| Author | Ghimire, Ravi |
| Call Number | AIT Thesis no.GE-18-11 |
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering in
Geotechnical and Earth Resources Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Nowadays, deep excavation has become an inevitable option for the construction of various multistory buildings and underground structures. Lack of proper knowledge on subsurface soil conditions and experience on deep excavation analysis in Jakarta, this study aimed to establish the key geotechnical properties and numerical models for modeling deep excavation in Jakarta. The performance of the excavation supported by concrete diaphragm wall for Astra Tower on Sudriman Street in Jakarta, Indonesia is discussed. The excavation was approximately 22 m deep and construction was carried out by top-down method. The lateral movement of the wall was monitored by the inclinometers and the results were compared with PLAXIS 2D finite element back analysis results. The calculations served for an assessment of predicted wall displacements, deformations of soil surface around the excavation and internal forces in subsequent stages of the excavation. Parametric studies were also carried out to identify important variables controlling the mechanisms of soil-structure interaction. The principal parameters considered in the study include soil type, depth of excavation, wall embedment depth, wall stiffness, and strut spacing. These variables were used to conduct a series of finite element analyses using simplified geometry and ground conditions for the purpose of achieving the objective of this thesis. Results of these analyses were recorded in terms horizontal displacement of the diaphragm wall, ground settlement behind the diaphragm wall, and bending moments induced in the diaphragm wall due to an adjacent deep excavation. In 2D finite element analyses, the numerical results showed that the maximum wall deformation at final excavation stage was around 0.19% of excavation depth and located near the base of excavation. The ground settlement was concave type and the ratio of maximum ground settlement to maximum horizontal wall movement was 0.68. |
| Year | 2019 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Chao, Kuo-Chieh; |
| Examination Committee(s) | Noppadol Phien-wej;Pham Huy Giao; |
| Scholarship Donor(s) | AIT Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2019 |