自沉/吸贯式新型海洋光伏一体化结构在分层土中沉贯安装模型试验研究  

EXPERIMENTAL STUDY ON INSTALLATION MODEL OF SELF-SINKING/SUCTION-PENETRATION INTEGRATED OFFSHORE PHOTOVOLTAIC STRUCTURE IN LAYERED SOIL

作　　者：张雨坤 蓝艺超 李大勇 项乾 孙传平 杨逸飞 Zhang Yukun;Lan Yichao;Li Dayong;Xiang Qian;Sun Chuanping;Yang Yifei(School of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]山东科技大学土木工程与建筑学院,青岛266590 [2]中国石油大学(华东)储运与建筑工程学院,青岛266580

出　　处：《太阳能学报》2025年第4期280-290,共11页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(52371301);山东省高等学校青年创新团队支持计划。

摘　　要：为提高海上光伏建设安装效率同时降低施工作业时间和成本,提出自沉/吸贯式近海新型固定式光伏一体化结构。针对中国典型层状海床地基,开展模型试验研究海洋光伏一体化结构沉贯安装特性。试验研究表明在相同沉贯深度下,一体化结构比单桶吸力基础在吸力沉贯完成后产生的土塞高度更高,当一体化结构穿过上层黏土层,刺入下层砂土层时,一体化结构沉贯效果更加显著,吸力值变化幅度比单桶吸力基础沉贯增大320%,同时该砂土层存在明显的“渗流减阻”效应,且在“渗流减阻”效应下,一体化结构在重力和吸力的共同作用下易发生类似于“溜桩”效应,而单桶吸力基础沉贯试验中并未出现“溜桩”效应,表明一体化结构沉贯过程需要考虑“溜桩”风险。提出分层土中考虑渗流减阻作用的沉贯阻力及吸力修正公式。试验得到的最大吸力较理论修正公式计算的最大吸力值减小约7.4%,理论分析计算方法与模型试验结果吻合度较高。In order to enhance the efficiency of offshore photovoltaic construction and installation while minimizing time and cost,a novel“self-sinking/suction-penetration near-shore fixed photovoltaic integrated structure”was proposed.Model experiments were conducted to investigate the installation characteristics of the offshore photovoltaic integrated structure on typical layered seabed foundations in China.The experimental findings demonstrate that,at identical penetration depths,the integrated structure yields a greater soil plug height following suction penetration compared to a single suction caisson.As the integrated structure penetrates the upper clay layer and punctures the lower sand layer,the penetration effect becomes more pronounced,resulting in a 320%increase in suction force compared to the single suction caisson.Moreover,a discernible“seepage reduction”effect is observed in the sand layer.Under this effect,the integrated structure is susceptible to a“pile running”phenomenon due to the combined influence of gravity and suction.However,the“pile running”phenomenon was not observed during the single suction caisson penetration test,indicating the need to consider the“pile running”risk in the penetration process of integrated structure.A modified formula for penetration resistance and suction,accounting for the seepage resistance in layered soil,was proposed.The experimental results show that the maximum suction obtained is approximately 7.4%lower than the maximum suction calculated using the theoretical modified formula.The theoretical analysis method exhibits a high degree of agreement with the results of the model test.

关 键 词：海洋光伏 一体化结构 分层土 沉贯阻力 沉贯吸力 渗流减阻作用 

分 类 号：P754[天文地球—海洋科学]