Small-Scale Mobility Tests in Fine-Grained Layered Soils.

摘要

Laboratory single-wheel tests were conducted with a 2.50-4 tire on uniform fine-grained soil and on two conditions of thick-layered, fine-grained soils: condition I in which a soft layer was placed over a firm layer, and condition II in which a firm layer was placed over a soft one. In both cases, the smallest ratio of layer thickness to tire width tested was 0.33. The results of the baseline tests on uniform soil showed that the WES numeric prediction system, which had not hitherto been used for such a small tire, will predict the performance of the small tire as accurately as it predicts the performance of a large tire. The system also can be used in predictions for layered-soil systems, if the soil strength of the top layer is used in the numeric and as long as the lower layer is relatively strong in relation to tire loading.