摘要
本文通过对３０ 年来青藏铁路沿线典型地段地温数据的分析研究和相应的数值模拟分析， 认为近３０年的全球气温升高现象使青藏铁路沿线多年冻土区地温场正在向着不利于冻土生存的方向发展， 由此导致高原多年冻土工程地质环境条件和工程地质特征也发生了明显的变化。这些变化对铁路路基的修筑和运营期间的稳定性将产生巨大影响。研究和分析预测地温场变化规律以及预报高原多年冻土的发展趋势， 对青藏铁路的设计。
Based on the analytical study of ground temperature data and relevant numerical simulation analysis of typical sections along Qinghai Tibet Railway in the past 30 years,the paper holds that the phenomenon of global temperature rising causes the ground temperature field in the local permafrost region to change in the direction unfavorable to permafrost existence.As a result obvious variation of plateau permafrost engineering geology environmental conditions and characteristics is observed.The variation will produce great effect on the construction of railway subgrade and the stability of the subgrade during traffic operation. It is of realistic and prevising significance to study,analyse and predict the mode of variation of the ground temperature and foretell the development tendency of the plateau permafrost to the benefit of design, construction and operation of Qinghai Tibet Railway.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2000年第1期36-47,共12页
China Railway Science
关键词
青藏铁路
冻土
地温
路基
稳定性
Qinghai Tibet Railway, Permafrost, Ground temperature, Subgrade stability
