CAJ | 학술논문

本文采用拉曼散射光时域反射（ROTDR）光纤测温技术监测船闸工程闸首底板大体积混凝土浇筑水化热释放过程中混凝土结构内部的温度变化，采用布拉格光栅（FBG）光栅测温技术监测混凝土表层的温度变化。监测结果表明，结构尺寸为14.8m×29.2m×3m的底板在混凝土浇筑完成第5d时内部温度后达到最大值，最大值为54.5℃，底板混凝土上、下表层的温度达到最大值时间相对较晚；在混凝土浇筑完成第6d时上表层温度达到最大值46.7℃；在混凝土浇筑完成第10d时下表层温度达到最大值46.5℃。根据监测结果，综合分析了混凝土水化热释放过程，并验证了ROTDR和FBG技术应用于大体积混凝土浇筑水化热温度场变化过程监测的可行性。研究成果对于完善分布式光纤温度感测技术，优化船闸工程结构的设计、施工和维护具有重要意义。
본문채용랍만산사광시역반사（ROTDR）광섬측온기술감측선갑공정갑수저판대체적혼응토요축수화열석방과정중혼응토결구내부적온도변화，채용포랍격광책（FBG）광책측온기술감측혼응토표층적온도변화。감측결과표명，결구척촌위14.8m×29.2m×3m적저판재혼응토요축완성제5d시내부온도후체도최대치，최대치위54.5℃，저판혼응토상、하표층적온도체도최대치시간상대교만；재혼응토요축완성제6d시상표층온도체도최대치46.7℃；재혼응토요축완성제10d시하표층온도체도최대치46.5℃。근거감측결과，종합분석료혼응토수화열석방과정，병험증료ROTDR화FBG기술응용우대체적혼응토요축수화열온도장변화과정감측적가행성。연구성과대우완선분포식광섬온도감측기술，우화선갑공정결구적설계、시공화유호구유중요의의。
This paper uses the Raman Optical Time Domain Reflectometer(ROTDR)and Fiber Bragg Gratting (FBG)to monitor the hydration heat of large base-slab concreting for ship lock.The base-slab is 14.8m wide, 29.2m long and 3m thick.The monitoring shows the following results.The peak temperature in core of the concrete block thick can reach 54.5℃at the 5th day after the concreting.The surface temperature can reach the peak temperature 46.7℃at the 6th day.According to the monitoring results,a comprehensive analysis of concrete hydration heat release process is carried out to verify the feasibility of ROTDR and FBG to be used in monitoring the hydration temperature field changes during mass concreting.These results can provide reliable data for appraisal of safety and stability of the ship lock.