贵州红棕色玄武岩风化土强度试验研究

在滇黔地区公路建设中,沿线边坡表层经常广泛分布着红棕色玄武岩风化土,厚度较大,风化程度较高,降雨作用对边坡的稳定影响较大。土质边坡的稳定性在很大程度上取决于土的抗剪强度指标,但目前对玄武岩风化土的强度缺乏系统深入的研究,给该地区工程建设带来了挑战。通过现场原位推剪试验和一系列室内土工试验,得出了该红棕色玄武岩风化土的抗剪强度指标变化规律、含水量对土体强度的影响、峰值强度和残余强度之间的差异,为边坡稳定性分析提供了必要的参考依据。

Testing study on strength of red-brown soil of weathered basalt soil in Guizhou

There are red-brown soils of weathered basalt distributed widely in the slope of highway construction in Yunnan-Guizhou area, thickly and having a great impact on the slope in the rain, the shear strength of soil has great relation on the slope stability. However, lack of deeply research in its strength of red-brown soil, which brings the great challenge to the local engineering construction. Through push-shear in-situ test and a series of indoor soil tests, it has gained the variation of parameters of shear strength, the effect of water content on the parameters of shear strength of soil in slide zone and the difference between the peak strength and residual strength of red-brown soil of weathered basalt soil, this supplies materials to slope stability analysis.