A type of triaxial apparatus equipped with a micro porous membrane at the pedestal, together with a pair of bender elements (BE) at both ends of the specimen has been newly developed for measuring the elastic shear modulus,
G of soil specimen with the suction,
s, as well as the mean net stress,
pnet. A series of triaxial BE test on Toyoura sand was carried out. The effects of suction and mean net stress on the
G-value are manifested in a manner that the relationship of normalized shear modulus ,
G/ (
e) (n.b.,
(
e) : void ratio function) against (
pnet+
s) or (σ
v,net +
s)・(σ
h,net +
s) is unaffected by the magnitudes of suction.
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