Accounting for the solar radiation in thermal regime prediction for railway subgrade in cold regions  

作　　者：Alexander Isakov Anna Lavrova 

机构地区：[1]Department of Survey,Design and Construction of the Railways and Roads of the Siberian State University of Railway Engineering

出　　处：《Research in Cold and Arid Regions》2015年第4期293-299,共7页寒旱区科学（英文版）

摘　　要：This paper presents a comparative analysis of simulation processes of seasonal freezing-thawing of railway subgrade and permafrost degradation, with and without accounting for solar radiation. Also, the effect of sun screens to reduce the degradation of subgrade permafrost under different climatic conditions is numerically substantiated. And finally, the temperature criterion of the origination of permafrost is illustrated.This paper presents a comparative analysis of simulation processes of seasonal freezing-thawing of railway subgrade and permafrost degradation, with and without accounting for solar radiation. Also, the effect of sun screens to reduce the degradation of subgrade permafrost under different climatic conditions is numerically substantiated. And finally, the temperature criterion of the origination of permafrost is illustrated.

关 键 词：solar radiation thermal balance subgrade seasonal freezing-thawing PERMAFROST cryolite zone 

分 类 号：U213.14[交通运输工程—道路与铁道工程]