低掺量水泥土早期强度特性试验研究
|
摘要
通过不固结不排水三轴试验,研究了水泥掺入比小于5%的水泥土早期强度特征,探讨了素土与不同掺量水泥土的应力-应变关系,抗剪强度指标的变化规律,分析了土样的破坏形态。试验结果表明,水泥土强度随水泥掺量增加而增加,1%水泥掺量下土样与素土强度特性与破坏特性相似,2%水泥掺量一定程度上能增加土体强度,5%水泥掺量能够显著增加土体强度,起到良好的加固作用。研究结果对于深入认识低掺量水泥土的早期加固机理和现场施工合理选择水泥掺入比具有指导意义。
The early strength characteristics of cemented soil with cement mixing ratio less than 5% were studied by unconsolidated undrained triaxial test. The stress-strain relationship and shear strength index change rule of plain soil and different cement soil were discussed, and the failure mode of soil samples was analyzed. The test results showed that the strength of cement soil increased with the increase of cement content. The strength and failure characteristics of plain soil and soil sample with 1% cement content were similar;2% cement content increased the soil strength to some extent;5% cement content significantly increased the soil strength and provided good reinforcement. The research results have guiding significance for understanding the early reinforcement mechanism of low-volume cement soil and rational selection of cement incorporation ratio.
The early strength characteristics of cemented soil with cement mixing ratio less than 5% were studied by unconsolidated undrained triaxial test. The stress-strain relationship and shear strength index change rule of plain soil and different cement soil were discussed, and the failure mode of soil samples was analyzed. The test results showed that the strength of cement soil increased with the increase of cement content. The strength and failure characteristics of plain soil and soil sample with 1% cement content were similar;2% cement content increased the soil strength to some extent;5% cement content significantly increased the soil strength and provided good reinforcement. The research results have guiding significance for understanding the early reinforcement mechanism of low-volume cement soil and rational selection of cement incorporation ratio.
引文
[1]姜自超,齐召庆.纤维对磷酸镁水泥性能的影响试验研究[J].当代化工, 2017(02):215-218.
[2]刘晓明,付海雄,郭鸣琴.水泥土的力学性能综述[J].湖南工程学院学报(自然科学版), 2006,16(1):84-88.
[3]王海龙,申向东.水泥掺量对固化土早期结构形成的影响[J].硅酸盐通报, 2011,30(2):469-473.
[4]张天红,周易平,叶阳升,等.水泥土的强度及影响因素初探[J].中国铁道科学, 2003,24(6):53-56.
[5]贺建清,曾娟,孙希望.低掺量水泥土抗剪强度试验研究[J].矿冶工程, 2009,29(6):9-12.
[6]曾胜华,曾娟.低掺量水泥土强度特性试验研究[J].路基工程,2010(4):17-19.
[7]薛慧君,申向东,邹春霞,等.水泥土早期力学性能影响因素分析[J].硅酸盐通报, 2014,33(8):2056-2062.
[8]韩鹏举,张文博,刘新,等.氯化镁对水泥土早期强度的影响研究[J].岩土工程学报, 2014(6):1173-1178.
[9]田昌奇.掺入有机化合物改性剂对水泥的影响试验研究[J].当代化工, 2018(08):1578-1581.
[2]刘晓明,付海雄,郭鸣琴.水泥土的力学性能综述[J].湖南工程学院学报(自然科学版), 2006,16(1):84-88.
[3]王海龙,申向东.水泥掺量对固化土早期结构形成的影响[J].硅酸盐通报, 2011,30(2):469-473.
[4]张天红,周易平,叶阳升,等.水泥土的强度及影响因素初探[J].中国铁道科学, 2003,24(6):53-56.
[5]贺建清,曾娟,孙希望.低掺量水泥土抗剪强度试验研究[J].矿冶工程, 2009,29(6):9-12.
[6]曾胜华,曾娟.低掺量水泥土强度特性试验研究[J].路基工程,2010(4):17-19.
[7]薛慧君,申向东,邹春霞,等.水泥土早期力学性能影响因素分析[J].硅酸盐通报, 2014,33(8):2056-2062.
[8]韩鹏举,张文博,刘新,等.氯化镁对水泥土早期强度的影响研究[J].岩土工程学报, 2014(6):1173-1178.
[9]田昌奇.掺入有机化合物改性剂对水泥的影响试验研究[J].当代化工, 2018(08):1578-1581.