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工程科学与技术:2010,42(Z1):93-99
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地震作用下桩锚组合结构加固边坡稳定性分析----灾后重建专刊
(中国科学院成都山地灾害与环境研究所)
Stability analysis of Pile anchor composite structure reinforced slope under the earthquake loading
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投稿时间:2010-04-11    修订日期:2010-06-09
中文摘要: 对于一些性质复杂,滑坡推力巨大的边(滑)坡,单一的抗滑结构对其整治已显得无能为力,于是各种组合抗滑结构应运而生,然而目前对采用组合防治结构加固边坡稳定性的研究又十分稀缺。因此,本文以桩锚组合结构加固边坡为例,运用极限分析上限定理,推导出了地震作用下桩锚组合结构加固边坡中抗滑桩所需提供抗力的计算公式以及该加固边坡的屈服加速度计算公式,并提出了永久位移的预测方法,为地震带边坡防治结构的设计提供理论依据。通过对桩锚组合结构加固的实例边坡的计算分析,得到了在确定的锚索布置条件下,抗滑桩所需提供抗力和边坡屈服加速度与地震系数、抗滑桩布置位置、边坡特性和坡体材料特性等因素相关关系的一系列研究结果,揭示了地震作用下桩锚组合结构加固边坡的稳定性。
Abstract:Single anti-slide structure can’t assure slope stability of large thrust of landslide, so composite structure emerges as the times require. But now results about stability analysis of composite structure reinforced slope are scarce. Hence, in this paper, an example of slopes reinforced with pile and anchor composite structure was used to study the stability under the seismic loading. Calculations are conducted by applying the limit analysis upper bound method. Analytical expressions were derived that enable to readily calculate the reinforcement force of pile required to prevent failure and the yield acceleration of slopes subjected to earthquake loading. Moreover, a suitable procedure based on the assessment of earthquake-induced permanent displacement is proposed for the design of reinforced slopes in seismically active areas. From the example, we have gained several results that are presented in order to illustrate the influence of seismic forces on slope stability. The results indicated that required force kk of pile and critical acceleration kc versus slope angle β,angle of internal friction φ and distance x from pile to toe of slope etc..
文章编号:201000329     中图分类号:    文献标志码:
基金项目:国家重点基础研究发展计划
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luoyu  ly@imde.ac.cn 
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引用文本:
罗渝.地震作用下桩锚组合结构加固边坡稳定性分析----灾后重建专刊[J].工程科学与技术,2010,42(Z1):93-99.
luoyu.Stability analysis of Pile anchor composite structure reinforced slope under the earthquake loading[J].Advanced Engineering Sciences,2010,42(Z1):93-99.