土工格网处理填挖交界路基非均匀沉降的机理分析

Analysis of the mechanism of using geonets to treat the unequal settlement of subgrade at the cut to fill location

摘要: 研究了采用层铺土工格网处理填挖交界路基非均匀沉降的机理 ,通过非线性有限元计算分析 ,结合现场沉降观测、FWD弯沉检测 ,论证了土工格网处治填挖交界路基非均匀沉降的合理性。结果表明 ,层铺土工格网可以有效地提高填土抵抗变形能力 ,改善路基沉降的非均匀性 ,不失为一种有效解决填挖交界路基非均匀沉降的方法。

Abstract: In this paper,the mechanism of using geonets to treat unequal settlement of subgrade is analyzed.Based on observation of settlement and deflection by FWD in site, its rationality is proved by using nonlinear FEM analysis. The results show that geonets placed in layers in the soil can increase the resistance of soils to displacement and improve the nonuniformity of subgrade settlement effectively, so it is one kind of methods valid to solve the problem of unequal settlement of subgrade at the cut to fill location.