| Author | Shrestha, Amal |
| Call Number | AIT Thesis no.GE-08-15 |
| Subject(s) | Tunnels--Thailand--Bangkok--Design and construction
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Geotechnical and Geoenvironmental Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-08-15 |
| Abstract | The upcoming South Blue Line Extension subway project, extended from Hualamphong station to Thapra station, is the second phase of the subway system in Bangkok and twin-tunnel will be excavated underneath densely populated urban areas and historical areas. One of the important issues in urban tunnelling is to predict the tunnelling induced surface settlement and the effect on adjacent pile foundation. This study deals with simplified 3D munerical simulations for analysis of tmmel-pile interaction of single and twin tunnels in the Bangkok Blue Line subway project. The construction of tunnel is simulated by convergence confinement method and its effect is studied for a single pile and pile group which are located at different transverse distances form tunnel axis. Firstly, the result of longitudinal and lateral settlement pattern is compared with observed settlement of Zone 23 of MRT Blue Line subway project. Secondly, the effect of tunnelling on different types of piles that are common in Bangkok is investigated. From the results of simulation of twin tunnel excavation, it is seen that the stress release parameter has profound effect on settlement, the higher value of stress-release parameter resulted in higher values of settlement. Furthermore, the use of undrained soil properties yielded to settlement values comparable to the observed field values whereas, the use of drained soil parameters over predicted the settlement. The analysis of pile deformation due to tunnelling was found to be broadly consistent with deformation zones proposed by Jacobsz (2001). It was further found that the magnitude of tunnel induced force depended on the lateral separation of the pile from the ttmnel and the location of pile tip with respect to the tunnel axis |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-08-15 |
| 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) | Park, Kyung Ho; |
| Examination Committee(s) | Dennes T. Bergado;Noppadol Phien-wej; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2009 |