To simply evaluate the liquefaction strength and deformation of partially-improved ground.
(i) Shear stress d generated in the ground before improvement during earthquakes is computed; (ii) a shear strain i of the ground before the improvement is computed on the basis of the shear stress d; (iii) an equivalent shear stiffness Geq of the partially-improved ground after the improvement is computed; (iv) the shear strain i generated in the unimproved ground between improvement bodies in the ground after the improvement is determined; (v) the equivalent shear stiffness Geq is redetermined depending on the shear strain i; (vi) the shear strain i is determined by carrying out computations until the shear strain i is converged into a constant value, by means of the redetermined equivalent shear stiffness Geq; and (vii) an excess pore water pressure ratio u/' generated in the unimproved ground is determined according to the determined shear strain i, and the liquefaction strength of the partially-improved ground is evaluated on the basis of the excess pore water pressure ratio u/'. Additionally, (viii) an external force acting on the improved body is computed; and (ix) the deformation of the partially-improved ground is evaluated on the basis of the equivalent shear stiffness Geq and the external force.
| JPS60170688 | SOIL IMPROVING MATERIAL |
| JP4180075 | Ground injection method |
SHAMOTO YASUHIRO
HASEGAWA MASAYUKI
TAJI YOICHI
KAZAMA HIROSHI
AMARI MINORU
| JP2005105602A | 2005-04-21 | |||
| JP2002302935A | 2002-10-18 | |||
| JP2009209643A | 2009-09-17 |
Tadashi Takahashi
Takashi Watanabe
Yoshifumi Saeki