Effects of Tunnel Excavation on Adjacent Buildings in Ho Chi Minh Urban Area

• Main Authors: T.H., Tin, Karnawati, Dwikorita, Fathani, Teuku Faisal
• Format: Conference or Workshop Item PeerReviewed
• Language: English
• Published: 2010
• Subjects: Civil Geotechnical Engineering; Civil Engineering; Engineering
• Online Access: https://repository.ugm.ac.id/136806/1/International%20Symposium%20and%20The%202nd%20AUN%202010-Effects%20of%20Tunnel%20Excavation%20on%20Adjacent%20Buildings%20in%20Ho%20Chi%20Minh%20Urban%20Area.pdf; https://repository.ugm.ac.id/136806/
• Institution: Universitas Gadjah Mada

Prediction on damage to existing buildings due to tunnel excavation is necessary for any tunnelling projects especially in urban area of Ho Chi Minh City where the Ben Thanh-Ba Son Railway Twin­Tunnel alignment underlay difficult subsoil condition of clayey sand, medium dense and presence of groundwater. The 3-storey building located close to the alignment has been focused in this paper. Both of empirical method and finite element method (FEM) were used in this study. The empirical method so called “Greenfield” that was used for preliminary assessment. In detail evaluation, the Finite element method was applied. ln the first simulation, the building was modelled with its equivalem piers; in the second case, the building was modelled with its real piles. According to analysis results, the building was predicted based on the Rankin damage classification (1988). Analyses of tunnel excavation were carried out with various volume losses of 1.0% to 4.0%. Greenfield pointed out that the settlements were increased significant after each phase of excavation whereas analyses from Finite Element method showed the building settlement was slightly increased. Effects of excavation of Tube 1 on the building are less dangerous than from Tube 2 that were predicted in three approaches. Most analyses from the numerical model in both of two the simulations predicted similar damage categories and less than from the Greenfield. Finally, the building was predicted approximate damage category 3 due to tunnel excavation with occurrence of the volume loss of 3.0%.