山区机场高填方地基沉降变形及稳定性分析

Settlement Deformation and Stability Analysis of High Fill Foundation in Mountainous Airport

针对山区机场高填方地基存在变形与稳定性问题,通过结合有限元软件对高填方地基的地质条件、沉降变形计算和稳定性评价等进行了分析,得出了山区机场高填方地基沉降变形和稳定性的关键影响因素,并提出了相应的工程对策。结果表明:强夯处理可显著减小原地基沉降变形,各分层顶面位移出现回弹现象。考虑含石量UH模型计算的位移和应变,得出其主要破坏形式为近似的圆弧滑动破坏,安全稳定性系数与填筑高度呈现负相关。通过强夯处理土层,采取优化设计方案,加强排水设施,对边坡进行加固等措施,可有效控制山区机场高填方地基的沉降变形,提高其稳定性,确保机场的安全运行。所提出的工程对策和建议对类似山区机场建设具有一定的参考价值。

There are deformation and stability problems in the high fill foundation of the airport in the mountainous area.By combining the finite element software,the geological conditions,settlement deformation calculation and stability evaluation of the high fill foundation are analyzed.The key influencing factors of the settlement deformation and stability of the high fill foundation of the airport in the mountainous areas are obtained,and the corresponding engineering countermeasures are put forward.The results show that the dynamic compaction treatment can significantly reduce the settlement deformation of the original foundation,and the top displacement of each layer appears rebound phenomenon.Considering the displacement and strain calculated by the stone content UH model,it is concluded that the main failure form is the approximate circular sliding failure,and the safety stability coefficient is negatively correlated with the filling height.By means of dynamic compaction of soil layer,optimizing design scheme,strengthening drainage facilities and reinforcing slope,the settlement deformation of high fill foundation of mountainous airport can be effectively controlled;its stability can be improved,and the safe operation of airport can be ensured.The engineering countermeasures and suggestions proposed in this paper have certain reference value for the construction of similar mountainous airports.