[1] Song Zhanpu, Shi Bin, Zhu Honghu, et al. Construction monitoring of lock head base plateusing distributed optical fibre sensing technique [J]. Journal of Southeast University (English Edition), 2015, 31 (4): 535-540. [doi:10.3969/j.issn.1003-7985.2015.04.018]

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Construction monitoring of lock head base plateusing distributed optical fibre sensing technique()

基于分布式光纤感测技术的闸首底板施工过程监测

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

31

Issue:

2015 4

Page:

535-540

Research Field:

Architecture

Publishing date:

2015-12-30

Info

Title:

Construction monitoring of lock head base plateusing distributed optical fibre sensing technique

基于分布式光纤感测技术的闸首底板施工过程监测

Author(s):

Song Zhanpu¹;  2;  Shi Bin¹;  Zhu Honghu¹;  Shen Mengfen²;  Zhang Dan¹;  Sun Yijie¹

¹School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
²Glenn Department of Civil Engineering, Clemson University, Clemson, SC 29634, USA

宋占璞¹;  2;  施斌¹;  朱鸿鹄¹;  沈梦芬²;  张丹¹;  孙义杰¹

¹南京大学地球科学与工程学院, 南京 210023; ²克莱姆森大学土木工程学院, 美国克莱姆森 29634

Keywords:

construction monitoring;  lock head base plate;  optical fibre sensing;  lock engineering;  concrete

施工监测;  闸首底板;  光纤感测;  船闸工程;  混凝土

PACS:

TU192

DOI:

10.3969/j.issn.1003-7985.2015.04.018

Abstract:

The concrete hydration heat release process of the base plate is monitored using Roman optical time domain reflectometry(ROTDR)sensing sensors. The monitoring data shows that the internal maximum temperature of the base plate is about 54 ℃ after the concrete was cured for 120 h. The fiber Bragg grating(FBG)temperature sensors are adopted to measure the surface temperature of the concrete and the temperature results are used to compensate the data measured by the pulse-prepump Brillouin optical time-domain analyzer(PPP-BOTDA)to obtain the real concrete surface strain of the base plate. The monitoring data is analyzed to obtain a clear understanding of the strain state of the base plate under the effect of concrete hydration heat release. The monitoring results demonstrate the potential of distributed optical fibre sensing techniques as a powerful tool in real-time construction monitoring, and also provide an important insight into the design, construction and maintenance of large hydraulic structures.

底板混凝土施工过程中的水化热释放采用ROTDR温度感测技术监测.监测结果显示, 底板在混凝土浇筑完成120 h后内部温度达到最大值, 最大值为54 ℃.底板混凝土表面温度使用FBG温度传感器监测, 并根据其监测结果对PPP-BOTDA应变监测结果进行温度补偿, 以获得底板上下表层混凝土应变.利用应变监测数据, 分析了闸首底板结构施工过程中由混凝土水化热过程引起的应力、应变变化.研究结果验证了分布式光纤感测技术在船闸等大型水工结构施工安全监测中的可行性, 并对结构设计、工程施工监测和维护具有重要意义.

References:

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Memo

Memo:

Biographies: Song Zhanpu(1989—), male, graduate; Shi Bin(corresponding author), male, doctor, professor, shibin@nju.edu.cn.
Foundation items: The National Key Technology R& D Program during the 12th Five-Year Plan Period(No.2012BAK10B05), the State Key Program of National Natural Science of China(No.41427801).
Citation: Song Zhanpu, Shi Bin, Zhu Honghu, et al. Construction monitoring of a lock head base plate using distributed optical fibre sensing technique[J].Journal of Southeast University(English Edition), 2015, 31(4):535-540.[doi:10.3969/j.issn.1003-7985.2015.04.018]

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