are given a “crown” to allow proper drainage.

Systems, methods, and articles of manufacture provide for a mold system for molding structures (e.g., sand castles) from one or more various types of molding substances (e.g., sand, clay, snow). In one embodiment, a mold system comprises a split mold comprising at least two mold sections. In one embodiment, a modular mold system allows for different types of mold sections with corresponding joining elements to be joined together to create forms for molding various types of structures. In some embodiments, mold sections are configured to facilitate the breaking of a vacuum created when molding substances are packed into the mold system, thus making it easier to separate a mold from the formed structure.

A method and an article of manufacture are disclosed for constructing, reinforcing, and repairing various structural elements such as columns, piles and the like using formworks that are reusable. The reusable articles of manufacture employed in the disclosed methods are or, if desired, may be permanently left in place. Same or similar methods and articles of manufacture may be employed to easily construct pipes of any desired diameter in a very short time.