... subway construction. This paper describes the successful application of geological prospecting and grouting assessment at the tunnel site of Qingdao subway line No. 1. The study area is located in a coastal bedrock fissure water distribution area. It was decided to conduct surface grouting to reduce...

... such as water inrush and mud gushing, pose a major threat to metro construction. Geophysical survey techniques provide quick and relatively inexpensive ways to detect adverse geological structures ahead of the tunnel face. Left line of the R3 metro tunnel in Qingdao, China will pass an aquifer sand layer under...

...-inversion algorithm was used to realize the array source TEM differential imaging. This proposed algorithm was applied to the real world field data acquired in Qingdao metro subway tunnels. The interpretation results were consistent with the verification excavation results. Li et al. proposed a new...

... for geological detection and grouting assessment: A case study in Qingdao Subway Tunnel, China : Journal of Environmental and Engineering Geophysics , 24 , 629 – 639 . Hwang, J., Kim, D...