探索不同状态参数下饱和砂和含气砂的抗液化性

IF 4.9 2区 工程技术 Q1 ENGINEERING, CIVIL Transportation Geotechnics Pub Date : 2024-11-01 DOI:10.1016/j.trgeo.2024.101410
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引用次数: 0

摘要

地震诱发的液化是一种相关的自然灾害,对全球众多建筑物、设施和基础设施造成了破坏。这种现象对基础设施造成的破坏是由于颗粒土失去刚度和强度,导致沉降和横向扩展。地震引起的液化通常发生在由非塑性土壤组成的饱和沉积层中。因此,降低饱和度被认为是减轻液化抗性最有利、最乐观的方法之一。本文通过改变饱和度和状态参数,探讨了饱和砂土和含气砂土的地震诱发液化问题。结合相对密度(或初始空隙率)和约束压力的影响,使用状态参数分析力学行为。结果表明,随着状态参数的增加,饱和度的降低所引起的抗液化能力的提高也越大。这种改善可以通过综合饱和度和状态参数对液化阻力影响的多元模型来描述和量化。这为提高易受地震诱发液化影响的基础设施的抗灾能力提供了一个潜在的解决方案。
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Exploring liquefaction resistance in saturated and gassy sands at different state parameters
Earthquake-induced liquefaction is a relevant natural hazard due to the damages caused in numerous buildings, facilities and infrastructures worldwide. The damages caused to the infrastructure by this phenomenon are caused by the loss of stiffness and strength in granular soils, which leads to settlements and lateral spreading. Earthquake-induced liquefaction typically occurs in saturated deposits composed of non-plastic soils. Hence, the degree of saturation reduction is considered one of the most favourable and optimistic methods for liquefaction resistance mitigation. This paper explores the earthquake-induced liquefaction in saturated and gassy sands, varying their degree of saturation and state parameters. The state parameter was used to analyse the mechanical behaviour by combining the effects of relative density (or initial void ratio) with confinement pressure. Results show that liquefaction resistance improvement caused by the reduction in the degree of saturation is higher as the state parameter increases. This improvement can be described and quantified by multivariate models integrating the effects of degree of saturation and state parameter on liquefaction resistance. This provides a potential solution for improving the resilience of infrastructures susceptible to earthquake-induced liquefaction.
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来源期刊
Transportation Geotechnics
Transportation Geotechnics Social Sciences-Transportation
CiteScore
8.10
自引率
11.30%
发文量
194
审稿时长
51 days
期刊介绍: Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.
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