Abstract: The high loess-filled project research is a new research topic in the field of geotechnical engineering with impressive prospects. In this paper, indoor compression consolidation and moistening tests are carried out for high loess-filled project researches in Yan’an new district; the influence factors of deformation characteristics of compacted loess are analyzed; the best fitting model of vertical pressure and strain of compacted loess is built; and also, the consolidation and moistening settlements of the 100 m high project are predicted under different compactnesses. The results show that: (1) The vertical pressure-strain curves of compacted loess can be expressed with Gunary model. (2) The lower compactness of compacted loess will produce collapsibility deformation under lower pressure, higher pressure does not; the moderate compactness does not produce collapsible deformation under lower pressure, but higher pressure does; with the continued increase of compactness, the compacted loess does not produce collapsibility deformation under both lower and higher pressure. (3) Under the condition of optimum water content, the settlements of the 100 m high project are predicted under different compactnesses, so as to guide the field compaction and test the quality of construction. (4) The higher the compactness of compacted loess is, the smaller the total amount of deformation is, the greater the amount of water moistening deformation ratio of the total amount of deformation is, the lesser the consolidation compression deformation ratio of the total amount of deformation is.

Key words: high loess-filled project, high pressure consolidation, deformation characteristic, Gunary model, secant modulus, correlation coefficient