CAJ | 학술논문

滑坡灾害是浅埋输油气管道的主要风险源之一,监测预警是管道滑坡风险控制的重要手段.管道滑坡灾害的监测预警需要滑坡体和管道的联合监测,注重管体轴向应变监测.为获得管道轴向应变的准确值,每截面至少需要布置3个应变计.推导了已知截面上3点、9点、12点钟位置应力时,管体监测截面上任意点应力的计算方法;探讨了基于材料强度破坏的管道预警阈值的确定方法.汶川地震期间,在兰成渝成品油管道羊木山滑坡获得了成功应用,为管道滑坡灾害监测预警的推广提供了借鉴.
활파재해시천매수유기관도적주요풍험원지일,감측예경시관도활파풍험공제적중요수단.관도활파재해적감측예경수요활파체화관도적연합감측,주중관체축향응변감측.위획득관도축향응변적준학치,매절면지소수요포치3개응변계.추도료이지절면상3점、9점、12점종위치응력시,관체감측절면상임의점응력적계산방법;탐토료기우재료강도파배적관도예경역치적학정방법.문천지진기간,재란성투성품유관도양목산활파획득료성공응용,위관도활파재해감측예경적추엄제공료차감.
Landslide is one of the most serious threats to the shallow-buried pipeline. Monitoring and early-warning is an important measure to control landslide risk. Pipeline landslide monitoring should consider both the hazard and the pipe. More attention should be taken into the monitoring of pipe' s longitudinal strain. To completely define the longitudinal strain in the pipeline at one strain gauge station, at least three strain gauges were needed. And the calculation formula was derived from the condition that three gauges were placed in 12 o'clock, 3 o'clock and 9 o'clock positions. A method to determine the early-warning threshold value was discussed. An example of pipeline landslide monitoring successfully applied in Yangmu landslide of Lanchengyu product pipeline during the Wenchuan earthquake gave a useful reference to popularize application of monitoring and early-warning.