摘要
采用数值分析的方法,研究土料在现场压实条件下压实度随深度的变化规律,计算土层平均压实度,点位检测评价土层平均压实度的位置、土料现场压实度保证系数.通过对现场压实特性的研究,发现土层现场压实随深度变化符合二次抛物线规律,不同土料不同铺土厚度代表土层平均压实度的检测位置不同,有关规范规定的检测位置压实度与土层平均压实度有着较大差距,不能代表土层平均压实度,造成压实度评价出现较大偏差,对工程质量、安全、效益产生很大不利影响,同时不能为土体应力和压缩模量的计算及土体应力应变分析等其他科学研究提供准确计算基础数据.
A numerical analysis method has been developed to study the variation of rockfill material site compaction with depth,to determine the average compacted density of placed layers,and to calculate guaranteed coefficient of rockfill material compacted on site. It follows from the studies of site compaction characteristics that the variation of tested placement layers with depth conforms to the law of quadratic parabola. Various placed materials at different depths have respectively their own locations of averaged compacted density and those locations of average compaction degree stipulated in the specifications vary considerably from the practical situations. This influences significantly on soil construction quality, safety an efficiency. As a result,the calculation of soil mass stresses and compressibility modulus as well as the stress,strain analysis would not be carried out to a good accuracy.
出处
《水利水电技术》
CSCD
北大核心
2004年第5期117-121,共5页
Water Resources and Hydropower Engineering
基金
国家自然科学基金资助项目(40172092).
关键词
土料现场压实度
数值模拟
压实特性
试验研究
site compaction of rockfill material
mathematical simulation
compaction characteristics
expermental study
