摘   要：为了研究单芯、四芯微应变传感光缆监测预应力钢筒混凝土管（PCCP）内压的效果，设计了基于布里渊光时域分析（BOTDA）技术的PCCP外缠光缆试验装置，测量了升压、降压过程中的布里渊频移及其变化量，并进行了管外壁形变测量的位置标定和重复性试验。结果表明：单芯、四芯微应变传感光缆的布里渊频移与管内压大小呈正相关关系；微应变传感光缆在不同位置测量同一形变具有高重复性，且测量结果灵敏度较高，无迟滞效应，能够有效监测PCCP内压变化情况。 Abstract: In order to study the effectiveness of single-core and four-core micro-strain sensing optical cables on monitoring the internal pressure of prestressed concrete cylinder pipe (PCCP), a PCCP wrapped optical cable test device based on Brillouin optical time domain analysis(BOTDA) technology was developed. The Brillouin frequency shift and its variation during the process of voltage boost and reduction were measured, and the position calibration and repeatability test of the outer wall deformation measurement for the pipe were carried out. The results show that the Brillouin frequency shift of single-core and four-core micro-strain sensing optical cables is positively correlated with the internal pressure. Micro-strain sensing optic cables have high repeatability in measuring the same deformation at different positions, and the measurement results have high sensitivity and no hysteresis effect, indicating that the optic cables can effectively monitor the changes in PCCP internal pressure.

李涛,宋涛,李渊,等.基于BOTDA技术的微应变传感光缆监测PCCP内压试验[J].混凝土与水泥制品,2025(4):42-48. LI T,SONG T,LI Y,et al.Micro-strain sensing optical cable monitoring PCCP internal pressure based on BOTDA technology[J].China Concrete and Cement Products,2025(4):42-48.

陈克伟，陈春保，张芳芳.销钉式抗拔先张法预应力混凝土管桩抗拉性能试验研究[J].混凝土与水泥制品,2025(4):49-53,59. CHEN K W,CHEN C B,ZHANG F F.Experimental study on tensile performance of pin-type anti-pull pretensioned spun concrete piles[J].China Concrete and Cement Products,2025(4):49-53,59.