| 土工格栅与土体界面摩擦特性试验研究 |
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| 引用本文： | 杨广庆,隋传毅.土工格栅与土体界面摩擦特性试验研究[J].石家庄铁道学院学报,2010,23(2):46-52. |
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| 作者姓名： | 杨广庆 隋传毅 |
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| 作者单位： | 杨广庆(石家庄铁道大学,土木工程学院,河北,石家庄,050043;河北省交通安全与控制重点实验室,河北,石家庄,050043);隋传毅(西南交通大学,土木工程学院,四川,成都,610032) |
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| 基金项目： | 河北省自然科学基金资助项目，河北省交通运输厅资助项目 |
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| 摘 要： | 土工格栅与土体界面摩擦特性指标是加筋土结构设计的关键。基于分析土工格栅与土体的界面摩擦形式，进行了一系列室内筋土界面拉拔试验和直剪摩擦试验，测试了两种试验条件的界面摩擦特性。试验结果表明：土工格栅与砂砾料接触面抗剪强度较高，而与粘土接触面抗剪强度很低。剪切速率对两种试验方法测得的界面摩擦特性指标有不同的影响。随着法向应力的增加或剪切速率的降低，筋土界面剪应力力峰值以及其对应的剪切位移增大。土工格栅的横肋对筋土界面特性具有重要贡献。随着填料压实度的提高，土工格栅加筋效果越明显。
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| 关 键 词： | 土工格栅 界面特性 直剪试验 拉拔试验 |
Experimental Research on Interface Friction Characteristics of Geogrids and Soil |
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| Yang Guangqing,Sui Chuanyi.Experimental Research on Interface Friction Characteristics of Geogrids and Soil[J].Journal of Shijiazhuang Railway Institute,2010,23(2):46-52. |
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| Authors: | Yang Guangqing Sui Chuanyi |
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| Institution: | 1. School of Civil Engineering , Shijiazhuang Tiedao University, Shijiazhuang 050043 ,China; 2. Key Laboratory of Traffic Safety and Control of Hebei, Shijiazhuang 050043, China ; 3. School of Civil Engineering , Southwest Jiaotong University, Chengdu 610032, China;) |
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| Abstract: | Indexes of interface friction between geogrids and soil are key in design of geosynthetic reinforced soil structure. The analysis of geogrids-soil interface friction in the direct shear friction tests and pullout friction tests have been carried out. The direct shear and pullout friction tests are done of geogrids in clay and coarse gravel in laboratory. The results show that the shear strength of the interface between geogrids and the coarse gravel is high, but the shear strength of the interface between geogrids and the clay is low. The shear strain rate has different effects on the interface friction characteristics of geogrids and soil in the two friction tests. As nor- mal stress is increased, shear stress peak strength and its shear displacements are increased. The horizontal ribs contribute greatly to the interface characteristic of reinforcement soil is important. With the increased degree of compaction of fill, the interface strength increases and the reinforcement effect is more distinct. |
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| Keywords: | geogrids interface characteristics pullout test direct shear test |
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