分布式光纤传感技术在岩溶段桩基检测中的应用研究  

Application of Distributed Optical Fiber Sensing Technology in Pile Foundation Detection in Karst Section

作　　者：姚正斐 YAO Zhengfei(China Railway 22^(nd) Bureau Group Co.Ltd.,Beijing 100043,China)

机构地区：[1]中铁二十二局集团有限公司,北京100043

出　　处：《铁道建筑技术》2022年第1期92-96,共5页Railway Construction Technology

基　　金：中铁二十二局集团有限公司科技研发计划项目(19-10B)。

摘　　要：分布式光纤传感技术近年来广泛应用于土木工程领域,该技术具有分布式测量、耐久性好、施工方便等优点。本文将此技术应用于岩溶区灌注桩检测,研究岩溶区灌注桩荷载传递规律和桩身附近溶洞存在位置,通过钢筋应力计测量结果验证了光纤传感技术在岩溶区灌注桩检测中应用的可行性。结果表明,该技术可实现岩溶区灌注桩完整性的分布式检测功能,并能判断桩身周围溶洞存在位置区间。相对于钢筋应力计、应变片等传统的检测方法,分布式光纤传感技术具有更高的检测精度和更广的测量范围。Distributed optical fiber sensing technology is widely used in the field of civil engineering in recent years.It has the advantages of distributed measurement,good durability and convenient construction.In this paper,the author applies this technology to the detection of cast-in-place piles in karst area,studies the load transfer law of cast-in-place piles in karst area and the location of karst caves near the pile body,and verifies the feasibility of the application of optical fiber sensing technology in the detection of cast-in-place piles in karst area through the measurement results of reinforcement stress meter.The results show that this technology can realize the distributed detection function of the integrity of cast-in-place piles in karst area,and can judge the location interval of karst caves around the pile body.Compared with the traditional detection methods such as reinforcement stress meter and strain gauge,distributed optical fiber sensing technology has higher detection accuracy and wider measurement range.

关 键 词：分布式光纤传感技术 灌注桩 荷载传递规律 溶洞 

分 类 号：TU473.16[建筑科学—结构工程]