Title Zonation and assessment of frozen- ground conditions for engineering geology along the China-Russia crude oil pipeline route from Mo'he to Daqing, northeastern China
Author Jin Huijun; Hao Jiaqian; Chang Xiaoli; Zhang Jianming; Yu Qi'hao; Qi Jilin; Lu Lanzhi; Wang Shaoling
Author Affil Jin Huijun, Chinese Academy of Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou, China
Source China-Russia crude oil pipeline in permafrost regions in northeastern China, edited by Jin Huijun, G. Gay and M.C. Brewer. Cold Regions Science and Technology, 64(3), p.213-225, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165-232X
Publication Date Dec. 2010
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309513
Index Terms active layer; boreholes; construction; design; earthquakes; ice; moisture; permafrost; pipelines; gas pipelines; soil mechanics; temperature; temperature variations; trenching; variations; vegetation; wetlands; China--Daqing; China-- Mo'he; active faults; Asia; Cenozoic; China; China-Russia oil pipeline; Daqing China; Far East; faults; ground-surface temperature; Mo'he China; northeastern China; petroleum; Quaternary; seasonal variations; zoning
Abstract The China-Russia Crude Oil Pipeline (CRCOP), 813 mm in diameter, is designed to transport 603,000 barrels of Siberian crude oil per day across 1030 km of frozen-ground. About 500 boreholes, with depths of 5 to 20 m, were drilled and cored for analyses, and the frozen-ground conditions were evaluated. After detailed surveys and analyses of the permafrost conditions along the pipeline route, a conventional burial construction mode at a nominal depth of 1.5 m was adopted. This paper discusses the principles and criteria for the zonation and assessment of the frozen-ground environments and conditions of engineering geology for the design, construction, and operation of the pipeline system based on an extensive and in-depth summary and analysis of the survey and exploration data. The characteristics of pipelining crude oil at ambient temperatures in the permafrost regions and the interactive processes between the pipeline and foundation soils were taken into account. Two zones of frozen-ground environment and conditions of engineering geology, i.e., seasonally-frozen- ground and permafrost, were defined on the basis of the regional distribution and differentiations in frozen-ground environments and conditions. Then, four subzones of the permafrost zone were classified according to the areal extent, taking into consideration the temperatures and thicknesses of permafrost, as well as changes in vegetation coverage. In the four subzones, 151 sections of engineering geology were categorized according to the ice/moisture contents of the permafrost, as well as the classes of frost-heaving and thaw- settlement potentials. These 151 sections are comprehensively summarized into four types for engineering construction and operation: good, fair, poor, and very poor, for overall conditions of engineering geology. The zonation, assessment principles and criteria have been applied in the design of the pipeline. They have also been used as the scientific bases for the construction, environmental management, operation and maintenance/contingency plans.
URL http://hdl.handle.net/10.1016/j.coldregions.2009.12.003
Publication Type journal article
Record ID 65006594