残积土抗剪强度的环剪试验研究

›› 2011, Vol. 32 ›› Issue (7): 2045-2050.

残积土抗剪强度的环剪试验研究

吴迪^{1, 2}，简文彬^{3, 4}，徐超^{1, 2}

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

收稿日期:2010-03-01 出版日期:2011-07-10 发布日期:2011-06-30
作者简介:吴迪，男，1982年生，博士研究生，主要从事边坡、土工合成材料及地基处理方面的研究工作
基金资助:
国家自然科学基金（No. 40672176）

Research on shear strength of residual soils by ring shear tests

WU Di^{1, 2}，JIAN Wen-bin^{3, 4}，XU Chao^{1, 2}

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

Received:2010-03-01 Online:2011-07-10 Published:2011-06-30

摘要/Abstract

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

关键词: 残积土, 工程特性, 抗剪强度, 环剪试验, 残余强度

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

Key words: residual soil, engineering characteristics, shear strength, ring shear test, residual strength

中图分类号:

TU 411

吴迪，简文彬，徐超. 残积土抗剪强度的环剪试验研究[J]. , 2011, 32(7): 2045-2050.

WU Di ，JIAN Wen-bin ，XU Chao. Research on shear strength of residual soils by ring shear tests[J]. , 2011, 32(7): 2045-2050.

参考文献

相关文章 15

[1]	涂园, 王奎华, 周建, 胡安峰, . 有效应力法和有效固结压力法在预压地基强度计算中的应用[J]. 岩土力学, 2020, 41(2): 645-654.
[2]	李小刚, 朱长歧, 崔翔, 张珀瑜, 王睿, . 含碳酸盐混合砂的三轴剪切试验研究[J]. 岩土力学, 2020, 41(1): 123-131.
[3]	张晨阳, 谌民, 胡明鉴, 王新志, 唐健健, . 细颗粒组分含量对钙质砂抗剪强度的影响[J]. 岩土力学, 2019, 40(S1): 195-202.
[4]	王欢, 陈群, 王红鑫, 张文举, . 不同压实度和基质吸力的粉煤灰三轴试验研究[J]. 岩土力学, 2019, 40(S1): 224-230.
[5]	谢辉辉, 许振浩, 刘清秉, 胡桂阳, . 干湿循环路径下弱膨胀土峰值及残余强度演化研究[J]. 岩土力学, 2019, 40(S1): 245-252.
[6]	蔡雨, 徐林荣, 周德泉, 邓超, 冯晨曦, . 自平衡与传统静载试桩法模型试验研究[J]. 岩土力学, 2019, 40(8): 3011-3018.
[7]	郑耀林, 章荣军, 郑俊杰, 董超强, 陆展, . 絮凝-固化联合处理超高含水率吹填淤泥浆的试验研究[J]. 岩土力学, 2019, 40(8): 3107-3114.
[8]	洪本根, 罗嗣海, 胡世丽, 王观石, 姚康, . 基质吸力对非饱和离子型稀土抗剪强度的影响[J]. 岩土力学, 2019, 40(6): 2303-2310.
[9]	周小文, 程力, 周密, 王齐, . 离心机中球形贯入仪贯入黏土特性[J]. 岩土力学, 2019, 40(5): 1713-1720.
[10]	王士权, 魏明俐, 何星星, 张亭亭, 薛强, . 基于核磁共振技术的淤泥固化水分转化机制研究[J]. 岩土力学, 2019, 40(5): 1778-1786.
[11]	邵生俊, 陈菲, 邓国华, . 基于平面应变统一强度公式的结构性黄土填料挡墙地震被动土压力研究[J]. 岩土力学, 2019, 40(4): 1255-1262.
[12]	付宏渊, 刘杰, 曾铃, 卞汉兵, 史振宁, . 考虑荷载与浸水条件的预崩解炭质泥岩变形与强度试验[J]. 岩土力学, 2019, 40(4): 1273-1280.
[13]	张景科, 单婷婷, 王玉超, 王南, 樊孟, 赵林毅, . 土遗址锚固土体-浆体（CGN+C）界面力学性能[J]. 岩土力学, 2019, 40(3): 903-912.
[14]	江强强, 刘路路, 焦玉勇, 王浩, . 干湿循环下滑带土强度特性与微观结构试验研究[J]. 岩土力学, 2019, 40(3): 1005-1012.
[15]	邱敏, 袁青, 李长俊, 肖超超, . 基于孔穴扩张理论的黏土不排水抗剪强度计算方法对比研究[J]. 岩土力学, 2019, 40(3): 1059-1066.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed