Method for calculating relative permeability coefficient of unsaturated soil
A technology of relative permeability coefficient and calculation method, which is applied in the calculation field of effective prediction of relative permeability coefficient of unsaturated soil, can solve problems such as difficult water drainage, time-consuming, manpower and material resources, obstacles, etc., to reduce workload and improve The effect of work progress
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[0030] The invention discloses a calculation method for predicting the relative permeability coefficient of unsaturated soil under different initial void ratio conditions. The method includes the following steps:
[0031] Determine the type of soil sample to be tested, and select a certain initial void ratio As a reference state, the parameter a of van Genuchten SWCC formula 1 is calibrated using the soil-water characteristic curve (SWCC) in the reference state 1 , b 1 ;
[0032] s = a ( S e b 1 - b - 1 ) 1 b - - - ( 1 )
[0033] In the present invention, the pr...
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