Field observations of the thermal stability of permafrost under buildings with an underfloor open ventilation space and pile foundations in warm permafrost at high altitudes

作     者：Xin HOU Ji CHEN Yu SHENG Peng-Fei RUI You-Qian LIU Shou-Hong ZHANG Tian-Chun DONG Jia-Wei GAO 

作者机构：Beiluhe Observation and Research Station of Frozen Soil Engineering and EnvironmentState Key Laboratory of Frozen Soil EngineeringNorthwest Institute of Eco-Environmental and ResourcesChinese Academy of SciencesLanzhou 730000China China Railway QinghaieTibet Group Co.LtdXining 810007China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Advances in Climate Change Research》 (气候变化研究进展（英文版）)

年 卷 期：2023年第14卷第2期

页      面：267-275页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 081401[工学-岩土工程] 08[工学] 0705[理学-地理学] 0706[理学-大气科学] 070501[理学-自然地理学] 0814[工学-土木工程] 

基　　金：the National Key Research and Development Program of China(2022YFF1302600) the State Key Laboratory of Frozen Soil Engineering Funds(SKLFSE-ZY-19,SKLFSE-ZQ-202103) 

主　　题：Warm permafrost Infrastructure Open ventilation space Pile foundation Cooling effect 

摘      要：Pile foundations combined with ventilation spaces under floors are the most common method in buildings over *** safety and stability of buildings are closely related to the temperature of ***,there are limitations of understanding on this method in the high-altitude,warm(−1℃)permafrost areas on the Qinghai–Tibet *** this study,the thermal stability of permafrost foundation soils under buildings with an underfloor open ventilation space and pile foundations in warm permafrost at high altitudes was studied through field observations of ground and air temperatures,wind speed,net radiation from 2017 to *** results indicated that the open ventilation space exerted an effective cooling effect on the underlying permafrost and pile foundations from March to October,while a thermal insulation effect was observed from November to February of the following year,but overall,the cooling effect dominated;the cooling effect of open ventilation spaces differed *** permafrost temperature on the south-facing side was higher than that on the north-facing side,and those on the east and west sides were higher than that directly under the open ventilation space of the *** study also demonstrated that radiation shielded by the building was a main factor of the cooling effect of open ventilation spaces,and the cooling effect of open ventilation spaces could accelerate the back-freezing of the cast-in-place(CIP)pile *** structure could effectively maintain the frozen state of the underlying warm permafrost at high elevations on the interior Qinghai–Tibet Plateau.