Abstract
The article explores the issues concerning safety enhancement of pipeline active fault crossing on Sakhalin Island. Based on the complexity and analysis results, all the faults crossed by pipeline system are classified into five categories - from very simple faults to extremely complex ones. The pipeline fault crossing design is developed in accordance with the fault category. To enhance pipeline safety at fault crossing, a set of methods should be applied: use of pipes of different safety classes and special trench design in accordance with soil permeability characteristics.
Highlights
The TransSakhalin pipeline system passes through the areas characterized by complex geological setting and high natural risks
It stretches the areas of high seismic activity – up to 9-10 earthquake intensity (MSK)
It is of particular importance to develop a set of methods aimed at enhancing oil trunk pipeline safety, especially in those areas where it crosses the active faults [2]
Summary
The TransSakhalin pipeline system passes through the areas characterized by complex geological setting and high natural risks. It stretches the areas of high seismic activity – up to 9-10 earthquake intensity (MSK). It is not always possible to avoid active fault crossing. This presents a significant hazard, as earthquakes are more likely to occur along the faults, and displacements can be up to several meters. Active faults are those faults which have moved at least once over the past 10-11 thousand years. The Sakhalin-II pipeline system crosses seismic zones of Central-Sakhalin and Hokkaido-Sakhalin faults.
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