Post-failure mobility of saturated sands in undrained load-controlled ring shear tests
Post-failure mobility of saturated sands in undrained load-controlled ring shear tests
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DOI：
10.1139/t02-032
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发表时间：
2002-08
影响因子：
3.6
通讯作者：
Gong-hui Wang;K. Sassa
中科院分区：
文献类型：
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作者：
Gong-hui Wang;K. Sassa
土的不排水剪切特性随剪切位移的发展是理解长行程液化边坡破坏的基础。本文利用新研制的环剪试验装置，对粉质砂土进行了一系列环剪试验，研究了长剪切位移作用下砂土的不排水特性。根据试验结果，讨论了不同密度范围内砂土的不排水剪切特性。在松散、中等和致密砂土上的所有试验中，在稳定状态下都观察到与液化相对应的非常低的有效应力。通过对不同初应力状态的试件进行试验，并在每种初应力状态下对同一试件进行三次反复剪切试验，考察了应力状态和剪切历史对不排水剪切行为的影响。不同初应力状态下的试验证明，初应力状态对静力液化抗力有影响，但对静力液化抗力没有影响。
The undrained shear behavior of soils with progress of shear displacement is essential to the understanding of liquefied slope failures with long travel distance. In this paper, using a newly developed ring shear apparatus, a series of ring-shear tests were conducted on a silty sand to examine the undrained behavior of sand subjected to long shear displacement. Based on the test results, the undrained shear behavior of sands with a wide range of densities is discussed. A very low effective stress corresponding to liquefaction was observed at the steady state in all of the tests on loose, medium, as well as dense sand. The effects of stress state and shear history on the undrained shear behavior were examined by performing tests on a sample with different initial stress states and shearing the same specimen repeatedly (three times) at each initial stress state. The tests at different initial stress states proved that the initial stress state has an influence on static liquefaction resistance but has no eff...