探地雷达在黑龙江漠河县城区冻土勘测中的应用

doi:10.7522/j.issn.1000-0240.2015.0081

冰川冻土 ›› 2015, Vol. 37 ›› Issue (3): 723-730.doi: 10.7522/j.issn.1000-0240.2015.0081

探地雷达在黑龙江漠河县城区冻土勘测中的应用

陈琳^1,2, 喻文兵¹, 易鑫^1,2, 吴颖³, 马悦³

1. 中国科学院寒区旱区环境与工程研究所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. 四川大学水利水电学院水力学与山区河流开发保护国家重点实验室, 四川成都 610065

收稿日期:2014-12-06 修回日期:2015-05-20 出版日期:2015-06-25 发布日期:2015-09-29
通讯作者: 喻文兵, E-mail: yuwb@lzb.ac.cn. E-mail:yuwb@lzb.ac.cn
作者简介:陈琳(1989-), 男, 四川德昌人, 2015年于中国科学院寒区旱区环境与工程研究所获硕士学位, 现为加拿大蒙特利大学在读博士研究生, 主要从事冻土环境与工程方面的研究. E-mail: chl_sc@163.com
基金资助:
国家重点基础研究发展计划(973计划)项目(2012CB026102);国家自然科学基金创新群体项目(41121061)资助

Application of ground penetration radar to permafrost survey in Mohe County, Heilongjiang Province

CHEN Lin^1,2, YU Wenbing¹, YI Xin^1,2, WU Ying³, MA Yue³

1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China

Received:2014-12-06 Revised:2015-05-20 Online:2015-06-25 Published:2015-09-29

摘要/Abstract

摘要： 在气候变暖影响下, 多年冻土对人类活动的响应更加敏感, 以至加速退化. 冻土退化后带来的生态环境和工程建筑热稳定性问题也会更加明显. 以黑龙江省漠河县城区为例, 结合钻孔资料和温度监测数据, 应用探地雷达对城区中心以及周边的多年冻土分布特征进行了探测, 研究分析了城市化对多年冻土的热影响. 结果表明: 雷达波在漠河城区地层的传播速度为0.07~0.08 m·ns^-1, 探地雷达结果与钻孔、温度监测资料相一致, 能够较准确的确定融化深度、冻土类型、地层结构. 城区对冻土退化影响较大, 城区中心冻土退化严重, 探测范围(0~10 m)内无冻土存在; 城郊周围沼泽化湿地下部普遍发育含冰量较高的多年冻土, 人为扰动影响较小, 冻土上限较浅, 冻土热状况相对稳定. 随着漠河城区逐渐扩张, 拟建或在建市政工程大多将修建在城郊周围沼泽化湿地上, 人为活动不断增加势必会加速多年冻土退化, 但其长期热影响范围和程度还需深入研究.

关键词: 多年冻土, 漠河城区, 探地雷达, 冻土上限

Abstract: With global warming, permafrost is subsequently sensitive to human activity, resulting in permafrost degradation. Environmental and ecological problems, as well as thermal stability of engineering, will follow. A geotechnical and geophysical investigation, including ground penetrating radar (GPR) profiling, ground temperature monitoring and drilling, was carried out to study the distribution and characteristics of permafrost in Mohe County of Heilongjiang Province. It is found that GPR could accurately distinguish the distributional range of permafrost, the type of frozen soil and stratum structures. It is revealed that the optimal average radar wave velocity in the layers of study regions (0~10 m) was 0.07~0.08 m·ns^-1. The effect of artificial disturbance on permafrost in urban areas is stronger than that in rural areas. Permafrost degradation in urban areas is serious, where permafrost table is usually more than 10 m in depth, but it is smaller in rural areas. However, with the increase of population and expansion of city zone, there are many buildings planned to construct or being constructed on swamp grounds surround the city. It is necessary to further study the heating range and thawing depth within permafrost.

Key words: permafrost, Mohe County, ground penetrating radar (GPR), permafrost table

中图分类号:

P642.14

陈琳, 喻文兵, 易鑫, 吴颖, 马悦. 探地雷达在黑龙江漠河县城区冻土勘测中的应用[J]. 冰川冻土, 2015, 37(3): 723-730.

CHEN Lin, YU Wenbing, YI Xin, WU Ying, MA Yue. Application of ground penetration radar to permafrost survey in Mohe County, Heilongjiang Province[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2015, 37(3): 723-730.

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探地雷达在黑龙江漠河县城区冻土勘测中的应用

Application of ground penetration radar to permafrost survey in Mohe County, Heilongjiang Province

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