Bearing capacity of synthetic granular column enchased reinforcement geogrid on soft soil

Abstract

The soil reinforcement method using columns has been widely used in some places. Stones or sand and stones are commonly used as fillers for those columns. The availability of natural stones constitutes a major constraint in some areas where there are no coarse aggregates (gravel). This research aims to analyze the use of artificial granular columns using geogrids on soft soil reinforcement. As column fillers, geogrid wrapped synthetic gravel was used. Variations in the shape of the synthetic gravel included a triangular prism, cube, and hexagonal prism. The test tub used was 800 mm in diameter, with a height of 1,400 mm. Column loading was undertaken for each variation in the size of synthetic gravel, plus a combination of the three sizes. The amount of column loading for each variation was 30 kN. Based on results of the loading test, the largest carrying capacity was generated by columns with fillers of synthetic gravel with a hexagonal prism shape and a combination of the three variations.