Deformation Behavior of Gedebage’s Soft Clay against Lightweight Embankment Construction
Iskandar (a), A K Somantri (a), A Febriansya (a*), A B Wicaksono (b), A M Hariono (b)

(a) Civil Engineering Department, Politeknik Negeri Bandung, Jln. Gegerkalong Hilir, Ds. Ciwaruga, Bandung, Indonesia
*aditia.febriansya[at]polban.ac.id
(b) Student of Civil Construction Study Program, Civil Engineering Department, Politeknik Negeri Bandung, Jln. Gegerkalong Hilir, Ds. Ciwaruga, Bandung, Indonesia

Abstract

In the process of construction and the service period of highway construction, problems often occur because of relatively soft base soil conditions, for example the soil located in Gedebage Area, Bandung City. Problem that occur in the form of a large base soil settlement over a long period of time. One of the solutions carried out in this study is the use of a mixture of soft clay soil stabilized by 25% fly ash and 0.4% expanded polystyrene (EPS) as a lightweight embankment material. This study compares of deformation on base soil between lightweight embankment and control embankment under load, and to obtain total settlement at each stage of full-scale construction with limit equilibrium method using GeoStudio 2016. The research method used is by loading the prototype of embankment model with 1:10 laboratory scale. Soil parameters obtained from the verification results were used to model the full-scale construction and stage construction with GeoStudio 2016. The result shows that by using 0.4% EPS and stabilized with 25% fly ash can reduce the total base soil settlement by more than 50%. In the analysis of the full-scale lightweight embankment construction model with GeoStudio 2016 software, total base soil settlement of 268.927 mm was obtained.

Keywords: Soft Soil, Embankment, Expanded Polystyrene, Deformation, Stage Construction

Topic: Civil Engineering