青藏铁路多年冻土区土工格室护坡试验研究  

EXPERIMENTAL STUDY ON EMBANKMENT SLOPE PROTECTION WITH GEOCELL IN PERMAFROST REGIONS OF QINGHAI—TIBET RAILWAY

作　　者：魏静[1] 许兆义[1] 包黎明[2] 葛建军[3] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]铁道部经济规划研究院,北京100038 [3]铁道第一勘察设计院,陕西西安710043

出　　处：《岩石力学与工程学报》2006年第z1期3168-3173,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：铁道部科技开发研究计划项目(2001G001-C-04-02)

摘　　要：为研究土工格室+粗颗粒柔性结构在高原冻土地段防护路堤边坡的工程效果和适用条件,在青藏铁路沱沱河地区设计并开展了土工格室护坡试验研究,研究试验包括测定土工格室填料的物理力学性能指标;测试土工格室在常温(20℃)、高温(60℃)、低温(-25℃)、循环条件(低温→高温→低温)、连续低温常温循环条件和紫外线条件下的力学特性,对土工格室冻融和抗老化性能进行了试验,并对现场测试断面的变形进行测试,试验成果表明:土工格室这种材料更耐低温,且具有较好的抗老化性能,可适用于多年冻土地区路基坡面防护,并根据试验结果给出高原冻土地段土工格室护坡处理措施应注意的要点。To study the engineering effect and applicable condition of geocell and coarse particle,a kind of flexible structure,which was used for embankment slope surface protection in permafrost regions on Qinghai—Tibet plateau,experimental project,and embankment slope surface protection with geocell,was designed and carried out in Tuotuo River regions along Qinghai-Tibet Railway.The experiments included determination of physico-mechanical index of geocell filling and testing geocell mechanical characteristics under various conditions,such as under normal temperature(20 ℃),high temperature(60 ℃),low temperature(-25 ℃),cyclic condition(low temperature→high temperature→low temperature),continuous low temperature and normal temperature cyclic condition and ultraviolet radiation condition.In the meantime,freezing and thawing characteristics and aging resistance of geocell were tested.Also,the embankment surface deformation is measured.The indoors and field test results showed that the geocell material had the characteristics of cold and aging-resistance.The geocell material could be used for embankment slope surface protection in permafrost regions.Moreover,based on the achievements of experiments,the main points for embankment slope surface protection with geocell disposal measure applied in permafrost regions on plateau were put forward.

关 键 词：边坡工程 青藏铁路 土工格室 护坡 变形 

分 类 号：P642.2[天文地球—工程地质学]