改扩建公路路基沉降规律研究

摘要

结合工程实例对改扩建公路路基沉降规律进行研究，并利用双曲线法对路基沉降量进行预测。结果表明，路基的加宽宽度不宜大于10 m；新旧路基的差异沉降量随着路基扩宽宽度的增加而缓慢增加；改扩建公路路基的沉降量随着填土高度的增加而增加但不是正比关系；双曲线法可有效预测改扩建路基沉降量。%Based on the engineering examples,the settlement law of the highway subgrade is studied in the paper,and the hyperbolic method is used to predict the settlement of the roadbed.The results show that:the roadbed width should be less than 10m;with the increase of the width of widening subgrade,the differential settlement of the new and old subgrade increases;the settlement of highway subgrade increases with the increase of the soil filling height,while it is not proportional to the settle-ment;the hyperbola method can effectively pre-measure the expansion subgrade settlement.