Abstract: Methods are provided for repairing an existing structure to cover at least a portion of the existing structure with a repair structure. Such methods comprise mounting one or more standoff retainers to the existing structure; coupling one or more standoffs to the standoff retainers such that the standoffs extend away from the existing structure; coupling one or more cladding panels to the standoffs such that the panels are spaced apart from the structure to provide a space therebetween; and introducing a curable material to the space between the panels and the existing structure, the panels acting as at least a portion of a formwork for containing the curable material until the curable material cures to provide a repair structure cladded, at least in part, by the panels. Corresponding apparatus for effecting such methods are also provided.
January 30, 2015
Date of Patent:
June 7, 2016
CFS Concrete Forming Systems Inc.
George David Richardson, Semion Krivulin, Jorge Ricardo Rosas-Gracida, Zi Li Fang
Abstract: Disclosed is a two-way pre-stress system for applying pre-stress to a member of a structure by a pre-tendon method, the system comprising: a mold for forming the member, the mold having a concrete pouring space; a supporter installed outside the mold; at least one horizontal tendon installed in the mold in a horizontal direction; a horizontal tendon settling device installed at the supporter, for settling the horizontal tendon in the mold; at least one vertical tendon installed in the mold in a vertical direction; a vertical tendon settling device installed at the supporter, for settling the vertical tendons in the mold; and a bending device installed at the supporter and combined with at least one of the vertical tendon, for forming a bent portion in at least one vertical tendon in a deep portion of the member.
June 4, 2008
Date of Patent:
November 8, 2011
Dong-Ok Kang, Man-Geun Yoon, Hyun-Yang Shin, Yeong-Seon Kim
Abstract: Supporting girder for floor slab formwork. The invention relates to a formwork system comprising a supporting girder for the support girders that receives the support of floor slab formwork boards. The upper face of said supporting girder is provided with a plurality of successive housings for receiving the girders, arranged one after another forming a series of housings along the entire length of said upper face without interruption, such that the girders can be transversely arranged and, where appropriate, overlapped with one another for their extension, in any position along the supporting girder. The housings furthermore have identical transverse dimensions, therefore the supporting girders can also be overlapped with one another to extend their length.
Abstract: An upper-bearing typed movable formwork used for cast-in-situ of concrete box girder in bridge engineering, comprising left and right legs (7) which are respectively fixed on a pier, left and right longitudinal/transverse sliding mechanisms (9), bearing devices and a template system.
July 30, 2009
June 9, 2011
Shunquan Qin, Tao Ma, Sen Yao, Bin Zhu, Rongchun Guo
Abstract: A system for forming thin-wall pre-cast concrete forms and structures, using vertical casting and slip-form techniques to partition wet concrete into separate thin-wall sections, the system being particularly useful for fabricating pre-cast concrete column forms having a composition and vertical consistency substantially the same as the integral poured concrete core of the finished concrete column.
Abstract: The present invention relates to a method and structure for reinforcing a corrugated steel plate structure. The present invention provides a method of reinforcing a corrugated steel plate structure using a liner provided on one surface of a corrugated steel plate, the reinforcing method using the liner comprising: an anchor bolt installing step of forming an anchor bolt insert hole in the surface of the corrugated steel plate and installing an anchor bolt in the anchor bolt insert hole such that the upper end of the anchor bolt protrudes from the surface of the corrugated steel plate to a predetermined height; a reinforcing bar installing step of fastening a reinforcing bar to the anchor bolt using a wire; a mold installing step of mounting a mold to the anchor bolt using a nut such that the reinforcing bar is covered with the mold; a concrete placing step of placing concrete inside the mold; and a mold removing step of removing the mold after the placed concrete has been cured.
December 19, 2006
December 18, 2008
FIXON E&C CO., LTD.
