Abstract: With the increasing demand for the underground space in the urban area, the various supporting systems for the deep excavations are developed and each of the system could be applied for dealing with the specific site geological and hydrological conditions. Both construction safety and the cost are critical to the selection of the appropriate excavation supporting method. The soft mucky soils have adverse geotechnical properties and high construction risk exists in the deep excavation projects in this soil. This paper presents a supporting system using steel sheet piles for a deep excavation project in soft mucky soils in Guangzhou City. The passive zone inside the excavation area was improved so that deformation of the supporting system could be reduced and they were well within the permissible range.

Key words: Mucky Soils, Steel Sheet Piles, Deep Excavation Displacement