| 缪栋杰,宋丙辉,宋玉鹏,孙永福,苏志明,刘绍文.基于流变仪测试海底浅表层软黏土不排水强度研究[J].海洋工程,2022,40(6):97~104 |
| 基于流变仪测试海底浅表层软黏土不排水强度研究 |
| Testing the undrained shear strength of shallow submarine soft clay by rheometer |
| 投稿时间：2021-11-05 |
| DOI：10.16483/j.issn.1005-9865.2022.06.010 |
| 中文关键词: 浅表层软黏土 流变仪 不排水剪切强度 静力触探 灵敏度 |
| 英文关键词:shallow soft clay rheometer undrained shear strength CPT sensitivity |
| 基金项目:国家自然科学基金资助项目(42007274，41806079，41876066) |
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| 中文摘要: |
| 鉴于海底浅表层软黏土强度测试精细化程度不足的现状，引入流体测试中的流变仪，对青岛海域海底浅表层软黏土开展多组原状和重塑试样的不排水剪切强度试验，通过对比静力触探和微型十字板测试结果，验证了流变仪测试方法的有效性。基于流变仪试验结果，揭示了海底软黏土原状和重塑状态下不排水剪切破坏模式，探讨了海底软黏土不排水剪切强度和灵敏度随埋深及液性指数的发展演变趋势，评价了软黏土的结构性特征。最后，引入含水率与液限之比对海底浅表层软黏土重塑不排水剪切强度进行了归一化分析，为近海海洋开发活动提供技术支撑。 |
| 英文摘要: |
| In view of the insufficient refinement in strength testing of submarine shallow soft clay, the rheometer in the fluid test was introduced to measure the undrained shear strength of original and remolded submarine soft clay in the Qingdao sea area. Comparing the results of the piezocone penetration test and miniature vane test, the validity of the rheometer test method was verified. Based on the rheometer test results, the shear failure mode of submarine soft clay in its original and remolded states was revealed, the relationship between the undrained shear strength and sensitivity of the seabed soft clay and the buried depth and liquidity index was discussed, and the structural characteristics of submarine soft clay were evaluated. Finally, the ratio of water content to liquid limit was introduced to perform a normalized analysis on the undrained shear strength of remolded soft clay, providing reference for the construction of offshore geotechnical engineering. |
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