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Titre :
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Increased lateral abutment resistance from gravel backfills of limited width
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Auteurs :
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Kyle M. Rollins, Auteur ;
Travis M. Gerber, Auteur ;
Ku Hyun Kwon, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Journal of geotechnical and geoenvironmental engineering (Vol. 136 N° 1, Janvier 2010)
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Article en page(s) :
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pp. 230-238
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Note générale :
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Géotechnique
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Langues :
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Anglais
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Index. décimale :
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624.1 (Infrastructures.Ouvrages en terre. Fondations. Tunnels)
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Tags :
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Passive pressure Pile caps Gravel Load test Dynamic response
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Résumé :
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Lateral pile cap tests were performed on a pile cap with three backfills to evaluate the static and dynamic behavior. One backfill consisted of loose silty sand while the other two consisted of 0.91- and 1.82-m-wide dense gravel zones between the pile cap and the loose silty sand. The 0.91- and 1.82-m-wide dense gravel zones increased the lateral resistance by 75 to 150% and 150 to 225%, respectively, relative to the loose silty sand backfill. Despite being thin relative to the overall shear length, the 0.92- and 1.82-m-wide gravel zones increase lateral resistance to approximately 54 and 78%, respectively, of the resistance that would be provided by a backfill entirely composed of dense gravel. The dynamic stiffness for the pile cap with the gravel zones decreased about 10% after 15 cycles of loading, while the damping ratio remained relatively constant with cycling. Dynamic stiffness increased by about 10 to 40% at higher deflections, while the damping ratio decreased from an initial value of about 0.30 to around 0.26 at higher deflections.
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DEWEY :
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624.1
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ISSN :
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1090-0241
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En ligne :
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http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&smode=strresults&sort=chron&maxdisp=25&pjournals=JGGEFK&pyears=2010&possible1zone=article&fromyear=2010&frommonth=Jan&fromvolume=136&fromissue=1&OUTLOG=NO&sti=yes&viewabs=JGGEF
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