Deformation characteristics of compacted Malan loess in Yan'an region under high consolidation pressure

To investigate the deformation behavior of loess in the typical "Y" shape long and narrow gully landforms, a series of one-dimensional consolidation tests are carried out indoor under high-pressure conditions. Test results show that the Gunary Model is better than the hyperbolic model or the exponential function to represent the relation between vertical compressive stress and vertical compressive strain of compacted Malan loess. Using secant modulus, the modified formulas of deformation of foundation with compacted Malan loess are constructed to calculate the deformation considering the variation of loading, water content and compactness. The relation of secant modulus E-soi and the reciprocal of water content 1 / w is in the form of quadratic polynomial. The widely used linear relation formula of secant modulus E-soi and compactness K is not consistent with the actual situation. Research results have an important reference value to the design and construction of gully type high loess-content landfill projects.