摘要
土工格栅加筋作用机理复杂,测试难度大,结合土工格栅加筋陡坡路堤工程,开展了现场变形监测,并针对土工格栅特点,用非线性有限元方法进行了数值计算。试验和计算分析表明:铺设土工格栅能有效地限制路堤沉降与坡脚水平位移,保证路堤的稳定性。数值计算结果与现场监测结果吻合较好,据此分析了土工格栅长度、弹性模量及铺设间距与路堤变形的关系,土工格栅弹性模量越大,加筋效果越好。有效而经济的土工格栅长度是6.5 m,铺设间距是0.6 m。
Because of the complicated reinforced mechanism and experimental measure, combining with the reinforced steep slope of embankment engineering, the field test of deformation monitoring has been carried out. In light of the properties of geogrids, numerical calculation is done by nonlinear finite element method. The results from experiment and calculation show that the settlement and horizontal displacement of the embankment laid by geogrids can be reduced and limited at large extent. Therefore, the embankment stability is pledged. The calculated results are consistent with the field measured data. Some factors influencing upon the deformation, including the length,elastic modulus and interval of geogrids, are analyzed. The larger the modulus is, the better the results is. The geogrids with length of 6.5 m and interval of 0.6 m are economical and effective.
出处
《岩土力学》
EI
CSCD
北大核心
2008年第4期925-930,936,共7页
Rock and Soil Mechanics
基金
交通部西部交通建设科技项目资助(No.200131878528)
关键词
陡坡路堤
土工格栅
有限元
试验测试
水平位移与沉降
embankment of steep slope
geogrids
finite element method
experimental test
horizontal displacement and settlement
