基于光纤光栅传感技术的预应力高强混凝土管桩高温高压测试研究  

TESTING STUDY OF PHC PIPE PILES BY HIGH TEMPERATURE AND HIGH PRESSURE BASED ON FIBER BRAGG GRATING SENSING TECHNOLOGY

作　　者：王永洪[1,2] 张明义 朱娜[1] 刘俊伟[1] WANG Yonghong ZHANG Mingyi ZHU Na LIU Junwei(School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China Qindao College of Department of Civil Engineering, Qingdao Technological University, Qingdao 266106, China Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao Technological University, Qingdao 266033, China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛理工大学琴岛学院土木工程系,山东青岛266106 [3]青岛理工大学蓝色经济区工程建设与安全协同创新中心,山东青岛266033

出　　处：《工业建筑》2017年第9期106-109,139,共5页Industrial Construction

基　　金：国家自然科学基金项目(51078196);教育部高等学校博士学科点专项科研基金资助项目(20093721110002)

摘　　要：针对预应力高强混凝土(PHC)管桩高温高压蒸压养护的生产工艺,在3根PHC管桩生产过程中分别绑扎光纤布拉格光栅(FBG)传感器。为了避免温度对FBG传感器的影响,在PHC管桩进蒸压釜之前对FBG传感器光纤尾纤和FC接头采取隔热保护措施,同时在预应力混凝土钢棒上绑扎FBG传感器,进行对比试验。结果表明:如果不采取隔热处理,试验选用的FBG传感器在180℃高温、1 MPa高压下不能存活;采取隔热处理后,植入PHC管桩的FBG传感器存活率极高。FBG温度传感器受高温噪声影响,产生噪声波长,恢复常温后仍无法继续进行桩身温度测试,FBG应变传感器蒸压养护12 h后恢复正常工作,可以用于压桩过程中桩身的应变测试。For PHC pipe pile high-temperature and high-pressure autoclaved curing production process,three piles were banded fiber bragg grating sensor in the production process. FBG sensor tail and FC connector were taken thermal protection measures to avoid the effect of temperature on the FBG sensor. And the FBG sensors were tied to the prestressed concrete steel bars in order to compare with the former test. The test results showed that the FBG sensors were not survival at high temperature of 180 ℃ and high pressure of 1 MPa,due to heat insulation measures was not carried out. On the contrary,FBG sensor survival rate was extremely high after taking heat insulation measures. FBG temperature sensors were affected by high-temperature noise to produce noise wave-length. And after recovery at room temperature,the FBG sensors could not continue the temperature test of the piles. In addition,the operation of FBG strain sensors returned to normal after 12 hours of autoclave and could be used for strain testing of the piles during pressing process.

关 键 词：光纤光栅传感技术 PHC管桩 高温高压 FBG传感器 隔热处理 波长变化 

分 类 号：TU473.13[建筑科学—结构工程]