Liquefaction Potential Index: Field Assessment
Liquefaction Potential Index: Field Assessment
复制标题
液化潜力指数：现场评估
DOI：
--
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Holzer
中科院分区：
文献类型：
--
作者：
S. Toprak;T. Holzer
在加州历史液化地点进行的锥贯入试验（CPT）测深用于评估液化潜力指数（LPI）的预测能力，LPI由Iwasaki等人于1978年定义。LPI将CPT测深推断出的可液化材料的深度、厚度和安全系数综合为一个参数。蒙特雷湾地区的LPI数据表明，当LPI等于或大于5和大于15时，地表液化表现的概率分别为58%和93%。LPI值通常也与液化的地面效应相关：从横向分布的测量值的中位数12下降到没有报告地面效应的测量值的中位数0。该指数特别有希望用于概率液化灾害制图，因为它可能是表征地质单元液化潜力的有用参数。
Cone penetration test (CPT) soundings at historic liquefaction sites in California were used to evaluate the predictive capability of the liquefaction potential index (LPI), which was defined by Iwasaki et al. in 1978. LPI combines depth, thickness, and factor of safety of liquefiable material inferred from a CPT sounding into a single parameter. LPI data from the Monterey Bay region indicate that the probability of surface manifestations of liquefaction is 58 and 93%, respectively, when LPI equals or exceeds 5 and 15. LPI values also generally correlate with surface effects of liquefaction: Decreasing from a median of 12 for soundings in lateral spreads to 0 for soundings where no surface effects were reported. The index is particularly promising for probabilistic liquefaction hazard mapping where it may be a useful parameter for characterizing the liquefaction potential of geologic units.