机场高填土地基工后不均匀沉降指标研究

以威斯特卡德板中受荷计算刚性道面PCN值的理论为基础，考虑刚性道面接缝传荷能力和山区机场地基不均匀沉降，建立了基于“地基-道面-飞机荷载”相互作用的足尺9块板道面结构三维有限元分析模型。运用该方法，根据统计的国内主要民航运输飞机ACN值，确立了15组计算分析模型。经威斯特卡德理论和Bisar软件验证了模型的可行性。研究表明，高填土机场道面板底最大拉应力与地基不均匀沉降呈线性关系，高填土机场工程中对于1‰的地基不均匀沉降控制比较合理，对于设计强度为5.0 MPa以上的道面结构，允许地基最大不均匀沉降值为1.2‰。

Research on differential settlement index of high-filled subgrade after construction in mountainous airport

Based on the theory of Westercard to calculate rigid pavement PCN value on the middle of a slab, a 3D finite element analysis model is established for rigid airport pavement in mountainous area considering the "subgrade-pavement-aircraft loading" interaction, the slab joint loading-transfer character and the differential settlement of embankment. Applying this method, fifteen groups of computational analysis models are established, and their feasibilities are verified by Westercard theory and Bisar software according to gathered ACN values of the domestic main civil aviation freighters. Studies show that differential settlement of subgrade is in linear relationship with maximum tensile stress, a control of 1‰ differential settlement for subgrade is reasonable in high-filled airport project, for pavement with designed strength above 5.0 MPa, 1.2‰ differential settlement for subgrade is permitted.