This work was supported by the National Natural Science Foundation for Young Scientists of China (Grant no. 51204098), the Natural Science Foundation of Hunan (2021JJ30575). The authors are very grateful for the financial contributions and convey their appreciation to the organizations for supporting this basic research.
机构署名：
本校为第一且通讯机构
院系归属：
土木工程学院
摘要：
Anchors constitute a common form of structural support in geotechnical engineering. Precise identification of ultra-early-stage (UES) anchoring quality is crucial to ensure the integrity of the secondary lining. To address grout defects in the UES of anchors, a calculation method for UES anchor wave velocity was introduced. Indoor experiments and numerical simulations were conducted for non-destructive testing (NDT) of anchors in the UES, analyzing time-domain waveform characteristics and wave velocity variations. A method for identifying grout defects in the UES of anchors was proposed. The r...
