昆明新机场红粘土填筑料击实试验研究

Study on Compaction Test of Red Clay Filling Material for Kunming New Airport

介绍了击实试验的基本原理和影响因素,并对昆明新机场红粘土进行击实试验研究。对于红粘土,干法与湿法击实试验备样方法不同,得到的最大干密度差别较大,二者的平均差异绝对值为0.070 g/cm3,相对差异为4.5%;平均最佳含水率绝对差异为4.2%,相对差异为9.7%。红粘土最大干密度和最佳含水率的测定宜根据现场施工土料取样进行室内击实试验或三点击实试验;缺少现场试验成果时,建议最佳含水率采用23.0%,最大干密度采用1.610 g/cm3。

This paper introduces the basic principle and influence factors of compaction test,and carries out compaction test study on red clay of Kunming new airport.For red clay,dry and wet compaction test have different methods for sample preparation and have larger difference in the maximum dry density,i.e.absolute average difference of 0.070 g/cm^3 and relative difference of 4.5 %.In addition,the absolute average differencein the optimum water content is 4.2 % and relative difference is 9.7 %.The maximum dry density and the optimum water content of red clay should be measured according to indoor compaction test or three-point compaction test on site construction soil sample.If lacking of site test result,23.0 % is suggested as the optimum water content and 1.610 g/cm3 is suggested as the maximum dry density.