泡沫轻质土填筑桥头引道路堤的应力应变规律研究

STUDY ON STRESS AND STRAIN LAW OF BRIDGE APPROACH EMBANKMENT FILLED WITH FOAM LIGHTWEIGHT SOIL

泡沫轻质土是一种自密实的新型轻质材料,其具有较大的强度、刚度和较小的密度,用泡沫轻质土填筑桥头引道路堤可以有效减小路堤填料对桥台的水平推力,并降低桥头引道路堤的自身沉降变形;本文采用ANSYS计算分析了泡沫轻质土填筑桥头引道路堤的应力应变规律,结果表明:泡沫轻质土填筑桥头路堤时随填筑高度的增大在同一位置的水平推力会增大,小于填土路基产生的水平推力;沉降变形随填筑高度的增加而增加,但明显小于一般填土路堤,没有发生明显沉降差。

Foam light soil is a self-compacting new lightweight material with greater strength, stiffness and lower density. Filling the bridge with the foam light soil can effectively reduce the embankment filling to the abutment. Horizontal thrust and reduce the self-settling deformation of the bridgehead The stress and strain law of the bridge approach embankment filled with foam lightweight soil was calculated and analyzed using ANSYS in this paper. The results show that the horizontal thrust in the same position increases with the filling height increased, but it is smaller than the horizontal thrust generated by the soil filling embankment. The settlement deformation increases with the increase of the filling height, but it is obviously smaller than the general soil filling embankment. There is no obvious settlement difference between the abutment and he bridge approach embankment filled with foam lightweight soil.