| 高陡堆积体滑坡半坡桩无效锚固深度分析 |
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| 引用本文： | 上官力,马显春,肖洋.高陡堆积体滑坡半坡桩无效锚固深度分析[J].中国地质灾害与防治学报,2019,30(4):69-75. |
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| 作者姓名： | 上官力 马显春 肖洋 |
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| 作者单位： | 中铁西南科学研究院有限公司 |
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| 基金项目： | 中铁科学研究院技术开发研究专项资金资助项目(2015-KJ031-Z031-02) |
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| 摘 要： | 半坡桩与普通抗滑桩的受力机制不同,用常规的设计方法半坡桩的锚固深度不足,可能导致治理工程失效。为了分析半坡桩无效锚固深度,在分析高陡堆积体滑坡特点的基础上,根据抗滑桩受力机制重新厘定了半坡桩的概念;以弹性半坡桩为例,用数值分析方法重点研究了弹性半坡桩无效锚固深度与总的锚固深度、滑面倾角及滑坡推力的关系。结果表明,弹性半坡桩的无效锚固深度受总的锚固深度影响较小,当总的锚固深度增加时,无效锚固深度在小范围内波动;弹性半坡桩的无效锚固深度与滑面倾角及滑坡推力呈指数正相关性,随着滑面倾角及滑坡推力的增加,无效锚固深度也在增加。
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| 关 键 词： | 高陡堆积体滑坡 数值分析 桩土相互作用 半坡桩 无效锚固段 |
Analysis on the invalid anchorage depth of hemi-slope anti-slide pile in high and steep colluvium landslide |
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| SHANGGUAN Li,MA Xianchun,XIAO Yang.Analysis on the invalid anchorage depth of hemi-slope anti-slide pile in high and steep colluvium landslide[J].The Chinese Journal of Geological Hazard and Control,2019,30(4):69-75. |
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| Authors: | SHANGGUAN Li MA Xianchun XIAO Yang |
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| Institution: | (China Railway Southwest Research Institute CO.,LTD,Chengdu,Sichuan610031,China) |
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| Abstract: | The stress mechanism of hemi-slope anti-slide pile is different from that of ordinary anti-slide pile.The lack of anchorage depth of hemi-slope anti-slide pile with conventional design method may lead to the failure of treatment engineering.In order to study invalid anchorage depth analysis of hemi-slope anti-slide pile,on one hand,the concept of hemi-slope anti-slide pile was redefined based on the analysis of the characteristics of high dipping deposit landslide.On the other hand,taking elastic hemi-slope anti-slide pile as an example,the relationship between the ineffective anchorage depth of elastic hemi-slope anti-slide pile and the total anchorage depth,slope angle and landslide thrust was emphatically studied by numerical analysis methods.The study results show that the ineffective anchoring depth was less affected by the total anchoring depth.The increase of total anchoring depth will induce a small fluctuating range of ineffective anchoring depth.Moreover,the ineffective anchorage depth of elastic hemi-slope anti-slide pile had an exponential positive correlation with the inclination angle of slip surface and landslide thrust that with the increase of the inclination angle of sliding surface and the thrust of landslide,the ineffective anchorage depth also increased. |
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| Keywords: | high dipping deposit landslide numerical analysis pile-soil interaction hemi-slope anti-slide pile invalid anchoring depth |
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