基于ABAQUS的倾斜微型桩护坡承载特性研究
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ABAQUS-based Study on the Bearing Characteristics of Inclined Mini-pile Slope Protection
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    摘要:

    为了充分研究倾斜微型桩的护坡受力承载特性、荷载传递规律、不同参数变量与边坡稳定性系数间的关系,利用数值计算方法ABAQUS软件建立多种模型进行分析。结果表明:倾斜微型桩桩身分布形态近似呈“S”形分布,在桩体埋深1/2位置处弯矩值最大,弯矩沿着桩身两侧分布,受荷段与锚固段弯矩明显;桩后土压力呈钟形分布,随着桩体埋深的增加,土压力先增大后减小,在滑面附近土压力达到最大值;在距离边坡底部3 m处即1/3边坡位置时,边坡稳定性系数达到最大值,因此为使微型桩发挥更有效的护坡承载效果,微型桩应设置于距坡角1/3~1/2位置处;随着微型桩倾斜角度的增加,稳定性系数先增大后减小,在倾斜角度为40°即与坡面近乎垂直时达最大值1.449,倾斜桩体能更好地增强边坡的整体稳定性;随着桩间距的增大边坡稳定性系数逐渐减小,随着桩排数的增加稳定性系数近似直线型增加,在同等条件状况下,增加桩排数能显著增加边坡稳定性,达到快速加固边坡的效果。

    Abstract:

    In?order?to?fully?study?the?slope?bearing?characteristics?of?inclined?mini-pile,?load?transfer?law,?the?relationship?between?different?parameter?variables?and?slope?stability?coefficient,?various?models?were?established?and?analyzed?by?using?numerical?calculation?method?ABAQUS?software.?The?results?show?that?the?distribution?of?inclined? mini-pile?is?approximately?"S"?shaped?distribution,?the?bending?moment?value?is?the?largest?at?the?position?of?1/2?of?the?pile?body?burial?depth,?the?bending?moment?is?distributed?along?both?sides?of?the?pile?body,?and?the?bending? moment?of?the?loaded?section?and?the?anchored?section?is?obvious,?the?soil?pressure?behind?the?pile?is?bell-shaped? distribution,?with?the?increase?of?the?pile?body?burial?depth,?the?soil?pressure?increases?first?and?then?decreases,?and?the?soil?pressure?value?reaches?the?maximum?near?the?slip?surface.?The?stability?coefficient?of?the?slope? reaches?the?maximum?at?3 m?from?the?bottom?of?the?slope,?i.e.?1/3?of?the?slope,?so?in?order?to?make?the?mini-pile?play?a?more effective?slope?protection?effect,?the?mini-pile?should?be?set?at?1/3?to?1/2?of?the?slope?angle,with?the?increase?of?the?tilt?angle?of?the?mini-pile,?the?stability?coefficient?increases?first?and?then?decreases,?reaching?the?maximum?at?the? tilt?angle?of?40 °,?i.e.?nearly? perpendicular?to?the?slope1.449,?the?inclined?pile?body?can?better?enhance?the?overall?stability?of?the?slope,?with?the?increase?of ?the?pile?spacing?slope?stability?coefficient?gradually?decreases,?with?the?increase?of?the?number?of?pile?rows?stability?coefficient? nearly?linear?increase,?under?the?same?conditions,?increase?the?number?of?pile?rows?can?significantly?increase?the?stability?of?the? slope,?to?achieve?the?effect?of?rapid?reinforcement?of?the?slope.

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陈国军,毛少霞,张雪云,任凯.基于ABAQUS的倾斜微型桩护坡承载特性研究[J].科技与产业,2023,23(19):145-150

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  • 在线发布日期: 2023-10-20
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