Seismic Displacement Evaluation Chart Method for Caisson Quay Walls Improved by the Vibro-Compaction Method
Bin Tong,
Vernon Schaefer,
Yingjun Liu
Issue:
Volume 3, Issue 2, June 2018
Pages:
11-25
Received:
4 August 2018
Accepted:
21 August 2018
Published:
21 December 2018
Abstract: Gravity type caisson walls are a type of popular but easily damaged waterfront construction structure, especially in seismic regions. Various forms of mitigation measures have been successfully and economically applied to improve their performances under the influence of soil liquefaction. Establishment of an effective, reliable, and easily-implemented liquefaction remedial design process based on a commonly used ground improvement technology is important for routine practice. To solve this problem, the vibro-compaction method, as one the most widely used accepted liquefaction remediation method, is applied as the countermeasure to improve a gravity type quay wall damaged by seismic-liquefaction in this study. More than three hundred cases of numerical analyses with variations of the improved zone configurations, improved soil properties and levels of seismic excitation loading were conducted. Based on the results of the parametric study, numerous correlations among various improved zone configurations, improved relative densities of the soils, excitation level, and improved performances of the caisson-wall structure are established. Therefore, a simple chart design procedure based on the established correlations is proposed to estimate the improved residual displacement of gravity caisson quay walls remediated by the vibro-compaction method. The results can be used as a convenient reference for liquefaction mitigation of gravity caisson wall using vibro-compaction method in routine practice.
Abstract: Gravity type caisson walls are a type of popular but easily damaged waterfront construction structure, especially in seismic regions. Various forms of mitigation measures have been successfully and economically applied to improve their performances under the influence of soil liquefaction. Establishment of an effective, reliable, and easily-impleme...
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