THE EFFECT OF SOIL STABILIZATION AND REINFORCEMENT ON THE STABILITY OF EMBANKMENT ON SOFT SOIL

The construction of toll roads in South Sumatra faces two problems. First, most the road sections are built on soft soil deposits, so must be improved to speed up consolidation process and improve bearing capacity. Second, embankment required reach design elevation is quite high that reinforcement needed slope stability. This paper contains results a study effect improvement using PVD vacuum pressure, installation geotextile layers pile at toe slopes, stability embankment. analysis were carried out data obtained from Kayu Agung – Palembang Section 1A, including geometry data, stratification, configuration reinforcement. Slope was Morgenstern & Price method which integrated SLOPE/W program. show safe height for original condition 3.5 m while 6 m. Analysis made properties after ground with pressure shows FoS still below 1.5. presence performance increased 2.410. 1.762 traffic load induces combined 35 kPa.