| 吸力基础抗拔与拔出机理的研究进展 |
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| 引用本文： | 陈林平,张雨坤,李大勇.吸力基础抗拔与拔出机理的研究进展[J].工程地质学报(英文版),2020,28(3):639-649. |
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| 作者姓名： | 陈林平 张雨坤 李大勇 |
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| 作者单位： | ①.福州大学土木工程学院，福州 350116，中国 |
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| 基金项目： | 国家自然科学基金资助项目51879044山东科技大学科研创新团队资助项目2015TDJH104 |
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| 摘 要： | 吸力基础具有施工方便、可回收利用及造价低等优点,在海洋平台及海上风电工程中得到了成功应用。吸力基础用于系泊深海浮动式平台时,抗拔承载特性是工程设计的重要因素。海上风电场面临着服役期满后的升级改造问题,需采用更大功率的发电设备,风机叶片直径、塔架高度随之增加,原基础难以满足新的设计要求,从可持续发展角度,塔架基础的拔出、回收等方面正逐渐引起人们的高度重视。本文介绍了吸力基础抗拔、拔出特性方面取得的研究成果,阐述了影响基础抗拔和拔出特性的因素,阐明了吸力基础拔出的力学机制与作用机理。通过文献调研推断:注水拔出吸力基础,砂土会发生渗流破坏,黏土会产生劈裂破坏,会导致基础无法继续上拔,应结合拉力上拔或振动法对基础进行回收。
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| 关 键 词： | 吸力基础 抗拔承载力 注水拔出 拔出机理 海上风电 |
| 收稿时间： | 2019-01-16 |
REVIEW OF UPLIFT CAPACITY AND PULLOUT MECHANISM OF SUCTION CAISSONS FOR OFFSHORE FOUNDATION |
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| CHEN Linping,ZHANG Yukun,LI Dayong.REVIEW OF UPLIFT CAPACITY AND PULLOUT MECHANISM OF SUCTION CAISSONS FOR OFFSHORE FOUNDATION[J].Journal of Engineering Geology,2020,28(3):639-649. |
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| Authors: | CHEN Linping ZHANG Yukun LI Dayong |
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| Institution: | ①.School of Civil Engineering, Fuzhou University, Fuzhou 350116, China②.Shandong Province Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China |
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| Abstract: | The suction caisson is a new type of foundation having advantages such as easy construction,reuse and low cost. It has been successfully applied to offshore platforms and offshore wind turbines. Uplift capacity is the key factor in design of suction caissons used to fix the floating offshore platforms in deep water. Moreover,offshore wind farms should be updated with increasing the diameter of the wind turbine blades and the tower height,thus the existing foundation is not available to meet new design requirements. From the perspective of sustainable development,pullout and reuse of suction caissons are gradually attracting more attention. This paper presents an overview of the researches on uplift capacity and pullout characteristics of suction caissons,and also discusses the influencing factors of pullout capacity in the aspects of loading rate and soil properties. Investigations from the literature show that pumping water into suction caissons can cause seepage failure in sand,splitting failure in clay,and at this time the caissons cannot continue to be pulled out. It is recommended to be extracted by pullout loading or vibrating. |
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| Keywords: | Suction caissons Uplift capacity Pullout by injecting water Pullout mechanism Offshore wind turbines |
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