Fig. 1. [in Chinese]

Fig. 2. [in Chinese]

Fig. 3. [in Chinese]

Fig. 4. [in Chinese]

Fig. 5. [in Chinese]

Fig. 6. [in Chinese]

Fig. 7. [in Chinese]

Fig. 8. [in Chinese]

Fig. 9. The time history of resistance in 60−90 s for the case of =0.6, U =0.7 m/s=0.6, U=0.7 m/s时阻力在60～90 s内阻力时历曲线。

Fig. 10. [in Chinese]

Fig. 11. [in Chinese]

Fig. 12. [in Chinese]

Fig. 13. [in Chinese]

Fig. 14. [in Chinese]