通过对水泥土进行无侧限强度试验,并同步测量其电阻率,分析了水泥土在受压变形过程中电阻率变化规律。研究表明,水泥土电阻率随龄期和无侧限抗压强度的增大而增大,随着应变的增加而逐渐降低;当应变增加到一定程度时,电阻率趋于稳定,此时水泥土的应力达到最大值,并发生破坏;水泥土电阻率和应变的关系能够很好地反映在受压变形过程中水泥土损伤的4个阶段,水泥土损伤越大,裂纹越多且相互连通程度越大,孔隙水贯通性越强,结构的整体导电性就越高,水泥土的电阻率越低。为建立水泥土的电阻率损伤模型奠定了基础。
The unconfined compression strength tests were performed on the cemented soil samples, and at the same time their electrical resistivities were measured. The electrical resistivity of cemented soil increased with the increment of age and unconfined compression strength, whereas decreased with the increment of strain. At maximum stress, the electrical resistivity of cemented soil became stable and the samples were cracked. The relationship of ρ-ε was found to be effective in quantitative studies on the damage variation of cemented soil. With more damages, cemented soil had more crazes, and more interconnections between crazes and between pore water, so the conductivity of cemented soil became higher, correspondingly, the electrical resistivity became lower.