非饱和湿陷性黄土的增湿变形特性研究
发布时间：2021-02-23 17:38
黄土作为一类具有水敏性的特殊土在世界上有着广泛的分布,其水敏性主要表现为含水率对变形、强度和本构关系等物理力学特性的影响。其中,湿陷性问题一直是黄土力学及工程中的研究热点。黄土多分布于干旱和半干旱地区,以非饱和状态存在,因此对非饱和黄土变形特性的研究对于解决实际工程问题具有重要意义。以甘肃省兰州市七里河地区的非饱和湿陷性黄土为研究对象,通过试验测试和理论分析相结合的方法,研究了非饱和黄土的增湿变形特性。本文的主要研究内容如下:1、采用兰州市七里河区的原状非饱和黄土,通过室内实验获得了该黄土的基本物理力学参数,主要包括天然含水率、液塑限、密度以及最大干密度和最优含水率等。2、利用三联式非饱和土直剪仪进行直剪试验,试验过程包括控制不同基质吸力的非饱和土直剪试验和不同含水率的常规直剪试验,得到试样的强度参数,再结合Lu基于吸应力曲线的强度公式,绘制出吸应力与有效饱和度之间的关系曲线。同利用压力板仪试验得出吸应力与有效饱和度之间的关系曲线与已有的三轴剪切试验得出的吸应力特征曲线对比分析。发现通过直剪试验可以很好的描述土体吸应力与有效饱和度之间的关系,各参数方便获取,并且基于吸应力曲线的强度公式...
【文章来源】：兰州理工大学甘肃省
【文章页数】：99 页
【学位级别】：硕士
【文章目录】：
ABSTRACT
摘要
CHAPTER1 INTRODUCTION
1.1 Background
1.2 Literature Review
1.2.1 Effective Stress Principle
1.2.2 Unsaturated Soil Constitutive Model
1.2.3 Stress-Strain Types and Constitutive Models of Loess
1.2.4 Research Status of Loess Moisturizing Deformation Test
1.3 Research Purpose and Contents and Technical Route
1.3.1 Research Purpose
1.3.2 Research Contents
1.3.3 Technical Route
CHAPTER2:SUCTION STRESS CHARACTERISTIC CURVE OF UNDISTURBED LOESS
2.1 Interparticle Suction
2.2 Test Scheme and Method
2.2.1 Determination of Basic Physical Properties of Loess
2.2.2 Soil-water Characteristic Test
2.2.3 Direct Shear Test of Unsaturated Soil
2.2.3.1 Test Instrument
2.2.3.2 Test Procedure
2.2.3.3 Test Principle and Scheme
2.2.3.4 Analysis of Test Results
2.3 Analysis of Shear Strength Based on Suction Stress
2.3.1 Shear Strength Criterion Based on a Single Stress Variable
2.3.2 Strength Criterion Based on Two Independent Stress Variables
2.3.3 Shear Strength Based on Suction Stress
2.4 Summary of This Chapter
CHAPTER3:LOGISTIC MODEL OF SOIL ISOTROPIC CONSOLIDATION CURVE
3.1 Introduction
3.2 Logistic Model for Isotropic Consolidation
3.2.1 Model Establishment
3.2.2 Model Parameter Determination
3.2.3 Advance Consolidation Pressure
3.3 Analysis and Discussion
3.4 Conclusion
CHAPTER4:ONE-DIMENSIONAL MOISTURIZING CONSOLIDATION TEST OF UNDISTURBED LOESS
4.1 Introduction
4.2 Consolidation Test Scheme and Method
4.2.1.Test Instrument
4.2.2.Test Procedure
4.2.3.Test Principle and Scheme
4.3.Analysis of Lateral Compression Deformation of Unsaturated Undisturbed Loess
4.3.1 Consolidation Tests under Different Hydraulic Action Paths
4.4 One-Dimensional Moisturizing Deformation Constitutive Model
4.5 Moisturizing Deformation Analysis
4.6 Summary of this Chapter
CHAPTER5 CONCLUSIONS AND EXPECTATIONS
5.1 Conclusions
5.2 Expectations
References
Academic Conferences Attended
Acknowledgements
【参考文献】：
期刊论文
[1]考虑黄土结构性和各向异性的修正剑桥模型[J]. 张玉伟,翁效林,宋战平,谢永利. 岩土力学. 2019(03)
[2]干湿循环条件下压实黄土变形特性试验研究[J]. 王飞,李国玉,穆彦虎,张鹏,吴亚虎,范善智. 岩土力学. 2016(08)
[3]基于Logistic函数的贝叶斯概率矩阵分解算法[J]. 方耀宁,郭云飞,兰巨龙. 电子与信息学报. 2014(03)
[4]非饱和土的修正SFG模型研究[J]. 刘艳,赵成刚,韦昌富. 岩土工程学报. 2012(08)
[5]土力学理论的发展和面临的挑战[J]. 赵成刚,韦昌富,蔡国庆. 岩土力学. 2011(12)
[6]非饱和土广义有效应力原理[J]. 赵成刚,蔡国庆. 岩土力学. 2009(11)
