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黏土单层击实试验与制样因子研究
引用本文:汪攀峰,丁启朔.黏土单层击实试验与制样因子研究[J].岩土力学,2010,31(6):1797-1802.
作者姓名:汪攀峰  丁启朔
作者单位:南京农业大学,工学院,南京,210031
基金项目:国家自然科学基金,中国博士后科学基金 
摘    要:使用非标准击实仪进行单层击样,获取非标准击实状态下单层击实样的密度与击实功及含水率之间的关系,并进一步以得到的击实样获得其抗剪强度。发现当击实功小到一定程度时,击实密度随含水率的增大而不断增大,两者近似线性变化,无峰值出现。密度峰值对应的含水率与抗剪强度峰值对应的含水率有一个差值,其值在3.4%~5.7%之间。内摩擦角随含水率增大而减小的规律仅适合于一定的击实功。内摩擦角在较小的击实功下有峰值出现,但随着击实功的增大,内摩擦角的变化呈线性而非曲线形式。另外,针对土工室内模型试验的重塑土样制备问题,结合试验数据,给出了试验最优制样参数,并初步提供了评价指标?。

关 键 词:击实功  含水率  抗剪强度  重塑土样
收稿时间:2009-03-09

Study of dynamic compaction of monolayer cohesive soil and factors for remolded soil
WANG Pan-feng,DING Qi-shuo.Study of dynamic compaction of monolayer cohesive soil and factors for remolded soil[J].Rock and Soil Mechanics,2010,31(6):1797-1802.
Authors:WANG Pan-feng  DING Qi-shuo
Institution:College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Abstract:A nonstandard Proctor test was conducted on the monolayer cohesive soil to study the relationship among the density, compacting work the water content. Shear strengths of the compacted soil samples were further measured. It is shown that under lower compacting work, the compacting density increased with the increase of the water content; following a linear trend and no peak density being found in the tested range of moisture content. The moisture content for the density peak and that for the shear strength peak were separated by a gap, of which magnitude is in the range of 3.4% to 5.7% in this experiment. The rule of the reduced internal friction angle with the increased moisture content was also found to be valid for certain impacting work. Peak value appeared in the curve of the internal friction angle for lower compacting work; but the curve was replaced by linear trend when the compacting work was increased. Another focus of the experiment was on the problems of remolded soil for indoor model test. Based on the experimental data, the optimum parameters for preparing remolded soil was proposed; and an evaluating index ? was given tentatively.
Keywords:compaction work  moisture content  shear strength  remolded soil
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