分布式传感光纤测量疏浚土大型充填袋变形

发布时间：2018-05-28 22:00

本文选题：分布式光纤传感技术 + 大型疏浚土充填袋　；参考：《水利水运工程学报》2014年05期

【摘要】：港工建设中采用航道疏浚土作为新型筑堤材料的关键技术研究,对于解决资源短缺和环境制约等问题具有重要意义。由于无法应用传统点式监测技术测量充填袋充填、加载中袋体的受力及变形过程,针对高含泥量疏浚土大型充填袋袋体受力及变形监测等工程实践问题,通过室内标定试验和现场原型试验,开展了传感光纤选型、胶结固定及保护方式、测量精度及误差分析、工程原型应用测试等分布式光纤传感技术应用于高含泥量疏浚土大型充填袋受力及变形测量的可行性研究。试验研究表明,疏浚土大型充填袋袋体受力及变形监测中应选用柔性护套应变传感光纤,以柔性胶固定;选择合适的传感光纤能够使袋体受力及变形的测量精度达到±30με,监测空间分辨率0.1 m,最大应变测量范围30 000με;分布式光纤传感技术是疏浚土大型充填袋袋体受力及变形监测的可靠新型测量方法。
[Abstract]:The research on the key technology of using channel dredged soil as a new type of dike material in port construction is of great significance to solve the problems of shortage of resources and environmental constraints. Because the traditional point monitoring technique can not be used to measure the loading and deformation process of the bag in the loading process, aiming at the engineering practice problems such as the stress and deformation monitoring of the large bag filled with dredged soil with high content of mud, etc. Through indoor calibration test and field prototype test, the selection of sensing fiber, fixation and protection mode, measurement precision and error analysis are carried out. The application of distributed optical fiber sensing technology such as prototype testing is applied to the feasibility of measuring the force and deformation of large filling bags of dredged soil with high content of mud. The experimental results show that flexible sheathed strain sensing fiber and flexible glue should be used to monitor the stress and deformation of the large filled bag body of dredged soil. Choosing suitable sensing fiber can make the measuring accuracy of bag body force and deformation reach 卤30 渭蔚, monitoring spatial resolution 0.1 m, maximum strain measuring range 30 000 渭蔚. Distributed optical fiber sensing technology is the force and change of large filled bag body of dredged soil. A new reliable measuring method for shape monitoring.
【作者单位】：南京水利科学研究院;
【基金】：国家高新技术研究发展计划(863计划)资助项目(2012AA112509)
【分类号】：U654

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