EVALUATION OF SOIL CONSTITUTIVE MODELS FOR CASE DEEP EXCAVATION IN JAKARTA

• Main Author: Hartanto, Cevin
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/76419
• Institution: Institut Teknologi Bandung

The development of constitutive soil models and their application in computer programs have enabled the widespread implementation of numerical analysis based on the finite element method in solving geotechnical problems. However, there is still significant confusion among practitioners when selecting the constitutive model that closely resembles the actual conditions in specific geotechnical cases. This confusion often leads to uncertain modeling outcomes. Furthermore, there is a limited number of comprehensive research studies explaining the performance of existing constitutive models when used in geotechnical projects, particularly considering the soft soil conditions prevalent in Jakarta, Indonesia. This study aims to conduct a numerical investigation by evaluating three constitutive soil models: the hardening soil model, the hardening soil model with small strain, and the soft soil model for deep excavation cases in Jakarta. The evaluation will involve verifying the lateral wall deformation using field instrumentation readings, specifically inclinometers. Once the evaluation of the constitutive models is obtained, an iteration of input parameters will be performed for the shear strength and stiffness parameters to identify correlated input parameters that can effectively represent the field readings. The evaluation results indicate that changing the constitutive model in the analysis of deep excavation cases in Jakarta does not have a significant impact. Therefore, the hardening soil model is selected as it is commonly used in practical applications. By correlating the input parameters of the hardening soil model commonly used by practitioners, conservative values are obtained. An iteration of input parameters is then conducted to acquire values that are consistent with the field instrumentation readings, resulting in the parameters