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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Examining dynamic soil pressures and the effectiveness of different pile structures inside reinforced slopes using shaking table tests
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Examining dynamic soil pressures and the effectiveness of different pile structures inside reinforced slopes using shaking table tests

机译：使用振动台试验检查动态土压力和加筋边坡内不同桩结构的有效性

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To study the distribution and variation of dynamic soil pressures in reinforced soil slopes and the effectiveness of different stabilizing structure types, we conducted a series of shaking table tests on soil slopes reinforced by two types of stabilizing structures: constrained anti-slide pile (beam-pile) and pre-stressed anchor slab-pile walls (anchor-pile), under different shaking intensities. Through examining the recorded dynamic responses (the soil pressures and accelerations measured at different locations in model slopes) and the observed post-test behaviors in the slope models, we analyzed the distributions of response dynamic soil pressures, accelerations, spectral displacements (S-d) and the displacements and inclinations for two stabilizing structure models under different shaking intensities. We found that the frequency contents of the dynamic soil pressures change with a shift in the predominant frequency in the spectrum under high shaking intensity, and the changes in the dynamic soil pressure mainly occur on those components in some relatively low frequency bands, and we infer that these changes may mainly result from the change in the response acceleration within the reinforced slope. Finally, through comparing the spectral displacements in slopes, the measured displacements and the inclinations of pile blocks under different shaking intensities, we found that anchor piles can better support the slope than beam piles, under similar shaking conditions. These results help us better understand the features of the dynamic soil pressures and also provide evidence to select stabilizing structures for reinforcing the slope against earthquakes.
机译：为了研究加筋土坡中动态土压力的分布和变化以及不同稳定结构类型的有效性，我们对由两种类型的稳定结构加固的土质边坡进行了一系列振动台试验：受约束的抗滑桩（梁-桩）和预应力锚固平板桩墙（锚桩），其振动强度不同。通过检查记录的动力响应（在模型坡度的不同位置测量的土压力和加速度）和在边坡模型中观察到的测试后行为，我们分析了响应动力土压力，加速度，谱位移（Sd）和两个稳定结构模型在不同振动强度下的位移和倾角。我们发现，在高振动强度下，动态土压力的频率含量随频谱中主要频率的变化而变化，而动态土压力的变化主要发生在某些相对较低的频段上，我们推断这些变化可能主要是由于加固边坡内响应加速度的变化引起的。最后，通过比较不同震动强度下边坡的频谱位移，实测位移和桩块的倾斜度，我们发现在类似的震动条件下，锚固桩比梁桩能够更好地支撑斜坡。这些结果有助于我们更好地了解动态土压力的特征，并为选择加固结构来抵抗地震的斜坡提供证据。

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