Thrust 3: Underground Infrastructure  
Project ID: I3C12304
A study on Social Impact on Public towards Underground Cavern Development
Principal Investigator: Robert Tiong (Assoc Prof)
JTC Co-Principal Investigator: Chong Pui Chih and Chan Yihui
Status: On- Going
Abstract:
Singapore is developing and constructing several underground caverns in order to provide space for hydrocarbon storage and other industrial purposes. However, land-scarce Singapore needs new dimension and space for urban expansion and development as well; such demand could be met by creating new land by going underground for residential, commercial as well as complex industrial facilities and related infrastructures. Underground infrastructure can be categorized as a complex system that involves not only sophisticated technical structures but also extensive social organizations, whose resilience relies on smooth integration between technical and organizational apparatuses embedded in the system. Along with the construction of those underground caverns, the social issues become more and more critical because people need to spend longer time daily underground for longer time periods. The societal impacts include benefit analysis and stakeholders’ response towards underground facilities together with health assessment. The consideration of social impacts early in the planning of a development can lead to sustainable environmental development; improved relations between the developer, the planning authority and the local communities; a smoother planning permission process, and a viable economic return on the extra expenditure incurred. The study could provide comprehensive information for the decision making process and project management of the underground cavern developments.
Project ID: I3C12305
Shaft design optimization for construction and operation
Principal Investigator: Lu Ming (Vg Prof) and Zhao Zhiye (Assoc Prof)
JTC Co-Principal Investigator: Chong Pui Chih and Chan Yihui
Status: On- Going
Abstract:
Due to the relatively flat terrain in Singapore, vertical shaft shall be one of the major alternatives for accessing deep underground. The shafts will be used in construction, installation and operation phases and will cater for different modes of transportation. For the Jurong formation the shaft may penetrate reclamation material, residual soil, and weathered rock before reaching the solid bedrock. Structural design in the overburden (diaphragm walls or piling) and rock support in the bedrock section are crucial in ensuring stability and integrity of the shaft. Another aspect is how to prevent or reduce the water inflow into the shaft and provide a safe, comfortable and cost-effective construction and operation environment. The proposed study will look into optimization of the shaft design in terms of structural design, water seepage control, rock support, dimensions, means of transportation, cost and time for construction, as well as cost, efficiency and safety during operation.

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