海南大学学报（自然科学版中英文）2026，Vol.44Issue(1)：87-97,11.DOI:10.65658/j.hndk.2025011304
海岛有机质浸染砂液化特性振动台试验研究
Shaking-table tests on the liquefaction characteristics of organic matter-disseminated sand in island areas
摘要
Abstract
Sand soli liquefaction can significantly reduce the bearing capacity of foundations,posing risks to the structural integrity of buildings and infrastructure.In this study,free-field shaking table tests were conducted to evaluate the liquefaction behavior of regional sandy soils from island environments under various sand types and acceleration conditions.The liquefaction characteristics of the sandy soil were analyzed by integrating macroscopic phenomena,pore pressure measurements,and acceleration data obtained from the tests.The results indicate that under seismic excitation,both types of sandy soil foundations experience deformation and settlement while exhibiting liquefaction phenomena such as flow failure,sand spouting,and water gushing.The ratio of excess pore pressure is positively correlated with peak loading values,while liquefaction susceptibility decreases with greater burial depth.Notably,organic matter-disseminated sand demonstrates slower excess pore pressure dissipation and persistent residual pressures,whereas standard sand exhibits rapid and complete dissipation.Acceleration measurements reveal a bottom-to-top amplification effect within soil layers.The amplification coefficient for acceleration increases alongside higher peak loading values,demonstrating a more pronounced amplification effect in shallower soil layers.Additionally,the cyclic stress ratio(CSR)rises with increased loading intensity,and organic matter-disseminated sand presents a heightened risk of liquefaction under identical conditions.Significance analysis underscores that peak ground acceleration magnitude exerts a greater influence on liquefaction potential than burial depth.关键词
振动台试验/有机质浸染砂/砂土液化Key words
shaking-table test/organic matter-disseminated sand/liquefaction of sandy soil分类
建筑与水利引用本文复制引用
莫朝栋,杜娟,雷枭鹏,张一航..海岛有机质浸染砂液化特性振动台试验研究[J].海南大学学报（自然科学版中英文）,2026,44(1):87-97,11.基金项目
本文得到以下基金项目支持:国家自然科学基金项目(52268056) （52268056）
海南省重点研发项目(ZDYF2022SHFZ277). This article was supported by the following funding projects:National Natural Science Foundation of China(52268056) （ZDYF2022SHFZ277）
Hainan Province Science and Technology Special Fund(ZDYF2022SHFZ277). （ZDYF2022SHFZ277）
