摘要
对新型土工格栅与挡块式土工格栅的作用机理进行了分析,推导出了摩阻力的计算公式,在现场试验提供的数据参数的基础之上利用ABAQUS有限元软件建立了计算模型。通过模型的计算结果,对土工格栅不同位移下的拉力与位移关系、挡块拉拔阻力效果以及筋土界面摩阻力分布进行了分析,研究得出挡块式土工格栅在处理新旧路基时优势明显,在普通土工格栅与挡块式土工格栅受拉位移小于2 mm且同等路堤高度时,拉力基本相同,随着拉拔位移不断增加,挡块的作用逐渐显现,拉力随着路堤高度H的增大而增大,且拉力随着位移的增大而逐渐增大。
New mechanism of geogrid and block -faced geogrid were analyzed, the formula for calculating the friction resistance was deduced, and the calculation model was established based on the data parameters provided in the field test by using the finite element software ABAQUS. Through the model calculation results, the relationship between geogrid tension and displacement under different displacement, the elastic modulus influence, pullout resist- ance effect of the block, and the reinforced soil interface friction distribution were analyzed. The results show that block type geogrid in subgrade treatment has obvious advantages. When the displacements of ordinary geogrid and block type geogrid tensile are less than 2 mm and the height of embankment of these two kinds of geogrids equals , the tension is basically the same. With the increase of pull - out displacement, use of blocks loom large, tension in- creases with the increase the height of embankment and the displacement.
出处
《工程建设》
2017年第11期28-31,共4页
Engineering Construction
关键词
挡块式土工格栅
有限元
受拉性能
Block type geogrid
Finite element analysis
Tensile properties
