OALib Journal期刊
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水泥土融沉特性的试验研究
DOI: 10.3969/j.issn.1000-2006.2013.05.019, PP. 97-102
Keywords: 水泥土,水泥掺入比,融沉,压缩系数
Abstract:
为了研究水泥土融沉特性,对掺入不同比例水泥的南京地区典型黏土和砂土进行了融沉试验研究。结果表明:无论是黏土质还是砂土质水泥土,掺入比对融沉率的影响均与其对冻胀率的影响规律类似,融沉率随水泥含量增大而呈衰减性减小,并存在控制冻融的最佳水泥含量,南京地区典型黏土和砂土的最佳水泥掺入比分别为10%、5%,当采用最佳水泥掺入比时黏土和砂土的融沉率仅为不含水泥时的16?4%、18.5%;融化温度对最终融沉系数大小没有影响,但对最终融沉稳定时间有显著影响;黏土水泥土经过冻融后,其压缩系数增大31?1%~68?4%,而砂土经过冻融后,其压缩系数基本不变。综合分析可得:在土中掺入水泥可有效控制融沉,强制解冻不会增加融沉量但可大大加快融沉结束时间。
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