Study on the sunny-shady slope effect on the subgrade of a high-speed railway in a seasonal frozen region  

作　　者：QingZhi Wang BoWen Tai ZhenYa Liu JianKun Liu 

机构地区：[1]School of Civil Engineering, Beijing Jiaotong University

出　　处：《Research in Cold and Arid Regions》2015年第5期513-519,共7页寒旱区科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51378057 and 41371081);Scientific and Technological Research and Development Plan of Chinese Railway Corporation(2014G003-A)

摘　　要：The temperature distributions of different parts of a subgrade were analyzed based on the results of three years of moni- toring data from the Harbin-Qiqihaer Passenger Dedicated Line, a high-speed railway, including the slope toes, shoulders, and natural ground. The temperature variation with time and the maximum frozen depths showed that an obvious sun- ny-shady effect exists in the railway subgrade, which spans a seasonal frozen region. Development of frost heave is af- fected by the asymmetric temperature distribution. The temperature field and the maximum frozen depths 50 years after the subgrade was built were simulated with a mathematical model of the unsteady phase transition of the geothermal field.The temperature distributions of different parts of a subgrade were analyzed based on the results of three years of moni- toring data from the Harbin-Qiqihaer Passenger Dedicated Line, a high-speed railway, including the slope toes, shoulders, and natural ground. The temperature variation with time and the maximum frozen depths showed that an obvious sun- ny-shady effect exists in the railway subgrade, which spans a seasonal frozen region. Development of frost heave is af- fected by the asymmetric temperature distribution. The temperature field and the maximum frozen depths 50 years after the subgrade was built were simulated with a mathematical model of the unsteady phase transition of the geothermal field.

关 键 词：high-speed railway sunny-shady slope effect frost heave temperature field 

分 类 号：U213.1[交通运输工程—道路与铁道工程]