Hyeon-Kuk Kim, Byung-Gun Jung, Seung-Ho Kim
Abstract: The invention concerns a method for the reinforcement of a concrete beam, where the reinforcement comprises reinforcement rods which extend longitudinally and transversely and are locked at their mutual points of intersection. The invention consists of placing at least one reinforcement rod in an undercut corner in a cutout along outer sides of assembly frames disposed transversely to the reinforcement rods in that the assembly frames are two longitudinal girders and two transverse girders. A reinforcement rod may be locked with a spring shackle deformed for gripping around the reinforcement rod and one of the girders.
Abstract: A method of constructing a suspended floor is described in which a plurality of beam-forming formwork assemblies are located in substantially parallel alignment, the beam-forming formwork assemblies are supported in support assemblies on a support base in stable equilibrium, a plurality of floor-forming formwork assemblies are located between the beam-forming formwork assemblies for support thereon, concrete is poured in said formwork assemblies, the concrete is allowed to set, and the formwork assemblies are removed from the set concrete for re-use.
Abstract: The present invention is an apparatus and method for a multimodal electromechanical insect known as an entomopter. The entomopter is a species of micro air vehicle (MAV), which is defined as a flying vehicle having no dimension greater than 15 cm. The entomopter mimics the flight characteristics of an insect by flapping wings to generate lift. The entomopter's wings are powered by a reciprocating power source. The same power source may be used to power legs to enable the entomopter to crawl along the ground. In a preferred embodiment, the power source is a compact noncombustive engine known as a reciprocating chemical muscle (RCM).
Abstract: The invention provides a bulkhead forming system and method for forming a bulkhead. The bulkhead forming system comprises a number of individual forming members which are coupled together end to end and opposing each other to provide a gap therebetween on which the concrete is poured. The individual forming members consists of straight side forming members, 90.degree. internal angles, 90.degree. external angles, and other angled matched pair forming members, each of the said forming member having a substantially deep continuously concave indentation extending horizontally through the forming member, resulting in a substantially sideways U-shaped cross-section. Each surface of the bulkhead forming member is provided at an angle at which the frame can be easily released from the bulkhead once cured. The resulting freestanding bulkhead provides a useful walkway or work surface. Pilings may be driven into soil and placed between the opposing frames to provide additional stability or to create a boat lift.
Abstract: There is disclosed concrete form apparatus comprising three elongated panels with sides hingedly connected and a method of using such apparatus to enable one to repair reinforced concrete slats in the floor of an animal pen by breaking away the concrete of a damaged slat while leaving any reinforcing bars within such slat and arranging the foldable three-part form apparatus to create a trapezoidal concrete form into which one pours a concrete mix and allows it to become firmly self-supporting before removing the form by lowering it to an unfolded position and drawing it up between two slat positions. In the event one wishes to proceed to replace most or all of the slats of an animal pen floor slab, it is accomplished by breaking out and reforming alternate ones of said slats in a first forming and pouring operation and subsequently, after those slats have become firm, performing the same procedure on the remaining set of alternate slats.
Abstract: A support form for use in the casting of a grade beam on piles comprises an elongate rectangular body having a width equal to the intended width of the grade beam. The body is located under the intended grade beam and the grade beam cast on top of the form. The form is manufactured from polystyrene foam which is cut to form interior voids extending longitudinally of the body. The body prevents soil from entering the area underneath the grade beam. The body is formed with side walls having a wedging action and a collapsible central support so that a top wall of the body can collapse onto the bottom of the body if the forces from the soil due to exansion exceed a predetermined maximum force thus preventing the soil from causing heaving of the grade beam after installation.
September 10, 1992
Date of Patent:
August 23, 1994
Aerofoam Chemicals, Division of Border Chemical Company
Abstract: The invention is a molded plastic void hold down device utilized in concrete beams to restrict and hold down the vertical and lateral movement of voids placed within the concrete beam during construction. In particular, the hold down device comprises a molded plastic structure that includes a lower flange that extends over a top portion of the void, a coupling sleeve integrally formed with the lower flange and extending upwardly therefrom for frictionally coupling to the lower end portion of a down rod, and a web integrally formed with both the coupling sleeve and the lower flange and extending outwardly from opposite sides of the coupling sleeve.
