ASSESSMENT OF ENGINEERING AND GEOCRYOLOGICAL CONDITIONS OF THE TERRITORY OF THE OPERATED PIPELINE ROUTE ON THE MALKHOYAKHA-PUR INTERFLUVE

Abstract

Link for citation: Filimonov A.A., Strokova L.A. Assessment of engineering and geocryological conditions of the territory of the operated pipeline route on the Malkhoyakha–Pur interfluve. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 6, рр.163-175. In Rus. The relevance of the work is determined by the importance of trouble-free operation of pipeline transport facilities located in the permafrost zone. Manifestations of dangerous engineering and geological processes during the operation of an underground pipeline can lead to changes in the permafrost soil-pipeline system, which will entail the occurrence of off-design loads on the pipeline body, pipeline failures and accidents. It is required to analyze the activation and development of dangerous geological processes along the pipeline route in order to correctly assess changes in engineering and cryological conditions during pipeline operation. The main aim is to rank sections of the route with developing hazardous geological processes and to identify their impact on the conditions for the further operation of the facility. Methods: analysis of the results of engineering surveys on the object of study and geotechnical monitoring data of the oil and condensate pipeline; evaluation methods for zoning sections of the route. Results. At the first stage of the study, the route was classified, the study areas were identified, and criteria were determined for assessing active hazardous geological processes using the scoring method. At the second stage, the zoning model was determined, the boundary criteria γ (the proportion of identified hazardous geological processes for the section of the route) were designated, taxa were designated, sections of the route were ranked in accordance with the zoning model. The most vulnerable sections of the oil and condensate pipeline route from the point of view of the manifestation of geological processes were identified.

Keywords

• zoning
• engineering-geological conditions
• dangerous geological processes
• underground pipeline
• permafrost soils