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基于改性直剪试验的裂隙土抗剪强度参数相关性

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摘要

裂隙土是一种关于由斜坡表面的裂缝而导致滑坡的理论。目前已经有一些针对裂隙土的剪切参数的研究。其中, 最新研究是关于软硬稠度条件下裂隙土的物理和抗剪强度参数的相关性。该研究中的土壤条件不太能代表非常硬的斜坡土壤 稠度。因此,对中等至极高稠度进行了进一步研究。在相同的总压力和不同的水压下,使用改进的直剪试验对裂隙土壤试样 进行试验。结果表明,水压对裂隙土没有显著影响。因此,对其他裂隙土样进行了无水压直剪试验,以了解土的剪切参数相 关性。在裂隙土壤中,粘聚力丧失,摩擦角不受土壤孔隙比的影响。中等至非常高稠度下裂隙土壤剪切参数相关性的经验公 式适用于 LL < 50%的情况;Φ = 22°且 LL ≥ 50%,φ = -0.0024 LL2 + 0.2062 LL + 17.514。

关键词

裂隙土;改性直剪;抗剪强度参数

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参考

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