| 地震作用下坡高和坡率对黄土高边坡稳定性的影响研究 |
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| 引用本文： | 王军,马学宁.地震作用下坡高和坡率对黄土高边坡稳定性的影响研究[J].路基工程,2018,0(4):109-113. |
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| 作者姓名： | 王军 马学宁 |
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| 作者单位： | 兰州交通大学土木工程学院, 兰州 730070 |
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| 摘 要： | 以兰州南坡坪地区多级高边坡工程为依托，建立边坡有限元模型，模拟分析边坡的抗震性，研究在地震作用下坡高和坡率对黄土高边坡稳定性的影响。结果表明:单级坡高取8 m，坡率1∶0.50的安全系数为1.06，坡率1∶0.75的安全系数为1.18，坡率1∶1.00的安全系数1.27，边坡坡率越大，边坡抗震稳定性越差。边坡开挖坡率一定，在第五~第七级坡高均取8 m的工况下，边坡安全系数为1.18，边坡支护可取得比较好的抗震效果，并结合不同坡高和坡率下，黄土高边坡的土方开挖量和支护面积，讨论了边坡开挖的经济性。
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| 关 键 词： | 抗震性 数值模拟 边坡支护 安全系数 稳定性 |
| 收稿时间： | 2019-11-11 |
Study on Influence of Slope Height and Slope Ratio on Stability of Loess High Slope under Earthquake Action |
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| Abstract: | Based on the multi-stage high slope engineering in Nanpoping area of Lanzhou, the finite element model of slope is established, the aseismicity of the slop is simulated and analyzed and the effect of slope height and slope ratio on the stability of loess high slope under earthquake action is studied. The results show:Single-level slope height takes 8 m, the safety factor of slope ratio 1:0.50 is 1.06, the safety factor of slope ratio 1:0.75 is 1.18, the safety factor of slope ratio 1:100 is 1.27, the greater the slope ratio, the worse the antiseismic stability of the slope. If the slope excavation ratio is certain and the five~seven-level slope height take 8 m, the slope safety factor is 1.18 and the slope support can get better antiseismic effect. According to the excavation amount and supporting area of loess high slope with different slope height and slope ratio, the economical efficiency of slope excavation is discussed. |
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