CBR value which reflects the capacity of partial soil resisting shear failure is an important testing standard of embankment filling quality. Based on the background of improving project scheme of high limit liquid soil,a series of indoor tests was carried out to study bearing ratio influencing factors of the obvious regional characteristics of high liquid limit soil mixed with soil,and the influence rule of water content, swelling rate,dehydration rate of the high liquid limit soil in different sand content and different wet and dry cycles on CBR value was obtained.The results showed that water is the main reason of expansion shrinkage and differences of CBR value.The action of sand and fracture dominates at the earlier stage and the later stage of dry-wet circulation, respectively.The high liquid limit soil should be filling in the deep 93 area,but after improved by sand,it can fill in the relatively lower 94 area.
