Influence of source-to-site distance and diagenesis on liquefaction triggering of 200,000-year-old beach sand.
In: Engineering Geology, Jg. 298 (2022-03-05), S. N.PAG
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Zugriff:
Liquefaction triggering of the outcropping 200,000-year-old Ten Mile Hill beds sand facies (Qts) near Charleston, South Carolina is characterized in this paper. The characterization includes evaluating the relative susceptibility to liquefaction of Qts assuming a uniform seismic load and using seismic cone penetration testing at 46 sites, the ratio of measured small-strain shear wave velocity to estimated small-strain shear wave velocity (MEVR), and the liquefaction potential index (LPI). The computed LPI values indicate a slight decrease in the liquefaction susceptibility of Qts moving away (5 to 30 km) from the likely source of the 1886 Charleston earthquake (M w ~ 7). Also characterized is the liquefaction potential of Qts during the Charleston earthquake and a range of other earthquake loadings. The results for the range of other earthquake loadings are summarized in terms of liquefaction probability curves, which provide a method for mapping liquefaction potential in Qts. A back-calculated, lower-bound diagenesis correction factor of 1.11 for areas of Qts where liquefaction surface manifestations were not observed agrees well with the published data. • No consistent trends with distance to fault in the liquefaction susceptibility evaluation of Qts. • Liquefaction probability curves for Qts are developed in this study. • Liquefaction potential is over-predicted without a diagenesis correction factor. • A lower-bound average diagenesis correction factor for Qts is 1.11. [ABSTRACT FROM AUTHOR]
Titel: |
Influence of source-to-site distance and diagenesis on liquefaction triggering of 200,000-year-old beach sand.
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Autor/in / Beteiligte Person: | Bwambale, Barnabas ; Andrus, Ronald D. ; Heidari, Tahereh ; Gathro, Joshua ; Cramer, Chris H. |
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Zeitschrift: | Engineering Geology, Jg. 298 (2022-03-05), S. N.PAG |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 0013-7952 (print) |
DOI: | 10.1016/j.enggeo.2022.106557 |
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