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Footing form

A formwork and footing technology, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as uneconomical, impractical formwork, high installation and/or excavation costs, etc.

Inactive Publication Date: 2007-03-28
BIGFOOT SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, since the vertical position of this transition zone depends on the height of the footing formwork, forms with large footings and side angles of 45° or more are impractical and uneconomical due to higher installation and / or excavation costs

Method used

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Embodiment Construction

[0018] Although this structural limitation has been discussed in the prior art, it is now surprisingly found that as long as the other structural limitations of the template follow a certain precise relationship, the template with a sidewall angle of less than 45° will It can reliably fill up to about 3000 pounds per square inch (psi) of concrete mix. Through extensive research, the applicant has improved certain structural relationships, that is, if the structural relationship is strictly followed, even if the side angle is less than 45°, or even as low as about 30°, it can still allow the prefabricated formwork to be reliably filled up to 4500 psi Inch of concrete mix without the need to vibrate the concrete. However, if improvements to these structural constraints are not followed, the template will not be filled correctly, or even more severe results may occur, such as template collapse.

[0019] Figure 1 shows a perspective view of a first embodiment of a prefabricated footin...

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PUM

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Abstract

A prefabricated concrete form (10) for the pouring of a footing for a structural pillar is disclosed. The form is preferably constructed from a thermoplastic such as a high density polyethylene or ABS and is molded as a single disposable unit. The form is bell-shaped. The form is in particular a low profile form wherein the sidewall (17) is inclined at and angle below 45 degree relative to the bottom edge. A top flange (22) of the form is preferably adapted to accommodate two or more different diameters of the tubular form for the structural pillar. The sidewall may include integral ribs (28) which open inwardly to facilitate evacuation of air as the form is filled and to lend rigidity to the sidewall. The sidewall may further include vent openings for the escape of air which is possibly temporarily entrapped during filling of the form.

Description

Technical field [0001] The present invention relates to concrete formwork for materials such as concrete, polymer concrete, etc., and particularly relates to formwork for molding the footings of structural columns used in the construction industry. Background technique [0002] The use of structural columns made of concrete materials is well known and widely practiced in the construction industry. Such columns are generally poured into tubular column templates made of spiral wrapping paper, although other prefabricated column templates are well known and are commonly used for this purpose. According to most building codes, structural columns must be supported by footings, which are positioned below the level of the maximum frozen soil depth and are usually set on a coarse-grained aggregate roadbed to ensure adequate drainage. This footing, usually also made of concrete material, provides support for the column and its load. Traditionally, wooden footing templates built on site ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/44E02D27/42
CPCE02D27/42E02D5/44
Inventor K·斯维尼默
Owner BIGFOOT SYST