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Behaviour of Cyclic Laterally Loaded Pile Group in Soft Clay

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Abstract

The capacity of laterally loaded piles is mainly governed by the strength of soil at the proximity of top level of the piles. In coastal areas, the topsoil mostly comprises of soft clay and they extend for a considerable depth, offering low resistance against lateral loads. In addition to static loads, the piles are subjected to cyclic loads. Experimental study of single pile and pile group for varying L/D ratios, number of piles in a group and spacing between the piles under static and cyclic lateral load is studied. Cyclic lateral load tests were conducted for L/D ratios of 12, 18 and 24 under cyclic load ratio of 0.6. Cyclic load tests were performed by embedding the piles in a clay bed of consistency 0.2. The experimental results showed that for pile of L/D ratios the 12, 18 and 24 displacement at pile head becomes nearly constant after 300 hundred cycles. From the pattern of displacement versus number of cycles, it is observed that shorter piles exhibit higher magnitudes of displacement compared to longer piles upon cyclic loading. However, longer piles show higher rate of increase in displacement with number of cycles compared to shorter piles.

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Authors and Affiliations

  1. Department of Civil Engineering, SSN College of Engineering, Chennai, 603110, India

    S. V. Sivapriya

  2. Division of Soil Mechanics and Foundation Engineering, College of Engineering-Guindy, Guindy, 600025, India

    M. Muttharam

Authors
  1. S. V. Sivapriya
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  2. M. Muttharam
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Correspondence to S. V. Sivapriya.

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Sivapriya, S.V., Muttharam, M. Behaviour of Cyclic Laterally Loaded Pile Group in Soft Clay. Indian Geotech J 49, 283–291 (2019). https://doi.org/10.1007/s40098-018-0328-0

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  • DOI: https://doi.org/10.1007/s40098-018-0328-0

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