红黏土崩解特性试验研究

摘要

为了研究不同含水率和温度下红黏土的崩解特性,将取自桂林的红黏土制备成不同含水率试样,通过自制的试验设备对红黏土进行崩解试验.考虑红黏土吸水增重的影响,每次崩解试验进行一次平行吸水试验,用吸水试验的结果修正崩解量-时间关系曲线,从而提出新的崩解量计算公式.本次试验探究在不同含水率和温度下红黏土的崩解特性.试验结果表明:崩解量随含水率的增加而减少,且含水率超过25％,红黏土在2h内基本不发生崩解;崩解量随温度的升高而增加,但在自然环境下红黏土的崩解对温度不敏感.通过对含水率和温度的综合分析表明,在自然气候范围内,含水率是土体崩解的主要影响因素.%In order to study the disintegration characteristics of red clay,red clay from Guilin is prepared into different water content samples,and the red clay is disintegrated by the homemade test equipment.Considering the effect of red clay on water absorption,a parallel water absorption test is carried out for each disintegration test.The disintegration-time curve is corrected with the results of the water absorption test,and a new dissolution calculation formula is proposed.In this experiment,the disintegration characteristics of red clay at different water content and temperatures are investigated.The results show that the amount of disintegration decreases with the increasing water content,and the water content is more than 25％.The red clay does not decompose in 2 h;the amount of disintegration increases with the increasing temperature,but in the natural environment,the disintegration of clay is not sensitive to temperature.The comprehensive analysis of moisture content and temperature shows that the moisture content is the main influencing factor for soil disintegration in the natural climate range.