机场填高作用下道槽沉降模型研究

Research on Settlement Model of Runway Trough under Airport Fill Height Influence

摘要: 本研究聚焦于机场高填方地基在道槽区施工结束后，因地基工后沉降不均引发的一系列问题，借助有限元仿真软件，建立填高作用下道槽沉降模型，研究了工后沉降对道槽结构应力分布的规律。通过有限元法，构建了不同填方高度的沉降模型，提取道槽区工后沉降数据发现，最大沉降为90 m填高的18.6 cm (自监测之日起算)。研究表明，填筑完成后沉降速度较快，高填方模型沉降量大小逐渐增加，随着时间的增加沉降值逐渐增大之后趋于稳定。这项研究对于理解机场道槽区在高填方地基下的工后沉降具有重要意义，为提高机场道面使用寿命和安全性提供了关键信息。

Abstract: This study addresses the issue of stress variations in the runway slab structure caused by uneven post-construction settlement of high-fill airport foundations in the runway area after construction. By employing the finite element method and utilizing finite element software, a two-dimensional finite element model of the runway area on a high-fill airport foundation was established. The research delves into the influence patterns of post-construction settlement on the stress distribution within the runway slab structure. Through a combination of theoretical analysis and finite element simulation, high-fill models with varying fill heights ranging from 30 m to 90 m were constructed. Analysis of the post-construction settlement data in the runway area revealed that the maximum settlement was 18.6 cm for a fill height of 90 m (calculated from the start of monitoring). The study indicates that settlement occurs rapidly after the completion of filling, with the settlement amount gradually increasing over time before stabilizing. This research holds significant importance for understanding the post-construction settlement of runway areas on high-fill airport foundations and provides critical information for enhancing the service life and safety of airport pavements.