华电技术 ›› 2016, Vol. 38 ›› Issue (8): 34-36.

• 技术交流 • 上一篇    下一篇

风电塔筒P&H基础预应力高强锚杆断裂分析

  

  1. 1.华电郑州机械设计研究院有限公司,郑州〓450015;2.华电福新能源股份有限公司,北京〓100031
     
  • 出版日期:2016-08-25 发布日期:2016-10-31

Wind power tower P&H prestress high strength anchor bolt fracture analysis

  1. 1.Huadian Zhengzhou Mechanical Design Institute Company Limited, Zhengzhou 450015, China; 2.Huadian Fuxin Energy Corporation Limited, Beijing 100031, China
  • Online:2016-08-25 Published:2016-10-31

摘要:

摘要:华南某风电项目数台风机P&H波纹筒预应力管桩基础安装一段时间后出现了锚杆断裂情况,引起机组停机,基础需返修或重建,造成了很大的经济损失。对断裂锚杆进行了宏观和微观分析,确定锚杆断裂原因是材料塑韧性不够,在内部存在较多缺陷和杂质的情况下出现局部应力集中,引起裂纹并不断扩张,最终导致断裂。探讨了材料选用标准,并对同类工程提出了建议。

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Abstract:

Abstract:Anchor bolts for a wind power plant’s P&H prestress pile foundation were fractured after installation. Units were forced to stop, foundation need repair or rebuilt, and caused enormous economic losses. Macroscopic and microcosmic analysis were made, and confirmed that the fracture was caused by insufficient material toughness. Due to inner defect and impurities, stress concentrated partially, and caused crack extended, finally fracture. Material selection standard was discussed, advises were provided for similar projects. 

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