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| 湖北某风力机基础整体顶升纠偏技术研究 |
| Research on the Overall Jacking and Alignment Technology of a Wind Turbine Foundation in Hubei Province |
| 投稿时间：2024-03-22 修订日期：2024-05-10 |
| DOI： |
| 中文关键词: 风力机 梁板式基础 顶升纠偏 有限元分析 水准测量 |
| 英文关键词: Wind Turbine Beam-slab Foundations lifting Correction Finite Element Analysis Leveling measurement |
| 基金项目: |
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| 中文摘要: |
| 湖北某风电场5#风力机基础混凝土因风致疲劳损伤较大，导致基础环水平度偏差远超3mm的正常运行要求，现场组织多次塔筒顶升纠偏，但均告失败，后改用整体基础顶升纠偏方案。为此，本文依据工程实际情况建立了梁板式基础有限元分析模型，通过对不同部位顶升方案的有限元分析，最终确定了斜梁顶升，支撑端局部掏土至边梁的整体顶升纠偏方案，并予以实施，最终实现了基础环水平度由27mm偏差纠偏至2.7mm，满足3mm的风力机正常运行目标。同时，纠偏过程中通过采用多级顶升加载制度结合位移、水准测量系统以及混凝土裂缝、应变等同步监控，不仅实现了对顶升过程的精准控制，而且实现了整个顶升纠偏过程的结构安全，满足风力机基础后续使用安全，可供实际工程参考。 |
| 英文摘要: |
| The wind turbine No. 5, located at a certain wind farm in Hubei Province, has a horizontal deviation of its foundation ring that significantly exceeds the 3 mm threshold prescribed for normal operational parameters. This excessive deviation is attributed to the fatigue damage sustained by the concrete foundation. To correct this deviation, several attempts by lifting the tower section were conducted on-site, all of which were unsuccessful. Subsequently, a holistic foundation lifting and correction scheme was adopted. In this study, a finite element model of a beam-slab foundation was established based on actual engineering conditions. By analyzing and comparing different lifting schemes, the holistic lifting and correction scheme was finally determined, which involved lifting the inclined beams and locally excavating soil at the support end to the edge beam. The horizontal deviation of the foundation ring was corrected from 27 mm to 2.7 mm by this scheme, thereby meeting the normal operating target of 3 mm for wind turbines. During the correction process, a multi-stage lifting loading system was employed, complemented by a synchronous monitoring approach that integrated displacement and leveling measurement systems with surveillance of concrete cracks and strain. This methodology not only achieved precise control of the lifting process, but also ensured structural safety throughout the entire lifting and correction process. It guarantees subsequent safe use of the wind turbine foundations and provides a reference for practical engineering endeavors. |
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