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以水泥土处于复杂环境中的安全性和耐久性为研究背景,对酸碱环境下水泥土进行了固结不排水剪切试验,得到了水泥土应力偏差(σ1-σ3)与轴向应变(ε)关系曲线和抗剪强度指标,研究了酸碱度对水泥土抗剪强度的影响.试验结果表明,随着围压、水泥掺量、p H值的增加,水泥土的抗剪强度逐步增加;水泥土的黏聚力、内摩擦角随着水泥掺量及酸碱度p H值的增大而逐渐增加;得到了不同酸碱度环境下水泥土的抗剪强度方程.其研究结果对在水泥土工程中的安全性和耐久性设计具有一定的指导意义和参考价值.
Taking the safety and durability of cement-soil in complex environment as the research background, cement-soil undrained shear tests were carried out on cement-soil under acid-base conditions. The stress deviation (σ1-σ3) and axial strain ) Curve and shear strength index, the effect of pH value on the shear strength of cemented soil was studied.The results show that the shear strength of cemented soil increases gradually with the increase of confining pressure, cement content and p H value, The cohesion and internal friction angle of soil gradually increase with the increase of cement content and pH value of p H, and the shear strength equations of cement soil under different pH values are obtained. The results of this study are of great value in the safety of cement soil engineering Sexual and durability design has some guiding significance and reference value.