辽滨沿海经济区码头桩基布置与计算方法研究
发布时间：2018-11-26 12:19
【摘要】：高桩码头是国内外港口码头常用的结构形式，适用于软土地基。高桩梁板式码头的横向排架跨度较大，能更好的运用桩体承载力，且受力明确，装配程度高，施工速度快，在国内外得到了广泛的应用。 针对辽滨沿海经济区码头所在地较为复杂的地质条件，桩基持力层的选择需考虑各种因素，同时需要对桩基设计进行承载力核算和对施工情况进行追踪分析。另外，高桩码头叉桩扭角的布置，也是高桩码头设计中的关键点。高桩码头要承受较大的水平荷载，而结构本身可以承受水平荷载的能力与码头桩基扭角布置有很大的关系。寻找在不同水平荷载组合作用下，高桩码头桩基扭角合理布置方案，可以充分发挥桩基承载力，且对结构抗震和耐久使用等有重要意义。 高桩码头的系缆墩作为辅助设施，其结构形式多采用墩台形式，主要承受系缆力。系缆墩的桩基布置形式可以有扇形和叉桩形布置等，由于墩台尺寸有限，寻求合理的系缆墩桩基布置形式将不仅满足设计需要、减少工程费用，在很大程度上给施工带来可行性和有效提高施工效率。作为辽滨经济区内的首个液体化工码头，该码头的桩基建设经验将对后续码头的建设起到促进和指导的作用。 本文主要工作有： 1、首先根据地质勘查报告进行桩基初步设计，后结合试桩结果确定合理的桩基持力层。通过对比分析试桩结果中实际桩承载力与计算值的差异，给出单桩承载力的数值及组成，，并预测桩基承载力的变化趋势。根据工程施工经验，总结当地地基条件下的沉桩特点和需采取的措施。 2、通过建立码头标准结构段计算模型，分析四种工况条件下，不同叉桩扭角对码头结构位移和桩身弯矩的影响。总结码头结构横向荷载和纵向荷载的控制工况，归纳扭角变化带来的结构响应，给出保证满足桩基承载力且结构位移和弯矩控制在合理范围内的合理叉桩扭角值及其计算方法。 3、建立系缆墩结构的有限元分析模型，将系缆墩扇形式桩基分布和叉桩式桩基分布模型进行对比，分析不同分布形式下单桩承载力的大小和均匀分布的程度，以及桩基各向位移变化和接触泥面位置处位移的变化，总结两种桩基分布形式的适用情况。并根据项目具体情况，从技术、施工条件和综合经济效益方面来分析这两种桩基分布在本项目区域的适用性。 4、研究成果已在辽滨沿海经济区码头中得到运用。通过本文理论研究和计算分析，结合工程应用，总结辽滨经济区高桩码头桩基持力层、桩基扭角布置和系缆墩桩基布置研究结论和经验，分析研究工作的不足和明确今后研究的方向。
[Abstract]:High-pile wharf is a common structure form of port wharf at home and abroad, which is suitable for soft soil foundation. High pile beam plate wharf has a long span and can better use the bearing capacity of pile body, and the force is clear, the assembly degree is high, and the construction speed is fast, so it has been widely used at home and abroad. In view of the complex geological conditions of the docks in the coastal economic zone of Liaobin, various factors should be taken into account in the selection of pile bearing layers. At the same time, it is necessary to calculate the bearing capacity of the pile foundation design and to track and analyze the construction situation. In addition, the layout of fork-pile torsion angle of high-pile wharf is also the key point in the design of high-pile wharf. The high pile wharf has to bear a large horizontal load, and the ability of the structure itself to withstand the horizontal load has a great relationship with the arrangement of the torsional angle of the wharf foundation. Under the different horizontal load combination, the reasonable arrangement scheme of pile foundation torsion angle of high pile wharf can give full play to the bearing capacity of pile foundation, and it is of great significance to the seismic resistance and durability of the structure. The mooring pier of high pile wharf is used as auxiliary facility, and its structure is mostly pier and abutment, which mainly bear mooring force. The layout of pile foundation of mooring pier can have sector shape and fork pile shape arrangement. Because of the limited size of pier and abutment, it will not only meet the need of design and reduce the cost of engineering, but also find a reasonable layout form of pile foundation of mooring pier. To a great extent, it brings feasibility to construction and effectively improves construction efficiency. As the first liquid chemical wharf in Liaobin economic zone, the pile foundation construction experience of the wharf will promote and guide the subsequent wharf construction. The main work of this paper is as follows: 1. First, the preliminary design of pile foundation is carried out according to the geological exploration report, and then the reasonable bearing layer of pile foundation is determined according to the results of pile test. By comparing and analyzing the difference between the actual pile bearing capacity and the calculated value, the value and composition of the single pile bearing capacity are given, and the variation trend of the pile foundation bearing capacity is predicted. According to the engineering construction experience, the characteristics of piling under local foundation conditions and the measures to be taken are summarized. 2. By establishing the calculation model of standard structure section of wharf, the influence of different forked pile torsion angle on the displacement and bending moment of wharf structure is analyzed under four working conditions. The control conditions of transverse load and longitudinal load of wharf structure are summarized, the structural response caused by the variation of torsional angle is induced, and the reasonable torsional angle value of fork pile and its calculation method are given to ensure that the bearing capacity of pile foundation is satisfied and the structural displacement and bending moment are controlled within a reasonable range. 3. The finite element analysis model of mooring cable pier structure is established, and the distribution model of pile foundation in fan form of mooring cable pier is compared with the distribution model of cross-pile type pile foundation, and the size of bearing capacity and the degree of uniform distribution of bearing capacity of pile issued by different distribution forms are analyzed. The variation of displacement in each direction of pile foundation and the change of displacement at the position of contact mud surface are summarized, and the application of the two kinds of pile foundation distribution forms is summarized. According to the specific conditions of the project, the applicability of the two pile foundations in the project area is analyzed from the aspects of technology, construction conditions and comprehensive economic benefits. 4. The research results have been applied in the dock of Liaoning coastal economic zone. Through theoretical research and calculation analysis in this paper, combined with engineering application, the conclusions and experiences of pile foundation bearing layer, torsional angle arrangement of pile foundation and arrangement of tie-cable pier pile foundation of high pile wharf in Liaobin economic zone are summarized. Analyze the deficiency of research work and clarify the direction of future research.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.1
