码头护岸边坡稳定分析方法探讨及应用

发布时间：2018-05-04 17:37

本文选题：岸坡稳定 + 侧面摩阻　；参考：《华南理工大学》2014年硕士论文

【摘要】：码头岸坡稳定是边坡稳定工程的分支之一，桩基是高桩码头的基础结构，具有承上启下的作用，和码头岸坡同是高桩码头的主体结构之一，这两者往往都是共同存在的。接岸结构的稳定验算是码头结构计算中必不可少的一个分项，特别是在高桩码头结构型式中，其关系到整个码头结构的安全。在很多实际工程设计研究中，由于技术人员的个人经验或者工程外界的各种因素原因，往往让技术人员忽视了码头岸坡的水平位移对桩基产生的影响。本文先介绍码头岸坡的相关理论知识，，阐述码头岸坡稳定与桩基的相关理论，并举例分析前人的研究成果，再分析被动桩的相关理论及其计算方法。接着结合工程实例，对在码头接岸结构的稳定验算中，存在局部荷载较大的情况下时，采用国内专业化软件，结合相关工程技术规范，采用规范推荐的简单条分法进行计算分析。然后考虑土坡的侧面摩阻作用，再对其抗力分项系数结果进行修正，从而得出该工程接岸结构的处理方法可行，可供类似工程参考。接着采用国际通用有限元软件迈达斯（MADIS）对码头岸坡的位移进行计算分析，分析三种不同工况条件下的水平位移，而后把水平位移作用于桩基上，采用桩墙原理计算其桩基受力，得知岸坡的荷载作用值与桩基承受的弯矩和剪力不成线性比例，不能简单的以理论的相对值来判断其值增减。同时采用有限元折减方法对码头岸坡进行试算分析，得到折减系数，在折减系数的基础上，根据不同的工况条件下计算分析码头岸坡的水平位移，同样把水平位移施加于码头桩基上，计算分析其桩基的受力情况，而后把其受力反作用施加于码头岸坡，计算出各种不同工况条件下的水平位移，对比桩基受力前后的水平位移值，从而得出在高桩码头岸坡中，桩基的存在对码头岸坡的稳定具有一定的阻滑作用，但影响较微，可忽略不计，可以把桩基的微小阻滑作用当做码头岸坡稳定的安全富裕量。采用水平位移的方法分析桩土间的相互作用，该方法是可行的，可为类似工程提供借鉴。
[Abstract]:Bank slope stability of wharf is one of the branches of slope stability engineering, pile foundation is the foundation structure of high pile wharf, it has the function of connecting from the top to the next, and the bank slope of the wharf is one of the main structures of the high pile wharf, both of which often exist together. The stability checking calculation of the connection structure is an essential part in the calculation of the wharf structure, especially in the structure type of the high pile wharf, which is related to the safety of the whole wharf structure. In many practical engineering design studies, due to the personal experience of technicians or various factors outside the engineering, technicians often ignore the influence of horizontal displacement of wharf slope on pile foundation. This paper first introduces the relevant theoretical knowledge of wharf bank slope, expounds the related theory of wharf bank slope stability and pile foundation, and then analyzes the related theory of passive pile and its calculation method. Then combined with engineering examples, in the case of the stability check calculation of the wharf connection structure, when there is a large local load, the domestic specialized software is adopted, combined with the relevant engineering technical specifications. A simple slice method recommended by the standard is used for calculation and analysis. Then considering the side friction of the soil slope and modifying the results of the resistance sub-coefficient, it is concluded that the treatment method of the interfacing structure of the project is feasible and can be used as a reference for similar projects. Then the displacement of wharf bank slope is calculated and analyzed by the international general finite element software Midas and Madis, and the horizontal displacement under three different working conditions is analyzed. Then, the horizontal displacement is applied to the pile foundation, and the pile foundation force is calculated by using the pile-wall principle. It is known that the load action value of the bank slope is not linear with the bending moment and shear force of the pile foundation, and it can not be judged simply by the relative value of the theory. At the same time, the finite element reduction method is used to analyze the wharf bank slope, and the reduction coefficient is obtained. On the basis of the reduction coefficient, the horizontal displacement of the wharf bank slope is calculated and analyzed according to different working conditions. At the same time, the horizontal displacement is applied to the pile foundation of the wharf, the stress of the pile foundation is calculated and analyzed, and then the counteraction of the force is applied to the bank slope of the wharf, and the horizontal displacement under various working conditions is calculated. By comparing the horizontal displacement of pile foundation before and after loading, it is concluded that the existence of pile foundation has a certain anti-slip effect on the stability of wharf bank slope, but the influence is small and can be ignored. The small anti-slip effect of pile foundation can be regarded as a stable and safe abundance of wharf bank slope. The method of horizontal displacement is used to analyze the interaction between pile and soil. This method is feasible and can be used for reference in similar projects.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.3

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