土工格栅加筋红砂岩大三轴试验研究  

The large-scale triaxial tests on red sandstone soil reinforced with geogrids

作　　者：许桂林[1] 黄向京[1,2] 杨果林[1] 刘哲哲[1] 

机构地区：[1]中南大学土建院,湖南长沙410075 [2]湖南省交通规划勘察设计院,湖南长沙410008

出　　处：《公路工程》2010年第2期10-13,27,共5页Highway Engineering

基　　金：湖南省交通厅科技厅项目(200612)

摘　　要：在大型三轴仪上进行了不同含水量情况下红砂岩素土样和不同加筋方式土工格栅加筋土的三轴不固结不排水剪切试验,保证93%的压实度,从而探讨了土工格栅加筋红砂岩的力学特性及变形特性,分析了土工格栅的加筋机理,为红砂岩路基,特别是加筋红砂岩路基提供设计和施工依据。试验结果表明:素土和加筋红砂岩土样的强度均与含水量密切相关。其抗剪强度指标随含水量的变化规律大致相同。On the large-scale triaxial test equipment,the triaxial unconsolidated undrained tests of geogrid reinforced earth and non-reinforced soil at different water contents and different reinforcing methods were carried out,when the degree of compaction of soil sample was 93%.In this paper,characteristic of strength and deformation of geogrid reinforced red sandstone soil were studied,and reinforcement mechanism of geogrids was analyzed.The scientific basis for design and construction of red sandstone roadbed,especially reinforced red sandstone roadbed,was provided.Results also showed that the strength of reinforced red sandstone soil and non-reinforced soil is closely related to the water content.It can be easily found that the variation laws of the cohesion and the angle of internal friction of red sandstone soil with the water content are approximately same.

关 键 词：红砂岩 土工格栅 加筋土 大三轴试验 抗剪强度 

分 类 号：U416.03[交通运输工程—道路与铁道工程]