Ou ZOU, Jian XUE, Na LI, Xin WANG, Rong YANG, Yuqiong LI. Inversion method of soil Mohr-Coulomb parameters based on dynamic cavity expansion model[J]. Optics and Precision Engineering, 2023, 31(5): 565
- Optics and Precision Engineering
- Vol. 31, Issue 5, 565 (2023)
Fig. 1. Penetrometer and spherical cavity expansion model
Fig. 3. Images of surfaces Π 1 and Π 2
Fig. 4. Intersection lines l 1 and l 2 and their intersection point under λ ≠0 and λ ≠3/4
Fig. 5. Lines L 1 and L 2 when λ =3/4 or λ =0
Fig. 6. Relationship between shear strength and average stress［25］
Fig. 7. Fitting of the resistance coefficients based on acceleration and velocity curves
Fig. 8. Image of the function f （β's ） and the relationship between penetration depth and initial speed
Fig. 9. Solution domain determined by dynamic cavity expansion model
Fig. 11. Acceleration curve and the time interval corresponding to the penetration instrument entering different soil layers［25］
Fig. 12. Influence of parameters E and η * on the inversion results of C and φ ， respectively， where αs =101.48 kN and βs =1.87 kg/m （using the velocity curve［25］）
Fig. 13. Influence of parameters E and η * on the inversion results of C and φ ， respectively， where αs =276.92 N and βs =0.30 kg/m （using the penetration depth-initial velocity data［31］）
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Table 1. Soil parameters of Forrestal's experiments［25］
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Table 2. Soil parameters of He Xiang’s experiments［31］
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Table 3. Results of He Xiang’s penetration experiments［31］
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Table 4. Calculation results of the 27 data sets
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