陡坡地段路基差异沉降影响因素及控制措施研究

Study on the Influencing Factors and Control Measures of Deferential Settlement of Steep Slope Subgrade

以实际工程为背景,基于正交试验方法对山区陡坡路基沉降数据进行方差分析。结果表明,各影响因素对陡坡路基差异性沉降的影响程度依次为:填土高度>斜坡坡度>地基土性质;进一步通过回归方程和响应曲面图,定量直观地揭示了3个因素对路基差异沉降的影响规律。再利用FLAC3D模拟陡坡路基铺设土工格栅和未铺设时的沉降情况,结果表明,铺设土工格栅后差异沉降值较未铺设时减小了33%,表明铺设土工格栅能有效减小陡坡路基差异沉降。

Based on the real project,variance analysis was used for analyzing the deferential settlement data of steep slope subgrade using the orthogonal experimental design. The results demonstrate thatthe influence degree follows by： depth of tillgradient of slopesoll property. Then, based on the regression equation and the response surface plot, the effect of three factors on settlement of steepslope subgrade was revealed directly. Finally, FLAC3D was used to simulate the deferential settle-ment of steep slope subgrade with a.ying and not laying the geotechnical g r i le . The results show that the deferential settlement of steep slope subgrade was reduced by 3 3 % after laying thegeotechnical grile,which indicates that a.ying the geotechnical grille is able to effectively reduce the deferentialsettlement of steep slope subgrade.