摘要
基于已有的或正在进行的研究结果 ,提出为应对高温冻土和全球变暖的严峻挑战 ,必须改变沿用的消极被动保护冻土的措施 ,采用积极主动的保护冻土措施 ,即冷却地基的办法 ,以确保工程的稳定 .分别从通风管、抛石护坡与碎块石互层通风、热棒 (桩 )、遮阳棚、热半导体保温材料和人工冻结技术在多年冻土保护中的应用等方面对这些措施的可行性进行了论证 ,可以看出 ,作为主动的地温调控技术 ,这几种措施在不同的范围内均有效果 ,都可以有效地抬升多年冻土上限 ,保护冻土路基稳定性 .因此 ,主动的地温调控技术作为保护冻土路基的措施是一条可行的方法 ,可以不同程度的在寒区工程建设中使用 .
An active measure of protecting frozen soils, namely cooling foundation, is put forward in order to face the severe challenge of high temperature frozen soil and world warming, and to insure the stability of engineering in cold regions. The feasibility of the measure is analyzed and discussed in the aspects of roadbed of ventilation duct, the ballast revetment and ballast roadbed, the roadbed of heat pipe, the roadbed of awning, development and application of heat preservation materials of thermal semiconductor and application of artificially freezing technology, respectively. It is found that as a technology of actively adjusting and controlling temperature in foundation, the measure is effective in different ranges, able to effectively raise permafrost table and can insure the stability of frozen soil foundation. So, it is a feasible method and can be applied to constructions in cold regions.
出处
《冰川冻土》
CSCD
北大核心
2002年第5期579-587,共9页
Journal of Glaciology and Geocryology
基金
中国科学院知识创新工程重大项目 (KZCX1 SW 0 4)
国家自然科学基金重大项目 (90 10 2 0 0 6)
中国科学院知识创新工程重要方向性项目 (KZCX2 3 0 6)资助
关键词
多年冻土
冷却地基
地温调控技术
寒区工程
permafrost
cooling foundation
technology of adjusting and controlling temperature in foundation
cold regions
