| Author | Pipat Laowattanabandit |
| Call Number | AIT Thesis no.GE-96-24 |
| Subject(s) | Tunneling--Thailand--Bangkok
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| Note | A thesis submitted in partial fulfilment of the requirement for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-96-24 |
| Abstract | Regarding to increasingly demand of better standard of living in Bangkok where the pollution and traffic conditions become worse, the third dimension offered by underground space have to be used for new infrastructures. To develop such structures, ground movements are inevitably caused by the construction of these projects. This research is intended to study ground movements associated with bored tunnelling in Bangkok subsoils. It focuses on G-BC-B5 project of Metropolitan Waterworks Authority(MWA) and Bangkok Wastewater Treatment Tunnel Stage I of Bangkok Metropolitan Administration(BMA) since these two projects have been done instrumentation monitoring for study of ground movements. This monitoring results on both the tunnel and shaft have been analyzed and evaluated. The studies were concerned with relating deformations under undrained condition, i.e. immediate settlement. The observed maximum surface settlements around 12-20 mm with exceptionally 30-40 mm occurred at the shield face passing far enough to be considered as the results from shield tunnelling. The surface settlement profiles of each monitoring lines are shown with approximate curves. The volume of settlement troughs varied between 3-5%. Predictions of ground movements caused by tunnelling in stiff Bangkok clay were proceeded, by both Empirical and Numerical method. The numerical analysis by FLAC program was undertaken to investigate the ground movement and compared with the observed values. According to empirical prediction, Schmidt(1969)'s method and O'Reilly and New(1982)'s method give the value of "i" agree well with the observed values. While the Glossop's design curve(l987) and Norgrove (1978) yield comparable volume loss value to the observed value. By using the FLAC program, the prediction yield a fewer value of maximum surface settlements and larger width of settlement trough when compared to the observed values. However, the characteristic of subsurface ground movement agree well between the predicted and observed values. The pertinent methods, which have been considered practically being applicable for Bangkok subsoils, were used to predict the ground movement that will occur associated with the construction of big bored tunnel for subway in Bangkok. |
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-96-24 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Noppadol Phien-wej; |
| Examination Committee(s) | Balasubramaniam, A. S. ;Bergado, D. T.; |
| Scholarship Donor(s) | Electricity Generating Authority of Thailand(EGAT); |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology |