Experimental investigation of grouted helical piers for use in foundation rehabilitation

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dc.contributor.author Bian, Yueying
dc.contributor.author Hutchinson, Tara C. (Tara Crystal)
dc.contributor.author Wilson, Dan
dc.contributor.author Laefer, Debra F.
dc.contributor.author Brandenberg, Scott
dc.date.accessioned 2010-07-14T16:09:42Z
dc.date.available 2010-07-14T16:09:42Z
dc.date.copyright 2008 ASCE en
dc.date.issued 2008-09
dc.identifier.citation Journal of Geotechnical and Geoenvironmental Engineering en
dc.identifier.issn 1090-0241
dc.identifier.uri http://hdl.handle.net/10197/2166
dc.description.abstract Building rehabilitation is critical for numerous older urban areas, many of which have inadequate foundations to support new demands. Consequently, development of practical methods to strengthen existing foundations is crucial. In engineering practice, both subsurface grouting and helical piers have been widely used to address these issues by strengthening the foundation. If the solid shaft of a typical helical pier is replaced by a hollow shaft, then helical piers provide the ability to deliver grout. It is hypothesized that these grouted helical pier systems (GHPS) could address foundation strengthening needs. This paper presents findings from an exploratory research program where grouting and pier placement tools were developed and tested on the large geotechnical centrifuge at the University of California, Davis. Experimental methods and procedures developed are presented, and observations regarding the formation of grout bulbs under different conditions are analyzed. Physical observation of the test specimens indicates that average grout bulb diameters of 0.6-1.9 times the helix diameter (Dh) are attainable. For similar grout mixes, 20-50% larger grout bulbs can be attained by adding just a modest amount of injection pressure. Future research may use these results to develop load performance data. en
dc.description.sponsorship Not applicable en
dc.format.extent 494442 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher American Society of Civil Engineering (ASCE) en
dc.subject Grouting en
dc.subject Piers en
dc.subject Centrifuge models en
dc.subject Rehabilitation en
dc.subject Deep foundations en
dc.subject.lcsh Grouting en
dc.subject.lcsh Piers en
dc.subject.lcsh Foundations--Maintenance and repair en
dc.title Experimental investigation of grouted helical piers for use in foundation rehabilitation en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions Publisher's version en
dc.internal.webversions http://dx.doi.org/10.1061/(ASCE)1090-0241(2008)134:9(1280) en
dc.status Peer reviewed en
dc.identifier.volume 134 en
dc.identifier.issue 9 en
dc.identifier.startpage 1280 en
dc.identifier.endpage 1289 en
dc.identifier.doi 10.1061/(ASCE)1090-0241(2008)134:9(1280)
dc.neeo.contributor Bian|Yueying|aut| en
dc.neeo.contributor Hutchinson|Tara C. (Tara Crystal)|aut| en
dc.neeo.contributor Wilson|Dan|aut| en
dc.neeo.contributor Laefer|Debra F.|aut| en
dc.neeo.contributor Brandenberg|Scott|aut| en
dc.description.othersponsorship National Science Foundation en
dc.description.admin ti, sp, ke.kpw6/7/10 Include in Urban Institute en


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