토목섬유로 보강된 노상토의 지지력 증대 효과

Abstract

In this study, CBR tests were carried out to analyze the increase effect of bearing capacity for subgrade reinforced by geotxetile frequently used in recent, and observed the changes of bearing capacity as the number of blows for 4 soil types. As a result of CBR tests, maximum bearing capacity ratios in case of kaolinite contents 0%, 10%, 30% and 50% in 50mm penetration depth were 3.1, 4.5, 8.5 and 8.8, respectively. Therefore, the effect of reinforcement by geotextile is on the increase in proportion to kaolinite contents, and in inverse proportion to the number of blows in same condition. The changes of BCR were 1.8 〜 3.1 in reinforced soil with kaolinite contents 0%, 2.2~4.5 in reinforced soil with kaolinite contents 10%, 5.1 ~ 8.5 in reinforced soil with kaolinite contents 30%, and 7.0〜 8.8 in reinforced soil with kaolinite contents 50%. It means that the range of BCR in each sample is on the increase in inverse proportion to kaolinite contents, but it decreases on the basis of kaolinite contents 50%.