摘要
多年冻土热融蚀敏感性是冻土环境变化评价的重要指标之一 ,在评价工程活动对多年冻土环境影响的敏感性变化起极为重要的作用。本文提出多年冻土热融蚀敏感性定量评价模型 ,通过青藏公路沿线地温监测资料用定量评价模型分析工程活动对多年冻土环境影响的敏感性变化。结果表明 :冻土热融蚀敏感性与多年冻土温度及年平均地温呈指数关系 ,与季节融化深度呈对数关系 ;冻土热融蚀敏感性变化也与冻融过程的变化相一致。
Thermal thawing sensibility play an important role in evaluating the sensible in fluence of engineering activity on frozen soil environment. Evaluating model of thermal thawing sensibility (EMTTS) is proposed, and the sensible influence of e ngineering disturbance on frozen soil environment is analyzed by using EMTTS acc ording to monitored data of ground temperature along Qinghai-Xizang Highway. The results of analysis show that thermal thawing sensibility of permafrost c hanges exponentially with permafrost temperature and annual mean ground temperature and logari thmically with seasonally freezing-thawing depth. The change of thermal thawing sensibility corresponds to the changes of seasonally freezing and thawin g process.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2001年第6期731-735,共5页
Chinese Journal of Geotechnical Engineering
基金
中国科学院寒区旱区环境与工程研究所创新项目(CRCX2 1 0 0 4 7
CRCX2 1 0 0 77)资助
南京大学博士后基金资助
