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首页> 外文期刊>Transactions of Tianjin University >Vane Shear Strength Based Stability Analysis of Slopes in Unconsolidated Soft Clay
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Vane Shear Strength Based Stability Analysis of Slopes in Unconsolidated Soft Clay

机译：基于叶片抗剪强度的软土地基边坡稳定性分析

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摘要

In-situ vane shear test is frequently performed to determine shear strength for slope stability analysis in Tianjin New Harbor. However, the soil shear strength varies with the shear plane orientation. A possible means to reduce the effect of directional dependency of shear strength is to convert the in-situ vane shear strength into undrained shear strength parameters. A method of converting in-situ vane shear strength into undrained shear strength parameters is presented. The shear strength parameters determined for all of the in-situ vane shear strengths are subjected to statistical regression analysis to take into consideration the possible effect of non-homogeneity in the soft clay deposit. Using the regressed shear strength parameters, slope stability analyses are performed for five existing soil slopes. The results of stability analyses indicate that the safety factors obtained from the converted parameters reflect the state of the slopes analyzed much better than those obtained from in-situ vane shear strength and laboratory consolidated-undrained and unconsolidated-undrained strength parameters. It is concluded that the presented methsod of determining undrained shear strength parameters for in-situ vane shear strength is effective.
机译：天津新港经常进行原位叶片剪切试验来确定剪切强度，以进行边坡稳定性分析。但是，土壤抗剪强度随剪切面的方向而变化。减小抗剪强度的方向相关性影响的一种可能方法是将原位叶片抗剪强度转换为不排水的抗剪强度参数。提出了一种将原位叶片抗剪强度转换为不排水抗剪强度参数的方法。对所有原位叶片抗剪强度确定的抗剪强度参数进行统计回归分析，以考虑软粘土沉积物中非均质性的可能影响。使用回归抗剪强度参数，对五个现有土质边坡进行了边坡稳定性分析。稳定性分析的结果表明，从转换参数获得的安全系数反映了所分析斜坡的状态，比从原位叶片抗剪强度和实验室固结不排水和未固结不排水强度参数获得的安全系数更好。结论是，提出的确定原位叶片抗剪强度的不排水抗剪强度参数的方法是有效的。

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