关于高寒地区基础约束区混凝土温控标准的讨论

Discussion on concrete temperature control standard for foundation restraint area in alpine region

以高寒地区为研究背景,通过仿真计算分析混凝土坝段温度应力包络线的发展规律。计算结果表明:由于高寒地区约束区混凝土受到混凝土温差、基岩弹模、混凝土浇筑间歇期、基岩坑洼表面产生的应力集中等多因素影响,该地区的基础约束区混凝土温控措施标准可以在现有指标上适当放宽。以此更好的满足高寒环境实际施工要求,为工程的设计施工提供有利参考。

By taking alpine region as the study background, the development law of the thermal stress envelope of the concrete dam section is analyzed through a simulation calculation. The result shows that as the concrete of the foundation restraint area in an alpine region is always impacted by so many factors such as temperature difference of concrete, elastic modulus of foundation rock, concrete placing intermission, stress concentration caused by the bumpy and rough surface of foundation rock, etc. , the concrete temperature control standard for the foundation restraint area in the region can be adaptably lowered than that of the current one. In this way, the actual construction requirement for the alpine environment can be met satisfactorily, and then a favorable reference can be provided for both the design and construction of the project concerned as well.