结构面中粘土矿物及含水率变化对边坡稳定性影响的试验研究

以南京某边坡结构面中的滑带土为研究对象,定量分析不同的滑带土颗粒级配情况下,岩质边坡结构面中粘土矿物含量及含水率的变化对边坡稳定性影响机制及变化规律.随着粘土矿物的增加,安全系数值整体上呈现减小的趋势,安全系数在45％～55％之间时达到最低;随含水率的增加,安全系数值也呈下降的趋势.采用了粒子群算法对试验成果作以解析,结果显示,随着粘土矿物含量的增加,安全系数的变化为非线性,但始终表现出较好的相关性,其相关系数由小变大;安全系数值与含水率呈现出一种负相关的线性关系,且保持较高的相关性,相关系数在0.90以上,较符合一般的自然规律.

Experimental Study on the Effects of Water Content and Clay Material on Stability of Sliding Zone Soils

In order to analysis the stability of a Nanjing slope,a quantitative analysis through test method was carried out.Using test method to reveal change in clay minerals and water content of structural plane influence the strength parameters c、φ and F of rock slope.Some results were present：1） the safety factor was decreased with the increase of clay minerals; it reaches the minimum between 45 ％ ～ 55 ％ ; 2） the safety factor was decreased with the increase of water content.Using the particle swarm algorithm analysis the test results、it showed that with the increase in the content of clay minerals,the safety factor of change is non-linear,but always showed a good correlation,the correlation coefficients ranging from small to large; the safe coefficient values and water content showed a negative correlation linear relationship and maintain at a high correlation,the correlation coefficient reached 0.90 or more,it is in line with the general laws of nature.