ANALISYS OF ROAD EMBANKMENT STABILITY WITH GEOTEXTILE AND PVD REINFORCEMENT USING TWO-DIMENSIONAL FINITE ELEMENT METHOD
The Trans South Papua Road is a strategic project connecting Merauke Regency, Tanah Merah Regency, and Papua Highlands Province, spanning approximately 533.06 km. The soil conditions at the site are dominated by soft soil with thickness reaching up to 20 m, causing low bearing capacity issues and in...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/83571 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The Trans South Papua Road is a strategic project connecting Merauke Regency, Tanah Merah Regency, and Papua Highlands Province, spanning approximately 533.06 km. The soil conditions at the site are dominated by soft soil with thickness reaching up to 20 m, causing low bearing capacity issues and instability of both cut slopes and road embankments. This study aims to improve slope stability and accelerate the consolidation process at km 168+770 of the Merauke-Tanah Merah section. The improvement method used is a combination of geotextiles to increase the safety factor, Prefabricated Vertical Drains (PVD) and preloading to accelerate the settlement process. Soil modeling uses the Mohr-Coulomb model with a two-dimensional finite element analysis method. PVDs are installed in a triangular configuration with 1 m spacing and 10 m length. Construction stages are optimized to achieve stability and settlement that meet Class I road requirements. Results show an increase in the safety factor from 1.3 to 1.7 under static conditions, and an acceleration of 90% consolidation time from 21.5 years to 204 days. This study also found that the smear effect was relatively insignificant in terms of settlement magnitude and duration. The combination of geotextiles and PVDs proved effective in improving embankment slope stability and accelerating the pore water dissipation process.
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