CAJ | 학술논문

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.
침대포설재활파체내적관도,제출료기우광섬광책전감적관도활파감측방법.천술료이지관도상삼점응력구최대응력적방법.채용온도자보상식광섬광책응변전감기감측관체응력,대전감기측량적5.12문천지진후관체응력수거진행분석.결과표명:지진대활파유현저영향,발생료천층활동면적교대위이;관체적응력도유현저증장,단총응력수평환저우예경역치,상처우안전상태.
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.