Abstract
The method of soil improvement, using the combination of prefabricated vertical drain (PVD) and preloading, was used to accelerate the process of consolidation and the consolidation settlement in the runway of Kualanamu International Airport, which was constructed on the soft soil sediment like silty clay. In this research, the investigated area was the runway of Kualanamu International Airport zone I which had 11 meter-thickness of soft soil. Geotechnic instruments surveyed was settlement plate. Monitoring was done toward the behavior of landfill such as basic soil settlement. The result were compared with the analysis of finite element method of full scale in Mohr-Coulomb model by verifying the vertical drain of asymmetric unit cell and equivalent plane strain unit cell condition. The results of the research showed that there were an interesting behavior between the data in field observation and finite element of Mohr-Coulomb model. It was also found that the result of soil settlement of finite element method of Mohr-Coulomb model was closed to the result of settlement plate monitoring.
Highlights
Due to the rapid development of urbanization and the population increasealong coastal lines, exploitation of undeveloped low-lying areas has became a necessary strategy for many countries [1]
Development of urban transportation and expansion occurred in North Sumatra, this occurred at the turn of Polonia Airport with the new Airport, known as Kualanamu Airport, located in Kualanamu area, North Sumatra
Using prefabricated vertical drains (PVDs), means that the drainage path is shortened from the thickness of the soil layer to the radius of the drain influence zone, which accelerates consolidation [3]
Summary
Due to the rapid development of urbanization and the population increasealong coastal lines, exploitation of undeveloped low-lying areas has became a necessary strategy for many countries [1]. It is necessary to improve the soft soil conditions. Preloading of soft clay with vertical drains is one of the most popular methods used to increase the shear strength of soft soil and control its post-construction settlement.Since the permeability of soils is very low, consolidation time to the achieved desired settlement or shear strength may take too long [2]. Using prefabricated vertical drains (PVDs), means that the drainage path is shortened from the thickness of the soil layer to the radius of the drain influence zone, which accelerates consolidation [3]. Published under licence by IOP Publishing Ltd improvement by prefabricated vertical drains (PVDs) combined with preloading is one of the most successful applications to this site [5]
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