基于光纤光栅传感的管道滑坡监测方法研究
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针对铺设在滑坡体内的管道,提出了基于光纤光栅传感的管道滑坡监测方法.阐述了已知管道上三点应力求最大应力的方法.采用温度自补偿式光纤光栅应变传感器监测管体应力,对传感器测量的5.12汶川地震后管体应力数据进行分析.结果表明:地震对滑坡有显著影响,发生了浅层滑动面的较大位移;管体的应力都有显著增长,但总应力水平还低于预警阈值,尚处于安全状态.

关键词

Abstract

In view of pipelines laid in landslide mass,a security monitoring system is proposed.A method for evaluating maximum strain value based on strains of three points on the pipeline is presented.Temperature compensated FBG strain sensors are used in monitoring the strains of pipeline.The strain data of pipeline measured by sensors after 5.12 Wenchuan Earthquake is analyzed.The analysis results show that the earthquake has remarkable impact on landslide,which is proved by large displacement of shallow sliding plane.Strains of the pipeline increase obviously but the total value is less than pre-warning threshold,therefore,the pipeline is under security condition.

补充资料

中图分类号:TP212.14

DOI:10.3788/gzxb20103901.0033

所属栏目:光学传感器

基金项目:国家自然科学基金重点项目(60534050)资助。

收稿日期:2008-12-17

修改稿日期:2009-02-24

网络出版日期:0001-01-01

作者单位    点击查看

胡志新:长安大学 工程机械学院,西安 710064
马云宾:中国石油管道研究中心,河北 廊坊 065000
谭东杰:中国石油管道研究中心,河北 廊坊 065000
陈朋超:中国石油管道研究中心,河北 廊坊 065000
李俊:中国石油管道研究中心,河北 廊坊 065000

联系人作者:胡志新(hzx1965@chd.edu.cn)

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