摘要
为了揭示碎石换填软土地基工作性状和力学机理,运用ABAQUS有限元法及其模拟技术,研究了城市道路碎石换填厚度和压实度对地基承载力和固结变形影响规律。分析结果表明:增加碎石换填厚度(开挖深度)与提高碎石垫层压实度可等效增加地基承载力或减小地表总沉降。研究结论建议:在承载力或沉降容许范围内,实体工程可采取提高碎石垫层压实度的措施减小碎石换填厚度(开挖深度),从而有效降低工程造价。
In order to get knowledge of the mechanism and performance of soft-soil improvement by means of gravel cushion replacement,the influences of compaction and depth of gravel cushion on the bea-ring capacity and consolidation deformation of the soft-soil ground in the municipal pavement are investigated by ABAQUS finite element techniques.It is shown that the bearing capacity increases or the total settlement decreases for the soft soil ground as the depth or compaction degree of gravel cushion is increasing,and increase of the depth of gravel cushion have the same improvement effect as increase of compaction degree of gravel cushion.It can be concluded that engineering expenses can be reasonably decreased by means of increase of compaction degree of gravel cushion so as to decrease gravel cushion depth under the tolerant bearing capacity and settlement.
出处
《公路》
北大核心
2011年第11期25-30,共6页
Highway
基金
常熟市科技计划项目资助
关键词
道路工程
软土地基
碎石垫层
有限元法
承载力
固结变形
road engineering
soft-soil ground
gravel cushion
finite element method
bearing capacity
consolidation deformation
