| Autor: |
Yu. A. Yakovlev, A.A. Antonov, A.L. Tereshkin, Z.G. Kornilova |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Procedia Structural Integrity. 30:11-16 |
| ISSN: |
2452-3216 |
| DOI: |
10.1016/j.prostr.2020.12.003 |
| Popis: |
The problems of ensuring the operational reliability of underwater crossings for the main transmission of oil and gas are of great importance since failures and accidents on them far exceed similar incidents on the linear part by their economic and environmental consequences. The article describes the determination of the planned-high-altitude position of the lines-I and -II of the underwater crossing of MGL across the Lena river on floodplain areas from the right and left banks by the method of sounding the pipeline with the RD-8000 line locator. The changes in the stress-strain state of the pipeline are defined by monitoring the spatial position with instrumental inspection methods. Based on the survey results, graphs were constructed according to the Baltic system of heights, where the surface of the earth’s relief and the main gas pipeline are indicated. The results of field examinations of the I and II lines show that the pipe of the underwater crossing goes almost parallel with the surface relief. No pronounced elevation differences, gullies, and channels are observed on the islands from the right bank of the riverbank. However, there is a change in the planned-high-altitude position of the underwater gas pipeline. A significant change in the planned-high-altitude positions of the I-st and II-nd line siphons of the underwater gas pipeline in the area of the Haptagay channel has been revealed compared to the earlier locations. As a result of such deterioration, the lines can completely freeze in the winter period, and the stiffness of their jamming strengthens. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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