玄武岩残积土的电阻率与直剪强度关系

Relationship between electrical resistivity and direct shear strength of basalt residual soil

西南地区的玄武岩残积土具有结构性强、孔隙比大、塑性指数高等不良工程特征,其原位地基承载力较高,但遇水后强度降幅较大。依托在建的贵州省毕节—威宁高速公路工程,运用现场原位测试、室内试验和理论分析等手段,测试了玄武岩残积土的电阻率和工程特性指标,讨论了以玄武岩残积土电学特性评价其工程特性的可行性,最后通过对比现场高密度电阻率法的实测结果,证实了以玄武岩残积土的电阻率评价其工程特性是可行的。

Residual soil of basalt in southwest of China has the characteristics of strong constitutive, large void ratio and high plasticity index. The bearing capacity is high but decreases significantly in water. Based on the construction of Bijie-Weining highway in Guizhou Province, by means of in-situ tests, laboratory tests and theoretical analysis, the electrical resistivity and engineering characteristics of residual soil are tested, and the possibility of evaluation of the engineering properties by electrical characteristics is discussed. Through the high-density resistivity survey results, it is proved feasible to evaluate the engineering properties with the electrical resistivity.