A lifting device and method for concrete elements

E - Fixed Constructions – 04 – G

Patent

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Details

E04G 21/14 (2006.01) B66C 1/54 (2006.01) B66C 1/66 (2006.01) B66F 19/00 (2006.01)

Patent

CA 2740498

A lifting device (110) for concrete elements such as bridge beam and deck elements, panels and the like up to and beyond 1,000 tonnes (t) is described. The lifting device may be suitable for face and edge lifting of concrete elements that have a suitable cavity formed within or through them. The lifting device (110) may include a lifting eye (116) connected to an elongate member / shank (114) that has a flared end (122). A sleeve (126) about the shank (114) may be used to raise and lower the moveably attached wedges (124) to and from the flared end (122). In use the wedges (124) upon the flared end (122) prevent the withdrawal of the lifting device (110) from the cavity of the concrete element. A cavity former is also described that may be used in the casting of the concrete element to form a suitable cavity.

Cette invention concerne un dispositif de levage (110) pour éléments en béton tels que des éléments de poutre ou de tablier de pont, des panneaux et assimilés pouvant atteindre un poids supérieur ou égal à 1 000 tonnes (t). Le dispositif de levage peut être adapté au levage par la face ou par la rive déléments en béton dans ou à travers lesquels est formée une cavité appropriée. Le dispositif de levage (110) peut comprendre un anneau de levage (116) relié à un élément/une tige allongé(e) (114) présentant un bout évasé (122). Un manchon (126) entourant la tige (114) peut être utilisé pour soulever et abaisser des cales (124) fixées de façon mobile, de sorte à les éloigner et les rapprocher du bout évasé (122). A lusage, les cales (124) sur le bout évasé (122) empêchent le retrait du dispositif de levage (110) de la cavité de lélément en béton. Cette invention concerne également un dispositif de formation de cavités pouvant être utilisé lors du moulage des éléments en béton pour former une cavité appropriée.

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