[7]非饱和土本构模型中应力变量选择研究[J]. 周建. 岩石力学与工程学报. 2009(06)
[8]黄土弹塑性损伤本构模型[J]. 夏旺民,郭新明,郭增玉,蔡庆娥. 岩石力学与工程学报. 2009(S1)
[9]考虑结构性影响的原状黄土本构关系[J]. 陈存礼,何军芳,杨鹏. 岩土力学. 2007(11)
[10]黄土的增湿变形特性及其与结构性的关系[J]. 陈存礼,高鹏,胡再强. 岩石力学与工程学报. 2006(07)
本文编号：3047973
【文章来源】：兰州理工大学甘肃省
【文章页数】：99 页
【学位级别】：硕士
【文章目录】：
ABSTRACT
摘要
CHAPTER1 INTRODUCTION
1.1 Background
1.2 Literature Review
1.2.1 Effective Stress Principle
1.2.2 Unsaturated Soil Constitutive Model
1.2.3 Stress-Strain Types and Constitutive Models of Loess
1.2.4 Research Status of Loess Moisturizing Deformation Test
1.3 Research Purpose and Contents and Technical Route
1.3.1 Research Purpose
1.3.2 Research Contents
1.3.3 Technical Route
CHAPTER2:SUCTION STRESS CHARACTERISTIC CURVE OF UNDISTURBED LOESS
2.1 Interparticle Suction
2.2 Test Scheme and Method
2.2.1 Determination of Basic Physical Properties of Loess
2.2.2 Soil-water Characteristic Test
2.2.3 Direct Shear Test of Unsaturated Soil
2.2.3.1 Test Instrument
2.2.3.2 Test Procedure
2.2.3.3 Test Principle and Scheme
2.2.3.4 Analysis of Test Results
2.3 Analysis of Shear Strength Based on Suction Stress
2.3.1 Shear Strength Criterion Based on a Single Stress Variable
2.3.2 Strength Criterion Based on Two Independent Stress Variables
2.3.3 Shear Strength Based on Suction Stress
2.4 Summary of This Chapter
CHAPTER3:LOGISTIC MODEL OF SOIL ISOTROPIC CONSOLIDATION CURVE
3.1 Introduction
3.2 Logistic Model for Isotropic Consolidation
3.2.1 Model Establishment
3.2.2 Model Parameter Determination
3.2.3 Advance Consolidation Pressure
3.3 Analysis and Discussion
3.4 Conclusion
CHAPTER4:ONE-DIMENSIONAL MOISTURIZING CONSOLIDATION TEST OF UNDISTURBED LOESS
4.1 Introduction
4.2 Consolidation Test Scheme and Method
4.2.1.Test Instrument
4.2.2.Test Procedure
4.2.3.Test Principle and Scheme
4.3.Analysis of Lateral Compression Deformation of Unsaturated Undisturbed Loess
4.3.1 Consolidation Tests under Different Hydraulic Action Paths
4.4 One-Dimensional Moisturizing Deformation Constitutive Model
4.5 Moisturizing Deformation Analysis
4.6 Summary of this Chapter
CHAPTER5 CONCLUSIONS AND EXPECTATIONS
5.1 Conclusions
5.2 Expectations
References
Academic Conferences Attended
Acknowledgements
【参考文献】：
期刊论文
[1]考虑黄土结构性和各向异性的修正剑桥模型[J]. 张玉伟,翁效林,宋战平,谢永利. 岩土力学. 2019(03)
[2]干湿循环条件下压实黄土变形特性试验研究[J]. 王飞,李国玉,穆彦虎,张鹏,吴亚虎,范善智. 岩土力学. 2016(08)
[3]基于Logistic函数的贝叶斯概率矩阵分解算法[J]. 方耀宁,郭云飞,兰巨龙. 电子与信息学报. 2014(03)
[4]非饱和土的修正SFG模型研究[J]. 刘艳,赵成刚,韦昌富. 岩土工程学报. 2012(08)
[5]土力学理论的发展和面临的挑战[J]. 赵成刚,韦昌富,蔡国庆. 岩土力学. 2011(12)
[6]非饱和土广义有效应力原理[J]. 赵成刚,蔡国庆. 岩土力学. 2009(11)
[7]非饱和土本构模型中应力变量选择研究[J]. 周建. 岩石力学与工程学报. 2009(06)
[8]黄土弹塑性损伤本构模型[J]. 夏旺民,郭新明,郭增玉,蔡庆娥. 岩石力学与工程学报. 2009(S1)
[9]考虑结构性影响的原状黄土本构关系[J]. 陈存礼,何军芳,杨鹏. 岩土力学. 2007(11)
[10]黄土的增湿变形特性及其与结构性的关系[J]. 陈存礼,高鹏,胡再强. 岩石力学与工程学报. 2006(07)
本文编号：3047973
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