Consolidation Behavior of Soft Soil Layer Under Embankment with Rapid Impact Compaction (RIC) Method
Abstract
The weekness of soil bearing capacity and the large settlements are the problems that often occur in landfill soils. These soil characteristics lead to a greater potential for collapse and compression. The time of compression on soft soils can also take up to hundreds of years. To overcome those condition, an effective soil improvement method is needed to increase ground improvement to make it gain strength. This study aims to obtain consolidation values in the soft soil layers of the Prefabricated Vertical Drain (PVD) model, and landfill deformation values that are compacted using the Rapid Impact Compaction (RIC) method. The soft soil material from the engineering campus of Gowa Regency, South Sulawesi. The stone sand material from the Sand Mine location on Borisalo village, Parangloe sub-district, Gowa Regency, South Sulawesi Province. The research method uses an experimental test that starts with testing the physical and mechanical characteristics of soft soil and stone sand. The test soil sample was placed in a test box measuring 100 x 100 x150 cm, then reconstitution was carried out by allowing it to stand until water was saturated. The results showed that the consolidation method without PVD took 60 days with a settlement of 6.85 cm, while the consolidation using PVD decreased 8 cm for 40 days. The soil improvement method uses RIC for a load of 70 kg occurs the settlement is 10 cm, while a load of 90 kg the settlement is 11 cm for 6 hours. This proves that the soil improvement method using Rapid Impact Compaction is more effective than the consolidation method.
