Settlement and Capacity of Piles Under Large Number of Cyclic Loads

Renpeng Chen, Chunyin Peng, Jianfu Wang, Hanlin Wang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This study reports a group of field tests on cyclically loaded piles installed in soft clay in Huzhou, China. Two 29.5 m long pipe piles were instrumented with transducers to measure the accumulated settlement at the pile-head, the pore water pressure and total pressure at the pile-soil interface, and axial load at the pile end, respectively. The major objective of the field testing is to gain a better understanding of the evolution of the pile-head settlement and the effective stress at the pile-soil interface. The results of cyclic loading tests under different combinations of static load and cyclic load are discussed with reference to changes in the pile capacity, the permanent settlement, and the radial stresses. It is found that the permanent settlement of piles can be characterized as quickly stabilized (QS), progressively developing (PD), and dramatically failed (DF) patterns. Under low-level loading (QS pattern), the pile-shaft earth pressure is nearly undisturbed, final gains in effective stress are observed due to slight dissipation of pore pressure. For intermediate-level loading (PD pattern), significant reductions in pore pressure, earth pressure, and effective stress are observed after cyclic loading. Regarding high-level loading (DF pattern), the quick accumulation of pore water pressure leads to a slight increase in earth pressure, resulting in a continuous decrease in effective stress.

Original languageEnglish
Title of host publicationAdvances in Transportation Geotechnics IV - Proceedings of the 4th International Conference on Transportation Geotechnics Volume 3
EditorsErol Tutumluer, Soheil Nazarian, Imad Al-Qadi, Issam I. A. Qamhia
PublisherSpringer Science and Business Media Deutschland GmbH
Pages1049-1059
Number of pages11
ISBN (Print)9783030772376
DOIs
Publication statusPublished - 2022
Event4th International Conference on Transportation Geotechnics, ICTG 2021 - Chicago, United States
Duration: 23 May 202126 May 2021

Publication series

NameLecture Notes in Civil Engineering
Volume166
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference4th International Conference on Transportation Geotechnics, ICTG 2021
Country/TerritoryUnited States
CityChicago
Period23/05/2126/05/21

Keywords

  • Cyclic loading
  • Field testing
  • Long-term behaviors
  • Soft clay

ASJC Scopus subject areas

  • Civil and Structural Engineering

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