Abstract: This paper presents a case history of deep excavation support in Binzhou City, which is located in the Yellow River Alluvial Plain. The subsurface soil consists of saturated silty fine sand soil strata and the site is surrounded by the building structures. In the selection of deep excavation supporting method, this paper compares the advantages and disadvantages of Soil Mixing Wall (SMW) construction method combined with ground anchors and soil nails and the grouted soil nails with some local SMW method. The objective of the selection is to ensure the safety first. This paper also discusses the applicability, complexity, cost and redundancy during the construction.

Key words: yellow river alluvial plains, silty fine sand layer, deep excavation supporting structures, soil mixing wall construction method, grouted soil nails