Prediction method of air intake value of deformed soil based on vg model
A prediction method and technology of air intake value, which are applied in soil material testing, measuring device, suspension and porous material analysis, etc. The effect of convenient pore distribution characteristics of unsaturated soil, simple prediction model, and reduced calculation process difficulty
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Embodiment 1
[0025] like figure 1 As shown, the method for predicting air intake value of deformed soil based on the VG model provided in this embodiment includes the following steps:
[0026] Step 1. Measured matrix suction ψ under deformation conditions based on pressure plate tests 0 and measured mass moisture content w 0 series of measured data.
[0027] The instrument used in the pressure plate test is a volumetric pressure plate instrument. The air pressures are 5kPa, 10kPa, 30kPa, 80kPa, 160kPa, 280kPa, 450kPa, 700kPa, and 1250kPa. The water content of the sample mass can only be applied to the next level of pressure after the upper level is balanced, and finally the test data under different initial void ratios are obtained. Among them, the measured data include the measured matrix suction ψ 0 and measure mass moisture content w 0 . In this embodiment, as shown in Table 1 below, there are 10 groups of measured data.
[0028] Table 1 The measured data table of the soil-water ...
Embodiment 2
[0048] In the second embodiment, the specific prediction method is the same as that in the first embodiment, so it will not be repeated, only the specific data will be described: the measurement fitting parameter a 0 、m 0 , n 0 They are 0.5607, 0.03144, and 3.947 respectively. Substituting the measured fitting parameters and the k value with a void ratio of 0.97 after deformation into the prediction model of air intake value of deformed soil, the predicted air intake value of deformed soil is 6.79kPa, and the measured value is 5.70kPa.
Embodiment 3
[0050] In the third embodiment, the specific prediction method is the same as that in the first embodiment, so it will not be repeated, and only the specific data will be described: the measurement fitting parameter a 0 、m 0 , n 0 They are 0.5607, 0.03144, and 3.947 respectively. Substituting the measured fitting parameters and the k value with a void ratio of 0.90 after deformation into the prediction model of air intake value of deformed soil, the predicted air intake value of deformed soil is 13.29kPa, and the measured value is 10.42kPa.
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