Synthetic deformed bars/post tensioned threadbars and retaining walls

a technology of post tensioning and deformation bars, which is applied in the direction of foundation engineering, artificial islands, building components, etc., can solve the problems of adding structure costs and excessive localized stresses, and achieve the effect of eliminating or minimizing subsequent structure modifications and avoiding costly modifications

Inactive Publication Date: 2016-11-17
BABCOCK JOHN W
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a post tension plate / nut anchor assembly that can compensate for slight placement errors and can be moved to the correct anchor location within reasonable tolerances. This allows for proper alignment of the threadbars and reduces the need for costly modifications. The invention also includes a variable position post tensioned anchor assembly that can be cast into the foundation at locations that closely correspond to the post-tension duct locations within the stems of the tees. The anchor plate / nut assembly can be horizontally repositioned following the curing of the concrete foundation, compensating for minor placement errors. The invention offers the advantage of future adjustment of the position of the anchor assembly and minimizes subsequent structure modifications should placement tolerances be exceeded.

Problems solved by technology

Should errors occur in the placement process, substantial retrofitting and possibly a re-pour of a portion of a foundation would be necessary.
Erroneous field situations then would both delay and add costs to the structure.
Therefore accurate placement of the post tensioning anchors for structures like these is critical since any mis-alignment could result in excessive localized stresses at the component interface connection.

Method used

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  • Synthetic deformed bars/post tensioned threadbars and retaining walls
  • Synthetic deformed bars/post tensioned threadbars and retaining walls
  • Synthetic deformed bars/post tensioned threadbars and retaining walls

Examples

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Embodiment Construction

[0023]A partially constructed post-tensioned adjacent double tee earth retaining wall assembly 830 is depicted in the isometric sketch in FIG. 800. Variable location post tension plate anchor assemblies 850 are shown cast into a cast in place concrete footing 821. Post tension threadbars 832 are shown placed into the variable location post tension plate anchor assemblies 850. The end adjacent tee 827 is shown as it would appear during a typical erection sequence with the post tension threadbars 832 inserted into the stem threadbar ducts 857 located in the tee stems 824. The tees 827 are held in an essentially vertical position after the stem threadbar nuts 846 are threaded onto the post tension threadbars 832. The post tensioned adjacent double tee post-tensioned adjacent double tee earth retaining wall assembly 830 as completed is able to structurally resist the earth loads placed on the wall (not shown) following the post tensioning of the post tension threadbars 832. The wall bac...

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Abstract

A limited displacement, variable location, post tension anchor assembly wherein a post tension thread bar (or a thread bar attached to an SDB) can be displaced following the encapsulation of the anchor assembly in concrete. The displacement movement is in a plane perpendicular to the axis of the thread bar and is limited to the size of the anchor enclosure assembly enclosure. This device provides a mechanism to compensate for placement errors that can occur for field placement of post tension anchor assemblies in concrete structures that heretofore have been unavailable. In addition, following the correct positioning of the thread bar, there is a mechanism provided to allow for remote pressure grouting of the assembly.

Description

CONTINUITY[0001]This application claims the benefit of U.S. provisional patent application No. 60 / 261,486, Doc. No. 7291 filed Jan. 13, 2001, and is a continuation-in-part of PCT patent application number PCT / US01 / 05733, filed Feb. 22, 2001, which designates the United States of America and claims the benefit of U.S. provisional patent application No. 60 / 184,049, filed Feb. 22, 2000. This application also claims the benefit of U.S. patent application Ser. No. 10 / 047,080 filed on Jan. 14, 2002. This application additionally claims the benefit of U.S. patent application Ser. No. 10 / 342,758 filed on Jan. 14, 2003. This application claims the benefit of U.S. patent application Ser. No. 10 / 758,601 filed on Jan. 14, 2004. This application also claims the benefit of U.S. patent application Ser. No. 11 / 300,055 filed on Dec. 14, 2005. These patent applications are incorporated by reference herein in their entirety.BACKGROUND[0002]There are currently numerous methods available to increase the...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): E02D29/02E04C5/16E04C5/07
CPCE02D29/0283E02D29/02E02D29/0233E04C5/07E04C5/162E02D29/0275E02D5/80
InventorBABCOCK, JOHN W.
OwnerBABCOCK JOHN W