A Preliminary Study of the Economic Dimension of Underground Rock Caverns for Water Storage at Singapore

Shang, J. , Chua, Z., Peh, H. and Zhao, Z. (2018) A Preliminary Study of the Economic Dimension of Underground Rock Caverns for Water Storage at Singapore. In: 2018 World Engineering Education Forum - Global Engineering Deans Council (WEEF-GEDC), Albuquerque, NM, USA, 12-16 Nov 2018, ISBN 9781538677643 (doi:10.1109/WEEF-GEDC.2018.8629647)

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Abstract

Due to scarce land resources in Singapore, it is imperative to increase water storage capacities to meet the increasing demand of water to secure a sustainable development, which can be achieved in the underground by rock caverns. In this paper, a preliminary study on the effects of cavern span, height and radius on the cavern stability is presented to provide a guidance on the cavern construction in the context of Singapore. It is found that the radius of caverns should be around half of the span width (i.e., B/R=2) to reduce vertical displacement at the crown of cavern. The smaller the rock cover, the smaller displacement. The minimum rock thickness should be at least the same as the cavern span to eliminate excessive yielded element. Finally, rock support system is introduced to maintain the profile of caverns.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Shang, Dr Junlong
Authors: Shang, J., Chua, Z., Peh, H., and Zhao, Z.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
ISBN:9781538677643
Published Online:31 January 2019

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