铁道科学与工程学报2024，Vol.21Issue(2)：860-872,13.DOI:10.19713/j.cnki.43-1423/u.T20230533
基于压电原理的装配式结构套筒灌浆饱满度检测方法研究
Research on the testing method for grouting plumpness of prefabricated structural sleeve based on piezoelectric principle
摘要
Abstract
In order to solve the technical challenges of high cost and difficulty in real-time detection of the sleeve grouting fullness in prefabricated structures,the detection method and device based on the piezoelectric testing principle were developed,and relevant material tests,model tests,and engineering applications were carried out.First,the influence of grouting material type and setting time on the piezoelectric test results was investigated by electrical properties test of grouting materials.Then,the effectiveness of the piezoelectric method for testing grout leakage defects was analyzed through the grouting-leakage cycle test of transparent sleeves.Furthermore,through prefabricated model tests,the threshold of the piezoelectric method for judging the grouting plumpness was determined.Finally,relying on the prefabricated bridge project of the connecting line between Dongxiao South Road and Guangzhou South Railway Station,the effectiveness and practicality of the piezoelectric method for testing grouting plumpness were verified.The research results show that the resonant voltage measured by the piezoelectric sensor is significantly reduced after being buried in the grouting material,and the voltage value generally remains stable within 60 minutes.Afterwards,as the setting time increases,the voltage value increases and gradually approaches the initial voltage value before the test.In the grouting-leaking cycle test,whether the sensor is laid horizontally or vertically,the resonant voltage shows obvious changes,indicating that the piezoelectric method is less affected by the sensor laying mode.For the case of full grouting in the sleeve,the ratio of the measured voltage to the initial voltage before grouting is less than 0.4,which can be used as the threshold for judging the grouting plumpness.The engineering application results indicate that the piezoelectric method is convenient for field operation,can guide on-site grouting for defective sleeves,and meet the quality control requirements during the grouting process of prefabricated structural sleeves.The research results provide a new approach and practical reference for solving the quality detection problem of sleeve grouting.关键词
装配式结构/灌浆套筒/灌浆饱满度/压电法/模型试验/工程应用Key words
prefabricated structure/grouting sleeve/grouting plumpness/piezoelectric method/model test/engineering application分类
建筑与水利引用本文复制引用
杜永潇,孙晓立,杨军,全涌,卞德存..基于压电原理的装配式结构套筒灌浆饱满度检测方法研究[J].铁道科学与工程学报,2024,21(2):860-872,13.基金项目
中国博士后科学基金资助项目(2022M720898) （2022M720898）
广州市建筑集团有限公司科技计划项目([2022]-KJ023) （[2022]-KJ023）
广东省住房和城乡建设厅2020年科技计划项目(2020-K9-083374) （2020-K9-083374）
广州市建筑科学研究院集团有限公司科技进步资金资助项目(2024Y-KJ08) （2024Y-KJ08）
