基于极限平衡法的机场高填方边坡稳定性分析研究

发布时间：2018-10-21 12:43

【摘要】：随着民用航空事业的快速发展,越来越多的机场"上山"修建,从而产生了大量挖方及填方边坡.这些边坡地质条件复杂、高度大、形成时间短,其稳定性严重制约和影响到机场的设计、施工和运营.对不同极限平衡法在机场高填方边坡稳定性中的应用进行了对比分析,采用一般条分法、简化毕肖普法、简布法、摩根斯坦~普赖斯法分别对华北地区某机场黄土高填边坡正常条件和地震作用两类工况三种含水量状态下的稳定性进行了分析.结果表明,水对边坡稳定性影响比较大,在边坡设计过程中对于地基土和填筑体选用合适含水量状态下的抗剪强度参数和做好边坡排水设施至关重要;不同的计算方法,稳定系数计算结果不同,简化毕肖普法和摩根斯坦~普赖斯法的计算结果比较接近、一般条分法和简布法计算结果比较接近,而前面两种方法比后两种方法稳定性系数平均大7%左右.
[Abstract]:With the rapid development of civil aviation, more and more airports are built up the mountain, which results in a large number of excavations and fill slopes. The geological conditions of these slopes are complex, the height is large, the forming time is short, and the stability of these slopes seriously restricts and affects the design, construction and operation of the airport. The application of different limit equilibrium methods to the stability of airport high fill slope is compared and analyzed. The general strip method is used to simplify Bishop's method and simple layout method. The stability of loess high fill slope of an airport in North China under normal conditions and three kinds of water contents under seismic action is analyzed by using Morgenstein-Price method. The results show that water has a great influence on slope stability, and it is very important for the selection of shear strength parameters under the condition of proper water content in the design process of the slope, and for the different calculation methods. The calculation results of the stability coefficient are different. The results of simplified Bishop method and Morgenstein-Price method are close, and the results of general slice method and brief method are close. The stability coefficient of the former two methods is about 7% higher than that of the latter.
【作者单位】：中国民航机场建设集团公司西北分公司;河北工业大学土木工程学院;长安大学公路学院;
【基金】：国家自然科学基金(41272285)
【分类号】：U416.14

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