Состояние бугров пучения в районе эксплуатации магистрального газопровода Надым – Пунга

Abstract

The current strategy for the economic development of the Russian Federation is largely related to extraction, transportation and processing of mineral raw materials. The fuel and energy resources are particularly important. The main big and largest deposits of natural gas and oil are located in the zone of distribution of permafrost, which requires specific technologies for working in these areas. At the same time, there are needed long-term observations of the state of individual components of the cryolithozone, and generally beyond it. Most cryogenic processes and phenomena negatively affect the condition of residential and technical facilities located on its territory. One of these processes is frost mounds, which present a serious problem, and in some cases a danger in the construction and operation of engineering structures in the permafrost zone. The model area of the study selected a watershed section 30 km south-east of the city of Nadym, where it was studied the structure of two frost mounds during the field season in 2016. They are located on one mesoform of the relief – on the watershed. The first frost mound is composed of loam and has a powerful peat horizon, in contrast to which the second frost mount consists mainly of ferruginous sand and sandy loam. The difference in the granulometric composition of investigated mounds is due to the heterogeneity of the lithological composition of the territory, which is a consequence of the complex history of the development of this region. Frost mounds are well decoded in space images which allow them to be allocated remotely in remote areas of operation of linear hydrocarbon transportation facilities.

Представлены результаты исследования особенностей морозного пучения и связанных с ним форм рельефа в районе магистрального газопровода Надым – Пунга северотаежной подзоны Западной Сибири.