粘土/砂土场地板桩墙塑性铰性能优化分析
发布时间：2020-12-28 20:03
对于锚定式板桩墙,工程上亟需一种能够合理确定设计参数和塑性铰位置的双锚板桩墙设计方法,以打破传统设计方法仅适用于单锚板桩墙的局限性。已有学者对静荷载和动荷载作用下的悬臂式、支撑式、锚定式板桩墙的性能进行了研究并给出了双锚板桩墙的设计方法。本文通过对现有单锚板桩墙的设计方法进行改进优化,提出了一种基于自由端法的双锚板桩墙设计方法。首先,本文验证了已有单锚板桩墙设计方法（Das和Rowe）的正确性,并研究了土体参数对单锚板桩墙弯矩的影响。结果表明,现有方法有较大的局限性,对于低粘聚力黏土场地,会因方程无解而无法给出合理的计算结果。其次,本文研究了单锚支护体系桩体特性指标的确定方法,并据此给出了支护体系桩体特性指标与开挖深度之间的变化规律。结果发现对于某些特殊工况下的单锚板桩墙支护体系失效问题,桩端埋置深度的增加并不能有效改善支护体系性能,桩自身的强度是影响安全性的唯一因素。此外,计算结果表明传统自由端法仅适用于不高于9m的挡墙。然而,低挡墙和高挡墙的设计参数是相同的。第一个锚点上的力可以由可靠的土压力分布图中获得,将第二个锚点上的力（可由已有研究和土压力图中获得）加倍,可以获得合理的结构形...
【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校
【文章页数】：75 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter 1 Introduction
1.1 Source of the topic
1.2 Research background and significance
1.3 Objective of this research
1.4 Scope of the research
1.5 Sheet pile walls
1.6 Types of sheet piles
1.6.1 Cantilever sheet piles
1.6.2 Anchored walls
1.7 Sequence of construction of sheet piles
1.8 The concept of plastic analysis
1.8.1 What actually leads to the formation of the plastic hinge?
1.8.2 Requirement for the full collapse of a beam
p, Ko, and Ka"> 1.8.3 Graphical representation of Kp, Ko, and Ka
1.9 Summary
Chapter 2 Literature on sheet piles （past to present）
2.1 Design of retaining walls in stiff clays （Padfield and Mair, 1984）
2.2 Gradual method （Krey, 1932 and Bowles, 1988）
2.3 Net pressure analysis of cantilever sheet pile wall （Day, 1999）
2.4 Principles of foundation engineering （Das, 1990）
2.5 Numerical analysis and dissertations
2.5.1 Analysis of model sheet pile walls with plastic hinges （Bourne-Webb et al.,2011）
2.5.2 Comparison of finite element predictions with results from a centrifuge test representing a double anchor wall in sand （Bourne-Webb et al., 2010）
2.5.3 Development of numerical models for geotechnical design （Smith, 2006）
2.5.4 Numerical studies of anchored sheet pile wall behavior （Bilgin, 2010）
2.5.5 Lateral earth pressure coefficient for anchored piles （Bilgin, 2012）
2.5.6 Effect of wall penetration depth on the behavior of sheet pile walls （Ramadan, 2013）
2.5.7 Numerical analysis of cantilever and anchored sheet pile walls at failure and comparison with classical methods （Torrabadella, 2013）
2.5.8 Comparison study for the seismic evaluation of anchored sheet pile walls （Zhai, 2009）
2.5.9 Developing a numerical model for the design of sheet pile walls （Brits,2014）
2.6 Justification for this research
2.7 Summary
Chapter 3 Numerical modelling of sheet pile wall
3.1 Introduction
3.2 The four sub-program of Plaxis 2D
3.2.1 Geometry
3.2.2 Calculation
3.2.3 Output program
3.2.4 Curves
3.3 Modeling of soils
3.3.1 Parameters of the Mohr-Coulomb criterion
3.3.2 Node and stress points
3.4 Modeling the sheet pile plate element
3.4.1 Modeling of interface element
3.4.2 Modeling of anchors
3.5 Properties of the materials used in the study
3.5.1 Material properties of subsurface soil
3.5.2 Properties of clay soil （Modified cam clay model）
3.5.3 Material properties of sheet piles
3.6 Case study
3.7 Validating the FEA results for modeling the free earth support method
3.8 Summary
Chapter 4 Performance of sheet pile wall in clay and sand soils
4.1 Introduction
4.1.1 Use of symbols
4.2 Loose sand overburden on loose sand
4.2.1 Result of loose sand overburden overlaying loose sand
4.3 Medium sand in medium sand
4.4 Dense sand in dense sand
4.5 Loose sand in silty clay
4.6 Medium dense sand in silty clay
4.7 Dense sand in silty clay
4.8 Plastic hinging of sheet pile wall embedded in clay
4.9 Comparison of results with and without surcharge loads
4.10 Analysis of a 21-m-long tie back wall
Chapter 5 Conclusion and Recommendation
References
Acknowledgement
【参考文献】：
期刊论文
[1]预应力锚索桩板墙工程病害分析及整治措施[J]. 陈华,赵有明,张发春. 重庆交通大学学报(自然科学版). 2010(01)
本文编号：2944321
【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校
【文章页数】：75 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter 1 Introduction
