浙东南海相沉积土各向异性参数测定

通过对浙东南地区原状黏性土样按沉积面三种不同倾角切土样,进行常规三轴固结排水剪切试验,得到该黏土在三维应力状态下应力应变变化规律,及横观各向同性土层的力学参数。试验结果表明:该黏土具有各向异性特征,0°方向切土得到初始切线模量最大,90°方向次之,45°方向最小且试样沿着该沉积面发生剪切滑移。

Test on Transversely Isotropy Parameters of Natural Marine Deposits Clay in Southeast Zhejiang

The parameters of transversely isotropic clay are obtained from the conventional consolidated drained triaxial compression tests. The natural marine deposits clay specimens are cut at three inclinations （ i. e. 0° ,45° , 90°） , and a series of isotropic consolidated drained triaxial compression tests has been conducted. The relation of the stress and strain is found by the 3-D consolidated drained tests. The triaxial tests results of clay indicate that natural marine deposits clay in Zhejiang province is basically anisotropic soil. They also show that Initial tangent modulus is the best great in the direction of the 0°, is second place in the direction of 90°. The specimens failure surface extend along the deposit plane when the deposit clay specimens are cut at the direction of 45°.