Abstract: A beam clamp system for securely engaging a pair of concrete form panels for maintaining them in generally vertical position against inadvertent dislodgment or dislodgment due to outward pressure from recently poured liquid concrete. Each clamp has a horizontal portion and two long vertical members, brackets to slidably engage concrete form panels, and rods to securely and adjustably hold these form panels in place while concrete is poured and is curing. The form panels include a frame and a sheet with at least one smooth synthetic surface. In addition, this system includes a scaffolding system built into the beam clamp system. The system also includes a hanger system for supporting and positioning "re-bar" between the concrete form panels while liquid concrete is being poured and while it cures. Also a shepherd crook-shaped truss strap is part of the system and attaches to the "re-bar" hangers and the re-bar.
Abstract: An arrangement for casting in a mould of so-called battery design longitudinal concrete bodies with a high degree of linearity. The moulds consist of pipes of substantially circular cross-section, these being placed on top of beams which, within a frame, extend parallel to the longitudinal sides of the frame. The beams constitute lower casting boundaries in the process of casting and each two adjacent pipes constitute two lateral boundary sides in the process of casting. The underside of each mould pipe is levelled and provided with a longitudinal rail of upside-down T-shape, which is cut out at several points and at mutually identical distances. A plurality of plates each with a Y-shaped recess are placed between the top edges of the beams and at the same distances as the cut out rails. The recess matches the leg of the T-rail, and pipes are rigidly secured atop the beams by joined T-rails and plates.
February 5, 1987
Date of Patent:
August 21, 1990
Permaban Southeast, Inc.
Stig-.ANG.ke Ljungkvist, Lennart Johansson
Abstract: A mold for forming concrete having a bottom, a pair of side walls and a pair of end walls, all of plastic, and with the side walls and bottom being of integral one-piece construction and hinged together by living hinges defined by reduced thickness of the plastic panel. The ends walls are shaped with generally U-shaped channels dimensioned to lock onto the ends of the bottom and side walls whereby a watertight concrete mold is formed. The concrete mold is assembled by pivoting the side walls to an upright position relative to the bottom by means of the living hinges and the end walls are then secured to the bottom and side walls. The mold can be disassembled for removal of a formed concrete specimen by removal of the end walls and pivoting the side walls downwardly to a generally coplanar relation with the bottom to expose the test specimen for removal.
Abstract: A concrete slab and beam forming system including first and second shoring towers that are adjustable in height and which can be adjusted to provide for concrete beams of different depths. The forming system also includes a first plank with an integral facing, and second and third planks having integral facings which are pivotally attached at opposite ends of the first plank and which rest upon adjacent shoring towers in a first position in which the facings of all the planks are substantially coplanar. The planks are provided with bolts for releasably securing the second and third planks in that first position and operable to allow the second and third planks to be pivoted to a second position in which the facings of the second and third planks are substantially perpendicular to the facing of the first plank.
Abstract: A gang form in which a single or a plurality of precast concrete beams will be molded at one time, the gang form comprising a first and two second vertical walls, the first wall being a straight wall, the two second walls spaced apart one from another extend transversely away from the first wall while having an end abutting the first wall, a tier or tiers of precast concrete beams being molded by placing fluid concrete into a mold compartment comprising the top surface of either a starter slab or a previously precast beam, a longitudinal segmental strip of a vertical surface of the first wall or the vertical surface of a previously constructed tier and an individual mold side member, which side member is restrained by restraint means placed exterior of said mold compartment, the restraint means allowing the individual mold side member to be adjusted vertically while also being adjusted horizontally at various distances apart from a face of the first wall, the precast concrete beams while molded in their mold
Abstract: A beam form and slab form adjustment structure adapted for detachable mounting to a shoring frame of generally standard construction. Existing shoring frames with the present adjustment structure are useful in supporting and precisely aligning beam and slab forms relative to the vertical columns of a building. The adjustment structure includes a hinge arrangement enabling the associated shoring frame to retract so that the beam and slab forms can be moved for reuse at the next concrete pouring station.