1.1 Source of the topic
1.2 Research background and significance
1.3 Objective of this research
1.4 Scope of the research
1.5 Sheet pile walls
1.6 Types of sheet piles
1.6.1 Cantilever sheet piles
1.6.2 Anchored walls
1.7 Sequence of construction of sheet piles
1.8 The concept of plastic analysis
1.8.1 What actually leads to the formation of the plastic hinge?
1.8.2 Requirement for the full collapse of a beam
p, Ko, and Ka"> 1.8.3 Graphical representation of Kp, Ko, and Ka
Chapter 2 Literature on sheet piles （past to present）
2.1 Design of retaining walls in stiff clays （Padfield and Mair, 1984）
2.2 Gradual method （Krey, 1932 and Bowles, 1988）
2.3 Net pressure analysis of cantilever sheet pile wall （Day, 1999）
2.4 Principles of foundation engineering （Das, 1990）
2.5 Numerical analysis and dissertations
2.5.1 Analysis of model sheet pile walls with plastic hinges （Bourne-Webb et al.,2011）
2.5.2 Comparison of finite element predictions with results from a centrifuge test representing a double anchor wall in sand （Bourne-Webb et al., 2010）
2.5.3 Development of numerical models for geotechnical design （Smith, 2006）
2.5.4 Numerical studies of anchored sheet pile wall behavior （Bilgin, 2010）
2.5.5 Lateral earth pressure coefficient for anchored piles （Bilgin, 2012）
2.5.6 Effect of wall penetration depth on the behavior of sheet pile walls （Ramadan, 2013）
2.5.7 Numerical analysis of cantilever and anchored sheet pile walls at failure and comparison with classical methods （Torrabadella, 2013）
2.5.8 Comparison study for the seismic evaluation of anchored sheet pile walls （Zhai, 2009）
2.5.9 Developing a numerical model for the design of sheet pile walls （Brits,2014）
2.6 Justification for this research
2.7 Summary
Chapter 3 Numerical modelling of sheet pile wall
3.1 Introduction
3.2 The four sub-program of Plaxis 2D
3.2.1 Geometry
3.2.2 Calculation
3.2.3 Output program
3.2.4 Curves
3.3 Modeling of soils
3.3.1 Parameters of the Mohr-Coulomb criterion
3.3.2 Node and stress points
3.4 Modeling the sheet pile plate element
3.4.1 Modeling of interface element
3.4.2 Modeling of anchors
3.5 Properties of the materials used in the study
3.5.1 Material properties of subsurface soil
3.5.2 Properties of clay soil （Modified cam clay model）
3.5.3 Material properties of sheet piles
3.6 Case study
3.7 Validating the FEA results for modeling the free earth support method
3.8 Summary
Chapter 4 Performance of sheet pile wall in clay and sand soils
4.1 Introduction
4.1.1 Use of symbols
4.2 Loose sand overburden on loose sand
4.2.1 Result of loose sand overburden overlaying loose sand
4.3 Medium sand in medium sand
4.4 Dense sand in dense sand
4.5 Loose sand in silty clay
4.6 Medium dense sand in silty clay
4.7 Dense sand in silty clay
4.8 Plastic hinging of sheet pile wall embedded in clay
4.9 Comparison of results with and without surcharge loads
4.10 Analysis of a 21-m-long tie back wall
Chapter 5 Conclusion and Recommendation
References
Acknowledgement
【参考文献】：
期刊论文
[1]预应力锚索桩板墙工程病害分析及整治措施[J]. 陈华,赵有明,张发春. 重庆交通大学学报(自然科学版). 2010(01)
本文编号：2944321
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