黄土状水泥土抗剪强度特性研究

Research on mechanical properties of cement loess

为了探索水泥土加固技术对黄土地区的适宜性及可靠性,通过室内试验,对西北地区黄土中添加一定量水泥使其形成黄土状水泥土,研究黄土状水泥土含水量、掺入比、龄期等因素对其力学特性的影响.研究表明,黄土中掺入水泥搅拌后,土的性质得到改善,降低了土的含水量,提高了土的密实度及土的强度;同时,表明黄土状水泥土的水泥掺入比较大时,水泥土的强度随初始含水量增大而增大,但水泥掺入比较小时,只有在某一最优含水量下黄土状水泥土的强度可达到最大值.

Based on the tests in laboratory, the paper studied that the influence of both water content and ratio of cement admixed as well as age to mechanical properties of cement-loess by adding some cement to loess in northwest region. It showed that： when some cement was added to loess, loessic soil properties were improved, water content decreased and both compactness and shear strength of soil increased. At the same time, when the ratio of cement admixed to loess was comparatively large, the intensity of cement soil increased with the increase of water content, and when that was comparatively small, the shear strength of cement soil reached maximum.