Seasonal deformations under a road embankment on degrading permafrost in Northern Canada

被引：6

作者：

Kurz, David ^{[1
]}

Flynn, David ^{[1
]}

Alfaro, Marolo ^{[2
]}

Arenson, Lukas U. ^{[2
,3
]}

Graham, Jim ^{[2
]}

机构：

[1] KGS Grp, Winnipeg, MB, Canada

[2] Univ Manitoba, Civil Engn Dept, Winnipeg, MB, Canada

[3] BGC Engn Inc, Vancouver, BC, Canada

来源：

ENVIRONMENTAL GEOTECHNICS | 2020年 / 7卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

environmental engineering; fabric; structure of soils; transport planning; WATER;

D O I：

10.1680/jenge.17.00036

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Permafrost degradation is a major concern in cold regions that are warming because of climate change. To assist in understanding the process, ground temperatures, lateral and vertical deformations and groundwater pressures were measured for 6 years under a road embankment in northern Manitoba, Canada. The road surface requires ongoing maintenance due to irregular settlements. The field data allowed the calibration of numerical modelling that related deformations to ground temperatures. It confirmed the presence of remnant permafrost under the centre of the embankment, but none under the midslope or toe. This 'frost bulb' plays an important role in the ground thermal regime, the groundwater pressures, the observed deformations and, ultimately, necessary road maintenance.

引用

页码：163 / 174

页数：12

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