| 基于拟动力法的抗滑桩加固边坡地震稳定性分析 |
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| 引用本文： | 饶平平,童磊磊,师昀巍.基于拟动力法的抗滑桩加固边坡地震稳定性分析[J].世界地震工程,2020,0(1):189-196. |
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| 作者姓名： | 饶平平 童磊磊 师昀巍 |
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| 作者单位： | 上海理工大学 土木工程系,上海200093;上海理工大学 土木工程系,上海200093;上海理工大学 土木工程系,上海200093 |
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| 摘 要： | 地震力作用下土质边坡动态稳定性研究对实际边坡工程有着重要的意义。采用拟动力法结合简化毕肖普法研究坡顶抗滑桩加固土质边坡在地震力作用下的动态稳定性。尽管拟静力法是目前处理地震力最为广泛的方法之一，但其局限性在于无法考虑地震力随时间变化且忽略了地震波在土体中的传播。而拟动力法采用正弦波模拟地震波在土中传播，并考虑地震波从坡脚传递到坡顶的相位差以及阻尼力对边坡稳定性的影响，通过边坡安全系数的变化揭示土质边坡在地震力作用下的稳定性变化规律。将得到的结果与拟静力法进行对比，突出了拟动力法的优势。最后，考虑水平地震加速度系数、加速度幅值放大系数以及土体内摩擦角对边坡稳定性的影响，以期对实际工程提供理论借鉴。
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| 关 键 词： | 地震力 拟动力法 简化毕肖普法 边坡稳定 抗滑桩 |
Seismic stability analysis of slopes reinforced with anti-slide piles based on pseudo-dynamic method |
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| RAO Pingping,TONG Leilei,SHI Yunwei.Seismic stability analysis of slopes reinforced with anti-slide piles based on pseudo-dynamic method[J].World Information On Earthquake Engineering,2020,0(1):189-196. |
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| Authors: | RAO Pingping TONG Leilei SHI Yunwei |
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| Affiliation: | Department of Civil Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China |
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| Abstract: | The study on the dynamic stability of soil slope under the seismic loads is of great significance for the practical slope engineering.In this paper,the pseudo-dynamic method combined with the simplified Bishop method is used to study the dynamic stability of the soil slope with the anti-slide piles subjected to earthquake loads.The pseudo-static method is one of the most widely used methods,but it ignores the change of seismic forces with time and the propagation of seismic waves in the soil.The sine wave is used in the pseudo-dynamic method to simulate the propagation of seismic waves in the soil.The method considers not only the phase differences when the waves propagate from the foot to the top in the slope but also the influence of the damping forces on the slope stability.The variation of the safety factors reveals the changing law of the slope stability under seismic forces.By comparing with the results from the pseudo-static method,the advantages of the proposed pseudo-dynamic method are highlighted.Finally,the influence of the horizontal seismic acceleration coefficient,acceleration amplitude amplification coefficient and friction angle of the soil is considered under the pseudo-dynamic method.The results may provide some theoretical references for practical engineering. |
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| Keywords: | seismic loads pseudo-dynamic method simplified Bishop method slope stability anti-slide piles |
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