Geotechnical characterization and liquefaction evaluation of gravelly reclamations and hydraulic fills (Port of Wellington, New Zealand)
Geotechnical characterization and liquefaction evaluation of gravelly reclamations and hydraulic fills (Port of Wellington, New Zealand)
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砾石填海和水力填充的岩土工程特征和液化评估（新西兰惠灵顿港）
DOI：
10.1016/j.sandf.2020.10.001
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发表时间：
2020
影响因子：
3.7
通讯作者：
J. Bray
中科院分区：
文献类型：
--
作者：
Riwaj Dhakal;M. Cubrinovski;J. Bray
在2016年Mw7.8 Kaikōura地震中，惠灵顿（新西兰）CentrePort的填海区发生了广泛的液化，而2013年的两次地震中，强度较小的震动只在港口的孤立区域产生了一些液化现象。两种类型的填海，包括端部倾倒砾石填料和水力放置粉砂填料，没有很好地代表在目前的经验简化液化程序。全面的CPT调查，并用于表征填充物，然后对2013年和2016年影响港口的三次地震进行基于CPT的液化评估。将分析结果与液化性能的观测结果进行比较，并根据填土的土壤和存款特性进行检查。基于CPT的液化评估与观察结果基本一致，但这些程序的明显缺陷和局限性也很明显。本文详细审查了传统的工程液化评估程序时，适用于非传统的或有问题的土壤进行此类评估，参考了有据可查的案例历史。
In the 2016Mw7.8 Kaikōura earthquake, widespread liquefaction occurred in the reclamations at CentrePort, Wellington (New Zealand), while less intense shaking during two earthquakes in 2013 produced only some liquefaction manifestation over isolated areas of the port. The two types of reclamations, comprised of end-dumped gravelly fills and hydraulically placed silty-sandy fills, are not well represented in current empirical simplified liquefaction procedures. Comprehensive CPT investigations are presented and used to characterize the fills, and then perform CPT-based liquefaction evaluation for the three earthquakes that affected the port in 2013 and 2016. The results of the analyses are compared to observations of liquefaction performance and are examined in relation to the soil and deposit characteristics of the fills. The CPT-based liquefaction assessment was generally consistent with observations, though clear shortcomings and limitations of these procedures were also evident. The paper scrutinizes conventional engineering procedures for liquefaction assessment when applied to non-conventional or problematic soils for such assessment, with reference to a well-documented case history.