温度回升对坝体运行后期工作性态的影响研究  

Study on the Influence of Temperature Rise on the Working Behavior of Dam in the Later Stage of Operation

作　　者：周罗香 孙路毅 黄之源 王振红[2] 张凯恒 汪娟 张步 ZHOU Luoxiang;SUN Luyi;HUANG Zhiyuan;WANG Zhenhong;ZHANG Kaiheng;WANG Juan;ZHANG Bu(Huadian Fuxin Zhouning Pumped Storage Co.,Ltd.,Ningde 355400,Fujian,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]华电福新周宁抽水蓄能有限公司,福建宁德355400 [2]中国水利水电科学研究院,北京100038

出　　处：《水力发电》2024年第9期44-48,97,共6页Water Power

基　　金：国家重点研发计划项目(2021YFC3090102,2021YFC-3090104);国家自然科学基金资助项目(52192672)。

摘　　要：温度回升一直是大坝施工运行期间研究的重点之一。为此,结合周宁碾压混凝土重力坝,通过仿真建模,线性计算,采用张国新等人提出的高掺粉煤灰混凝土水化热温升组合函数模型,分析预测坝体后期温度回升,探究其对坝体变形、应力的影响。仿真预测结果表明,温度回升会在建坝4~5 a后达到峰值,温度回升对坝体变形的影响较小,温度回升至稳定后变形逐渐消除;对应力的影响总体来说是有利的,局部区域会产生拉应力过大。温度回升是一个长期过程,需要在大坝运行期工作性态安全评估充分考虑温度回升的影响。该研究预测性地分析了温度回升可能发生后对坝体运行后期工作性态的影响,可为其他工程温度回升的研究提供参考。Temperature recovery has been one of research focuses during the construction and operation of dam.Based on Zhouning RCC gravity dam,the combined function model of hydration heat rise of concrete with high fly ash dosage proposed by Zhang Guoxin and others are used to analyze and predict the temperature rise of the dam in the later stage through simulation modeling and linear calculation,and explore its influence on the deformation and stress of the dam.The simulation prediction results show that,(a)the temperature rise will reach the peak after 4-5 years of dam construction,the temperature rise will have little impact on the deformation of the dam body,and the deformation will gradually disappear after the temperature rises to stability;and(b)the effect on stress is generally favorable,and excessive tensile stresses can occur in local areas.Temperature rise is a long-term process,and the impact of temperature rise needs to be fully considered in the safety assessment of the working state during the operation of dam.This study predictively analyzes the impact of temperature rise on the working behavior of dam in the later stage of operation,which provides reference value for the temperature rise study of other engineering.

关 键 词：碾压混凝土重力坝 高掺粉煤灰混凝土 后期工作性态 温度回升 仿真计算 

分 类 号：TV642.4[水利工程—水利水电工程]