摘要
为探讨碎石含量及其分布对强夯地基承载力和差异沉降的影响规律,采用平板荷载试验,对3种不同碎石含量强夯地基的加固效果进行了检测.结果表明:碎石土强夯地基具有较好的承载力,平均承载力均超过250 kPa;随碎石含量增加和分布不均匀性增强,地基承载力的不均匀性增强,差异沉降增大;对于碎石含量较高且分布不均的强夯地基,当荷载接近或达到地基承载力以后,将出现更大的差异沉降;对于重庆市开县某强夯地基,不同碎石含量可导致强夯地基的差异沉降量相差3～4倍.
In order to deeply probe into influences of gravel content and distribution on bearing capacity and differential settlement, 18 plate loading tests were carried out on 3 dynamic compaction foundations with different gravel contents. The research result shows that the dynamic compaction foundation of gravel soil has a better bearing capacity with a mean of above 250 kPa. The non-uniform bearing capacity and differential settlement of foundation are more obvious with the increase of gravel content and uneven distribution. For dynamic compaction foundation with a high gravel content and uneven distribution, great differential settlement occurs when load is close to or reaches at its bearing capacity. The differential settlement can be as large as 3 to 4 times because of the difference of grave content of a dynamic compaction foundation in Kai County in Chongqing.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2013年第3期435-440,454,共7页
Journal of Southwest Jiaotong University
基金
教育部创新团队发展计划资助项目(IRT1045)
中央高校基本科研业务费重点项目(CDJZR12 20 55 01)
中国博士后科学基金特别资助项目(201003315)
关键词
强夯地基
碎石土
不均匀性
载荷试验
差异沉降
dynamic compaction foundation
gravel soil
non-uniformity
load test
differentialsettlement
