The Design and Construction of a Fast Track 16 Hectare, 18 m Deep Basement in Soft Clay in Singapore
Location
Chicago, Illinois
Date
03 May 2013, 1:25 pm - 1:50 pm
Abstract
Singapore’s newest integrated resort, Marina Bay Sands, was completed in record time and has garnered numerous engineering awards. The development sits on recent sand reclamation, which in turn rests on deep soft marine clay deposits. With an average excavation depth of around 18 meters, the 16 hectare (39 acre) waterfront development involved some of the largest marine clay excavation in Singapore. About 2.8 million cubic meters of fill and marine clay were excavated from the site equating to about 800 trucks a day for two years. To overcome the challenges of the bulk excavation and minimize shoring in difficult soil environments, innovative excavation solutions were developed to enable an accelerated construction timetable for this project involving densely packed site works with complex staging and interface issues. These included the use of unsupported circular excavations up to 130 meters in diameter and continuously reinforced 1.5 meter thick diaphragm walls acting in shear. To add to the challenge, a 35 meter deep ‘cut and cover’ tunnel next to the Singapore’s longest bridge, the Benjamin Sheares Bridge, was required. To enable the bridge to tolerate the inevitable imposed lateral displacements of an abutment, the structural system of the existing bridge was modified to allow it to safely articulate in plan.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Pappin, J. W., "The Design and Construction of a Fast Track 16 Hectare, 18 m Deep Basement in Soft Clay in Singapore" (2013). International Conference on Case Histories in Geotechnical Engineering. 5.
https://scholarsmine.mst.edu/icchge/7icchge/session14/5
The Design and Construction of a Fast Track 16 Hectare, 18 m Deep Basement in Soft Clay in Singapore
Chicago, Illinois
Singapore’s newest integrated resort, Marina Bay Sands, was completed in record time and has garnered numerous engineering awards. The development sits on recent sand reclamation, which in turn rests on deep soft marine clay deposits. With an average excavation depth of around 18 meters, the 16 hectare (39 acre) waterfront development involved some of the largest marine clay excavation in Singapore. About 2.8 million cubic meters of fill and marine clay were excavated from the site equating to about 800 trucks a day for two years. To overcome the challenges of the bulk excavation and minimize shoring in difficult soil environments, innovative excavation solutions were developed to enable an accelerated construction timetable for this project involving densely packed site works with complex staging and interface issues. These included the use of unsupported circular excavations up to 130 meters in diameter and continuously reinforced 1.5 meter thick diaphragm walls acting in shear. To add to the challenge, a 35 meter deep ‘cut and cover’ tunnel next to the Singapore’s longest bridge, the Benjamin Sheares Bridge, was required. To enable the bridge to tolerate the inevitable imposed lateral displacements of an abutment, the structural system of the existing bridge was modified to allow it to safely articulate in plan.
