摘要
湿陷性黄土地区中静压桩的挤土效应尚不明确。利用应力路径三轴仪进行应变保持试验,模拟沉桩及随后的桩周土体的应力状态和物理性质的改变,特别是浸水后的挤土效应的变化。试验结果表明:沉桩后挤土应力不断衰减,浸水造成进一步衰减,最后的稳定值与围压相关;桩周土体在挤土应力作用下不断固结,直至稳定,浸水后体变有显著增大。
The compaction effect of jacked-in piles in loess is still not clear. A series of tri-axial strain-holding tests were conducted under the condition of water immersion,which could simulate sinking piles and the stress state of the soil around the piles,as well as the change in physical property,particularly the change in the compaction effect after water immersion. The results of tests showed that after sinking pile the compaction stress decayed with time,water immersion caused further stress attenuation and the last stable value was related to the confining pressure; moreover,the soil consolidated continuously due to the compaction stress,till its stability and volume change significantly increased around the pile soil after water immersion.
出处
《工业建筑》
CSCD
北大核心
2016年第3期78-82,共5页
Industrial Construction
基金
河南省高校科技创新团队支持计划(14IRTSTHN029)
河南省教育厅自然科学研究计划项目(2010A560013
2011B560012)
河南省科技攻关计划项目(142102210644)
关键词
黄土
静压桩
挤土效应
loess
jacked-in piles
compaction effect
