在公路改扩建工程的建设中，土工格栅(格室)加筋路堤已被广泛用作控制路基稳定性的措施，然而，它被用于控制新老路基的差异沉降时，存在加固机理不清、计算方法不合理等问题。为了解决这些存在的问题，本文通过室内模型试验，对比有无格栅和不同层位格栅时不同地基差异沉降模式下路基内部的应力及变形规律，分析路基差异沉降受土工格栅的作用效果，得出土工格栅铺设在路基中的最优层位。
In the construction of highway reconstruction and expansion projects, geogrid (grid room) has been widely used as a measure to control roadbed stability, but there still have been many controversies regarding its use in controlling the differential settlement between old and new roadbeds. In order to solve this problem, the model test was conducted to investigate the stresses and deformations in subgrade. The various locations of geogrid, subgrade with or without geogrid were compared to evaluate the reinforcement effect of geogrids, and the optimal location was recommended.
