Selective Preference Method of Highway Route Scheme in Permafrost Regions of Qinghai-Tibet Plateau Based on AHP and Fuzzy Comprehensive Evaluation

Chi Zhang, Kun Yang, Ya-long He, Xiao-Min Yan, Liang Meng


To solve the problem that traditional highway route selection method cannot fully consider the complex geographical environment in the permafrost region of Qinghai-Tibet Plateau, AHP (Analytic Hierarchy Process) and fuzzy comprehensive evaluation were introduced into the highway route comparison and selection in permafrost region. Influence degrees of various factors on different route schemes in permafrost regions of the Qinghai-Tibet Plateau were analyzed by the AHP. The annual average temperature, engineering reliability and engineering capacity were selected as the characteristic parameters and their weights were determined. Variation range of the various influencing factors in permafrost regions of the Qinghai-Tibet Plateau were analyzed by the fuzzy comprehensive evaluation, 5 evaluation grades of highway route scheme in permafrost regions were established, and the actual highway route schemes between Xiushui River and Yamarle River were compared and selected. The results show that the temperature and frozen soil diseases are the main factors affecting the highway route plan in the permafrost regions of the Tibetan plateau, outstanding route plan needs comprehensive consideration of stability of highway engineering and environmental protection.


road engineering; permafrost region; Qinghai-Tibet Plateau; route scheme comparison; AHP; fuzzy comprehensive evaluation


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