Assessment of grouted samples from monopile wind turbine foundations using combined non-destructive techniques
Assessment of grouted samples from monopile wind turbine foundations using combined non-destructive techniques
复制标题
使用组合无损技术评估单桩风力涡轮机基础的灌浆样品
DOI：
10.1016/j.conbuildmat.2015.11.047
复制
发表时间：
2016
影响因子：
7.4
通讯作者：
D. Aggelis
中科院分区：
文献类型：
--
作者：
A. Iliopoulos;D. Hemelrijck;J. Vlassenbroeck;D. Aggelis
绝大多数海上风电场使用单桩基础上的风力涡轮机，以实现具有成本效益的设计。这些基础是由钢和高强度水泥浆组成的复杂结构，水泥浆填满了两根同心钢管之间的环空，这两根钢管被称为单桩和过渡件。由于极端的风和浪的共同作用，在恶劣的近海条件下，灌浆连接可能容易发生结构失效。在施工阶段，已经在几个风电场观察到由于浆液和钢材之间的粘附力减弱而导致过渡件相对于单体桩滑移的灌浆失败。因此，对注浆连接进行彻底的调查是至关重要的。在这项研究中，从多达四个海上风力涡轮机中采集了大量的胶凝岩芯。对样品进行了超声脉冲速度(UPV)、无损检测(NDT)和压缩试验，同时对一小部分样品进行了X射线分析。本文介绍了联合使用UPV和X射线技术的结果以及与抗压强度结果的关系，并批判性地讨论了将该技术用于现场应用的可能性。据作者所知，这些技术第一次被应用于评估海上风力机在单桩基础上的注浆连接。
The vast majority of offshore wind farms uses wind turbines on monopile foundations for cost effective designs. These foundations are complex structures consisting of steel and a high strength cementitious grout that fills the annulus between the two concentric steel pipes known as monopile and transition piece. The grouted connection is potentially prone to structural failures when subjected to harsh offshore conditions due to combinations of extreme wind and wave excitations. Already grouting failures related to slippage of the transition piece relative to the monopile due to weakening of the adhesion between the grout and the steel have been observed at several windfarms during the construction phase. Therefore, a thorough investigation of the grouted connection is of utmost importance. In this study, a large population of cementitious cores were sampled from as many as four offshore wind turbines. The samples were subjected to Ultrasonic Pulse velocity (UPV) non-destructive testing (NDT) and compression testing while a smaller set of samples was subjected to X-ray analysis as well. This paper presents the results of the combined use of the UPV and X-ray techniques as well as correlations with compressive strength results and critically discusses the possibility of using the techniques for in situ application. To the authors’ knowledge it is the first time that these techniques are applied for assessment of the grouted connection of offshore wind turbines on monopile foundations.
影响因子：
7.4
作者：
Kocur, Georg Karl;Saenger, Erik H.;Vogel, Thomas
通讯作者：
Vogel, Thomas