青藏高原多年冻土钻孔回冻过程试验研究  

Experimental Research on Borehole Refreezing in Permafrost on Qinghai-Tibet Plateau

作　　者：阮国锋[1] 张建明[1] 穆彦虎[1] 

机构地区：[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

出　　处：《昆明理工大学学报（自然科学版）》2013年第4期23-26,共4页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家重点基础研究发展计划(973项目:2012CB026106);国家自然科学基金项目(40971045)

摘　　要：地温监测是研究多年冻土的重要方法.目前,多采用在钻孔中布设温度探头监测.由于钻孔施工对冻土的热扰动,获得准确的地温需要明确钻孔回冻时间.通过青藏高原开心岭段、北麓河段以及可可西里三个断面多年冻土钻孔回冻过程实验研究,认为钻孔回冻在10 d左右完成.回冻快慢主要与冻土年平均地温及回填土含水量有关.Ground temperature monitoring is an important method for permafrost research. At present, most prac-tices are attempting to put temperature probes in the borehole to measure the temperature of permafrost. Due to thermal disturbance in the process of drilling, however, the time of refreezing in the borehole must be determined in order to get the accurate ground temperature. According to our field tests conducted recently at Kaixinling, Beiluhe and Kekexili on Qinghai-Tibet plateau, the refreezing process of ground temperature in boreholes is able to finish in about ten days. The refreezing speed depends mainly on the mean annual ground temperature of per-mafrost as well as the water content of backfill soil.

关 键 词：多年冻土 钻孔回冻 年平均地温 含水量 

分 类 号：TU445[建筑科学—岩土工程]