风机混凝土扩展基础施工冷缝缺陷检测与评估技术  

Detection and evaluation technology for construction joints of wind turbine foundation

作　　者：黄昊[1] 吕小彬[1] 李萌[1] 邵薇薇[1] 

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038

出　　处：《中国水利水电科学研究院学报》2013年第3期232-235,共4页Journal of China Institute of Water Resources and Hydropower Research

基　　金：水利部“948”项目(201301)

摘　　要：风机混凝土扩展基础结构具有大体积、钢筋分布密集等特点,加之现场施工条件的局限,常会出现施工冷缝和蜂窝孔洞等施工缺陷,为结构安全运营造成严重的安全隐患。针对这些施工缺陷,目前尚无成熟的检测和评估方法。本研究在充分考虑风机基础混凝土结构特点的基础上,首次将国内外较先进的混凝土冲击回波检测技术应用于风机基础混凝土检测领域,结合小范围钻芯取样验证的方法,确定了基础施工缺陷;并参照美国混凝土结构设计标准ACI318-2008的方法对风机混凝土扩展基础结构的安全性进行评价。实践证明冲击回波检测与钻芯取样相配合可以应用于风机混凝土现场缺陷检测。The concrete foundation structure of wind turbine has the characteristics of large volume and dense reinforced distribution. Due to the limitations of site conditions, many defects forming during the con- struction, such as the construction joint and honeycomb hole, threaten the structural operation safety. Nowa- days, there is no effective method in this field for measurement and evaluation. With full consideration of structural characteristics, the impact-echo technique was introduced and applied to determine the concrete construction defects of the wind turbine foundation, which has been combined with the method of drilling core sample to validate. In light of the America concrete structure design standard ACI318-2008 method, the structure safety of wind turbine concrete foundation is evaluated. It is proved that the impact echo detec- tion combined with core sampling can be applied to the detection of construction defects of the wind tur- bine foundation.

关 键 词：风机 混凝土 扩展基础 缺陷 冲击回波 

分 类 号：TU755[建筑科学—建筑技术科学]