| 残积土抗剪强度的环剪试验研究 |
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| 引用本文： | 吴迪,简文彬,徐超. 残积土抗剪强度的环剪试验研究[J]. 岩土力学, 2011, 32(7): 2045-2050 |
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| 作者姓名： | 吴迪 简文彬 徐超 |
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| 作者单位： | 1. 同济大学 岩土及地下工程教育部重点实验室，上海 200092；2. 同济大学 地下建筑与工程系，上海 200092； 3. 福州大学 环境与资源学院，福州 350108；4. 福州大学 岩土工程与工程地质研究所，福州 350108 |
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| 摘 要： | 残积土风化剧烈，研究其大变形下的工程特性很有必要。利用环剪仪的试验特点，可以研究土体在较大剪切位移下抗剪强度的变化规律。通过对残积土残余和峰值强度的环剪试验测定和对试验数据的整理与对比分析，得到了含水率与残余强度指标之间的关系，证明大变形下残积土具有浸水软化的特性；从应变阈值角度分析了残积土应变软化的性质，不同剪切位移下的残积土具有不同的抗剪强度，所研究的残积土达到峰值强度对应的应变介于0.02～0.06之间，而到达基本稳定的残余强度所需要的应变介于0.06～0.20区域内。研究还发现，矿物成分不同直接影响到残积土的残余强度，是残积土不均匀性的内部因素
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| 关 键 词： | 残积土 工程特性 抗剪强度 环剪试验 残余强度 |
| 收稿时间： | 2010-03-01 |
Research on shear strength of residual soils by ring shear tests |
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| WU Di,JIAN Wen-bin,XU Chao. Research on shear strength of residual soils by ring shear tests[J]. Rock and Soil Mechanics, 2011, 32(7): 2045-2050 |
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| Authors: | WU Di JIAN Wen-bin XU Chao |
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| Affiliation: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. College of Environment and Resources, Fuzhou University, Fuzhou 350108, China; 4. Institute of Geotechnical and Geological Engineering, Fuzhou University, Fuzhou 350108, China |
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| Abstract: | It is imperative to study the engineering characteristics of residual soils which is weathered violently under large deformation.Making use of the test features of ring shear apparatus,the change law of shear strength of soils under large shear displacement can be studied.The experimental determination of residual strength and peak strength indexes of residual soil is conducted by ring shear tests.Test data are analyzed through arrangement and comparison.The relationship between water content and residual s... |
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| Keywords: | residual soil engineering characteristics shear strength ring shear test residual strength |
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