重塑黄土成样均匀性研究  

Sample-preparing Uniformity of Remolded Loess

作　　者：周伟红[1] 崔自治[1] 

机构地区：[1]宁夏大学土木与水利工程学院,银川750021

出　　处：《科学技术与工程》2015年第2期266-269,共4页Science Technology and Engineering

基　　金：教育部"长江学者和创新团队发展计划"创新团队项目(IRT1067)资助

摘　　要：为了改善重塑黄土成样的均匀性,提高成样效率和试验结果的可靠性,以宁夏同心下马关黄土为研究对象,成样方法、成样分层数和土样密度为因素,试验与统计分析相结合,研究了重塑黄土成样的均匀性。研究结果表明:成样均匀性随着成样分层数的增加而增加;同一成样分层,土样密度自上而下逐渐减小,在成样分层数较少时,顶部和底部的密度差异较大;成样均匀性与土样的密度有关,但密度的影响程度随成样分层数增大而减小;在成样分层数相同时,压样法较击样法的成样均匀性好,效率高;在成样分层数为5时,压样法可以获得很好的成样均匀性。In order to improve the sample-preparing uniformity, efficiency and the results reliability of remolded soil, taking loess in Ningxia Tongxin Xiamaguan as research object, sample-preparing methods, number of layer and soil sample density as factors, the sample-preparing uniformity of remolded loess was studied by combining tes- ting and statistical analysis. The result shows that： the sample-preparing uniformity increase with the increasing of the sample-preparing layers. Soil sample density gradually decreases from top to bottom in the same sample-prepar- ing layer, the density of soil sample in top and bottom has a greater difference when less number of the sample-pre- paring layer. The sample-preparing uniformity is related to the density of soil samples, but the influence degree of density decreases with the number of sample-preparing layer increase. When the number of sample-preparing layer is the same, pressing method than bumping method the uniformity of soil sample is better, the efficiency is higher. The pressing method can obtain a good sample-preparing uniformity when the layer number is 5.

关 键 词：成样方法 重塑黄土 均匀性 

分 类 号：TU43[建筑科学—岩土工程] O344[建筑科学—土工工程]