多年冻土地基正温输气管道地温场实测及分析

doi:10.7522/j.issn.1000-0240.2019.0030

冰川冻土 ›› 2019, Vol. 41 ›› Issue (4): 865-874.doi: 10.7522/j.issn.1000-0240.2019.0030

多年冻土地基正温输气管道地温场实测及分析

施瑞^1,2, 徐震³, 刘德仁⁴, 蒋代军⁴, 王旭⁴, 胡渊⁴, 温智^1,4

1. 中国科学院西北生态环境资源研究院冻土工程国家重点实验室, 甘肃兰州 730000;
2. 中国科学院大学, 北京 100049;
3. 中石油天然气股份有限公司西部管道分公司, 新疆乌鲁木齐 830013;
4. 兰州交通大学土木工程学院, 甘肃兰州 730070

收稿日期:2018-08-16 修回日期:2019-04-23 出版日期:2019-08-25 发布日期:2019-11-28
通讯作者: 王旭,E-mail:publicwang@163.com. E-mail:publicwang@163.com
作者简介:施瑞(1991-),男,甘肃兰州人,2015年于哈尔滨工业大学获得学士学位,现为中国科学院西北生态环境资源研究院在读博士研究生,从事寒区岩土工程领域的研究.E-mail:1113300427@hit.edu.cn
基金资助:
中石油重大研究项目“高海拔岛状多年冻土区涩宁兰输气管道变形机理及病害防治技术”（XG11-2015-002）；国家自然科学基金项目（51268033；41771073）；冻土工程国家重点实验室开放基金项目（SKLFSE201607）资助

Measurement and analysis of the ground temperature field with positive temperature gas pipeline in permafrost regions

SHI Rui^1,2, XU Zhen³, LIU Deren⁴, JIANG Daijun⁴, WANG Xu⁴, HU Yuan⁴, WEN Zhi^1,4

1. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resource, Chinese Academy of Science, Lanzhou 730000, China;
2. University of Chinese Academy of Science, Beijing 100049, China;
3. Western Pipeline Branch of Petro China Company Limited, Urumqi 830013, China;
4. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Received:2018-08-16 Revised:2019-04-23 Online:2019-08-25 Published:2019-11-28

摘要/Abstract

摘要： 我国有多条油气管道位于多年冻土地区，工程问题层出不穷。因输送介质处于正温状态，其所释放热量对管道周围冻土冻融过程有极大影响。为阐明正温管道对多年冻土温度场及冻融特征的影响，基于西部某多年冻土区正温输气管道现场实验，对管道地基温度场进行了为期1年的现场实测。数据分析表明，多年冻土天然上限为1.5~2.0 m；土体融化期及冻结期分别为6-10月、11-次年5月；监测段多年冻土热量收支基本平衡，属于不稳定冻土，在外界热扰动下极易退化；正温输气管道的存在引起了多年冻土的退化且对其温度场有很大影响，水平方向影响范围约1.5 m，管下最大融深可达7.0 m。同时指出了针对处于临界状态的多年冻土，在基于对其全面、深入了解的基础上，越早考虑相关工程建设带来的热扰动对多年冻土的不利影响，则处置难度越低且损失越小。

关键词: 多年冻土, 正温输气管道, 地温场, 冻融过程, 实测分析

Abstract: There are lots of oil-gas pipelines located in the cold regions of China,following with numerous engineering problems. Due to medium pumped usually have positive temperatures,the heat released from pipelines have a significant impact on the freeze-thaw process of the soil around pipes. Based on the field experiments on a positive temperature gas pipeline located in the permafrost of western China,a serial of field monitoring about temperature field of pipelines' ground were carried out for 1 year to demonstrate the influence of positive temperature pipelines on the temperature field and freeze-thaw characteristics of permafrost. The data analysis showed that the natural permafrost table is 1.5~2.0 m and the thawing period and freezing period are from May to September and from October to April of the following year,respectively. The heat budget of the permafrost monitored reached a balance,which meant that the frozen soil was in a critical state and prone to degradation due to the external thermal disturbance. The positive temperature gas pipeline led to the degradation of the permafrost and had a considerable impact on the permafrost with the horizontal influence range about 1.5 m. Furthermore, the depth of seasonal thawing goes over 7.0 m under the pipe. Meanwhile,it was pointed that for the permafrost in the critical state,based on the comprehensive and thorough understanding,the earlier negative effects of thermal disturbance caused by related engineering constructions were taken into consideration,the difficulty in their treatments would be lower and the loss would be smaller.

Key words: permafrost, positive temperature gas pipeline, ground temperature field, freeze-thaw process, measurement and analysis

中图分类号:

TE832

施瑞, 徐震, 刘德仁, 蒋代军, 王旭, 胡渊, 温智. 多年冻土地基正温输气管道地温场实测及分析[J]. 冰川冻土, 2019, 41(4): 865-874.

SHI Rui, XU Zhen, LIU Deren, JIANG Daijun, WANG Xu, HU Yuan, WEN Zhi. Measurement and analysis of the ground temperature field with positive temperature gas pipeline in permafrost regions[J]. Journal of Glaciology and Geocryology, 2019, 41(4): 865-874.

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多年冻土地基正温输气管道地温场实测及分析

Measurement and analysis of the ground temperature field with positive temperature gas pipeline in permafrost regions

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