Characteristics of thawed interlayer and its effect on embankment settlement along the Qinghai-Tibet Railway in permafrost regions

被引：0

作者：

SUN Zhizhong ^{[1
]}

MA Wei ^{[1
]}

ZHANG Shujuan ^{[1
]}

MU Yanhu ^{[1
]}

YUN Hanbo ^{[1
,2
]}

WANG Honglei ^{[1
,3
]}

机构：

[1] State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences

[2] Beiluhe Observation and Research Station on Frozen Soil Engineering and Environment in Qinghai-Tibet Plateau, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences

[3] University of Chinese Academy of Sciences

来源：

JournalofMountainScience | 2018年 / 15卷 / 05期

关键词：

In-situ monitoring; Qinghai-Tibet Railway; Embankment settlement; Thawed interlayer;

D O I：

暂无

中图分类号：

U213.14 [];

学科分类号：

081401 ;

摘要：

The formation of thawed interlayer beneath embankment can result in embankment settlement in permafrost regions. Based on the data on ground temperatures and deformations beneath the embankment, observed in-situ along the QinghaiTibet Railway in permafrost regions from 2006 to2013, characteristics of the thawed interlayer beneath the embankment and its influence on the embankment settlement are studied. The results indicate that the thawed interlayer hardly forms beneath the natural field, and beneath the embankments from the Qinghai-Tibet Railway the thawed interlayer develops widely, and it can be refrozen totally in the regions with lower mean annual ground temperature, and developed further in the regions with higher mean annual ground temperature.The thawed interlayer is closely related to the embankment settlement. The ice content of permafrost underlying the thawed interlayer influences the settlement of embankment. The higher the ice content is, the larger the settlement is, and vice versa. The increase in thickness of thawed interlayer mainly results from the decline of artificial permafrost table in high-temperature permafrost regions.

引用

页码：1090 / 1100

页数：11

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