Development of a Soil-Specific Liquefaction Assessment Framework: Role of Soil Gradation

土壤特定液化评估框架的开发：土壤级配的作用

• 批准号: RGPIN-2016-05622
• 负责人: Ghafghazi, Mohsen
• 金额: $ 1.68万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636242
• 关键词: Development; Soil; Specific; Liquefaction; Assessment

Assessment of liquefaction susceptibility and its consequences is a major part of geotechnical earthquake engineering. The practice relies on a case-history-based relation between in-situ penetration tests and cyclic response of soils. Apart from a poorly understood fines content correction, soils with different compositions and gradations and widely varied mechanical properties are essentially viewed as uniformly graded quartz sand. The existing methods would not have predicted liquefaction in almost any of the sites where liquefaction of widely graded gravelly soils resulted in widespread damage during the 2008 Wenchuan, China earthquake.

液化敏感性及其后果评估是岩土地震工程的重要组成部分。实践依赖于现场贯入试验和土壤循环响应之间的基于案例历史的关系。除了对细粒含量的修正知之甚少外，具有不同成分和级配以及各种机械性能的土壤基本上被视为均匀级配的石英砂。在2008年中国汶川地震中，现有的方法无法预测几乎所有广泛级配碎石土液化导致广泛破坏的场地的液化。