PSI - Issue 20

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000

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ScienceDirect

Procedia Structural Integrity 20 (2019) 270–277

1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Instrumental methods of examining the underwater crossing of TGPL across the river Lena and evaluating the changes in its stress strain state A.A. Antonov*, D.S. Ivanov, Yu.A. Yakovlev, Z.G. Kornilova V.P. Larionov Institute of the Physical-Technical Problems of the North of the Siberian Branch of the RAS,1 Oktyabrskaya str., Yakutsk 677890, Russia. Abstract The article considers the instrumental methods of examining the underwater crossing of the trunk gas pipeline across the river Lena designed to determine its planned-high-altitude position, on the basis of which the stress-strain state of its elements is calculated. The following instrumental methods of examination are described: profile sounding using the OKO-2 GPR, examination of the river Lena bottom in the area of the underwater gas pipeline using the Hydra 500E side-scan sonar, determination of the actual planned-high-altitude position of the floodplain part of the underwater crossing of TGPL by means of the RD-8000 line locator. Based on the results of monitoring changes in the planned-high-altitude positions of the underwater crossing of the Hatassy-Pavlovsk trunk gas pipeline obtained by these methods, the basis for assessing the dynamics of the stress strain state (SSS) of welded joints are summarized. Further in the article, the main principles of the assessment of the stress-strain state of pipe welded joints of the underwater crossing of TGPL across the river Lena are formulated, combining the results of on sight investigations of the planned-high-altitude position of the gas pipeline. 1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Instrumental methods of examining the underwater crossing of TGPL across the river Lena and evaluating the changes in its stress strain state A.A. Antonov*, D.S. Ivanov, Yu.A. Yakovlev, Z.G. Kornilova V.P. Larionov I stitute of the Physical-Technical Problems of the North of the Siberian Branch of the RAS,1 Oktyabrskaya str., Yakutsk 677890, Russia. Abstract The article considers the i strumental methods of examining the underw ter crossing of the trunk g s pipeline across th river Lena designed to determine its plan ed-high-altitude position, the basis of which th stress-strain state of its elements is calculated. The following instrumental methods of examination r described: profile sounding using the OKO-2 GPR, examination of the river Lena bottom in the area of the underwater gas pipeline using the Hydra 500E side-scan sonar, determination of the actual planned-high-altitude position of the floodplain part of th underwater crossing of TGPL by means of the RD-8000 line locator. Based on the results of monitoring changes in the planned-high-altitude positions of the underwater crossing of the Hatassy-Pavlovsk trunk gas pipeline obtained by these methods, the basis for assessing the dynamics of the stress strain state (SSS) of welded joints are summarized. Further in the article, the main principles of th assessment of the stress-strain state of pipe welded joints of the underwater crossing f TGPL across the river Lena are formulated, combining the results of on sight investigations of the planned-high-altitude position of the gas pipeline.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

Keywords: gas pipeline, underwater crossing, line locator, GPR, sonar, stress-strain state, pipeline, inverted siphon. Keywords: gas pipeline, underwater crossing, line locator, GPR, sonar, stress-strain state, pipeline, inverted siphon.

* Corresponding author. Tel.: +7-924-465-9741 E-mail address: : Santaz7@rambler.ru * Correspon ing author. Tel.: +7-924-465-9741 E-mail address: : Santaz7@rambler.ru

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 2452 3216 © 2019 Th Author(s). Publis d by lsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 10.1016/j.prostr.2019.12.151