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Abstract: In recent years, underground roads in the urban area in South Korea have been planned to be long road tunnels with a depth of 50m or deeper. And the turnout sections that connect to ground roads nearby have also been planned to be built as large cross-section tunnels based on good rock conditions. However, the construction records and design cases involving the ways to secure stability on these...
Abstract: Ground assessment processes based on face mapping are closely related to the stability and economic feasibility of NATM tunnels while the expertise of field engineers is a highly important factor. In Korea, tunnel collapse accidents and economic losses have continued to occur due to technical, economic, and institutional problems during NATM tunnel construction. Such problems have led to...
Abstract: Because of insufficient spaces for road facilities, traffic congestion at a dangerous level, negative views to construction environment and soaring land price in metropolitan areas, coupled with developed excavation and tunneling technologies, needs for building deep underground roads have been increasingly growing. Korea has been planned or designed the construction: for example U-Smartway was...