黄土抗侵蚀能力与抗剪强度关系研究

基于野外测试试验及室内土工试验成果,对黄土抗侵蚀能力与抗剪强度之间的关系进行了系统研究。试验结果显示：低压条件下饱和原状土的粘聚力在大于2 kPa时与黄土抗冲系数Kc有强烈的正相关关系,小于2 kPa时,Kc严接近于0;天然原状土、饱和扰动土的粘聚力与Kc没有明显的相关性。试验黄土的内摩擦角变化不大,对Kc没有直接的影响。这说明低压条件下饱和原状土的粘聚力是影响黄土土壤抗侵蚀能力内在因素。

Study on correlation between erosion resistance and shear strength of loess

Based on the relevant field experiment and geotechnical test in laboratory, the correlation between erosion resistance and shear strength of loess is studied herein. The study result shows that the cohesion of saturated undisturbed soil under the low pressure shows a strong positive correlation with the anti-scour coefficients of loess, when it is larger than 2 kPa and when it is less than 2 kPa, Kc is near 0. Moreover, the cohesions of both the undisturbed soil and the saturated disturbed soil have no obvious correlativity with Kc.Furthermore, there is less change of the internal friction angle of the tested loess and then no direct impact on Kc.It is concluded that the cohesion of saturated undisturbed soil under the low pressure is just the internal factor of the impact on the soil erosion-resistance of loess.