某堆石混凝土拦沙坝施工期温度应力仿真分析  

Simulation Analysis of Temperature Stress of Rock-filled Concrete Bar During Construction of a Pumped Storage Power Station

作　　者：李锋[1] 王生茂 周琦莙 郭立红 李玲玉 LI Feng;WANG Shengmao;ZHOU Qijun;GUO Lihong;LI Lingyu(PowerChina Northwest Engineering Corporation Linited,Xi′an,Shaanxi 710065,China;Shaanxi Water Supply Shitouhe Weibei Water Diversion Project Construction Co.,Ltd.,Baoji,Shaanxi 722200,China;SinoConfix Co.,Ltd.,Beijing 100085,China;Zhejiang Yicheng Testing Co.,Ltd.,Jinhua,Zhejiang 321015,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [2]陕西水务石头河渭北引水工程建设有限公司,陕西宝鸡722200 [3]北京华石纳固科技有限公司,北京100085 [4]浙江意诚检测有限公司,浙江金华321015

出　　处：《水利与建筑工程学报》2024年第1期18-24,共7页Journal of Water Resources and Architectural Engineering

基　　金：西北寒冷地区堆石混凝土坝设计与施工关键技术专题研究(BD-1-2023-0016)。

摘　　要：为了研究堆石混凝土技术在抽水蓄能电站中热力学性能和温度应力水平,依托某抽蓄水能电站的堆石混凝土拦沙坝工程,对坝体堆石混凝土在施工过程中坝体温度应力进行有限元仿真分析,初步掌握坝体在施工过程中温度应力变化规律,并据此进行坝体宽度和温控措施进行分析。结果表明:在施工过程中坝体内部最高温升低于堆石混凝土的绝热温升,且坝体整体应力水平较低,平均拉应力低于0.83 MPa,满足设计要求;对于不同坝段宽度,坝段宽度对该工程温度场和应力场影响不大,可进一步论证增加坝段宽度,简化施工工艺,降低施工成本。采取相当于8 cm~12 cm厚度的聚苯乙烯泡沫板的保温措施时可有效降低冬季坝体表面的高拉应力,避免产生开裂风险。In order to study the thermodynamic performance and temperature stress level of rockfilled concrete technology in pumped storage power plants,based on the rockfilled concrete sand dam project of an energy pumping power station,the finite element simulation analysis of the temperature stress of the dam body during the construction process is carried out,and the variation law of the temperature stress of the dam body during the construction process is initially understood.The threedimensional finite element software patran and abaqus were used for the simulation of this calculation and analysis.Through calculation and analysis,it can be seen that the maximum temperature rise inside the dam body is lower than the adiabatic temperature rise of the rockfilled concrete during construction,the overall stress level of the dam body is low,and the average tensile stress is lower than 0.83 MPa,which meets the design requirements.For the different width of the dam section,the dam section width has little effect on the temperature field and stress field of the project.It can be further demonstrated that increasing the dam section width can simplify the construction technology and reduce the construction cost.For different insulation measures,adopting the insulation measures equivalent to 8 cm~12 cm thickness of polystyrene foam board can effectively reduce the high tensile stress on the dam surface in winter and avoid the risk of cracking.

关 键 词：堆石混凝土 温度应力 绝热温升 仿真分析 

分 类 号：TV641.4[水利工程—水利水电工程]