摘要
利用研制的微型十字板剪切仪对重塑后静置一定时间的太湖与白马湖两种疏浚淤泥进行了强度测试,对两种疏浚淤泥的触变特性进行了研究与比较。研究结果表明,两种疏浚淤泥重塑后最初始时间内触变强度的增长最快,随时间增长触变强度的增长变慢,448d时触变强度随时间的增长趋于稳定。含水率为液限时白马湖疏浚淤泥的触变强度高于太湖疏浚淤泥。触变强度比率与触变强度的变化趋势类似。含水率越小疏浚淤泥触变性越大。含水率为液限时两种疏浚淤泥的触变强度比率与London和Detroit淤泥接近,小于Beauharnois和Shellhave淤泥,大于Horten淤泥。448d时除Beauharnois淤泥外,其他淤泥的触变强度比率均保持相对稳定。根据定义两种疏浚淤泥均为低灵敏性黏土。
The shear strength of Taihu lake and Baimahu lake dredged slurries are tested with miniature shear vane apparatus at different stewing times after remolded. The thixotropy of two kinds of dredged slurries is studied. Test result shows that a sharp thixotropic strength increase at the first time after remolded is recorded. Then the thixotropic strength still increases,but at a slower rate. The increase of the thixotropic strength at 448 d tends to be stable. The thixotropic strength of Taihu lake dredged slurries is higher than that of Baimahu lake at the liquid limit.The variation trend of thixotropic strength ratio is similar with the thixotropic strength. The thixotropy of dredged slurries increases with decreasing water content. The thixotropic strength ratio of the two kinds of dredged slurries at the liquid limit is close to that of the London and Detroit dredged slurries. It is less than that of Beauharnois and Shellhave dredged slurries. It is greater than that of Horten dredged slurries. The thixotropic strength ratio of theothers besides the Beauharnois dredged slurries keeps stable at 448 d. The two kinds of dredged slurries are low sensitivity clays according to the definition of the clays sensitivity.
出处
《工程地质学报》
CSCD
北大核心
2015年第3期548-553,共6页
Journal of Engineering Geology
基金
长江科学院开放研究基金(CKWV2014210/KY)
国家自然科学基金(51278172)
海洋公益专项重大项目(201105024)资助
关键词
淤泥
微型十字板剪切仪
触变性
触变强度
触变强度比率
Dredged slurries,Miniature shear vane apparatus,Thixotropy,Thixotropic strength,Thixotropic strength ratio
