摘要
Abstract
Compaction quality of soil-rock mixed subgrade is usually characterized by compaction degree.A method for detec-ting the degree of compaction of soil-rock mixed subgrade under the condition of static penetration is put forward.Firstly,the correlation between the degree of compaction of soil-rock mixed subgrade and the influencing factors is analyzed by combi-ning Pearson's simple correlation coefficient and partial correlation coefficient;secondly,based on the static penetration test,the penetration load displacement analysis model of soil-rock mixed subgrade is established to obtain the vertical displacement of subgrade under the penetration load;finally,based on the displacement analysis model,the objective function of inverse analysis optimization is established,and the butterfly algorithm is used to solve the objective function to obtain the initial po-rosity of soil,and then the compactness of soil-rock mixed subgrade is calculated.The test results show that the pro-posed method can accurately detect the dry density,porosity,settlement and its variation with depth of soil-rock filler,so as to obtain more accurate degree of compaction of subgrade.关键词
静力贯入试验/皮尔逊简单相关系数/荷载位移分析模型/路基压实度/蝴蝶算法Key words
static penetration test/Pearson's simple correlation coefficient/load displacement analysis model/degree of com-paction of subgrade/butterfly algorithm分类
交通工程
