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不同土工合成材料下新型加筋土界面特性
doi: 10.13204/j.gyjz201508019
INTERFACE PROPERTIES OF A NEW TYPE REINFORCED SOIL WITH DIFFERENT GEOSYNTHETIC MATERIALS
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摘要: 土工合成材料对加筋土结构的界面直剪特性具有重要的影响。通过一系列大型直剪试验对不同筋材下的Sandwich型加筋土筋土界面的直剪特性进行研究,研究不同竖向应力下不同种类加筋材料对Sandwich型加筋土界面直剪特性的影响。试验结果表明:土工格栅的加筋效果最佳,两种格栅的加筋界面抗剪强度明显高于土工织物;随着竖向应力的增加,筋土界面抗剪强度提高。结合理论分析,对不同的土工格栅进行直剪试验,得出土工格栅横、纵肋对界面剪切强度的提高值分别为15.3%和4.1%。Abstract: The influence of the geosynthetic materials on the reinforced soil interface properties is important． A series of large direct shear tests with different geosynthetic materials under different normal stress were done for this new reinforced soil． Test results indicate that the shear strength of the interface with geogrids was significantly higher than that of the interface with geotextiles，the interface shear strength was developed with the increase of the vertical stress． Combined with theory analysis，the direct shear test of different geogrids showed that horizontal and longitudinal ribs of the geogrids made the interface shear strength be increased by about 15. 3% and 4. 1% respectively．
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