Abstract: A metal "U" shape channel form is used to form a concrete beam, and has two laterally opposed outwardly extending horizontally disposed flanges with two supporting areas arranged in a stepped fashion for selectively supporting a metal deck or both a metal deck and plywood between the span of adjacently arranged channel forms used to form a slab therebetween, which slab may be composite in that the formed slab integrally includes a metal deck. A "U" shape shoring head of complementary shape to the channel form is mounted on a shoring frame to hold the channel form in place for the pouring of the concrete, and a shoring head can be used with a structural member arranged to support the metal deck of variable spans for slabs of variable dimensions in the available space.
Abstract: Proposed is a method for the erection of structures, such as bridges, that display pre-fabricated concrete beams, according to which the individual pre-fabricated beams are produced, on the spot, on a feed rigging within the corresponding work area of the structure, in a heated and laterally tiltable form. After removal from the form, the thusly produced pre-fabricated beams are transferred sidewardly into their final position by means of gantry cranes. During concretizing of the individual pre-fabricated beams, flexure of the feed rigging carrying the form is equalized in continuous fashion, in correspondence with the progressing, concretizing process, by transfer pumping of ballast liquid.
Abstract: A portable system for making harped, reinforced concrete beams includes a series of inverted T-shaped concrete bed sections, with aligned longitudinally extending holes for receiving tensioning cables to hold the sections together, to provide two beds, one on either side of the center wall of the sections, to make the concrete beams. At points near the center of each beam to be formed, arrangements for "harping" or depressing the longitudinally extending tensioning steel strands or cables are provided.
Abstract: An adjustable formwork for forming the corner surfaces of concrete structural members includes a first and a second formwork unit. Each formwork unit extends transversely of the other and has a surface which forms one of the concrete surfaces of the concrete structural members and these surfaces define a corner junction line about which the formwork units can be pivotally adjusted relative to one another. One of the formwork units is provided with a circular-arc shaped guide slot and the other has a pair of spaced guide pins secured to it with the pins being movably guided in the slot. The center point of the arc of the slot is located on the corner junction line. The interengagement of the pins with the slot affords a link type guidance between the formwork units. As a result, forces are transmitted at the corner junction line only in the assembly state so that the line lies practically in the plane of the formwork surface which define the concrete surfaces.
Abstract: A new and novel process for constructing longitudinal concrete members such as beams by providing a longitudinal sack like mold constructed from a pliable sheet or sheets having an open throat supported by an open rim frame in turn supported by a plurality of inverted "U" shaped supports spaced apart one from another while in a common straight alignment while the supports rest upon an equipment base. The concrete members being either removed from the sack like mold, or the member being a cast in place member with the mold acting as a casing or protective skin. The sack like mold being a hybrid sling because of being provided with a long under loop support on which the loop portion of the true sling rests.
Abstract: Apparatus to bear the coffering for the pouring of concrete up or against profiled piles used for waterworks, for the reinforcement of steep banks, quay walls, ducdalves etc. The poured concrete is beared by a coffering support composed of a component pinched horizontally and laterally in a rigid way in the notches of the profiled piles and this longitudinally to the curtain of sunken piles.
Abstract: In a formwork system frames are mounted between horizontal supports. The support means on the frames are offset relative to the horizontal axis so that the inversion of the frames enables the level of the upper surface thereof to be adjusted. Thus the same components can be used to make a formwork for fine finish concrete or standard finish. In an alternative embodiment the support means on the horizontal support is offset so that the adjustment can be effected by reversing the support.
