| 摘要: |
| 基于单调直剪试验，研究了竖向应力、剪切速率对非水反应类高聚物土工布界面及高聚物砂土界面的剪切应力、剪切位移、抗剪强度和剪切模量等剪切特性的影响.结果表明：在给定竖向应力和剪切速率下，随着剪切位移的增加，高聚物土工布界面、高聚物砂土界面均表现出剪切软化的特性；竖向应力对高聚物土工布界面抗剪强度及剪切模量的影响显著，在剪切速率v=2mm/min下，随着竖向应力由50kPa增加至150kPa，高聚物土工布界面的抗剪强度由15kPa增至46kPa；在给定竖向应力下，剪切速率v=1~3mm/min时，剪切速率对高聚物土工布界面的抗剪强度以及高聚物砂土界面的抗剪强度和剪切模量的影响均较小. |
| 关键词: 直剪试验 高聚物 界面特性 抗剪强度 剪切模量 |
| DOI：103969/j.issn.1007 9629202101016 |
| 分类号: |
| 基金项目:国家重点研发计划项目(2019YFC1510803 2)；河南省高等学校重点科研项目(20A560021)；河南省重大科技专项目（181100310400)；国家自然科学基金资助项目(51679219)；中国博士后面上项目(2019M610461) |
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| Interfacial Shear Properties of Non water Reacted Polymer and Geomaterials |
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WANG Yuke1, WAN Yongshuai1, LIU Qi1, GUO Chengchao2, SHI Mingsheng1
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1.College of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China;2.College of Civil Engineering, SunYatsen University, Guangzhou 510275, China
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| Abstract: |
| Based on monotonic direct shear tests, the effects of normal stress and shear rate on the interface properties such as shear stress, shear displacement, shear strength and shear modulus of interface between non water reacted polymer geotextile and polymer sand were studied. The test results show that, under the same mormal stress and shear rate, with the increase of shear displacement, the polymer geotextile interface and the polymer sand interface show shear softening characteristics. The mormal stress has a significant effect on the shear strength and shear modulus of the polymer geotextile interface. The mormal stress increases from 50kPa to 150kPa and the shear strength of the polymer geotextile interface increases from 15kPa to 46kPa at the shear rate of 2mm/min. Under the same mormal stress, with the shear rate increases from 1mm/min to 3mm/min, the shear strength and the shear modulus of the fluctuation of two kinds of shear interface only is in a small range. The shear rate has little effect on the friction angle of the polymer geotextile interface under monotonic direct shear condition, which indicates that the shear rate has a little influence on the shear strength and shear modulus of the polymer geotextile interface and the polymer sand interface. |
| Key words: direct shear test polymer interface property shear strength shear modulus |
