论文部分内容阅读
在归纳总结大体积碾压混凝土温控防裂技术要点的基础上,从放宽基础温差、增加间歇式中期冷却、施工期水管冷却五参数控制、冷却结束标准确定四个方面出发,阐述了高碾压混凝土重力坝通水冷却设计的优化方法。以官地水电站为例,对水管冷却方案做了改进,并基于跟踪监测数据与数值计算结果,实时调整设计参数。结果表明,官地水电站大坝混凝土的温控效果较好,各项应力指标满足蓄水安全要求,且整个施工期至运行初期未出现危害性的裂缝,为类似工程提供了借鉴。
On the basis of inducing and summarizing the main technical points of temperature control and cracking prevention of large-volume roller compacted concrete, four aspects of relaxation of basic temperature difference, increase of intermittent medium-term cooling, water-cooling five-parameter control in construction period and determination of cooling end standard are elaborated. Optimization of water cooling design of compression concrete gravity dam. Taking Guandi Hydropower Station as an example, the water pipe cooling scheme is improved. Based on the tracking monitoring data and numerical calculation results, the design parameters are adjusted in real time. The results show that the temperature control effect of dam concrete at Guandi Hydropower Station is better, all the stress indexes meet the requirements of water storage safety, and no harmful cracks occur during the whole construction period to the initial stage of operation, which provides a reference for similar projects.