盾构井底板混凝土温控参数敏感性分析  

Sensitivity Analysis of Temperature Control Parameters of Shield Shaft Floor Concrete

作　　者：王振红[1] 张步 汪娟 张凯恒 WANG Zhenhong;ZHANG Bu;WANG Juan;ZHANG Kaiheng(Department of Structure and Materials,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]中国水利水电科学研究院结构材料研究所,北京100038

出　　处：《水力发电》2024年第4期47-52,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);流域水循环模拟与调控国家重点实验室自主研究项目(SKL2022ZD05)。

摘　　要：以珠江三角洲水资源配置工程的典型盾构井底板为例,采用saptis三维有限元软件,进行浇筑温度和通水冷却温控参数敏感性分析。结果表明,高温季节降低浇筑温度有利于控制混凝土内部最高温度,浇筑温度每增高1℃,内部最高温度增加约0.79℃,建议将浇筑温度降低至23℃;优化通水冷却参数(加密冷却水管,降低通水水温,适当延长通水时长)能达到良好的温控防裂效果。Taking the floor of a typical shield shaft in the Water Resources Allocation Project of Pearl River Delta as an example,the saptis three-dimensional finite element software is used to analyze the sensitivity of pouring temperature and water cooling temperature control parameters.The results show that,(a)reducing the pouring temperature in high temperature season is conducive to control the maximum internal temperature of concrete,and for every 1℃increase in pouring temperature,the maximum internal temperature increases by about 0.79℃,so it is recommended to reduce the pouring temperature to 23℃;and(b)optimizing the water cooling parameters(densifying the cooling water pipe,reducing the water temperature and appropriately prolonging water flow duration)can achieve good temperature control and cracking prevention effect.

关 键 词：盾构井 底板 温控防裂 浇筑温度 通水冷却 敏感性分析 仿真计算 

分 类 号：TV315[水利工程—水工结构工程]