基于初始状态参数的砂土峰值摩擦角和极限强度

doi:10.13722/j.cnki.jrme.2021.0286

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Abstract The ultimate drainage strength and the peak frictional angle of sand are significantly state-dependent and anisotropic. To form the relationships between the ultimate state of sand(i.e.，the ultimate strength and the peak frictional angle) with the initial state parameter and the rotation angle of the principal stress axis，first，the adopted state-dependent anisotropic constitutive model of sand is verified by simulating drained triaxial tests and drained hollow cylindrical torsion shear tests. Then，the relationship between the peak friction angle and the initial state parameter under drained triaxial compression conditions is obtained based on the results of the constitutive simulations. By adopting the drained triaxial loading path，a simplified formula for calculating the ultimate strength under drained triaxial conditions is established. Furthermore，drained hollow cylinder torsional shear tests under uniform internal and external pressures are simulated and the relationship between the peak friction angle and the rotation angle of the principal stress axis is obtained. By employing the drained torsional shear path，a simplified calculation method of the ultimate drainage strength，considering the rotation of the principal stress axis，is established. The effectiveness of the simplified method is verified by comparing the ultimate drainage strengths from the simplified method，experiments and simulations under drained triaxial and torsional shear conditions.

Key words： soil mechanics sand initial state parameter ultimate drainage strength peak frictional angle rotation of principal stress axis simplified method

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	Articles by authors
	TONG Senjie1
	2
	HUANG Maosong1
	2
	SHI Zhenhao1
	2
	CHEN Zhouquan3

Cite this article:

TONG Senjie1,2,HUANG Maosong1, et al. Peak frictional angle and ultimate drainage strength of sand based on initial state parameter#br#[J]. , 2022, 41(2): 389-398.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0286 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I2/389

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