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  Conceptual Scheme for Accommodating Rock Processing, Concrete Batching and Asphalt Production Plants in Caverns

  Land supply is a pressing issue that constrains the sustainable development of Hong Kong. The Government has long recognized the potential opportunities and benefits of cavern development as one of the measures to ramp up the land supply. Cavern space would also represent an attractive option to meet the land demand for construction industry which is often seen as unwelcome land use at surface sites especially for visual and environmental aspects. If carefully planned and designed, it can provide a more environmental friendly solution and achieve development gain when compared to surface land option. Three specific types of construction-related facilities, viz. concrete batching, rock processing and asphalt production plants are of relatively low priority amongst different types of development land demands. Thus, there is strategic need for exploring suitable means as an alternative to surface land option to support local construction industry. A study is now underway to examine the technical feasibility of housing these facilities in caverns. This paper presents details of the conceptual scheme with due regard to the technical constraints and planning requirements on housing these facilities within cavern space, particularly on cavern fire safety design including benchmarking with overseas practice, operation and maintenance issues together with the views of stakeholders received during the study process. In Hong Kong, cavern developments have gradually gained acceptance by the public and major stakeholders and its application to accommodate the three specific uses should be proactively considered. The recent development and way forward for implementation of this respective underground solution for these specific uses are introduced in this paper.

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