摘要
结合邵怀高速公路溆浦连接线半填半挖路基的实际情况,应用有限元软件,采用Drucker-Prager弹塑性模型及四节点Goodman摩擦单元,对加筋切填路基变形影响因素的敏感性进行了模拟试验;通过定义敏感性因子对试验结果进行了分析,并对各影响因素敏感性进行了排序.结果表明:对路堤顶面沉降影响因素敏感性排序前3位的依次为地基强度、路堤高度和加土工格室;对坡脚底部侧向位移影响因素敏感性排序前3位的依次为地基强度、加土工格室和路堤高度.试验显示了加筋切填路基的真实工作状态,结果可为同类型的后续研究和工程实践提供参考.
On the basis of the Xupu connecting line of Shao-Huai Expressway and with the help of finite element program,the Drucker-Prager theory of elastoplastic model and four-node Goodman friction element was used.Simulation tests were done for reinforced cut and fill sub-grade distortion factors sensitivity analysis.By defining the sensitivity factor and analyzing the test results,the sensitivity was sorted out.The result has shown that,for the sensitivity priority of each factor to stability of reinforced cut and fill sub-grad,the top three factors for the settlement of subgrade are foundation strength,embankment height and geocell,and the top three factors for the lateral displacement of subgrade are foundation strength,geocell and embankment height.This experiment has revealed the real work condition of the reinforced cut and fill sub-grade,and the results shown here have given a good reference for the succeeding research and similar engineering practice.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第3期12-16,共5页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51078136)
湖南省自然科学基金资助项目(09JJ3113)
湖南省交通厅科技项目(200717)
关键词
加筋切填路基
土工合成材料
模拟试验
敏感性分析
the reinforced cut and fill sub-grade
geosynthetics
simulation test
sensitivity analysis
