摘要
隔河岩水电站引水钢管采用爆炸法消除焊接过程所产生的残余应力。为了探明消应的效果，在消应过程中进行了瞬态应变监测。在水电工程中进行这种瞬态应变监测，在国内尚属首次。本次监测测试本身是成功的。监测结果表明；消应效果满足要求的测点占总测点的７５％，这一百分比与盲孔法的检测结果基本一致。当然，这次测试是探索性的，实测资料有限，尚不能对这一方法作肯定的结论。然而，从这次监测实践可以看出，这一方法是值得进一步研究的，继续开展此项工作有利于完善和发展爆炸消应技术。
The blasting method was used for eliminating the Geheyan Hydropower Station penstock's residual stresses causeld by welding. In order to make sure of the effect of stress eliminating,the instantaneous strain monitoring was carried out during stress eliminating process. In China, it is the first to adopt such instantaneous strain monitoring for the hydropower project. This monitoring practice is successful itself. Monitoring result shows that the measuring points whose effect of stress eliminating meets the requirements of design,amount to 75% of the whole ones,in almost agreement with the result of the blind hole method. This testing, of course, is of exploratory work. Since the measured data are limited, the positive conclusion can not be drawn yet. However,this method is worth further studying,and in result the blasting-based stress eliminating technology might be developed.
出处
《人民长江》
北大核心
1994年第11期21-25,共5页
Yangtze River
关键词
隔河岩水电站
引水管道
爆破效应
应力
应变
Explosive effect Stress relief Stress observation Stress analysis Intake conduit Geheyan Hydropower Station
