摘要
冻土路基热稳定性评价是一个复杂的工程评价问题.应用可拓理论,选取年平均地温、体积含冰量、天然上限、路基高度及路基走向5个影响路基热稳定性的主要因素作为冻土路基热稳定性的评价指标,将熵权法引入可拓学理论中,避免确定指标权重的主观随意性,从而建立熵权物元可拓模型,并将该模型应用于青藏铁路普通路基的热稳定性评价.将评价结果与青藏铁路现场监测系统中4个普通路基断面热稳定性监测结果进行对比,结果表明应用物元可拓模型可以得到比较可靠的路基热稳定性评价结果.因此,该评价方法可应用于冻土路基热稳定性评价.
Evaluation of the embankment thermal stability is a complicated decision-making issue. Through the application of extension theory, mean annual ground temperature, volume ice content, nature permafrost table, embankment height and road trend are selected as the evolution indexes of embankment thermal stability in per- mafrost. An entropy-weight and matter-element e xtension model is established by introducing the entropy weight method into theory of extenics, which avoids non-determinacy and optional randomness resulted from subjective opinions. Embankment over permafrost along the Qinghai-Tibet Railway is evaluated using the entropy-weight and matter-element extension model. Comparing of evaluated results with the field observation shows that the e- valuation is very satisfying. The present method is reasonable in comprehensive assessment of the embankment thermal stability.
出处
《冰川冻土》
CSCD
北大核心
2014年第1期123-129,共7页
Journal of Glaciology and Geocryology
基金
国家重点基础研究发展计划(973计划)项目(2012CB026106)
国家自然科学基金项目(40971045)
国家电网公司科技项目(SGJSJS2010935-936)资助
关键词
物元可拓模型
熵权
冻土路基
热稳定性
matter-element extension model
entropy weight
embankment over permafrost
thermal stability
