Lateral capacity of rock sockets in limestone under cyclic and repeated loading.

671237950Final report; July 2008--July 2010.PDFTech ReportK-TRAN: KU-09-6C1756Load factorShaft sinkingDeformation curveRocksLimestoneLoad testsKansasKansas. Dept. of TransportationParsons, Robert L.Willems, IsaacPierson, Matthew C.Han, JieUniversity of Kansas. Dept. of Civil, Environmental and Architectural EngineeringKansas. Dept. of Transportation. Bureau of Materials & ResearchNTL-HIGHWAY/ROAD TRANSPORTATION-Soils and GeologyUS Transportation CollectionThis report contains the results from full scale lateral load testing of two short rock socketed shafts inlimestone, and the development of recommendations for p-y analysis using those results. Two short shafts 42inches 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 testedunder cyclic loading (load reversal) at loads up to 400 kips; repeated loading up to 800 kips, and to failure near1000 kips.Test data showed that shaft behavior was essentially elastic during cyclic loading for loads of 400 kipsand lower (40% of ultimate capacity). The shafts experienced permanent, accumulating deformations duringrepeated loads of 600 and 800 kips.Modeling of the results showed the lateral load behavior could be effectively modeled in LPILE using the\ue2\u20ac\u153weak rock\ue2\u20ac? model included with LPILE software