工程地质学报2023，Vol.31Issue(6)：2104-2114,11.DOI:10.13544/j.cnki.jeg.2021-0567
季冻区环境温度变化对加筋土挡墙内部温度场的影响研究
EFFECT OF AMBIENT TEMPERATURE CHANGING IN SEASONALLY FROZEN ZONE ON TEMPERATURE FIELD OF INNER REINFORCED-SOIL RETAINING WALL
摘要
Abstract
Cyclic variation of ambient temperature affects significantly the performance of geosynthetics-reinforced soil(GRS)retaining wall in seasonally frozen zone.Herein,on the basis of governing equation of transient heat con-duction,the two-dimensional finite difference method is derived and used to analyse the internal temperature distri-bution of reinforced soil retaining wall under the consideration of solar radiation and convection.The accuracy of nu-merical analysis is verified by comparison with model wall test results.Furthermore,comparative analysis is carried out to investigate the effect of thickness of facing panels and pavement and wall height on the temperature field of GRS wall.The results show the temperature near boundary of GRS wall fluctuates with the cyclic variation of ambi-ent temperature and is remarkably lagging behind the ambient temperature.The temperature variation inside GRS wall mainly occurs at the range of 3 m adjacent to boundary.The temperature distribution tends to be regionalized significantly.The ranges of 0～1 m and 1～3 m distance from back of facing panels and the bottom of pavement cor-respond to the temperature sensitive zone and easing zone,respectively.Increasing thickness of facing panels or pavement would not affect obviously the temperature distribute characteristics,however,would make temperature inside sensitive area more lagging behind the ambient temperature.When reducing the wall height with the un-changed width in horizontal direction,the temperature gradient in horizontal direction is not influenced significant-ly,but it results in remarkable effect on the temperature gradient in vertical direction.The results in this study can pave a firm foundation for the future study of long-term deformation and stability of GRS wall.关键词
季冻区/环境温度/加筋土挡墙/温度场/数值计算Key words
Seasonally frozen zone/Ambient temperature/GRS retaining wall/Temperature field/Numerical cal-culation分类
交通工程引用本文复制引用
肖成志,张亚涛,于洪兴,崔飞龙..季冻区环境温度变化对加筋土挡墙内部温度场的影响研究[J].工程地质学报,2023,31(6):2104-2114,11.基金项目
国家自然科学基金项目(资助号:52078182,41877255),河北省自然基金项目(资助号:E2018202108).This research is supported by the National Natural Science Foundation of China(Grant Nos.52078182,41877255)and Hebei Province Natural Sci-ence Foundation(Grant No.E2018202108). （资助号:52078182,41877255）
