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| 重塑弱膨胀土抗剪强度的环剪试验研究 |
| Ring Shear Experimental Study on Shear Strength of Remolded Weak Expansive Soil |
| 投稿时间：2019-07-06 |
| DOI：10.16018/j.cnki.cn32-1650/n.201904009 |
| 中文关键词: 环剪试验 竖向应力 含水率 残余强度 弱膨胀土 |
| 英文关键词: ring shear test the vertical stress water content residual strength the weak expansive soil |
| 基金项目: |
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| 中文摘要: |
| 利用STHJY型环剪仪，对合肥地区弱膨胀土进行同级4次剪切环剪试验，探索残余强度与竖向应力和含水率的关系，研究发现:随着竖向应力的增加，残余强度在增加；随着含水率的增加，残余内摩擦角φ和残余黏聚力c呈减小趋势。其中φ随着含水率的增加降低幅度呈逐渐加大趋势，c随着含水率的增加降低幅度呈先增大后减小的趋势。通过数据拟合分析发现:残余强度与竖向应力呈良好的正线性相关关系，并符合Mohr-Coulomb准则；残余内摩擦角φ与含水率呈良好的负指数关系。 |
| 英文摘要: |
| By using the STHJY type ring shear apparatus, four shear ring shear tests were carried out on weak expansive soil in Hefei area at the same level to explore the relationship between residual strength and vertical stress and water content. It is found that the residual strength increases with the increase of vertical stress. With the increase of water content, residual internal friction angle φ and residual cohesion c decrease. Through data fitting analysis, it is found that there is a good positive linear correlation between residual strength and vertical stress, which conforms to Mohr-Coulomb criterion. The residual internal friction angle φ has a good negative exponential relationship with water content. |
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