Evaluation of dynamic cone penetration test for liquefaction assessment of gravels from case histories in Italy
Evaluation of dynamic cone penetration test for liquefaction assessment of gravels from case histories in Italy
复制标题
DOI：
--
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
K. Rollins;S. Amoroso
中科院分区：
文献类型：
--
作者：
K. Rollins;S. Amoroso
在北美的实践中，贝克尔贯入试验（BPT）已成为用于评估砾石土抗液化性的主要现场试验。然而，该测试是昂贵的，并且关于相关性和校正存在不确定性。作为一种替代方案，74 mm直径的动态静力触探（DPT）在中国开发的最近与抗液化强度的基础上，从Mw7.9汶川地震的现场性能数据。在这项研究中，抗液化性进行了评估，使用DPT探测与两个锤击能量在两个地点在Avasinis，意大利砾石土液化在1976年弗留利，意大利地震。根据4.75 mm标准，砾石含量范围为20 - 40%，DPT液化相关性在观察到液化特征的所有情况下均正确预测了液化。这些结果表明，DPT可以提供准确的液化危险性评价砾石土更经济的替代程序。标准SPT能量校正被认为是合理的DPT。
: In North American practice, the Becker Penetration Test (BPT) has become the primary field test used to evaluate liquefaction resistance of gravelly soils. However, this test is expensive and uncertainties exist regarding correlations and corrections. As an alternative, the 74 mm diameter dynamic cone penetration test (DPT) developed in China has recently been correlated with liquefaction resistance based on field performance data from the Mw7.9 Wenchuan earthquake. In this study, liquefaction resistance was evaluated using DPT soundings with two hammer energies at two sites in Avasinis, Italy where gravelly soil liquefied in the 1976 Friuli, Italy earthquake. Gravel content ranged from 20 to 40% based on the 4.75mm criteria and The DPT liquefaction correlation correctly predicted liquefaction in all cases where liquefaction features were observed. These results indicate that the DPT can provide accurate liquefaction hazard evaluations for gravelly soils more economically than alternative procedures. Standard SPT energy corrections were found to be reasonable for the DPT.