Evaluation of the penetration rate of a hard rock TBM used in a water diversion tunnel project in Northern Thailand | |
| Author | Suphawit Phrarom |
| Call Number | AIT Thesis no.GE-20-16 |
| Subject(s) | Tunneling--Thailand (Northern) Boring machinery--Thailand (Northern) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Geotechnical and Earth Resources Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | At the Mae Tang-Mae Ngad diversion tunnel project, the double shield TBM was designed to excavate along the mountainous terrain of northern Thailand, which has difficult ground conditions due to the complex geological structure severe geotechnical problems. It has a distance of more than 25 km of tunneling. The overall objective of this thesis is to compare existing performance-predicted models. To find the most accurate model for hard rock tunnel boring based on the collected data. The penetration rate was calculated using various models. And compare it to the actual penetration rate achieved. The prediction model was based on the NTH model, the NTNU model by Bruland (2000), the NTNU model by Macias (2016), the model by Hassanpour et al., and the model by Farrokh et al.” “Most performances predicted models that use both gross thrust and net thrust as input parameters show predicted results compared to actual penetration rates. Conservative results for the NTH (1994) and NTNU models by Bruland (2000). The Hassanpour and the Farrokh model predicted results are overvalued. The NTNU model by Macias (2016) became the most accurate.” “Sensitivity analysis and a gray relational analysis of various parameters are used to determine the most influential parameters related to actual and predicted penetration rates. For this purpose, when net thrusts were calculated in the NTH and NTNU models, the rock properties had a more significant influence than the machine parameters. However, the parameters of the machine are more important than the rock properties in the Hassanpour (2011) and Farrokh (2012) models.” To recommend that more than one prediction model be used to calculate the TBM penetration rate to avoid erroneous potential assessments that could incur a high-cost burden on the associated tunnel project. And all predicted results presented herein are specific to the MTMG diversion tunnel project. Results may vary depending on the parameters considered. |
| Year | 2021 |
| 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;Noppadol Phien-Wej (Co-Chairperson); |
| Examination Committee(s) | Pham, Huy Giao; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2021 |