Effectiveness of Stone Column Reinforcement in Flexible Pavements on Soft Clays Reviewed from Structural Analysis Using Plaxis 3D Software Pita U. A. W. P.1, b), Syahril S.1, a), Indra N. H.2, c)
1Master Study Program of Applied Infrastructure, Civil Engineering Department, Bandung State of Polytechnic, Bandung, West Java, Indonesia
2Department of Civil Engineering, Institute of Technology National, Bandung, West Java, Indonesia
Author Emails
a) Corresponding author: syahril_polban[at]yahoo.com
b) pitaarthapanjaitan[at]gmail.com
c) indranh[at]itenas.ac.id
Abstract
Flexible pavements on soft clay soils often cause many problems, such as the occurrence of soil settlement under the pavement caused by traffic loads and the length of time for soil consolidation. Thus, if a pavement is to be built on soft clay, the construction process must be carried out after the soil has fully consolidated to avoid settlement and ensure that the bearing capacity of the pavement is feasible. One method that can be used to strengthen soft clay is the stone column. To determine the effective stone column design, an analysis of the stone column, soft clay soil, and the pavement structure itself. The must-be-analyzed study was conducted using Plaxis 3D software. This research also planned the flexible pavement design using the Manual of Pavement Design (MDP) method Bina Marga 2024. This research aims to obtain the safety factor value, displacement value, and the design of stone column (SC) diameter and spacing that efficiently reduces the displacement value due to the traffic load acting on the flexible pavement. The optimum design of stone column was obtained by combining 0.8 m diameter and 1.7 m spacing. Stone column 0.8 m with 1.7 m spacing can increase the safety factor value by 28.44%, reduce the displacement values Ux and Uz by 38.46% and 50.27%, respectively, and the displacement value Uy by 4.27 cm.
Keywords: Plaxis 3D, stone column, flexible pavement, safety factor, displacement
