摘要
不同填料级配对筋土界面特性的影响直接关系到工程的稳定性.通过室内大型直剪试验,研究了颗粒级配、密实度、筋材种类等对于界面强度的影响,深入了解筋土界面抗剪强度以及界面剪胀特性.试验结果表明,粗颗粒和细颗粒土分别与筋材的界面强度要明显大于级配较好的标准砂与筋材的界面强度.密实砂土界面强度具有类似混凝土材料强度高韧性低脆性破坏的特性.对于土工格栅,粗颗粒砂粒由于粒径较大达到峰值强度需要较大的剪切位移.
The effects of different fillers gradation on reinforced soil interface properties would affect the stability of the engineering. This paper has studied the grain composition, compaction, reinforcement type effect on the interface strength, and researched the shear strength and interfacial shear dilatancy characteristics of reinforced soil through lab large-scale direct shear test. The test results show that the interface strength, coarse and fine grain soil and reinforced material is obviously higher than the standard sand well graded. The interface strength of dense sand properties is similar to concrete material with high strength and low brittleness damage. The geo-grid, coarse sand reached peak intensity which need larger shear displacement due to the larger particle size.
出处
《江西理工大学学报》
CAS
2014年第1期29-33,45,共6页
Journal of Jiangxi University of Science and Technology
基金
国家自然科学基金资助项目(51104068)
江西省教育厅科技项目(GJJ13406)
江西省科技支撑计划项目(20132BBG70106)
关键词
填料级配
筋土界面
抗剪强度
fillers gradation
reinforced soil interface
shear strength
