United States Department of Transportation
i
Lateral capacity of rock sockets in limestone under cyclic and repeated loading.
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2010-08-01
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[PDF-2.07 MB]
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OCLC Number:671237950
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Edition:Final report; July 2008--July 2010.
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Soils and Geology
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Abstract:This report contains the results from full scale lateral load testing of two short rock socketed shafts in
limestone, and the development of recommendations for p-y analysis using those results. Two short shafts 42
inches in diameter were constructed to depths of approximately seven feet in limestone in Wyandotte County,
Kansas. The shafts were loaded laterally during three separate test events in 2009. The shafts were tested
under cyclic loading (load reversal) at loads up to 400 kips; repeated loading up to 800 kips, and to failure near
1000 kips.
Test data showed that shaft behavior was essentially elastic during cyclic loading for loads of 400 kips
and lower (40% of ultimate capacity). The shafts experienced permanent, accumulating deformations during
repeated loads of 600 and 800 kips.
Modeling of the results showed the lateral load behavior could be effectively modeled in LPILE using the
“weak rock” model included with LPILE software.
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