As known, the reinforcement effect of piles significantly relies on the precise assessment of cohesive soil landslide driving forces exerted on piles. However, the existing methods for estimating the cohesive soil landslide driving forces have scarcely considered the soil arching effects. Generally, this leads to prohibitively conservative approaches for pile stabilization. In this study, according to the Mohr Coulomb theory and the Ito plastic theory, a theoretical analysis method for quantitatively clarifying the distribution of cohesive soil landslide driving forces along piles is presented in detail, considering the vertical and horizontal soil arching effects between two adjacent piles in a pile row above the sliding surface. Centrifuge model test and full scale test of a pile-reinforced cohesive soil slope are introduced for verifying the proposed method, respectively. Compared with previous methods, the proposed method can prospectively produce results in better agreement with the test results. Ultimately, parametric analyses are conducted to investigate the effect of influencing parameters on the landslide driving forces, and the outcomes indicate a rational pile spacing and a small slope angle should be essentially considered for stabilizing a cohesive soil landslide effectively.

中文翻译：

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考虑土体拱形效应的粘性土体滑坡驱动力评估


众所周知，桩的加固效果在很大程度上依赖于对施加在桩上的粘性土体滑坡驱动力的精确评估。然而，现有的粘性土体滑坡驱动力估算方法几乎没有考虑土体拱起效应。通常，这会导致令人望而却步的桩稳定方法。本文根据莫尔库仑理论和伊藤塑性理论，详细介绍了一种定量阐明粘性土体滑坡驱动力沿桩分布的理论分析方法，同时考虑了滑动面上方桩排内两根相邻桩之间的竖向和水平土拱效应。分别介绍了离心机模型试验和桩加固粘性土边坡的全尺寸试验，以验证所提方法的有效性。与以前的方法相比，所提出的方法可以前瞻性地产生与测试结果更吻合的结果。最终，通过参数分析研究了影响参数对滑坡驱动力的影响，结果表明，为了有效稳定粘性土体滑坡，应基本考虑合理的桩间距和较小的坡角。