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小直径盾构隧道施工过程中管片结构应力监测

Stress Monitoring of Segment Structure during the Construction of the Small-Diameter Shield Tunnel.

作者信息

Ding Liang, Sun Yi-Jie, Zhang Wen-Zhi, Bi Gang, Xu Hong-Zhong

机构信息

North China Municipal Engineering Design & Research Institute Co., Ltd., Tianjin 300074, China.

College of Transportation Science and Engineering, Nanjing Tech University, Nanjing 210009, China.

出版信息

Sensors (Basel). 2023 Sep 22;23(19):8023. doi: 10.3390/s23198023.

DOI:10.3390/s23198023
PMID:37836853
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10574987/
Abstract

Segmental stress during the construction process plays a pivotal role in assessing the safety and quality of shield tunnels. Fiber Bragg grating (FBG) sensing technology has been proposed for tunnel segment stress monitoring. A laboratory test was conducted to validate the reliable strain measurement of FBG sensors. The field in situ monitoring of a sewerage shield tunnel was carried out to examine the longitudinal and circumferential stresses experienced by the segments throughout the construction phase. The cyclic fluctuations in stress were found to be synchronized with the variations in shield thrust. A comparison was made between the longitudinal and circumferential stress variations observed during the shield-driving and segment-assembly processes. Additionally, the time required for the grouting to reach its full curing strength was estimated, revealing its impact on the stress levels and range of the pipe segment. The findings of this study offer an enhanced understanding of the stress state and health condition of small-diameter shield tunnels, which can help in optimizing the design and construction process of tunnel segments, as well.

摘要

施工过程中的管片应力在评估盾构隧道的安全性和质量方面起着关键作用。已提出采用光纤布拉格光栅（FBG）传感技术进行隧道管片应力监测。开展了室内试验以验证FBG传感器可靠的应变测量。对一条污水盾构隧道进行了现场监测，以检测管片在整个施工阶段所承受的纵向和环向应力。发现应力的周期性波动与盾构推力的变化同步。对盾构推进和管片拼装过程中观察到的纵向和环向应力变化进行了比较。此外，估算了浆液达到完全固化强度所需的时间，揭示了其对管片应力水平和范围的影响。本研究结果有助于加深对小直径盾构隧道应力状态和健康状况的理解，也有助于优化隧道管片的设计和施工过程。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/f9949704dd55/sensors-23-08023-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/e425fb1fdf14/sensors-23-08023-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/48d7ee270681/sensors-23-08023-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/be746627182e/sensors-23-08023-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/7ffdc090a94f/sensors-23-08023-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/670296d044f5/sensors-23-08023-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/9003006ec74f/sensors-23-08023-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/db132f62d10e/sensors-23-08023-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/4df957e0f256/sensors-23-08023-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/9829032d88f1/sensors-23-08023-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/f9949704dd55/sensors-23-08023-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/e425fb1fdf14/sensors-23-08023-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/3d559b4e15a6/sensors-23-08023-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/aab462085c9a/sensors-23-08023-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/db61617ecf9e/sensors-23-08023-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/48d7ee270681/sensors-23-08023-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/be746627182e/sensors-23-08023-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/7ffdc090a94f/sensors-23-08023-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/670296d044f5/sensors-23-08023-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/9003006ec74f/sensors-23-08023-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/db132f62d10e/sensors-23-08023-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/4df957e0f256/sensors-23-08023-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/9829032d88f1/sensors-23-08023-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6277/10574987/f9949704dd55/sensors-23-08023-g013.jpg

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