埋入式抗滑桩抗震性能振动台试验与数值分析

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摘要在静力作用下，已提出的有限元强度折减法在边坡支护中已经广泛运用，并取得了良好的经济效应。但在地震作用下，如何计算还需要研究。为提出合理的计算方法，进行振动台试验与数值分析。试验时输入双向汶川卧龙(NE)波，通过不断加大输入地震波的幅值，监测桩前、后土压力、坡面位移和加速度响应，研究埋入式抗滑桩在地震作用下的边坡破坏机制，最后通过提出的完全动力有限元法进行数值模拟。试验及数值模拟结果表明两者吻合较好。在地震动作用下，边坡破坏面是张拉–剪切复合破坏；有桩时比无桩时的边坡承载力大大提高，为埋入式抗滑桩抗震设计提供合理计算方法。

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	赖杰1
	郑颖人1
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	刘云3
	方玉树1
	王永甫2

关键词 ：边坡工程；振动台试验；埋入式抗滑桩；地震；破坏机制；张拉&ndash, 剪切

Abstract：Finite element strength reduction method is widely used in the support of slope under static state，which has been with good economic benefit. But under the earthquake，how to calculate needs research. As to find a reasonable method of calculation，shaking table test and numerical analysis are adopted. Bidirectional Wenchuan Wolong(NE) earthquake wave is input in the test. Through increasing the input amplitude of seismic waves，soil stress，slope displacement and acceleration response of key point before and after pile shaft are monitored；and the dynamic characteristics and failure mechanism of slope under earthquake are studied. At last，numerical simulation is conducted by complete dynamic finite element method. It is demonstrated that numerical simulation results are in accordance with experimental results. The slope failure is induced by composite effect of tension-shear under earthquake. The bearing capacity with piles for seismic resistance is boosted and this research lays a good basis for the seismic design of embedded anti-slide pile.

Key words： slope engineering shaking table test embedded anti-slide pile earthquake failure mechanism tension-shear

引用本文:

赖杰1，郑颖人1，2，刘云3，方玉树1，王永甫2. 埋入式抗滑桩抗震性能振动台试验与数值分析[J]. 岩石力学与工程学报, 2013, 32(s2): 4165-4173.
LAI Jie1，ZHENG Yingren1，2，LIU Yun3，FANG Yushu1，WANG Yongfu2. SHAKING TABLE TEST FOR ANTISEISMIC BEHAVOIR OF EMBEDDED ANTI-SLIDE PILE AND NUMERICAL SIMULATION. , 2013, 32(s2): 4165-4173.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2013/V32/Is2/4165

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