临河岩质边坡抗倾覆稳定性拟动力分析
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作者单位:

1.河海大学 地球科学与工程学院;2.河海大学岩土力学与堤坝工程教育部重点实验室

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[P642.3]

基金项目:

中央高校科研业务费专项资金资助 (2109B42214),国家自然科学基金(41674113)


Pseudo-dynamic analysis of anti-overturning stability of along reiver rock slope
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Affiliation:

1.School of Earth Science and Engineering,Hohai University;2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University

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    摘要:

    地震多发地区临河岩质边坡的稳定性分析具有重要意义,在考虑水平与竖向地震力、张裂缝积水深度、坡顶超载、锚固效应、流水淘蚀、岩体放大系数及静水与动水压力等的条件下,运用拟动力方法推导了不同工况条件下临河岩质边坡抗倾覆地震安全系数计算公式。研究表明,水平地震力、张裂缝积水、流水淘蚀等不利于岩质边坡抗滑倾覆稳定;但竖向地震力、坡顶超载、锚固力、锚固位置等有利于岩质边坡抗倾覆稳定;随着岩体放大系数的增加,水平地震力、坡顶超载对岩质边坡抗倾覆稳定性的影响增大,竖向地震力、张裂缝积水深度对岩质边坡抗倾覆稳定性的影响减小,而锚固效应、坡脚淘蚀高度、临河水位对边坡抗倾覆稳定性的影响基本不变。

    Abstract:

    For the rock slope near the river in the earthquake-prone area,the stability analysis is of great significance. In this paper, by comprehensively considering the effect of horizontal and vertical seismic forces, the depth of water accumulated in the tensile cracks, the overload of the slope top, the anchoring effect, the erosion of flowing water, the magnification factor of rock mass, and the static and dynamic water pressure, the pseudo-dynamic method was used to derive the calculation formula of the anti-overturning seismic safety factor of the river-near rock slope under different working conditions. The result showed that horizontal seismic forces, accumulated water in tensile cracks, and water erosion had an adverse effect on the anti-sliding and overturning stability of rock slopes; however, vertical seismic forces, slope top overload, anchoring force, and anchoring positions were conducive to rock slope resistance of overturning stability. With the increase of the rock mass magnification factor, the influence of horizontal seismic force and slope top overload increased, while the effect of vertical seismic force and the depth of water accumulation in tensile decreased. However, the influence of anchoring effect, scouring height of slope toe, and river water level on slope anti-overturning stability was basically unchanged.

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吴孙星,孙树林,杨兵兵,等. 临河岩质边坡抗倾覆稳定性拟动力分析[J]. 科学技术与工程, , ():

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  • 收稿日期:2020-11-26
  • 最后修改日期:2021-04-06
  • 录用日期:2021-04-08
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