Experimental study of near-shore pile-to-pile interaction |
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| Institution: | 1. Department of Economics and Technology, University of San Marino, Via Salita alla Rocca, 47890, San Marino;2. Department of Civil and Building Engineering and Architecture, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy;1. Turkish Air Force Academy, Aeronautics and Space Technologies Institute, 34149, Ye?ilyurt, ?stanbul, Turkey;2. Turkish Air Force Academy, Aerospace Engineering Department, 34149, Ye?ilyurt, ?stanbul, Turkey;1. Idaho National Laboratory, 2525 Fremont Avenue, Idaho Falls, ID 83402, USA;2. University at Buffalo, The State University of New York, North Campus, 212 Ketter Hall, Amherst, NY 14260, USA;1. PhD Student, Academy of Scientific and Innovative Research (AcSIR), New Delhi-110001, India;2. Scientist, Geotechnical Engineering Group, CSIR-Central Building Research Institute, Roorkee-247667, India;3. Professor, Department of Civil Engineering, Indian Institute of Technology, Powai, Mumbai - 400076, India;4. Adjunct Professor, Academy of Scientific and Innovative Research (AcSIR), New Delhi 110001, India;5. Professor, Department of Civil Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India;6. Adjunct Professor, Academy of Scientific and Innovative Research (AcSIR), New Delhi 110001, India and former Director, CSIR-CBRI Roorkee 247667, India |
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| Abstract: | This paper presents the results of lateral impact load field tests carried out on a system of three steel pipe piles vibro-driven into soft clay in a near-shore marine environment, with the aim of evaluating the pile–soil–pile dynamic interaction. Piles are arranged in an “L” shaped horizontal layout and are instrumented with accelerometers at their free heads. The obtained results show the complex dynamic behaviour at very small strain of the vibrating soil–water–piles system. The role of different type of waves in the pile to pile interaction is investigated by analyzing the results in the time and frequency domains and by means of a time–frequency analysis. The effects of the pile spacing and input direction on these interaction mechanisms are also presented. Finally, important dynamic parameters of the soil, such as the velocities of the shear waves and surface waves (Scholte waves) of the upper soil are directly estimated from the time delays between signals recorded at the pile heads. |
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