17 years of thaw penetration and surface settlement observations in permafrost terrain along the Norman Wells pipeline, Northwest Territories, Canada

被引：0

作者：

Burgess, MM ^{[1
]}

Smith, SL ^{[1
]}

机构：

[1] Geol Survey Canada, Nat Resources Canada, Ottawa, ON, Canada

来源：

PERMAFROST, VOLS 1 AND 2 | 2003年

关键词：

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Norman Wells pipeline is the first buried oil pipeline in the permafrost zone of Canada. Ground temperature observations from 5 sites, typical of the permafrost conditions along the 869 km route, indicate that thaw continues to progress beneath the right-of-way (ROW) after 16-17 years. Thaw depths observed on-ROW in 2001 ranged from 3 to 5 in at lacustrine and organic sites, and from 5 to >7 m at coarse mineral soils sites. Associated surface settlements are, for (i) fine-grained lacustrine soils: 0.4-0.7 m on-ROW, 0.3 in off-ROW, (ii) coarse-grained tills: 0.1-0.35 in on-ROW, and (iii) organic terrain: 0.7 in on-ROW. Within the trench, thaw settlement may be greater than I m in lee-rich mineral and organic soils. Cumulative thaw strains on-ROW are 10-20% for fine-grained mineral soils, 2-10% for coarse-grained mineral soils, and 30% for organic soils.

引用

页码：107 / 112

页数：6