崩岗区残积土抗剪强度试验研究

以江西省赣州市崩岗侵蚀区的土样为试验样本,通过对不同含水率、干密度、石灰含量、养护时间、干湿效应影响下的崩岗区残积土进行直剪试验,研究崩岗区土的抗剪强度特性,并分析崩岗侵蚀的机理。结果表明,含水率增加、干密度降低及干湿循环次数增加均会使土样的抗剪强度降低;掺入石灰能提高土样的抗剪强度,且石灰含量和土样的养护时间与土样的抗剪强度成正相关。

Experimental Study on Shear Strength of Soil in Collapse Area

Taking the soil samples from the collapse area of Ganzhou City, Jiangxi Province as experimental samples, the direct shear test of the residual soil in the area affected by the different moisture content, dry density, lime content, curing time, wetting and drying effect was conducted to study the shear strength characteristics of the soil in the collapse area and to analyze the mechanism of the collapse erosion. The results show that the shear strength of soil samples decreased with increase of water content, decrease of dry density and increase of the number of drying and wetting cycles; the incorporation of lime can improve the shear strength of soil samples, and lime content and soil sample maintenance time is positively correlated with the shear strength of soil samples.