摘要
冻土地区的土体冻胀会对输变电工程基础的设计、施工和安全运营等构成严重威胁。而土体冻胀变形问题是多物理场耦合问题,针对该问题,主要分析了热防护结构形式、底层土体温度、地表温度及热防护材料导热系数对地基温度分布、变形与应力的影响,并且充分分析路基水分场、温度场和变形场的变化过程及其耦合作用机理。对于改进并完善季节性冻土区输变电工程桩基础的设计、施工和运营维护具有巨大的现实意义。
The frost heave in the frozen soil area will cause a serious threat to the design,construction and safe maintenance on the foundation of transmission and transformation engineering.The soil frost heave deformation is a multi-physics coupling problem.This paper mainly analyzes the influence of thermal protection structure,bottom soil temperature,surface temperature and thermal conductivity of thermal protection materials on the temperature distribution,deformation and stress of foundation.And fully analyze the change process of the water field,temperature field and deformation field of the roadbed and the coupling mechanism.It is of great practical significance to improve and perfect the design,construction,operation and maintenance of pile foundations for power transmission and transformation projects in seasonal frozen soil areas.
作者
王仕俊
李惠庸
平常
WANG Shijun;LI Huiyong;PING Chang(Economic and Technology Research Institute of State Grid Gansu Electric Power Company,Lanzhou 730050,Gansu,China)
出处
《水利水电技术（中英文）》
北大核心
2021年第S01期235-242,共8页
Water Resources and Hydropower Engineering
基金
国家电网甘肃公司科研开发项目“甘肃省季冻区输变电工程基础冻融病害与材料损伤机理及防治技术研究”(52273018000D)
中科院冻土工程国家重点实验室开放项目“导电混凝土在季冻区输变电工程中的应用研究”(SKLFSE2017803)
关键词
冻土路基
数值模拟
温度
变形
应力
frozen soil roadbed
numerical simulation
temperature
deformation
stress
