6.10 Deep foundations

Fig. 1 and Photo 1 show the results of vertical loading test on foundation with different embedments D_f varying 0 to 4B.

• material : Toyoura sand D_r = 90%
• Footing : circular foundation B = 30 mm
• G-level : 60 G
• Test condition ; D_f/B = 0, 1, 2, 4

Aspect of ground below footing (Df/B=0)	Aspect of ground below footing (Df/B=4)
s = 20 mm (s/B = 0.67), General shear failure	s = 30 mm (s/B = 1), Local shear failure

Photo 1 Results of vertical loading test

Ishinabe, Morimoto, Kobayashi, Katakami and Saitoh (1997) : The effect of embedment of foundation on bearing capacity in dense sand, Proc. of 32nd Japan National Conference on Geotechnical Engineering, pp. 1405-1406 (in Japanese).