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Load and deformation response of tieback walls.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Load and deformation response of tieback walls./
Author:	Mueller, Christopher G.
Description:	1 online resource (554 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 62-09, Section: B.
Contained By:	Dissertations Abstracts International62-09B.
Subject:	Civil engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9780599976436

Load and deformation response of tieback walls.
Mueller, Christopher G.

Load and deformation response of tieback walls. - 1 online resource (554 pages)

Source: Dissertations Abstracts International, Volume: 62-09, Section: B.

Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000.

Includes bibliographical references

Observations from large-scale model and full-scale tests were used to examine tieback wall behavior. Sources of wall deformation and the lateral and axial thrusts that develop during construction were considered. The model test walls comprised soldier piles and lagging with reasonable simulation of field construction. Wall stiffness and axial capacity were varied so that a range of behavior could be studied. Model- and full-scale test measurements indicate a pattern of wall movement that consists principally of a cantilever above the upper level of tiebacks, lateral bulging below the support, and outward rotation about the toe. The significance of cantilever type movements and lateral bulging depends on the relative stiffness of the ground with respect to the wall, and correspondingly, increase with the length of unsupported span and decreasing wall stiffness. Outward rotation of the walls examined correlated with pile settlements resulting from progressive redistribution of axial load and development of downdrag. Other potential sources of rotation include load increase in the tiebacks, load redistribution along the anchor length, and mass movements behind the anchors. Wall movements resulting from these sources generally appear to be comparatively small. Lateral pressures in the soldier piles are conditioned principally by tieback prestressing, with small changes with subsequent excavation. A balanced symmetric trapezoid of pressure provides reasonable interpretations of the distribution of lateral forces to the tiebacks and toe of a wall, where multiple levels of tieback support are utilized. For walls with a single level of support, an unbalanced trapezoid of pressure can be considered. Axial loads in the soldier piles develop due to tieback prestressing and downdrag. The significance of the contribution from downdrag depends upon the available axial capacity of the piles and stiffness of the ground. Downdrag can be relieved during subsequent excavation by relative downward movement of the wall with respect to the ground, as may occur when the limiting axial capacity of the pile toe is reached. The settlements resulting from redistribution of axial load must be carefully considered with respect to wall performance.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9780599976436Subjects--Topical Terms:

561339
Civil engineering.
Subjects--Index Terms:

Axial loadsIndex Terms--Genre/Form:

554714
Electronic books.

Load and deformation response of tieback walls.
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502 $a Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000.
504 $a Includes bibliographical references
520 $a Observations from large-scale model and full-scale tests were used to examine tieback wall behavior. Sources of wall deformation and the lateral and axial thrusts that develop during construction were considered. The model test walls comprised soldier piles and lagging with reasonable simulation of field construction. Wall stiffness and axial capacity were varied so that a range of behavior could be studied. Model- and full-scale test measurements indicate a pattern of wall movement that consists principally of a cantilever above the upper level of tiebacks, lateral bulging below the support, and outward rotation about the toe. The significance of cantilever type movements and lateral bulging depends on the relative stiffness of the ground with respect to the wall, and correspondingly, increase with the length of unsupported span and decreasing wall stiffness. Outward rotation of the walls examined correlated with pile settlements resulting from progressive redistribution of axial load and development of downdrag. Other potential sources of rotation include load increase in the tiebacks, load redistribution along the anchor length, and mass movements behind the anchors. Wall movements resulting from these sources generally appear to be comparatively small. Lateral pressures in the soldier piles are conditioned principally by tieback prestressing, with small changes with subsequent excavation. A balanced symmetric trapezoid of pressure provides reasonable interpretations of the distribution of lateral forces to the tiebacks and toe of a wall, where multiple levels of tieback support are utilized. For walls with a single level of support, an unbalanced trapezoid of pressure can be considered. Axial loads in the soldier piles develop due to tieback prestressing and downdrag. The significance of the contribution from downdrag depends upon the available axial capacity of the piles and stiffness of the ground. Downdrag can be relieved during subsequent excavation by relative downward movement of the wall with respect to the ground, as may occur when the limiting axial capacity of the pile toe is reached. The settlements resulting from redistribution of axial load must be carefully considered with respect to wall performance.
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650 4 $a Mechanical engineering. $3 557493
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