山区高速公路路基差异沉降数值分析

为了确定路基差异沉降规律,结合河北某高速公路具体工程实际,选取路基建设中有代表性的路基断面建立有限元模型,分别对横向半填半挖式、高填方及纵向填挖交界处等三种情况下的沉降状况进行了数值分析。结果表明:路基差异沉降最不利的位置出现在路基边坡处,建议道路建设过程中应重视路基边坡,特别是特殊路基填方处路基边坡的稳定性。

Numerical Analysis on Differential Settlement of Highway Subgrade in Mountainous Region

In order to determine the rules of differential settlement of subgrade, combined with a certain expressway project in Hubei Province, representative subgrade profiles are picked up to build finite element models, and numerical analysis of settlement in three different situations are conducted respectively, including horizontally half-filled-half-dug, highly-filled and longitudinal intersection. The results indicate that the most disadvantageous position of differential settlement is on the slope. It is suggested that the stability of slope, especially the ones on filled subgrade, deserves more attention.