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Nonlinear Modulus of Subsoil Reaction

Nonlinear model describes dependence of the modulus of subsoil reaction kh - i.e. change of kh in between the threshold values corresponding to failure due to passive earth pressure Tp and active earth pressure Ta - see figure (the modulus of subsoil reaction is given by the slope of the curve; for pore pressure at rest acting on a structure it is possible to consider the value of kh1). This model also accounts for spring supports and forced deflections of the structure, various boundary conditions, application of struts and anchors, etc.

Interaction model to determine kh

The values of the modulus of subsoil reaction can be derived subsequently from the values of secant modules of subsoil reaction (CUR 166) - see figure:

Interaction model to determine kh - CUR 166