List of products by author: S.-W. Lee

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  Application of Liquid Air Refrigerant to Artificial Ground Freezing in Enclosed Subsea Tunnels

  Abstract: Subsea tunnels are highly vulnerable to seawater intrusion caused by high water pressure during construction. The artificial ground freezing (AGF) will be a promising alternative to conventional reinforcement methods. Use of brine as a refrigerant is disadvantageous because of its longer freezing time due to the high boiling point. On the other hand, liquid nitrogen, which can freeze saturated...

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  Tunnel excavation effect on pre-existing underground structure

  Abstract: The scaled model tests of closely-spaced twin tunnel by using homogeneous material are per- formed and induced displacements are measured around the tunnel openings during excavation. The influence of separation distance between tunnels and the coefficient of earth pressure (K) on the behavior of closely-spaced tunnel are investigated. The results are expressed by the induced displacement...

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