Abstract: A cast concrete form work apparatus for constructing bridge beams in which form work partitions 5, 6 and 10, 11 having work surfaces 6, 12 are tangentially adjoined by a tube member 1 and adjustable apparatus is provided to hold in a fixed angular relation two work partitions by use of a clamping bar 13 and clamp screw 14 extending through a slot 16 together with a groove member 2, 3, 4 having a seal 21. Complementary constructions assembled as a pivotal arrangement provide a form work for constructing bridge beams with an upper surface disposed for use as inclined roadway.
Abstract: Block-forming means or shuttering apparatus for precast units of especially long dimension along one axis, a horizontal basic frame and two block-forming or shuttering walls of which are means for at least one is guided slidably being selectively adjustable along the basic frame to change the mutual distance between the two shuttering walls, piston and cylinder assemblies 16 for driving of said sliding guided means, and clamping means 19 for clamping together one of the slidable shuttering walls and the basic frame.
Abstract: A lightweight, take-down beam form, including a series of U-frames held together by spaced apart adjustable longitudinal braces secured along the frame uprights and bottom longitudinal braces, support strippable plywood or plastic or suitable material beam forming sheets. The U-frames are bolted together for easy and quick assembly and easy disassembly when in place on a cured concrete beam, permitting easy release of the forming sheets from completed and cured concrete beams. For normal use, the form strips from a set beam as a modular unit. For some purposes, such as for spandrels, one or both sides could be released for the removal of the form.
Abstract: A lightweight, very strong form of a concrete beam includes a plurality of U-shaped brace members having vertical, lightweight steel deck sheets secured to the uprights thereof, a strippable, non-stick, plastic liner for contacting the concrete of the beam and a rigid foamed plastic filling the space between the liner and the steel sheets, so that it supports the weight of the concrete poured onto the strippable, plastic liner. A column form is arranged to mate with the beam form, and the beam form may be used to mate with flying deck forms producing an integral, combined column, beam and deck structure. The forms are arranged for easily joining short beam sections to make long beam forms, and to join columns and floor decks with a smooth joint requiring no finishing. The strength of the beam forms reduces the quantity of supports necessary to hold the weight of the forms and poured concrete, and their configuration provides easy and quick stripping of the forms from the set concrete.
Abstract: Concrete structural members are cast in a metal mold form which comprises side members closed off by a horizontally extending resilient pallet. The side members have affixed thereto at their lower ends adjustable swivel arm actuating mechanisms adapted to flex the side members laterally away from one another to enable stripping of the cast member from the form. The resilient pallet forms the bottom surface of the mold form and etablishes a seal to prevent slurry leakage. The pallet is supported by a roller transfer assembly that enables the cast member to be transported to another operating station after the cast member has been stripped from the form. The transfer assembly is adjustable in height by means of a swing arm assembly which in addition to setting the depth of the casting also causes the cast member to be elevated clear of the form to enable it to be removed therefrom.
Abstract: Mold apparatus for the manufacture and molding of structural members such as I-beams and concrete girders which has a permanent pallet supported and maintained in a level condition by parallel beams affixed to a concrete base. The pallet is made up of a plurality of sections mounted on the beams and aligned and rigidly connected together. A pair of side forms are provided on the pallet which are readily removable and replaceable by other forms depending upon the particular structure being molded, each such form having a horizontal foundation part which extends to the edge of the pallet where a strip is welded to position the mold as desired on the pallet. The inner portion of the foundation part merges with a molding part extending upwardly in each form and terminating in an upper flange extending horizontally and outwardly at the top of the form. A plurality of vertical stiffener plates connect the various parts of each form to provide rigidity.
Abstract: Cast panels for building assembly and erection are formed and cured through the use of an apparatus which particularly facilitates high rates of production of such panels and thereby facilitates more economical building construction practices. Fluid materials being cast into panels are received within forms which comprise a cured concrete bed defining a horizontal planar surface maintained at an elevated temperature. Following curing of the fluid materials cast into the forms, stripping of the panels from the form is facilitated by vertically movable side forming members and by bulkheads separating the cured materials into predetermined panel lengths.