Research on shear strength of residual soils by ring shear tests

WU Di; JIAN Wen-bin; XU Chao

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Research on shear strength of residual soils by ring shear tests

更新时间：2026-06-25

- Research on shear strength of residual soils by ring shear tests
- Vol. 32, Issue 7, (2011)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411
- Online First：30 June 2011，
  
  Published：2011
- 稿件说明：
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WU Di, JIAN Wen-bin, XU Chao. Research on shear strength of residual soils by ring shear tests[J]. 2011, 32(7).
DOI：

WU Di, JIAN Wen-bin, XU Chao. Research on shear strength of residual soils by ring shear tests[J]. 2011, 32(7). DOI：

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

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 strength proved the existence of property of watering softening under large deformation. The character of strain softening of residual soil is analyzed by strain threshold

that is

various shear strengths should be different with various shear displacements. Specifically

the peak strength corresponding to the range of strain is between 0.02 and 0.06 while the residual strength corresponding to the range of strain is between 0.06 and 0.20. Besides

the results also indicate that the residual strength of residual soil is directly affected by the difference of mineral composition

which is the internal cause of inhomogeneity of residual soils

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