Lateral Load Behavior Of A Single Pile In Liquefaction Sands

The study on the lateral bearing capacity of the pile foundation in liquefying sandunder seismic loading becomes a research hotspot in geotechnical engineering in thesedecades. There are some simplified design methods for predicting the lateral bearingcapacity of the pile in liquefied ground under seismic loading, but these methods have notbeen verified by physical data during the real earthquake or the model test. So the lateralbearing capacity of the pile in liquefied ground was investigated through the shakeingtable test in this dissertation. Some main researches can be concluded as the following:Shaking table model tests on the pile and the liquefied ground interaction wereimplemented to study the mechanism of the decline of the lateral bearing capacity of thepile in liquefiable ground under external loading. And the paper clarify the decline courseof lateral bearing capacity of the pile in liquefied ground under seismic loading, and makethe conclusion which the decline of lateral bearing capacity relies on the sand density.We calculate and simulate the change of the moments of the pile in liquefied groundduring the shaking table test based on the "Beam on Nonlinear Winkler Foundation(BNWF)" model, and has compared the result of calculation with the result of the test.The relationship between the strength of liquefied sand and the p-y curves ofliquefied sand was explored. And the tests on the structural residual strength of liquefiedsand were proposed, so the structural residual strength index of liquefied sand was got.Using the index and the method recommended by API for p-y curves, the p-y curves ofliquefied sand were got. So a method using the structural residual strength to develop thep-y curve of the liquefied sand is proposed.