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| 无黏性土的冲刷机理 |
| Erosion Mechanism of Cohesionless Soil |
| 投稿时间：2015-09-10 |
| DOI：10.16018/j.cnki.cn32-1650/n.201601014 |
| 中文关键词: 无黏性土 砂 冲刷 临界剪切应力 平均粒径 |
| 英文关键词: Cohesionless soil sand erosion critical shear stress mean diameter |
| 基金项目:江苏省交通运输科技项目(2013Y04-2) |
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| 中文摘要: |
| 无黏性土的剪切强度主要来源于颗粒间的摩擦力，无黏性土的抗冲刷主要来源于土粒重量。根据无黏性土颗粒冲刷过程中的受力平衡分析，无黏性土颗粒冲刷临界剪切应力(冲刷启动剪切应力)与颗粒粒径成正比，已有的砂、砾冲刷试验结果验证了无黏性土颗粒冲刷临界剪切应力理论。 |
| 英文摘要: |
| Shear strength of cohesionless soil mainly comes from the friction between the particles of cohesionless soil, the anti-erosion force mainly comes from the soil grain weight. Based on force equilibrium analysis in the erosion process of cohesionless soil particle, the critical shear stress of cohesionless soil is proportional to the particle size. Existing sand and gravel erosion test results show erosion critical shear stress theory of cohesionless soils. |
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