本文编号：2358541
[Abstract]:High-pile wharf is a common structure form of port wharf at home and abroad, which is suitable for soft soil foundation. High pile beam plate wharf has a long span and can better use the bearing capacity of pile body, and the force is clear, the assembly degree is high, and the construction speed is fast, so it has been widely used at home and abroad. In view of the complex geological conditions of the docks in the coastal economic zone of Liaobin, various factors should be taken into account in the selection of pile bearing layers. At the same time, it is necessary to calculate the bearing capacity of the pile foundation design and to track and analyze the construction situation. In addition, the layout of fork-pile torsion angle of high-pile wharf is also the key point in the design of high-pile wharf. The high pile wharf has to bear a large horizontal load, and the ability of the structure itself to withstand the horizontal load has a great relationship with the arrangement of the torsional angle of the wharf foundation. Under the different horizontal load combination, the reasonable arrangement scheme of pile foundation torsion angle of high pile wharf can give full play to the bearing capacity of pile foundation, and it is of great significance to the seismic resistance and durability of the structure. The mooring pier of high pile wharf is used as auxiliary facility, and its structure is mostly pier and abutment, which mainly bear mooring force. The layout of pile foundation of mooring pier can have sector shape and fork pile shape arrangement. Because of the limited size of pier and abutment, it will not only meet the need of design and reduce the cost of engineering, but also find a reasonable layout form of pile foundation of mooring pier. To a great extent, it brings feasibility to construction and effectively improves construction efficiency. As the first liquid chemical wharf in Liaobin economic zone, the pile foundation construction experience of the wharf will promote and guide the subsequent wharf construction. The main work of this paper is as follows: 1. First, the preliminary design of pile foundation is carried out according to the geological exploration report, and then the reasonable bearing layer of pile foundation is determined according to the results of pile test. By comparing and analyzing the difference between the actual pile bearing capacity and the calculated value, the value and composition of the single pile bearing capacity are given, and the variation trend of the pile foundation bearing capacity is predicted. According to the engineering construction experience, the characteristics of piling under local foundation conditions and the measures to be taken are summarized. 2. By establishing the calculation model of standard structure section of wharf, the influence of different forked pile torsion angle on the displacement and bending moment of wharf structure is analyzed under four working conditions. The control conditions of transverse load and longitudinal load of wharf structure are summarized, the structural response caused by the variation of torsional angle is induced, and the reasonable torsional angle value of fork pile and its calculation method are given to ensure that the bearing capacity of pile foundation is satisfied and the structural displacement and bending moment are controlled within a reasonable range. 3. The finite element analysis model of mooring cable pier structure is established, and the distribution model of pile foundation in fan form of mooring cable pier is compared with the distribution model of cross-pile type pile foundation, and the size of bearing capacity and the degree of uniform distribution of bearing capacity of pile issued by different distribution forms are analyzed. The variation of displacement in each direction of pile foundation and the change of displacement at the position of contact mud surface are summarized, and the application of the two kinds of pile foundation distribution forms is summarized. According to the specific conditions of the project, the applicability of the two pile foundations in the project area is analyzed from the aspects of technology, construction conditions and comprehensive economic benefits. 4. The research results have been applied in the dock of Liaoning coastal economic zone. Through theoretical research and calculation analysis in this paper, combined with engineering application, the conclusions and experiences of pile foundation bearing layer, torsional angle arrangement of pile foundation and arrangement of tie-cable pier pile foundation of high pile wharf in Liaobin economic zone are summarized. Analyze the deficiency of research work and clarify the direction of future research.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.1
【参考文献】
相关期刊论文 前1条
1 许海锋;;高桩码头工程中的桩基平台施工技术分析[J];中国水运(下半月);2012年01期
本文编号：2358541
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