Static molds – In situ construction engineering type or building type-mold... – Forming building structure
Patent
1984-07-06
1985-09-10
Hoag, Willard E.
Static molds
In situ construction engineering type or building type-mold...
Forming building structure
E04G 1122, E04G 1128
Patent
active
045401500
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to self elevating formwork installations with variable geometry for making concrete walls, in particular walls of great height, these walls being formed by successive lifts of constant height, carried out practically simultaneously, successively or in blocks over the whole length of the work until the desired height is obtained, this installation comprising essentially means for temporarily fixing working platforms over an underlying part of the wall already cast and hardened, means for shuttering the next lift over said underlying part, and elevating means adapted to provide self elevation of the whole of the working platforms.
The aim of the present invention is to provide such an installation which allows thin walls made from self stable reinforced concrete to be erected better and more rapidly than the installations known up to present, and in particular walls of great height with a generally circular cross section and with evolutive geometry, as in the case in particular of high cooling towers in the form of hyperbolids of revolution.
Such an installation will then have to allow the construction of the formwork forming the mold for giving to the wall the desired shape, and it will further have to allow means to be obtained for the support and self elevation of the different scaffoldings giving access to all the parts of the work under construction, and all the necessary operations to be carried out, namely reinforcement, shuttering, concrete work as well as the control of all the moving mechanical parts.
In particular, an installation in accordance with the invention will also have to allow the extremely accurate adjustment of the different slopes of the wall to be formed, by actuating means for adjusting the successive and relative slopes of the different elements of the shutter work.
As for the assemblies of the working platforms, they will have to be also very simply adaptable to the variations of the radius of the curvature of the work under construction, this radius of curvature undergoing extremely large variations from the base to the top of the tower under construction.
All these aims, as well as others which will appear from reading the following description, are attained by means of an installation of the general type defined at the beginning in which, in accordance with the present invention will be essentially characterized in that said fixing means comprise series of main uprights extending substantially in vertical planes, these series being evenly spaced apart along the length of the wall, said main uprights serving essentially, on the one hand, as elements for maintaining in position the forms of the shutter work, and, on the other hand, as means for guiding and securing mobile self elevating brackets supporting said working platforms.
Hereagain, the following description better reveals how the aims sought may be attained with the above generally defined means.
In any case an essential arrangement of the present invention such as defined above and which largely contributes to reaching these aims, resides in the multiple role played by what was designated above by the name "main uprights", these uprights serving on the one hand as evolutive supports for the shutter work elements and on the other hand as guide and securing means for the mobile self elevating brackets, which support the working platforms.
According to an essential complementary arrangement of the present invention, in each series of main uprights it is provided that all uprights, except for the upper upright, are anchored in the cast and hardened concrete of a certain number of preceding lifts.
This arrangement will guarantee an excellent fixing of the series of main uprights on the already hardened concrete, which is essentially for the safety of the personnel, as well as for the accuracy in positioning the shutter work.
The evolutive character of the uprights, namely their ability to be appropriately orientated in the radial direction will result in the complementary arrangement according t
REFERENCES:
patent: 2649643 (1953-08-01), Schutte
patent: 3705776 (1972-12-01), Johansson
patent: 4060358 (1977-11-01), Fougea
patent: 4166603 (1979-09-01), Ward
Entreprise Generale Industrielle
Hoag Willard E.
LandOfFree
Self elevating formwork installation with variable geometry for does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self elevating formwork installation with variable geometry for , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self elevating formwork installation with variable geometry for will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1424335