张翔宇,崔炜,刘毅,闫俊义,李海枫,聂鹏飞.滩涂光伏GFRP管桩原位承载试验及反馈分析研究[J].中国水利水电科学研究院学报,2024,22(3):250-260
滩涂光伏GFRP管桩原位承载试验及反馈分析研究
In-situ bearing test and feedback analysis of photovoltaic GFRP pile foundation
投稿时间:2024-01-05  
DOI:10.13244/j.cnki.jiwhr.20240006
中文关键词:  滩涂光伏  桩基础结构  玻璃纤维增强复合材料(GFRP)  承载试验  反演分析  数值模拟
英文关键词:mudflat photovoltaic  pile infrastructure  GFRP  bearing test  inverse analysis  numerical simulation
基金项目:国家自然科学基金项目(52379084);中国三峡新能源(集团)股份有限公司科研项目(三峡新能源合字【2021】621号);流域水循环模拟与调控国家重点实验室重点项目(HTGE0146B012022SS221)
作者单位E-mail
张翔宇 中国水利水电科学研究院, 北京 100038  
崔炜 中国水利水电科学研究院, 北京 100038 cuiwei@iwhr.com 
刘毅 中国水利水电科学研究院, 北京 100038  
闫俊义 中国三峡新能源(集团)股份有限公司, 北京 101100  
李海枫 中国水利水电科学研究院, 北京 100038  
聂鹏飞 中国水利水电科学研究院, 北京 100038  
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中文摘要:
      目前滩涂光伏基础结构主要采用预应力混凝土(PHC)管桩方案,在经济性与施工便利性上存在一定劣势。为提高滩涂光伏施工效率,针对滩涂场地地基承载力较弱、土方开挖困难等特点,在满足承载性能的基础上,优化桩基础施工便利性,提出采用具有重量优势的纤维复合材料桩——玻璃纤维(GFRP)管桩,探索GFRP管桩的承载性能。通过开展现场承载试验,获取GFRP管桩的承载力表现并与PHC管桩进行对比,同时结合数值模拟进行反馈分析。反馈分析及对比成果显示:PHC管桩能够稳定加载至2.0倍设计荷载,而GFRP管桩加载至1.2倍设计荷载之后出现较大挠度。结果表明GFRP管桩的承载性能满足设计荷载要求,但是在变形控制方面劣于现有PHC管桩方案,相比之下PHC管桩具有更充足的安全裕度。通过对GFRP材料桩基础的研究和探索,提出GFRP管桩制作工艺的改进措施,对GFRP管桩今后需要进一步研究的重点进行了展望。
英文摘要:
      At present,the prestressed concrete pipe pile(PHC)scheme is mainly adopted for mudflat photovoltaic infrastructure,which has certain disadvantages in economy and construction convenience.In order to improve the efficiency of photovoltaic construction in mudflat,in view of the weak bearing capacity of mudflat site foundation and the difficulty of earthwork excavation,and on the basis of meeting the bearing capacity,optimize the convenience of pile foundation construction,propose to use the fiber composite material pile with weight advantage-glass fiber(GFRP)pipe pile,and explore the bearing capacity of GFRP pipe pile.By conducting on-site bearing tests,the bearing capacity performance of GFRP pipe piles was obtained and compared with PHC pipe piles,while numerical simulation was combined for feedback analysis.Feedback analysis and comparison results show that PHC pile can be stably loaded to 2.0 times the design load,while GFRP pile shows significant deflection after being loaded to 1.2 times the design load.The results indicate that the bearing performance of GFRP pipe piles meets the design load requirements,but in terms of deformation control,it is inferior to existing PHC pipe pile schemes.In comparison,PHC pipe piles have more sufficient safety margin.Through the research and exploration of GFRP material pile foundation,improvement measures for the production process of GFRP pipe piles are proposed,and the future focus of further research on GFRP pipe piles is discussed.
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