基于DDA方法的高填方分层碾压强夯研究
Research on High Fill Layered Milling and Ramming Based on DDA Method
罗余游 1刘洪伟 2朱鹏宇1
作者信息
- 1. 中铁二局第六工程有限公司,成都 610000
- 2. 中南大学,长沙 410000
- 折叠
摘要
针对基坑的高填方问题,提出不分层碾压和分4层碾压两种压实方案,基于DDA(Discontinuous Deformation Analysis)方法,从数值模拟的角度,比较两种方案在相同夯击次数后的压实度,评估是否可省略分层碾压过程.结果表明:两种压实方案经过相同夯击次数后,压实度存在显著差异,分层碾压可有效提升压实度,现场施工应进行分层碾压;随着夯击次数的增加,压实度呈现显著增长趋势,强夯处理所带来的压实度增幅大于分层碾压方式.
Abstract
For the high filling problem of foundation pit,two compaction schemes are proposed,namely,non-layer rolling and four-layer rolling.Based on the method of DDA(Discontinuous Deformation Analysis),the compaction degree of the two schemes is compared after the same number of ramming strokes from the point of view of numerical simulation,and the compaction degree of these two schemes is evaluated to determine whether the layering process can be omitted or not.The results show that:two compaction programs after the same number of tamping,there are significant differences in the degree of compaction,layered milling can effectively improve the degree of compaction,field construction should be layered milling;with the increase in the number of tamping,the degree of compaction shows a significant growth trend,strong tamping treatment of the degree of increase in the degree of compaction is greater than that of the layered milling method.
关键词
土石混合料/高填方/DDA/强夯/分层碾压/压实度Key words
soil and gravel mix/high fill/DDA/strong tamping/layered rolling/compaction引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据