Hubungan Sifat Sifat Fisik Tanah Yang Dicampur Dengan Kapur Terhadap Stabilitas Tanah Lempung Pada Tanggul

Abstract

In embankment planning, it is necessary to consider the influencing factors such as the material
for making the embankment, slope stability, guard height, slope protection, the width of the
embankment, the slope and dumping facilities. Some areas in Indonesia do not have good quality
soil. For instance, the soil in Palembapang Village, Kalianda, South Lampung. Regarding the
issues, soil maintenance is mandatory to be done to increase the physical parameters of the soil so
that the carrying capacity of the soil is maintained. The results shows that at the mixture rate of
0%, 4%, 8%, 12% and 16%, the lime is classified as CL (clay low plasticity)which indicates nonorganic
clay with low to medium plasticity. The lab testing result of the sample of natural soil
shows cohesion value of 0,1813 kg/cm2 and shear angle value of 20o. After stabilizing process
was done using additives, the cohesion value and shear angle value were significantly increasing.
It proves that lime can increase soil density as both value increased. In the natural soil sample,
the value of the safety factor was still below the safe limit. Another lime additive was added to the
soil sample with lime addition of 16%. None of the safety factor limits were below average after
the process. In conclusion, lime additive can decrease the plasticity (liquid limit and plasticity
index), enhancing strength and durability, reducing water absorption and soil development as
well as strengthening the stability of the embankment.