摘要
随着中国西部山区基础设施建设的迅猛发展,高填方地基日益增多,其长期工后沉降直接关系到上面机场、高速公路和铁路等设施的正常使用,成为困扰工程界的难题。该文分析了各国高填方长期现场监测数据。结果表明:蠕变沉降会在完工后相当长时间内会持续不断的发生,并和工后时间的对数大致成线形关系;而高填方遇水则有可能产生较大的湿陷沉降。室内试验是研究长期工后沉降的有效手段,而工后沉降的机理则和粗粒土的微观力学特性密切相关。因此,有必要对中国高填方工程开展长期监测及微观机理研究。
The booming infrastructure development in western China is leading to more and more high filled construction. The long-term settling of these high fills will influence the highways, railways, and airports built on top fills, but this settling is difficult to predict. This paper investigated a wide range of long-term field monitoring of high fills. The results show that creep settling, which will continue over a long period, is linearly related to the logarithm of the elapsed time. Large collapse settling can occur during wetting after construction. Laboratory testing showed that the settling is related to the micro-mechanisms of the coarse soils. So, it is necessary to carry out long-term monitoring on high fills in China and micro-mechanisms research.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第6期786-789,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家“八六三”高技术项目(2007AA11Z113)
教育部博士点基金新教师项目(200800031061)
关键词
高填方
长期工后沉降
蠕变
湿陷沉降
high fills
long-term settlement
creep
wet collapse compression
