强夯法控制指标影响因素的关联度分析

Correlation degree analysis of influencing factors of dynamic compaction control index

针对强夯法施工中各控制指标影响因素权重问题,应用灰色关联理论,以夯沉量、夯间距、有效加固深度作为主行为因子,以夯击能、夯击数、含水量、孔隙比等影响因素作为行为因子,建立强夯法控制指标影响因素的关联度计算模型,分析计算强夯法各控制指标影响因素的关联度。结果表明:强夯夯沉量各影响因素关联度由大至小依次为夯击能、干重度、孔隙比、含水量、夯击数,强夯间距各影响因素关联度由大至小依次为夯锤底面面积、夯锤直径、夯锤重量、夯锤落距、夯击能,有效加固深度各影响因素关联度由大至小依次为干重度、夯击能、夯锤底面面积、含水量。该研究可为强夯法施工中各控制指标预测模型的参数选取提供理论依据。

This paper is concerned with the weight of influencing factors of each control index in dynamic compaction construction.The study involves developing the calculation model of correlation degree of influence factors of dynamic compaction control index using the theory of grey correlation and taking tamping settlement,tamping spacing,and effective reinforcement depth as the main behavior factor,and tamping energy,tamping number,water content and void ratio and other influence factors as behavior factor,and analyzing and calculating the correlation degree of the influence factors of the control indexes of dynamic compaction method.Results show that correlation degree of influencing factors of dynamic compaction settlement is arranged in the order of size:compaction energy,dry weight,void ratio,water content,and compaction number;the correlation degree of each influencing factor of dynamic compaction spacing follows the order of size:bottom area of rammer,diameter of rammer,weight of rammer,dropping distance of rammer and energy of rammer;and the correlation degree of effective reinforcement depth is in the order of size:dry weight,and ramming energy,rammer bottom area and water content.The research could inform the parameter selection of the prediction model of each control index of dynamic compaction construction.